FR2579696A1 - SUPPORT WITH A SUPPORT SYSTEM FOR THE SLIDERS OF PISTON MOTOR HOOKS - Google Patents

Abstract

THE INVENTION RELATES TO A SUPPORT WITH A SUPPORT SYSTEM FOR THE SLIDES OF CROSSES OF PISTON ENGINES. IN THIS SUPPORT, FRONT WALLS 4, ABSORBING THE NORMAL FORCES OF A LOCKING PIN 11, ARE SUPPORTED BY A BOX-SHAPED PROFILE INCLUDING SIDE WALLS 6 AND AN EXTERNAL WALL. IN THE VERTICAL SENSE, THE SIDE WALLS 6 EXTEND OBLIQUE OUTWARDS, FROM THE BOTTOM UP, TOWARDS THE FREE ENDS OF THE FRONT WALLS 4. APPLICATION IN PARTICULAR TO DIESEL ENGINE SUPPORT DEVICES.

Description

The present invention relates to a support system support for

  slideways for pistons piston bearings, this support comprising inclined external walls and vertical end walls between the base and cover plates which are connected to one another via side walls

  extending over the whole height, the said frontier walls

  tales having in addition to a part of their height, on their front faces facing each other, slides through which the normal forces are transmitted to the support to

  from the axis of the piston butt.

  So far, to absorb normal forces

  to be transmitted on the supports in a di-

  perpendicular rection to the slideways of pistons pistons pistons, in particular diesel engines, there are provided, on the rear face of the front walls, horizontal transverse ribs

  distributed over the height of the slides,

  vertical stiffening sounds extending at an acute angle between the ends of the end walls and the side walls (CH-A-625 603). Practice has revealed

  that the achievements described above are complicated.

  In addition, the type of embodiment sought for a piston engine must be as compact as possible; this requires the shortest possible distances between cylinders. In a well-known manner, these distances are in turn the sum of the necessary length of the main bearing, the length of the lower bearing of the connecting rod and the thicknesses of the counterweights of the two crank arms. Therefore, in order not to "lose" the length of the motor, it is necessary to collect as much as possible the side walls in part

low in the vicinity of the crankshaft.

  Therefore, the invention aims to simplify

  the overall design of a slider support system

  without implying, on the one hand, inadmissible distortions

  frontal walls and, on the other hand, the need

  increase the length of the engine. According to the invention, this object is achieved by the fact that the side walls, supporting in pairs a front wall, extend obliquely from bottom to top in the direction of

  ends of this front wall.

  It is well known that the normal forces acting on the slides, and therefore on the front walls, are maximum near the top dead center.

  piston stroke; the realization of the side walls

  According to the invention, this region gives rise to a relatively wide box formed by a front wall, an outer wall and the two side walls. In the vicinity of the top dead center, the end walls are then supported near their free ends by the side walls, so that their deformations can be maintained

within narrow limits.

  The invention will now be described in greater detail.

  tail as an example in no way limiting, with reference to the accompanying drawing in which: Figure 1 is a schematic section along the line I-I of Figure 2, an individual support equipping a diesel engine; Figure 2 is an observation in plan, along the line II-II of Figure 1, two adjacent engine supports, between which is interposed a butt; and FIG. 3 is a section along line III-III

of Figure 2.

  The known production support, resulting for example

  bonded by welding of steel sheets, has bottom plates 2 which form, conjugated

  inclined external walls 3 and fronts

  4 vertical tales, two trapezoidal frames observed in elevation. These frames are connected to each other by

  via a common cover plate 5.

  Between the outer walls 3 and front 4, the frames

  trapezoidal are filled by side walls 6.

  Tie rods 7, extending between these side walls (FIG. 2), precharge the cohesion of the support with a base plate 1 and with a liner.

  cylindrical (not shown) of the engine.

  A crankshaft 16 is mounted in the base plate 1 within a bearing shell 14 comprising upper and lower halves and capped by

a bearing cover 15.

  As can be seen in Figure 3, the length of

  engine m necessary for a cylinder includes, for the essential

  on both sides a half-length h / 2 of

  bearing (shell 14), the length S of a neck

  lower section 18 of the connecting rod 20, as well as

  two counterweights 17 of the crank arms.

  As mentioned, this engine length m needed

  for each cylinder must be as low as possible.

  In the central region between the end walls 4, the side walls 6 are replaced by a median partition 8 closed by a spacer 9 at its underside. As is evident from FIG. 2, the front walls 4 of two supports form, by their

  faces turned towards each other, sliding

  for the skids 10 of a shaft 11 of a stick which, in a well-known manner, is connected to the rod 12 of a

  piston and is housed in its housing 13.

  According to the invention, the side walls 6 are spaced from one another, in the lower part, by a small distance that is sufficient precisely to allow the passage of the tie rods 7. They are arranged obliquely and diverge mutually towards each other. the top so as to support the end walls 4, near the free ends of the latter, in the region of the top dead center of the piston stroke (this region corresponding substantially to the position of the stick in Figures 1 and 3) . The walls 3, 4 and 6 form

  in this region, a relatively large "box"

  ge and rigid without the need to increase the length m of the motor.

  In the space between the side walls

  6, the "box" comprising a side wall 6,

  an outer wall 3 and front walls 4 is reinforced

  by means of spacer partitions 19, so as to increase, in the area of high load, the rigidity of the side wall having a relatively large area.

  It goes without saying that many modifications can

  can be made to the medium described and represented,

  without departing from the scope of the invention.

Claims (1)

CLAIM   Support with supporting system for the slideways of piston engine pistons, said support comprising, between bottom and cover plates, inclined external walls and vertical end walls which are connected to each other by means of   lateral walls extending over the entire   said front walls furthermore having   on part of their height, on their anterior faces   a plurality of sliders through which the normal forces are transmitted to the support from the piston-butt shaft, characterized in that the side walls (6) supporting in pairs a front wall (4) extend obliquely from bottom to top in the direction   ends of this front wall.