Tie-down device
View Patent ↗A tie-down device includes a frame, a strap, a reeling unit, a driving unit and a gear box. The frame includes two walls extending from a base. The reeling unit includes a reel rotationally supported on the walls for reeling the strap. The driving unit is supported on the first wall. The gearbox connects the driving unit to the reeling unit.
1. A tie-down device including:
a frame including a base and first and second walls extending from the base;
a strap;
a reeling unit including a reel rotationally supported on the first and second walls for reeling the strap;
a driving unit supported on the first wall; and
a speed-increasing gearbox including:
a small gear connected to the reel so that they are rotatable together;
a large gear engaged with the small gear and connected to the driving unit;
an axle formed with a butt, rotationally supported on the first wall, and connected to the large gear so that they are rotatable together; and
a clip fit on the axle, wherein the clip is placed against a side of the first wall while the butt is placed against an opposite side of the first wall, thus retaining the axle on the first wall.
2. The tie-down device according to claim 1 , wherein the driving unit includes a coil spring connected to the first wall at an end and connected to the reel at another end.
3. The tie-down device according to claim 2 , wherein the driving unit further includes a cover attached to the first wall for covering the coil spring.
4. The tie-down device according to claim 1 , wherein the driving unit includes a motor supported on the first wall and operatively connected to the speed-increasing gearbox.
5. The tie-down device according to claim 4 , wherein the large gear is operatively connected to the motor.
6. The tie-down device according to claim 5 , wherein the motor includes a mandrel connected to the large gear.
7. The tie-down device according to claim 1 , wherein the first wall includes an outwardly protrusion portion for receiving the butt.
8. The tie-down device according to claim 1 , wherein the gearbox includes a shell attached to the first wall for shielding the small and large gears.
9. A tie-down device including:
a frame including a base and first and second walls extending from the base;
a strap;
a reeling unit including a reel rotationally supported on the first and second walls for reeling the strap;
a driving unit supported on the first wall; and
a speed-increasing gearbox including:
a small gear connected to the reel so that they are rotatable together;
a large gear engaged with the small gear and connected to the driving unit; and
a medium gear provided between the small and large gears.