DE2006332B2 - Clamping device for shafts with a smooth surface - Google Patents

Description

F i g. 1 is a plan view of the clamping member,

F i g. 2 shows an axial section through the on a shaft pushed-on clamping member according to FIG. 1, and

F i g. 3 shows, on an enlarged scale, a partial section through the clamping element according to FIG. 1.

The clamping member shown is a flat, cup-shaped shell that is formed by deforming an annular disk 1 is formed. This washer has an angled outer edge 2, which is slightly higher than a central, substantially frustoconical projection. This cantilever is open by two A common diameter line 4 lying radial slots divided into two clamping tongues 5 and 6. The clamping tongues 5, 6 each encompass the smooth surface of a at an angle of approximately 120 ° Shaft 3, onto which the clamping element for axially securing a machine part 11 via a central one Hole of the washer is pushed.

Each of the two clamping tongues 5, 6 has a comparatively short radial extension and is at 9 bent in a direction opposite to its root 8, so that there is a line contact with the upper shaft for the contact edge 10 area results. The angled outer edge 2 gives the clamping tongues 5, 6 a substantially at its root 8 concentrated bias, which then over the respective kink to the relevant Contact edge 10 is derived. This bias can be generated, for example be that the clamping tongues before hardening in the perpendicular to the diameter line 4 Diameter line 7 by a small amount to one

ίο smaller than the nominal diameter of the shaft 3 Diameter are compressed. Is the clamping member in the manner shown in FIG pushed onto the smooth surface of a shaft, then along the contact edge 10 of the two clamping tongues 5, 6 generated clamping forces by their concentrated bias near the axis are caused. For the deliberate loosening of the clamping member, it is only necessary to apply it a pair of pliers along the diameter line 4 to spread open the two clamping tongues 5, 6 slightly. whereby the clamping member is then removed from the shaft for repeated use can be.

1 sheet of drawings

Claims (1)

Ends of the two radial slots is weakened, he patent claim: gives this distribution of forces comparatively low Clamping forces so that the spring tongues easily up to Clamping member in the form of an annular disk to completely cancel the clamping function a central, essentially truncated cone 5 are bent. shaped and a resilient clamping function on this tendency to bend also have the smooth surface of a central hole the spring tongues of such a protrusion exerting, for example, from the German penetrating shaft, see utility model 1 678 036 or the German utility model 1 900 047 see in line contact with the shaft surface and which stands by two washers on a common io, which at an otherwise essentially flat major knife line in two designs by means of an edge-side angled shape, the shafts are each strengthened by more than 90 ° and less. Such a reinforcing edge results in 180 °, preferably by about 120 ° in each case, in only a higher, edge-side rigidity of the ring symmetrical arrangement to the diameter disk, which is rather divided by the clamping tongues acting on the spring tongues, rather than lowering them to an earth characterized in that the elevation of the same contributes. As a result of this higher outer edge (2) of the ring washer (1) in per se rigidity of the outer edge results for the known way essentially on the axial wanted loosening of these multi-tongued spring washers, the height of the projection is angled, and further disadvantage that the Spring tongues to ensure that each of the short 20 in the radial extension of their clamping function must be severely deformed by the angled clamping tongues (5, 6) that a repeated outer edge (2) abandoned, close to the axis use of the spring washer is not possible.
has concentrated bias and to their The invention is therefore based on the object defined contact edge with the shaft upper the clamping member of the type mentioned so surface is bent (at 9). 25 to train that it is easiest, with regard to the clamping tongues of non-destructive releasability has a comparatively stronger clamping force. This object is achieved according to the invention solved that the outer edge of the ring washer in a manner known per se essentially on the axial The invention relates to a clamping member in the height dimension of the projection is angled, and that the shape of an annular disc with a central, in each of the short clamping in the radial extension is essentially frustoconical and a resilient one due to its angled outer edge clamping function on the smooth surface of a one abandoned, Has near-axis concentrated pretensioning the shaft penetrating through the middle hole 35 and to its defined contact edge overhang, which is bent in line with the shaft with the shaft surface.
surface and which are shared by two on one. It becomes one as a flat, bowl-shaped bowl seed diameter line lying radial slots in trained clamping member proposed in your two the wave each by more than 90 ° and less the angled outer edge the spring forces speials 180 °, preferably by 120 ° in each case, in symmetry and they are evenly distributed over the Trical arrangement to the diameter line includes the root of the two clamping tongues concentrated, from sending clamping tongues is divided. where they mediate the respective kink One derived from the German patent specification 1,115,531 to the relevant contact edge known clamping member of this type is a ringför- to be. Because the clamping tongues are also short Mige spring washer with a flat, comparatively 45 radial extension, becomes a side narrow Outer edge, over which the clamping forces break out towards the middle along the a comparatively flat truncated cone part largely underscores the radially extending tongue edges. This truncated cone part is bound by the two, so that a much improved clamping mechanism wedge-shaped from the outside to the inside narrowing function is obtained. The stress distribution is Radial slots in two radially extending 50 at the same time so designed that for a deliberate equally long spring tongues divided, the release of which the clamping member only along the Durchradialc Edges in symmetrical from the two razor lines, symmetrical to which the two Dialschlitzen outgoing, in the truncated cone base clamping tongues lie, one radially inward we run End cross slots. The outer kende compressive force on the cup-shaped shell at-ends the radial slots are made by approximately half-55 for example by means of a tongue circular punchings of the flat outer edge must be made along this diameter line formed, in which the deliberate release of the spring is. This then makes the two clamping discs a round finger pliers is used, slightly spread at conditions, so that the clamping member whose compression the two spring tongues while maintaining a repeated use of each other be splayed. Which can be removed from the shaft in the plug-on option th state can act on the spring tongues. There are also such tensions Clamping forces are directed towards the flat outer edge, that each for sliding onto a shaft derived, whereby they are tempted to run along the radia- and the deliberate loosening of this disadvantageous Neile Break out tongue edges laterally. Because the tendency to twisting the ring disc is far-elastic which is excluded because of its comparatively large 65. Radial length of highly elastic spring tongues uiirch the An embodiment of the invention is in the Cross slots continue to increase, and as the planar drawing is shown schematically and is directed towards the outer edge described in more detail below by the punchings on the outer ones. It shows