DE19533553A1 - Pipe end hose clamp - Google Patents

Abstract

The elasticity of the hard-rubber locking rings (3) inserted radially between hose and clamp (1 and 4) should be less than that of the hose from room heat to well below freezing. The ring retains its shape under clamp pressure more than does the hose itself, and the ring (3) has radial projections (9) and the clamp (4) encloses the ring (3) between these (9). The locking ring should be integrally and/or positively joined to the hose end (2), the hose being made predominantly of ethylene-propylene-terpolymer (EPDM) or silicon rubber. The ring includes a hard elastomer, specifically polychloroprene, and the ring bears on the end of the hose via a radially inward projection (11), having specially moulded arms for preference which increase in thickness as they approach the locking ring (3). The ring is arched outward right the way round or has an inwards radiating resilient peripheral rib.

Description

The invention relates to a device for the festival clamp one pushed onto a pipe end section Hose end section made of predominantly soft elastic material material, with a surrounding the hose end section Hose clamp and surround the hose end section the, on this attached circlip made of elastic Material.

A device of this type is known from DE 35 43 717 A1 ( Fig. 3d). In this known device, the locking ring is a hose clamp, a so-called "spring band clamp", covering practically its entire circumference, a rubber ring which is anvulka coated or glued to the hose. This jacket ring holds the hose clamp in a predetermined, pre-assembled position on the hose. The hose can therefore be transported together with the preassembled hose clamp and easily assembled by means of a robot on a pipe socket which has a circumferential retaining rib, the hose clamp retaining its position largely unchanged both during transport and when being pushed onto the pipe socket.

Usually made of EPDM or silicone rubber Hose material that is often still through a fabric insert or fibers is reinforced, has numerous advantageous Properties that are particularly desirable in automotive engineering are like high heat resistance and high ozone resistance speed, but runs at temperatures below freezing point strongly together so that it has its elasticity largely loses and the connection between hose and pipe socket is leaking, even if the spring band bracket le a large part of this shrinkage of the hose material than is able to compensate. In addition, the well-known Hose material has the disadvantage that it is under the clamp pressure of the hose clamp flows away after a long time and is permanently deformed so that the connection between For this reason, hose and pipe are finally un becomes tight. The spring band clamp is also the same In this case, part of the deformation of the hose material off, but also only limited.

The invention has for its object a device of the type mentioned at the beginning, in which the verb extension between hose and pipe over a larger temperature ratur- and pressure area is tight.

According to the invention this object is achieved in that the Circlip radial between hose and hose clamp is arranged and consists of hard elastic material, its elasticity in the range from room temperature to far below the freezing point and its dimensional stability under the clamping pressure of the hose clamp higher than that of the hose material, and that the locking ring radi al has outwardly projecting projections, between which the hose clamp surrounds the locking ring.  

With this solution, the hard elastic fuse takes over ring, the material of which is independent of that of the hose The task is selectable, a deformation of the hose at low temperatures and under the clamping pressure of the Compensate hose clamp. At the same time, the safe provides ring with its radially protruding projections for securing the position of the hose clamp relative to the Hose in pre-assembled condition.

The retaining ring is preferably made of fabric and / or force connected to the hose end section.

While the hose is mainly EPDM or Sili Contains con rubber, preferably the locking ring a hard elastomeric material, which is easy in the can produce desired shape.

The circlip should mainly contain polychloroprene hold. This material fulfills to a high degree in connection with a hose material such as EPDM or silicone rubber, the requirements.

It is preferably ensured that the retaining ring we at least a radially inward projection points, which rests at the end of the hose. This lead represents deferral limit stops and determines at the same time the position of the circlip on the sly end section after the circlip up to the system the protrusion was pushed on at the end of the hose.

Several radially inward protrusions can on free end axially attached to the locking ring, in particular their molded, arms molded. The length of this ar me then determines the distance of the circlip from the open pushing end of the hose.

The radial thickness of the arms should be used for securing ring. The flexural strength of the arms then increases  also towards their most stressed Area too.

Then the locking ring can be axially continuous Have slot. If necessary, its spring constant higher than in the case of a closed circlip choose to be so that he avoids the hose material as a reliable follow-up and so largely for you constant clamping pressure even at lower temperatures If the tubing contracts. Likewise, the clamping force can be one elastic hose clamp lighter for a reduction of the diameter of the circlip.

At one edge of the slot, one should have the slot bridging tab be formed. Prevent this tab changed that the hose material in the ge through the slot formed gap evades. At the same time, it ensures you largely uniform distribution of the clamping pressure over the size of the hose.

If the tab is in one on the other edge of the slot bordering, he in the circumferential direction of the retaining ring engages extending recess, there is still a more uniform clamping pressure distribution over the hose catch as a gradual transition between the free End of the tab and the inside of the locking ring this way is avoided.

Then it is favorable if the locking ring on its the hose clamp facing side at least one radial has curved or corrugated spring element to the outside. This spring element acts in addition to the fuse ring and possibly the hose clamp under pressure the hose clamp a spring force, which is also for the Compensation for the shrinkage of the hose material at low temperature.  

Alternatively, the locking ring can be on the hose clamp facing side in the circumferential direction or axially corrugated, ring-shaped spring element made of spring plate sen. This spring element would have the same or similar Effect like the spring element mentioned above.

Instead of the spring element or in addition to this the circlip radially over its entire circumference be arched outside. This curvature also results in a feather effect under the clamping force of the hose clamp.

Furthermore, the locking ring can protrude radially inwards de, extending in the circumferential direction resilient ribs exhibit. These ribs also result in an additional Fe effect.

Likewise, the locking ring on the hose facing an axially corrugated or radially in NEN have a curved annular spring element. Also this spring element generates an additional spring force.

Then the hose clamp can be a radially inward exercise elasticity due to their own elasticity or be exciting. The inherent elasticity also causes an additional spring force, especially at low temperatures fittings, while giving in somewhat at high temperatures. The tensionable hose clamp, on the other hand, changes its diameter not water, so that they are particularly at high temperatures and expanding hose and circlip material for a stronger increase in tension than in the case of a elastic hose clamp (spring band clamp) ensures.

The invention and its developments are as follows based on the drawing of preferred embodiments described. Show it:

Fig. 1 is a perspective view of a device according to the invention, consisting of the circlip and the hose clamp, by means of which an end portion of a tube is clamped on an end portion of a Rohrstut zen,

Fig. 2 shows the section II-II of Fig. 1,

Fig. 3 is a perspective view of a hose with a modified retaining ring, wherein the tube clamp has been omitted for simplicity of illustration,

Fig. 4 is a perspective view of a hose with a further modified locking ring, wherein the tube clamp has been omitted for simplicity of illustration,

Fig. 5 is a perspective view of a hose with a further modified locking ring,

6 is a perspective view of a hose is omitted with a further modified locking ring and egg nem surrounding axially continuous slit or C-shaped spring member, wherein the hose clamp for ease of illustration Fig.

Fig. 7 is a perspective view of a hose with a modified retaining ring and a surrounding hose clamp,

Fig. 8 is a perspective view of a hose with a further modified locking ring, wherein the tube clamp has been omitted for simplicity of illustration,

Fig. 9 is a perspective view of a hose with the retaining ring of FIG. 7, however, another hose clamp,

Fig. 10 shows the section XX of Fig. 9,

Fig. 11 is a perspective view of a hose with a further modified locking ring, wherein the tube clamp has been omitted for simplicity of illustration,

Fig. 12 is a perspective view of a hose with a further modified locking ring, wherein the tube clamp has been omitted for simplicity of illustration,

Fig. 13 is a perspective view of a hose with a further modified locking ring, wherein the tube clamp has been omitted for simplicity of illustration,

Fig. 14 shows the section XIV-XIV of Fig. 13,

Fig. 15 is a perspective view of a hose with a further modified locking ring, wherein the tube clamp has been omitted for simplicity of illustration,

Fig. 16 is a perspective view of a hose with a further modified locking ring, wherein the tube clamp has been omitted for simplicity of illustration,

Fig. 17 shows the section XVII-XVII of FIG. 16,

Fig. 18 is a perspective view of a hose with a further modified locking ring, wherein the tube clamp has been omitted for simplicity of illustration,

Fig. 19 is a perspective view of a hose with a further modified locking ring, wherein the tube clamp has been omitted for simplicity of illustration,

Fig. 20 shows the section XX-XX of Fig. 19,

Fig. 21 is a perspective view of a hose with a further modified locking ring, wherein the tube clamp has been omitted for simplicity of illustration,

Fig. 22 shows the section XXII-XXII of Fig. 21 without the hose on an enlarged scale and the

Fig. 23 to 31 the section of FIG. 22 corresponding sectional views of further modified securing rings, some with additional spring elements.

According to FIGS. 1 and 2, a tube 1 with its Endab section 2 and a pre-assembled on the end portion 2 locking ring 3 which is surrounded by a tube clamp 4, via a holding rib 5 of an end portion 6 of a pipe 7 with a radial projection 8, which serves as a postponement limit stop for the hose 1 and the securing ring 3 until pushed against the projection 8 . If the pipe 7 is a pipe socket, e.g. B. the connector of a radiator in a motor vehicle, the projection 8 can be omitted. Instead, the wall of the cooler can then serve as a limit stop.

The tube 1 is made of EPDM (ethylene-propylene terpolymer) or silicone rubber and can be reinforced by a fabric or fibers such as aramid fibers. In a motor vehicle, it can serve as a cooling water or heating hose.

The circlip 3 has radially outwardly projecting projections 9 in the form of circumferential ribs or flanges, between which the hose clamp 4 is arranged, lying almost against the side of the projections 9 . On the side of the free end of the hose 1 , a cylindrical extension section 10 is formed on the locking ring 3 , to which in turn a radially inwardly projecting circumferential jump 11 is formed in the form of a flange. Before the jump 11 is at the end of the hose 1 and acts in this way as a deferral stop for the hedging ring 3 to arrange the hose clamp 4 at a predetermined distance from the free end of the hose 1 . The locking ring 3 is compared to the predominantly soft elastomeric material of the hose 1 from a predominantly hard elastomeric material, preferably polychloro pren. The elasticity of the material of the locking ring 3 is at least at temperatures which are below the room temperature from about 20 ° C. to well below freezing point, ie to about -30 ° C., less than that of the hose material. In contrast, the dimensional stability under the clamping pressure of the hose clamp 3 in the entire working temperature range is higher than that of the hose material. This means that the material of the retaining ring 3 does not tend to "creep" at the required clamping pressure of the hose clamp 3 , but is also very elastic at temperatures below freezing, while the hose material may have largely lost its elasticity, but at least so far may have contracted that the hose clamp 4 alone, even if it clamps the hose 1 from the outset, would no longer be able to exert the clamping pressure required for a tight connection between the hose 1 and the pipe 7 .

The hose clamp 4 consists of a spring steel strip with a corrugation 12 in the vicinity of a hook formed at one end of the spring steel strip hook 13 , which for tensioning the hose clamp 4 with one formed at the other end of the spring steel strip in the form of a further corrugation hook 14 engaged becomes. The locking ring 3 is integrally connected to the hose 1 , for. B. by sticking or vulcanizing. Alternatively or additionally, it can also be non-positively connected to the hose, for example in that its inner diameter is smaller than the outer diameter of the hose 1 before being pushed onto the end section 6 of the tube 7 . In this way the hose clamp 4 is at all times held in the desired mounting position, in particular during transport of the tube 1 with preassembled locking ring 3 and mounted thereon, not yet tensioned hose clamp 4, until the final assembly on the end portion 6 of the pipe 7, but also thereafter . If the ambient temperature drops, in particular to below freezing point, the material of the hose 1 contracts radially around the end section 6 of the tube 7 , so that it obtains a smaller outer diameter and its elasticity decreases, but the retaining ring 3 reduces its in Nameter also accordingly, largely because of its permanent, albeit less elasticity, ie greater rigidity. The Mate rial of the locking ring 3 expands radially inward and continues to ensure elastic contact of the hose 1 at the end section 6 of the tube 7 , since it can still not escape to the outside because of the hose clamp 4 . In addition, the elasticity of the hose clamp 4 caused by the corrugation 12 continues to cause a firm pressure by contracting more tightly.

The embodiment of FIG. 3 differs from that of FIGS. 1 and 2 only in that the securing ring 3 a has an axially continuous slot 15 , which is formed by an at one edge of the slot 15 , somewhat radially inward and on sides of the projection 11 is axially recessed, on its underside with the underside of the retaining ring at this edge aligned tab 16 is bridged to prevent the materi al of the hose 1 in the clamped state penetrates through the slot 15 to the outside and is clamped . The La cal 16 ensures a largely uniformly distributed over the circumference of the hose 1 clamping pressure.

The securing ring 3 b according to FIG. 4 differs from that according to FIGS. 1 and 2 only in that the cylindrical extension 10 is broken several times in the circumferential direction, so that it forms arms 17 , at the free ends of which one in each Circumferential direction is formed correspondingly narrower projection 11 a. This results in a material saving compared to the locking ring 3 .

In the embodiment of FIG. 5 and the projections 9 are compared with the embodiment of FIG. 4 interrupted several times in the circumferential direction, so that in order circumferential direction correspondingly shorter projections 9 a result, and the material saving is even greater.

The embodiment of FIG. 6 differs from that of FIG. 4 in that the radial thickness of the arms 17 a increases towards the locking ring 3 c. Accordingly, their bending strength also increases in the direction of their possibly greatest bending load. The securing ring 3 c is also surrounded by a corrugated in the circumferential direction, axially continuously slotted, ie C-shaped Federele element 18 , around which a clampable hose clamp is folded down. The spring element 18 additionally ensures a springy compensation of a deformation of the claw 1 at low temperatures.

Fig. 7 shows such a clampable hose clamp 4 a in the form of a screw clamp, as it can be used in the on device according to FIG. 6. The locking ring 3 c differs from that of FIG. 6 only in that the radial thickness of the arms 17 b to the locking ring 3 c increases in that they are provided on their radially outer side with an axial rib 19 , the thickness of the Circlip 3 c increases.

The apparatus of FIG. 8 1 2 4 differs from the pre directions of FIGS.,,, 6 and 7 only in that the extension 10 or retaining arms 17, 17 a jump to the Before 11, 11 a at the securing ring 3 d are omitted. It therefore requires less material. In contrast, the training with extension 10 or arms 17 , 17 a, 17 b, including stops 11 , 11 a, the advantage that the Si circlip and the hose clamp have a defined Ab from the hose end and not accidentally too close to the hose end, if necessary overlapping the hose end, so that they could slide off the hose. Otherwise, the retaining ring 3 d can be provided with a hose clamp 4 or 4 a and a Federele element 18 , as in the devices according to FIGS. 1, 2, 6 and 7.

The device of FIGS. 9 and 10 differs from that of FIG. 7 only in that it has a different hose clamp 4 b, also a so-called Fe derbandschelle (made of metal). It is opened in the preassembled position shown and is held in this position by a clamp 22 which extends over its radially projecting end sections 20 , 21 . Approximately diametrically opposite the Klam mer 22 , the band of the hose clamp 4 b at the point 23 is integrally connected to the retaining ring 3 c, z. B. by gluing or vulcanizing, optionally with the interposition of an adhesion promoter at Anvulkanisie ren.

Such a connection can also be used in the preceding Embodiments between the retaining ring and the respective hose clamp may be provided.  

The device of FIG. 11 differs from that of FIG. 8 only in that the projections 11 a of the locking ring 3 e are in the same plane as the one before 9 jump. Here too, the material of the extension 10 or the arms 17 , 17 a, 17 b is saved.

The device according to FIG. 12 differs from that according to FIG. 11 only in that the securing ring 3 f has a slot 15 , similar to the securing ring 3 a according to FIG. 3, with a tab 16 bridging the slot 15 , which in a circumferentially extending recess 24 engages in the form of a slot on the other edge of the slot 15 . In the closed state of the circlip 3 f, a stepless transition between the radially inner side of the tab 16 and the radially inner side of the circlip 3 f is ensured in this way in order to maintain the clamping pressure evenly over the circumference of the hose, despite the interruption through the slot 15 to distribute.

3 g between the projections 9 with a plane passing through the ge entire circumference corrugation of spring elements 18 a provided is, the cross section about which the device according to FIGS. 13 and 14 differs from that of FIG. 11 only in that the securing ring Has cut from Kreisab and which are integrally formed with the locking ring 3 g. These spring elements 18 a have a similar function to the spring element 18 according to FIG. 6. Under the pressure of the hose clamp, they can deflect elastically in the circumferential direction into the troughs between the spring elements 18 a. The separate design and assembly of a Fede element, such as the spring element 18 according to FIG. 6, is omitted here.

The device according to FIG. 15 is designed in the same way as that according to FIG. 6, only that the retaining ring - similar to the previous embodiment - is provided in one piece with corrugations 18 b, but with an approximately sawtooth or triangular cross section.

The device shown in FIGS. 16 and 17 differs from that of FIG. 6 only in that the Fe derelement 18 c consists of a simple, radially outwardly arched leaf spring 18 c, which is in the circumferential direction of the retaining ring 3 c extends and with one end cohesively, by gluing or vulcanizing, is connected to the locking ring 3 c. The connection point is designated 25 . The spring element 18 c can therefore un stretch under the clamping pressure of the (not shown) hose clamp elastically in the direction of its free end.

The device according to FIG. 18 differs from that according to FIGS. 16 and 17 only in that the one en de of the spring element 18 d is not cohesively but positively attached to the locking ring 3 c. For this purpose, the projections 9 are provided with radial incisions 26 , in which at the one end of the spring element 18 d since protruding projections 27 are suspended.

The spring elements 18 , 18 c and 18 d are made of metal, but can also be made of plastic.

The device according to FIGS. 19 and 20 differs from that according to FIG. 18 in that the spring element 18 e is formed in part with the locking ring 3 i in the form of a radially outwardly curved projection.

The device according to FIGS. 21 and 22 differs from that according to FIG. 3, on the one hand, in that arms 17 c provided with stops 11 a are positively fastened to one projection 9 by having the projection 9 with one end trained hook 28 overlap, and on the other hand in that the locking ring 3 j between the lateral projections 9 is curved radially outward over its entire circumference, as shown in Fig. 22 in the enlarged sectional view XXII-XXII, and Tab 16 a is curved radially outwards in a similar manner and engages in the recess 29 formed by the curvature of the locking ring 3 j on the underside. The hedging ring 3 j is therefore axially elastically spreadable in the region of its curvature under the clamping pressure of the (not shown) hose clamp, so that it enables a greater radial spring travel with the same radial thickness as that of the previous exemplary embodiments. The locking ring 3 j mainly contains hard elastomeric material, such as the exemplary embodiments described above. However, it can also be made of metal, e.g. B. spring steel sheet.

The locking ring 3 k of FIG. 23 corresponds to the hedging ring according to Fig. 1, only that it is arched between the projections 9 radially outwardly, much like the hedging ring 3 j of FIGS. 21 and 22.

The securing ring 3l of FIG. 24 also corresponds to the retaining ring of FIG. 1, except that it is curved on its radially outer side radially outwards and having on its inside an annular groove 30 in which a ringförmi ges spring element 31 in the form of an O Sealing ring is arranged. This spring element 31 together with the hedging ring 3l ensures compensation for deformation of the hose material at low temperatures.

The locking ring 3m of FIG. 25 is similar to the hedging ring 3 k according to Fig. Shaped 23, but contains in its recess 29 an annular spring member 32 made of elasto Merem material of lenticular section, which has the same function as the spring element 31 in Fig. 24 Fulfills.

The retaining ring 3 n according to FIG. 26 also corresponds to the retaining ring 3 according to FIG. 1, only that it has on its inside two spring elements 33 in the form of circumferential ribs formed in one piece with the retaining ring 3 n.

These also serve the same purpose as the spring elements 31 and 32 in FIGS. 24 and 25.

According to FIG. 27, the retaining ring 3 n contains, in comparison to FIG. 26, an annular spring element 34 , which is inserted between the spring elements 33 and is made of elastomeric material.

The securing ring 3 p according to FIG. 28 differs from that according to FIG. 26 in that instead of only two rib-shaped, circumferential spring elements, a plurality of spring elements 33 are provided on the inside.

The securing ring 3 according to FIG. 29 differs from that according to FIG. 28 in that an annular spring element 35 made of ela stomeric material, axially selected on its radially inner side, is glued or vulcanized on. This spring element 35 has the same function as the Federele elements 33 in FIG. 28th

The circlip 3g of FIG. 30 substantially corresponds to the locking ring 3 of FIG. 1, except that on its inner side a circumferential recess 29 a is formed in a radially inwardly curved annular Federele element 36 made of spring metal sheet, in particular sheet metal, is set is. This spring element 36 has in the relaxed To a smaller axial width than the recess 29 a, so that it can stretch axially under the clamping pressure.

The circlip 3 according to FIG. 31 in turn corresponds to the circlip 3 according to FIG. 1, but contains on its outer side between the projections 9 an annular, axially corrugated annular spring element 37 made of sheet metal, in particular sheet metal. Its axial width is less than the axial distance between the projections 9 , so that it can stretch axially under the clamping pressure of the hose clamp as well as the spring element 36 .

Further modifications are also possible: For example, the locking rings shown closed can also be designed axially with a continuous slot 15 , that is to say open. Conversely, it is also possible to form the locking rings 3 a, 3 f and 3 j closed. However, the closed circlips should predominantly have hard elastomeric material, such as polychloroprene. In addition, individual design features of the circlips can also be exchanged or combined. Hose clamps other than shown can also be used.

Claims (17)

1. A device for clamping a on a Rohrendab cut (6) pushed hose end (2) consists predominantly weichelastomerem material with the hose end (2) surrounding the tube clamp (4; 4 a; 4 b) and a surrounding the hose end (2) the at this fixed securing ring (3; a- 3 3 g) of elastic material, characterized in that the securing ring (3; 3 a- 3 q) radially between the hose (1) and hose clamp (4; 4 a; 4 b) is arranged and made of hard elastic material, the elasticity in the range from room temperature to far below the freezing point Ge smaller and its dimensional stability under the clamping pressure of the hose clamp ( 4 ; 4 a; 4 b) is higher than that of the hose material, and that the securing ring ( 3 ; 3 a- 3 q) has radially outwardly projecting projections ( 9 ; 9 a), between which the hose clamp ( 4 ; 4 a; 4 b) surrounds the retaining ring ( 3 ; 3 a- 3 q). 2. Device according to claim 1, characterized in that the retaining ring ( 3 ; 3 a- 3 q) is integrally and / or non-positively connected to the hose end section ( 2 ). 3. Apparatus according to claim 1 or 2, characterized in that the hose ( 1 ) mainly contains EPDM or silicone rubber. 4. Device according to one of claims 1 to 3, characterized in that the locking ring ( 3 ; 3 a- 3 q) has a hard elastomeric material. 5. Device according to one of claims 1 to 4, characterized in that the retaining ring ( 3 ; 3 a- 3 b) contains mainly polychloroprene. 6. Device according to one of claims 1 to 5, characterized in that the locking ring ( 3 ; 3 a- 3 c; 3 e- 3 q) has at least one radially inwardly projecting projection ( 11 ; 11 a), which at the end of the hose ( 1 ). 7. The device according to claim 6, characterized in that the radially inwardly projecting projections ( 11 a) at the free end axially on the locking ring ( 3 ; 3 a- 3 c; 3 e- 3 q) brought, in particular molded, arms ( 17 ; 17 a; 17 b; 17 c) are molded on. 8. The device according to claim 7, characterized in that the radial thickness of the arms ( 17 a; 17 b) to the retaining ring ( 3 c; 3 h; 3 i) increases. 9. Device according to one of claims 1 to 8, characterized in that the retaining ring ( 3 ; 3 a- 3 q) has an axially continuous slot ( 15 ). 10. Device according to one of claims 1 to 9, characterized in that on one edge of the slot ( 15 ) a slot ( 15 ) bridging tab ( 16 ; 16 a) is formed. 11. The device according to claim 10, characterized in that the tab ( 16 ; 16 a) in an adjacent to the other edge of the slot ( 15 ), in the circumferential direction of the retaining ring ( 3 ; 3 a- 3 q) extending recess ( 24 ; 29 ) engages. 12. The device according to one of claims 1 to 11, characterized in that the retaining ring ( 3 ; 3 c; 3 g; 3 h, 3 i) on its side of the hose clamp ( 4 ; 4 a; 4 b) at least one side has radially outwardly curved or corrugated spring element ( 18 ; 18 a- 18 e). 13. The device according to one of claims 1 to 11, characterized in that the retaining ring ( 3 ; 3 c) on its ner the hose clamp ( 4 ; 4 a; 4 b) facing side in the circumferential or axially corrugated, annular spring element ( 18 ) made of spring sheet. 14. Device according to one of claims 1 to 13, characterized in that the retaining ring ( 3 j; 3 k; 3 m) is curved radially outwards over its entire circumference. 15. The device according to one of claims 1 to 13, characterized in that the retaining ring ( 3 n; 3 p) has radially inwardly protruding, in the circumferential direction he extending, resilient ribs ( 33 ). 16. The device according to one of claims 1 to 15, characterized in that the locking ring on its side facing the hose has an axially corrugated or ra dial inwardly curved annular spring element ( 31-36 ). 17. Device according to one of claims 1 to 16, characterized in that the hose clamp ( 4 ; 4 a; 4 b) exerts a radially inward clamping force due to its inherent elasticity or can be tensioned.