| 摘要 |
A telescopic boom (10) suitable for a material handling vehicle is provided. The boom comprises two telescopic sections. One end (12a) of an inner tube element (12) is telescopically slideable in one end (14a) of an outer tube element (14) so that a majority length of the inner tube element can be received therein. An intermediate element (16) is also provided, a first end (16a) of which resides within, and is slideable in, the outer tube element (14). A second end (16b) of the intermediate element is telescopically slideable in the end (12a) of the inner tube element (12) that resides inside the outer tube element. A first stop (20) serves to limit withdrawal of the first end (16a) of the intermediate element from the outer tube element (14), whilst a second stop (18) serves to limit withdrawal of the second end (16b) of the intermediate element from the inner tube element (12). The provision of the intermediate element (16) allows a reduced overlap between the telescopic sections (12,14) thus increased reach. |
| 主权项 |
1. A telescopic boom assembly comprising a telescopic boom for a material handling vehicle, the boom comprising an inner tube element, one end of which is telescopically slideable in one end of an outer tube element so that a majority length of the inner tube element can be received therein, and an intermediate element, a first end of which resides within, and is slideable in, the outer tube element and a second end, opposite the first end, being telescopically slideable in the end of the inner tube element that resides inside the outer tube element, a first stop to limit withdrawal of the first end of the intermediate element from the outer tube element, and a second stop to limit withdrawal of the second end of the intermediate element from the inner tube element, the telescopic boom assembly further comprising a hydraulic cylinder having one end fixed relative to the outer tube element and the other end fixed relative to the inner tube element, the cylinder serving to extend and retract the telescopic boom, wherein the intermediate element provides increased structural support against bending forces between the outer and inner tube elements, allowing for reduced overlap between the outer and inner tube elements providing increased boom extension. |
