DE2006332C3 - Clamping device for shafts with a smooth surface - Google Patents

Description

I / 2 006532

3 1

Fig. 1 is a plan view of the clamping member, surface results. Due to the angled outer rim

Fi |. 2 an axial section through which the clamping tongues receive on a shaft S. ^ ¹ JjZ ⁰ each

slipped clamping member according to Fig. 1, and on its root 8. ^^^ Z ^ Zfk.n-

3 shows a partial section, on an enlarged scale, then over the respective knirftsteUe M

by the clamping member of FIG. 1. 5 * the contact ^"te ^ Wta ta" ^ I generated

The clamping element shown is a flat, cup-preload can ^ P * ™ ^ _the hardening in

shaped shell, which by deformation of a ring become that d «Wemmamge,» standing

disc 1 is formed. This washer has one of the ^{D. hrough} _ ^{m "se} ™ _s ^never" ^ s _M ate a

angled outer edge 2, which is slightly higher than diameter hme 7 by "S ™ p ^.

a central, essentially frustoconical i. _{be tucked} towards the ^ ⁿ ^^ _a ° . is

Cantilever. This projection is _len by two to Neren diameter ™ "™ £ ^efl J j _way

a common diameter line 4 lying wheel the clamping member in the in ¹ ^ S J ' _lifted

dial slots in two clamping tongues 5 and 6 divided. on the smooth O ^^ J '^ äneskante 10 the

The clamping tongues 5,6 embrace at an angle then are along the ^ em "™" ¹¹

of about 120 ° each, the glaca surface of a 15 two clamping tongues S, 6 Wem ™ * ™

Shaft3, on which the clamping element is axially through its ~ »^ ^e ^« "^ S ^ _n _ ,."

Securing a machine part 11 are caused by a middle. To the g ^ew _{ie Au} .

Hole of the washer is pushed. Clamping organ. If necessary, ₄

Each of the two clamping tongues 5, 6 has a set ™%. ^Z ™ & ™^ ^g ₆ „ _{erin to be} opened up

comparatively short radial extension and is be. 9 - the be.den clamping tongues> 5 _; ^ 6 low gg ^

in a zen opposite with respect to its root 8, which means that η ^d « ^KIe ™ ^mo ^ [ _{e are taken} off

Angled in the direction, so that a line contact with the upper shaft of the shaft can be achieved for the contact mahge use of the white edge 10.

1 sheet of drawings

Claims (1)

Claim: Clamping member in the form of an annular disc with a central, essentially frustoconical and a resilient clamping function on the smooth surface of a central hole penetrating shaft exerting projection that is in line contact with the shaft surface stands and the radial slots lying on a common diameter line in two the shaft by more than 90 ° and less than 180 °, preferably by about 120 ° each, in symmetrical arrangement to the diameter line comprehensive clamping tongues is divided, characterized in that the outer edge (2) of the annular disk (1) is known per se Way is angled substantially to the axial height of the projection, and that each of the clamping tongues (5, 6), which are short in the radial extension, has one angled through it Outer edge (2) has abandoned, near-axis concentrated bias and to their defined contact edge with the shaft surface is bent (at 9). The invention relates to a clamping member in the form of an annular disc with a central, im essentially frustoconical and a resilient clamping function on the smooth surface of a one middle hole penetrating shaft exerting projection, which is in line with the shaft surface stands and the through two radial slots lying on a common diameter line in two the shaft by more than 90 ° and less than 180, preferably by 120 ° each, in a symmetrical manner Arrangement is divided to the diameter line comprehensive clamping tongues. A clamping member of this type known from German Patent 1115 531 is an annular one Spring washer with a flat, comparatively narrow outer edge over which it extends towards the center a comparatively flat truncated cone part rises. This truncated cone part is through the two, radial slots narrowing in a wedge shape from the outside to the inside in two radial slots for comparison long spring tongues split, their radial edges in symmetrical from the two radial slots outgoing transverse slots running in the truncated cone base end. The outer ones The ends of the radial slots are formed by roughly semicircular punchings on the flat outer edge formed, in which round finger pliers are used to intentionally loosen the spring washer the compression of which the two spring tongues are spread apart. The in the attached State acting on the spring tongues clamping forces are towards the flat outer edge derived, trying to break out along the radial tongue edges senüch. Since the Elasticity of the spring tongues, which are highly elastic because of their comparatively large radial length, by the Cross slits continue to increase, and since the flat outer edge through the punching out to the outer Ends of the two radial slots is weakened, this distribution of forces results in a comparatively low level Clamping forces, so that the spring tongues are easily bent over until the clamping function is completely canceled will. The spring tongues, for example from the German, also have this tendency to bend Utility model 1 678 036 or the German utility model 1 900 047 spring washers known, which, in an otherwise essentially flat design, is reinforced by an angled edge are. Such a reinforcing edge only results in a higher edge-side rigidity of the ring disc, which rather lowers the clamping forces acting on the spring tongues rather than increasing them the same contributes. As a result of this higher rigidity of the outer edge there is what is wanted Solving these multi-tongue spring washers the further disadvantage that the spring tongues for ao compulsory cancellation of their clamping function must be so severely deformed that a repeated Use of the spring washer is not possible. The invention is therefore based on the object, the clamping member of the type mentioned so to develop that there is a simplest, non-destructive releasability with regard to the clamping tongues has a comparatively stronger clamping force. This object is achieved according to the invention in that the outer edge of the annular disk in on is angled in a known manner essentially to the axial height of the projection. and that each of the clamping tongues, which are short in the radial extension, have one through the angled outer edge abandoned, near-axis concentrated preload and is bent towards its defined contact canoe with the shaft surface. It is thus proposed designed as a flat, cup-shaped clamp member in which the angled outer edge spci- chert and concentrates them evenly on the roots of the two clamping tongues, from where it is derived from the respective contact edge through the intermediary of the respective kink will. Because the clamping tongues also have a short radial extension, this becomes a lateral extension Breaking out of the clamping forces along the radially extending tongue edges largely prevented, so that a significantly improved clamping function is obtained. The stress distribution is at the same time designed so that for a deliberate loosening of the clamping member only along the diameter line, symmetrical to which the two clamping tongues lie, one acting radially inward Pressure force can be exerted on the cup-shaped shell, for example by means of a tongue must, which is set along this diameter line. This then sets the two clamping tongues slightly spread, so that the clamping member while maintaining a repeated use can be removed from the shaft. There are also such tensions before that each for the pushing on a shaft and the deliberate loosening of this disadvantageous tendency twisting of the annular disk is largely excluded. An embodiment of the invention is shown schematically in the drawing and is described below described in more detail. It shows