FR3060067A1 - ASSEMBLY OF A FIRST HOLLOW PIECE AND A SECOND PART AND ASSOCIATED ASSEMBLY METHOD - Google Patents

Abstract

Assembling a first hollow part (6) and a second part (7), the first part (6) comprising a main portion (8) and at least one end (9) provided with two branches (10, 11) said end (9) comprising a cutout (12) configured to fit at least a portion of the outer surface of the second piece (7) for connecting the first and second pieces (6, 7). In addition, the branches (10, 11) of said end (9) each extend along an axis forming a non-zero angle with a longitudinal axis (13) of the hollow part (6).

Description

(57) Assembly of a first hollow part (6) and a second part (7), the first part (6) comprising a main portion (8) and at least one end (9) provided with two branches (10 , 11), said end (9) comprising a cutout (12) configured so as to match at least a part of the external surface of the second part (7) for the connection of the first and second parts (6, 7).

In addition, the branches (10, 11) of said end (9) each extend along an axis forming a non-zero angle with a longitudinal axis (13) of the hollow part (6).

i

Assembly of a first hollow part and a second part and associated assembly method

The present invention relates, in general, to a method of assembling two parts and, more specifically, to a method of assembling a hollow part and a second part.

In the automotive sector, it is common to have to assemble several parts of a vehicle such as a hollow body and a socket.

The hollow body corresponds, for example, to an axle arm which needs to be connected to a socket for the articulation of the arm on the body of the vehicle.

The hollow body may also correspond to a bi-shell cradle body intended to be connected to sockets for fixing it to the body, or even to connecting rods.

Commonly, a “wolf mouth” type cut is made on the hollow body. The cut, similar to a jaw, allows the hollow body to be finely docked on the socket by matching the cylindrical outer surface of the socket for the assembly and fixing of the two parts.

FIG. 1 shows an assembly of a first hollow part 1 and a second part 2 according to the state of the art. Generally, for reasons of endurance, the cutout 3 of the "wolf mouth" type must be provided with two ends 4 and 5 arranged on either side of the second part, here a socket 2, that is to say -dire arranged diametrically opposite with respect to the diameter of the sleeve.

The diameter of the sleeve is thus limited by the dimensions of the hollow body 1, and in particular by its width.

When the diameter of the sleeve is greater than the width of the hollow part to which the sleeve is to be connected, one solution is to increase the width of the hollow part, which has the consequence of increasing the mass of sheet metal and therefore d '' weigh down the room.

Another solution is to use forged insert ends, however, these ends are also heavy and expensive.

The object of the invention is therefore to remedy these drawbacks and to propose an inexpensive assembly method making it possible to assemble a first hollow part and a second large part, and in particular, of greater width than the first part. hollow, without committing additional material.

A hollow part is therefore proposed comprising a main portion and at least one end provided with two branches, said end comprising a cutout configured so as to match at least part of the external surface of a second part for the connection of said two parts. .

In addition, each branch of said end extends along an axis forming a non-zero angle with a longitudinal axis of the hollow part.

Preferably, the hollow part comprises two openings, at the junction of the end and the main portion, arranged on either side of the part so that the axis passing through the two openings is perpendicular to the axis longitudinal of the main portion.

Advantageously, the openings of the hollow part are of circular shape.

Alternatively, the openings of the hollow part can be of oblong shape.

The invention also relates to an assembly of a first hollow part and a second part, the first part comprising a main portion and at least one end provided with two branches, said end comprising a cutout configured so as to fit at least one part of the external surface of the second part for connecting the first and second parts.

In addition, the branches of said end each extend along an axis forming a non-zero angle with a longitudinal axis of the hollow part.

According to an embodiment of the invention, the second part is a socket.

The invention further relates to a method of assembling a first hollow part comprising a main portion and at least one end, with a second part, the method comprising a step of separating said end of the hollow part into two branches, a step in which the two branches are pushed back in opposite directions so that each branch extends along an axis forming a non-zero angle with a longitudinal axis of the hollow part, a step of making a cutout configured so to marry at least a portion of the outer surface of a second part for the connection of the first and second parts, and a step of fixing the first part on the second part.

Preferably, the separation of the end into two branches is preceded by a step of making two openings, at the junction of the end and the main portion, arranged on either side of the first hollow part of so that the axis passing through the two openings is perpendicular to the longitudinal axis of the main portion.

Advantageously, the openings are made by drilling.

According to an embodiment of the invention, the separation of the end into two branches is carried out by sawing.

In addition, the step of making a cut can be carried out before the step in which the two branches are pushed back in opposite directions.

Other objects, advantages and characteristics will emerge from the description which follows, given by way of purely illustrative example and made with reference to the appended drawings in which:

- Figure 1 is a side view of an assembly of a hollow part and a part according to the prior art;

- Figure 2 is a perspective view of a hollow part according to a first step of a method of assembling the first hollow part and the second part according to a first embodiment of the invention;

- Figure 3 is a perspective view of a hollow part according to a second step of a method of assembling the first hollow part and the second part according to a first embodiment of the invention;

- Figure 4 is a perspective view of a hollow part according to a third step of a method of assembling the first hollow part and the second part according to a first embodiment of the invention;

- Figure 5 is a perspective view of a hollow part according to a fourth step of a method of assembling the first hollow part and the second part according to a first embodiment of the invention;

- Figure 6 is a side view of the first hollow part and the second part connected according to an assembly method according to a first embodiment of the invention;

- Figure 7 is a perspective view of a hollow part according to a step of a method of assembling the first hollow part and the second part according to a second embodiment of the invention;

- Figure 8 is a perspective view of a hollow part according to a step of a method of assembling the first hollow part and the second part according to a third embodiment of the invention.

FIG. 6 illustrates an assembly of a first hollow part 6 and a second part 7.

In the example illustrated, the first hollow part 6 corresponds to an axle arm, cylindrical and hollow, and the second part 7 corresponds to an articulation socket of the axle arm on a body of a motor vehicle, a part also cylindrical and hollow.

The hollow part 6 comprises a main portion 8 and an end 9 provided with two branches 10 and 11.

The end 9 includes a cutout 12 configured to match part of the external surface of the part 7.

Each branch 10 and 11 extends along an axis forming a non-zero angle with the longitudinal axis 13 of the hollow part 6.

Preferably, at the junction of the end 9 and the main portion 8, two openings 14 and 15 are arranged on either side of the part so that the axis passing through the two openings 14 and 15 is perpendicular to the longitudinal axis 13 of the main portion 8.

Only one end of the part is illustrated. However, provision may be made for the hollow part 6 to comprise several ends connected to another part.

Figures 2 to 6 illustrate the different stages of a method of assembling a first hollow part such as the axle arm 6 and a second part such as the sleeve 7, according to a first embodiment of the 'invention.

The method comprises a first step of separating the end 9 in order to obtain the two branches 10 and 11.

In the illustrated embodiment, the step of separating the branches 10 and 11 is preceded by a first step in which the two openings 14 and 15 are made, illustrated in FIG. 2. This step is, in the illustrated case, obtained by drilling.

Advantageously, the separation into two branches 10 and 11 is then carried out by sawing the hollow part 6 from the openings 14 and 15 towards the end 9, step illustrated in FIG. 3.

As illustrated in FIG. 4, the two branches 10 and 11 obtained are then pushed back in opposite directions so that each branch 10 and 11 extends along an axis forming a non-zero angle with the longitudinal axis 13 of the hollow part 6. The angle is defined according to the dimensions of the second part 7, in this case, in the example illustrated, the diameter of the sleeve.

In the example illustrated, the openings 14 and 15 are circular. Alternatively, provision may be made for the openings 14 and 15 to be, for example, of oblong shape, as illustrated in FIG. 7. Preferably, a sufficiently regular curve will be chosen so that the step in which the branches 10 and 11 do not produce too great an elongation, remaining compatible with the material.

In a first embodiment of the invention, the step of separating the branches 10 and 11 is followed by a step of making the cutout 12.

We can provide, according to a second embodiment, illustrated in Figure 8, that the cutout 12 is made before the step in which the two branches 10 and 11 are pushed back in opposite directions.

According to yet another embodiment, provision may be made for 5 the openings 14 and 15 and the cutout 12 to be produced in a single operation.

Cutting 12 can be carried out by any suitable method such as plasma or laser cutting.

When the arms 10 and 11 are pushed back and the cutout 12 10 has been made, the first hollow part 6 and the second part 7 are connected and fixed to each other, as illustrated in FIG. 6.

The method according to the invention advantageously makes it possible to increase the diameter of the sleeve without increasing the mass of the assembly.

Of course, although the present description illustrates the connection of an axle arm and a bushing, provision may be made for the connection of a first hollow part and a second part in a field other than the automotive field. .

Claims (10)

1. Hollow part comprising a main portion (8) and at least one end (9) provided with two branches (10, 11), said end (9) comprising a cutout (12) configured so as to fit at least part of the outer surface of a second part (7) for the connection of said two parts (6, 7), characterized in that each branch (10, 11) of said end (9) extends along an axis forming an angle not zero with a longitudinal axis (13) of the hollow part (6). 2. Hollow part according to claim 1, characterized in that it comprises two openings (14, 15), at the junction of the end (9) and the main portion (8), arranged on either side of the part (6) so that the axis passing through the two openings (14, 15) is perpendicular to the longitudinal axis (13) of the main portion (8). 3. Hollow part according to claim 1 or 2, characterized in that the openings (14, 15) of the hollow part (6) are of circular shape. 4. Hollow part according to claim 1 or 2, characterized in that the openings (14, 15) of the hollow part (6) are of oblong shape. 5. Assembly of a first hollow part (6) and a second part (7), the first part (6) comprising a main portion (8) and at least one end (9) provided with two branches (10, 11), said end (9) comprising a cutout (12) configured so as to match at least a part of the external surface of the second part (7) for the connection of the first and second parts (6, 7), characterized in that the branches (10, 11) of said end (9) each extend along an axis forming a non-zero angle with a longitudinal axis (13) of the hollow part (6). 6. Assembly according to claim 5, characterized in that the second part (7) is a bush and the first part (6) is an axle arm. 7. Method for assembling a first hollow part comprising a main portion (8) and at least one end (9), with a second part (7), the method comprising: a step of separating said end of the hollow part (6) into two branches (10, 11); a step in which the two branches (10, 11) are pushed back in opposite directions so that each branch (10, 11) extends along an axis forming a non-zero angle with a longitudinal axis (13) of the hollow part (6); a step of producing a cutout (12) configured so as to match at least a part of the external surface of a second part (7) for the connection of the first and second parts (6, 7); and a step of fixing the first part (6) to the second part (7). 8. An assembly method according to claim 7, characterized in that the separation of the end (9) into two branches (10, 11) is preceded by a step of making two openings (14, 15), the junction of the end and the main portion (8), arranged on either side of the first hollow part (6) so that the axis passing through the two openings (14, 15) is perpendicular to the 'longitudinal axis (13) of the main portion (8). 9. The assembly method according to claim 7 or 8, characterized in that the openings (14, 15) are made by drilling and the separation of the end (9) into two branches (10, 11) is made by sawing . 10. An assembly method according to any one of claims 7 to 9, characterized in that the step of producing a cutout (12) is carried out before the step in which the two branches (10, 11) are pushed back in opposite directions. 1/4