JP2592804Y2 - Self-sealing fittings - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-sealing joint for connecting and disconnecting a fluid passage, and more particularly to a self-sealing joint for preventing a seal member from being detached due to a differential pressure of a fluid pressure.

[0002]

2. Description of the Related Art Conventionally, various self-sealing joints for connecting and disconnecting a fluid passage, and a self-sealing joint comprising a female joint and a male joint detachably connected thereto have been put to practical use. In order to enable the self-sealing joint to be connected smoothly, the present applicant has incorporated a self-sealing mechanism incorporating a swing mechanism for swingably swinging the valve structure inside the housing of the female joint. A joint was proposed (for example, Japanese Utility Model Application Laid-Open No. 60-52495, 52496).
Reference).

Further, the applicant of the present application has further developed the self-sealing joint, and has proposed a self-sealing joint incorporating a slide aligning mechanism for sliding a valve structure in a direction orthogonal to an axis in a female joint or a male joint. (July Hei 4-432)
No. 65, see Japanese Utility Model Laid-Open No. 5-). In addition, actual Kaihei 2
Japanese Patent Publication No. 209,693 discloses a self-sealing joint having substantially the same function as the above-mentioned self-sealing joint, in which a poppet valve is applied to a valve mechanism inside a female joint or a male joint.

[0004]

The self-sealing joint described in the above-mentioned gazette proposed by the applicant of the present application includes:
As shown in FIG. 5, a spool valve 1 comprising a spool valve portion 103 and a valve hole 104 is provided on a valve member 102 of a female joint 101.
The male joint 106 is provided with a spool valve 109 including a spool valve portion 107 and a valve hole 108, and a poppet valve 112 including a poppet valve portion 110 and a poppet valve seat 111. When connecting the male joint 106, both the spool valves 105 and 109 and the poppet valve 1
12 were simultaneously opened. Therefore, for example, when the female joint 101 is connected to the male joint 106 and the hydraulic pressure is supplied from the female joint 101 when the male joint 106 is in a low pressure state, the two spool valves 105, 1
09 and the poppet valve 112 are simultaneously opened, the seal members (O-rings) 11 of the two spool valves 105 and 109 are opened.
The high-pressure hydraulic pressure in the female joint 101 acts on one side of the seal members 113 and 114, and only the low-pressure hydraulic pressure in the male joint 106 acts on the other side of the seal members 113 and 114. However, there is a problem that it is separated by the high pressure difference. SUMMARY OF THE INVENTION It is an object of the present invention to provide a self-sealing joint that can reliably prevent the detachment of a seal member from a spool valve portion of a valve mechanism.

[0005]

A self-sealing joint according to claim 1 is a female joint having a valve mechanism for opening and closing a fluid passage;
A self-sealing joint comprising a fluid passage connected to the fluid passage of the female joint and a male joint detachably connected to the female joint and having a valve mechanism for opening and closing the fluid passage,
The female joint includes a housing and a valve component housed in the housing and incorporating the valve mechanism. The valve mechanism of the female joint includes a first land at an end of a male joint and a first land. A valve opening rod having a second land portion deeper than the land and a seal member mounted on the second land portion; and a first valve which is externally fitted to the valve opening rod and cooperates with the first land portion.
A movable sleeve having a first valve hole forming a valve portion, and a second valve hole forming a second valve portion in cooperation with the second land portion;
A spring for urging the movable sleeve toward the male joint,
A buffer fluid chamber formed between the first and second valve portions and between the valve-opening rod and the movable sleeve, wherein the male joint is attached to the housing, and comes into contact with the movable sleeve; A male member having a small-diameter cylindrical portion for pushing the sleeve to the rear, wherein the valve mechanism of the male joint is mounted in a fluid passage in the male member and cooperates with a valve hole at the female joint side end of the small-diameter cylindrical portion. A movable valve shaft that is operated to open by contacting a valve opening rod, and a second valve of the female joint.
It comprises a poppet valve that is opened by a movable valve shaft after the valve section is opened, and a spring that biases the movable valve shaft toward the female joint.

Here, the female joint is provided with a swing support mechanism for swingably swinging the valve structure in all directions about a point on the axis thereof at a predetermined small angle with respect to the housing in all directions. And a slide aligning mechanism that supports the valve component on the housing so as to be movable by a predetermined small distance in a direction perpendicular to the axis of the valve component (claim 2 depending on claim 1).

The swing support mechanism includes a first partial spherical surface formed on a rear end surface of the valve component, a first spherical seat member that makes spherical contact with the first partial spherical surface, and an axial middle portion of the valve component. A configuration including an annular second partial spherical surface formed on the outer peripheral surface of the second spherical surface and an annular second spherical seat member that is in spherical contact with the second partial spherical surface (claim 3 depending on claim 2);

The slide aligning mechanism is formed on the housing, and is formed on the housing, with a first guide surface for abutting the flat end surface of the first spherical seat member to guide the rear end surface in the direction perpendicular to the axis. A second abutting surface of the second spherical seat member, which guides the distal surface in a direction perpendicular to the axis;
A configuration including a guide surface (claim 4 dependent on claim 3);
And so on.

[0009]

In the self-sealing joint according to the first aspect, when the male joint and the female joint are separated, the internal fluid is sealed by the first valve portion and the second valve portion in the female joint. In the male joint, the internal fluid is sealed by the valve portion and the poppet valve. When connecting the male joint to the female joint, when the small-diameter tubular part of the male joint is inserted into the female joint, the valve-opening rod comes into contact with the movable valve shaft, and the movable valve shaft is pushed backward, The sleeve is also pushed to the back.
Before the poppet valve opens, the first valve portion and the second valve portion of the female joint and the valve portion of the male joint are opened, the buffer fluid chamber is filled with fluid pressure, and the sealing of the second land portion is performed. The poppet valve opens with the member positioned in the buffer fluid chamber. Therefore, since a high differential pressure does not act on the seal member, the seal member does not come off.

[0010] In the self-sealing joint of claim 2,
Since the female joint is provided with a swing support mechanism that supports the valve component so that the valve component can swing freely and a slide alignment mechanism that supports the valve component so that the valve component can move a small distance in the direction orthogonal to the axis, When connecting the female joint and the male joint, both joints can be connected smoothly.

[0011] In the self-sealing joint of claim 3,
Since the swing support mechanism includes a first partial spherical surface, a first spherical seat member, a second partial spherical surface, and a second spherical seat member, the swing support mechanism may be configured as a simple swing support mechanism. it can. In the self-sealing joint according to the fourth aspect, the slide centering mechanism includes a first guide surface that guides the first spherical seat member in a direction orthogonal to the axis, and a second guide surface that guides the second spherical seat member. Therefore, it is possible to configure a slide alignment mechanism having a simple configuration.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. This embodiment is an example in which the present invention is applied to a self-sealing joint for connecting / disconnecting a hydraulic passage of a hydraulic supply system. It is also applicable as a self-sealing joint for the supply system. As shown in FIGS. 1 to 4, the self-sealing joint 1 includes a male joint 10 and a female joint 50. For example, the male joint 10 is fixedly provided to a mechanical device (not shown), and is used for hydraulic equipment of the mechanical device. The female joint 50 is fixedly provided to a moving body such as an oil passage connecting device (not shown) which moves forward and backward with respect to the mechanical device, and is detachably connected to the male joint 10. It is connected to a hydraulic supply device (not shown). However, female joint 50
May be fixedly provided, and the male joint 10 may be movably provided.

First, the male joint 10 will be described. The male joint 10 includes an integral housing 11, a valve component 12 screwed to the housing 11, and a spring 13.
And a filter member 14 made of a perforated plate and a net material. The valve component 12 includes a male member 15 screwed to the housing 11 and a movable valve shaft 16 mounted on the male member 15. The housing 11
A large-diameter concave hole 17 is formed from the distal end surface of the male member 15, and a large-diameter cylindrical portion 18 on the proximal end side of the male member 15 is screwed into the concave hole 17. A concave hole 19 having a diameter is provided, and a port forming member 21 having an oil passage port 20 formed in an axial center portion is screwed into the concave hole 19.

The male member 15 includes a base member 45 fitted inside the base hole of the concave hole 17 and a base member 45 having the base end.
And a distal end member 46 having a proximal end outer peripheral portion screwed into the inner peripheral portion of the concave hole 17 and a distal end portion protruding outward from the concave hole 17. The male member 15 includes a large-diameter cylindrical portion 18, a flange 22 at the tip thereof, and a flange 2.
2 a small-diameter cylindrical portion 2 extending a predetermined length from the center of the tip to the outside of the tip
An oil passage 25 is formed in the large-diameter cylindrical portion 18 so as to communicate with an oil passage 24 provided on the base end side of the concave hole 17 of the housing 11. An oil passage hole 26 communicating with the male member 15 is formed, and an annular poppet valve seat 27 is formed at the base end of the male member 15. The oil passage 25
Extends outward from the base end of the oil passage hole 26 in the male member 15 and then extends obliquely inward to the inside of the poppet valve seat 27, where the base end member 45 and the front end member 46 Is provided with a filter member 14 made of a perforated plate and a mesh material.

The oil passage 24 is provided in a hole 28 which is located at the axial center of the housing 11 and communicates with the concave holes 17 and 19. The large diameter hole of the hole 28
9 are provided. A plurality of oil passage grooves 30 are formed on the outer periphery of the poppet valve body 29, and the poppet valve seat 27 is formed.
A sealing member 31 made of synthetic resin is buried in a portion opposed to. Further, this poppet valve body 29 is
2 biases toward the poppet valve seat 27 side. The poppet valve element 29, the sealing member 31, and the hoppet valve seat 27 constitute a poppet valve 33. The male member 15 is provided with a guide hole 34 in which the rear part of the movable valve shaft 16 is slidably slidably forward and backward, and which is communicated with the oil passage 25, behind the central part in the axial direction. When the valve is opened, the poppet valve 3
The third poppet valve body 29 is configured to be pushed rearward against the urging force of the spring 32 to open the hoppet valve 33.

The oil passage port 20 of the port forming member 21
The filter member 3 made of a perforated plate and a net material
7 are provided. The spring 13 includes the male member 1.
5, and urges the movable valve shaft 16 toward the small-diameter valve hole 38 provided at the tip of the small-diameter cylindrical portion 23, that is, toward the female joint 50. The movable valve shaft 16 is provided at its tip with a valve body portion 40 which forms a valve portion 39 in cooperation with a valve hole 38. Large diameter portion 42 provided with oil passage groove 41
Are formed. The large-diameter portion 42 has the movable valve shaft 16 moved toward the distal end by the urging force of the spring 13,
When the valve portion 39 is in the valve closed state, the valve portion 39 comes into contact with the inner surface of the valve hole 38 to prevent the movable valve shaft 16 from moving further toward the distal end. Reference numerals 43 and 44 are O-rings.

Next, the female joint 50 will be described. The female joint 50 includes a housing 54 including a proximal housing member 51, a cylindrical housing member 52, and a distal housing member 53, a valve component 55 having a valve mechanism for opening and closing a fluid passage, and a valve. A swing support mechanism for supporting the component 55 on the housing 54 in such a manner that the component 55 is pivotable by a predetermined small angle in all directions about a point P on the axis X, and a valve component 55 in a direction orthogonal to the axis X. A slide centering mechanism and the like supported by the housing 54 so as to be movable by a predetermined small distance are provided. The base housing member 51 includes an oil passage port 5.
6, a filter member 59 made of a perforated plate and a mesh material is interposed in the oil passage 57 communicating with the oil passage port 56 via a ring member 58, and pressurized air is supplied to the base end housing member 51. A pressurized air port 60 for introduction and an air passage 61 communicating therewith are formed.

The valve member 55 includes a female member 62, a movable sleeve 63, a valve opening rod 64, a spring 65, and the like. A large-diameter valve hole 66 is formed in the female member 62, and a distal end portion of the large-diameter valve hole 66 is slightly reduced in diameter to form a stepped portion 67. A movable sleeve 63 having a step to be stopped is slidably mounted.

The valve-opening rod 64 is a first land portion 68 at the distal end portion thereof, and the first land portion 68 is oil-tightly fitted in a first valve hole 63a at the distal end portion of the movable sleeve 63.
A small-diameter and short-length first rod portion 69 extending from the first land portion 68 to the back, and a second land portion 70 provided from the end of the first rod portion 69 to the back. A second land portion 70 oil-tightly fitted in a small-diameter second valve hole 71 provided at a substantially central portion in the axial direction of the movable sleeve 63, and a second land portion 70 provided with a seal member including an O-ring 72; The second rod portion 73 is formed from a second rod portion 73 extending from the land portion 70 to the back side, and a large-diameter portion 74 provided from an end to a base end of the second rod portion 73.

The first land portion 68 and the first valve hole 63a cooperate to form a first valve portion 75, and the second land portion 70
And the second valve hole 71 cooperate to form the second valve portion 76. O for sealing between the movable sleeve 63 and the female member 62
A ring 77 is provided, the movable sleeve 63 is urged toward the distal end by a spring 65 against the large-diameter portion 74, and a through hole 78 is formed in the movable sleeve 63. The movable sleeve 63 is an oil passage 79 that is provided from the large diameter portion 74 to a middle portion of the second rod portion 73 and communicates with the large diameter valve hole 66. Partial spherical surface 8
An oil passage 79 communicating with an oil passage 82 provided in the first spherical seat member 81 which is in contact with the spherical surface at 0 is formed in the axial center portion. On the outer peripheral side of the distal end side portion of the female member 62, an annular gap 83 for allowing the valve member 55 to swing around one point P is formed,
The O-ring 84 seals the space between the female member 62 and the tip housing member 53, and centers the female member 62.

The swinging support mechanism includes a first partial spherical surface 80 (the center of which is a point P) formed on the base end surface (rear end surface) of the large diameter portion 74 of the valve opening rod 64, A first spherical seat member 81 in spherical contact with the spherical surface 80;
An annular second partial spherical surface 85 (the center thereof is at one point P) formed on the outer peripheral portion at an intermediate portion in the axial direction, an annular second spherical seat member 86 in spherical contact with the second partial spherical surface 85, The space 83 includes an annular space 87 between the female member 62 and the second spherical seat member 86.

The slide centering mechanism is arranged so that a planar base end surface of the first spherical seat member 81, which is perpendicular to the axis X, is slidably contacted with the base end surface 88. First guide surface 89 formed on proximal housing member 51
And a distal end surface 90 which is a planar distal end surface of the second spherical seat member 86 and is orthogonal to the axis X, and is formed on the distal end housing member 53 so as to slidably contact the distal end surface 90. A second guide surface 91, an annular gap 92 between the first spherical seat member 81 and the cylindrical housing member 52, an annular gap 93 between the second spherical seat member 86 and the cylindrical housing member 52,
The gaps 83 and 87 are provided.

With respect to the oil passage, the oil passage 57 is connected to the second valve hole 71 via the oil passage 82 of the first spherical seat member 81, the oil passage 79 of the large diameter portion 74, and the large diameter valve hole 66. Are in communication.
Then, a first valve constituted by a second valve portion 76 constituted by a second land portion cooperating with the second valve hole 71 and a first land portion 68 constituted by a cooperating with the first valve hole 63a. A buffer oil chamber 94 is formed between the valve opening rod 64 and the movable sleeve 63 between the portion 75.

Regarding the air passage, the pressurized air port 60
The air passage 61, an annular air passage 95 between the valve component 55 and the cylindrical housing member 52, a gap 93, and a cross groove 96 formed at a position near the distal end surface 90 of the second spherical seat member 86. A plurality of injection holes 97 for air injection are formed at the distal end of the female member 62 at an angle of about 45 degrees in the axial direction at the tip end of the female member 62.
At the time of connection, pressurized air is ejected from these injection holes 97 so that the distal end of the small-diameter cylindrical portion 23 of the male joint 10 and the valve portion 39 can be blown with air. In addition, female joint 5
At the distal end of the female member 62, an annular tapered surface 98 having a diameter increasing toward the distal end is formed, and at the time of connection, the male member 15 of the male joint 10 is guided and centered by the annular tapered surface 98. It is configured so that:

Next, the operation of the self-sealing joint 1 described above will be described. When the self-sealing joint 1 is connected, it operates continuously in the order of FIGS. 1, 2, 3, and 4, and when the self-sealing joint 1 is separated, it operates continuously in the reverse order. Become. First, the operation of the valve mechanism of the male joint 10 and the valve mechanism of the female joint 50 will be described.
As shown in FIG. 1, when the male joint 10 and the female joint 50 are separated, the female joint 50 includes a first valve portion 75 including a first land portion 68 and a first valve hole 63 a, and a second valve portion 75. The passage of the pressure oil is shut off by the second valve portion 76 including the land portion 70 and the second valve hole 71, and in the male joint 10, the valve portion 39 including the valve hole 38 and the valve body portion 40 is closed. , Poppet valve 3
3, the pressure oil passage is shut off.

When the male joint 10 is connected to the female joint 50, the small-diameter cylindrical portion 23 of the male member 15 of the male joint 10 is inserted into the female joint 50 as shown in FIG. The valve opening rod 64 comes into contact with the movable valve shaft 16 of the male joint 10, and as shown in FIG. 3, the movable valve shaft 16 is pushed to the back, and the movable sleeve 63 is also pushed to the back. Then, before the poppet valve 33 of the male joint 10 opens, the first valve portion 75 and the second valve portion 76 of the female joint 50 and the valve portion 39 of the male joint 10 open, and the buffer oil of the female joint 50 The chamber 94 is filled with pressurized oil,
As shown in FIG. 4, the seal member 72 of the second land portion 70
Is located in the buffer oil chamber 94, the poppet valve 33 of the male joint 10 is opened.

Therefore, since a high differential pressure does not act on the seal member 72, the seal member 72 does not come off. As shown in FIG. 4, when the poppet valve 33 and the valve portion 39 of the male joint 10 and the first valve portion 75 and the second valve portion 76 of the female joint 50 are opened, the oil passage port 56 and the oil passage port 2
0 indicates oil passages 57, 82, 79, large diameter valve hole 66, second valve hole 71, buffer oil chamber 94, first valve hole 63a, valve hole 38, oil passage hole 26, oil passage 25, oil passage. 24.

Next, the operation of the swing support mechanism and the slide centering mechanism will be described. Shaft center Y of male joint 10 and female joint 5
In the case where the self-sealing joint 1 is connected in a state where the axis X of 0 is parallel and aligned, the male joint 10 is connected as shown in the figure.
And the female joint 50 are smoothly fitted and connected. At this time, as shown in FIG. 2, the small-diameter cylindrical portion 23 fits into the distal end portion of the female member 62, the small-diameter cylindrical portion 23 abuts on the distal end of the movable sleeve 63, and the valve portion 39 of the male joint 10 and the female joint The poppet valve 33 and the valve portion 39 of the male joint 10 and the first valve portion 75 and the second valve portion 76 of the female joint 50 do not open until the first valve portion 75 of the female 50 comes into contact with the first valve portion 75. Therefore, no oil leakage occurs. Further, since the tip of the small-diameter cylindrical portion 23 and the valve portion 39 are air-blown by the air ejected from the plurality of injection holes 97, no foreign matter is caught between the male joint 10 and the female joint 50.

When the self-sealing joint 1 is connected, if the shaft center X of the female joint 50 is slightly inclined with respect to the shaft center Y of the male joint 10, when fitting as shown in FIG. The valve structure is formed by the swinging action of the swing support mechanism through sliding between the first partial spherical surface 80 and the first spherical seat member 81 and sliding between the second partial spherical surface 85 and the second spherical seat member 86. Since 55 swings around one point P, both axes X and Y become parallel. In addition, the sliding between the base end surface 88 of the first spherical seat member 81 and the first guide surface 89 and the sliding between the distal end surface 90 of the second spherical seat member 86 and the second guide surface 91 in the slide centering mechanism. Since the valve component 55 moves by a small distance in a direction perpendicular to the axis X by the above centering action, both axes X and Y are aligned on the same axis. Therefore, even when the axes X and Y of the male joint 10 and the female joint 50 are not parallel, the male joint 10 and the female joint 50 are connected smoothly and smoothly.
The operation that does not cause oil leakage is the same as described above.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a self-sealing joint according to an embodiment in a separated state.

FIG. 2 is a sectional view of the self-sealing joint in a connection start state.

FIG. 3 is a cross-sectional view of the self-sealing joint in the middle of connection.

FIG. 4 is a cross-sectional view of the self-sealing joint in a connection completed state.

FIG. 5 is a cross-sectional view of a conventional self-sealing joint in the middle of connection.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Self-sealing joint 10 Male joint 11 Housing 15 Male member 16 Movable valve shaft 23 Small diameter cylindrical part 32 Spring 33 Poppet valve 38 Valve hole 39 Valve part 50 Female joint 54 Housing 55 Valve structure 62 Female member 63 Movable sleeve 64 Opening rod 65 spring 68 first land portion 69 first valve hole 75 first valve portion 70 second land portion 71 second valve hole 72 O-ring (seal member) 76 second valve portion 94 buffer oil chamber 80 first partial spherical surface 81 first 1 spherical seat member 85 second partial spherical surface 86 second spherical seat member 88 base end surface 89 first guide surface 90 distal end surface 91 second guide surface 83, 87, 92, 93, 95 gap

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F16L 29/00 F16L 37/00-39/04

Claims (4)

(57) [Scope of request for utility model registration] 1. A female joint having a valve mechanism for opening and closing a fluid passage, a fluid passage connected to a fluid passage of the female joint, and a valve mechanism for opening and closing the fluid passage and detachably connected to the female joint. A self-sealing joint comprising a male joint, wherein the female joint includes a housing, and a valve component housed in the housing and incorporating the valve mechanism. The valve mechanism of the female joint includes a male joint. A valve opening rod having a first land portion at a side end, a second land portion deeper than the first land, and a seal member attached to the second land portion; A movable sleeve having a first valve hole forming a first valve portion in cooperation with the first land portion, and a second valve hole forming a second valve portion in cooperation with the second land portion; A spring for urging the movable sleeve toward the male joint; A buffer fluid chamber formed between the valve-opening rod and the movable sleeve between the second valve portions, wherein the male joint is attached to the housing and abuts the movable sleeve to push the movable sleeve to the back. A male member having a small-diameter cylindrical portion to be pushed in, wherein the valve mechanism of the male joint is mounted in a fluid passage in the male member, and cooperates with a valve hole at the female joint side end of the small-diameter cylindrical portion. A movable valve shaft that is configured to open a valve by contacting a valve opening rod, a poppet valve that is opened by a movable valve shaft after the second valve portion of the female joint is opened, and the movable valve A self-sealing joint comprising a spring for urging the shaft toward the female joint. 2. The female joint according to claim 1, further comprising: a swing support mechanism for swingably swinging the valve member in all directions about a point on the axis thereof by a predetermined small angle with respect to the housing. 2. The self-sealing joint according to claim 1, further comprising: a slide aligning mechanism that supports the valve member on the housing so as to be movable by a predetermined small distance in a direction orthogonal to the axis of the valve member. 3. 3. The swing support mechanism includes a first partial spherical surface formed on a rear end surface of the valve component, a first spherical seat member that makes spherical contact with the first partial spherical surface, and an axial direction of the valve component. 3. The self-sealing device according to claim 2, further comprising: an annular second partial spherical surface formed on the outer peripheral surface of the intermediate portion; and an annular second spherical seat member which is in spherical contact with the second partial spherical surface. Fittings. 4. A first guide surface formed on a housing and slidingly contacting a rear end surface of a first spherical seat member in a plane and guiding the rear end surface in a direction perpendicular to the axis.
4. The self-powering device according to claim 3, further comprising: a second guide surface formed on the housing and abutting on the distal end surface of the second spherical seat member in a plane to guide the distal end surface in the direction orthogonal to the axis. Seal fitting.