FR2664949A1 - STOP DEVICE PREVENTING THE LOOSENING OF NUTS OR MOBILE ELEMENTS IN ROTATION. - Google Patents

Abstract

In the stop device, the stop plate (7, 8) is connected by formally complementary to a machine element (1) as well as to the element (6a, 6b) to be stopped. In order to allow frequent loosening of the stopper without breaking any part, and easy assembly and disassembly of the device, the stopper plate (7, 8) is made of spring steel, which can be raised in the axial direction, disposed at a distance from the element (6a, 6b) to be stopped and provided with protrusions which penetrate into notches of the element (6a, 6b) to be stopped. Application: Especially in rolling bearings

Description

The invention relates to a stop device for nuts or elements

  movable in rotation to prevent loosening, in particular for rolling bearings, in which the stop plate is complementarily connected to a machine element and

the item to stop.

  Such stop devices are already known, for example from document US-A-3,294,141, which describes a stop device for a nut by means of a stop plate provided with tongues on its outer edge of which at least one is folded after the tightening of the nut, until it is applied against a surface of the nut. This known nut stop device has the disadvantage that it is necessary to

  axially block the stop plate and the tongue breaks easily

  during frequent loosening of the shutdown device

  in addition, the folding of the tongue is relatively complicated.

  The object of the present invention is to create a device for

  type early, which can be loosened frequently without the risk of breakage of any elements and which is also easy

to assemble and disassemble.

  According to the invention this object is achieved by the fact that

  the stop plate is made of spring steel, capable of being

  in the axial direction, arranged at a distance from the element

  and with projections that penetrate into notches in the

  This allows the stop device to be lifted by a

  axial pressure and bring it out of grip.

  According to another characteristic of the invention, the diameter of the hole of the stop plate is smaller, in the unmounted state, than the diameter at the bottom of the groove of the annular groove.

  diameters makes it possible to modify the latching effect.

  Starting from the hole, the stop plate also has radially oriented slots, which lengthen the elastic path

axial and facilitate the lifting.

  According to particular embodiments and aspects not

mitatives of the invention:

  1) the stop plate can be placed in an annular groove

  the wing of a machine element; 2) the stop plate may have protrusions cut from

  outer edge which are bent in the direction of the element

  to stop, are elastic in the axial direction and penetrate into notches of the element to be stopped; 3) the element to be stopped can have, on its side facing the outer ring of the bearing, a plurality of notches distributed around its circumference and having surfaces in the form of sawtooth, and that each time a projection penetrates into the notches; 4) The stop plate may be provided on its outer edge with

  radially oriented teeth, at least one of which penetrates into a ra-

  axial clearance in the envelope of the element to be stopped; ) the element to be stopped can be a nut with a conical threaded portion, which is mounted on an enlarged inner ring, in

  view of the attachment of the latter on a shaft or of the solid link

  rotate the ends of two trees.

  The invention is described below in more detail with the aid of two exemplary embodiments illustrated by the drawing, on which

  FIG. 1 represents a section of a ball bearing with

  integrated shaft coupling, Figure 2 shows a sectional view of a portion of the inner ring with the fixing nut and the nut stop device according to the invention,

  FIG. 3 represents a partial plan view of the

  FIG. 4 shows another embodiment of a nut stop device according to the invention, in a sectional view,

  FIG. 5 represents a partial plan view of the

  Figure 6 shows a side view of the nut stop device shown in Figures 2 and 3, and Figure 7 shows a side view of the stop device.

  nut shown in Figures 4 and 5.

  Figures 1 to 7 show nut stop devices for ball bearings with an enlarged inner ring 1, which at the same time serves as a coupling sleeve for the ends of the

  At both ends, the inner ring 1 is

  for example two diametrically opposite slots 4 (FIG. 2) and a conical threaded portion 5a on which a fastening nut 6a, 6b is screwed each time with a threaded portion 5b The fastening nut 6a 6b is blocked by a stop plate 7 or 8 which can be raised in the axial direction, penetrates an annular groove 9 of the inner ring 1 and is immobilized against rotation by tongues 10 A unassembled state, the diameter of the hole A of the stop plate 7 or 8 is smaller than the diameter B at the bottom of the groove of the annular groove 9, so that the stop plate 7 or 8 is mounted with a radial preloading on the inner ring 1 The stop plate 7, 8 is disposed at a distance C from the fixing nut 6a, 6b to be stopped and consists of a sheet metal plate similar to a steel diaphragm. springs,

  comprising a concentric hole 11 and diametrical tabs 10

  opposed to each other, which were kept when cutting the hole 11.

  The distance C can be modified within certain limits and thus also allows a variable axial disposition of the fixing nut 6a, 6b Starting from the hole 11, the stop element 7, 8 is provided with slots 12 oriented radially. , which facilitate the lifting in the

  axial direction On its outer edge, the stop plate 7 pre-

  radial notches through which are formed

  Elastic limbs 14, bent in the direction of the securing nut 6 a.

  When raising the stop plate 7, the projections 14 bent

  penetrate into notches 15 having surfaces 16, 17 in the form of

  saw teeth and immobilize the fastening nut 6a against the rotation

  After the screwing of the latter onto the threaded portion 5a of the inner ring 1, the saw-tooth-shaped surfaces 16, 17 make it possible to tighten the fastening nut 6 even further after detenting the projections. 14, because the latter are then elastic in the axial direction and snapping into the next notch Loosening of this stop device is by axial pressure on the stop plate 7 towards the center of the bearing, so that the plate is raised (indicated in phantom in Figure 2) and the portions 14 bent leave the notches This tilt allows to loosen very quickly and as often as desired the stop device preventing rotation In addition, the tolerances of the elements connected to each other have not

  no importance in the nut stop device according to the in-

  The tongues 10 penetrate into slots 4 of the ring

  1 and immobilize the stop plate 7 against rotation.

  The stop plate 8 shown in Figure 4 differs from the embodiment of Figure 2 only in that the

  portions 14 cubits are replaced by teeth 19 oriented ra-

  The locking of the stop plate 8 in the grooves and its disengagement therefrom is done as in the embodiment according to FIG. 2, in which at least one penetrates into a groove 20 for a hook wrench. by simply lifting the plate

  stop 8 (indicated in phantom) in the axial direction.

  The invention is not limited to the exemplary embodiments of

  written above Changes in the construction of different

  elements are quite possible without departing from the framework of

tion.

  1 Locking device for nuts or rotating elements for preventing loosening, in particular for rolling bearings, in which the stop plate is connected by complementary shape to a machine element and to the element to be stopped, characterized in that the stop plate (7, 8) is made of

  springs, capable of being raised in the axial direction,

  placed at a distance (C) from the element (6a, 6b) to be stopped and provided with

  projections (14, 19) which penetrate into notches (15, 20) of the

(6 a, 6 b) to be stopped.

  2 stop device according to claim 1, characterized in that the stop plate (7, 8) is arranged in a groove

  ring (9) of a machine element (1).

  Stop device according to claim 1 or 2, characterized

  due to the fact that in the unassembled state, the diameter (A) of the hole of the stop plate (7, 8) is smaller than the diameter (B) at the bottom

  throat of the annular groove (9).

  4 Stop device according to any one of the claims

  1 to 3, characterized in that, starting from the hole (11), the

  plate (7, 8)) has radially oriented slots (12)

  is lying. Stop device according to any one of the claims

  1 to 4, characterized in that the stop plate (7)

  protrusions (14) cut on its outer edge which are bent towards the element (6a) to be stopped, are elastic in the axial direction and penetrate into notches (15) of

the element (6a) to be stopped.

  Stop device according to claim 5, characterized

  in that the element to be stopped (6 a) has on its face

  born to the outer ring (18) of the bearing, several notches (15) distributed over its circumference and having surfaces (16, 17).

  in the form of saw teeth, and that each time a protrusion (14)

enter in the notches (15).

  7 Stop device according to any one of the claims

  1 to 4, characterized in that the stop plate (8) is provided on its outer edge with radially oriented teeth (19).

  at least one penetrates an axial groove (20) in the housing.

  loppe of the element (6b) to stop.

  8 Stop device according to any one of the claims

  1 to 7, characterized in that the element (6 to 6 b) to be stopped is a nut with a conical threaded portion (5b), which is mounted on an enlarged inner ring (1), in order to attaching it to a shaft (2, 3) or to the rotationally solid connection

ends of two trees.