FR2536827A1 - FLEXIBLE PIPE FOR A BRAKE SYSTEM, IN PARTICULAR FOR A MOTOR VEHICLE - Google Patents

Abstract

THE INVENTION RELATES TO A FLEXIBLE PIPE LINE FOR A BRAKE SYSTEM, IN PARTICULAR FOR A MOTOR VEHICLE. THIS CONDUCT INCLUDES A FLEXIBLE PIPE 2 TERMINATED BY A CONNECTION 3 AND A SLEEVE 12. THIS SLEEVE 12 IS MADE OF PLASTIC AND IS MADE OF TWO HALF-SHELLS ASSEMBLED BY WELDING. IT INCLUDES 13 PROJECTS ENGAGING IN DEPRESSIONS 10 OF THE CONNECTOR 3, STRENGTHENING RIBS 17 AND AN INTERNAL COLLAR 15 BEARING AGAINST PIPE 2.

Description

The present invention relates to a hose pipe

  for a brake system, in particular for a motor vehicle, comprising

  both a flexible hose with at least one connecting member to a

  end, and a sleeve attached to the peripheral surface of the cone.

  pick. In a hose pipe for known brake system (German patent application DE-OS 28 20 261), the sleeve is

  vulcanized on the pipe so as to be in one piece with that

  This method is extremely complicated and expensive.

  The object of the present invention is to provide a sleeve for a hose pipe for a brake system which will be simple and inexpensive to manufacture and which may be attached to the pipe by means of

  simple means, while at the same time ensuring excellent stability

  flexible hose and offering great resistance to

break.

  According to the invention, this object is achieved by the fact that the sleeve is made of plastics material and has at least one axially directed seal line-the contact surfaces of which are connected to one another by a connecting material or by a positive mechanical connection, after mounting this sleeve on the pipe Thus, before mounting on the hose pipe, the sleeve can be manufactured simply and economically in a separate injection molding tool The assembly that takes place next is achieved by simply placing the sleeve on the pipe then bonding or welding along its lines of seal The pipe of the pipe is thus, thanks to the sleeve,

  stabilized in the direction and made more resistant to breaks and ef-

  friction, so that we also obtain an increase in

longevity of driving.

  It is advantageous for the sleeve to be composed of two half

  shells Thus, the assembly of the sleeve on the pipe is even simpler So that the sleeve can not slide on the pipe, peripheral or axial depressions, distributed around the periphery,

  are advantageously arranged on the end of the connecting member

  located around the hose and corresponding projections,

  arranged on the sleeve, enter these depressions.

  So that the emanchon is particularly rigid in bending and economical in terms of material, weight and manufacturing cost, stiffening ribs diametrically opposed, extending along

  of the sleeve, are arranged on the periphery thereof.

  The bonding or welding surfaces are particularly large if the line of seam passes through the longitudinal axis of a stiffening rib. Thus, compressive or tensile forces

  particularly large can be transmitted to the joint.

  In order that the flexible hose is not unduly rigid in bending in the region of the sleeve, the inner diameter thereof

  substantially corresponds to the diameter of the portion of the

  rope around the hose, and on the circumferential surface

  interior of the sleeve, protruding reliefs

  against the peripheral surface of the flexible pipe Optimal elasticity of the flexible pipe at the point of transition to the connecting member is obtained if the reliefs are formed at the end of the sleeve The reliefs establish a particularly uniform grip

  sleeve on the hose if they are formed by an annular collar.

-

  The sleeve can in particular be easily deformed elastically.

  tically, while nevertheless giving the hose a rigidity

  sufficient if the sleeve consists of a tubular main body

  from its outer peripheral surface, several crowns

  centric separated by small intervals and interconnected by transverse partitions arranged, with offset, around the perimeter of the main body.

  The risk of rupture of the hose line is also

  if avoided if the sleeve is immobilized, in axial translation and in rotation, by pressing on the flexible pipe and if the sleeve passes at least partially through an opening of a sheet integral with a vehicle to which this sleeve is fixed Thus, driving - the flexible hose is guided in a well-defined way, which prevents vibrations from causing undesirable shocks against parts of the

  bodywork The two half-shells of the sleeve are pressed with

  strain on the hose, before being welded.

  An intermediate, perfect and reliable fixation of the flexible pipe is obtained if the sleeve has a portion which corresponds to the thickness of the sheet and whose diameter is less than or equal to the diameter of the opening of the sheet, and if means for immobilizing the sleeve (for example an abutment, a groove, an elastic plate) which protrude beyond the diameter of the opening are provided below

and above said portion.

  The different objects and characteristics of the invention

  will now be detailed in the description that follows, made

  by way of nonlimiting example, with reference to the accompanying figures which show Figure 1, a partial longitudinal sectional view of a hose pipe for braking system, considered in the region of a connecting member;

  FIG. 2, a section taken along the line I-I of FIG.

  1, perpendicular to the longitudinal axis of the pipe;

  Figure 3 is a partial view of another form of

  the use of a hose pipe considered in the region of a connecting member; Figure 4, a section taken along the line IIIIII of Figure 3, perpendicular to the longitudinal axis of the pipe; Figure -5 is a partial sectional view of another embodiment of a hose line in which the hose is held in place by a sleeve attached to the vehicle; and

  FIG. 6, a section taken along line V-V of FIG.

  5, perpendicular to the longitudinal axis of the pipe.

  FIGS. 1 and 2 of the drawing show a flexible hose line 1 which consists of a hose 2 and a connection member 3. 4 with a sealing surface 5 serves to receive a pressure connection piece,

  not shown in the drawing Approximately in the middle of the

  cordally, on its peripheral surface 6, a hexagonal portion 7 serves to retain this member during screwing of the pressure connecting piece The portion 8 of the connecting member 3 located around the flexible pipe 2 is substantially cylindrical depressions 10 equally distributed on the pourtour are arranged in the peripheral area

  9 of Part 8 They sink into the hose 2 that they re-

  thus bonding with pressure sealing, and establishing a positive mechanical connection, to the connection member 3 The peripheral surface

  11 of the sleeve 12 is applied to the peripheral surface.

  In the region of the depressions 10, the sleeve has correspondingly arranged protrusions 13, so that this sleeve 12 is

  secured to the pipe 1 comprising the flexible brake pipe.

  The connecting member 3, the hose 2 and the sleeve 12 are

  mutually concentric The fact that the inside diameter of the man-

  chon 12 corresponds substantially to the outer diameter of the portion 8 by which the connecting member 3 surrounds the flexible pipe 2 has the consequence that a free cylindrical space 14 is formed between the flexible pipe 2 and the sleeve 12 On the inner circumferential surface

  11 of the sleeve 12 and at its end, an annular collar 15 is directed

  towards the peripheral surface of the flexible pipe against which it

  Although it is also present in the case illustrated by the

  3, this annular collar 15 is not visible.

  According to Figures 1 and 2, stiffening ribs 17, along the sleeve 12 and diametrically opposed, are formed on the outer peripheral surface 16 of the sleeve A at the end of the sleeve

  12 located around the connecting member 3, an annular collar

  18 is formed, to which the stiffening ribs 17

  terminate by connecting to it. The outer diameter of the annular collar

  re 18 corresponds to the outer diameter of the stiffening ribs 17.

  According to FIG. 2, the sleeve 12 consists of two half-shells 19 and 20 which, at their contact surfaces 21 and 22, are connected to one another by a connecting material, by means of a cord of

  solder 23 which is formed for example by ultrasonic welding.

  In FIGS. 3 and 4, the sleeve 12 is constituted by the main tubular body 24, on the outer peripheral surface

  16 of which are formed several crowns parallel to each other and

  These rings 25 are interconnected by transverse partitions 26 arranged, with offset, on the periphery.

of the basic body 24.

  In FIGS. 5 and 6, the sleeve 12 is immobilized in axial translation and in rotation, by pressing, on the hose of the brake line, 1 of the diametrically opposite stiffening ribs 17, running along the sleeve 12, are located on the outer peripheral surface 16 of it Again, the sleeve

  12 is constituted by two half-shells 19 and 20 which, in their

  contact faces 21 and 22, are joined to each other by a connecting material by means of a weld bead 23 The sleeve 12 passes through an opening 27 of a sheet 28 integral with a vehicle against which this sleeve 14 is applied by an annular collar

  The portion 30 passing through the opening 27 has a slight diameter.

  slightly smaller than that of the opening 27 According to FIG. 5, a groove 31 is seen formed above the part 30 in which

  a flat spring 32 penetrates and bears against the plate 28.

  Thus, the flexible pipe 2 is connected, via the sleeve 12,

  to a sheet 28 of a vehicle not shown.

  It is obvious that the foregoing descriptions have been

  data as a non-limitative example and that many variants

  can be envisaged without departing from the scope of the invention.

Claims (10)

  1 Hose for brake system, no.   in particular for motor vehicles, comprising a hose with at least one connecting member at one end and a sleeve fixed on the peripheral surface of the pipe, characterized in that the sleeve (12) is made of plastic material and has at least one line of an axially directed seal forming a seal whose contact surfaces (21, 22) are joined to each other by a connecting material or by a positive mechanical connection, after assembly of   this sleeve (12) on the pipe (1).   Pipe according to claim 1, characterized in that   that the sleeve (12) is composed of two half-shells (19,20).   Driving according to any one of the preceding claims   characterized in that peripheral or axial depressions, distributed over the mouth, are arranged on the end of the connection member (3) situated around the flexible pipe (2), and in that corresponding projections (13) ) arranged on the   sleeve (12) penetrate these depressions.   4 Driving according to any one of the preceding claims   cedentes, characterized in that on the periphery (16) of the man-   chon, stiffening ribs (17) diametrically opposite   extend along this sleeve (12).   Driving according to any of the preceding claims   cedeentes, characterized in that the course of the seal line passes   by the longitudinal axis of a stiffening rib (17).   Driving according to any one of the preceding claims   cedeentes, characterized in that the inside diameter of the sleeve (12) corresponds substantially to the outside diameter of the portion (8) of the connecting member (3) located around the flexible pipe (2), and   in that on the inner peripheral surface (11) of the man-   chon (12), protruding reliefs (15) are applied against the sur-   peripheral face of the hose (2).   Driving according to claim 6, characterized in that   the reliefs (15) are arranged at the end of the sleeve (12).   8 Driving according to claim 7, characterized in that   that the reliefs (15) form an annular collar.   9 Driving according to any one of the preceding claims   cedeentes, characterized in that the sleeve (12) is constituted by a tubular base body (24) having, at its outer peripheral surface (16), several concentric rings (25) separated by small intervals, these rings being in further interconnected by transverse partitions arranged, with   shift, on the bottom of the basic body.   Driving according to any one of claims 1, 2   4 or 5, characterized in that the sleeve (12) is immobilized in axial translation and in rotation, by pressing, on the flexible pipe (2), and in that the sleeve passes through at least partially   an opening (27) of a metal plate (28) integral with a vehicle, which (28) this sleeve is attached.   11 Driving according to claim 7, characterized in that   that the sleeve 12 has a portion (30) which corresponds to the thickness   8 (28) and whose diameter is at most equal to that of   the opening (27) of the sheet (28), and in that it is provided,   below said portion (30), means (29,31,32) for immobilizing the sleeve (12) which protrude beyond the diameter of the opening (27).