Seat moving structure for utility vehicle
A seat moving structure for a utility vehicle includes a seat and a seat rail for guiding movement of the seat in a longitudinal direction of the seat. The seat has a seat rail contact portion which is in contact with the seat rail. The seat rail has a rail support surface portion which supports the seat rail contact portion from below. The seat rail contact portion is made of a resin. The seat is movably supported in a line contact state or in a point contact state in the longitudinal direction of the seat on the rail support surface portion by the seat rail contact portion.
1. A seat moving structure for a utility vehicle, the seat moving structure comprising:
a seat; and
a seat rail for guiding movement of the seat in a longitudinal direction of the seat,
wherein:
the seat has a seat rail contact portion which is in contact with the seat rail and fixed to a bottom of the seat;
the seat rail has a rail support surface portion which supports the seat rail contact portion from below;
the seat rail contact portion is made of a resin;
the seat is movably supported in a line contact state or in a point contact state in the longitudinal direction of the seat on the rail support surface portion by the seat rail contact portion;
the seat rail includes an opening portion defined in a vertically penetrating manner on a bottom portion;
in a plan view, the opening portion does not overlap with a moving trajectory of the seat rail contact portion which is configured to move on the seat rail in the longitudinal direction of the seat;
in a side view, the opening portion overlaps with the moving trajectory of the seat rail contact portion; and
the opening portion is configured to remain in the vertically penetrating manner in a state where the seat rail is mounted to the utility vehicle.
2. The seat moving structure according to claim 1 , wherein the resin is wear resistant.
3. The seat moving structure according to claim 1 , wherein a lubricant is not interposed between the seat rail contact portion and the rail support surface portion.
4. The seat moving structure according to claim 1 , wherein the seat rail contact portion has a curved surface shape protruding toward the rail support surface portion.
5. The seat moving structure according to claim 4 , wherein the rail support surface portion of the seat rail includes a pair of rail support surface portions in a width direction, and each of the rail support surface portions is inclined downward toward a center of the seat rail in the width direction.
6. The seat moving structure according to claim 4 , wherein the seat rail contact portion has a spherical shape.
7. The seat moving structure according to claim 4 , wherein the rail support surface portion has a curved surface shape, and has a curvature different from a curvature of the seat rail contact portion.
8. The seat moving structure according to claim 1 , wherein the seat rail contact portion includes a roller configured to roll on the rail support surface portion.
9. The seat moving structure according to claim 8 , wherein the roller is one of a plurality of rollers provided in the longitudinal direction of the seat.
10. The seat moving structure according to claim 9 , wherein the rollers are supported in a rolling manner such that the rollers are in a row in the longitudinal direction of the seat inside a bracket which has a U shape cross section which opens downward as viewed in a front view.
11. The seat moving structure according to claim 10 , wherein portions of the bracket which face the rollers in a vertical direction are cut out.
12. The seat moving structure according to claim 1 , wherein the opening portion has an elongated hole shape.
13. The seat moving structure according to claim 1 , wherein the opening portion is defined along the moving trajectory of the seat rail contact portion.
14. The seat moving structure according to claim 1 , wherein:
the opening portion is one of a plurality of opening portions;
the opening portions align in two rows; and
the two rows are respectively positioned at both sides of the moving trajectory of the seat rail contact portion in a vehicle width direction.
15. The seat moving structure according to claim 8 , further comprising a roller assembly which supports the roller in a rotatable manner, wherein the roller assembly is fixed to the bottom of the seat.
16. A seat moving structure for a utility vehicle, the seat moving structure comprising:
a seat; and
a seat rail for guiding movement of the seat in a longitudinal direction of the seat,
wherein:
the seat has a seat rail contact portion which is in contact with the seat rail and fixed to a bottom of the seat;
the seat rail has a rail support surface portion which supports the seat rail contact portion from below;
the seat rail contact portion is made of a resin;
the seat is movably supported in a line contact state or in a point contact state in the longitudinal direction of the seat on the rail support surface portion by the seat rail contact portion;
the seat rail contact portion includes a plurality of rollers configured to roll on the rail support surface portion;
the rollers are supported in a rolling manner such that the rollers are in a row in the longitudinal direction of the seat inside a bracket which has a U shape cross section which opens downward as viewed in a front view; and
portions of the bracket which face the rollers in a vertical direction are cut out.