Walking conversion mechanism of highway-railway dual-purpose hydraulic excavator
A technology of hydraulic excavator and conversion mechanism, which is applied in the direction of earth mover/excavator, track and road dual-purpose vehicle, motor vehicle, etc.
Inactive Publication Date: 2018-01-23
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology
[0004] The above two technical solutions for the conversion device of the traveling mechanism of the road-rail vehicle have shortcomings. The first technical solution needs to allow the road-rail vehicle to drive to the level crossing to complete the road-railway mode conversion
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[0026] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings. The interpretation of each label in the figure is: 1-vehicle slewing device, 2-reducer, 3-hydraulic motor, 4-hydraulic control locking device, 5-the first One-way valve, 6-second one-way valve, 7-first relief valve, 8-second relief valve, 9-first three-position four-way electromagnetic reversing valve, 10-oil tank, 11-filter , 12- vehicle lifting device, 13- the first hydraulic cylinder group, 14- the second hydraulic cylinder group, 15- the first hydraulic cylinder, 16- the second hydraulic cylinder, 17- the third hydraulic cylinder, 18- the fourth hydraulic cylinder Cylinder, 19-first accumulator, 20-second accumulator, 21-second three-position four-way electromagnetic reversing valve, 22-third three-position four-way electromagnetic reversing valve, 23-first throttling Valve, 24-second throttle valve, 25-two-position two-way electromagne...
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The invention discloses a walking conversion mechanism of a highway-railway dual-purpose hydraulic excavator. The walking conversion mechanism comprises a hydraulic system and a mechanical structure;the mechanical structure comprises a front walking conversion mechanism body and a rear walking conversion mechanism body, the front walking conversion mechanism body is arranged on the front side ofthe lower portion of an excavator chassis, the rear walking conversion mechanism body is installed on the rear side of the lower portion of the excavator chassis, and the front walking conversion mechanism body and the rear walking conversion mechanism body are all the same in structure and are symmetrically arranged. The walking conversion mechanism further comprises a whole vehicle lifting device hydraulic cylinder, the upper end of the whole vehicle lifting device hydraulic cylinder is fixedly connected with the excavator chassis, the lower end of the whole vehicle lifting device hydrauliccylinder is connected with a circular gear disc, and the circular gear disc is matched with the square chassis below the circular gear disc; the hydraulic system comprises an oil tank, a hydraulic pump, a whole vehicle rotation device, a whole vehicle lifting device and a rail steel wheel winding and unwinding device. According to the mechanism, the action of an upper rail body can be completed bymeans of the walking conversion mechanism of a steel rail under the condition that the steel rail is not damaged, then a highway mode is switched to a railway mode, and the situation that a special level crossing is needed or a railway ballast is additionally paved manually is avoided.
Description
technical field [0001] The invention relates to a traveling mechanism of a track and road dual-purpose vehicle, in particular to a traveling conversion mechanism of a road-rail dual-purpose hydraulic excavator. Background technique [0002] my country's railway mileage ranks first in the world, and the high-speed railway mileage ranks first in the world. With the advancement of urbanization, more and more cities have begun to build subways. The railway system needs to undertake heavy passenger and freight transportation tasks, so track cleaning and maintenance along the line are particularly important. Excavators are widely used in various industries of national economic construction and play an irreplaceable role in engineering construction. The traveling mechanism of traditional hydraulic excavators is crawler-type or wheel-type, and most of them work under normal road conditions. When performing railway maintenance, they are usually pulled by tractors to a designated lo...
Claims
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Inventor 吴文海朱涛李超孙磊
Owner SOUTHWEST JIAOTONG UNIV