FR2525983A2 - DAMPING DEVICE FOR TRUCK DRIVING MECHANISM OF A TRACKED VEHICLE, IN PARTICULAR A SHUTTLED TRUCK, AND TRACKING MECHANISM OF TRACK EQUIPPED WITH SUCH A DEVICE - Google Patents

Abstract

THE INVENTION RELATES TO A DAMPERING DEVICE FOR A TRACK DRIVE MECHANISM OF A TRACKED VEHICLE, IN PARTICULAR OF AN ARMORED TANK, AND A TRACK DRIVE MECHANISM EQUIPPED WITH SUCH A DEVICE. IN THIS DEVICE, CONSISTING OF ONE OR MORE SHOCK ABSORBING RINGS BASED ON THE DRUM OF A SPROCKET AND POSSIBLY ON THE PERIPHERAL SURFACE OF A RETURN WHEEL, THE SHOCK ABSORBER RING INCLUDES AN EXTERNAL 8A STEEL RING AND AN INTERNAL STEEL RING 8B CONNECTED TO ONE ANOTHER BY AN INTERMEDIATE LAYER 8C IN AN ELASTOMER SUCH AS A RUBBER. APPLICATION IN PARTICULAR TO TRACKED MILITARY VEHICLES.

Description

The present invention relates to a device for damping the

  a drive mechanism for the tracks of a tracked vehicle, in particular an armored car, of the type described in the main patent, this mechanism comprising a track which passes over a driving wheel or sprocket, a idler or idler wheel and wheels carriers or rolling wheels, and whose links are connected by extreme joining elements, the gypsy having a drum and toothed rings which are engaged with said connecting elements, said device, intended to damp the caterpillar at the moment when it comes into engagement with said sprocket,

  component of one or more damping bushings

  feel on the drum of the gypsy and possibly on the

  peripheral surface of the idler wheel, the

  of the damping ring being larger than the

  outer diameter of the sprocket drum and possibly

  of the idler wheel and being determined, with respect to the track pitch and its winding angle, so that the connecting elements and / or chain links which engage the sprocket apply to this ring before applying to the crowns and / or the

drum of said gypsy.

  The device proposed by the main patent

  be improved in order to increase the cushioning effect

  damper ring and to reduce the production

of noises.

  According to the invention, this object is achieved by the fact that the damping ring consists of outer and inner steel rings which are connected to one another by an intermediate layer of an elastomer, for example a rubber This results in the particular advantage that the

  damping ring has, in addition to the amorphous properties

  elastic properties which characterize the steel rings, the good properties of elasticity and damping proper of an elastomeric material, without this subject being subject

  excessive bending stress.

  In a preferred embodiment, the thickness of the damping ring is dimensioned so that the steel outer ring projects beyond the

  bottom of the toothed crowns of the sprocket This agency-

  The advantage of the invention lies in the fact that the stress or stress imposed on the damping ring remains limited only to the elastic damping of the links of the track when they come into contact with the sprocket. The elastomeric material undergoes an elastic deformation which corresponds only to the the external ring protrudes beyond the bottoms of the teeth. Under these conditions, the damping ring is not exposed to tensile forces of

Caterpillar.

  According to another characteristic of the invention, the inner surface of the inner steel ring forms a sliding bearing gap with the outer surface of the

  drum sprocket or idler wheel.

  The invention will now be described in more detail by way of non-limiting example with reference to the accompanying drawing in which the single figure is a sectional view.

  fragmentary of a damping ring.

  The damping ring comprises an outer radial ring of steel 8a and an inner radial ring of steel

  8b, as well as an intermediate layer 8c made of an elastic material

  tomère, for example rubber, which links together

the two steel rings.

  In use, the links of the crawler or

  extremes of junction coming into contact with the barbo-

  firstly strike the outer ring 8a, which elastically absorbs the impact energy and which transmits it to the intermediate layer 8c elastomer In a manner

  known in itself, this combination of a steel and an elasto-

  mother allows to obtain, in addition to the good elasticity effect,

  good damping effect Because the

  medial support, via a steel inner ring 8b on the drum of the sprocket on which the damping ring can slide by rolling, it is safely excluded the occurrence of significant shear stresses

  acting circumferentially in elastic matter

  In known embodiments, in which the elastomeric material is attached to the gypsy, these shear stresses cause undue bending work and premature deterioration. On the other hand, in the damping ring according to the invention, the intermediate layer is, for the most part, only compressed periodically in the radial direction, stress to which the elastomeric material can withstand

  for a long time of use.

  To ensure that the damping ring always slides easily on the gypsy drum, in order to avoid shear stress imposed on the elastomer, the inner surface of the inner steel ring 81) and the outer surface of the gypsy drum can be made in the form of sliding bearing surfaces. This effect can

  still be improved by a lubricant.

  It goes without saying that many modifications can be made to the device described and shown, without

depart from the scope of the invention.

Claims (4)

  1 damping device for the drive mechanism of the tracks of a tracked vehicle, particularly a tank armored vehicle, this mechanism comprising a track that passes on a driving wheel or sprocket, a idler or idler wheel and wheels or rolling wheels, and whose links are connected by extreme connecting elements, the gypsy having a drum and toothed crowns which are engaged with said connecting elements, the device, intended to damp the caterpillar when it comes into taken with said gypsy, consisting of one or more damping rings which rest on the drum of the gypsy and possibly on the peripheral surface   of the idler wheel, the inside diameter of the bushing   weaving machine being larger than the outside diameter of the sprocket drum and possibly the idler wheel and being determined, with respect to the track pitch and its angle   winding, so that the connecting elements and possibly   Alternatively, or alternatively, the links of the chain that engage the sprocket apply to this   ring before applying to the crowns and, possibly,   Alternatively, on the drum of said sprocket, according to claim 1 of the main patent, characterized in that the damping ring consists of outer (8a) and inner (8b) steel rings which are connected to each other. to one another by an intermediate layer (8c) of an elastomer, for example a rubber.   2 Device according to claim 1, characterized in that the thickness of the damping ring is dimensioned so that the outer ring (8 a) steel is projecting beyond the bottom of the crown teeth teeth of the gypsy.   3 Device according to one of claims 1 and   2, characterized in that the inner surface of the inner steel ring (8b) forms a sliding bearing gap with the outer surface of the sprocket or wheel drum. of referral.   4 Device according to claim 3, characterized in that the inner surface of the inner ring of steel and the outer surface of the drum of the gypsy form sliding bearing surfaces.