Motor vehicle seat floor slide rail having a gap elimination structure

1. A motor vehicle seat floor slide rail comprising:

a lower slide rail assembly comprising an aluminum slide rail comprising at least one locking window face extending in a longitudinal direction of the aluminum slide rail and a plurality of lower slide rail locking windows provided at intervals on the locking window face in the longitudinal direction of the aluminum slide rail;

an upper slide rail assembly comprising an upper slide rail and a locking mechanism with a plurality of upper slide rail locking windows provided at intervals on the upper slide rail in a longitudinal direction of the upper slide rail, locking teeth on a locking plate in the locking mechanism, the locking teeth being respectively inserted into the upper slide rail locking windows and the lower slide rail locking windows, realizing locking of the upper slide rail assembly to the lower slide rail assembly and eliminating a longitudinal gap between the upper slide rail assembly and the lower slide rail assembly, wherein unlocking includes the locking teeth on the locking plate of the locking mechanism being withdraw from the lower slide rail locking windows, whereby after unlocking, the upper slide rail assembly is moveable reciprocally on the aluminum slide rail in the longitudinal direction of the upper slide rail;

at least one gap elimination mechanism comprising at least one shaft provided gap elimination cam on at least one end in the longitudinal direction of the upper slide rail, the gap elimination cam having a rotation center axis that is perpendicular to the longitudinal direction of the upper slide rail;

to eliminate a transverse gap and a vertical gap between the upper slide rail assembly and the lower slide rail assembly, the at least one gap elimination mechanism being engageable with one of ends of the locking mechanism and with the upper slide rail assembly wherein a driver drives the gap elimination mechanism to engage with the lower rail in a locked state of the rail assembly.

2. A motor vehicle seat floor slide rail according to claim 1 , wherein the gap elimination mechanism is engageable with one of ends of the locking plate when the locking plate is moved downwards wherein the locking mechanism drives the gap elimination mechanism to disengage with the lower rail assembly.

3. A motor vehicle seat floor slide rail according to claim 1 , further comprising at least another gap elimination mechanism wherein one gap elimination mechanism is positioned at a first end of the upper slide rail assembly and the another gap elimination mechanism is positioned at a second end of the upper slide rail assembly.

4. A motor vehicle seat floor slide rail according to claim 1 , wherein a gap elimination face, extending in the longitudinal direction of the aluminum slide rail, is provided on a bottom face of the locking window face on the aluminum slide rail, and when the upper slide rail assembly and the lower slide rail assembly are in a locked state, a cam face of the gap elimination cam is in contact with the gap elimination face under the action of a force, to eliminate the transverse gap and the vertical gap between the upper slide rail assembly and the lower slide rail assembly; in an unlocked state, the locking mechanism drives an action of the gap elimination cam, such that the cam face of the gap elimination cam loses contact with the gap elimination face.

5. A motor vehicle seat floor slide rail according to claim 1 , wherein:

a cam face on the gap elimination cam has a circular arc cam face section;

a circle center of the circular arc cam face is offset from a rotation center of the gap elimination cam towards the locking mechanism; and

a self-locking angle is formed between a line connecting the rotation center of the gap elimination cam to a point of contact between the cam face and the gap elimination face and a line connecting the circle center of the circular arc cam face to the point of contact between the cam face and the gap elimination face.

6. A motor vehicle seat floor slide rail according to claim 1 , wherein a cross section, along the rotation center axis parallel to the gap elimination cam, of a cam face on the gap elimination cam, is a V-shaped surface or a flat surface or a protruding spherical surface.

7. A motor vehicle seat floor slide rail according to claim 1 , wherein:

the gap elimination mechanism further comprises a cam frame and a gap elimination spring;

the gap elimination cam is mounted on the cam frame;

the cam frame is shaft-provided on at least one end in the longitudinal direction of the upper slide rail; and

a rotation center of the cam frame coincides with the rotation center of the gap elimination cam;

the cam frame has a cam drive arm extending towards the locking mechanism, and an end of the cam drive arm adjacent to the locking mechanism extends to a region below the locking plate in the locking mechanism,

with unlocking, the locking plate in the locking mechanism, when moving downwards, driving the end of the cam drive arm close to the locking mechanism to move downwards, is such that the cam face of the gap elimination cam loses contact with the gap elimination face, the cam drive arm is connected to the upper slide rail by means of the gap elimination spring, and the gap elimination spring applies the force to the cam face of the gap elimination cam by the cam drive arm, such that the cam face of the gap elimination cam is in contact with the gap elimination face.

8. A motor vehicle seat floor slide rail according to claim 1 , wherein the gap elimination mechanism further comprises:

a cam frame;

a gap elimination spring; and

a swing rod, wherein:

the gap elimination cam is mounted on the cam frame; the cam frame is shaft-provided on at least one end in the longitudinal direction of the upper slide rail;

a rotation center of the cam frame coincides with the rotation center of the gap elimination cam;

the cam frame has a cam drive arm extending towards the locking mechanism, and the cam drive arm is provided with an obround hole;

the swing rod is shaft-provided on the upper slide rail and positioned between the cam drive arm and one end of the locking plate in the locking mechanism;

a swing rod drive shaft is provided on the end of the swing rod close to the cam drive arm, with the swing rod drive shaft extending into the obround hole of the cam drive arm; and

an end of the swing rod adjacent to the locking mechanism extends to a region below the locking plate in the locking mechanism,

with unlocking, the locking plate in the locking mechanism, when moving downwards, drives the end of the swing rod adjacent to the locking mechanism to move downwards, such that the end of the swing rod adjacent to the cam drive arm moves upwards, in turn causing the cam face of the gap elimination cam to lose contact with the gap elimination face by means of the cam drive arm, the swing rod is connected to the upper slide rail by the gap elimination spring, and the gap elimination spring applies force to the cam face of the gap elimination cam by the swing rod and the cam drive arm, such that the cam face of the gap elimination cam is in contact with the gap elimination face; compared with a position where the swing rod is shaft-provided on the upper slide rail, a position where the gap elimination spring is connected to the swing rod is closer to the locking mechanism.