FR2910086A1 - Sheath terminal for manual gearbox of motor vehicle, has sheath support body including detection unit detecting axial position with respect to support body for detecting locking of terminal on sheath stop plate - Google Patents

Abstract

The terminal (10) has a sheath support body (14) including support surfaces (30a, 32a) with a sheath stop plate (12). A slide (18) axially moves between an extended end position and a closed end position with respect to the support body and locks the support body on the stop plate. An elastic unit (20) axially stresses the slide in direction of the support surfaces. The support body includes a detection unit (22) detecting an axial position with respect to the support body for detecting the locking of the terminal on the plate.

Description

1 Sleeve end for selection and cable control of a box

  The present invention relates to the field of devices for the control of manual gearboxes for motor vehicles. More particularly, the invention relates to a sheath end for selection and control cable of a motor vehicle gearbox which is intended to be mounted on a sheath stop plate. A sheath stop plate is generally provided with a support intended to be mounted in abutment against a housing of the gearbox of the motor vehicle and comprising means for receiving sheath ends for the passage of a transmission cable. selection and control cable of the gearbox. These cables are connected at one end to the selector and control lever of the gearbox, generally called the gear lever, which is operated by the driver. A duct stop plate provided with duct ends makes it possible, in particular, to position the ducts of the selection and control cables relative to the casing of the gearbox, and to guide them during their sliding during the engagement of the gearbox. a report. To realize on the stop plate the mounting of the duct end, it is generally provided with a support body adapted to be mounted inside a U-shaped slot of the plate, d a slider movable axially relative to the support body to allow attachment of the tip on the sheath stop plate, and a resilient spring axially biasing the slide in the direction of the plate.

2910086 2 To secure the duct end to the duct stop, it has a lug located under the slot and extending in the circumferential direction. The outer surface of the lug cooperates with the bore of the slider. For further details, reference may be made, for example, to document DE 299 08 465. Such a fastener has the major disadvantage of not allowing to know the relative positioning of the slider and the spigot of the plate. It is therefore not possible to ensure that the bore of the slide covers the lug.

Thus, there is a relatively high risk of a faulty fastening of the duct end to the duct stop platen, which can cause these two elements to become disconnected, in particular when a gear ratio is engaged. speed. The shifting then becomes inoperative.

The present invention therefore aims to overcome this disadvantage. More particularly, the object of the invention is to provide a fastener adapted to obtain a fastening on a particularly safe and effective duct stop plate.

According to a first aspect, the subject of the invention is a duct end for selection and cable control of a motor vehicle gearbox intended to be mounted on a sheath stop plate, said end piece being provided with a sheath support body comprising at least one bearing surface with the sheath stop plate, a slider axially movable with respect to the support body between a far end position and an extreme close position relative to the bearing surface and adapted to allow a locking of said body on the sheath stop plate. The tip is also provided with a resilient member axially biasing the slide towards the bearing surface. According to one aspect of the invention, the support body further comprises a member for detecting the axial position of the slider relative to the support body to detect blockage of the sleeve tip on the sheath stop plate. . With such a tip, it becomes therefore possible to detect the relative positioning of the slider and the support body to ensure that the locking of the sleeve tip on the sleeve stop plate 10 is correctly made. When fitting the duct end to the duct stop plate, a check can be made, without specific tools, to ensure a good coupling between the slide and the plate. This greatly limits the risk of uncoupling over time in a particularly simple, efficient and economical manner. According to another characteristic of the invention, the detection member comprises an axial detection portion. The axial detection portion may be at least partly projecting axially from a front surface of the slider in the extreme close position. Thus, a visual detection is performed to ensure that the duct end is fixed to the duct stop platen. Preferably, the axial sensing portion is fully housed within a bore of the slider in the extreme remote position. In one embodiment, the slide comprises an angular indexing element capable of cooperating with a corresponding angular indexing element of the stop plate. The angular indexing element 2910086 4 may comprise a lug provided with a contact surface with a corresponding slot of the sheath stop plate. Such an lug limits the risk of separation of the sleeve end and the sheath stop plate, coming to be housed inside a slot in shape match. In one embodiment, the lug extends in the circumferential direction along an angular sector between 40 and 80. Advantageously, the slide comprises an angular indexing means 10 cooperating with a corresponding angular indexing means of the support body. In one embodiment, the support body comprises a plurality of tabs each provided at their free end with a radial hook for the axial retention of the detection member.

In one embodiment, the resilient member is axially mounted between the sensing member and the slider. According to a second aspect, the subject of the invention is an assembly of a sheath stop plate and a sheath end for selection and cable control of a motor vehicle gearbox 20 as defined above. The present invention will be better understood on reading the detailed description of an embodiment taken by way of non-limiting example and illustrated by the appended drawings, in which: FIGS. 1 and 2 are sectional views of FIG. a sleeve end according to the invention, mounted on a sheath stop plate, - Figure 3 is a sectional view along the axis III-III of Figures 1 and 2, - Figure 4 is a view of perspective of a slider of the sleeve end of Figures 1 and 2, and - Figures 5 to 7 illustrate the main steps of mounting the sleeve end on the sheath stop plate. FIGS. 1 to 3 show the general structure of a sheath endpiece according to the invention, designated by the general numerical reference numeral 10, which is intended to be coupled to a sheathing stop plate 12 in to allow support and guidance of selection and control cables of a gearbox (not shown). The sheath endpiece 10 essentially comprises a support body 14, with an axis 16, for mounting the endpiece on the plate 12, a slide 18 movable axially with respect to said body, and an elastic member 20 able to urge axially the slide 18 to obtain a fixing of the sleeve end to the plate 12. As will be described in more detail below, the body 14 of the sleeve end piece 10 comprises a detecting member 22 of the fastener said tip on the plate 12. To allow an angular indexing of the support body 14, of generally cylindrical shape, relative to the plate 12, it comprises two parallel flat faces 24, 26 extending radially to allow mounting by sliding said body inside a U-shaped groove 28 formed on the plate 12. The groove 28 is made from an upper edge of the plate 12. It is delimited by two parallel faces 28a and 28b forming surfaces guiding for the faces 24 and 26 of the body 14. The faces 28a and 28b are connected by means of a rounded portion 28c concave oriented upwards. They are delimited axially by radial front surfaces 12c and 12d of the plate 12.

The support body 14 also comprises a first radial collar 30 mounted to bear against the front surface 12c of the plate 12, and a second radial collar 32 arranged in the vicinity of said first collar to bear against the front surface 12d. of plate 12. Thus, each collar 30, 32 defines a bearing surface 30a, 32a with the plate 12 of sheath stop. The plate 12 is mounted axially between the bearing surfaces 30a and 32a, in contact with each other. The radial collars 30, 32 have a generally annular shape.

The support body 14 further comprises a third annular radial flange 34 of reduced diameter with respect to the second collar 32 and disposed axially at a distance from the latter, on the side opposite the first collar 30, so as to define a groove (Not referenced) inside which is intended to be mounted a protective bellows (not shown). The support body 14 further comprises an annular axial portion 36 extending from a front surface 30b of the first collar 30, axially on the side opposite to the bearing surface 30a. The axial portion 36 comprises a radial dimension smaller than that of the flange 30. Inside the bore of the axial portion 36 is fitted a filter member 38 in register with the support body 14 and provided with a bore 39 for the passage of a selection or control cable of the gearbox. The filter member 38 is in axial contact with the front surface 30b. It can for example be made of elastomer. The slider 18 has, meanwhile, a generally annular shape centered on the axis 16. It comprises an annular axial portion 40, a lug 42 for the angular indexing of the slider 18 on 2910086 7 the plate 12 for stopping the sheath and a guide portion 44 formed on the bore of the axial portion 40. The axial portion 40 radially surrounds the support body 14, and is defined axially by radial end faces 40a, 40b. The front surface 40a forms an abutment surface with the surface 12c of the plate 12, as will be described in more detail later. The guide portion 44 has a reduced axial dimension with respect to that of the axial portion 40. It extends radially inward towards the axial portion 36 of the support body 14. In order to allow axial displacement of the slider 18 relative to the support body 14 and to obtain indexing in rotation of these two elements, the guide portion 44 comprises on its bore a projection 46 (FIG. 4) made here in the form of parallelepipedic block which extends radially inwards. The projection 46 is housed inside a groove (not shown) formed on the outer surface of the axial portion 36 of the support body 14. The projection 46 of the slider 18 forms an angular indexing means 20 cooperating with the groove forming corresponding angular indexing means of the support body 14. As indicated above, the projection 46 further allows axial guidance in translation of the slide 18 relative to the support body 14. With regard to the lug 42, it extends axially from the front surface 40a. I1 is intended to cooperate with a slot 50 in shape matched on the support plate 12 in the vicinity of the groove 28, and located radially below it. The lug 42 extends in the circumferential direction in an angular sector advantageously between 40 and 80. The angular dimension of the lug 42 is here substantially equal to 70. Thus, a good retention of the coupling of the slider 18, and more generally of the sleeve end 10, is obtained on the sheath stop plate 12. The risks of uncoupling the tip 10 and the plate 12 are limited. The detection member 22, of generally annular shape, comprises an annular radial portion 52 mounted radially in abutment with the bore of the axial portion 40 of the slide. 18 and 10 axially against a radial surface of the filter member 37. The radial portion 52 is fitted on a short guide portion 38a of the filter member 38. The radial portion 52 is situated axially on the side opposite to the first flange 30, considering the guide portion 44 of the slider 18. The portion radial 52 is extended at an edge of large diameter by an axial portion 54 extending outwardly. In order to allow axial solidarity of the support body 14 and the detection member 22, the radial portion 52 comprises a plurality of recesses 56 passing axially through said portion and spaced uniformly in the circumferential direction. . They allow the passage of tongues 37 of the support body 14 which axially extends the axial portion 36. Of course, the axial tongues 37 are also spaced relative to each other in the circumferential direction.

In order to ensure axial retention of the sensing member 22 relative to the support body 14, each of the tongues 37 is provided at its free end with a hook (not referenced) extending radially outwardly. The hooks bear against a front surface 52a of the radial portion 52. The hooks thus constitute axial retention elements of the detection member 22. In the embodiment illustrated in the figures, the support body 14 and the sensing member 22 are two distinct elements.

However, it is readily conceivable that it is also possible, in an alternative embodiment, to make these two elements in one piece. The axial portion 54 extends axially outwardly from the radial front surface 52a of the radial portion 52. The axial portion 54 extends axially on the opposite side to the guide portion 44 of the slider 18. A surface 52b radial front of the radial portion 52 of the detection member 22, which is in contact with the filter member 38, delimited with the slide 18, and more precisely with the guide portion 44 and the axial portion 40, as well as with the tongues 37 of the support body 14, an annular radial space inside which the elastic member 20 is housed. Thus, the elastic member 20 is located axially between the guide portion 44 of the slide 18 and the front surface 52b of the sensing member 22, and radially between the tongues 37 and the bore of the axial portion 40 of the slider 18. The resilient member 20 is made here in the form of a spring axially mounted support against the surface fr ontale 52b of the detection member 22 and the guide portion 44 of the slider 18.

The sensing member 22 being axially integral with the support body 14 mounted on the plate 12, the resilient member 20 tends to axially bias the slide 18 toward the bearing surfaces 30a, 32a of the support body 14, and more generally in the direction of 2910086 10 the plate 12 so as to allow the fixing of the slide 18 thereon, via the lug 42. To achieve the assembly of the sleeve cap 10 on the plate 12 sheath stopping, the procedure is as follows.

In a first step, the slide 18 is retracted so as to compress the elastic member 20 and then the support body 14 is slidably mounted inside the groove 28 (FIGS. 5 and 6) until it comes into contact against the rounded portion 28c of the groove 28. At this point, the lug 42 of the slider 18 is aligned radially with the slot 50, said slider being released. The elastic member 20 then exerts an axial force directed towards the bearing surfaces 30a and 32a of the flanges 30 and 32, and more generally towards the plate 12 for stopping the sheath. This axial force causes the axial displacement of the slider 18 towards the plate 12 until the abutment surface 40a of the axial portion 40 of said slide bears against the surface 12c of the plate (Figure 7). In this position, the lug 42 is housed inside the slot 50, which makes it possible to obtain the angular indexing of the slider 18 with respect to said plate, and consequently the blocking or locking of the bit In fact, the lug 42 limits the risk of radial displacement of the body 14 inside the slot 28. The lug 42 thus constitutes an angular indexing element of the slide 18 on the platen 12, and an attachment member of the tip 10 thereon. Under the effect of the elastic member 20, the slider 18 thus moves relative to the bearing surfaces 30a and 32a, and more generally with respect to the plate 12, of a remote extreme position in which the axial portion 54 of the detection member 22 2910086 11 is entirely housed inside the bore of the slider 18, towards an extreme close position in which the surface 40a abuts against the surface 12c and in which the axial portion 54 is projecting axial to the end face 40b of the end of the slider 18 axially opposed to the abutment surface 40a. The front surface 40b forms a rear surface of the slider 18, the surface 40a a front surface. Thus, the axial displacement of the slider 18 from the far end position to the extreme close position in which the sleeve end piece 10 is locked on the plate 12, via the spigot 42, is such that the axial portion 54 of the detection member 22 becomes visible from the outside of the nozzle 10. This axial portion 54 thus forms a detection portion to ensure that the tip 10 is properly blocked on the plate 15 12. Indeed to ensure that the lug 42 of the slider 18 is housed inside the slot 50, it is sufficient to check that the axial portion 54 of detection is visible from outside the tip. Advantageously, the detection member 22 is made of rigid synthetic material, such as polypropylene (PP). It can thus be easily obtained in a bright color, such as green, which is easily identifiable. Furthermore, the arrangement of the axial portion 54 axially on the opposite side to the flanges 30 and 32 of the support body 14, considering the portion 44 of the slider 18, makes it possible to obtain a visual detection regardless of the type of design. the plate 12 of sheath stop. Thanks to the invention, it is thus possible to verify visually that the duct end piece is correctly fixed on the duct stop plate, 2910086 12 during the assembly operation or during a subsequent verification, so as to limit the risk of dissociation between these two elements. Furthermore, the existence of a slider provided with a lug provided to be housed inside a slot of the sheath stop plate 5 makes it possible to obtain a locking of the sheath end on platinum particularly effectively. Under these conditions, the movements of the slide in rotation and in translation relative to the cleat stop plate are limited. In addition, in the case of a possible angular tilting of the slider relative to the axis of the support body, mounting the lug inside the slot makes it possible to retain the locking of the slider, and more generally of the mouthpiece, on the turntable.

Claims (10)

  1-Sleeve end for selection and cable control of a motor vehicle gearbox intended to be mounted on a sheath stop plate, said nozzle being provided with a body (14) for supporting the sheath comprising at least one bearing surface (30a, 32a) with the sheath stop plate, a slider (18) movable axially with respect to the support body between a remote extreme position and an extreme position close to the surface support and capable of allowing a locking of said support body on the sheath stop plate, and of a resilient member (20) axially biasing the slide towards the bearing surface, characterized in that the body support member further comprises a sensing member (22) for axial position of the slider relative to the support body for detecting blockage of the sleeve tip on the sheath stopper.   2-sleeve end piece according to claim 1, wherein the detection member (22) comprises an axial portion (54) of detection.   3-sleeve end piece according to claim 2, wherein the axial portion (54) of detection is at least partly in axial projection with respect to a front surface (40b) of the slider in the extreme close position.   4-sleeve end according to claim 2 or 3, wherein the axial portion (54) of detection is fully housed within a bore of the slider in the extreme remote position.   5-sheath end according to any one of the preceding claims, wherein the slide (18) comprises an angular indexing element 2910086 14 adapted to cooperate with a corresponding angular indexing element of the sheath stop plate.   6. The sheath end of claim 5, wherein the angular indexing member comprises a lug (42) having a contact surface with a corresponding slot of the sheath stop platen.   7-sleeve end piece according to claim 6, wherein the lug (42) extends in the circumferential direction according to an angular sector between 40 and 80. 10   8-sleeve end piece according to any one of the preceding claims, wherein the body (14) support comprises a plurality of tongues (37) each provided at their free end with a radial hook for the axial retention of the organ detection device (22). 15   9-sleeve end according to any one of the preceding claims, wherein the resilient member (20) is mounted axially between the sensing member (22) and the slider (18).   10-Assembly of a duct stop plate (12) and a sleeve end (10) for selection and cable control of a motor vehicle gearbox 20 according to any one of the preceding claims.