JPS5958295A - Coupler for pressure conduit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coupler for connecting a pressurized air conduit to an air brake mechanism of a motor vehicle, in particular, comprising a plug-in member having a through central hole and screwed into an internally threaded hole in a connecting body. The socket member includes a socket member having a male thread and a through hole, and an elastically expandable retaining ring, and the retaining ring engages with the insertion member and the socket member to fix the relative positions of both members in the axial direction. Concerning the type of thing that is being done.

Plug-in fittings have the advantage over threaded fittings that the connection of the pipes is considerably easier.

This is because pressure conduits can be connected with a single touch even in areas that are difficult to access, whereas threaded joints often require more effort and time to screw in. It is. A plug-in joint of the above type is already known from German Patent Application No. 2,856,069, in which the socket element is connected to an element having a standard internal thread for a mating connection, for example to a brake cylinder. It is configured as an adapter that allows connection of a bayonet joint. In known couplers for compressed air conduits, the retaining ring is located close to the rear end of the socket member, resulting in a relatively thick structural length of the coupler.

The object of the invention is to improve a coupler of the type mentioned at the outset so that the structural length is as small as possible.

The present invention that solves this problem has a retaining ring that engages in an annular groove provided on the outer periphery of the end of the socket member that is located forward when viewed in the screwing direction, and that the retaining ring is prevented from expanding. ,
contact between the retaining portion of the retaining ring and the wall of the female threaded hole of the connection body; The locking part is elastically expandable relative to the part, and is engaged in an annular groove provided on the outer periphery of the insert member, and the expansion dimension of the holding part is such that the expansion dimension of the holding part is such that the expansion dimension of the insert member is It is characterized by being smaller than the engagement depth of the lock portion.

When the coupler is constructed in this way, the plug-in member passes through the socket member over its entire length and is locked at the front end of the socket member. This provides the desired large guiding length for the plug-in part, without the need for the socket part to protrude significantly beyond the rear end of the female threaded hole. Therefore, the socket member can be constructed such that only the (generally hexagonal) portion with the wrench fitting surface protrudes outside the female threaded hole.

Because the retaining ring is supported on the wall of the internally threaded hole, it cannot expand out of the annular groove of the socket member or the annular groove of the insert member. It is particularly advantageous to configure the outer diameter of the retaining ring to be approximately equal to the inner diameter of the female threaded hole as claimed in claim 7.The sealing ring according to claim 8 provides a particularly advantageous construction. By using such a sealing ring, it is possible to prevent dust from entering the area where the insert member fits into the socket member. It is also possible, as in the embodiment according to claim 9, to involve an elastic sealing ring in order to obtain an axial tensioning effect. However, such tightening means are not necessarily necessary;
In particular, it can be omitted when fixing the position in the axial direction using the means described in claim 23.

A particularly effective sealing effect can be obtained by configuring the shape of the seal ring and the shape of the recess that accommodates the seal ring as described in claims 10 and 11. An advantage of the embodiment according to claim 12 is that the plug-in part can remain fixed even when the socket part is unscrewed. Twisting of the hose connected to the plug-in part is therefore avoided even if the plug-in part becomes stuck in the socket part, for example due to the action of jet water, in particular salt-containing jet water.

A particularly advantageous embodiment of the retaining ring is defined in claim 1.
It is described in Items 3 to 18.

The conical surface according to claim 13 facilitates expansion of the retaining ring. It is particularly advantageous to arrange conical surfaces both on the plug-in part and on the retaining ring. The cross-sectional shape described in claim 14 facilitates expansion. This is because the retaining ring is relatively flexible to the extent that it is intended to expand.

If the radial slit described in claim 15 is provided, 1. Only slight deformation of the retaining ring is required to allow the retaining ring to fit into the socket member. If the dimensions of the retaining ring are designed in consideration of the elastic dust so that the retaining ring is locked to the socket member by expanding in the radial direction, a reference breaking portion as set forth in claim 16 may be provided. It is also possible that the reference break point is torn open, for example with a screwdriver, only when the retaining ring is to be removed from the socket part. The weakened notches according to claim 17 form flexible segments, which make it possible to insert the plug-in part with relatively little force.

The retaining ring can be made from a variety of different materials. Thermoplastic plastics, such as the materials described in claim 18, are particularly suitable as the material. If thermoplastics are used, it is also possible to manufacture the retaining ring as a plastic injection molding, which is a particularly economical manufacturing method.

The retaining ring may be made of metal as described in claim 19. In this case, the metal retaining ring is particularly economical (Claim 20).The locking part of the retaining ring is particularly suitable for locations where a particularly strong heat load occurs. As described in paragraph 21, two parts located diametrically opposite each other.
If it consists of only one pawl, the retaining ring can be produced particularly easily from sheet metal. In this case, the retaining ring can be constructed as claimed in claims 21 and 22. is particularly advantageous.

The axial position can also be fixed by fitting the locking portion into the outer circumferential annular groove of the insert member (Claim 23). In this case, in particular, axial tensioning means by means of sealing rings can be dispensed with. This axial tensioning means is as described in claim 9. In order to fit the locking part into the outer annular groove, it is particularly advantageous for the bottom surface of the outer annular groove to have a conical shape, as described in claims 24 and 25.

Next, embodiments of the present invention will be explained in detail with reference to the drawings.

The main components of the coupler are an insertion member 1 and a socket member 2.
and a retaining ring 3, said socket member 3 being screwed into a connecting body 4, for example the casing of a brake cylinder.

The plug-in part 1 has a tubular projection 5 for mounting a hose 6, which is shown in chain lines. The tubular projection 5 has a plurality of circumferential fins 7 in a known manner, which circumferential fins have an inverted hook-shaped cross section, so that slipping of the hose 6 is avoided.

A flange 8 is provided at the lower end of the tubular protrusion 5.
The lower surface 8a of the flange is pressed against an elastic seal ring 9 when the coupler is installed. Below the flange 8 there is a fitting section 10 having a cylindrical outer circumferential surface 10a, said cylindrical outer circumferential surface 10a fitting into the cylindrical hole 11 of the socket member 2.

The outer periphery of the fitting section 10 is provided with an annular groove 12 in which a sealing ring 13 is accommodated. The seal ring 13 contacts and seals the peripheral wall of the cylindrical hole 110.

At the lower end of the mating section 10, an annular groove 14 is provided on the outer periphery of the insert 1, in which the retaining ring 3 engages during installation.

Beneath the annular groove 14, the insert 1 has a conical surface 15, which converges towards the front (the end surface 16 of the insert 1 is the front end surface).

The plug-in member 1 has a through hole 17, the inner diameter of which is approximately equal to the inner diameter of the hose 6.

The socket member 2 has a threaded section 18 with an external thread 19.
have. A relatively thick flange 20 follows behind the threaded section 18 (on top in the drawing), the outer circumferential surface 20a of which is configured as a spanner-fitting surface or a hexagonal surface.

An annular groove 21 is provided on the lower surface 20b of the flange 20, and an elastic ξ-socket 22 accommodated in the annular groove is in contact with the upper surface 4a of the connection body 4.

The socket member 2 has a large diameter recessed portion 24 at the rear end (with the upper end surface 23 as the rear end surface), and the above-mentioned elastic seal ring 9 is disposed within the recessed portion. There is. The seal ring 9 is connected to the lower surface 24'a of the recessed portion 24 and the peripheral surface 24'a of the recessed portion 24.
b, while also in contact with the aforementioned lower surface 8a of the flange 8 and the cylindrical surface 25 of the insert member 10, which cylindrical surface 25 is a cylindrical surface located between the flange 8 and the fitting section 1o.

An annular groove 26 is provided near the front end of the socket member 2, and the retaining ring 3 is fitted into the annular groove. The partition wall has an outer diameter dw.

Therefore, the outer diameter dw of the partition wall is smaller than the base diameter dH of the annular groove 26.

The retaining ring 3 is a plastic injection molded product and is integrally molded. The retaining ring 3 has a retaining portion 29 when viewed in cross section.
(Divided into a fin portion 3o and a lock portion 31.The holding portion 29 has a cylindrical outer circumferential wall 32 with a diameter axis.The lock portion 31 has a flat front end surface 31a. , for cooperating with the front wall 14a of the annular groove 14 of the insert member l.The locking part 31 is also provided with a conical surface 31b, which converges toward the front and forms an introduction slope. (The inner diameter dE of the constriction part 30 is smaller than the outer diameter dw of the partition wall 28. A groove 33 is provided along the constriction part 30 between the holding part 29 and the lock part 31. The width of the rib portion 31 is approximately equal to the thickness of the partition wall 28. The rod portion 31 as a whole has a shape that converges toward the front, that is, toward the front end surface 31a.

The smallest diameter portion of the retaining ring 3 has an inner diameter d. The insert 1 has a diameter da immediately below the annular groove 14;
The diameter is equal to the diameter of the mating section 10. The diameter may be slightly smaller than the diameter of the mating section 10, but it should never be
It shouldn't be.

The retaining ring 3 has one radial slit 34 and three weakening notches 35 which completely cut through the retaining ring.
, 36.37.

As can be seen from FIG. 3, the lock portion 31 and the constriction portion 30 of the retaining ring 3 are cut by the weakened notch 36, but this weakened notch does not extend to the retaining portion 29. In short, the radial slit 34 and the weakening notches 35, 36.
37 divides the retaining ring 3 in the area of its locking part 31 into four segments 38, 39, 40, 41. These segments have thin walls (fins 30
Since it is only connected to the holding portion 29 via a chisel, it can be bent outward relatively easily.

The Cassisy working formula of the first embodiment is as follows. First, the socket member 2 is screwed into the female threaded hole 42 of the connecting body. This female screw hole may be a standard hole. By the screwing, the .xi. fitting 22 comes into contact with the upper surface 4a of the connecting body 4 and seals it. Of course, the retaining ring 3 is connected to the socket member 2 before the socket member 2 is screwed in.

This connection takes place by expanding the retaining ring 3, which can be easily widened or expanded by cutting the retaining ring 3 with the radial slits 24. After the expansion, the retaining ring is fitted along the outer diameter dw of the partition wall 28. Due to the inherent elasticity of the retaining ring 3, the retaining part 29 snaps into the annular groove 26. The diameter dH of the cylindrical outer peripheral wall of the holding part 290 is the inner diameter d□ of the female screw hole 42
Since the holding portion 29 is smaller than the holding portion 29, the holding portion 29 does not prevent the socket member 2 from being screwed in.

Once the socket member 2 has been screwed in, the insert member 1 can then be attached to the socket member 2 by a simple insertion fit. The sealing ring 9.13 is securely held on the insert 1. When inserting the plug-in part 1 into the socket part 2, the alignment of the fitting section 10 with the cylindrical bore 11 is determined by the conical surface 15 of the plug-in part 10 and the conical surface 43 provided on the socket part 2.
It is made easier by The conical surface 15 of the insert 10 abuts the conical surface 31b of the retaining ring 30 and the two segments 38 , 39 .

40, 41 is bent open (thereby the retaining ring 3 is expanded. However, the retaining ring 3 cannot be expanded to the extent that it disengages from the annular groove 26.

This is because the diameter dH of the cylindrical outer peripheral wall of the retaining ring 30 and the inner diameter dG of the internal threaded hole are matched with each other, and as long as the socket member 2 is screwed into the internal threaded hole 42, the retaining ring 30
This is because they can only expand slightly (or in some cases, not at all).

When the insert 1 is fully inserted, the segment 38
~41 is locked in the annular groove 14.

In this state, the seal ring 9 is compressed.

Even after the plug-in part 1 is released, it remains fixedly locked, with the elastic action of the sealing ring 9 pushing the plug-in part 1 upwards as seen in FIG. .

Due to this compression, the front wall 14a of the annular groove 14 is fixedly pressed against the front end surface 31a of the retaining ring δ. This provides an absolutely rock-free seating, which is also favorable for the sealing ring 130 function.

The coupler can only be removed by unscrewing the socket member 2. In the unscrewed state, there is no longer any obstacle to the expansion of the retaining ring 3, so that the retaining ring can be expanded enough to pull out the segments 38-41 from the annular groove 14.

In the right half of FIG. 1, a connection hole is shown, such as is used for a screw connection. This connection hole has a hole bottom 42a. However, the coupler of the invention is also suitable for screwing into relatively thin walls 44. However, even though it is a thin wall, the wall 44 must have a small wall thickness S such that the holding portion 29 of the holding ring 3 can be supported by the wall of the female threaded hole.

The insert member 1 can be rotated relative to the socket member 2 even after connection. This is particularly advantageous if the insert is configured in the form of a chevron. Of course, such a configuration also falls within the scope of the present invention.

In the second embodiment shown in FIGS. 4 to 6, the upper (first
The nature of the sealing ring (corresponding to sealing ring 9 in the figures) and the mounting of the retaining ring differ from the first embodiment of FIGS. 1 to 3 in terms of type. The sealing ring 50, which is shown in the tensioned state in FIG. 4, has a rectangular cross-section in the relaxed state. When insert member S1 is inserted, the seal ring is slightly upset and assumes the shape shown in FIG.

Seal ring 50 engages a recess generally designated 51 . This recessed portion 51 has a flat bottom 51a, a hollow cylindrical portion 51b, and a hollow conical portion 51c. The diameter of the flat bottom 51a is designed such that the outer surface of the seal ring 50 is in contact with the cylindrical wall. The inner wall of the seal ring 50 is in contact with the cylindrical outer peripheral surface 52 of the insert member S1.

Another difference from the first embodiment shown in FIGS. 1 to 3 is that the contact surface 53a of the seal ring 5o is formed by a flange 53, and the flange has a spanner fitting surface 53b, for example. It is constructed as a hexagonal surface. The advantage of this configuration is that the insert member S1 can be held fixed when the socket member A1 is unscrewed. By doing this, twisting of the hose 54 can be avoided.

The retaining ring, generally designated H1, has on its inside a total of four projections 55-58, which project inwardly. The protrusion is provided on the socket member A.
It engages two holes 59 which completely pass through the socket member wall, which is reduced in diameter at this location. This configuration provides the advantage that the inner diameter dL of the insert member S1 can be increased compared to the first embodiment shown in FIGS. 1 to 3. This enlarged diameter effect results from the fact that, in the embodiment of FIGS. 1 to 3, the wall thickness that must remain in the inner region of the base of the annular groove 26 is saved.

In the third embodiment shown in FIGS. 7 to 9, S2 is an insert member, A2 is a socket member, and H2 is a retaining ring member.

This embodiment differs from the embodiments shown in FIGS. 4 to 6 in terms of the type of attachment of the retaining ring H2. The retaining ring H2 has four tangential webs 60-63 on its inside. These webs have flat surfaces 60a-63a, and the flat surfaces of adjacent webs lie at right angles to each other. In short, the Φ webs are shifted by 90 degrees from each other.

The socket member A2 is provided with corresponding grooves 64 into which the webs 60 to 63 fit.

This configuration also allows the inner diameter dL of the insertion member s2 to be relatively thick. This is because the straight corresponding groove 64 can extend almost to the vicinity of the inner diameter part of the socket member A2. This is because the corresponding groove 64
This is because sufficient material remains in the area between the corresponding grooves 64 to ensure a bond between the socket member area located below the corresponding groove and the socket member area located above the corresponding groove.

In the fourth embodiment shown in FIGS. 10 to 12, S3 is an insert member, A3 is a socket member, and H3 is a retaining ring. The fourth embodiment also differs from the second and third embodiments shown in FIGS. 4 to 9 in terms of the type of attachment of the retaining ring H3. The retaining ring H3 has three grooves 65 and 66 on its inside.
．． 67. These grooves as a whole form a serrated cross-sectional shape, and the tooth tips of the serrations are designed such that although it is easy to fit the retaining ring H3 into the socket member A3, it is difficult to pull out the retaining ring. Alternatively, it is oriented such that the retaining ring H3 can only be removed by cutting the retaining ring.

The socket member A3 is attached to the grooves 65 and 66 of the retaining ring H3.
and 67 have corresponding grooves 68, 69, 70 which mesh with teeth 71, 72, 73 formed by. The teeth are
Corresponding grooves 68, 69.

It acts as a counter hook to the 70's.

The retaining ring H3 is completely closed both at the front and at the rear. In the area of one radial slot 74 a weakened bonding web 75 is provided which is configured as a reference break point. If it is necessary to remove retaining ring H3,
By cutting the weakened connecting web 75, the retaining ring is cut open and expanded for removal. Compatible groove 68
．． If 69.70 is shallow as shown, it is impossible to reuse the retaining ring H3. In other words, in this case, the supporting action of the retaining ring H3 on the hole wall of the female threaded hole is due to the tooth 71.
．． It is no longer sufficient to ensure the engagement between 72.73 and the corresponding groove 68.69.70.

The fourth embodiment shown in Figs. 10 to 12 also provides a relatively large inner diameter (]L. This is because the axial holding force is distributed among the plurality of corresponding grooves 68, 69, 70. This is because the corresponding grooves can be formed extremely shallow.

In the fifth embodiment shown in FIGS. 13 to 15, S4 is an insert member, A4 is a socket member, and H4 is a retaining ring. The retaining ring H4 is made of a thin metal plate and has a locking portion formed by two pawls 71' and 72' located diametrically opposite to each other. Both claws are one holding part 7
3'. As can be seen in FIG. 15, the pawls 71', 72' have a conical portion 77 extending from the retaining portion 73' and a cylindrical end portion 78.

In the connected state, the end face 78a of the cylindrical end portion 78 is in contact with the front end of the annular groove of the insert S4.

The circumferential angle α1□ is significantly smaller than 360°, and in the illustrated example is 225°. The retaining ring H4 has a claw 71'.

72' ends at end faces 71a and 72a.

Also in the embodiments shown in FIGS. 13 to 15, the socket member A4
By contacting the retaining portion 73' with the wall of the female threaded hole 74' into which the retaining ring H4 is screwed, an undesired radial expansion of the retaining ring H4 is prevented.

Further, in this fifth embodiment, an elastic seal ring 75 is provided upwardly.
', and the cross section in the relaxed state is also rectangular. In the tightened state in which the sealing ring 75' exerts an axial force, the sealing ring 75' is pressed into the throat portion 76 provided on the insert S4. In short, unlike the second to fourth embodiments, the seal ring 75' in this embodiment bulges inward.

In the sixth embodiment shown in FIG. 16, S5 is an insert member, and A
5 is a socket member, and H5 is a retaining ring. In this case as well, the retaining ring H5 is made of a thin metal plate, but differs from the retaining ring H4 of the fifth embodiment in that the cylindrical end portion 78 is not present and the locking portion extends conically to the end. . In FIG. 16, said conical portion is designated by the reference numeral 79. In the connected state, the inner surface of this conical portion 79 is in contact with the conical bottom surface 80 of the annular groove 810 of the insert S5. Angle γ between the conical surface of the bottom surface 80 and the coupler axis 82
is approximately 20°. By pressing together the conical bottom surface 80 of the annular groove 81 and the conical section 79 of the retaining ring H5, the plug-in part S5 is fixed parallel to the coupler axis 82 in both axial directions. Therefore, there is no need to provide a special mechanism for tightening in the axial direction. Therefore, the upper seal ring 8
3 is not compressed axially at all or to that extent.

[Brief explanation of the drawing]

FIG. 18 is a diametrical cross-sectional view of a coupler according to an embodiment of the present invention in which a retaining ring is held in an annular groove of a socket member, and FIG. 2 is slightly enlarged compared to FIG. Figure 3 is a diametrical cross-sectional view of the retaining ring taken along the line ■-■ in Figure 2; Figure 4 is a diametrical cross-sectional view of the retaining ring taken in the direction of the arrow FIG. 4a is a diametrical cross-sectional view of a coupler according to a second embodiment of the present invention in which the coupler is engaged by a projection, and the arrow ■a in FIG.
FIG. 5 is a plan view of the retaining ring used in the embodiment shown in FIG. 4; FIG. 6 is a plan view of the retaining ring taken along line Vl-■ in FIG. 7 is a longitudinal sectional view of a coupler according to a third embodiment of the invention in which the retaining ring is retained in the socket member by means of tangential webs; FIG. 8 is a retainer used in the embodiment shown in FIG. 7; A plan view of the ring, FIG. 9 is a sectional view of the retaining ring taken along the line ■-IX in FIG. 8, and FIG. 10 is a fourth embodiment of the present invention in which the retaining ring is held by a plurality of grooves in the socket member. FIG. 11 is a plan view of the retaining ring used in the embodiment shown in FIG.
1 is a sectional view of the retaining ring taken along the line ■-■ in FIG. 1; FIG. 13 is a diametrical sectional view of a coupler according to a fifth embodiment of the present invention having a retaining ring made of thin metal sheet; and FIG. FIG. 15 is a sectional view of the retaining ring taken along line W-W in FIG. 14, and FIG. 16 is a plan view of the retaining ring used in the embodiment shown in FIG. FIG. 6 is a diametrical cross-sectional view of a coupler according to a sixth embodiment of the present invention; ■...Insert member, 2...Socket member, 3...
Retaining ring, cow... connection body, 4a... top surface, 5...
- Tubular protrusion, 6... Hose, 7... Circumferential fin, 8... Flange, 8a... Lower surface, 9... Seal ring, 10... Fitting section, loa... Cylinder outer peripheral surface,
11... Cylindrical hole, 12... Annular groove, 13... Seal ring,
14... annular groove, 14. a... Front wall, 15 = 1 conical surface, ], 6... End surface, 17... Through hole, 18...
・Threaded section, 19... Male thread, 20... Flange,
20a...Outer peripheral surface, 20b...Bottom surface, 21...Annular groove, 22...Packing, 23...End surface, 24...Concave portion, 24a...Bottom surface, 24b...Surrounding surface , 25...
・Cylindrical surface, 26.. Annular groove, 27.. Front end surface, 28..
・Partition wall, 29... Holding part, 30... Constriction part, 31...
・Lock part, 31a... Front end surface, 31b... Conical surface, 32... Cylindrical outer peripheral wall, 33... Groove, 34... Radial slit, 35, 36° 37... Weakening notch, 38'
, 39.40.41... Segment, 42... Female screw hole, 428... Taisei, (IW/bulkhead outer diameter, d...
・Annular groove base diameter, dH...Diameter of cylindrical outer peripheral wall, do
...Inner diameter of the constriction part, d work...Inner diameter of the smallest diameter part,
da...Diameter just below the annular groove of the insert member, do...
Inner diameter of female screw hole, 43...conical surface, 44...wall, S
- Wall thickness, SI... Insert member, 50... Seal ring, 51... Recessed part, 51, a... Flat bottom, 51
b...Hollow cylindrical part, 51c...Hollow conical part, 5
2... Cylindrical outer peripheral surface, 53... Tsuba, 53a... 1J5
3b...Spanner fitting surface, 54...Hose, A1...Socket member, H...Retaining ring, 55.56°57
．． 58... Protrusion, 59... Hole, discharge... Inner diameter of insert member, S2... Insert member, A2... Socket member, H2... Retaining ring, 60, 61, 62, 6δ...
・Web, 60a, 61a, 62a, 63a...
・Flat surface, 64...corresponding groove, S3...insertion member,
A3...Socket member, H3...Retaining ring, 65
．． 66.67...Groove, 68,69.70...Corresponding groove, 71°72,. 73... Teeth, 74... Radial slit, 75... Weakening connection web, S4... Insert member, N... Socket member, H4... Retaining ring,
71', 72'...claws, 71a, '72a...
End face, 73'... Holding part, 74'... Female thread C hole, 7
5'... Seal ring, 76... Throat part, 77
... Conical portion, 78... Cylindrical end portion, 78a.
... End face, α ... Circumferential angle, S5 ... Insert member, A
, ... socket member, H5 ... retaining ring, 79.
... Conical part, 80 ... Conical bottom surface of annular groove, 81.
...Annular groove, 82...Coupler axis, γ...Angle between coupler axis and conical surface, 83...Seal ring rr"'n -535

Claims (1)

[Claims] 1. A coupler for connecting a pressurized air conduit to an air brake mechanism of an automobile, in particular, comprising an insertion member having a central through hole, a male thread screwed into a female threaded hole of a connecting body, and It consists of a socket member having a through hole and an elastically expandable retaining ring, the retaining ring engaging the insert member and the socket member to fix the relative positions of both members in the axial direction. type, the socket member (
2, AI + A2 +A,, A4. A5), an annular groove (2
6) Inside the retaining ring (3, H1+ 821 H31H4
1H5) are engaged and the expansion of the retaining ring is limited by the contact between the retaining part (29, 73') of the retaining ring and the wall of the female threaded hole (42, 74') of the connecting body. and the retaining ring (3°H,, H2, H3, H4,
H5) is the socket member 2, A1. A2. A3. A
4. The lock part (31; 71', which covers the front end face (27) when viewed in the screwing direction of A5) and is elastically expandable in contrast to the holding part (29, 73'). 7
2'; 79) by the insert member (1+ Sl 132
1S3. An annular groove (14) provided on the outer periphery of S4, 85)
81), and the holding part (29,
73') expansion dimension is the insertion member (1+ 81 +
The annular groove (1
4, 81) lock part (31; 71', 72'; 79
Coupler for pressure conduits, characterized in that the engagement depth is less than that of ). 2. The retaining ring (aeH, ++n5) is attached to the socket member (
2). The coupler according to claim 1, which engages in the outer circumferential annular groove (26) of 2). 3. The retaining ring has individual projections, each projection engaging a respective recess in the socket member.
Coupler described in section. 4. The recesses are four holes (59) provided at an angle of 900 degrees relative to each other so as to completely penetrate the wall of the socket member (A,). coupler. The convex and concave portions are straight grooves (64) and the protrusions are tangential webs (60 to 63), and these webs are 9
4. Couplers according to claim 3, in which a total of four couplers are arranged mutually offset by 0.00. 6. The retaining ring (H3) engages one or more circumferential grooves (68, 69, 70) of the socket member (A3), these circumferential grooves having a serrated cross-sectional shape, 2. A coupler according to claim 1, wherein the tooth tips of the serrations are oriented so as to act in an inverted hook-like manner to prevent the retaining ring (H3) from falling out. 7. Retaining ring (3+ Hl + H2+ H3+ H
4+H5) is equal to or slightly smaller than the inner diameter (dG) of the female threaded hole (42) of the connecting body (4), The coupler according to any one of item 6. 8. Socket member (2+ Al t A2 + A3
One recess (24, 51) for accommodating an elastic seal ring (9, 50, 75', 83) is arranged at the rear end of +A-4+A5'; The ring is an insert member (1 + 81 + 82 + 83
+ 34. The coupler according to any one of claims 1 to 7, which is in contact with the layered surface (8, 53a) of s5). 9. In the coupled state of the coupler, the elastic sealing ring exerts an axial force on the plug-in member (1+81, s2.s3.s4+S5) to press it against the retaining ring. Couplers listed. 10. Elastic sealing ring (50, 75', 83
) has a rectangular cross section in the relaxed state, and the recess (51) has a hollow cylindrical portion (51b) in which the sealing ring (50, 75', 83
10. Coupler according to claim 9, in which the sealing rings are fitted and the inner surface of the sealing ring is in contact with the plug-in member (s, +54185). ] 1. The hollow cylindrical part (51b) transitions into an outwardly expanding hollow conical part (51c), and the elastic sealing ring (50) is tightened in said hollow conical part (51c).
), the coupler according to claim 10. 12, Insert member (Sl, S2 +""', 84
, s5), the shoulder-like surface (53a) is formed by a tsuba (53), which is the socket member (A, , A, , ,
A3゜A41A5) overhanging and hexagonal shape ξ
Claim 9 has a fitting surface (53b).
The coupler according to any one of items 1 to 11. 13, Retaining ring (3, H,, H2, H3, H4, H5
) and/or insert member (1+ Sl + 82 +
13. The coupler according to claim 1, wherein the front end of S3+H34°35) is provided with a conical surface (31b, 15) that converges toward the front. 1+, retaining ring (3+ Hl + H2+ H3+
H4 + H5) has a bent cross section, the rear part of the cross section, that is, the holding part (29) has a cylindrical outer peripheral wall (32), and the diameter of the cylindrical outer peripheral wall corresponds to the outer diameter (dH). , the front part of the cross section, that is, the locking part (31) converges toward the front with respect to the axis of the retaining ring (31Hl, H2, H3), and the retaining part (29) and the locking part (31) 8. A coupler as claimed in claim 7, in which the two parts are connected to each other via a thin-walled constriction (30). ■5. Coupler according to any one of claims 1 to 14, characterized in that the retaining ring (3, Hl, H2) has one radial slint (34) separating it. . 16. The coupler according to any one of claims 1 to 14, wherein the retaining ring (H3) has a reference breaking point (75). 17. The retaining ring (3+Hl+H2+H3) has a plurality of weakening notches (35, 36,'37). These weakening notches divide the locking portion (31) of the retaining ring into a plurality of segments (38, 39, 40, 41)K, and the weakening notches (35, 36, 37) 17. A coupler according to any one of claims 1 to 16, characterized in that the constriction (30) connected to the (30) is also divided. 18. The coupler according to any one of claims 1 to 17, wherein the retaining ring (3+ Hl, H21H3) is an injection molded article made of a copolymer of polymethyleneoxy 1. 19. Coupler according to any one of claims 1 to 17, wherein the retaining ring (H4, H5) consists of a metal, such as spring bronze or stainless steel. 20. The coupler according to claim 19, wherein the retaining ring (H4, Hs) consists of a sheet metal. 21. Patent in which the locking part consists of two pawls (71', 72') located diametrically opposite each other and in which a retaining ring (H41H5) terminates in said pawls (71', 72'). A coupler according to claim 19 or 20. 22 The retaining ring (H41H5) spans an angular range of 1900 to 250°, measured at its outer circumference;
The coupler according to claim 21, wherein the locking portion of the retaining ring (1(5)) is engaged in the outer circumferential annular groove (81) of the insert member (S5) in the axial direction, and The coupler 〇 24 according to any one of claims 1 to 22, which fixes the member in position in both axial directions, the bottom surface ( 24. The coupler according to claim 23, wherein the conical bottom surface (80) converges toward the front in a conical shape. 25. The angle (γ) between the conical bottom surface (80) and the coupler axis (82) is 15. 25. The coupler of claim 24, wherein the angle is between 30° and 30°.