EP3042014A1

EP3042014A1 - Lock for a motor vehicle door

Info

Publication number: EP3042014A1
Application number: EP14758942.8A
Authority: EP
Inventors: Laurent Duriez; François DEBROUCKE; Cédric LAMIDON
Original assignee: U Shin France SAS
Current assignee: Minebea AccessSolutions France SAS
Priority date: 2013-09-04
Filing date: 2014-09-04
Publication date: 2016-07-13
Anticipated expiration: 2034-09-04
Also published as: CN105531432A; FR3010122A1; CN105531432B; BR112016002515A2; FR3010122B1; EP3042014B1; WO2015032844A1; BR112016002515B1

Abstract

The invention relates to a lock for a motor vehicle door comprising: - a counterplate (3) intended to be fastened to a motor vehicle door, - a bolt (5) and a bolt pin (7), the bolt (5) being intended to cooperate with a strike and able to rotate around the bolt pin (7) between an open position and a closed position of the lock, and a pawl (6) comprising a pivoting pawl pin (10) and a retaining end (11) able to cooperate with said bolt (5) in the closed position of the lock to prevent the rotation of the bolt (5), characterised in that said lock comprises a guide element (41; 42; 43; 44; 45; 46) in which at least one guide hole (12) is arranged to guide the rotation of the pawl pin (10) and in that the lock comprises at least one reinforcing pillar (14, 15; 21, 22) maintaining the guide element, said guide element (41; 42; 43; 44; 45; 46) being separated from the bolt pin (7).

Description

LOCK FOR OPENING OF MOTOR VEHICLE

TECHNICAL FIELD The present invention relates to a lock for an opening of a motor vehicle, in particular for a door, a tailgate, a tailgate bezel or a trunk of a motor vehicle.

STATE OF THE ART

The retention portion of conventional locks generally comprises a metal counterplate, also called outer plate, and a plate, also called inner plate, the against-plate being in abutment against the sheet metal of the opening of the motor vehicle.

For the locks whose pawl is secured to the pawl pin, also called "ratchet tree", the pawl pin is held pivotally by the plate and against the plate, which ensure its holding and its pivoting guide.

The locking of the lock is performed either by the plate or by the plate against. When the fixing of the lock is performed by the plate, it has tapped holes aligned with corresponding holes of the plate against, the number and position of the threads of the plate being imposed by the manufacturer. The mounting of the lock to the vehicle thus allows at the same time to fix the plate together with the plate against.

To position all fixing points imposed by the manufacturer, the plate must have a large surface, of the order of that of the plate against. However, the use of large and complex metal parts penalize the lock product by increasing its cost and weight, these being mainly determined by the mass of metallic material present in the lock.

In addition, it is not possible to derogate from the use of metal parts for the retention part which undergoes the efforts during a crash. SUMMARY OF THE INVENTION

One of the aims of the present invention is to remedy these problems by proposing a lock whose mass and cost are reduced, while satisfying the performance of mechanical strength.

For this purpose, the subject of the invention is a lock for an opening of a motor vehicle comprising:

- a counterplate intended to be fixed to an opening of a motor vehicle,

- A bolt and a bolt axis, the bolt being adapted to cooperate with a latch and capable of rotating about the bolt axis between an open position and a closed position of the lock, and

a pawl comprising a pivoting pawl axis and a retaining end adapted to cooperate with said bolt in the closed position of the lock to prevent rotation of the bolt,

characterized in that said lock comprises a guide element in which at least one guide hole is provided for the rotational guidance of the pawl axis and in that the lock comprises at least one reinforcing pillar holding the element of guide, said guide member being disjoint from the bolt axis.

Fixing the lock in the edge of the opening is thus achieved by the counterplate. The lock no longer comprises platinum as in the prior art but a guide element whose main role is limited to guiding the rotation of the pawl axis and the mechanical strength of the lock. The guide element no longer takes the attachment points of the counterplate of the state of the art but uses the reinforcing pillar to ensure its mechanical strength relative to the against-plate. The lock without platinum is lightened and its cost is reduced. The reinforcing pillar makes it possible to compensate for the fact that, in the case of a tree pawl, the pawl pin is pivotally mounted.

This solution also has the advantage that the interfaces of the motor vehicle, such as the number and positioning of attachment points to the opening of the motor vehicle, or such as the connection to the actuating parts of the various operating kinematics of the lock, can be kept without modifications. The lock is thus slightly modified, which allows the use of standard elements of the lock. According to an exemplary embodiment, a notch of the bolt intended to cooperate with the retaining end of the pawl is housed under the guide element in the closed position. In addition, the guide element is received in a housing of the lock.

This prevents the bolt to lie down or escape the pawl in the closed position of the lock. The shape of the guide element is thus reduced to its rotational guiding functions of the pawl axis, holding and axial stop of the bolt.

The interest that the guide element is received in the housing of the lock is that the housing then forms a cover covering the retention part. This arrangement makes it possible to better manage the tightness of the lock by reducing the risks of migration of water or dust towards the kinematic part.

According to an exemplary embodiment, a reinforcing pillar is a reinforcing pin separate from the guide element, fixed to the counterplate and to the guide element.

According to an exemplary embodiment, the fixing of the reinforcing pin to the guide element is carried out by deformation of material or by welding.

According to an exemplary embodiment, a reinforcing pillar is a reinforcing tab, formed in one piece with the guide element and whose end is fixed to the counterplate.

According to an exemplary embodiment, at least one reinforcing pillar is arranged next to the pawl axis. The shortest distance between a tangent to the guide hole of the pawl axis and the reinforcing pillar is between 0.5 and 10 millimeters. This brings the reinforcing pillar as close as possible to the pawl axis while limiting the risks of parasitic friction with the moving parts taking into account their tolerances and also avoiding possible blockages of the moving parts in case of freezing by retention in the interstice.

In another example, the shortest distance between a tangent to the guide hole of the pawl axis and at least one reinforcing pillar is greater than 10 millimeters and is less than 25 millimeters. The reinforcing pillar can then be arranged further, for example out of a deflection zone of the actuating wing of the false ratchet. According to an exemplary embodiment, the lock comprises an additional reinforcing pillar formed by an additional reinforcement pin separate from the guide element, fixed to the counterplate and / or to the guide element, to reinforce the mechanical strength. lock.

According to an exemplary embodiment, the reinforcing pin and / or the additional reinforcing pin is only fixed by screwing to the guide element or to the counterplate.

According to an exemplary embodiment, said guide element has two bearings, the guide hole cooperating with the pawl axis being formed in a first bearing and a second bearing being bonded to the counterplate.

SUMMARY DESCRIPTION OF THE DRAWINGS

Other advantages and characteristics will appear on reading the description of the invention, as well as the following figures in which:

FIG. 1 is a perspective view of elements of a lock for a motor vehicle door according to a first embodiment, viewed from the inside, with a housing in partial section,

FIG. 2 is a view of the lock similar to FIG. 1, without casing, in the second notch locking position,

FIG. 3 is a perspective view of the back of the lock of FIG. 2, FIG. 4 is an exploded view of the lock of FIG. 2,

FIG. 5 represents a perspective view of the locking element of the lock of FIG. 4,

FIG. 6 represents a perspective view of an alternative embodiment of the lock of FIG. 1,

FIG. 7 represents a perspective view of the guiding element of the lock of FIG. 6,

FIG. 8 represents a perspective view of elements of a lock for a motor vehicle opening according to a second embodiment, FIG. 9 represents a perspective view of the guide element of the lock of FIG. 8, FIG. 10 represents a perspective view of elements of a lock for a motor vehicle door according to a third embodiment, FIG. 11 represents a perspective view of the guide element of the lock of FIG. 10,

FIG. 12 represents a perspective view of elements of a lock for a motor vehicle opening according to a fourth embodiment, FIG. 13 represents a perspective view of the guide element of the lock of FIG. 12,

FIG. 14 represents a perspective view of elements of a lock for a motor vehicle door according to a fifth embodiment, and FIG. 15 represents a perspective view of the guide element of the lock of FIG. 14.

In all the figures, the identical elements bear the same reference numbers. For a better understanding of the invention, only the elements involved in the invention have been represented.

DETAILED DESCRIPTION

Figures 1 to 5 show elements of a lock 1 for a motor vehicle opening according to a first embodiment.

The lock 1 comprises a housing 2 for example made of plastic material, a metal counter plate 3, also called outer plate, for example sheet metal, closing the housing 2 by defining a retention compartment.

The metal counterplate 3 comprises fastening means for fastening the lock to an opening of a motor vehicle by screwing, such as three fastening orifices 8 surrounded by a threaded collar extending on the side of the opening.

The retention compartment houses the lock retention elements, such as a bolt 5 and a pawl 6 (Figure 4).

The bolt 5 has the general shape of a fork defining a notch 5a which in the closed position of the lock receives and retains a striker (not shown) attached to the body of a motor vehicle, in the edge of the opening. The bolt 5 is rotatably mounted on a bolt axis 7 of the lock fixed to the counter plate 3. In the example shown, the bolt axis 7 has a radial shoulder 7a for holding the bolt 5 (FIG. ). An elastic return means of the bolt 5 (not shown), such as a torsion spring, is received above the radial shoulder 7a.

The pawl 6 is called "ratchet" because it comprises a pawl axis 10 and a retaining end 1 1 integral in rotation, obtained for example from two separate parts that have been joined or directly formed in one piece ( Figure 4).

The retaining end January 1 is adapted to cooperate with a notch of the bolt 5 to prevent rotation of the bolt 5 in the closed position of the lock. In the example illustrated in the figures, the lock has two closed positions: a closed position at the first notch in which the pawl 6 cooperates with a first notch 5b of the bolt 5 and a closed position at the second notch in which the pawl 1 1 cooperates with a second notch 5c of the bolt 5.

The bolt 5 is thus pivotable relative to the bolt axis 7 fixed, between the closed positions first and second notch and an open position of the lock.

The lock further comprises a guide element 41 made of metallic material for holding and guiding the pawl pin 10. Thus, the pawl pin 10 is held pivotally by a guide hole 12 formed in a plate 9 of the guide element 41 on the one hand, and a hole of the counterplate 13 on the other hand (Figure 4). The guide hole 12 of the guide element 41 and the hole of the counterplate 13 are, for example, bores.

For its maintenance, the guide element 41 is disjointed from the bolt axis 7. In other words, the guide element 41 is not connected to the bolt axis 7. In contrast, the lock 1 also comprises at least one reinforcing pillar holding the guide element 41.

In the embodiment of FIGS. 1 to 5, the reinforcing pillar is formed by a reinforcing tab 14 made in one piece with the guide element 41.

The reinforcing tab 14 and the guide element 41 are for example obtained by folding. The reinforcing tab 14 is for example folded perpendicular to the plane defined by the plate 9 of the guide element 41. The end 16 of the reinforcing lug 14 is for example fixed to the counterplate 3 by deformation of material, such as by riveting or punching, at the rear of an associated reinforcing hole formed in the counterplate 3. According to another fixing example, the end 16 of the reinforcing tab is welded to the counterplate 3.

The reinforcing tab 14 is for example arranged next to the pawl axis 10. It is thus expected to bring as much as possible the reinforcing pillar of the pawl axis 10 while limiting the risk of parasitic friction between the moving parts. taking into account their tolerances and also avoiding possible blockages of moving parts in the event of freezing by retention in the interstice. The shortest distance d1 between a tangent to the guide hole 12 of the pawl axis 10 and the reinforcing tab 14 is for example between 0.5 and 10 millimeters, such as of the order of 1 millimeter (FIG. 5).

In another example, the shortest distance d2 between a tangent to the guide hole 12 of the pawl axis 10 and the reinforcement tab (not shown) is greater than 10 millimeters and is less than 25 millimeters. The reinforcement lug 14 is then arranged farther out of a deflection zone of the actuating wing 18 of the ratchet 20.

The fastening of the lock in the edge of the opening is thus achieved by the counterplate 3. The lock no longer comprises platinum as in the prior art but a guide element whose main role is limited to guiding the rotation of the door. ratchet pin 10 and the mechanical strength of the lock 1. The guide element 41 no longer takes up the fixing points of the back plate 3 of the state of the art but uses the reinforcing pillar to ensure its mechanical strength with respect to the counterplate 3. The lock without a plate is lightened and its cost is decreased. The reinforcing pillar makes it possible to compensate for the fact that, in the case of a tree pawl 6, the pawl axis 10 does not participate in the mechanical connection with the counterplate 3, since it is pivotally mounted.

This solution also has the advantage that the interfaces of the motor vehicle, such as the number and positioning of attachment points to the opening of the motor vehicle, or such as the connection to the actuating parts of the various operating kinematics of the lock, can be kept without modifications. The lock 1 is thus slightly modified, which allows the use of standard elements of the lock. According to an exemplary embodiment, a notch of the bolt 5 intended to cooperate with the retaining end 1 1 of the pawl 6 is housed under the plate 9 of the guide member 41 in the closed position. In the case of a bolt comprising two notches 5b, 5c, the first notch 5b of the bolt 5 is received under the plate 9 in the first notch position. The second notch 5c of the bolt 5 is received under the plate 9 in the second locking position (Figure 2).

Since the housing 2 overcomes the guide member 41, nothing is interposed between the bolt 5 and the guide member 41 so that the bolt 5 is directly housed under the plate 9. The guide member 41 then serves as an axial stop for the bolt 5 when the lock 1 is closed, thus preventing the bolt 5 from lying down or escaping from the pawl 6.

The guiding element 41 thus has a shape just for keeping the guide hole 12 in the plate 9 extended on one side by the reinforcement lug 14, the plate 9 forming an axial stop for the bolt 5. The shape of the lug Guiding element 41 is thus reduced to its rotational guiding functions of the pawl axis 10, holding and axial stop bolt 5.

The interest that the guide element 41 is received in the housing 2 is that the housing 2 then forms a cover covering the retention part. This arrangement makes it possible to better manage the tightness of the lock by reducing the risks of migration of water or dust towards the kinematic part.

In a variant represented by FIGS. 6 and 7, the lock comprises two reinforcing tabs 14, 15 arranged next to the pawl axis 10.

The reinforcing tabs 14, 15 extend for example substantially on either side of the plate 9 of the guide element 42 in which is formed the guide hole 12. The shortest distance d2 between a tangent to the hole 12 of the ratchet pin 10 and the additional reinforcement lug 15 is greater than 10 millimeters and is less than 25 millimeters. The mechanical strength of the lock is thus reinforced by this second reinforcing pillar. In addition, the plate 9 has a larger surface to lock the axial displacement of the bolt 5 in the closed position.

According to a second embodiment shown in FIGS. 8 and 9, the reinforcing pillar is distinct from the guiding element 43. The reinforcing pin is, for example, formed by a reinforcing pin 21 fixed to the counter-plate 3 and to the guide element 43. The reinforcing pin 21 is arranged parallel to the pawl axis 10.

The reinforcing pin 21 is for example fastened to the counter-plate 3 and to the guide element 43 by welding or deformation of material, such as by riveting, in a reinforcing hole 17 formed in the plate 9 of the guiding element 43 and an associated reinforcing hole in the counter plate 3 (Figure 9). The guiding element 43 then provides a mechanical holding both radial and axial of the pawl axis 10.

Alternatively, the reinforcing pin 21 is only screw-fastened to the guide member 43 or to the counter plate 3. The attachment to the guide member 43 or against the plate-plate 3 then ensures a strengthening of the holding radial mechanism of the ratchet pin 10. The side of the reinforcing pin 21 which is not threaded may have a head of complementary shape of the associated reinforcing hole of the guide member 43 or against the plate 3 for in particular, avoid swiveling of the reinforcing pin 21. The lock may further comprise a spacer interposed between the guide member 43 and the counter plate 3 to ensure the spacing between the two parts.

The lock 1 also comprises generally a false ratchet 20 having an actuating wing 18 intended to cooperate with a lever of the kinematics of the lock (Figure 1). The false ratchet 20 rotates integrally with the pawl 6. It is then expected that the reinforcing pin 21 is fixed to the plate 9 of the guide member 43 outside a deflection zone of the actuating wing 18 of the false -cliquet 20, so as to leave the field free for the actuating wing 18 and thus avoid the risk of friction between the false pawl 20 in motion and the protruding end of the reinforcing pin 21.

According to a variant shown in Figures 10 and 1 1, the lock comprises an additional reinforcing pillar 22 formed by a reinforcing pin separate from the guide member 44, fixed to the counterplate 3 or to the guide element 44.

As before, the reinforcing pin 21 is for example fixed to the counterplate 3 and to the guide element 44 by welding or deformation of material.

The additional reinforcing pin 22 is fixed to the counterplate 3 and / or to the guide element 44, for example by welding or by deformation of material.

Alternatively, the additional reinforcement pin 22 is only screw-fastened to the guide element 44 or to the counterplate 3. The attachment to the element guidance 44 or the counter-plate 3 then ensures a strengthening of the radial mechanical strength of the pawl pin 10. The side of the additional reinforcing pin 22 which is not threaded may have a complementary shape head of the hole of additional reinforcement 19 of the guide element 44 or against the plate against 3 in particular to avoid the swiveling of the additional reinforcing pin 22.

According to an exemplary arrangement, the second reinforcing pin 17 cooperates with the guide element 44 at the rear of the deflection zone of the actuating wing 18 with respect to the pawl axis 10.

According to another embodiment shown in FIGS. 12 and 13, the lock comprises a reinforcing pillar formed by a reinforcement lug 14 in one piece with the guiding element 45 and an additional reinforcing pillar formed by a pawn. additional reinforcement 22.

The guide element 45 may also comprise a support 27 for immobilizing the false pawl 20 in the rest position. The support 27 can also receive a damper false-ratchet 20 to reduce the noise of the lock.

According to another embodiment shown in Figures 14 and 15, the guide member 46 has two bearings. The first bearing is formed by the plate 9 in which at least the guide hole 12 cooperating with the pawl axis 10 is formed. The second bearing 23 is fixed to the counterplate 3.

The second bearing 23 comprises a fixing orifice 24 coinciding with a corresponding fixing orifice of the counterplate 3, for fixing between the guide element 46 and the counterplate 3, for example with the aid of a axis, for example riveted or welded, or with a screw.

In the example illustrated in Figures 14 and 15, the lock further comprises an outer opening axis 25 for cooperating with an opening lever outside the lock. The outer aperture axis 25 is used as pivot for pivoting of the outer aperture lever (not shown) and one end of this outer aperture axis 25 is attached to the counterplate 3. The localization of this end to fix by welding or by deformation of material, such as by riveting, the second bearing 23 the guide element 46 with the against-plate 3 because the location of the end of the opening axis outer 25 may be suitable for both of these functions. The cost of the lock is thus reduced by using the outer opening axis 25 to improve the mechanical strength of the retention part.

Claims

1. Lock for a motor vehicle door comprising:

a counter-plate (3) intended to be fixed to an opening leaf of a motor vehicle,

- a bolt (5) and a bolt axis (7), the bolt (5) being intended to cooperate with a latch and capable of rotating about the bolt axis (7) between an open position and a closed position of the lock, and

a pawl (6) comprising a pivoting pawl axis (10) and a retaining end (1 1) capable of cooperating with said bolt (5) in the closed position of the lock to prevent rotation of the bolt (5),

characterized in that said lock comprises a guide member (41; 42; 43; 44; 45; 46) in which at least one guide hole (12) is provided for rotational guidance of the ratchet pin (10). ) and in that the lock comprises at least one reinforcing pillar (14, 15; 21, 22) holding the guide element, said guide element (41; 42; 43; 44; 45; 46) being disjointed from the bolt axis (7).

2. Lock according to claim 1, characterized in that a notch of the bolt (5) intended to cooperate with the retaining end (1 1) of the pawl (6) is housed under the guide element (41; 42, 43, 44, 45, 46) in the closed position.

3. Lock according to one of claims 1 or 2, characterized in that the guide member (41; 42; 43; 44; 45; 46) is received in a housing (2) of the lock.

4. Lock according to one of the preceding claims, characterized in that a reinforcing pillar is a reinforcing pin (21) separate from the guide element (43; 44; 46) fixed to the counter-plate ( 3) and the guide element (43; 44; 46).

5. Lock according to claim 4, characterized in that the fixing of the reinforcing pin (21) to the guide element (43; 44; 46) is achieved by deformation of material or by welding.

6. Lock according to one of the preceding claims, characterized in that a reinforcing pillar is a reinforcing tab (14, 15) formed integrally with the guide element (41; 42; 45). and whose end (16) is attached to the counterplate

(3).

7. Lock according to one of the preceding claims, characterized in that at least one reinforcing pillar (14, 15; 21, 22) is arranged next to the pawl axis (10).

8. Lock according to claim 7, characterized in that the shortest distance (d1) between a tangent to the guide hole (12) of the pawl pin (10) and the reinforcing pillar (14; 21) is between 0.5 and 10 millimeters.

Lock according to one of the preceding claims, characterized in that the shortest distance (d2) between a tangent to the guide hole (12) of the pawl pin (10) and at least one reinforcing pillar ( 15; 22) is greater than 10 millimeters and is less than 25 millimeters.

10. Lock according to one of the preceding claims, characterized in that it comprises an additional reinforcing pillar formed by an additional reinforcing pin (22) separate from the guide element (44; 45), fixed to the against -plate (3) and / or to the guide element (44; 45).

1 1. Lock according to one of claims 10 or 4, characterized in that the reinforcing pin (21) and / or the additional reinforcing pin (22) is only screw-fastened to the guide element (43; 44; ) or against the plate (3).

12. Lock according to one of the preceding claims, characterized in that said guide member (46) has two bearings, the guide hole (12) cooperating with the pawl axis (10) being formed in a first bearing and a second bearing (23) being connected to the counterplate (3).