MXPA97000248A - Procedure for the cross coupling of one piece at least locally cylindrical in a tubular piece, a suitable tool to carry out that procedure, and a set of two pieces coupled in cross according to e - Google Patents

Abstract

It is the realization of a set (10) formed by two pieces coupled in cross, namely an at least locally cylindrical piece (II) and a tubular piece (12) and having transversely a hole (14) in which fits force the cylindrical piece (II). According to the invention, in order to contract internally with the wall (15) of the tubular part (12) that is on the side where the coupling of the cylindrical part (11) is made, it is inserted prior to said coupling, in the tubular piece (12), thanks to a hole (14), a transverse shim (20), which extends over a portion at least of the perimeter of that hole (14). Application, especially for the coupling of two piez

Description

PROCEDURE FOR THE CROSS COUPLING OF A PIECE AT LEAST LOCALLY CYLINDRICAL IN A TUBULAR PIECE, SUITABLE TO CARRY OUT THAT PROCEDURE, AND A SET OF TWO PIECES COUPLED IN CROSS ACCORDING TO THIS. » The present invention relates generally to the cross coupling of at least one locally cylindrical piece in a tubular piece, that is to say to the coupling of this cylindrical piece in the overall transverse tubular piece, with respect to the elongation direction thereof. By at least locally cylindrical piece, it is understood here, a piece whose outer surface is, at least locally, at the level of its coupling with the tubular piece, a cylindrical surface, that is to say a surface that, whatever the nature of the contour of its Cross section, circular or other, is formed by parallel generators. This piece, at least locally cylindrical, which, for reasons of convenience, will henceforth be referred to more simply as a cylindrical piece, can be solid, hollow or tubular. In the case of a hollow or tubular piece, this can serve as a housing for any other component. The assemblies formed by said cylindrical part cross-coupled to a tubular part find their main application in the assembly of parts, for example in the manufacture of automobiles. For its coupling, a hole capable of wrapping the outer contour of the cylindrical piece is practiced through the tubular piece, and for example, in the press, this cylindrical piece and this tubular piece is jointly subjected to a relative movement of the which results in that the cylindrical piece is press fit in the hole of the tubular part on one side thereof, while the tubular part contracts externally on the opposite side. Due to its tubular structure, the tubular piece globally forms two walls around its hole.

During the coupling of the cylindrical part, the wall located on the side of the insertion of the cylindrical part fits by the coupling force, and is demonstrated in practice, which can therefore suffer some deformation. As a result, at least locally, the cross section of the tubular part around its hole is altered, which can be detrimental to the quality of the normally secured mechanical connection, between the cylindrical part and this tubular part, and, In any case, the apparent deformation of the tubular piece gives a bad impression on the quality. Therefore, it is generally advisable to discard the set formed when the tubular piece presents that deformation. The present invention has in general terms an arrangement that advantageously allows avoiding this deformation. More precisely, it has, as a first object, a method for coupling a cylindrical piece in a tubular piece globally transversal with respect to it, this procedure being of the type presented below, in which a hole surrounds the outer contour of the cylindrical piece crossing the tubular piece from side to side, the cylindrical piece and the tubular piece are jointly subjected to a relative movement, from which it results that the cylindrical piece is press fit into the hole of the tubular piece on one side of this, while this tubular piece contracts externally from the opposite side to the previous one, and which is characterized because, prior to the fitting of the cylindrical piece in the hole of the tubular piece, it is inserted in the tubular piece, thanks to its hole, a cross fit suitable for contracting internally in the vicinity of that hole, on at least a portion of the perimeter of this, so that the fit transverse salt so located in the tubular piece, stay lodged in it.

For the insertion of this transverse shim, one could think of inserting it by one of the ends of the tubular piece. But, besides that this provision would require to intervene in the two ends of the tubular piece in a costly and complex way to be complete, its realization is impossible, for example, when it is a long-line piece, that is to say a piece long enough so that the hole in which the cylindrical piece must fit is too far from either end, so that it is possible to intervene level of that hole starting from any of those extremes. It is then provided, according to the invention, to insert the transverse shim in the tubular piece thanks to the hole in which the cylindrical piece must be fitted. In practice, it is provided for this purpose according to the invention, to first axially fit the transverse shim in the hole of the tubular piece, then to press radially between the two walls that the tubular piece forms in that hole. In any case, as a result of the presence of this transverse shim within the tubular piece before the cylindrical piece fits into its hole, the wall of this tubular piece located on the side of the cylindrical piece is advantageously contracting inwardly, and thus very effectively, prevents any deformation from occurring. The present invention also has objects, on the one hand, to a tool suitable for the location of said transverse shoe and on the other hand, to any assembly that, formed by two pieces coupled in cross, namely a cylindrical piece and a tubular piece having transversely a hole in which the cylindrical piece is forcefully fitted, include between the two walls that form around its hole the tubular piece, a transverse shroud that extends over at least a portion of the perimeter of that hole.

The objects of the invention, their features and advantages, will be seen more clearly in the description that follows, by way of example, referring to the schematic designs appended in which: Figure 1 is a perspective view of a set formed by two cross-coupled pieces according to the invention; Figure 2 is, on a larger scale, a partial view in longitudinal section of this assembly, according to the plane II-II of Figure 1; Figure 3 is, represented in its initial state, a perspective view of the transverse shoe manufactured according to the invention; Figure 4 is a plan view of this shim, according to arrow IV of Figure 3; Figures 5 and 6 are two views of this in axial section, according to, respectively, the planes V-V and VI-VI of Figure 4; Figures 7A, 7B, 7C and 7D are longitudinal sectional partial views, which, similar to that of Figure 2, illustrate, on another scale, different successive stages of the location of the transverse shoe according to the invention, between the two walls of the tire. the tubular piece into which it should be inserted; Figure 8 is a partial plan view of this tubular part thus equipped with this transverse shim, according to the arrow VIII of Figure 7D; Figure 9 is a partial longitudinal sectional view which, similar to those of Figures 7A, 7B, 7C and 7D, illustrates the snap fit of the cylindrical piece in the hole of the tubular part; Figure 10 is a plan view similar to that of Figure 4, for a variant embodiment of the transverse shoe according to the invention; Figure 11 is a plan view of another embodiment of this transverse shroud.

As it is illustrated in these figures, it is generally about the realization of a set 10, which, as seen better in Figure 1, is formed by two cross-coupled pieces, namely a cylindrical piece 1 1 and a tubular piece 12 As previously specified, the cylindrical part 11 is defined, in general, as a piece whose extensor surface 13 is at least iocally, at the level of its coupling with the tubular part 12, a cylindrical surface In the embodiment shown, the cross section of this outer surface 13 is supposed to be circular, and continuous. But it can perfectly well, have another contour, and / or with a greater or lesser notch. In the embodiment shown, the cylindrical piece 11 is presumed solid, like a bar. But it could perfectly well be a hollow piece, and for example tubular, like the tubular piece 12. Reason for which, in figures 2 and 9, its volume has been, by convention, crossed out. When the cylindrical part 11 is a tubular part of circular cross-section, it can in itself, for example, serve as a bushing on any axis or serve as a housing for said hub. In the illustrated embodiment, the tubular part 12 is, in this case, and by way of example, a long-line part In other words, it is, in this embodiment, a piece that, on the one hand, is elongated , according to an elongation direction D schematically dotted in FIGS. 1, 2 and 8, and that, on the other hand, is thin. Furthermore, its section and its thickness can be uniform or variable. In the represented embodiment, this piece tubular 12 is rectilinear, or substantially rectilinear But it is not obhgatopo that this is so On the contrapo, this tubular piece 12 can perfectly well be more or less curved or cambered This tubular piece 12 presents, in a global, transverse, and more precisely, transversely with respect to its direction of elongation D, by means of the intervention of the cylindrical piece 1 1, a hole 14, which wraps the external contour of the cylindrical piece 11, crosses it from side to side, and in which the p The cylindrical part 11 is snapped into place. In the illustrated embodiment, the hole 14 intervenes, by way of example, at a certain distance from both ends of the tubular part 12, but it is not obvious that this is so in the embodiment shown , the tubular part 12 forms, on the other hand, a profile whose transversal section, uniform in its entire length, is globally crushed in the form of an eyelet, substantially perpendicular to the generations of the cylindrical piece 11.

But it is not obligatory that this be so. By the contrapo, the cross section of this tubular piece 12 is indistinct, and / or can be adapted according to its length. It is sufficient, perpendicular to the generations of the piece 11, to present a width L sufficient to receive this cylindrical piece 1 1 Be that as it may, the tubular piece 12 forms, around its hole 14, two walls In the represented embodiment, and taking into account the foregoing, those two walls 15 are, at less in proximity to the hole 14, substantially flat, and parallel to each other But this is not obhgatopo so in the embodiment shown, the walls 15 are also substantially perpendicular to the generatpces of the cylindrical piece 1 1 But it is not mandatory that This is how it is known, for the coupling of the cylindrical piece 1 1 in the tubular piece 12, and as shown in figure 9, this cylindrical piece is jointly subjected to this p tubular piece 12, at a relative movement from which it results that the cylindrical piece 11 is forcedly engaged in the hole 14 of the tubular piece 12, on one side thereof, according to arrow Fl of figure 9, while this piece tubular 12 contracts externally from the opposite side to the previous one. In practice, for this purpose, the press is used. As shown in FIG. 9, the tubular part 12 then rests, for example, on the base 17 of this press, being duly attached to it, and having its hole 14 in it. the vertical of a space 18 provided in a complementary manner on this base 17, and together, the cylindrical part 1 1 is located on the piston not shown in this press. According to the invention, a transverse shim 20 is inserted into the tubular part 12 prior to the engagement of the cylindrical part 11 in the hole 14 thereof, which is capable of contracting it internally close to this hole 14 on at least one portion. of the perimeter thereof, and which, therefore, is adapted to the shape and / or section of the profile of this tubular piece 12 near its hole 14, such that the transverse fit thus located in the tubular piece 12 is keep then housed in this Preferentially, and as shown, a transverse shim is chosen for transverse shim 20 which, being susceptible to a radial expansion, for reasons to be explained later, is annularly formed by at least two segments 21 In the embodiment represented more precisely in FIGS. 1 to 9, only two segments 21 are provided, and since the transverse shim 20 is globally annular, they extend each one substantially following an angle In addition, in this embodiment, and as shown in FIGS. 3 to 6, these segments 21 are initially annularly joined to one another in a divisible manner. In practice, the transverse coupling 20 includes, for this, at the ends of a diameter, two areas of lower strength 22 since, at its inner edge, it is recessed in two grooves 23 running in all their length. Preferably, a transverse fit is chosen for transverse fit 20 whose outer edge 25, or , more precisely, that of each of its segments 21, have here an extema contour similar to that of the hole 14 of the tubular part 12. In the embodiment shown, the outer edge 25 of the transverse shroud 20 therefore has a circular outline, in the diameter of the hole 14 of the tubular piece 12 Even, transverse fit 20 is chosen a transverse shroud whose inner edge 26, or more precisely, that of each of its segments 21, has here a contom Extend similar to the hole 14 of the tubular piece 12 In the embodiment shown, the inner edge 26 of the transverse shoe 20 therefore also has a conto or circular, in the diameter of the hole 14 of the tubular piece 12 Finally, a transverse shim is preferably chosen as a transverse shroud 20 able to wedge between the two walls 15 that the tubular part 12 forms around its hole 14. For example, and as it has been represented, the transverse shroud 20, or, more precisely, each of its segments 21, presents, on its outer periphery, on at least one of its faces, and, in practice in each of them , a bevel chamfer 27. In the embodiment shown, this bevel chamfer 27 has here, a crescent-shaped contour, figures 3 and 4. Either way, from one to the other of the two sides of the transverse shoe 20, the snap chamfers 27 of the same segment 21 converge globally from the inside of the transverse shroud 20 towards the outside thereof. The thickness El, figure 5 and 7A, which presents the transverse shim 20 between its faces, without taking into account its snap chamfers 27, is substantially equal to the distance E2, figure 7 A, which internally separates at rest the two walls 15 that the tubular piece 12 forms around its hole 14, being slightly greater than this distance E2. In the represented embodiment, the transverse shroud 20, and, more precisely, each of the segments 21 thereof, has, also on its internal periphery, on at least one of its faces, and, in practice, on both , a chamfer 28. That chamfer 28 has, radially, a reduced extension, much lower than that of the snap chamfers 27. Between the two faces of the transverse shim 20, the chamfers 28 of the same segment 21 converge towards each other from the outside of this transverse shroud 20 towards the inside thereof.

In the represented embodiment, and for reasons to be explained later, the internal edge 26 of the transverse shoe 20, and, more precisely, that of each of its segments 21, has, in axial section, a concave profile. For example, and as shown, the axial section of that inner edge 26 is circular. The transverse shroud 20 provided according to the invention is, for example, made of a hard plastic that is resistant to compression. In the represented embodiments, it has a plane of symmetry perpendicular to its axis, that is to say perpendicular to the axis of the ring it forms. According to the invention, this transverse shim 20 is inserted into the tubular part 12 with the help of the hole 14 thereof. More precisely, for the insertion according to the invention, of the transverse shim 20 in the tubular piece 12, this transverse shim 20 is first fitted axially in the hole 14 of this tubular piece 12, according to the arrow F2 of FIG. 7A, and, according to the arrows opposite to one another F3 of figure 7C, then radially pressed between the two walls 15 the tubular piece 12 forms around that hole 14. For this insertion, for example a tool 30 of the type of the which is schematically represented in Figures 7A, 7B, 7C and 7D. This tool 30, which acts as an actuator, has, overall, a support 31, for example in the form of an open drawer downwards, at least two jaws 32, which are movably mounted radially on this support 31, between a close position for which, as shown on FIGS. 7A and 7B, are apt to receive together the transverse shim 20, by the internal edge 26 thereof and a remote position for which, as shown in FIG. 7C, they are suitable for inserting this transverse shim 20 into the tubular part 12, and control means 33, which are suitable for driving said jaws 32 In practice, the jaws 32 are applied permanently, elastically in the direction of their close position , by springs 34 that rest on the support 31, and have, at their inner edge, a conical or frustoconical surface 35, and the control means 33 are constituted by a cam, which has a surface ie conical or frusto-conical 36, and which is suitable for being inserted between them In the represented embodiment, in order to maintain the transverse fit 20 on the jaws 32, it is provided, between this transverse shim 20 and each of the jaws 32, Further fitting means In practice, these complementary fitting means result from the jaws 32 forming, on their outer edge, a projecting surface 37 of convex profile complementary to the concave profile of the internal edge 26 of the segments 21 of the transverse shoe. At first, the transverse shim 20 is simply forcibly encased, without rupture of its areas of least resistance 22, on the jaws 32, there in the approached position, as shown in Figure 7 A Carried by those jaws 32, the transverse shim 20 is then inserted into the hole 14 of the tubular piece 12, according to the arrow F2 of figure 7A, until reaching the inner volume of this tubular piece 12, at equal distance from the walls 15 that form around the hole 14, as shown in Figure 7B. As a result of the entry into action of its command means 33, the jaws 32 immediately move away from each other, as shown in FIG. FIG. 7C shows, which subject the transverse shim 20 to a radial expansion stress that leads the segments 21 constituting it, to separate from each other and to fit the force between the walls 15 of the tubular piece 12. transverse shroud 20 according to the invention, located thanks to the hole 14 of the tubular piece 12, is from that moment fragmented annularly in as many segments 21 as it has and therefore, in this case, in two segments 21. For the removal of the command means 33, it is then sufficient to ensure the return to the position close to the jaws 32, as shown in Figure 7D, then with releasing the support 31, to make room for the cylindrical piece 1 1, such how I know FIG. 9 is represented. Due to its thickness, and the chamfers 28 that it includes, the transverse shim 20, or, more precisely, the segments 21 that constitute it cause a slight distance from the walls when inserted into the tubular piece 12. 15 of this tubular piece 12. From this it results that, by relaxation, they are then subjected to an axial effort of adjustment of those walls 15, and, in practice, this axial adjustment effort is sufficient for their maintenance. Due to the circular contour of its outer edge 25, the transverse shim 20 fits well in the hole 14 of the tubular piece 12 having a maximum external diameter, and, due to the circular contour of its internal edge 26, the segments 21 to which it gives origin, conform well to the contour of that hole 14, extending as close as possible to this. Preferably, and as it emerges from Figure 8, it is envisaged that the transverse shim 20 intervenes following the elongation direction D of the tubular piece 12, at one of the ends at least, of the diameter of the hole 14 thereof, parallel to this direction of elongation D.

In practice, it is envisaged that, as represented in FIG. 8, the segments 21 of this transverse shim 20 each intervene respectively at both ends of that diameter. It emerges from Figure 8, that in the represented embodiment, the transverse shim 20 formed by the segments 21 extends over a portion of the perimeter of the hole 14 of the tubular piece 12 at least equal to two thirds of that perimeter. At the moment of fitting the cylindrical part 1 1 in the hole 14 of the tubular part 12, the segments 21 of the transverse shroud 20 advantageously contract, internally, supporting the wall 15 of the tubular piece 12 which is situated on the side of the cylindrical piece 11, in the wall 14 located on the opposite side, this being in turn making engagement, externally, by means of the base 17 of the press in question. The segments 21 of the transverse shoe 20 then constitute lost pieces, which remain within the assembly 10 thus formed. As is easy to understand, if, after their intervention, these segments 21 slightly bite on the hole 14 of the tubular piece 12, they are further away in this by the cylindrical piece 1 1 during the coupling of the latter, and the chamfer 28 that present on its inner edge 26 facilitates that pressure. As it is also easy to understand, due to its symmetry perpendicular to its axis, the transverse shim 20 is advantageously reversible and can thus be indistinctly used in one or the other direction. In the embodiments shown in FIGS. 10 and 11, the transverse shim 20 is formed by three segments 21 that are initially annularly connected to one another in a divisible manner in areas of lower resistance 22.

Furthermore, in the embodiment shown in FIG. 1 1, these segments 21 have their outer edge 25 cut by half-joints 38 which form a dihedron between them. For the rest, the provisions are the same as the previous ones. But, after its placement, the transverse shim has been more evenly distributed around the hole 14 of the tubular piece 12 By the way, the present invention is not limited to the embodiments described and represented, nor to the employment form also described and represented, but it certainly includes any variant of execution. In particular, the hole of the tubular part does not necessarily conform completely to the shape of the periphery of the cylindrical part. In other words, there is not necessarily a point of continuous contact between that hole and that periphery. It suffices that, by its outer contour, the hole of the tubular piece is able to develop the outer contour of the periphery, that is to say of the cross-section, of the cylindrical piece. On the other hand, instead of being initially of a single piece, the constituent segments of the transverse shroud according to the invention, can perfectly well form, from the first moment, different parts, being then surrounded, for example jointly, by an elastic clamp for your support Like the segments themselves, this elastic clamp then forms a lost piece.

Claims (19)

1. CLAIMS Procedure for the coupling by force of a piece at least locally cylindrical (11) in a tubular piece (12) globally transverse with respect to this, of the type according to which, a hole (14) surrounds an outer contour of the piece cylinder (11) passing through the tubular part (12) from side to side, the cylindrical part (11) and the tubular part (12) are jointly subjected to a relative movement which results in the cylindrical part (11) being fitted to the force in the hole (14) of the tubular piece (12) on one side thereof, while this tubular piece (12) contracts externally from the opposite side to the preceding one, characterized in that, prior to the fitting of the cylindrical piece (11) in the hole (14) of the tubular piece ( 12), is inserted into the tubular part (12), thanks to its hole (14), a transverse fit (20) suitable for contracting internally near that hole (14), in a portion at least of the perimeter of this, in such a way that the transversal fit (20) thus located in the tubular piece (12) remains lodged in it. Method according to claim 1, characterized in that, for the insertion of the transverse shim (20) in the tubular part (12), this transverse shim (20) is first axially fitted in the hole (14) of this tubular part (12), and it is then pushed radially between the two walls (15) that the tubular piece (12) forms around that hole (14). Method according to one of claims 1, 2, characterized in that the transverse shim (20) inserted in the tubular part (12) intervenes following the elongation direction (D) thereof. Method according to any of claims I to 3, characterized in that a transverse shim fit suitable for wedging between the two walls (15) that the tubular piece (12) forms around its hole (14) is chosen by transverse shim (20). . The method according to claim 4, characterized in that a transversal shim (20) is chosen as a transverse shim that has an engagement chamfer (27) on at least one of its faces 6 on its external pepfepa. Method according to one of claims 1 to 5 , characterized in that a transverse fit of hard synthetic matepal resistant to compression is chosen by transverse fit (20). The method according to any one of claims 1 to 6, characterized in that a transverse shim is selected by transverse shim (20) which, because it is capable of radial expansion, is formed annularly by at least two segments (21). 7, characterized in that a transverse shim is selected by transverse shim (20) whose segments (21) are initially annularly joined to one another in a divisible manner 9. Method according to any of claims 1 to 8, characterized in that it is chosen by transverse shims. (20) a transverse shroud whose outer edge (25) has, in plan, an extema contour similar to that of the hole (14) of the tubular piece (12) 10. Method according to any of claims 1 to 9, characterized in that a transverse shim is selected by transverse shim (20) whose internal edge (26) has, in plan, an outer contour similar to that of the hole (14) of the tubular piece (12). ) 11. Tool for the implementation of the method according to any of claims 1 to 10, characterized in that it is formed by a support (31), at least two jaws (32), which are mounted movable radially on the support (31), between a nearby position for which they are apt to jointly receive the transverse shim (20) by the internal edge (26) thereof, and a remote position for which they are apt to insert this transverse shim (20) in the tubular piece (12), and command means (33), which are suitable for driving said jaws (32) 12. Tool according to claim 11, characterized in that for the maintenance of the transverse shim (20) in the jaws (32), between this transverse shim (20) and each of those jaws (32), fitting means (37, 26) are provided. ) complementary. 13. Assembly formed by two cross-coupled pieces, namely an at least locally cylindrical piece (11) and a tubular piece (12) and having transversely a hole (14) in which the cylindrical piece (11) is forcedly fitted. , characterized in that it includes, between the two walls (15) that the tubular piece (12) forms around its hole (14), a transverse shim (20) that extends over a portion at least of the perimeter of that hole (14) . Assembly according to claim 13, characterized in that the transverse shim (20) inserted in the tubular part (12) intervenes at least in the direction of elongation (D) thereof. Assembly according to one of claims 13, 14, characterized in that the transverse shim (20) is between the two walls (15) that the tubular piece (12) forms around its hole (14). Assembly according to one of claims 13 to 15, characterized in that the transverse shim (20) has, at its outer periphery, a snap-in chamfer (27) on at least one of its faces. Assembly according to any one of claims 13 to 16, characterized in that the transverse shim (20) is made of a hard plastic that is resistant to compression. Assembly according to one of claims 13 to 17, characterized in that the transverse shim (20) is fragmented annularly in at least two segments (21). Assembly according to one of claims 13 to 18, characterized in that the outer edge (25) of the transverse shoe (20) has, in plan, an outer contour similar to that of the hole (14) of the tubular part (12). Assembly according to some of claims 13 to 19, characterized in that the internal edge (26) of the transverse shoe (20) has, in plan, a conto or exterior similar to the hole (14) of the tubular piece (12). Assembly according to one of claims 20, characterized in that the internal edge (26) of the transverse shoe (20) has, in axial section, a concave profile. EXTRACT This is the realization of a set (10) formed by two pieces coupled in cross, namely an at least locally cylindrical piece (11) and a tubular piece (12) and having transversely a hole (14) in which the cylindrical part (11) is forced into place. According to the invention, in order to contract internally with the wall (15) of the tubular piece (12) that is on the side where the coupling of the cylindrical piece (11) is made, it is inserted, prior to said coupling, into the tubular foot (12), thanks to its hole (14), a transverse shim (20), which extends over a portion at least of the perimeter of that hole (14). Application, especially for the coupling of two pieces.