FR2626048A3 - CLUTCH THRUST BEARING - Google Patents

Abstract

The invention relates to clutches. This thrust bearing is made up of a ball bearing with a single row of balls 3, with a radial-oblique contact line, the inner ring 1 of which is in contact with the diaphragm 6 of the clutch via a support ring 5. For avoid rotation between the diaphragm, the auxiliary spring 7 and the inner ring 1, the spring 7 has outer teeth engaged in intervals between the legs of the diaphragm and inner teeth 9 engaged in grooves 10 of the ring 1. The teeth external 8 are offset by half a pitch relative to the internal teeth 9. Main application: heavy utility vehicles and tractors.

Description

Clutch thrust bearing.

  The invention relates to a clutch abutment

  of the drawn type which is particularly intended for action-

  clutches of trucks and tractors.

  In the clutch mechanisms of the contruction

  the play between the support ring and the di-

  the speed of the clutch is compensated with 1

  auxiliary conical fate that transmits the couple by

  between the diaphragm of the clutch and the ring

  the bearing, and this inner ring rotates. Unfortunately, this form of

  does not prevent the inner ring from rolling

  and the diaphragm support ring of the clutch of

  turn relative to each other in the presence of a

  motor, which leads to excessive wear on the

  clutch diaphragm engagement faces and the

  bearing, excessive heating of the bearing and the production of metal filings which seep into the bearing and, in the long run, may

destruction of this bearing.

  The aforementioned drawbacks are eliminated, to the most extreme extent known until now, by a clutch abutment according to the invention which is composed

  from a ball bearing to a row of logs and to

  radially-oblique contact pin, and whose inner ring is in contact with the diaphragm of the clutch by

  through the support ring. A characteristic es-

  of the invention in addition to the fact that the diaphragm

  andthe inner ring of the bearing is disposed on the roll side

  an auxiliary spring which is engaged on the one hand and by means of at least two external projections in

  the intervals between the legs of the diaphragm and,

  on the other hand and by means of at least two interior protrusions

  in the grooves formed in the outer surface

  re of the inner ring of the bearing. The protrusions

  with the longitudinal axis of the bearing an angle that is less than 90. Another feature of the invention

  consists in the fact that the outer projections are

  angularly, on the outer perimeter of the auxiliary spring, half of their angular

compared to the inner projections.

  The advantage of the clutch abutment according to the in-

  tion consists in particular in the total deletion of

  the slippage between the inner ring of the wheel

  and the diaphragm of the clutch, which avoids the

  production of filings and the overheating of

  and has a strong influence on longevity

of the last.

  The clutch abutment according to the invention is

  schematically presented in the attached drawing, on the-

  which: Figure 1 is an axial section of the stop; Figure 2 is a view of the abutment taken in an axial direction;

  FIG. 3 is an axial view of the auxiliary spring

iary; and

  FIG. 4 is a section of the auxiliary spring

re.

  The clutch abutment shown in FIGS.

  res 1 and 2 is composed of a ball bearing with a row of balls, with a radial-oblique line of contact,

  whose inner ring 1 is mounted by means of

  3 balls in the outer ring 2 which is itself

  even connected at its outer periphery, to a lever for actuating the clutch, not shown, while at its inner periphery, it is connected to a sleeve slidably mounted on a not shown gear boot shaft . The inner ring 1 of the bearing is extended in the axial direction and,

  on its end, is mounted by means of a ring of

  4, the support ring 5 which is pressed against the dia-

  6. Between the diaphragm 6 and the inner ring 1 of the bearing is interposed an auxiliary spring 7 in the form of a conical spring which is enqaqc

  because its outer projections 8 in the intervals 11 pre-

  seen between the legs of the diaphragm 6 and by its projections

  9 in the axial grooves 10 formed on the

  outer surface of the inner ring 1 of the wheel

  is lying. In the case shown, the projections 8, 9 are

  the longitudinal axis of the bearing, but in a

  other possible form of realization, they may

  sea with the longitudinal axis of the bearing a certain angle

  less than 90, which affects the

  sition and sizing of the bearing surfaces 12 that

form the flanks of the grooves 10.

  The auxiliary spring 7 shown in FIGS.

  3 and 4 has on its outer periphery four outer projections 8 uniformly distributed and, on its inner periphery, four inner projections 9 which

  are angularly offset by half of their

  gular with respect to the external projections. In

  other possible form of the auxiliary

  7, the number of projections 8, 9 can be adapted as required, provided that a minimum number of two pairs of projections 8, 9 are retained. Notches 13, oriented in the radial directions, are evenly distributed on the periphery inside the auxiliary spring 7,

  these notches providing the spring with sufficient elasticity

health in the axial direction.

  In the operation of the clutch abutment according to the invention, under the effect of the bearing pressure of the auxiliary spring 7 in the direction of the bearing ring, the axial clearance between the bearing ring 5 and the diaph -

  is removed, the drive of the inner ring is

  re 1 during the rotation of the diaphragm 6 being ensured,

  not only by the friction between the precise elements

  but also by the action of external projections 8

and inner projections 9.

R E V E N D ICATIONS

  1. Clutch release bearing consisting of a bearing

  single-row marbles and line of contact

  diale-oblique, and whose inner ring is in contact with the diaphragm of the clutch via the bearing ring, characterized in that, between the diaphragm (6) and the inner ring (1) of the bearing, is disposed, on the bearing side, an auxiliary spring (7) which

  engaged, on the one hand and by means of at least two

  outer lugs (8), in the gaps (11) between the lugs of the diaphragm (6) and, on the other hand and by means of at least two inner projections (9), in the grooves (10) formed on the surface outer ring (1) of the bearing, the projections (8, 9) forming with the longitudinal axis of the bearing an angle

which is less than 90.

  Clutch release bearing according to Claim 1, characterized in that the outer projections (8) are angularly offset on the outer periphery of the clutch.

  auxiliary spring (7) by half their angular pitch.

  re relative to the inner projections (9).