FR2611006A1 - FRICTION BLOCKING ELEMENT - Google Patents

Abstract

THIS IS A FRICTION LOCKING RING 10 FRICTIONALLY ENGAGING WITH TWO PIECES 16, 20 RADIALLY SPACED FROM EACH OTHER; THE RING 10 PRESENTING AN INNER FACE AND AN EXTERIOR FACE AND IS DEFORMED IN A RADIAL PLANE R WITH RESPECT TO A PERFECTLY CIRCULAR SHAPE SO THAT IT ENGAGES WITH THE FIRST 16 IN DISCONTINUOUS ZONES AROUND ITS INNER FACE AND WITH THE SECOND 20 DESSENTED ROOMS IN DISCONTINUOUS ZONES AROUND ITS EXTERIOR FACE. ACCORDING TO THE INVENTION, THE RING 10 INCLUDES TWO OR MORE PARTS THAT EXTEND AXIALLY WITH RESPECT TO THE RADIAL PLANE ON A FIRST SIDE FACE 10A, TO PROVIDE AN AXIAL RETENTION FORCE F WHEN POSITIONED BETWEEN THE RADIAL FACES 24, 28 FIRST AND SECOND PIECES 16, 20.

Description

FRICTION BLOCKING ELEMENT

  The present invention relates to locking elements which fix one to another two parts by frictional engagement between the locking element and the parts, and it relates in particular to a locking element capable of exerting on said parts of both radial and axial retaining forces. Blocking elements of the type described in British Patent No. 1,393,257 are generally interposed in

  10 a radial clearance provided between a first and a second part.

  According to one application, one of the pieces can be a tree,

  and the other a sleeve that must be attached to the tree. The the-

  The friction locking element consists of a ring which can be complete or have a radial slot, which is in the form of an "imperfect circle". This means that the locking ring comes into contact in spaced areas around

  its outer periphery with a radially

  outside, and comes into contact with

  around its inner periphery with a part in a radially inner position. Frictional engagement

  the locking ring with the two parts ensures the

  mutual registration of the parts and prevents their unplanned decoupling. The blocking element described above, if it provides

  an adequate radial retaining force can not in

  applications provide an adequate axial restraint

  quate. The present invention aims to provide a blocking element that reduces and if possible eliminates the problem

  presented by the aforementioned blocking element.

  This locking element is of the type of a ring

  frictionally engaging with a radially inner piece having an axially extending face and a radially outwardly extending face, and with a radially outer piece having a extending face.

  axially and a face extending radially inwards

  the ring comprising a radially inner face, a radially outer face, a first lateral face and a second lateral face, the ring deviating in a radial plane of a perfectly circular shape and being provided on its radially inner face with at least two equidistant parts that engage by friction with the

  axially extending portion of the radially integral part

  and at its radially outer side at least two equidistant portions which frictionally engage the axially extending part of the radially outer part. According to the invention, the ring deviates from the radial plane and has on its first lateral face at least two equidistant parts which extend in the axial direction and frictionally engage with the radially extending portion of the piece radially. inside and on its second side face at least two equidistant parts

  who engage in friction with the part extending

  dialement of the radially outer part. According to an additional characteristic, the ring has a

  undeformed axial width which is greater than

  between the radially extending parts of the

first and second pieces.

  The present invention will hereinafter be described by way of example only with reference to the accompanying drawing, in which: Figure 1 is a view of the locking ring according to the present invention, Figure 2 is a side view of the locking ring in the direction of arrow A of Figure 1; Figure 3 is a cross-sectional view of the

  ring in the direction of the arrows CC in Figure 1,

  the ring retaining an annular body in a

  ment; and Figures 4 and 5 show two embodiments

different from the locking ring.

  according to FIG. 1, a ring 10 has a face

  radially inner 12 and a radially outer face

  14, and it is deformed in a radial plane R (FIG. 2) with respect to a perfectly circular shape so that it engages with a first part 16 in discontinuous zones around its inner face 12 and with a second piece 20 in discontinuous areas around its outer face 14. According to Figures 2 and 3, the ring 10 is deformed relative to the radial plane R of such

  so that two or more equidistant parts 22 extends.

  tooth in an axial direction A on a first face 10a of said ring 10, thus giving the ring a width

  axial axis W. In more detail, Figure 3 shows that the

  first and second parts 16, 20 each have surfaces

  24,28 extending radially and surfaces 26,30 extend

  axially and between which is positioned the ring; these parts are configured and dimensioned so

  to communicate with each other in any desired way.

  In use, the ring 10 is positioned between the first and second pieces 16,20 so that its

  inner face 12 and its outer face 14 enter

  in contact with the first piece 16 and with the

  second piece 20, as described above, and that its first

  first and second faces 10a, 10b respectively come into contact with the radial surfaces 24, 28 of the first and second

second pieces 16,20.

  It should be noted that in order to exert a valid radial holding force FR on the first piece 16, it

  is necessary to give the radial width undistorted

  M e B of the ring 10 a value greater than the distance H between the axial surfaces 26, 30 of the first and second parts 16,20 between which is positioned the ring. An axial retention force FA can be exerted by giving to

  the undeformed width W of the ring 10 has a value greater than

  greater than the distance D between the radial faces 24,28

26,1006

  first and second pieces 16,20.

  In practice, it is desirable to provide a ring 10 which is not continuous, and the gap 32 between the two ends 10d and 10e of the ring must be sufficient to allow the ring to deform in use without the ends come into contact with each other. Throughout this presentation, it must be understood that the term ring includes a ring

which is not continuous.

  It should be noted that in order to position the ring 10 between the two parts 16,20, it is necessary to reduce the outside diameter to d when the o

  Ring. This can be achieved by any means

  ventional, interval 32 assisting in this operation.

  According to Figures 4 and 5, the ring 10 can be configured in various ways. FIG. 4 shows a ring 10 which comes into contact with the first piece 16 in three zones P around its inner edge, and with the

  second room in three zones Q around its outer edge.

  laughing. FIG. 5 shows a ring 10 of different shape

  ferent, who comes into contact with the first

  first and second parts 16, 20 along extended areas M and N respectively of its inner edge and its outer edge. Such an increase in the contact area considerably increases the restraining forces that the

ring 10 is able to exercise.

Claims (2)

- CLAIMS -   1. Friction locking ring for frictional engagement with a radially inner part having   an axially extending face and a face extending   outwardly, and with a radially outer part having an axially extending face and a radially inwardly extending face, the ring   comprising a radially inner face, a radial lace   an outer ring, a first lateral face and a second lateral face, the ring extending in a radial plane of a perfectly circular shape and being provided on its radially inner face with at least two equidistant parts which engage by friction with the axially extending part of the radially inner part, and on its radially outer side at least two equidistant parts which frictionally engage with the   axially extending part of the radially   characterized in that the ring (10)   radial plane (R) and has on its first lateral face   at least two equidistant portions (22) extending axially and engaging by friction   with the radial part (24) of the radially inte-   upper (16) and on its second lateral face (10b) at least two equidistant parts which frictionally engage with the radial portion (28) of the radially outer piece (20).   2. Friction locking ring according to the claim   1, characterized in that the ring (10) has an undeformed axial width (W) which is greater than the distance between the radial portions (24,28) of the first and second pieces (16, 20).