WO2018210552A1

WO2018210552A1 - Coupling device

Info

Publication number: WO2018210552A1
Application number: PCT/EP2018/060870
Authority: WO
Inventors: Patrick PFEIL
Original assignee: Eisele Pneumatics Gmbh & Co. Kg
Priority date: 2017-05-16
Filing date: 2018-04-27
Publication date: 2018-11-22
Also published as: DE102017004716A1

Abstract

The invention relates to a coupling device, consisting of at least two couplable coupling units (1, 13) which permit a transport of media along a media path (9, 87) inside same in the completely coupled state, and block this in the completely decoupled state, characterised in that at least two interlocking units (21, 49; 66, 69) are provided, of which one secures one coupling unit (1) to the other (13) and permits a ventilating of at least one part of the blocked media path (9, 87) in relation to the environment in a partially coupled state, and the other interlocking unit (66, 69) prevents the ventilating with the release of the media path (9, 87) in the completely coupled state.

Description

coupling device

The invention relates to a coupling device consisting of at least two detachable coupling devices that allow in the fully coupled state media transport along a media path in its interior and lock in completely uncoupled state this.

Coupling devices of this kind are state of the art. As so-called quick-change connectors, these coupling devices make it possible to establish or release connection connections between flexible lines leading to a point of consumption and a respective pressure supply system, wherein the connections can be produced and released under system pressure. In the art, these devices are preferably used in piping systems that carry liquids or working gases, such as compressed air. In piping systems operating under high pressure media, as is normally the case with compressed air systems, the use of known coupling devices is problematic. Despite the blocking of the media path in the uncoupled state, when the coupling parts are disconnected under high pressure, a sudden pressure reduction occurs in the line leading to the point of consumption. Section through jerky and thus safety end of ejecting media volume from this line section.

In view of this problem, the invention has the object to provide a coupling device of the type mentioned is available, which is characterized by a safe performance even when used in high-pressure media.

According to the invention this object is achieved by a coupling device having the features of claim 1 in its entirety.

According to the characterizing part of claim 1, an essential feature of the invention is that at least two locking devices are provided, one of which, in a partially coupled state, which defines one coupling device on the other and a vent of at least a portion of the blocked media path relative to the Enables environment and the other locking device in the fully coupled state with release of the media path prevents the vent. While the known coupling devices are transferable in their operation seamlessly from locked together, coupled state in the uncoupled state, the existing in the present invention additional locking device provides a teilgekuppelten intermediate state that allows venting leading to the point of use media path before the device in the completely decoupled state passes, in which the coupling devices are released. The internal venting of the media path leading to the point of use can be designed in such a way that pressure reduction to the environment is not hazardous. In advantageous embodiments, the respective locking device has at least one latching part guided in a receiving part, which passes under the action of a control part when actuated from an unlocked to a latched state and vice versa, wherein in the latched state, the respective latching part passes into a receiving groove of the respectively assignable coupling device such that the latching part defines its receiving part on the associated coupling device.

The arrangement can be made with advantage so that the respective control part consists of a sleeve, of which a sleeve is guided on a part of its length within the other sleeve längsverfahrbar, which in turn is guided longitudinally movable on the other coupling device. Both sleeves can be gripped on the outside of the device by the operator and moved for the clutch actuation.

Both longitudinally movable control parts are each supported against an energy storage, in the embodiment in the form of a compression spring, from, wherein the respective control part has a control guide on which the respectively assignable locking part is supported.

Advantageously, the respective locking part is formed from a detent ball which is rotatably guided in ball mounts of the assignable receiving part.

With particular advantage, the arrangement is such that for a uncoupling both control parts in the same direction but in time succession manually operated and that for a coupling pelvorgang the longitudinal process of one coupling device relative to the other in opposite directions such that the both locking devices are locked in temporal succession.

In advantageous embodiments, the receiving part is provided with the respective other locking part with a locking part, which in the locked state of the media path to form a seal in contact with a stationary within the other coupling device arranged valve seat, wherein in the released state of the media path, the locking member lifts from the valve seat, as soon as the receiving part is moved with the other locking part by means of the associated control part in its locking position in an intermediate part of the other coupling device, which the valve seat wearing.

For this locking position, the intermediate part has a receiving groove for the further locking part, wherein between the intermediate part and the locking part, a further energy storage is arranged, which exerts a force on the locking part in the direction of the valve seat.

For venting a venting device is provided with a sealing ring which is arranged between the intermediate part and the receiving part with the further latching part and the partially coupled state produces a media-leading connection between the obstructed media path and the environment via a venting path and in the fully coupled state at sealing system with the intermediate part and released media path blocks the vent line. In this case, the passage of the vent section can be designed such that the pressure reduction during the venting process takes place safely.

Advantageously, the arrangement can be made such that the venting section extends through a filter chamber with the further energy storage device, via the intermediate part, via the receiving part of the further latching part and via the further control part to the environment.

The receiving part with the further locking part moves in its return movement in the direction of the one coupling device to in a receiving space which is bounded by the intermediate part and the other control part with. With regard to the design of the check valve, the arrangement may advantageously be made so that the valve seat along a slanted guide has a sealing ring on which in the locked state of the media path a sealing surface of the locking part applies, which has a lower inclination than the oblique guide of the valve seat. In the blocking state, the contact between the blocking part and the valve seat thereby takes place on a sealing line formed by the sealing ring, so that a particularly secure blocking behavior is ensured even at high media pressure by high surface pressure. In advantageous embodiments, when inserting the first coupling device comes at the free end-side end, which engages in the other coupling device for the coupling process, in contact with a sliding piece, which moves against the force of another, fourth energy storage when coupling in the direction of the intermediate part. This energy storage, in the example in the form of a compression spring, ensures that the locking takes place without play by means of the associated first locking device.

Advantageously, at the one free end face of the sliding piece, which points in the direction of a coupling device, another sealing ring is arranged, which is supported on a locking ring which carries the respective locking part of a receiving part in the unlocked state of a coupling device. The invention with reference to an embodiment shown in the drawing is explained in detail.

1 shows the exemplary embodiment of the coupling device according to the invention in half-side in longitudinal section and half-sided in side view. tenansicht shown illustration, wherein the vol fully decoupled state is dargestel lt;

Fig. 2 is a representation corresponding to Figure 1, wherein the teilgekuppelte state is shown. and

Fig. 3 shows a corresponding presen- tation, wherein the fully coupled state is shown.

In the drawing, the embodiment of the coupling device according to the invention in about a practical embodiment dargestel lt dargestel lt. In the drawing l inksseitig located first coupling part 1 has the form of a nipple-like plug-in part with an outer head part 3 in the form of an external hexagon and a to this adjoining shank 5. From the head part 3 to the end 7 of the shaft 5 extends a coaxial through-hole 9, which is widened in the head part 3 and provided with an internal thread 11 for the connection of a line which leads to a relevant consumption point leads and is formed for example by a pressure-resistant hose. A right in the drawing located second coupling device 1 3 has the form of a G curl, whose non-circular jacket 1 5 merges into a connecting piece 1 7 forming the outer end with an external thread 1. When connecting the nozzle 1 7 to a pressure supply system, the interior of the G curl of the second coupling device 1 3 forms the inflow space for the relevant medium.

The input for the insertion of the shaft 5 of the first coupling device 1 is formed by a receiving part 21 in the form of an annular body, which is formed both on its outer diameter and on its inside diameter. graded. With its stepped, outer Zyl indermantelflächen 23 and 25, the receiving part 21 forms the sliding guide for a first control part 27 in the form of a sleeve which is ebenfal ls stepped on the outside and inside. On the control part 27 an in the drawing l gelege ner, the largest outer diameter exhibiting longitudinal portion with a Ril ment 29 is provided, and a right after ießender, reduced in outer diameter longitudinal portion 31 has the shape of a cylinder jacket surface. The further part of the outside of the coupling device which adjoins the first control part 27 is formed by a second control part 33, which likewise has the shape of a sleeve, which, like the first control part 27, can be moved longitudinally and, like the first control part 27, On the outside on a central longitudinal section ebenfal ls with a manuel le method facilitating Ril ment 35 is provided. For a movement, the second control part 33 is guided with its right-hand end portion on an outer diameter tapered guide portion 37 of the second coupling means 1 3, and the l inks located end portion of the second control part 33 is guided on the first control part 27, with its tapered longitudinal portion 31st in turn guided in the sleeve of the second control part 33. The first control part 27 is biased by a compression spring 45 and the second control part 33 by a second compression spring 47 each for a movement in the drawing to l inks.

The shaft 5 of the first coupling part 1 has, following its head part 3, a first longitudinal section 39, which is guided in the front part of the receiving part 21. At this longitudinal section, a recessed receiving groove 41 abuts, which in turn is followed by a diameter-reduced end portion 43, which extends to the end 7 of the shaft 5. The receiving part 21, together with locking parts and the shank 5 of the first coupling device 1 located receiving groove 41 forms a first Verriege- Lung device, which can be converted by the first control part 27 in a locked state in which it determines the coupling device 1.

As latching parts 21 detent balls 49 are provided in the receiving part, which are rotatably mounted in bores formed by bores 51 of the receiving part 21, wherein on the circumference of the receiving part 21 four ball retainers 51 are provided with a detent ball 49. When not inserted into the receiving part 21 first coupling means 1 or only partially inserted first coupling means 1, as shown in Fig. 1, the locking balls 49 are secured against exiting the ball seats 51 inwardly by a locking ring 53. This is in the uncoupled state shown in Fig. 1 by the force of a third compression spring positively held on a stop forming a shoulder 57 of the receiving part 21. For this purpose, the compression spring 55 acts on a sliding ring 59 on which a seat for a sealing ring 61 is located, via which the spring force is in turn transmitted to the locking ring 53.

If the first clutch device 1 is pressed from the disengaged position shown in Fig. 1 in the position shown in Fig. 2, which corresponds to the partially coupled state, then shifts the shaft 5 with a between the receiving groove 41 and the tapered end portion 43 located

Ramp 63 the locking ring 51 together with the sealing ring 61 and the sliding ring 49 against the force of the compression spring 55. The detent balls 49 are thus free to form the latching with the receiving groove 41 of the shaft 5. This latching operation is carried out by control means of the first control part 27, which has on the inside in the region of the groove 29 an obliquely extending control guide 63, in the traversing movement of the control member 27 in the drawing to the left, under the action of the biasing force of the compression spring 55 which controls the detent balls 49 in the receiving groove 41.

This state of latching of the first clutch device 1 is shown in FIGS. 2 and 3. A second receiving part 65 forms part of a second locking device and, like the first receiving part 21, has ball retainers 67 for detent balls 69, to which a receiving groove 71 is assigned in order to form a catch. This is located in a stationary intermediate part 73 which, with its end region 74 facing the first coupling device 1, forms a part of the movement control of the second control part 33 with a circumferential section 75. The end region 76 of the intermediate part 73 facing the second coupling device 1 3 forms the valve seat 77 for the valve which, in the uncoupled or partially coupled state, blocks the fluid flow and releases it in the fully coupled state shown in FIG. 3. This valve has for cooperation with the valve seat 77 on a locking member 79 which is fixed by means of a snap ring 81 on the second receiving part 65 and with its remote from the second receiving part 65 end 83 rests against the bell of the second coupling device 1 3.

By a fourth compression spring 85, the locking member 79 and with it the second receiving part 65 in the valve-locking position, s. Fig. 1 and 2, biased. The fourth compression spring 85 is in a spring chamber 87 between see the locking part 79 and a shoulder of the intermediate part 73 clamped. The surface of the valve seat 77 facing the blocking part 79 has a sealing ring 91 along an inclined surface 89 (FIG. 3). The inclination of the inclined surface 89 has a different inclination relative to the direction of travel than the facing surface of the movable blocking part 79, so that in the locked state of the valve (FIGS. 1 and 2), the blocking part 79 at

Closed state rests only on the sealing ring 91 along a sealing line. The second receiving part 65 has in its connected to the locking part 79 an external thread 94 with which it is bolted to the second coupling means 1 3 via an associated internal thread, which is located on the inside of the opening edge of the bell-shaped second coupling means 1 3. The second receiving part 65 forms on the one hand by the interaction of the detent balls 69 with the receiving groove 71 in the intermediate part 73, the second locking means, the second with its locking member 79, the actuating element for the check valve and forms the third and a part of the venting device. For this purpose, the receiving part 65 in an offset from the ball seats 67 in the direction of the second coupling device 1 3 arrangement, an inner annular groove 93 with a sealing ring 95. In the fully uncoupled state shown in Fig. 1 and in the partially coupled state shown in Fig. 2, the sealing ring 95 is in each case in the region of a recessed portion 97 of the intermediate part 73 which is adjacent to the spring chamber 87, so that the sealing ring 95 is not a seal between the spring chamber 87 and a housing located on the inside of the sleeve of the second control part 33 receiving space 99 which forms the free space for the movement of the receiving part 65. In the state of FIGS. 1 and 2, at least one venting path is thereby formed from the inner media guide via the spring chamber 87, via the intermediate part 73, via the receiving part 65, via the receiving space 99 and the second control part 33 to the environment.

Starting from the state shown in FIG. 1, for a coupling process, the first coupling device 1 against the force of the compression spring 55, via the Verschiebering 59 on the end 7 of the shaft 5 of the coupling device 1 and on the sealing ring 61 and the locking ring 53 a acts, pressed inward, with locking ring 53 and sealing ring 61 are moved with. As soon as the detent balls 49 come into the region of the receiving groove 41, the first control part 27, which is prestressed by the compression spring 45, controls the detent balls 49 in FIG. 1, to the left, in the movement caused by the compression spring 45 the receiving groove 41, so that the shown in Fig. 2, partially coupled state is reached. The valve is not locked in the second Locking device locked, and the venting device is in the venting state. In order to bring the device from this partially coupled state into the fully coupled state, the first clutch device 1 and the second clutch device 1 3 are pressed against each other. About the screw on the internal thread 94 while the second receiving part 65 is moved, as well as the second control part 33, which is moved by contact with a shoulder 1 6 on the jacket 15 of the coupling device 1 3. As soon as the detent balls 69 of the receiving part 65 reach the area of the receiving groove 71, the second control part 33, which shifts by the force of the compression spring 47, controls the detent balls 69 into the detent engagement with the receiving groove 71 by means of its control guide 36. In this axial position of the receiving part 65 shown in FIG. 3, the sealing ring 95 is no longer located within the recessed portion 97 of the intermediate part 73, but in sealing engagement on the non-recessed portion of the intermediate part 73, so that the venting path is closed. At the same time in this axial position, the locking member 79 is lifted from the valve seat 77, so that the media passage is free. In order to transfer the device from the fully coupled state to the uncoupled state, the second control part 33 is displaced against the force of the compression spring 47 from the position shown in Fig. 3 in the position shown in Fig. 2. The latching of the second locking device is thereby canceled, so that the detent balls 69 emerge from the receiving groove 71. Since the receiving groove 71 is limited by inclined surfaces, a control guide 72 is formed, which controls the detent balls 69 from the latching engagement under the action of the receiving part 65 biasing compression spring, so that the device in the partially coupled state of Fig. 2 passes, in which the Force of the compression spring 85 and the locking member 79 clamped to the valve seat 77. In teilgekuppeltem state thereby the media flow is blocked and the venting path is free because of the Sealing ring 95 is again in the region of the recessed portion 97 of the intermediate part 73.

In order to bring the device in the fully decoupled state, the first control member 27 is moved against the force of the spring 45 from the position shown in Fig. 2 to the right. As soon as the detent balls 49 are released, an oblique surface bounding the receiving groove 41 acts as a control guide 42. The compression spring 55 acting on the shaft 5 of the first coupling device 1 thereby controls the detent balls 49 out of engagement by means of the control guide 42 and displaces the first coupling device 1 in the direction of ejection. at the same time the locking ring 53 reaches the position shown in Fig. 1, in which it secures the detent balls 49 in their ball seat 51 when the first coupling device 1 is removed. As a result, the first locking device also forms the securing of the device against opening of the check valve before the device is transferred from the decoupled state of Fig. 1 in the partially coupled state of Fig. 2. As long as the detent balls 49 secured in the ball seats 51 and the first coupling device 1 is not connected and locked, the first control part 27 can not move from the position of Fig. 1, so that the second control part 33 and thus the second coupling device 1 third are blocked.

Claims

P a n t a n s p r e c h e

Coupling device, consisting of at least two detachable coupling devices (1, 1 3), in the vol fully coupled state a media transport along a media path (9, 87) in its interior ermölen and in the fully decoupled state lock this, characterized in that at least two Locking means (21, 49, 66, 69) are provided, one of which, in a partially coupled state, defining a coupling device (1) on the other (1 3) and a venting of at least a part of the blocked media path (9, 87) relative to the environment makes it possible and the other locking means (66, 69) in vol fully coupled state under release of the media path (9, 87) prevents the vent.

Coupling device according to Claim 1, characterized in that the respective locking device (21, 49, 66, 69) has at least one latching part (49, 69) guided in a receiving part (21, 66) which, under the action of a control part (27, 33) passes during its actuation from an unlocked to a latched state and vice versa, and that in the latched state, the respective latching part (49, 69) in a receiving groove (41, 71) of each zukomm- coupling device (1, 1 3) arrives that the locking part (49, 69) determines its receiving part (21, 66) on the associated coupling device (1, 1 3).

Coupling device according to claim 1 or 2, characterized in that the respective control part (27, 33) consists of a sleeve, of which a sleeve on a part (31) of its length is guided longitudinally movable within the other sleeve, on the other coupling device (1 3) is guided longitudinally movable.

4. Coupling device according to one of the preceding claims, characterized in that both longitudinally movable control parts (21, 33) are each supported against an energy store (45, 47).

5. Coupling device according to one of the preceding claims, characterized in that the respective ige control part (27, 33) has a control guide (63, 36) on which the respectively assignable locking part (49, 69) is supported.

6. Coupling device according to one of the preceding claims, characterized in that the respective latching part of a detent ball (49, 69) is formed, which is rotatably guided in ball receivers (51, 67) of the assignable receiving part (21, 65).

7. Coupling device according to one of the preceding claims, characterized in that for a decoupling both control parts (27, 33) in the same direction but in time succession manually operated and that for a dome operation, the longitudinal method of a coupling device (1) relative to the Other (1 3) in opposite directions such that the two locking devices (21, 49, 66, 69) are locked in temporal H H serveral succession.

8. Coupling device according to one of the preceding claims, characterized in that the receiving part (65) with the respective other locking part (69) with a locking part (79) is provided, in the locked state of the media path (9, 87) to form a seal in contact with a stationary within the other coupling device (1 3) arranged valve seat (77) and that in the released state of the media path (9, 87) the locking member (79) lifts off the valve seat (77) as soon as the receiving part (65) with the further locking part (69) by means of the associated control part (33) in its latching Stel ment in an intermediate part (73) of the other coupling device (1 3) is moved, which carries the valve seat (77).

9. Coupling device according to one of the preceding claims, characterized in that the intermediate part (73) has a receiving groove (71) for the further latching part (69) and that between the intermediate part (73) and the blocking part (79), a further energy store (85 ) is arranged, which exerts a force on the locking part (79) in the direction of the valve seat (77).

1 0. Coupling device according to one of the preceding claims, characterized in that for the venting a venting device with a sealing ring (95) is provided which is arranged between the intermediate part (73) and the receiving part (65) with the further latching part (69) and in the partially coupled state, a media-leading connection between the obstructed media path (9, 87) and the environment via a vent line manufactures and in the fully coupled state in sealing contact with the intermediate part (73) and released media path (9, 87) the vent line locks.

1 1. Coupling device according to one of the preceding claims, characterized in that the venting section via a spring chamber (87) with the further energy store (85), via the intermediate part (73), via the receiving part (65) of the further locking part

(69) and via the further control part (33) extends to the environment.

1 2. Coupling device according to one of the preceding claims, characterized in that the receiving part (65) with the further latching part (69) during its resetting lbewegung in the direction of a coupling device (1) in a receiving space (99) ver moves, which is limited by the intermediate part (73) and the other control part (33).

13. Coupling device according to one of the preceding claims, characterized in that the valve seat (77) along an inclined surface (89) has a sealing ring (91) on which in the locked state of the media path (9, 87) has a sealing surface of the blocking part (79 ) applies, which has a lower inclination than the inclined surface (89) of the valve seat (77).

14. Coupling device according to one of the preceding claims, characterized in that the one coupling device at its free end face (7), which engages in the other coupling device (13) for the coupling process, comes into contact with a sliding ring (59), the opposite the force effect of a further fourth energy store (55) during coupling in the direction of the intermediate part (73) moves.

15. Coupling device according to one of the preceding claims, characterized in that a further sealing ring (61) is arranged on the one free end face of the displacing ring (59) which points in the direction of the one coupling device (1), which adjoins a blocking ring (61). 53) is supported, which in the unlocked state of a coupling device (1) carries the respective latching part (49) of a receiving part (21).