WO2018210622A1 - Connection device - Google Patents

Abstract

The invention relates to a connection device for at least one fluid-conveying conduit (6), in particular in the form of a compressed air hose, for connection to a connection housing (2) conveying the same fluid, said device having a collet chuck having individual gripper parts (30) which are resiliently movably articulated on a connection part (26) and in their securing position hold the conduit (6), which can be received in the connection housing (2), and by means of a releasing means (34) move into their freeing position to free the conduit (6), said device also having a sealing means (62, 64) by means of which the releasing means (34), when the releasing means is actuated, exerts an actuating force on the collet chuck for movement of the individual gripper parts (30) out of their securing position into their freeing position, characterised in that the sealing means (62, 64) acts on the connection part (26) of the collet chuck and that, when the releasing means (34) is actuated by means of a control means (54, 70, 76) in the connection housing (2), the gripper parts (30) move in the direction of the sealing means (62, 64) from the securing position of the gripper parts into the release position of the gripper parts.

Description

 Eisele Pneumatics GmbH & Co. KG, Hermann-Hess-Strasse 14-1 6, 71 332

Waibl

connection device

The invention relates to a connection device for at least one fluid-carrying line, in particular in the form of a compressed air hose, for connection to a connection housing carrying the same fluid, which has a collet, the individual pliers parts of which are hingedly and movably connected to a connection part. in their Festlegestel ment the recordable in the connection housing line hold and reach by means of a release device in their line releasing release Stel development, and with a sealing device by means of which the release device when actuated an actuating force on the collet for spending the individual pliers parts of their Festlegestel development exercises in their release Stel development.

Connection devices of this type, commonly referred to as plug-in connections with release sleeve and seal are state of the art. By way of example, the Applicant's product publication, entitled "Eisele Basic Line Catalog Program", shows a connection device of this type in the form of angled connection on the catalog page 1 06. Such connection devices permit simple and rapid assembly and disassembly of compressed air hoses without suitable tools depending on the material used in the hoses, for increased working pressures and larger temperature ranges. Based on this prior art, the invention has the object to provide a connection device of the type mentioned, which, while maintaining the advantages of the prior art, characterized by a further improved safety in terms of operation and operation.

According to the invention this object is achieved by a connection device having the features of claim 1 in its entirety. According to the characterizing part of claim 1, a wesentl Ie special feature of the invention is that the sealing device acts on the connecting part of the collet and that the pliers parts by means of a control device in the connection housing upon actuation of the release device in the direction of the sealing device from its fixed position reach into its release position. In the known connection device, the hose is inserted for mounting in the connection housing, while the clamp parts rest under spring force on the hose outside. The retaining claws of the pliers parts thereby generate scratch marks on the outside of the hose, so that, in particular during repeated assembly operations, the structure of the hose is considerably impaired. Since, by means of the control device provided in the invention, when the release device is actuated, the clamp parts reach the release position, the hose can be easily and safely inserted into the front contact position in the connection housing when the release device is actuated, without the clamp parts being controlled in the release position Damage to the hose outside takes place. While in the known solution, the operating force for releasing the collet from the sealing device acts directly on the pliers of the collet, which have a sloping surface for the interaction with the sealing device, both friction and high shear forces arise between pliers parts and sealing device repeated dismantling ge may lead to impairment and / or damage to the sealing device. In the invention, this problem is avoided in that the sealing device acts on the connecting part of the collet, the operating force is thereby transferred as a pure compressive force over flat surfaces and thus no impairment of the sealing device results.

In advantageous embodiments, the control device in the connection housing on a control chamber whose axial extent is dimensioned parallel to the respective displacement direction of the line such that a control part of each assignable pliers part in an end-to-end contact with a boundary wall of the control chamber determines the line and in an opposite end-side conditioning at a further boundary wall of the control chamber releases the line. Advantageously, the arrangement can be made such that the respective control parts for the opposite end systems a first control slope, which brings with increasing investment with a first guide slope on the other boundary wall of the control chamber each assignable Zangenteil against its spring tension in the release position, and have a second control slope, which brings with the progress of investment with the first boundary wall the respectively assignable pliers part in the specified position. While in the known device, the pliers parts are biased only by their spring force in the fixed position, in the invention, the pliers are forced by the interaction with the first boundary wall of the control chamber forcibly in the Festlegestellung so that the hose secured in the assembled state with reinforced holding force is.

In advantageous exemplary embodiments, the first and further boundary walls of the control chamber extend transversely to the direction of travel of the line, the first boundary wall extending to form the second guiding wall. has an oblique tapered annular surface which shortens the length of the control chamber in the direction of the longitudinal axis of a receiving channel for the line.

With particular advantage, the inclination of the first guide slope of the boundary wall of the control chamber, seen in the direction of the line, be chosen lower than the inclination of the first control slope of the respective control part, so that a line contact between the first guide slope and the first control slope is ermögl light. The resulting reduction in friction leads to a reduction in the actuation force which is to be applied when the release device is actuated, so that disassembly operations can take place without high loading of the sealing device.

For the secure determination of the line in the assembled state schl ießt in extension of the first control slope of the respective control parts in each case an engagement lug, which project, starting from the control part, in the direction of the receiving channel for the line within the terminal housing and the progress of investment of the second control slope engage firmly fixing at the second guide slope in the line.

The connection housing is formed in advantageous embodiments such that the control chamber, bounded by a passage, an actuating chamber within the connection housing then flows, which is penetrated by the pliers parts and slidably receiving the end-side connecting part of the collet.

In this embodiment, the axial length of the actuating chamber is selected parallel to the direction of displacement of the line such that upon displacement of the connecting part, the pliers parts with their respective arranged at the free end control parts reach the gegenüberliegend boundary walls of the control chamber to the plant. In particularly advantageous embodiments, when actuated release device to be inserted into the terminal housing line in its front contact position with the terminal housing, and when reset the line moves this, at least on their Reibkontaktfläche with the connecting part of the collet, in their rear Festlegestellung, in which the respective pliers parts by setting the second control slope of its control part at the second guide slope forming boundary wall of the control chamber define the line. The assembly process can be carried out in a particularly secure manner by the hose is used without damage in the front abutment position and reset from this position with actuated release device and thereby located in the release position Zangenteilen. About the entrainment of the connecting part of the collet not only the control parts are controlled in the Festlegestellung, but on the sealing device and the release device is reset from the operating position to the starting position.

In advantageous embodiments, the release device consists of a cap-like sleeve, which is guided longitudinally movable on the connection housing and this is inter-engaging in each of their Verfahrstellungen in contact with the sealing device.

The arrangement is made such that in the unactuated state of the sleeve, this seen in the longitudinal direction of their possible two movements, a distance from the connection housing, which is sufficient to bring the respective control part of the pliers parts from its rear to its front stop position and vice versa , The sealing device consists in particularly advantageous embodiments of at least two sealing rings, which receive the respectively Include line and which are in permanent contact with each other between the release device and the collet within the connection housing. By so derkammed between release device and collet seal in the terminal housing sealing rings a particularly secure seal between terminal housing and line can be achieved in the assembled state.

The invention with reference to an embodiment shown in the drawing is explained in detail.

Show it:

1 shows a connecting device according to the prior art, partly in longitudinal section and partly in side view;

Fig. 2 is a longitudinal section of the embodiment of the connecting device according to the invention, wherein in the lower half of the figure, the fixing state and in the upper half of the figure, the state of the actuated release device with fully inserted line is dargestel lt; an enlarged partial presentation of the area indicated in Fig. 2 with I I I area.

Fig. 1 shows a connection device of the prior art in a so-called angular connection forming construction, in which the connection housing 2, a receiving channel 4 for a hose 6 at right angles to a connecting channel 8 extending in a provided with an external thread 10 connecting piece 1 2 is located. That with the Connecting piece 1 2 integral connection housing 2 consists of a metallic material such as brass. FIG. 1 shows the hose 6 in a position completely inserted into the receiving channel 4, wherein the wall of the connecting housing 2 surrounding the receiving channel 4 rests on the outside diameter of the hose 6 within an end region 14 extending up to a step surface running in a radial plane 1 6, at which the connection housing 2 merges into a sleeve part 1 8, which extends at a distance from the outer diameter of the tube 6 along the receiving channel 4. Starting from the step surface 1 6 runs the inside of the sleeve part 1 8 in a longitudinal section 20 kreiszyl indric, which extends to an extension 22, starting from the starting the inner diameter of the sleeve member 18 to its free end back to the inner diameter of the Length section 20 is reduced. In this longitudinal section 20, a sealing ring 24 engaging on the step surface 16 is clamped by the connecting part 26, which forms a ring body, of a collet chuck.

The annular body of the connecting part 26 liegt with its outer surface 28 on the inside of the longitudinal section 20 of the sleeve part 1 8 and goes on its inner circumferential surface in the üben way with collets in a wreath resilient pliers parts 30, at the free end regions each a retaining lug 32 is located, which set by the bias of the pliers parts 30 as retaining claws the hose 6 against reset. For the disassembly of the inserted tube 6, a release device in the form of a cap-like sleeve 34 is provided, which is guided displaceably on the outside of the sleeve member 18 of the connection housing 2 and on the side facing away from the connection housing 2 end portion has a control body 36 which the sleeve member 1 8 in a Distance from the free end 38 overlaps. At its inner end, the control body 36 has an inclined surface 40 on which a sealing ring 42 abuts, which, moreover, also adjoins the inside of the sleeve part 18 and on one each further inclined surface 44 is supported, which are located at the engagement lugs 32 having ends of the pliers parts 30. In this arrangement, the release device is operable by moving the sleeve 34 for a disassembly, wherein from the inclined surface 40 of the sleeve 34 on the sealing ring 42, an actuation force and this in turn is transmitted to the inclined surfaces 44 of the pliers parts 30. The inclined surfaces 40 and 44 running at the same inclination act as control surfaces which bring the ends of the pliers parts 30 with the engagement projections 32 against the spring tension into the release position for dismantling the hose 6.

Figures 2 and 4 illustrate the embodiment of the connecting device according to the invention, wherein for functionally matching parts in Figures 2 and 3, the same reference numerals as in Fig. 1 are used. In this respect, the statements made regarding the individual components also apply to the embodiment according to the invention according to FIGS. 2 and 3. Unlike in FIG. 1, the connection device is designed as a straight connection, so that the receiving channel 4 of the connection housing 2 is rectilinear in the direction to the longitudinal axis 52 coaxial, only partially illustrated connecting piece 12 passes. As in Fig. 1, the terminal housing 2 is circular cylindrical in the inner end portion 14 for engagement with the outer diameter of the tube 6, and at this end portion 14 then sleeve member 18 continues to form a control chamber 54 with an expanded inner diameter. At a radially inwardly projecting shoulder 56 connects to the inside of the sleeve member 18 to the control chamber 54, an actuating chamber 58, which extends to the end 38 of the sleeve member 18 and is limited on the majority of its length by the circular cylindrical inner wall of the sleeve member 18. This circular cylindrical course of the wall forms the displacement guide for the annular body of the connecting part 26 of the collet and for the control body 36 of the actuating sleeve 34, which with its sleeve part 18 transmits over its Cylindrical lateral surface 60 is guided on the cylindrical inner side of the sleeve member 18 so that it can assume the different axial positions shown in Figure 2, which correspond to the Festlegestellung or the release position.

In the actuating chamber 58, the connecting part 26 of the collet with its outer circumferential surface 28 is guided on the inner circumferential surface of the sleeve member 18 movable. Between the connecting part 26 and the end of the control body 36 of the actuating sleeve 34, two sealing rings 62 and 64 are chambered lying together. The collet, which according to the prior art has a ring of resilient pliers parts 30, extends with their engagement lugs 32 having ends in the control chamber 54. These ends of the pliers parts are formed in the device according to the invention as control parts 66, which in cooperation with control beveled, which are formed on boundary walls of the control chamber 54, control the movement of the collet, the pliers parts 30 in the release position and in the Festlegestellung. For this purpose, the control parts 66 on a first control slope 68 which urges the pliers 30 against their spring tension in the release position by abutment against a first guide slope 70 on a boundary wall 72 of the control chamber 54. This state is shown in Fig.2 above. The control parts 66 also have a further second control slope 74 which, in cooperation with a second guide slope 76 on a boundary wall 78 of the control chamber 54 controls the control parts 66 in their engaged position. This condition is shown in Fig.2 below.

In this arrangement, the operation is as follows:

To perform a mounting operation, the release device is actuated by the actuating sleeve 34 is shifted in Fig.2 to the left, wherein the control body 36 via the chambered sealing rings 62 and 64, the actuating force on the annular body of the connecting part 26 of the collet transfers. When starting the control slope 68 of the control parts 66 on the guide slope 70 of the control chamber 54, the control parts 66 are forced by forced against the spring tension acting outwardly, so that the engagement lug 32 are located outside of the receiving channel 4 and thereby the tube 6 in the fully inserted position can be inserted, which is shown in Fig. 2 above without scratch marks on the tube 6 are generated during insertion. To fix the inserted tube 6, the tube 6 is reset to the axial position shown in Fig. 2 below. The frictional contact between the tube 6 and the connecting part 26 and the spring-applied pliers parts 30 takes the collet during the reset movement of the tube 6 in the position shown in Fig. 2 below, so that the control parts 66 with its slope 74 on the guide slope 76th start the control chamber 54 and thereby the control members 66 are forcibly controlled inwardly in its Festlegestellung, the engagement lugs 32, as shown in Fig. 2 below, come into holding engagement with the tube 6. Upon reaching this setting position, the actuating sleeve 34, which is entrained to the right via the sealing rings 62, 64, comes with an end hook portion 80 into contact with a projection 82 on the sleeve part 18, so that the sleeve 34 is secured against removal to the outside.

As indicated in FIG. 3 by lines 84 and 86, which represent the course of the first guide slope 70 on the boundary wall 72 and the course of the first control slope 68 on the control parts 66, guide slope 70 and control slope 68 run with different inclinations relative to the longitudinal axis 52. The resulting angles of inclination are indicated by α and β in FIG. The system between guide slope 70 and control slope 68 is therefore in line contact, so that with reduced friction, the movement of the control parts 66 is enabled in the release position with reduced operating force and 62 and 64, a relatively low compressive force is transmitted through the sealing rings. To further Protection of the sealing rings 62 and 64 also contributes that they are chambered between parallel planar surfaces of the connecting part 26 and the control body 36 of the actuating sleeve 34, so that no shear forces on the sealing rings 62, 64 act.

Advantageously, the sealing rings 62, 64 may be formed from a fluororubber (FPM), such as Viton®. As a material for to be connected compressed air hoses 6 materials such as polyethylene (PE), polyamide (PA) or polyurethane (PU) are advantageously suitable.

Claims

P a n t a n s p r e c h e Connecting device for at least one fluid-carrying line (6), in particular in the form of a compressed air hose, for connection to a same fluid leading terminal housing (2) having a collet whose individual pliers parts (30) articulated to a connecting part (26) resiliently movable are, in their Festlegestel development in the connection housing (2) recordable line (6) hold and by means of a release device (34) in their the line (6) releasing release Stel development, and with a sealing device (62, 64), by means of which the release device (34) when actuated exerts an actuating force on the collet for moving the individual pliers parts (30) out of their fixing position into their release position, characterized in that the sealing device (62, 64) acts on the connecting part (26) of the collet and that the pliers parts (30) by means of a control device (54, 70, 76) in the connection housing (2) upon actuation of the Löseeinric tion (34) in the direction of the sealing device (62, 64) ment of their Festlegestel ment reach into their release Stel. Connecting device according to claim 1, characterized in that the control device (54, 70, 76) in the connection housing (2) has a control chamber (54) whose axial extent paral lel to the respective direction of displacement of the line (6) is dimensioned such that a Control part (66) of the respectively assignable pliers part (30) in an end-side contact with a boundary wall (78) of the control chamber (54) determines the line (6) and in an opposite end-side contact with another boundary wall (72) of the control chamber, the line ( 6) releases. Connecting device according to claim 1 or 2, characterized in that the respective control parts (66) for the opposite ing end-side to a first control slope (68), the situation with progressing m it with a first guide slope (70) on the further boundary wall (72) of the control chamber (54) the jewei ls assignable Zangentei l (30) against its spring tension in - ne release Stel ment brings, as well as a second control slope (74), ie the progress of the system with the first boundary wall (78) the jewei ls assignable Zangentei l (30) brings into the he-setting Stel development. 4. Ansch lussvorrichtung according to any one of the preceding claims, characterized in that first (78) and further boundary wall (72) of the control chamber (54) extend transversely to the direction of travel of the line (6) and that the first boundary wall (78) under Bi The second guide bevel (76) has a conical annular surface which shortens the length of the control chamber (54) in the direction of the longitudinal axis (52) of a receiving channel (4) for the line (6). 5. Connecting device according to one of the preceding claims, characterized in that the inclination of the first guide slope (70) of the boundary wall (72) of the control chamber (54), seen in the Verschieberichtung the line (6), is less than the inclination of first control slope (68) of the jewei time sige Steuerertei ls (66), so that a line contact between the first guide slope (70) and the first control slope (68) is ermögl light. 6. Connecting device according to one of the preceding claims, characterized in that in extension of the first control slope (68) of the respective control lei le (66) each lei an engaging nose (32) connects, ie, starting from the Control panel (66), in Direction of the receiving channel (4) for the line (6) within the connection housing (2) protrude and as the plant second control slope (74) on the second guide slope (76) engage in the line (6). 7. Connecting device according to one of the preceding claims, characterized in that the control chamber (54), bounded by a passage, an actuating chamber (58) within the connection housing (2) connects, which is penetrated by the pliers parts (30) and the the end-side connecting part (26) of the collet slidably receives. 8. Connecting device according to one of the preceding claims, characterized in that the axial length of the actuating chamber (58) parallel to the direction of displacement of the line (6) is selected such that upon displacement of the connecting part (26), the pliers (30) with their respective am arranged free end control parts (66) reach the gegenüberl ing boundary walls (72, 78) of the control chamber (54) to the plant. 9. Connecting device according to one of the preceding claims, characterized in that when actuated release device (34) in the connection housing (2) to be inserted line (6) comes into its front contact position with the terminal housing (2) and that when resetting the line (6 ) This at least on its frictional contact surface with the connecting part (26) of the collet ment moves them into their rear Festlegestel, in which the respective pliers (30) by conditioning the second control slope (74) of its control part (66) on the second guide slope (76 ) defining the boundary wall (78) of the control chamber (54) define the line (6). 1 0. Connecting device according to one of the preceding claims, characterized in that the release device consists of a cap-like sleeve (34), the longitudinally movable on the arrival final housing (2) is guided and this inter-engaging in each of their Verfahrstellungen in contact with the sealing device (62, 64). 1 .Anschlussvorrichtung according to any one of the preceding claims, characterized in that in the unactuated state of the sleeve (34), seen in the longitudinal direction of their possible two movements, a distance from the connection housing (2), which is sufficient to the respective control part (66 ) To bring the pliers (30) from its rear to its front stop Stel ment and vice versa. 2. Connecting device according to one of the preceding claims, characterized in that the sealing device consists of at least two sealing rings (62, 64) which comprise the respective male line (6) and in permanent contact with each other between the release device (34) and the Collet located inside the connection housing (2).