SU880356A1 - Gripping-cutting device of tree-felling machine - Google Patents

Description

The invention relates to gripping and cutting devices of forestry machines and can be used in the forest industry.

Known gripping-cutting devices of forest machines, including a body mounted on an arrow, on which a hydraulically controlled gripper, a saw unit, an elastic element and a device for bending the trunk and directed tree felling £ 1] and [2] are installed.

However, in these devices, the elastic element does not exclude the complete elimination of the peak dynamic loads at the boom at the time of the tree tumble.

The purpose of the invention is the reduction of dynamic loads on the boom.

This goal is achieved in that the boom is connected to the housing by means of a hinged parallelogram, the opposite links of which are connected by an elastic element, such as a spring, and one link of the hinged parallelogram is mounted on the end of the boom and connected to it by means of a hydraulic cylinder.

The drawing shows the proposed device, General view.

The gripping-cutting device of the logging machine includes a housing 2 mounted on the boom 1, on which the saw apparatus 3 is mounted, a hydro-irrigated gripper 4 and a device for bending the trunk and directional tree felling, made in the form of a V-shaped lever 5. The boom 1 is connected to the housing 2 of the gripping-cutting devices by means of a hinged parallelogram 6, consisting of links 7, between which an elastic element is installed in the form of a spring 8, The housing 2 of the gripping-cutting device can be rotated vertically th plane relative to the boom using the hydraulic cylinder 9.

The proposed device operates as follows.

The arrow 1 with the body 2 mounted on it is aimed at the tree to be cut. Then the gripper 4 is turned on, while the V-shaped lever 5, pivotally mounted in the housing ί, turning around the hinge by clamping the gripper 4, tightens the tree from the side of the saw apparatus 3, after which the tree is cut and felled. The resulting dynamic dynamic loads are no longer transmitted, as in the known device, through the communication node of the boom and the device body (in the known elastic element performs its functions only when it is in contact with the housing lever), but is compensated by the elastic element in the form of a spring 8 ' installed between the links 7 of the hinged parallelogram. The hinged parallelogram eliminates the effect of peak dynamic loads on the boom as. in vertical and horizontal plane.

The technical and economic efficiency of the present invention consists in increasing the efficiency of protecting the manipulator boom from peak dynamic loads at the time of a tree felling.

Claims (2)

The invention relates to gripping shearing devices for forest machines and can be used in the forest industry. Known gripping-cutting devices for logging machines include a housing mounted on the boom, on which a hydro-controlled gripper, a sawing apparatus, a resilient element and a device for bending the trunk and directional wood felling l and, 2. However, in these devices, the elastic element does not exclude the complete elimination of peak dynamic loads on the boom at the moment of felling the tree. The purpose of the invention is to reduce the dynamic loads on the boom. The goal is achieved by the fact that the boom is connected to the body by means of a hinged parallelogram whose opposite links are connected by an elastic element, for example a spring, with one link of the hinge parallelogram installed at the end of the boom and connected to it by means of a hydraulic cylinder. The drawing shows the proposed device, a General view. The cutting and cutting device of the logging machine includes a housing 2 mounted on the boom 1, on which the sawing device 3 is mounted, a hydraulically controlled gripper 4 and a device for bending the trunk and directed rolls of wood made in the form of a V-shaped arm 5. The arrow 1 is connected to the housing 2 gripping device by means of a hinged parallelographic 6, consisting of links 7, between which an elastic element in the form of a spring 8 is installed, the body 2 of the gripping-cutting device has the ability to rotate in vertical noy plane relative to the boom by means of hydraulic cylinders 9. The device operates as follows. 38 An arrow with a housing 2 hung on it is pointing at the tree to be cut. Then, gripper 4 is turned on, while the V-shaped lever 5, pivotally mounted in the housing 1, turning around the hinge by pressing the gripper 4, produces tension on the tree from the side of the saw apparatus 3, after switching on which the tree is cut and fell. The resulting dynamic peak loads are no longer transmitted as in the known device through the junction of the boom and the device body (in a well-known elastic element performs its functions only when it comes into contact with the lever of the body), and is compensated by an elastic element in the form of a spring 8 installed between links 7 of the hinge parallelogram. The articulated parallelogram eliminates the effects of peak dynamic loads on the boom in both vertical and horizontal planes. The technical efficiency of the invention consists in increasing the protection efficiency of the boom arm from the peak dynamic loads at the moment of tree felling. Claims of the harvesting machine of a logging machine, including a housing mounted on the boom, on which a hydraulically controlled gripper, a sawing apparatus and a device for bending the trunk and directed tree rolls are installed, in order to reduce the dynamic loads on the boom it is connected to the body by means of a hinged parallelogram, the opposite links of which are connected by an elastic element, for example a spring, with one link of the hinged parallelogram being mounted on tse boom and connected to it by means of a hydraulic cylinder. Sources of information taken into account in the examination 1. The author's certificate of the USSR 620247, cl. A 01 G 23/08, 1977. 2, USSR Copyright Certificate No. 625660, Cl, A 01 G 23/08, 1977.