Vehicle sun roof fastening device

Abstract: A vehicle sun roof fastening device (1), particularly for convertible vehicles, wherein a lever (10) is fitted with a hinged latch element (38) designed to mate with a fixed connecting element (47), and is hinged to a support (3) so as to oscillate in relation to the support (3) and by virtue of a crank mechanism (12) interposed between the lever (10) and the support (3) and operated by a linear actuator (20), the output rod (24, 25) of which is connected to one end of a crank (27a) having the other end angularly integral with a crank (14) on the crank mechanism (12).

Description: The present invention relates to a vehicle hood fastening device, particularly for convertible vehicles. The hood on convertible vehicles is fastened using a manually operated device comprising a bracket integral with the front portion of the hood and supporting a lever, which presents a first end hinged to the bracket, and is fitted on the opposite end with a hinged latch element activated by a crank mechanism. The crank mechanism is located between the bracket and the lever, and is operated manually by the user so as to oscillate the lever between an engaged position, wherein the latch element positively engages a fixed connecting element on the vehicle body, and an idle position wherein the latch element is released from the connecting element. A drawback of known devices of the aforementioned type is the difficulty encountered in connecting the latch element to the fixed connecting element when closing the hood, which involves a good deal of physical effort on the part of the user, and cannot normally be performed when the vehicle is moving. It is an object of the present invention to provide a vehicle hood fastening device designed to overcome the aforementioned drawback. According to the present invention, there is provided a vehicle hood fastening device, in particular for convertible vehicles, the device comprising a supporting bracket fitted integral with the hood; a lever hinged to and oscillating in relation to the bracket about a first axis; a latch element hinged to the lever; means for activating the lever and comprising a first crank having a first end hinged to the bracket so as to oscillate about a second axis, and a connecting rod hinged at one end to a second end of said first crank, and at another end to an intermediate point of said lever; and means for controlling said activating means, for moving said latch element between a forward engaged position, wherein the latch element positively engages a fixed connecting element on the vehicle, and a withdrawn released position; characterized by the fact that said control means comprise a powered rod moving reciprocatingly in relation to said bracket and in a direction perpendicular to the first axis; a second crank connected to said rod so as to rotate about said second axis; and pin means extending along said second axis and connected to both the cranks and said bracket. According to a preferred embodiment of the above fastening device, said pin means are selectable from two different removable connecting pins selectively connectable to said cranks; a first said connecting pin being a first key connected to both said cranks for rendering them angularly integral with each other and with the first connecting pin itself; and a second said connecting pin consisting of a second key angularly integral with the first crank and connected in rotary manner to the second crank. A non-limiting embodiment of the present invention will be described by way of example with reference to the accompanying drawings, in which: Fig.1 shows an exploded view, with parts removed for clarity, of a preferred embodiment of the device according to the present invention; Fig.2 shows a side view of the Fig.1 device; Fig.3 shows a partial view according to arrow A in Fig. 2; Fig.s 4 and 5 show respective sections of the Fig.2 device in two different operating positions; Fig.6 shows a larger-scale section along line VI-VI in Fig. 4; Fig.7 shows the same view as in Fig. 6, of a variation of a detail on the Fig.6 device. Number 1 in the accompanying drawings indicates a fastening device for the hood 2 (shown partially) of a convertible vehicle (not shown). Device 1 comprises a U-shaped supporting bracket 3 in turn comprising a bottom wall 4 fittable in known manner to hood 2, and two lateral walls 6. At one end, walls 6 project beyond the edge of wall 4 so as to define a fork 7, and, at the other, present respective appendixes 8 projecting from walls 6 on the opposite side to wall 4 and defining a second fork 9. Device 1 also comprises a lever 10 having an end portion located between and hinged to walls 6 by a pin 11 adjacent to fork 9; and a crank mechanism 12 located between lever 10 and bracket 3, for oscillating lever 10 in relation to bracket 3 and about an axis 13 perpendicular to walls 6. Crank mechanism 12 comprises a crank 14 having a small end 15 hinged to fork 7 so as to oscillate about an axis 16 parallel to axis 13; and a connecting rod 17 having one end hinged to crank 14, and the opposite end hinged by a pin 18 to an intermediate portion of lever 10. Crank mechanism 12 is activated by a control device 19 comprising an electromechanical linear actuator 20 having a screw-nut screw output coupling 21 and the outer casing of which is hinged to fork 9 by a pair of pins 22 parallel to axes 13 and 16. Actuator 20 comprises a nut screw (not shown) rotated about its axis by an electric motor 23; and a screw 24 connected to the nut screw (not shown) and extending perpendicular to axes 13 and 16. Screw 24 terminates with a fork 25, the arms 26 of which are hinged to a first end of a crank 27a consisting of two arms 27 parallel to each other and extending on either side of crank mechanism 12. Each arm 27 presents a second end extending between small end 15 of crank 14 and a respective wall 6, and which presents an externally cylindrical hub 28 facing respective wall 6 and engaging in rotary manner a hole 29 formed through wall 6 and coaxial with axis 16, for hinging respective arm 27 to bracket 3. On the opposite side to hubs 28, arms 27 present respective cylindrical bushes coaxial with axis 16 and defining a seat 30 engaged in rotary manner by small end 15. Hubs 28 present respective substantially rectangular-section holes 31 aligned along axis 16 with each other and with a further hole 32 formed through small end 15 of crank 14 and of the same size and cross section as holes 31. Crank 27a is made angularly integral with crank 14 via a key 33 comprising a portion 34 having a cross section complementary to that of holes 31 and 32 and which engages holes 31 and 32 in axially-sliding angularly-fixed manner. Key 33 also comprises a further externally-threaded portion 35 supporting a knob 36, projecting entirely outwards of a respective wall 6, and blending with portion 34 via a cylindrical shoulder which is maintained contacting the outer surface of wall 6 by a retaining ring 37 fitted on to the end portion of portion 34 projecting outwards of the other wall 6. Finally, device 1 comprises a latch element 38 in turn comprising a fork 39, the arms 40 of which are hinged to the free end of lever 10 by a pin 41 parallel to axes 13 and 16; and a hook 42 integral with a crosspiece on fork 39 and having its concavity facing a mating pin element 43 integral with vehicle body 44 and facing the front edge of hood 2 in the closed position. Element 38 is rotated about the axis of pin 41 by a cam system 45 comprising a cam 46 integral with small end 15 of crank 14; and a tappet element 47 defined by a substantially triangular plate integral with fork 39 and having a substantially S-shaped edge 48 on the side facing cam 46. System 45 also comprises a spring 49, preferably a double pin spring, interposed between lever 10 and fork 39 for holding edge 48 of tappet element 47 permanently contacting edge 50 of cam 46. Operation of device 1 will now be described as of the Fig.4 condition, wherein hood 2 is in the closed position, latch element 38 is withdrawn and disengaged from mating element 43, and crank 14 and arms 27 are secured angularly to one another by key 33. As of the above condition, operation of electric motor 23 displaces screw 24 so as to rotate arms 27 anticlockwise in Fig. 4, and so rotate crank 14, and move lever 10 clockwise about axis 13 and, consequently, latch element 38 from the withdrawn position to a forward operating position (Fig.5) wherein hook 42 positively engages element 43. As element 38 moves from the withdrawn to the forward operating position, cam 46 rotates about axis 16, and tappet element 47 rotates element 38 about pin 41 and in relation to lever 10, so as to position hook 42 beneath mating element 43. At this point, further anticlockwise rotation (in Fig.5) of crank 27a by actuator 20 results in further clockwise rotation of lever 10 about axis 13, so as to move hook 42 towards bracket 3 and so perfectly close hood 2. As shown in Fig.7, in the event of failure of electric motor 23, so that hood 2 cannot be fastened automatically, device 1 may also be operated manually by simply removing key 33, by torquing knob 36 on threaded portion 35 of key 33 so as to extract ring 37 from its seat, and replacing it with a control device 51 comprising a handle 52 with a key 53. Again with reference to Fig.7, key 53 comprises an end portion 54 connected to handle 52 by a cylindrical pin 55 engaging in rotary manner a respective hole 31. Portion 54 engages hole 32 on small end 15 of crank 14, and presents the same cross section as portion 34 of pin 33, and a length approximately equal to but no longer than hole 32 measured along axis 16, so as to enable operation of crank 14 alone, when pin 53 is torqued manually.

Claims: A vehicle hood fastening device (1), in particular for convertible vehicles, the device (1) comprising a supporting bracket (3) fitted integral with the hood (2); a lever (10) hinged to and oscillating in relation to the bracket (3) about a first axis (13); a latch element (38) hinged to the lever (10); means (12) for activating the lever (10) and comprising a first crank (14) having a first end hinged to the bracket (3) so as to oscillate about a second axis (16), and a connecting rod (17) hinged at one end to a second end of said first crank (14), and at another end to an intermediate point of said lever (10); and means (19, 51) for controlling said activating means (12), for moving said latch element (38) between a forward engaged position, wherein the latch element (38) positively engages a fixed connecting element (43) on the vehicle, and a withdrawn released position; characterized by the fact that said control means (19) comprise a powered rod (24, 25) moving reciprocatingly in relation to said bracket (3) and in a direction perpendicular to the first axis (13); a second crank (27a) connected to said rod (24, 25) so as to rotate about said second axis (16); and pin means (33; 53) extending along said second axis (16) and connected to both the cranks (14)(27a) and said bracket (3). A device as claimed in Claim 1, characterized by the fact that said pin means (33; 53) are selectable from two different removable connecting pins (33)(53) selectively connectable to said cranks (14)(27a); a first said connecting pin being a first key (33) connected to both said cranks (14)(27a) for rendering them angularly integral with each other and with the first connecting pin (33) itself; and a second said connecting pin consisting of a second key (53) angularly integral with the first crank (14) and connected in rotary manner to the second crank (27a). A device as claimed in any one of the foregoing Claims, characterized by the fact that it comprises a cam element (46), and a tappet element (47) on said latch element (38); the tappet element (47) cooperating with said cam element (46) for rotating the latch element (38) in relation to said lever (10) and about a third axis (41) substantially parallel to said first axis (13). A device as claimed in Claim 3, characterized by the fact that said cam element (46) is mounted for rotation about said second axis (16) and is integral with the first crank (14); and by the fact that elastic reaction means (49) are provided for maintaining said tappet element (47) contacting said cam element (46).

Inventors: FILIPPI ALDO, FILIPPI, ALDO
Applicants: ROLTRA MORSE SPA, ROLTRA MORSE S.P.A.
Application year: 1993
Main classification: B60J7
IPC codes: B60J7, E05B65