DE102007035930A1 - Multi-crimp-hose clamp for fastening end section of hose on end section of pipe, has hose sliding over end section of pipe, where center region of clamp exhibits smaller diameter than boundary regions of clamp - Google Patents

Abstract

The clamp (1) has a hose (2) sliding over an end section of a pipe (3), where center region (1') of the clamp exhibits a smaller diameter than boundary regions (1'') of the clamp. The clamp is applied radially outward in a region on the end section of the hose. Widening of the diameter to the boundary regions is obtained by a cone-shape and/or a circle-shape. The clamp is rotationally symmetrical to a longitudinal axis (4). A cone angle of the cone-shape is between specific degrees with respect to a longitudinal axis. The clamp is made of metal.

Description

The The invention relates to a multi-crimp hose clamp having the features from the preamble of claim 1.

The technical environment, for example, the German patent application DE 103 59 799 A1 pointed. From this a hose coupling is described with a radially deformable around the longitudinal axis clamp. The edges of the clamp are in this case closer to the longitudinal side of the hose coupling than the intermediate region, ie, the edges have a smaller diameter than the central region. The hose coupling is provided for a pipe, on the end portion of the end portion of a hose can be plugged and clamped by means of the clamp. The end portion of the tube further comprises a circumferential retaining rib, over which the end portion of the tube is pushed away. Radially outside the hose, in the area of the retaining rib, the clamp can be applied, so that the hose between the retaining rib and the clamp can be clamped. To clamp the hose, the hose coupling further comprises a screw connection, wherein when tightening the screw the radius of the clamp is reduced and thus the hose is clamped tightly on the pipe.

Next is from the not yet published German patent application with the official file number 10 2007 008 274.8 , from which this invention proceeds, a multi-crimp hose coupling known, with a radially deformable around the longitudinal axis clamp. The edge regions of the clamp have a smaller diameter than the region lying between the edge regions. The clamp is slidable onto a hose, the hose in turn being slidable onto an end portion of a pipe. So that the position of the tube is defined on the tube, the end portion of the tube has a circumferential retaining rib. In order to secure the hose on the end portion of the pipe, the clamp is pressed onto the hose with radial multicrimps, ie the outer diameter of the clamp is reduced by radial pressing at several points of the outer circumference.

adversely on the known multi-crimp hose clamp is after the crimping process an unfavorable stress distribution in the hose leading to Problems, such as B. cracking or hose breaks lead can.

task The present invention is a multi-crimp hose clamp show, in the tubing after crimping a non-critical Has stress distribution and thus a better durability is guaranteed.

These The object is achieved by the feature in the characterizing part of the claim 1 solved.

By the embodiment of the invention occur clearly lower voltages in the hose wall, with the same security the connection against loosening against the stand of the technique. In addition, the connection is essential Insensitive to accidentally too strong executed pressing, which occur for example in process fluctuations can. At the same time, at lower voltages in the hose, the surface pressures higher in the area of the smallest diameter, larger ones Reserves against leaks means.

The Embodiments according to the claims 2 to 4 are particularly preferred geometric embodiments.

Prefers is the multi-crimp hose clamp according to claim 5 made of a metal such as a ferrous material.

in the The following is the invention with reference to a particularly preferred embodiment explained in two figures.

1 shows a section through a hose coupling with an inventively designed multi-crimp hose clamp.

2 shows a section through an inventively designed multi-crimp hose clamp.

1 shows a section through a hose coupling with an inventively designed multi-crimp hose clamp 1 , Radially about a longitudinal axis 4 is an end portion of a pipe 3 on which a hose 2 is deferred. Radially outside around the hose 2 is the multi-crimp hose clamp 1 around the hose 2 crimped. According to the invention, the multi-crimp hose clamp 1 in a middle area 1' a smaller diameter than at their edges 1'' ,

2 shows a section through the inventively designed multi-crimp hose clamp 1 , In this embodiment, the inventive design by a conical expansion of the diameter to the edge regions 1" achieved. A cone angle α of the cone shape be contributes in this particularly preferred embodiment, 12.5 °. In other embodiments, the cone angle α may be between 5 ° and 45 °. Both the opposite cone angles go in the middle area 1' the multi-crimp hose clamp 1 over a radius into each other. This radius is in the present, particularly preferred embodiment 10 mm, wherein the radius is preferably defined at the inner diameter. In further embodiments, this radius (R) can be between 0.5 mm and 300 mm. Again, in another embodiment, it is also possible to replace the cone shape by a possibly varying in diameter radius.

Preference is given to the multi-crimp hose clamp 1 made of a metal, such as a ferrous material, but also copper, aluminum alloys or other metal alloys can be used.

By the embodiment of the invention is in an advantageous Make a more even stress distribution reached in the tube wall after the pressing process. Continue to form significantly lower voltages in the tube wall, at the same Safety of the connection against loosening compared with the state of the art. In addition, the inventive Design a much greater insensitivity over-pressing, such as it can occur, for example, in the case of process fluctuations.

1

Multi-crimp hose clamp

1'

mid-range

1''

border area

2

tube

3

pipe

4

longitudinal axis

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 10359799 A1 [0002]
• - DE 102007008274 [0003]

Claims (5)

Multi-crimp hose clamp ( 1 ) for fixing an end portion of a hose ( 2 ) on an end portion of a pipe ( 3 ), the multi-crimp hose clamp ( 1 ) radially outward in an area on the end portion of the hose ( 2 ) is applied, which over the end portion of the tube ( 3 ) is slidable, characterized in that the multi-crimp hose clamp ( 1 ) in a middle area ( 1' ) has a smaller diameter than at its edge regions ( 1'' ). Multi-crimp hose clamp according to claim 1, characterized in that a widening of the diameter to the edge regions ( 1'' ) is achieved through a cone shape and / or a circular shape. Multi-crimp hose clamp according to claim 2, wherein the multi-crimp hose clamp rotationally symmetrical a longitudinal axis, characterized in that a Cone angle a of the conical shape between 5 ° and 45 ° with respect to the longitudinal axis is. Multi-crimp hose clamp according to claim 2, characterized in that a radius (R) of the circular shape between 0.5 mm and 300 mm. Multi-crimp hose clamp according to one of the claims 1 to 4, characterized in that the hose clamp ( 1 ) is made of a metal.