摘要:
In a device and a method for a tree harvester head for trimming tree trunks, the device includes a frame (1) supporting feed rollers (2), one or more trimming knives (4) that pivot towards and away from the tree trunk, as well as a trimming knife (6) permanently fixed to the frame (1) and with a radius of curvature that is essentially equivalent to the radii of curvature of the pivoting trimming knives (4). A complementary trimming knife (7) is arranged in a displaceable manner at the frame and affected by a force of spring tension (9) in a direction towards the tree trunk that is to be worked, whereby the complementary trimming knife (7) has an area of grip around the tree trunk that is significantly less than the area of grip of the pivoting trimming knives (4) or the fixed trimming knife (6) when working the butt end of the trunk, and an area of grip around the tree trunk that is greater than the area of grip of the pivoting trimming knives (4) or the fixed trimming knife (6) when working the top end of the trunk for trimming the trunk from its butt end to its top end.
摘要:
A method for cutting trees (18) in the vicinity of a power line (10) using a topping saw (17) suspended from a helicopter (15) in such a way that the helicopter is flown in the direction of the power line (10) so close to the electricity wires (12) that the topping saw suspended from the helicopter cuts the desired tops of the trees. The cutting line (14) of the topping saw (17) is determined in such a way that the helicopter is flown with the help of a video camera (21) attached to the suspension bar (16) for the topping saw at an angle of 45° and a monitor (22) placed in connection with the helicopter's cockpit so that the video camera is kept directed towards the electricity wire (12) of the power line (10). The distance (a, b) of the point where trees are to be cut from the electricity wire (12) is determined by adjusting the distance (h) of the video camera from the cutting blade (20) of the topping saw (17). The topping saw (17) comprises two cutting blades (20) that rotate horizontally and in the same direction and a motor (28) that rotates the cutting blades.
摘要:
An improved self-aligning tree delimbing apparatus for use in conjunction with a knuckle boom loader having an inner frame member pivotally mounted and concentrically received within an outer frame member, which is rigidly attached to a base member. Pivotally mounted within the inner frame member is a tree delimbing cutter head assembly having opposing pairs of tree guide arms and tree delimbing arms pivotally mounted thereon, thereby allowing for simultaneous multi-dimensional pivotal motion of the cutter head assembly within the frame members. Such motion allows the cutter head assembly to easily align with the longitudinal axis of the trees being delimbed, thereby increasing the efficiency of the apparatus while reducing the binding stresses and necessary force applied by the knuckle boom loader.
摘要:
The invention relates to a delimbing apparatus for processing elongated pieces, particular tree trunks (S), which apparatus (1) comprises a frame structure (2) to be suspended at the end of a boom assembly in a working machine, at least one means, articulated in relation to said frame structure, for processing the trunk (S), and actuators (31a, 31c, 51a, 51b) for controlling the position and force effect (F) of said means. In the invention, said actuators comprise at least one joint (100) driven by a pressurized medium and comprising a joint frame (101), a joint arm (103) swivelled in said joint frame, and a blade structure (105, 106) fitted in said joint, by means of which blade structure the pressure effect of the pressurized medium produces said swivelling.
摘要:
Apparatus (10) having special application for gripping and cutting tree limbs around utility lines includes a tubular insert (18) slideably received in the free end of a tubular boom (12). A plate (28) is pivoted about a first pivot axis relative to the insert (18) by a linearly extendable actuator (36) mounted within the insert (18) and mounts a first rotary actuator (38). A second rotary actuator (58) is mounted to a U-shaped mount (48) which is pivoted about a second pivot axis to the first rotary actuator (38) and rotates a working head (96) 360° about a third pivot axis. Gripping arms (78) are fixed to shafts (74) rotatably mounted in the working head (96) about axes perpendicular to the third axis, with the shafts (74) being rotated by a single linearly extendable actuator (82) extending between crank arms (80) fixed to the shafts (74). The crank arms (80) abut with an abutment (84) to prevent only one set of gripping arms (78) from moving. An untethered remote control unit (112) is provided to prevent the creation of an electrical path to ground through the operator. A solar and battery-powered transmitter (144) mounted on the head (96) sends an electromagnetic signal to prevent actuation of the valves (101-103) controlling the operation of the boom assembly (14) when the saw bar (88) is not in its home position.
摘要:
A first tree engaging device is attached to the first trimming member and maintains the first trimming member at a transverse position relative to the tree trunk during relative longitudinal movement of the tree trunk. The first trimming member includes a knife portion which includes a knife edge portion structured and arranged to form an angle (&phgr;) relative to the tree trunk surface when placed adjacent to the tree trunk.
摘要:
A head for a tree delimbing machine having a boom. The head combines a topping knife assembly with a butting saw assembly and a gripping arms assembly in a single unit. The improved head simplifies not only the delimbing operation but also the topping and butting operations as well. The head combines all three operations into one device and can be retrofitted on to existing boom-type delimbing machines.
摘要:
A circular saw head for use as a boom mounted head attachment is disclosed for agricultural trimming. The blades can cut as much as four inches of material. An adjustable head piece is provided that is also reversible allowing for exposure of more or less of the blades. Safety aprons are provided to deflect cut material away from the operator.
摘要:
A delimbing device includes a cutting head assembly having (i) a cutting blade configured to cut branches off of a tree and (ii) a bar saw configured to cut through the tree. The device also includes a first support member supporting the cutting head assembly. The device further includes a second support member supporting the cutting head assembly. The device also includes a bearing assembly secured to the first support member and the second support member so that (i) the bearing assembly is interposed between the first support member and the second support member and (ii) the cutting head assembly can rotate relative to the second support member around an axis of rotation such that when a rotational force is applied to the cutting head assembly the cutting head assembly rotates from a first orientation to a second orientation. The bearing assembly is configured so that when the rotational force is removed from the cutting head assembly the cutting head assembly spontaneously returns to the first orientation from the second orientation.
摘要:
A felled tree delimbing system which is skid mounted, having; a steel, horizontal chute with vertical cutting bars at one end where an overhead locking and cutting arm cooperates with the cutting bars. The operator engages the device by placing a bundle of cut trees horizontally on the chute, the tree's weight forcing down a trigger, causing the counter-weighted cutting arm to close over the trees forcing them into rectangular openings formed thereby. The bundle of trees is in the grasp of a logger's knuckle boom crane or similar piece of equipment at the lower portion of the tree trunks. The trees are then pulled along the chute through the edged rectangles, thus shearing off and removing limbs and branches from the upper part of the tree trunks. Upon removal of delimbed trunks from the chute, the unweighted trigger is released, allowing the cutting arm to return to an open position through action of pulleys and a counter weight.