SU650810A1 - Device for cutting off twigs from felled trees - Google Patents

Description

The invention relates to equipment for the forest and woodworking industry, in particular, to a device for cutting branches from fallen trees.

Devices for cutting branches from felled trees are known, including a frame on which the iodachi mechanism of trees is mounted, swiveled by means of a drive, pressure arms, carrying pressure rollers and curvilinear power cutting knives. Forming a closed cutting contour, and hydraulic clamping levers, providing simultaneous pressing to the trunk of the processed tree, clamping rollers and delimbing knives 1.

Such devices have the disadvantage that a special mechanism is required for tree feeding, which significantly complicates the design, increases energy consumption and reduces the reliability of the device as a whole.

The closest in technical essence to the invention is a device for pruning knots from fallen trees, including a frame, swivel hold-down levers with fastened on them

vertical shafts with traction wheels, lower and side two shoulders, spring-loaded arms with curved delimbing knives fixed on them, forming a closed cutting contour, and hydraulic drive 2.

However, this device has an increased complexity of the design due to the need to use an additional drive for the drive wheels, is unreliable in operation and inefficient due to the presence of additional mechanisms and their drives.

The purpose of the invention is to simplify the design and increase the efficiency of the device.

The goal is achieved by the fact that the side two shoulders with delimbing knives are hinged on the shafts of the traction wheels of the clamping levers and the guide copiers of the triangular profile are attached to their free ends, and on the 0 presser levers there are rollers that interact with the guide guides of the corresponding double levers. and in the lower part of the clamping levers are fixed perpendicular to their longitudinal

axes are inclined guide planes in contact with. carrying delimbing knife. lower two shoulders lever.

FIG. 1 schematically shows a device for cutting branches from fallen trees, top view; in fig. 2 - the same, front view; in fig. 3 shows section A-A in FIG. one; in fig. 4 - node I of FIG. one; in fig. 5 - node II, FIG. 3

To the support frame 1 of the welded structure of the device, two clamping levers 2 are pivotally attached to them via vertical shafts 3 tread wheels 4, rotated through gears 5 from hydraulic motors 6. On one shaft 3 with torsion wheels 4 there are levers 7 with side wheels delimbing knives 8. The levers 7 are connected with fingers 9 to the sleeves 10, which are freely mounted on shafts 3. Thanks to this connection, the levers 7 with delimbing knives 8 can be rotated both horizontally and vertically OST In the initial position, the levers 7 are held by means of the springs 11. The clamping levers 2 with the traction wheels 4 are interconnected by a power hydraulic cylinder 12, which ensures their synchronous operation when the traction wheels 4 are pressed or pressed from the tree trunk. At the ends of the clamping levers 2, there are stops 13, which fix their position in the opened state. At the free ends of the levers 7, guiding copiers 14 are triangular in shape, interacting with rollers 15 mounted on the upper plane of the clamping levers 2. The lever 16 of the lower delimbing knife 8 is pivotally attached to the frame 1 and has the ability to vertically alternate when interacting with the guideline by strips 17, one ends rigidly attached to the ends of the clamping levers, perpendicular to their longitudinal axis. The upper edge of the guide bars 17 is inclined at an angle a. Restricters 18 are attached to port 16, which, at their upper ends, interact with the levers 7 of the lateral delimbing knives 8, ensuring their quick opening at the moment of occupying the levers 7 with the initial position.

The device works as follows.

The tree is placed on the top by the butt part — into the device and lies on the lower delimbing knife 8 and on the end part of the frame 1. The power hydraulic cylinder is 12 tons, the wheels 4 begin to press against the tree trunk. The side delimbing knives 8 first touch the tree trunk, as a result of which the lever 7 begins to turn on the shaft 3 relative to the pressure lever 2, and the guide copier 14 interacts with the roller 15 so that it presses the lateral delimbing knives 8 at an angle of 120 ° relative to each other . At the same time, the angle of inclination of the guide copier (i is selected accordingly, based on the specified conditions.

At the same time, the lower lever 16 with the delimbing knife 8, interacting with the guide bars 17, is also pressed against the tree trunk. A closed cutting contour is formed, which constantly contacts along the generator with the tree trunk.

After the branches are cut from the tree by the hydraulic cylinder 12, the clamping levers 2 are retracted and the drive wheels 4 with delimbing knives 8 return to their original position.

Subsequently, the process is repeated.

Thus, the device possesses increased operational qualities, since all its mechanisms are controlled from one hydraulic drive, which, in turn, facilitates the control of the device and increases its efficiency.

Claims (2)

1. Author's certificate No. 481429, cl. In 27 G 1/00, 1974. 2. US patent number 3690351, cl. 144-2, 1972.