Mating closure part for a tailgate lock or door lock

Details Mating closure part for a tailgate lock or door lock Mating closure part for a tailgate lock or door lock

1999-05-24

2001-01-02

Dayoan, B. (Department: 3627)

Closure fasteners

Keepers

With movable dog, catch or striker

C292S341130, C292S201000, C292SDIG002

Utility Patent

active

06168217

ABSTRACT:

FIELD AND BACKGROUND OF THE INVENTION
The invention relates to a mating closure part for tailgate lock or door lock comprising a closure part with latch or the like and a mating closure part interacting therewith.
A known lock for a tailgate of a motor vehicle comprises a closure part having a forked rotary latch which, with its fork opening, can engage a closure member of a mating closure part. In a known forked rotary latch, the engaged closure member releases a trip mechanism so that the forked rotary latch is able to pivot. The forked rotary latch is held in the pivoted position by a catch. A forked rotary latch is known, for example, from DE 3 839 568.
The associated mating closure part comprises a closure block or a closure bracket. This bracket is generally connected firmly to a securing plate which is secured on the tailgate or—if the forked rotary latch sits on the tailgate—is secured on the bodywork.
In order to overcome the relatively high forces which occur on closing a tailgate, as a result of the rubber sealing lips to be compressed, closure aids were in the past developed which, for example, provide rotational support for the rotary latch. Proposals have also already been made to take up the closure forces by means of a displacement on the mating closure part.
SUMMARY OF THE INVENTION
It is an object of the invention to provide a mating closure part of the above-described type which is more favorable from the point of view of closure technology, in order in particular to apply a high starting torque.
The object is achieved by the invention wherein in order to generate a starting torque in the closure direction, the closure member, which can have the form of a closure bracket or a closure block, can be displaced from an open position into a closed position. The displacement of the closure member is intended to derive from a displacement of a spindle engagement part, acting as spindle nut, which engages in a thread of a rotationally driven spindle. The spindle can be driven by a motor, for example. For this purpose, the spindle can have a pinion which meshes with a worm gear of a motor shaft. It is further provided that the spindle has two spindle sections which have mutually opposed thread pitches. A spindle nut can sit on each of these threads. A further concept of the invention, also of independent significance, is that the closure member displacement is effected via a scissor hinge arrangement. The closure member can in this case be assigned to the pivot pin of the scissor hinge arrangement. The scissor hinge arrangement has in particular two scissor arms which are connected to each other with a pivot pin. The two arms of the scissor hinge arrangement each engage with their free ends in the thread of the spindle. The openings provided for this purpose act as spindle nuts, which sit on the spindle sections, which have opposed threads. In a position allocated to the closed position, the two arms of the scissor hinge arrangement lie parallel to each other. This has the advantage that the forces occurring in the end stage of the torque movement are the greatest. Because of the two-part spindle, the pivoting of the two scissor hinge arms takes place synchronously in such a way that the pivot pin is displaced on a straight line transverse to the spindle direction when the two free arms or “spindle nuts” are displaced toward or away from each other. In an advantageous development of the invention, the threaded spindle has a bearing collar in the area between the two spindle sections, by means of which bearing collar the spindle is secured on a base plate. The scissor hinge pivot is advantageously a rectilinear continuation of a bracket section. The pivot pin is guided in an oblong hole of the base plate by means of a slide collar. The frame section arranged parallel thereto likewise has, at one end, a plate which is guided in an oblong hole guide. The oblong hole guide is formed by a number of plates which lie one over the other and which, as a stack of plates, together form the base plate. The “spindle nuts”, which are arranged on the arms of the scissor hinge arms, can be formed by the opposite narrow sides of an oblong hole at the end of each arm.


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