FR2712364A1 - Integral support piece for a leaf spring, in particular for automobile suspension. - Google Patents

Abstract

A support part for a spring with several stacked leaves is made of an elastic material, rubber or plastic for example, open on two sides and threadable over the leaf spring. The support part comprises an upper part (2) and a lower part (10) interconnected by elastically deformable side parts (15, 16), so that the support part (1) can be slipped over the leaf spring (9). Connecting devices (5, 6) in the form of buttons, serving to establish a connection by interweaving of shapes between the support piece (1) and the spring (9), are formed inside the piece of. support, on its upper part (2) and / or its lower part (10). Applicable to automobile construction.

Description

The invention relates to a single piece of support for a spring

slides, composed of several

  stacked blades, in particular for motor vehicles

  For example, a piece made of an elastic material, such as rubber or plastic, is open on two sides and can be threaded onto the leaf spring.

  The support pieces placed between the

  The role of the stacking blades forming such a spring is to prevent the direct mutual contact of the blades in the outer zone of the stack and consequently the friction of metal on metal during oscillations (compressions and relaxations) of the spring. suspension for example. This friction of the blades causes not only

  unpleasant noise and affect the comfort of occupants.

  pants of the vehicle, it may also cause

  sion at the points of friction of the spring.

  One piece of support in one piece is known from document DE 1 067 315. This piece is made of a

  elastic material and has an annular cross-section

  lar. The connection with the leaf spring is made only under the action of a force, more especially under the effect of the own elastic stress of the part in the sense that, for mounting, the support piece is slightly extended then threaded onto the leaf spring, where it is allowed to relax at the desired location on

  the spring, so that it can contract again

  calf to be held in place on the spring under the

  own constraints present in the material.

  Before mounting, this support piece has an annular shape of uniform thickness. It is only in the assembly that it takes the form of the leaf spring under the effect of the own stress, so, usually, a rectangular shape, so that it is only in

  this situation, which can be distinguished from the

lower, lower and lateral.

  If the link must also include an imbricate

  cation of shapes, a leaf spring, prepared accordingly

  quence, is provided with relatively shallow transverse trough-shaped troughs, into which the supporting parts are snapped. On the other hand, on the

  support piece, no special devices are

  liers for establishing a link by nesting

of shapes with the leaf spring.

  The execution of the support part according to the

  from 1 067 315 has the disadvantage that to establish a

  binding by nesting shapes with the blades of the res-

  fate, it requires an additional operation, namely the realization of transverse hollows in the blades. If the connection is ensured purely under the action of a force, the disadvantage is that the support piece may not

  stay in the place where she was positioned during the

  on the blade and move during operation.

  so that the elasticity characteristics of

  the stacking of blades change and the same inconveniences

  appear only in the absence of such a room

support. -

  To avoid displacement on the blade,

  also assembles two-part

  held together by a screwed connection that connects them in

same time to the spring blade.

  The cost of mounting these two-part support parts assembled by screwing is very high since, to the two vulcanized rubber parts of the support piece, are added two steel threaded plates, as well as screws, and that all these elements must be manufactured, stored and assembled. The costs for a two-piece support piece are therefore very high. DE 12 08 55 55 discloses a spacer for separating blades from a spring stack. The spacer is essentially in the form of a plate. On a support side, a button has been formed which, when the spacer is placed between two blades of a spring, penetrates into complementary shapes in a hole.

pierced in a blade.

  This spacer has however the disadvantage that in a superposition of three blades, it is already necessary two

  spacers of this type to prevent the friction of

  tal on metal. Another disadvantage is that at least one

  the stacking blade must have an additional hole

  in which the spacer must be able to penetrate

  complementarity of forms by its button.

  The invention therefore aims to provide a piece of support in one piece, for a spring consisting of several stacked blades, which can be fixedly connected to such a leaf spring and be mounted economically.

  According to the invention, this result is achieved.

  result of the fact that the part comprises a higher part

  upper and a lower part interconnected by portions of edges or side portions elastically deformable, so that the workpiece can be threaded onto the leaf spring, and that connecting devices

  are formed inside the room on the upper part of the

  and / or the lower part, with a view to

  an interlocking connection between the

  support piece and the leaf spring.

  Thanks to the linking devices in the part

  upper and / or lower part of the

  then, a link by nesting forms with the res-

  blade fate can be obtained in a simple and

  without the need for the spring to be specially prepared

  is lying. In order to guarantee easy assembly despite

  the projecting connecting devices, the lateral parts

  are elastically deformable to the point that the support piece can be slid without any problem on the spring and that the connecting devices engage

  in complementary recesses provided for in the

  blade and can be made during the operation "cutting the end of the leaf spring". of the

  additional securing devices, such as

  screwed, tight or glued, can be

  removed and the support piece can therefore be

nomically.

  Other features and advantages of the

  will become clearer from the description

  which follows a non-limiting embodiment, and the accompanying drawing, in which: - Figure 1 is a top view of a support piece in one piece according to the invention; - Figure 2 is a section along the line II-II of Figure 1; and - Figure 3 is a section along the line

III-III of Figure 1.

  FIG. 1 represents a support piece 1 in one piece according to the invention, intended for a leaf spring in the form of a stack of three blades, the

  bearing piece being slid on the middle blade.

  An upper part 2 of the support part 1

  has two bulges 3, 4 in the form of bumps.

  Thanks to these bumps in the room, against which

  at least one blade of the stack, a softer compression and a more progressive appearance of the compression behavior of the suspension spring are obtained.

  since the resistance opposing compression increases

  mente with the growing section of the bulges 3, 4 in

  form of bumps. At least the upper part or the

  The lower part 10 of a support piece according to the invention has at least one bulge 3, 4 on its led side.

to a blade.

  The connecting devices, used to establish a connection by nesting shapes, are realized here in the form of two buttons 5, 6 located at a distance from each other in the direction of the length of the leaf spring 9 in the upper part 2 and the lower part 10 of the support piece. The location of these connecting devices in the form of buttons 5, 6 is clearly visible in the view from above. Because of the circular section of the buttons 5, 6, they can be caused to snap into holes already present in the leaf spring and through which passed until now screws for fixing parts of support in two parts. The piece of support in one piece according to the invention can thus be fixed simply on the spring. Due to the prediction of two buttons 5, 6, the support piece 1 can not rotate around its own vertical axis (axis parallel to the longitudinal axes of the buttons 5, 6) on the spring, which would be possible s' there was only one button. FIG. 2 shows a section taken along the line II-II of FIG. 1. It is clearly visible how the buttons 5, 6 penetrate holes 7, 8 of the leaf spring 9 and thus establish a connection through

nesting shapes.

  In order to prevent the penetration of moisture and foreign bodies into the interstices between the spring 9 and the support piece 1, so as to also prevent the

  rapid corrosion of the spring 9, beads of

  11, 12, 13 and 14 were planned on the sides

  end of the upper part 2 and the inner part

  10 of the support piece 1, beads that close the interstices between the spring 9 and the part 1 and extend for this purpose at least approximately over the entire

  width of the opening of the support piece. The dimensions

  Sealing beads 11, 12, 13 and 14 have

  have been chosen so that these beads apply firmly

  against the spring 9 and thus prevent penetration

  humidity, water splashes, for example, in

the support piece 1.

  FIG. 2 also shows the presence of bulges in the form of bumps on the lower part 10. As the embodiment described here of the piece of support in one piece is intended - as it was mentioned at the beginning - a spring in the form of a stack containing two secondary or supporting blades, this construction is necessary in case the piece

  according to the invention is mounted on the secondary blade

  from the top, so that the master blade and the lower secondary blade respectively apply against the bulge-shaped bulges on the upper part 2

and the lower part 10.

  If it is a stack with only

  two blades, namely a master blade and a blade se-

  conditional, it is sufficient, of course, to provide

  in the form of bumps on the only upper side of the support piece since, in this case, there is only one contact with another blade, the master blade, when the support piece 1 according to the invention is threaded on the

secondary blade.

  FIG. 3 is a section taken according to

line III-III of Figure 1.

  To connect the upper part 2 to the lower part 10, there are two lateral parts 15, 16 which, due to their much smaller thickness than

  that of the upper 2 and lower 10 parts,

  feel elastically deform and thus allow a

  simple mounting of the support piece 1 on the spring 9.

  The thickness of the upper 2 and lower 10 parts re-

  has a multiple of the thickness of the side portions, 16. It has been found advantageous to choose a ratio of about 4: 1 for the thickness of the upper 2 and lower 10 parts with respect to the thickness of the parts.

laterals 15, 16.

  Between the upper part 2, the lower part

  10 and the spring 9 can be inserted pieces of stiffening plate 17, 18 to prevent, especially if it is vehicles with high axle load, for example commercial vehicles or all-terrain vehicles, the displacement support pieces 1 transversely to the longitudinal direction of the leaf spring 9 or a lateral extrusion of the

  Part material because of the heavy load.

  The pieces of sheet 17, 18 do not extend over the entire length of the support piece 1 in one piece, but are a little shorter because of the presence of the sealing beads 11, 12, 13 and 14 (see figure

  2) on the end sides of part 1.

  By pulling on the upper part 2 and the

  lower part 10 when mounting the bearing part 1 on a leaf spring, the lateral parts 15, 16 are elastically deformed to the point that the piece 1 can be

  slid on the spring and that the buttons 5, 6

  in the concerned blade at the location defined by

the holes 7, 8.

Claims (9)

  1. One-piece support piece for one-piece   Blade machine, consisting of several stacked blades, in particular for motor vehicles, which is made of an elastic material, rubber or plastic, for example, is open on two sides and can be slipped onto the spring. blades, characterized in   it includes an upper part (2) and a part   (10) interconnected by parties   edges or side portions (15, 16) elastically   shaped, so that the support piece (1) can   threaded onto the leaf spring (9), and that   positive bonds (5, 6) are formed, within   part (1), on the upper part (2) and / or on the   lower part (10), in order to establish a connection by interweaving shapes between the support piece (1) and the leaf spring (9).   2. One-piece support piece according to the   claim 1, characterized in that the devices for   link (5, 6) are formed by buttons.   3. One-piece support piece according to the   claim 2, characterized in that two buttons (5, 6), spaced apart one behind the other in the longitudinal direction of the leaf spring (9), are formed in the upper part (2) and in the lower part (10).   4. One-piece support piece according to the   claim 1, 2 or 3, characterized in that the part   upper part (2) and the lower part (10) are rigid   each with a piece of sheet metal (17, 18) inserted.   5. One-piece support piece according to one of the   Claims 1 to 4, characterized in that at least   upper part (2) or the lower part (10)   feels at least one bulge (3, 4) on its led side to another leaf of the spring.   6. One-piece support piece in accordance with the   5, characterized in that the bulges (3, 4) have the shape of a bump.   7. One-piece support piece according to one of the   Claims 1 to 6, characterized in that the thick-   of the upper part (2) and the lower part of   (10) each represent a multiple of the thickness   side parts (15, 16).   8. One-piece support piece according to the   7, characterized in that the ratio of the thicknesses between the upper part (2) or the lower part (10) and the lateral parts (15, 16) is about 4: 1.   9. One-piece support piece according to one of the   preceding claims, characterized in that the   end sides of the upper part (2) and the   lower part (10) have beads of   (11, 12, 13, 14) applied against the spring to blades (9).