Joints and connections – Interfitted members – Radially interposed shim or bushing
Patent
1982-03-24
1986-05-20
Husar, Cornelius J.
Joints and connections
Interfitted members
Radially interposed shim or bushing
403374, 4034091, 411161, 411943, 474903, F16B 200, F16B 704
Patent
active
045897972
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a clamping disc or fixing member which can be securely clamped onto a shaft.
BACKGROUND ART
Such fixing members are known, for example from British patent specification No. 670,392 dealing with V-belt pulleys made from plate material and provided with a middle part formed as a fixing member of the type concerned. From the above patent specification also a similar fixing member is known adapted as such to cooperate with a V-belt pulley part shaped like such a fixing member.
Such fixing members have the great advantage that they can be stamped from sheet metal in a simple manner and, therefore are cheap to manufacture. Furthermore, such a fixing member, may easily be clamped onto a shaft. By means of bolts, which pass through holes in the fixing member and then are screwed into a counter member that, for example, may be a correponding fixing member provided with threaded holes, or which pass through holes in the counter member, extend into a fixing member arranged on the other side of the counter member. Further it has been shown that and provided a very fine tolerance between the center opening of the fixing member and the shaft exists the center opening may be narrowed to such a degree that the fixing member with its inner edge face grips the shaft tightly. The narrowing of the central opening arises upon flattening of the fixing member by tightening of the bolts. This arrangement may be procured easily and readily and results under such circumstances in such a firm clamping, that quite large torques can be transmitted through the connection provided between the fixing member and the shaft. Thus, it is even possible to use pulleys arranged with such fixing members as driver pulleys for large eccentric presses which, during each stroke, produce high torques and, therefore, require a very effective clamping effect.
For such a connection between a fixing member and a shaftlike element to transmit sufficiently large torques it is necessary, however, for the fixing member to fit into the shaft with such fine toletolerances that such shafts and fixing members cannot be obtained in practice by methods of mass production. Consequently, in practice, it has been shown that generally the known fixing members, whether used merely as fixing members or as parts of larger elements, can be used only in such cases where, compared to the diameter of the shaft, only relatively small torques have to be transmitted. Therefore, today such fixing members are only of little use, if of any use at all.
OBJECT OF THE INVENTION
The object of this invetnion is to provide a fixing member of the type discussed above, that is able to transfer to or from this element much larger torques than is possible by known fixing members after having been clamped onto a shaft or a shaftlike element without any particularly fine tolerances being necessary. It is also an object of this invention to be able to produce such fixing members by methods of mass production, such as, by stamping from metal It is also an object of this invention to find new fields of application for such a fixing member.
DISCLOSURE OF THE INVENTION
According to the invention these objects are achieved by the present invention which provides for a fixing member having a radial opening and being adapted to be clamped onto a shaft-like element passing through the opening by deforming the fixing member upon application of axial pressure. The fixing member comprises an outer truncated and normally generally conical portion converging in a direction towards the radial opening, the outer portion having an outer rim in contact with and adapted to be axially supported by an abutment member. The fixing member also includes an inner accordion-like portion integral with the outer portion, the inner portion terminating in an inner rim at the radial opening. the inner portion also includes radially outward extending folds with substantially flat portions between the folds. The inner rim has a wave-shape contour and is adapted to receive th
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Husar Cornelius J.
Williams Todd G.
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