SU716538A1 - Gripping and cutting apparatus - Google Patents

Description

(54) CAPTIVE-CUTTING DEVICE

I

The invention relates to gripping and shearing devices for logging machines and can be used on feller bunchers and feller skidders in the forest industry.

Known gripping devices for cutting and knitting trees mounted on the manipulators of a forest machine and containing a cutting body (chain saw), felling device (lever, pusher), gripping lever designed to hold the tree in the process of cutting and knocking and for transferring and stacking wood in a pack, the cutting organ of the gripping devices being located above the gripping lever 1.

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The disadvantage of the gripping-cutting devices is that they are fixed on the tree stump. Therefore, after the thin trees fall to the ground, additional time is required for releasing the gripping-cutting device from the mon, re-laying the gripping-cutting device onto the lying tree and gripping this tree for transferring and laying it in a pack.

as a result, machine productivity is reduced.

Also known gripping devices mounted on the manipulator of a logging machine and containing a gripping lever, a cutting body located below the gripping lever, a felling device and a hydraulic actuator 2.

The disadvantage of these gripping devices is the retention of the butt part of each tree (regardless of its size and volume) during the cutting process and hitting the gripping arms. When cutting and knocking down large trees, all the shock loads from the falling tree are transmitted both to the gripping and cutting device, and to the manipulator and felling machine, as a result of which the number of breakdowns increases and the efficiency of the machine operation decreases dramatically.

Claims (3)

The use of the method of releasing a large tree from the gripping arms in the process of its fall does not always give a positive result, and its implementation requires a great deal of stress in the work and presents a certain danger to the operator of the feller, as to ensure the directional fall of the large tree of the absence of support tree with a stump or machine), around which he made his felling, it is very difficult). In addition to these gripping shears, a gripping shear mounted on the manipulator of a feller skidding machine and containing a gripping lever, two shearing bodies (one chain type and the other in the form of a power cutting knife located in the opening of the U-shaped device) is also known. ), separated in height and located below the gripping lever, the felling device and the hydraulic actuator 3. In this device, the power cutting knife is designed to cut thin trees to shorten the execution time these operations. The chain saw is designed to cut larger trees. Moreover, all the trees (small, large and larger) in the process of their cutting and rolls are held behind the butt by the gripping lever of this device. The purpose of the invention is to improve the efficiency of the device when felling and packing trees of different diameters. This is achieved by the fact that one of the cutting organs is located below, and the other is higher than the gripping lever. FIG. 1 shows the proposed device, side view; in fig. 2 - the same, top view. j,:,.;,,.:. ,: ,,:: „. The gripping-cutting device is mounted on the manipulator 1 and contains a gripping lever 2, cutting-off bodies of the upper 3 and lower 4 felling device 5 and a hydraulic drive, which includes hydraulic motors 6 and hydraulic cylinders 7, 8, and 9. The device works as follows. Depending on the diameter of the cutting tree, the operator, after pointing the cutting device to the tree and clamping the tree between the clamping levers 2 and the felling device 5, cuts the tree with one of the cutting bodies. Trees with a large diameter are cut by the top cut 3, while during the swaths the gripping cutter remains attached to the stump, and the tree is rolled by the felling device 5. The impact load from the falling tree is not transmitted to the manipulator 1 of the harvester. After the felling of a large tree, the operator releases the gripping-cutting device from Mon and puts the tree in a pack. The time spent on turning the butt part of a cut tree in a gripping and cutting device for stacking it in a pack pays off by reducing the shock loads on the machine, increasing its reliability and, consequently, increasing productivity. The cutting of small-sized trees is carried out by the lower cutting body 4, and the fallen tree remains clamped in the gripping-cutting device, which reduces the time of the working cycle. Claims pickup device mounted on the manipulator of a logging machine and containing a gripping lever, two cutting bodies spaced apart along the height, a felling device and a hydraulic actuator, one in order to increase the efficiency of the device when rolling and packaging trees of different diameters of the cutting organs is located lower, and the other higher is j; 4ara. Sources of information taken into account in the examination 1.A - USSR certificate № 26 11, cl. A 01 G 23/08, 1967., 2. USSR author's certificate number 414979, cl. A 01 G 23/08, 1972. 3. USSR author's certificate number 496993, cl. And OI.G 23/08, 1974 (prototype). R