Seat track mechanism with adjustable spacer length

1 . A method for manufacturing a seat track mechanism for use with a vehicle seat, the method comprising:

determining a track travel length of a vehicle base track and a rail length of a rail of the vehicle seat;

determining a desired spacer length of a spacer for use with the vehicle base track and the rail of the vehicle seat;

fixing a first spacer member to a second spacer member to form a spacer having the desired spacer length, wherein the first spacer member and the second spacer member each include alternating projections and recesses; and

coupling a first sliding member to the first spacer member and coupling a second sliding member to the second spacer member to form the seat track mechanism.

2 . The method of claim 1 , further comprising mounting the seat track mechanism between the vehicle base track and the rail.

3 . The method of claim 1 , further comprising selecting the first spacer member and the second spacer member from a lot of universal spacer members.

4 . The method of claim 1 , wherein fixing the first spacer member to the second spacer member to form the spacer having the desired spacer length comprises fitting the first spacer member and the second spacer member together without use of a tool.

5 . The method of claim 1 , wherein the first spacer member and the second spacer member physically lock to one another when fixed together.

6 . The method of claim 1 , wherein, when fixing the first spacer member to the second spacer member, the projections of the first spacer member are received in the recesses of the second spacer member and the projections of the second spacer member are received in the recesses of the first spacer member.

7 . The method of claim 1 , wherein the alternating projections and recesses have a constant pitch, and wherein a total length of the spacer may be adjusted by increments of the constant pitch to match the desired spacer length.

8 . The method of claim 1 , wherein the first spacer member and the second spacer member each have a same length, and wherein the same length is equal to a minimum length of the spacer.

9 . A seat track mechanism for sliding in a vehicle base track, the seat track mechanism comprising:

a first sliding member for sliding in the vehicle base track;

a second sliding member for sliding in the vehicle base track;

a first spacer member having a first end fixed to the first sliding member, the first spacer member including alternating projections and recesses; and

a second spacer member having a second end fixed to the second sliding member, the second spacer member including alternating projections and recesses;

wherein the first spacer member and the second spacer member are configured to mate together at a plurality of configurations to form a spacer having a desired spacer length, wherein the plurality of configurations includes a retracted configuration having a minimum length and an extended configuration having a maximum length.

10 . The seat track mechanism of claim 9 , wherein the projections of the first spacer member are received in the recesses of the second spacer member and the projections of the second spacer member are received in the recesses of the first spacer member.

11 . The seat track mechanism of claim 9 , wherein the alternating projections and recesses have a constant pitch, and wherein the desired spacer length may be adjusted by increments of the constant pitch.

12 . The seat track mechanism of claim 9 , wherein the first spacer member and the second spacer member physically lock to one another when mated.

13 . The seat track mechanism of claim 9 , wherein the first spacer member and the second spacer member each have a same length, and wherein the same length is equal to the minimum length.

14 . The seat track mechanism of claim 9 , wherein the first spacer member and the second spacer member are identical.

15 . The seat track mechanism of claim 9 , wherein the first sliding member and the second sliding member each comprise a ball cage containing at least one bearing for riding in the vehicle base track.

16 . The seat track mechanism of claim 15 , wherein:

the seat track mechanism is configured to connect the vehicle base track to a seat rail; and

each ball cage includes a lower bearing for rolling against the vehicle base track, an upper bearing for riding against the seat rail, and a spacer portion of the ball cage disposed between the lower bearing and the upper bearing and configured to separate the lower bearing from the upper bearing.

17 . A vehicle comprising:

a vehicle body;

a vehicle base track coupled to the vehicle body;

a seat rail mounted to a seat and configured for movement with respect to the vehicle base track; and

a seat track mechanism comprising:

a first sliding member for sliding in the vehicle base track;

a second sliding member for sliding in the vehicle base track;

a first spacer member having a first end fixed to the first sliding member; and

a second spacer member having a second end fixed to the second sliding member;

wherein the first spacer member and the second spacer member each include alternating projections and recesses, wherein the first spacer member and the second spacer member are configured to mate together at a plurality of configurations to form a spacer member having a desired length, wherein the plurality of configurations includes a retracted configuration having a minimum length and an extended configuration having a maximum length.

18 . The vehicle of claim 17 , wherein the first sliding member and the second sliding member each comprise a ball cage containing at least one bearing for riding in the vehicle base track, wherein each ball cage includes a lower bearing for rolling against the vehicle base track, an upper bearing for riding against the seat rail, and a spacer portion of the ball cage disposed between the lower bearing and the upper bearing and configured to separate the lower bearing from the upper bearing.

19 . The vehicle of claim 17 , wherein the first spacer member and the second spacer member physically lock to one another when mated.

20 . The vehicle of claim 17 , wherein the first spacer member and the second spacer member are identical.