Parking lock module

Abstract

The invention relates to a parking lock module (1) for a vehicle, configured to cooperate with a toothed wheel which is, in particular, connected to a shaft of a gearbox, the parking lock module (1) comprising: - a pawl (6) that is able to move between a closed position and an open position, and that comprises a finger (7) configured to engage in a recess (8) of the toothed wheel (2) when in the closed position, in order to prevent the toothed wheel from rotating, this pawl (6) being disengaged from the toothed wheel when in the open position, - an actuating mechanism (9) for moving the pawl (6) from its open position to its closed position, - a structural support (19) being configured to carry the actuating mechanism (9) and the pawl (6), the structural support (19) comprising a rear abutment wall (28), in particular formed from a folded tab (29), this rear abutment wall (28) being configured to limit the movement of the rod (12) and the bracket (16) when they move back beyond the retracted position.

Description

[0001] DESCRIPTION

[0002] Title: Parking Lock Module

[0003] [1] The present invention relates to a parking lock module for a vehicle, in particular intended to be integrated into a gearbox or a reduction gear of a vehicle.

[0004] [2] Currently, parking lock systems require that the various components, such as the ratchet, rod, spring and support structure, be individually assembled inside the gearbox. This assembly method involves many steps.

[0005] [3] A parking locking mechanism comprising a housing receiving a pivotally mounted locking lever that engages a parking wheel via an operating element is also known from patent application FR3076591. The housing comprises side walls formed from stamped / bent parts, and guide profiles in the form of elongated recesses open on the front side so as to allow the insertion of an operating element by way of guidance.

[0006] [4] The invention aims in particular to improve parking locking systems.

[0007] [5] The invention relates to a parking lock module for a vehicle, configured to cooperate with a toothed wheel, in particular connected to a shaft of a gearbox, the parking lock module comprising:

[0008] - a movable pawl between a closed position and an open position, and comprising a finger configured to engage, in the closed position, in a recess of the toothed wheel, in order to block the rotation of said toothed wheel, this pawl being disengaged from the toothed wheel in the open position,

[0009] - an actuation mechanism for moving the pawl from its open position to its closed position, this actuation mechanism comprising: o a movable rod between a retracted position in which the rod is withdrawn from the pawl and an advanced position in which the rod is advanced towards the pawl to bring the pawl into its closed position, o one or more cam followers, in particular one or more rollers or one or more cones, carried by a mount at one end of the rod, this mount having, for example, a U-shape, the cam follower(s) being configured to bear against the pawl, in particular against a cam of this pawl, to move the pawl towards its closed position, o a first spring configured to bring the rod from its retracted position to its advanced position,

[0010] - a structural support being configured to carry the actuation mechanism and the ratchet, and the structural support includes a rear stop wall, notably formed from a bent tongue, this rear stop wall being configured to limit the movement of the rod and the mount when they recoil beyond the retraction position.

[0011] [6] The features described below are optional and can be combined with each other as appropriate.

[0012] [7] The rear stop wall is formed from a folded tongue and this tongue is formed directly from a sheet forming the structural support.

[0013] [8] The rear stop wall is configured to serve as a stop for the mount.

[0014] [9] In the event of excessive recoil of the stem, the mount comes into contact with the rear stop wall, thus limiting this movement.

[0015]

[0010] The invention thus offers the advantage of protecting the actuation mechanism against excessive movement in a "ratcheting" situation where the pawl cannot immediately engage in a groove of the gear due to the alignment of the teeth. This results in a temporary back-and-forth movement of the mechanism without the locking being fully achieved.

[0016]

[0011] The rear stop wall has a window configured to allow the rod and associated spring to pass through.

[0017]

[0012] The rear stop wall can be formed from a tongue extending an upper transverse wall of the structural support.

[0018]

[0013] The upper transverse wall of the structural support defines a bearing surface, which is notably planar, of the cam follower(s) carried by the mount at one end of the rod.

[0019]

[0014] The rear stop wall is opposite one or more additional tabs formed in particular on the sides of the structural support. This or these additional tabs are advantageously configured to serve as a retainer for the rear stop wall.

[0020]

[0015] These additional tabs are configured to be in contact with the rear abutment wall, for example by being welded together. Alternatively, this or these additional tabs are configured to be at a distance from the rear abutment wall, and to bear against this or these additional tabs only in the event of deformation under stress.

[0021]

[0016] This makes it possible to reinforce the rear stop wall.

[0022]

[0017] The invention also relates, independently or in combination with the foregoing, to a parking lock module for a vehicle, configured to cooperate with a toothed wheel, in particular connected to a shaft of a gearbox or reduction gear, the parking lock module comprising:

[0023] - a movable pawl between a closed position and an open position, and comprising a finger configured to engage, in the closed position, in a recess of the toothed wheel, in order to block the rotation of said toothed wheel, this pawl being disengaged from the toothed wheel in the open position,

[0024] - an actuation mechanism for moving the pawl from its open position to its closed position, this actuation mechanism comprising: o an eccentric having a rotating shaft, o a rod movable by the eccentric, between a retracted position in which the rod is retracted from the pawl and an advanced position in which the rod is advanced towards the pawl to bring the pawl into its closed position, o one or more cam followers, in particular one or more rollers or one or more cones, carried by a mount at one end of the rod, this mount having, for example, a U-shape, the cam follower(s) being configured to bear against the pawl, in particular against a cam of this pawl, to move the pawl towards its closed position, o a first spring configured to bring the rod from its retracted position to its advanced position,

[0025] - a structural support being configured to carry the actuation mechanism and the ratchet, and comprising a wall having a slot open on one edge of the wall to allow the insertion of the eccentric rotation shaft towards a bottom of the slot from said edge of the wall, the structural support being made of a single piece, in particular of cut and folded sheet metal.

[0026]

[0018] The invention allows the module to be assembled as a pre-assembled sub-assembly, for example, in a gearbox housing. This significantly reduces assembly time and the number of operations required. The module can thus be mounted in a single step in the housing, simplifying the manufacturing process.

[0019] The slot comprises a first section open on said edge of the wall, extended by a second positioning section to hold the eccentric shaft in its operating position.

[0027]

[0020] The first section and the second section are inclined relative to each other.

[0028]

[0021] The eccentric shaft comes to rest at the bottom of the second section of the slot, at the end of insertion.

[0029]

[0022] This configuration has the advantage of allowing quick and easy insertion of the eccentric shaft onto the structural support.

[0030]

[0023] In addition, the invention allows the eccentric to be easily disassembled, if necessary, thanks to the open slot.

[0031]

[0024] The structural support comprises two opposing sides, each joined to a double U-shaped wall, and the ratchet is held between these double U-shaped walls.

[0032]

[0025] This advantageously allows the ratchet to be centered within the structural support.

[0033]

[0026] The structural support includes a rear stop wall, in particular formed from a folded tongue, this rear stop wall being configured to limit the movement of the rod and the mount when they move back beyond the retraction position.

[0034]

[0027] This tongue is formed directly from a sheet metal forming the structural support.

[0035]

[0028] The rear stop wall is configured to serve as a stop for the mount.

[0036]

[0029] In the event of excessive recoil of the stem, the mount comes into contact with the rear stop wall, thus limiting this movement.

[0037]

[0030] The invention thus offers the advantage of protecting the actuation mechanism against excessive movement in a "ratcheting" situation where the pawl cannot immediately engage in a groove of the gear due to the alignment of the teeth. This results in a temporary back-and-forth movement of the mechanism without the locking being fully achieved.

[0038]

[0031] The rear stop wall has a window configured to allow the rod and associated spring to pass through.

[0039]

[0032] The rear stop wall can be formed from a tongue extending an upper transverse wall of the structural support.

[0040]

[0033] An upper transverse wall of the structural support defines a bearing surface, which is notably flat, of the cam follower(s) carried by the mount at one end of the rod.

[0041]

[0034] The structural support comprises flanks extending orthogonally to the upper transverse wall, and this upper transverse wall is located between these flanks.

[0035] Each flank occupies one entire side of the structural support.

[0042]

[0036] The rear stop wall is opposite one or more additional tabs formed in particular on the sides of the structural support. This or these additional tabs are advantageously configured to serve as a retainer for the rear stop wall.

[0043]

[0037] These additional tabs are configured to be in contact with the rear abutment wall, for example by being welded together. Alternatively, this or these additional tabs are configured to be at a distance from the rear abutment wall, and to bear against this or these additional tabs only in the event of deformation under stress.

[0044]

[0038] This makes it possible to reinforce the rear stop wall.

[0045]

[0039] The structural support is provided with one or more fixing holes allowing the module to be mounted on a gearbox or reducer housing, in particular using screws.

[0046]

[0040] The structural support can be subjected to heat treatment after the cutting and bending operations.

[0047]

[0041] This heat treatment makes it possible to strengthen the mechanical resistance of the part.

[0048]

[0042] According to one aspect of the invention, the first spring is configured to push the rod towards the advanced position.

[0049]

[0043] When the first spring is compressed, this first spring exerts a force which moves the rod towards the pawl, thus enabling the pawl to engage in a hollow of the toothed wheel and to be held in this closed position.

[0050]

[0044] The first spring is positioned coaxially around the rod. The spring is a helical spring.

[0051]

[0045] One of the free ends of the first spring rests on a sleeve in which the rod can slide, while the other end of the first spring rests on the mount.

[0052]

[0046] When the pawl cannot immediately engage in a groove of the gear, the rod remains in the retracted position. In this case, the first spring is compressed, which allows energy to be stored. Once the pawl can engage in a groove, the spring releases this energy to move the rod to the advanced position.

[0053]

[0047] According to another aspect of the invention, the ratchet is associated with a second spring which is configured to return the ratchet to its open position.

[0054]

[0048] In the open position, this spring exerts a force that lifts and moves the pawl away from the toothed wheel, allowing the latter to rotate freely.

[0049] The second spring is located below the pawl, with one end bearing directly on it.

[0055]

[0050] When the rod is in the advanced position, the cam followers hold the pawl in the hollow of the toothed wheel against the action of the second spring.

[0056]

[0051] This second spring ensures a return of the ratchet to its open position.

[0057]

[0052] Thus, the first spring acts mainly on the rod to move the cam followers and push the pawl towards its closed position, while the second spring acts directly on the pawl to return it to the open position, once the rod is in the retracted position.

[0058]

[0053] According to one aspect of the invention, the actuation mechanism includes a sleeve in which the rod can slide between the retracted position and the advanced position.

[0059]

[0054] The sheath allows the rod to be guided in a substantially linear manner.

[0060]

[0055] The sheath has an external shape that is substantially cobblestone or cylindrical.

[0061]

[0056] The sheath has a bearing configured to be mounted with a pin eccentric to the eccentric.

[0062]

[0057] The eccentric allows the rotary movement of the eccentric pin to be converted into a back-and-forth movement of the rod, guided by the sleeve.

[0063]

[0058] An elastic ring is fixed to one end of the eccentric pin to link this eccentric pin with the sleeve, in the direction of the axis of rotation of the eccentric.

[0064]

[0059] The elastic ring is configured to come into contact with one face of the sheath.

[0065]

[0060] Alternatively, the structural support includes a portion of wall against which the sleeve rests to block the sleeve laterally.

[0066]

[0061] This portion of the wall of the structural support replaces the circlip.

[0067]

[0062] A stop is present on the rear end of the rod to come into contact with the sleeve, so that when the sleeve recoils, this sleeve can recoil the rod towards the retraction position.

[0068]

[0063] The stop is formed by a collar on the rear end of the rod.

[0069]

[0064] Alternatively, a screw is mounted on the rear end of the rod and serves as a stop suitable for cooperating with the sheath.

[0070]

[0065] This screw is screwed into a threaded hole in the rod.

[0071]

[0066] This configuration allows for a removable solution. The screw can thus be removed to facilitate maintenance / repair, in particular the replacement of the sleeve, the rod itself, or the first spring.

[0067] The cam follower(s) are configured to bear against the pawl, specifically against a cam formed on it, in order to move the pawl to its closed position.

[0072]

[0068] The mount carries two cam followers, of which a first roller is configured to bear on an upper bearing surface of the structural support, and a second roller acts on a cam formed on the ratchet.

[0073]

[0069] The cam followers are carried by a U-shaped mount fixed to the end of the rod.

[0074]

[0070] Each roller is mounted on a rotation axis connecting the parallel arms of the U.

[0075]

[0071] When they reach the closed position, the cam followers exert pressure on the pawl cam, keeping it engaged in the groove of the toothed wheel.

[0076]

[0072] The eccentric is provided with one or more flanges bearing against a wall of the structural support.

[0077]

[0073] This makes it possible to keep the eccentric in the structural support, preventing the eccentric from moving laterally while ensuring its rotation around its axis.

[0078]

[0074] The flanges comprise a small flange and a large flange positioned on either side of the thickness of a wall of the structural support.

[0079]

[0075] The flanges have dimensions, in particular diameters, greater than the distance between two opposite edges along the slot for the insertion of the eccentric.

[0080]

[0076] These flanges allow the eccentric to be held in place without the need for circlips or other additional fixing devices.

[0081]

[0077] The invention further relates to an assembly comprising a parking lock module as above, and a gearbox or a reducer, the parking lock module being configured to cooperate with a toothed wheel connected to a shaft of the gearbox or reducer.

[0082]

[0078] The assembly includes an actuator configured to drive the eccentric in rotation around its axis of rotation.

[0083]

[0079] This rotation makes it possible to convert a rotary motion into a substantially linear motion of the rod.

[0084]

[0080] The actuator may include an electric motor. This motor is coupled to the eccentric shaft via complementary shapes, such as flats or splines.

[0085]

[0081] The actuator is located outside the gearbox or reducer housing.

[0082] The eccentric shaft passes through the housing via an opening fitted with a sealing gasket.

[0086]

[0083] The invention also relates to a method for mounting a parking lock module in a gearbox or reduction gear, comprising the following steps:

[0087] - provide a pre-assembled parking lock module,

[0088] - mount this parking lock module in the gearbox or reduction gear.

[0089]

[0084] Other features, details and advantages of the invention will become clearer upon reading the following description on the one hand, and the illustrative and non-limiting examples of embodiments given with reference to the attached schematic drawing on the other hand, in which:

[0090]

[0085] Figure 1 is a schematic representation of a parking lock module according to an example of an implementation of the invention;

[0091]

[0086] Figure 2 is a schematic representation of the parking lock module of Figure 1, with the structural support shown in transparency to see the elements housed in this structural support;

[0092]

[0087] Figure 3 is a schematic, cross-sectional representation of the parking lock module of Figure 1;

[0093]

[0088] Figure 4 is an enlarged view of a part of the structural support, in cross-section;

[0094]

[0089] Figure 5 is a view along the axis of the rod, of the module of Figure 1;

[0095]

[0090] Figure 6 is a schematic, perspective representation of the structural support alone;

[0096]

[0091] Figure 7 is a schematic, perspective representation of the structural support alone, according to another view;

[0097]

[0092] [Figure 8 is a schematic representation of a parking lock module according to another example of implementation of the invention.

[0098]

[0093] The features, variants, and different embodiments of the invention can be combined in various ways, provided they are not incompatible or mutually exclusive. In particular, variants of the invention may be conceived comprising only a selection of features, described hereafter in isolation from the other described features, if this selection of features is sufficient to confer a technical advantage and / or to differentiate the invention from the prior art.

[0099]

[0094] Furthermore, ordinal numeral adjectives are used to differentiate features. They do not define the position of a feature. Therefore, for example, a third feature of a product does not mean that the product has a first and / or a second feature.

[0100]

[0095] Figures 1 and 2 show a parking lock module 1 for a vehicle, configured to cooperate with a toothed wheel 2 connected to a shaft of a gearbox 4 or a reducer.

[0101]

[0096] The parking lock module 1 is part of an assembly 65 which also includes the gearbox 4.

[0102]

[0097] The parking lock module 1 includes a movable ratchet 6 between a closed position and an open position (position illustrated in Figures 1 and 2), and having a finger 7 configured to engage, in the closed position, in a recess 8 of the toothed wheel 2, in order to block the rotation of said toothed wheel 2, this ratchet 6 being disengaged from the toothed wheel 2 in the open position.

[0103]

[0098] The parking lock module 1 further includes an actuating mechanism 9 for moving the ratchet 6 from its open position to its closed position, this actuating mechanism 9 comprising:

[0104] - an eccentric 10 having a rotation shaft 1 1 with axis Xe,

[0105] - a rod 12 (see figure 3 in particular) movable by the eccentric 10, between a retracted position (position illustrated in figures 1 and 2) in which the rod 12 is retracted from the pawl 6 and an advanced position in which the rod 12 is advanced towards the pawl 6 to bring the pawl 6 into its closed position,

[0106] - several cam followers 13, here in the form of rollers, carried by a mount 16 at one end of the rod 12, this mount 16 having a U-shape, the cam followers 13 being configured to bear against the pawl 6, on a cam 17 of this pawl 6, to move the pawl 6 towards its closed position,

[0107] - a first spring 18 configured to bring the rod 12 from its retracted position to its advanced position.

[0108]

[0099] The rod 12 extends along a longitudinal axis Xt.

[0109]

[0100] As can be clearly seen in Figure 6, the parking lock module 1 further includes a structural support 19 configured to carry the actuation mechanism 9 and the ratchet 6, and comprising a wall 20 having a slot 21 open on a lower edge 22 of the wall 20 to allow the insertion of the rotation shaft 11 of the eccentric 10 towards a bottom 23 of the slot 21 from said lower edge 22 of the wall 20.

[0110]

[0101] The structural support 19 is made from a single piece of cut and folded sheet metal.

[0111]

[0102] The wall 20 forms part of a side 6 of the structural support 19, as will be detailed further below.

[0112]

[0103] The slot 21 includes a first section 24 open on said lower edge 22 of the wall 20 extended by a second section 25 for positioning to hold the shaft 11 of the eccentric 10 in place in its operating position.

[0113]

[0104] The first section 24 and the second section 25 are inclined relative to each other.

[0114]

[0105] The shaft 11 of the eccentric 10 comes to rest at the bottom 23 of the second section 25 of the slot 21, at the end of insertion.

[0115]

[0106] This configuration has the advantage of allowing quick and easy insertion of the shaft 1 1 of the eccentric 10, onto the structural support 19.

[0116]

[0107] In addition, the invention allows the eccentric 10 to be easily disassembled, if necessary, thanks to the open slot 21.

[0117]

[0108] As can be clearly seen in Figure 6, the structural support 19 has two opposite sides 26, each joined to a U-shaped double wall 27, and the ratchet 6 is held between these U-shaped double walls 27, as illustrated in Figures 2 and 7 for example.

[0118]

[0109] The ratchet 6 is integral with a cylinder 31 which defines an axis of rotation of the ratchet 6 with respect to the structural support 19. For example, the cylinder 31 passes through the double walls 27 in U.

[0119]

[0110] The U-shaped double walls 27 extend into the interior space between the two opposite sides 26.

[0120]

[0111] The structural support 19 includes a rear stop wall 28, formed from a folded tongue 29 (see Figure 4 for example), this rear stop wall 28 being configured to limit the movement of the rod 12 and the mount 16 when they move back beyond the retraction position.

[0121]

[0112] This tab 29 is formed directly from a sheet metal forming the structural support 19.

[0122]

[0113] The rear stop wall 28 is configured to serve as a stop for the mount 16.

[0123]

[0114] In the event of excessive recoil of the rod 12, the mount 16 comes into contact with the rear stop wall 28, thus limiting this movement.

[0115] The rear stop wall 28 has a window 30 configured to allow passage of the rod 12 and the associated spring 18.

[0124]

[0116] The rear stop wall 28 is formed from the tongue 29 extending an upper transverse wall 32 of the structural support 19.

[0125]

[0117] The upper transverse wall 32 of the structural support 19 defines a bearing surface 33, which is flat, for the cam followers 13 carried by the mount 16 at one end of the rod 12.

[0126]

[0118] The flanks 26 extend orthogonally to the upper transverse wall 32, and this upper transverse wall 32 is between these flanks 26.

[0127]

[0119] Each flank 26 occupies one whole side of the structural support 19.

[0128]

[0120] As illustrated in Figures 4 and 6 for example, the rear stop wall 28 is opposite several additional tabs 34 formed on flanks 26 of the structural support 19. These additional tabs 34 are advantageously configured to serve as a retainer for the rear stop wall 28.

[0129]

[0121] These additional tabs 34 are configured to be in contact with the rear abutment wall 28, for example by being welded together. Alternatively, this or these additional tabs 34 are configured to be at a distance from the rear abutment wall 28, and to bear against this or these additional tabs 34 only in the event of deformation under stress.

[0130]

[0122] This allows the rear stop wall 28 to be reinforced.

[0131]

[0123] The structural support 19 is provided with several fixing holes 35 allowing the module 1 to be mounted on a gearbox or reducer housing, in particular using screws.

[0132]

[0124] The structural support 19 can be subjected to heat treatment after the cutting and bending operations. This heat treatment helps to increase the mechanical strength of the part.

[0133]

[0125] The first spring 18 is configured to push the rod 12 towards the advanced position.

[0134]

[0126] When the first spring 18 is in compression, this first spring 18 exerts a force which moves the rod 12 in the direction of the pawl 6, thus enabling the pawl 6 to engage in a hollow 8 of the toothed wheel 2 and to hold it in this closed position.

[0135]

[0127] The first spring 18 is positioned coaxially around the rod 12. The spring 18 is a helical spring.

[0128] One of the free ends 40 of the first spring 18 rests on a sleeve 41 in which the rod 12 can slide, while the other end 42 of the first spring 18 rests on the mount 16, as can be clearly seen in Figure 3.

[0136]

[0129] When the pawl 6 cannot immediately engage in a groove 8 of the gear 2, the rod 12 remains in the retracted position. In this case, the first spring 18 is compressed, which allows energy to be stored. Once the pawl 6 can engage in a groove 8, the spring 18 releases this energy to bring the rod 12 into the advanced position.

[0137]

[0130] The pawl 6 is associated with a second spring 43 (see for example figure 5) which is configured to return the pawl 6 to its open position.

[0138]

[0131] In the open position, this spring 43 exerts a force which raises and moves away the pawl 6 from the toothed wheel 2, allowing the rotation of the latter 2 to be freed.

[0139]

[0132] The second spring 43 has a branch 44 which passes under the ratchet 6.

[0140]

[0133] When the rod 12 is in the advanced position, the cam followers 13 hold the pawl 6 in the hollow 8 of the toothed wheel 2 against the action of the second spring 43.

[0141]

[0134] This second spring 43 ensures a return of the pawl 6 to its open position.

[0142]

[0135] Thus, the first spring 18 acts mainly on the rod 12 to move the cam followers 13 and push the pawl 6 towards its closed position, while the second spring 43 acts directly on the pawl 6 to return it to the open position, once the rod 12 is in the retracted position.

[0143]

[0136] The actuation mechanism 9 includes the sleeve 41 in which the rod 12 can slide between the retracted position and the advanced position.

[0144]

[0137] The sleeve 41 allows the rod 12 to be guided in a substantially linear manner.

[0145]

[0138] The sheath 41 has an external shape 45 substantially in the form of a block or cylinder.

[0146]

[0139] The sleeve 41 has a bearing 46 configured to be mounted with an eccentric pin 47 of the eccentric 10.

[0147]

[0140] The eccentric 10 allows the rotary movement of the eccentric pin 47 to be converted into a reciprocating movement of the rod 12, guided by the sleeve 41.

[0148]

[0141] An elastic ring 48 is fixed to one end of the eccentric pin 47 to link this eccentric pin 47 with the sleeve 41, in the direction of the axis Xe of the shaft 11 of rotation of the eccentric 10.

[0149]

[0142] The elastic ring 48 is configured to come into contact with a face 49 of the sleeve 41.

[0143] Alternatively, as illustrated in Figure 8, the structural support 19 comprises a portion of wall 50 of one of the sides 26 against which the sleeve 41 rests to lock the sleeve 41 laterally, in the direction of the axis Xe of the shaft 11 of rotation of the eccentric 10.

[0150]

[0144] This portion of wall 50 of the structural support 19 replaces the elastic ring 48, in terms of retaining the sleeve 4.

[0151]

[0145] A stop 52 is present on the rear end of the rod 12 to come into contact with the sleeve 41, so that when the sleeve 41 moves back, this sleeve 41 can move the rod 12 back towards the retraction position.

[0152]

[0146] The stop 52 is formed by a collar on the rear end of the rod 12.

[0153]

[0147] Alternatively, a screw is mounted on the rear end of the rod 12 and serves as a stop suitable for cooperating with the sleeve 41. This screw is screwed into a threaded hole in the rod 12. This configuration provides a removable solution. Thus, the screw can be removed to facilitate maintenance / repairability, in particular the replacement of the sleeve 41, the rod 12 itself, or the first spring 18.

[0154]

[0148] The cam followers 13 are configured to bear against the pawl 6, in particular on the cam 17 formed on it, in order to move the pawl 6 towards its closed position.

[0155]

[0149] The mount 16 carries two cam followers 13, of which a first roller is configured to bear on an upper bearing surface 33 of the structural support 19, and a second roller acts on the cam 17 formed on the ratchet 6.

[0156]

[0150] The cam followers 13 are carried by the U-shaped mount 16 fixed to the end of the rod 12.

[0157]

[0151] Each roller 13 is mounted on a rotation axis connecting the parallel arms of the U.

[0158]

[0152] When they reach the closed position, the cam followers 13 exert pressure on the cam 17 of the pawl 6, keeping it engaged in the hollow 8 of the toothed wheel 2.

[0159]

[0153] The eccentric 10 is provided with two flanges 61, 62 bearing on the wall 20 of the structural support 19.

[0160]

[0154] This allows the eccentric 10 to be held in the structural support 19 in the direction of the axis Xe of the shaft 11 of rotation of the eccentric 10, preventing the eccentric 10 from moving laterally while ensuring its rotation around its axis 11.

[0155] The flanges comprise a small flange 61 and a large flange 62 positioned on either side of the thickness of a wall 20 of the structural support 19.

[0161]

[0156] The flanges 61, 62 have dimensions, in particular diameters 63, greater than the distance between two opposite edges along the slot 21 for the insertion of the eccentric 10.

[0162]

[0157] These flanges 61, 62 allow the eccentric 10 to be held without the need for circlips or other additional fixing elements.

[0163]

[0158] The assembly 65 includes an actuator 66 configured to drive the eccentric 10 in rotation about its axis of rotation 1 1.

[0164]

[0159] This rotation makes it possible to convert a rotary motion into a substantially linear motion of the rod 12.

[0165]

[0160] The actuator 66 may include an electric motor. This motor is coupled to the shaft 11 of the eccentric 10 via complementary shapes, such as flats or splines.

[0166]

[0161] The actuator 66 is located outside the gearbox housing 4.

[0167]

[0162] The shaft 11 of the eccentric 10 passes through the housing via an opening fitted with a sealing gasket.

[0168]

[0163] The installation of the parking lock module 1 in the gearbox 4 involves the following steps: supplying a pre-assembled parking lock module 1,

[0169] - install this parking lock module 1 in the gearbox 4.

Claims

DEMANDS

1. A parking lock module (1) for a vehicle, configured to cooperate with a toothed wheel (2), in particular connected to a shaft of a gearbox (4), the parking lock module (1) comprising: - a movable pawl (6) between a closed position and an open position, and comprising a finger (7) configured to engage, in the closed position, in a recess (8) of the toothed wheel (2), in order to block the rotation of said toothed wheel (2), this pawl (6) being disengaged from the toothed wheel (2) in the open position, - an actuation mechanism (9) for moving the pawl (6) from its open position to its closed position, this actuation mechanism (9) comprising: o a rod (12) movable between a retracted position in which the rod (12) is retracted from the pawl (6) and an advanced position in which the rod (12) is advanced towards the pawl (6) to bring the pawl (6) into its closed position, o one or more cam followers (13), in particular one or more rollers (14) or one or more cones (15), carried by a mount (16) at one end of the rod (12), this mount (16) having, for example, a U-shape, the cam follower(s) (13) being configured to bear against the pawl (6), in particular against a cam (17) of this pawl (6), to move the pawl (6) to its closed position, o a first spring (18) configured to bring the rod (12) from its withdrawn position to its advanced position, - a structural support (19) being configured to carry the actuation mechanism (9) and the ratchet (6), and the structural support (19) includes a rear stop wall (28), in particular formed from a folded tongue (29), this rear stop wall (28) being configured to limit the movement of the rod (12) and the mount (16) when they recoil beyond the retraction position.

2. Module (1) according to the preceding claim, wherein the rear stop wall (28) is formed from a folded tongue (29), the tongue (29) being formed directly from a sheet forming the structural support (19).

3. Module (1) according to any one of the preceding claims, wherein the rear stop wall (28) has a window (30) configured to allow passage of the rod (12) and the associated spring (18).

4. Module (1) according to any one of the preceding claims, wherein the rear stop wall (28) is formed from a tongue (31) extending a wall upper transverse (32) of the structural support (19). [Claims] Module (1) according to the preceding claim, wherein the upper transverse wall (32) of the structural support (19) defines a bearing surface (33), which is in particular flat, of the cam follower(s) (13) carried by the mount (16) at one end of the rod (12).

6. Module (1) according to any one of the preceding claims, wherein the rear stop wall (28) is opposite one or more additional tabs (34) formed in particular on flanks (26) of the structural support (19), and this or these additional tabs (34) being advantageously configured to serve as a retainer for the rear stop wall (28).

7. Module (1) according to the preceding claim, wherein these additional tabs (34) are configured to be in contact with the rear stop wall (28), for example by being welded together.

8. Module (1) according to any one of the preceding claims, wherein the actuation mechanism (9) comprises an eccentric (10) having a rotation shaft (11) with axis (Xe), the rod (12) being movable by the eccentric (10), and wherein the structural support (19) is configured to carry the actuation mechanism (9) and the ratchet (6), and comprises a wall (20) having a slot (21) open on an edge (22) of the wall (20) to permit the insertion of the rotation shaft (11) of the eccentric (10) towards a bottom (23) of the slot (21) from said edge (22) of the wall (20), the structural support (19) being made of a single piece, in particular of cut and bent sheet metal.

9. Assembly (65) comprising a parking lock module (1) according to any one of the preceding claims, and a gearbox (4) or a reducer, the parking lock module (1) being configured to cooperate with a toothed wheel (2) connected to a shaft of the gearbox (4) or the reducer.

10. A method for mounting a parking lock module (1) according to any one of the preceding claims, in a gearbox (4) or reduction gear, comprising the following steps: - provide a pre-assembled parking lock module (1), - mount this parking lock module (1) in the gearbox (4) or the reducer.

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