摘要:
For mining work the apparatus has a main frame (10) with heavy side walls (12) and (14) joined by transverse braces (18) to form a box-like configuration. The frame (10) is carried on endless tracks and acts as a counterweight to the forces developed at the excavating buckets (74). These are carried on a boom (36) swingable about vertical pivot (24) and horizontal pivot (80) by rams (48) and (50). The buckets (74) have hinge pins 68 whose enlarged ends engage sprockets (58) and (60) for supporting and driving the bucket chain. The buckets have replaceable excavating teeth (not shown).
摘要:
The present invention relates to the field of excavations or loadings, and in particular, to a method for arranging rolling-friction stretching and retraction based rolling stroke sections of a rocker arm in parallel, and an excavator or loader comprising a rocker arm having rolling stroke sections arranged in parallel. The excavator or loader comprises a rocker arm, a machine body, and a work head, wherein the rocker arm comprises a front roller, a rear roller, a front roller raceway, a rear roller raceway, a telescopic arm, a telescopic support arm, and the like; the front roller raceway and the rear roller raceway are arranged in parallel; the front roller rolls within the front roller raceway; the rear roller rolls within the rear roller raceway; the front roller coordinates with the rear roller to support the telescopic arm to perform the rolling-friction stretching and retraction on the telescopic support arm by means of rolling friction; the work head is connected with the telescopic arm which drives the work head to stretch or retract; and the telescopic support arm is connected with the machine body.
摘要:
The present invention relates to the field of excavations or loadings, and in particular, to a method for arranging rolling-friction stretching and retraction based rolling stroke sections of a rocker arm in parallel, and an excavator or loader comprising a rocker arm having rolling stroke sections arranged in parallel. The excavator or loader comprises a rocker arm, a machine body, and a work head, wherein the rocker arm comprises a front roller, a rear roller, a front roller raceway, a rear roller raceway, a telescopic arm, a telescopic support arm, and the like; the front roller raceway and the rear roller raceway are arranged in parallel; the front roller rolls within the front roller raceway; the rear roller rolls within the rear roller raceway; the front roller coordinates with the rear roller to support the telescopic arm to perform the rolling-friction stretching and retraction on the telescopic support arm by means of rolling friction; the work head is connected with the telescopic arm which drives the work head to stretch or retract; and the telescopic support arm is connected with the machine body.
摘要:
A mining machine, in the form of a ranging drum shearer has a ranging arm 11 pivotally mounted on at least one end of the body 10, of the shearer. The arm 11 carries a cutter drum and an associated transversely mounted electric motor 12 which drives the cutter drum of said arm. The electric motor is contained withln a transversely disposed cylindrical shroud 20 mounted on or integral with the ranging arm 11 and spaced longitudinally of the axis of rotation 14 of the ranging arm 11. The machine runs in both directions on a track 16 which has a conveyor 16A which runs in one direction. Therefore, when the machine is running in the direction opposite to that of the conveyor a coal sizer 18 and an associated transversely mounted electric motor 19 are spaced in advance of the leading end face of the body. The coal sizer 18 is carried by a mounting 23 which is pivotally connected to the body 10 on the ranging arm hinge 14 and has a two-part sleeve 24A, 24B which locates around the shroud 20 and is rotatable relative to the shroud. When the ranging arm 11 pivots up or down, the shroud also pivots but the coal sizer 18 is restrained to remain in a pre-set stationary position so that it can break large lumps of cut coal to a size which enables the lumps to pass along the conveyor 16A under the machine body 10. The coal sizer 18 is restrained from pivoting with the shroud by a position-control arm 30 which is pivotal on the machine body and extends longitudinally alongside the coal sizer. The control arm 30 can be pivoted by a hydraulic ram 33 to locate it in the pre-set position. The arm 30 has a keyway 31 into which locates a key 32 coaxial with the coal sizer. The key 32 pivots and slides along the keyway as the ranging arm pivots and the sleeve 24 rotates about the shroud 20 so that a distance 'L' between the axis of the coal sizer and the shroud remains constant. When the control arm 30 is pivoted to its lowermost position, the drum drive motor 12 can be removed, unobstructed, from the shroud 20.
摘要:
La présente invention concerne une haveuse comportant un châssis (2), un moto-réducteur (20), un tambour d'abattage (4) décalé latéralement par rapport au châssis (2) de la haveuse et supporté à une extrémité d'un bras (3) articulé par son autre extrémité à une extrémité du moto-réducteur (20), ce bras (3) étant actionné par un vérin (21). Le bras (3) relié au moto-réducteur (20) et supportant le tambour (4) se prolonge latéralement par rapport au châssis (2) dans une direction d'avance de l'abattage, la direction du bras étant modifiable à l'aide du vérin de manière à permettre différentes hauteurs d'abattage sans que pratiquement le bras ne dépasse à l'arrière du châssis lors de l'abattage.
摘要:
Excavating buckets (74) with teeth (76) are joined by hinge pins (68) which connect interdigititated hinge parts (70) and (72) on adjacent buckets to form a piano hinge. The pins (68) have enlarged ends for engagement with the teeth of driving sprockets (60) driven by hydraulic motors (80, 82), through shaft (30). The ends of the pins (68) roll on the sprockets, thus reducing wear, and the conequent rotation of the pins in the hinges equalizes wear and maintains roundness.