DE3409907A1 - Kit for fixing the end of a body, in the form of a column, in a sleeve - Google Patents

Abstract

A kit for fixing the end of a body, in the form of a column, in a sleeve of matched profile, in which both the body and the sleeve are inflexible in the radial direction, in which the sleeve and the body are separated by a radial gap, in which the gap in the direction facing the end of the body is expanded in a wedge shape, in which an annular clamping body is arranged in the region of the expansion thus formed, which clamping body rests with a clamping surface on the expansion and with at least one projection, which extends in the lateral direction, on the body, the projection and the clamping surface being axially adjacent, the clamping body consisting of an elastically flexible polymeric material, the projection having an internal cross-section which is smaller before insertion of the body than the external cross-section of the body, and the projection of the clamping surface being axially adjacent on the side of the clamping body facing the end of the body.

Description

Kit for defining the end of a

columnar body in a sleeve The invention relates to a Kit adapted to fix the end of a columnar body in a sleeve Profile in which both the body and the sleeve are rigid in the radial direction in which the sleeve and the body are separated by a radial gap, in which the gap widens in a wedge shape in the direction facing the end of the body is, an annular one in the area of the enlargement formed in this way Clamping body is arranged, which rests with a clamping surface on the extension and having at least one transversely extending protrusion on the body, wherein the protrusion and the clamping surface are axially adjacent.

Such a kit is known. It is mainly used on the field of hydraulics in the definition of pipes. The annular clamp body consists of steel and has an inside diameter before the pipe is inserted which is consistently larger than the outer diameter of the pipe to be accommodated. The clamping body is in the rearward direction through a perpendicular to the longitudinal axis extending clamping surface limited, on which the inwardly projecting flange of a the clamping nut, which can be screwed to the sleeve, is applied.

As a result, it is forcibly tapered in the tapered direction in the direction of the pipe Sleeve can be pressed in, with a plastic deformation of the clamping body Reduction of its inside diameter results. In the deformation process is the plastic deformation of the edge-like limited, annular, projection included, which is axially adjacent to the clamping surface in the rearward direction of the pipe. He eventually penetrates the surface of the pipe and only then does it desired definition and sealing. However, as a result of the notch a certain weakening of the load-bearing cross-section must be accepted.

It can therefore be very easy, especially when vibrations occur for tearing off the pipe in the area of the protrusion that has penetrated its surface come.

Furthermore, the use of such a kit assumes that both the clamping body and the pipe to be fixed from a plastically deformable Material consists, the mechanical hardness of the for the manufacture of the clamp body material used that of the material used to manufacture the pipe exceeds. It is difficult to guarantee both.

In addition, the achievement of a good determination result is essential of the pipe using a kit of the type described above, that the individual parts of the kit, namely the sleeve, the clamping body and the Clamping nuts have precise dimensions and the pipe to be accommodated without angular displacement assigned. This condition can also be used in a craft very difficult to meet.

The invention is based on the object of providing a kit of the initially to further develop mentioned type in such a way that disadvantages similar to those mentioned above no longer occur. The kit should avoid screw connections in particular the damage-free definition of a columnar body in a sleeve adapted Allow profile if the longitudinal axes of both parts have a certain angular displacement exhibit.

This task is according to the invention with the characterizing features of claim 1 solved.

The subclaims refer to advantageous configurations.

The proposed kit is characterized according to claim 1, that the clamping body consists of an elastically resilient, polymeric material, that the projection has an internal cross-section that is smaller before the insertion of the body is than the outer cross-section of the body and that the projection of the clamping surface on the side of the clamping body facing the end of the body is adjacent. That Inserting the body to be picked up thus only leads to an elastic deformation the clamp body made of polymer material, preferably rubber, does not however, to its plastic deformation or to a permanent change the shape of the captured body.

The proposed kit includes fewer individual parts and can For this reason alone, manufacture more cost-effectively than the design described at the beginning.

Using the proposed kit is much easier than that of the type described at the beginning. It no longer sets the successive Disassembly and reassembly of all the individual parts of the kit beforehand, but limited to the simple insertion of the body to be fixed into the Clamping body already containing sleeve. To this extent, a certain amount of deformation work is required be made than the free cross-section of the projection is kept slightly smaller is than the outer cross-section of the body to be picked up.

The projection #, however, consists of the same flexible material like the clamp body and is freely movable in the radial direction. The generation The forces required for the required deformation are therefore very low. Relative large tolerances of the parts to be connected can be bridged.

In contrast to the above-described insertion of the columnar The body cannot easily be removed from the sleeve.

An outward force is applied to the assembled body exercised, this is applied to the surface with an elastic pretension the body adjacent projection transferred to the clamping body. This is on the inside on the surface of the columnar body, on the outside on the Inner wall of the sleeve, the cross section of which is wedge-shaped in the outward direction reduced. The forces introduced through the absorbed body can therefore also not lead to its axial displacement in the outward direction, but only have a radial compression of the clamping body between the clamping surface the sleeve and the captured body result. The degree of this compression is depends on the cone angle and on the size of the forces introduced. The related Relationships are, however, known to the person skilled in the art and are necessary here Registration no explanation.

in relation to the definition of pipes, cone angles of lq has proven its worth up to 35 °; with a degressive in the direction of the projection decreasing angle improves responsiveness, one in the direction of progressively increasing angle of the projection provides improved angular mobility of the columnar body conditionally. The connection obtained can therefore be used as a can be called insoluble. In cases where the possibility of non-destructive The termination of the connection is absolutely necessary, but there is also a possible use when the body to be picked up is bounded circularly and provided with a thread is. It can then be unscrewed from the clamp body at a later date. Of the In such a design, the thread turn can cause a tendency to leak. It can be countered by training as finely as possible and by storage a permanently plastic sealing compound, for example from petroleum jelly or grease. Since the Assembly does not require any screwing operations, is a displacement of the sealant not possible during this process.

The clamping body can, apart from the area of the clamping surface, a have a small distance from the surface of the body to be recorded, what of Insertion greatly facilitated without at the same time the strength of the obtained Jeopardize connection. The distance is expediently no more than 1 to 2 tenths of a millimeter.

The shape of the clamping body and the sleeve is that of the one to be received Body adapt. It can be designed in any way and can be polygonal, oval or be limited in a circle.

The projection can be on the side facing the end of the body be bounded by a surface extending in the transverse direction. A mechanical one Damage to both the protrusion and the body to be picked up during the mutual joining is avoided.

According to another advantageous embodiment, it is provided that the projection on the inside by an axially parallel surface is limited. The projection hugs the surface of the recorded Body particularly beneficial to what is important in terms of transmission of the Forces introduced through the body act on the actual clamping body.

According to a further advantageous embodiment, it is provided that the projection is formed by an annular membrane that consists of the thickened part of the clamping body protrudes in the axial direction.

The radial thickness of such an annular membrane is very small and amounts to generally only a few tenths of a millimeter. The axial length is considerably greater. It is at least 1 mm and can reach a maximum value that corresponds to the diameter of the recorded body matches.

The purpose of the ring membrane in the proposed kit is to to activate the clamp body when outward tensile forces act on the absorbed Body to be exercised. In this sense, it is advantageous if the ring diaphragm as close as possible to the surface of the captured body, and therefore is particularly flexible in itself. A thin design is therefore advantageous.

It finds its limit in the necessary resilience in mechanical point of view.

The clamp body of the proposed kit consists of an elastic compliant, polymeric material and is therefore highly deformable and adaptable. Angular displacements between the axis of the captured body and that of the sleeve are therefore generally of no consequence for the achieved Determination result and can therefore be accepted without further ado.

The proposed kit is particularly suitable for the liquid-tight and mechanically stable fixing of pipes as well as for the production of pipe connectors. In terms of their external shape, these can be the ones commonly used in the installation area Versions are adapted and thus form an inexpensive replacement for the Screw connectors that have been used unchanged in this field for decades.

At the same time, this has the advantage of being considerably simplified Assembly and good insulation of the structure-borne noise, which is often transmitted through pipelines, of vibrations and in electrical terms. A use for theft-proof Attachment of license plates is possible. The circularly bounded body should in this case, however, be provided with a thread in order to loosen the connection to enable from the trunk. The body then has a flat, rotationally symmetrical one Head that rests on the license plate and a hexagon socket or slot on the side facing into the trunk.

The attached drawing illustrates some application examples. It is explained in more detail below.

They show: FIG. 1 a kit for fixing the end of a Draw hook.

Figure 2 shows a kit for the mutual connection of the ends of two straight butting tubes.

Figure 3 shows a kit for the mutual connection of two angular abutting pipes.

In the kit of Figure 1, the sleeve 1 consists of sheet steel and is molded in one piece from the wall of a housing. The sleeve 1 is rotationally symmetrical and has an inner cross-section that widens conically in the rearward direction on. The opposing inner surfaces of the sleeve form an angle of 10 °.

The body 2 is mounted concentrically in the sleeve.

This has a cylindrical shape and forms the rear end of a Zugliakens. The body 2 is also made of steel and to this extent is just as unyielding like the sleeve 1.

In the gap between the sleeve 1 and the body 2, the clamping body is 3 arranged. This essentially fills the gap and consists of a rubber-elastic one Material with a Shore A hardness of about 55. This makes it easy to deform and position it slightly in the sleeve before inserting the body 2. Included reaches the clamping surface 7 on the conical upwardly widened inner wall of the Sleeve for contact and the flange 4 protruding outward in the radial direction on the end wall of the sleeve.

The inner diameter of the sleeve is in the area of the axial extent the clamping surface is slightly larger than the outer diameter of the body to be picked up 2. In the present exemplary embodiment, the play 6 is approximately one tenth of a millimeter. It enables the body to be picked up to be easily inserted and pushed in 2.

At the upper end, the inner diameter of the clamp body 3 is through the annular self-contained projection 5 reduced to a value below the outer diameter of the body 2 to be accommodated. The lead is that axial extension of the clamping surface 7, however, axially adjacent, and has as a result its small radial thickness is easy to deform. The one for the whole Pushing the body 2 required deformation forces are therefore not very large and easy to apply.

The projection 5 is in the illustrated embodiment a ring membrane is formed. This hugs itself after inserting the body 2 evenly on its surface and creates a non-positive connection.

Then there is a downward tensile force on the hook exerted, then an immediate initiation over the protrusion results in the Clamp body 3.

This consists of a slightly flexible, but not compressible Material. The clamp body in the conical tapering in cross section Forces pressing the sleeve can therefore only cause it to be deformed for so long lead, as there is still a remainder of the originally existing game 6. If this is filled in, then a further deformation of the clamping body takes place independently of the softness of the material used no longer takes place, i.e. the body 2 is fixed immovably in the axial direction. The ones that can be transferred via the hook Tensile forces are therefore arbitrarily large and essentially dependent on the mechanical Resistance of the sleeve 1 and the body 2.

Figure 2 refers to the use of the proposed kit for the mutual use of straight butting pipe ends. the Sleeve 1 consists in this case of PVC and has its axial in the middle area Extension and a reduction in their internal cross-section at the ends on both sides on.

This is used to guide the inserted pipes, with the middle Area, an inwardly protruding projection 8 of the sleeve is provided as a stop limit serves.

From the ends facing away from each other, the pipes are to be inserted inserted on both sides of the rotationally symmetrical clamping body 3.

This consists of soft rubber and has a circumferential flange 4, which rests on the end face of the sleeve 1 after insertion and on this way the correct assignment of the clamping surface 7 to that in its cross-section Tapered in the outward direction reduced inner surface 9 of the sleeve guaranteed.

The inner diameter of the clamping body is in the area of the axial extent the clamping surface 7 and the conical surface 9 designed to be slightly larger than the outer diameter of the pipe to be inserted. This can be easily integrated into the pre-assembled Push in the pipe connector.

In this case, too, the clamping body is provided with an annular diaphragm formed projection 5 provided, the axial extent of the clamping surface 7 axially is adjacent. The inner diameter of the annular diaphragm, which is made in one piece from the body of the clamp body is formed slightly before inserting the pipe smaller than its outer diameter.

To assemble a pipe it is only necessary to finish the plug the pre-assembled pipe connector onto the end of the pipe and push it forward so far, until the end face of the tube rests against the stop 8 of the sleeve. Will subsequently exerted an outward force on the tube results in a similar way to In the case described above, a transfer to the ring membrane 5 conical outwardly tapered clamping body 3, and thus its radial compression between the outer wall of the pipe and the inner wall of the area of the surface 9 conical sleeve.

It is therefore no longer possible to remove the pipe.

A similar effect results when a flowable medium is poured into the Pipe is introduced, for example, pressurized gas or water. There the end wall of the tube is not sealed against the stop 8, the flowable material arrives Medium easily in the ring-shaped free space 9. This is the Clamping body in the area of its largest radial [: rstreckull9 axially upstream, which leads to the fact that the pressure of the medium contained in the pipeline is similar as in the case described above, to a radial compression of the clamping body 3 between the pipe wall and the conical inner surface 9 of the sleeve leads.

A good sealing result and a good axial fixing of the inserted pipe is the result.

Figure 3 refers to an embodiment in which the in the pipe ends to be connected are assigned to one another at an angle of 90 n. The sleeve, which extends over the two pipe ends, is angled to the right, however, it has the same clamp bodies and the same function as above described.

Other designs of pipe connections than those described in FIGS. 2 and 3 si od possible. They include all the basic shapes required in the sanitary sector, in particular T-pieces, cross pieces, elbow pieces with different angles and transition pieces for the mutual connection of pipes of different diameters.

In the exemplary embodiments shown in FIGS. 2 and 3 the spatial position of the front end of the inserted tube in the axial direction # he direction is determined by the stop 8, in the radial direction by a corresponding one Constriction of the inner diameter of the sleeve 1. The latter can be the end of the tube meanwhile surrounded with a small distance, which makes it possible to angular displacements equalize between the pipe ends to be connected. The attack can with at least an axial I) opening to allow rapid pressure build-up in space 9 favor.

In the kits shown in all the exemplary embodiments, the Klernml <(but only loosely inserted into the sleeve. The assembly of the Klenlmkirper is particularly easy as a result. In special cases, however, it is also possible to glue the sleeve and the clamping body if necessary. In particular This means that very large, axially directed tensile forces can be better applied to the sleeve transfer. The surfaces delimiting the clamping body in the radial direction are in generally to the surface shape of the surfaces to be determined relative to one another customized. There are generally no surface irregularities worth mentioning here present, which is why a corresponding design of the clamping body is readily available leads to the desired result. The creation process is accordingly simple and possible at low cost.

Appropriate training can be used in order to achieve A good sealing result can be problematic if the relative to each other surfaces to be defined have strong irregularities, for example is often the case with concrete or cast materials.

In order to achieve a good seal in these cases too, it has It has been found to be useful to use the clamping body on the corresponding surfaces a plurality of axially adjacent, circumferentially extending ribs to provide. The individual ribs only have a very small axial extent and a correspondingly great suppleness. You can easily do this in penetrate the surface irregularities of the corresponding material surfaces and in this way to realize a tight connection. The individual in axial Direction of successive ribs complement each other in their effect, so that even in this unfavorable case, in addition to a good definition, a reliable one The sealing result is always guaranteed.

Claims (5)

Claims 1. Kit for defining the end of a columnar Body in a sleeve adapted profile, in which both the body and the Sleeve are rigid in the radial direction, in which the sleeve and the body through separated by a radial gap, the gap being in the end of the body facing direction is widened in a wedge shape, in which in the area of the so formed Extension an annular clamping body is arranged with a clamping surface rests against the extension and with at least one extending in the transverse direction Projection on the body, the projection and the clamping surface being axially adjacent are characterized in that the clamping body (3) consists of an elastically flexible, polymeric material is that the projection (5) has an internal cross-section that before inserting the body (2) is smaller than the outer cross-section of the body and that the projection of the clamping surface (7) on that facing the end of the body Side of the clamp body is axially adjacent. 2. Kit according to claim 1, characterized in that the clamping body (3) is made of rubber. 3. Kit according to claim 1 to 2, characterized in that the Projection (5) on the end of the body (2) facing side by a transversely extending surface is limited. 4. Kit according to claim 1 to 3, characterized in that the Projection (5) limited on the inside by an axially parallel surface is. 5. Kit according to claim 1 to 4, characterized in that the projection (5) is formed by a ring membrane.