Tilting side-shifting carriage for a lift truck
First Claim
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1. A carriage for a lift truck, comprising:
- (a) an inner frame adapted to be mounted on a lift truck mast for vertical movement along the mast;
(b) an outer frame including a pair of spaced-apart opposite side members;
(c) a side-shifter mechanism arranged to move the outer frame laterally with respect to the inner frame;
(d) a tilt mechanism arranged to tilt the outer frame with respect to the inner frame, about a laterally-extending tilt axis;
(e) wherein the side-shifter mechanism includes a transverse structural member of the inner frame that defines a side-shifter hydraulic cylinder having a central axis extending transversely with respect to the carriage and also includes a side-shifter piston rod fitted in the side-shifter hydraulic cylinder and movable transversely with respect to the carriage in the side-shifter hydraulic cylinder;
the side-shifter piston rod having an outer end that is securely and rigidly interconnected with one of the side members of the outer frame, whereby the outer frame can be moved laterally with respect to the inner frame by movement of the side-shifter piston rod within the side-shifter hydraulic cylinder;
(f) wherein the side-shifter hydraulic cylinder includes a bearing located within the side-shifter hydraulic cylinder, the bearing thus being located functionally between the side-shifter hydraulic cylinder and the piston rod and providing radial support for the piston rod, and wherein the outer frame is attached to the inner frame and supported with respect to the inner frame by the side-shifter piston rod being located within the side-shifter hydraulic cylinder and supported by the bearing; and
(g) wherein the central axis of the side-shifter hydraulic cylinder is the tilt axis.
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Abstract
A carriage for a lift truck arranged to provide for both lateral shifting and tilting of attachments such as forklift forks, in which an outer frame of the carriage is supported by a side-shifter cylinder-and-piston assembly incorporated in an inner frame, and in which the outer frame can be tilted with respect to the inner frame, about a laterally-extending central axis of the side-shifter cylinder-and-piston assembly.
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Citations
12 Claims
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1. A carriage for a lift truck, comprising:
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(a) an inner frame adapted to be mounted on a lift truck mast for vertical movement along the mast; (b) an outer frame including a pair of spaced-apart opposite side members; (c) a side-shifter mechanism arranged to move the outer frame laterally with respect to the inner frame; (d) a tilt mechanism arranged to tilt the outer frame with respect to the inner frame, about a laterally-extending tilt axis; (e) wherein the side-shifter mechanism includes a transverse structural member of the inner frame that defines a side-shifter hydraulic cylinder having a central axis extending transversely with respect to the carriage and also includes a side-shifter piston rod fitted in the side-shifter hydraulic cylinder and movable transversely with respect to the carriage in the side-shifter hydraulic cylinder;
the side-shifter piston rod having an outer end that is securely and rigidly interconnected with one of the side members of the outer frame, whereby the outer frame can be moved laterally with respect to the inner frame by movement of the side-shifter piston rod within the side-shifter hydraulic cylinder;(f) wherein the side-shifter hydraulic cylinder includes a bearing located within the side-shifter hydraulic cylinder, the bearing thus being located functionally between the side-shifter hydraulic cylinder and the piston rod and providing radial support for the piston rod, and wherein the outer frame is attached to the inner frame and supported with respect to the inner frame by the side-shifter piston rod being located within the side-shifter hydraulic cylinder and supported by the bearing; and (g) wherein the central axis of the side-shifter hydraulic cylinder is the tilt axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification