Hose Clamp

Abstract

The present disclosure relates to a hose clamp with a clamp band (1), in which plurality of thread teeth (2) are formed which follow one another at a respective spacing and with which a clamping screw (3) of a clamping device of the hose clamp can be brought into engagement, in order to tension the clamp band (1). The clamping screw (3) has a screw thread (4) with a pitch (p). In order to ensure a reliable engagement of the screw thread with the thread teeth even in the case of small diameters, the spacing of the thread teeth (2) corresponds to an adapted pitch (p) which is adapted to the pitch (p) of the screw thread (4) in the curved state of the clamp band (1).

Claims

1. A hose clamp having a clamp band into which are introduced multiple thread teeth which follow one another at a respective spacing and into which a clamp screw of a clamping device of the hose clamp is movable into engagement in order to tension the clamp band, wherein the clamp screw comprises a screw thread with a pitch (p), and wherein the spacing between the thread teeth corresponds to an adapted pitch (p) which is adapted to the pitch (p) of the screw thread in a curved state of the clamp band.

2. The hose clamp as claimed in claim 1, wherein the adapted pitch (p) is unequal, in particular is smaller or greater than the pitch (p) of the screw thread, in a flat state of the clamp band.

3. The hose clamp as claimed in claim 1, wherein the adapted pitch (p) becomes increasingly greater or smaller from thread tooth to thread tooth in a draw-in direction of the clamp band into the clamping device.

4. The hose clamp as claimed in claim 1, wherein the spacing between adjacent thread teeth with respect to one another changes with a correction quotient.

5. The hose clamp as claimed in claim 4, wherein the correction quotient changes in dependence on a run-in depth of the clamp band into the clamping device.

6. The hose clamp as claimed in claim 1, wherein the thread teeth comprise a height (h) in a flat state of the clamp band, wherein the height (h) includes a value of between 0.5 mm and 10 mm.

7. The hose clamp as claimed in claim 6, wherein the clamp band comprises a neutral fiber (NF) with a height (hNF), to which the following is applicable: [0-0.5*h]<hNF<h or h<hNF<[h+0.5*h].

8. The hose clamp as claimed in claim 1, wherein the thread teeth are introduced into the clamp band by means of a forming process, in particular by means of an embossing process or deep drawing process, wherein the spacings between the thread teeth are predetermined in particular by means of an embossing or deep drawing tool.

Description

PREFERRED EXEMPLARY EMBODIMENTS

[0019] Further measures which improve the disclosure are shown in more detail below together with the description of a preferred exemplary embodiment of the disclosure by way of the figures, in which:

[0020] FIG. 1 shows a clamp band of a hose clamp in a flatly stretched-out state with thread teeth which are realized in a conventional manner,

[0021] FIG. 2 shows the side view of a clamp screw for a clamping device of a hose clamp,

[0022] FIG. 3 shows a clamp band in a curved state,

[0023] FIG. 4 shows a clamp band with thread teeth, wherein the clamp band is shown in a flat state and wherein the thread teeth are at spacings according to the disclosure with respect to one another which result in a pitch which deviates from the pitch of the clamp screw according to FIG. 2.

[0024] FIG. 1 shows a clamp band 1 of a hose clamp according to the prior art in a flat, stretched-out state. Multiple thread teeth 2, which can be produced, for example, as a result of punching-out, notching or the like from the flat clamp band 1, are realized on the top side of the clamp band 1. The individual thread teeth 2 are at a spacing to one another which corresponds to a pitch p. The individual thread teeth 2 are each at an identical spacing to one another such that the pitch p does not change from thread tooth to thread tooth along the clamp band 1.

[0025] The thread teeth 2 comprise a height h. In this case, further height specifications are marked.

[0026] FIG. 2 shows a clamp screw 3 as is used in a clamping device of a hose clamp. The clamp screw 3 comprises a screw thread 4. The screw thread 4, in this case, has a constant pitch p.

[0027] FIG. 3 shows the clamp band 1 according to FIG. 1 (prior art) in an arrangement which is curved with a radius R. The outwardly pointing thread teeth 2, in this case, tower above the clamp band 1 such that the pitch changes by a pitch change p when the clamp band is bent. Due to the increasing curvature introduced into the clamp band 1 during tensioning, the spacing between the thread teeth and consequently the actual pitch increases. If the clamp band 1 runs further into the clamping device when tensioned further, the clamp screw 3 is no longer able to engage in the thread teeth 2 in a geometrically precise manner with its unchanged pitch p due to the pitch change p taking place.

[0028] FIG. 4 shows a clamp band 1 of a hose clamp which has been further developed according to the disclosure. Four thread teeth 2 are shown on the top side of the clamp band 1 as an example.

[0029] The two central thread teeth 2 are spaced apart from one another at the pitch p, a spacing between the thread tooth 2 shown on the left-hand side and the second, adjacent thread tooth 2 is increased by the amount of the pitch change p such that an adapted pitch p is produced. Said design is provided in the case of radially inwardly directed thread teeth, the tips of which lie radially inside the neutral fiber of the curved clamp band.

[0030] The third thread tooth 2 comprises a smaller spacing or a smaller pitch with respect to the last, fourth thread tooth 2 which is determined by the pitch p according to the clamp screw 3 minus the pitch change p. Said design is used in the case of radially raised thread teeth, the tips of which lie radially outside the neutral fiber of the curved clamp band. The stronger the curvature of the clamp band 1 and the smaller the radius R, the stronger the effect of the extent of the head regions of the thread teeth 2 with respect to one another.

[0031] The invention is not restricted in its realization to the preferred exemplary embodiment provided above. Rather, a number of variants are conceivable which use the solution shown even in the case of fundamentally different realizations. All features and/or advantages emanating from the claims, the description or the drawings, including structural details or spatial arrangements, can be essential to the invention both in their own right and also in the various combinations.