SI22668A

SI22668A - Driving device for unrolling of rope on a forestry winch

Info

Publication number: SI22668A
Application number: SI200700337A
Authority: SI
Inventors: Drago Pintar; AleĹˇ Marko
Original assignee: Uniforest, D.O.O.
Priority date: 2007-12-21
Filing date: 2007-12-21
Publication date: 2009-06-30

Abstract

The driving device for unrolling the rope on a forestry winch from the drum with the rope located between the driven and freely rotating rope pulley and at least one driven or freely rotating driving disk according to the invention is characterised in that the contact surfaces of both the rope pulley (8) and the driving disk (9) with rope (4) are covered with materials which upon adequate rigidity provide a friction factor which is far higher than the one of the basic material of the rope pulley (8) or driving disk (9).

Description

Pogonska naprava za odvijanje vrvi na gozdarskem vitluDrive rope unwinding device on a forestry winch

Predmet izuma je pogonska naprava za odvijanje vrvi, ki bo vlekla vrv z bobna gozdarskega vitla in zmanjšala napor vlečenja vrvi, ki jo gozdarski delavec opravlja od vitla do hlodovine.The subject of the invention is a propulsion device for unwinding a rope that will pull the rope from the drum of the forestry winch and reduce the effort of pulling the rope that the forestry worker performs from the winch to the log.

Natančneje gre za rešitev problema zmanjšanega pritiska na vrv med vlečno vrvenico in potisnim kolutom predvsem pri vrvi iz polietilenski in drugih vlaken, ki so občutljive na strižne sile in poškodbe zaradi njih.Specifically, this is a solution to the problem of reduced pressure on the rope between the tow rope and the thrust reel, especially for ropes made of polyethylene and other fibers, which are sensitive to shear forces and damage due to them.

Rešitev opisana v DE 202005020694 obravnava gozdarski vitel z bobnom na katerem je navita vrv, ki poteka z bobna preko zgornje vrvenice in naprej do hlodovine.The solution described in DE 202005020694 deals with a forestry winch with a drum on which a rope is wound, extending from the drum via the top rope and forward to the log.

Na vrv na zgornji vrvenici potiska najmanj en kolut, vrvenica je gnana neposredno s hidravličnim motorjem. Pritisk koluta ustvariti silo trenja med vrvjo ter kontaktno površino vrvenice, da vrteča gnana zgornja vrvenica vleče vrv z bobna. Pritisk na vrv deformira vrv oziroma slabo vpliva na strukturo pletenih žic vrvi in zmanjšuje njeno življenjsko dobo.At least one reel is thrust onto the top rope, the rope is driven directly by a hydraulic motor. Press the reel to create a friction force between the rope and the contact surface of the rope so that the rotating driven upper rope pulls the rope from the drum. The pressure on the rope deforms the rope or badly affects the structure of the braided wire ropes and reduces its life span.

Za zmanjšanje pritiska na vrv, to je posebno pomembno pri vrvi iz polietilenski in drugih vlaken, je rešitev opisana v SI 200700315 in SI 20070316. Vlek vrvi izvajajo vrteča gnana vrvenica in vrteči gnani potisni koluti.In order to reduce the pressure on the rope, which is especially important for ropes made of polyethylene and other fibers, the solution is described in SI 200700315 and SI 20070316. The rope pull is performed by rotating driven rope and rotary driven thrust reels.

Zaradi velikih obremenitev je izbran za vrvenico kakor potisni kolut kovinski material. Ti materiali imajo torni količnik pri gibanju zelo majhen.Due to high loads, it is selected as a thrust reel of metallic material. These materials have a very low friction coefficient in motion.

Po izumu je rešitev problema ustvariti silo trenja med vrvjo ter kontaktno površino vrvenice in najmanj eno zgornjo vrvenico s povečanjem tornega količnika pri zmanjšanem pritisku koluta.According to the invention, the solution of the problem is to create a friction force between the rope and the contact surface of the rope and at least one upper rope by increasing the friction coefficient under reduced pressure of the reel.

Izum bo opisan na izvedbenem primeru in sliki, ki prikazujeThe invention will be described in the embodiment and in the drawing

Sl. 1 Gozdarsko vitlo s pogonsko napravo za izvlek vrviFIG. 1 Forestry winch with rope puller

S1.2 Pogonska naprava za odvijanje vrviS1.2 Rope unwinding drive

Na sliki 1 je prikazano gozdarsko vitlo z ogrodjem 2 in na bobnu 3 navito vrv 4, ki poteka od bobna 3 skozi pogonsko napravo za odvijanje vrvi 1 do hlodovine v smeri H. Pogonska naprava za odvijanje vrvi 1 je vrtljiva v ogrodju 2 okoli simetrale 6.Figure 1 shows a forestry winch with a frame 2 and a rope 4 wound on the drum 3 extending from the drum 3 through the rope drive device 1 to the log in direction H. The rope drive device 1 is rotatable in frame 2 around the center 6 .

Na sliki 2 je prikazana pogonska naprava za odvijanje vrvi 1. Vrv 4 teče v vrvenici 8 nanjo nalega potisni kolut 9. Stična točka je na simetrali središčnic 7 simetral vrvenice 8 in potisnega koluta 9. Silo potiska potisnega koluta 9 na vrv 4 in vrvenico 8 izvaja napenjalni element 10 na en od poznanih načinov. Kontaktne površine vrvenice 8 kakor potisnega koluta 9 z vrvjo 4 so obložene z materiali, ki imajo ob zadostni trdnosti torni koeficient mnogo večji kot osnovni material vrvenice 8 ali potisni kolut 9. Izbrana obloga je lahko guma, sintetični materiali in drugo.Figure 2 shows the propulsion device for unwinding rope 1. The rope 4 flows into the rope 8 and pushes the reel 9. The intersection point is at the center line 7 of the rotor of the rope 8 and the thrust reel 9. The thrust force of the thrust reel 9 on the rope 4 and the rope 8 performs the tensioning element 10 in one of the known ways. The contact surfaces of the rope 8 as the thrust reel 9 with the rope 4 are lined with materials having a sufficiently strong friction coefficient much greater than the base material of the thrust 8 or thrust reel 9. The selected coating may be rubber, synthetic materials and more.

Za odvijanje vrvi 4 pri gnani vrvenici 8, potisnim kolutu 9 ali obeh hkrati se glede na torni količnik obloge in potrebne vlečne sile nastavi sila potisnega koluta 9 na vrv in vrvenico 8To loosen rope 4 at driven rope 8, thrust reel 9, or both, the force of thrust reel 9 on rope and rope 8 is set according to the friction coefficient of the lining and the required tractive forces.

Legenda pozicijPosition legend

1 1 Pogonska naprava za odvijanje vrvi Drive rope unwinding device 2 2 Ogrodje Framework 3 3 Boben The drum 4 4 Vrv Rope H H Smer do hlodovine Direction to the log 6 6 Simetrala vrtišča The center of rotation 7 7 Simetrala središčnic The center line symmetry 8 8 Vrvenica Twine 9 9 Potisni kolut Push the reel 10 10 Napenjalni element Tension element

Claims

1. A rope retractor on a forestry winch with a rope positioned between a driven or free-rotating rope and at least one driven or freely rotating thrust reel, characterized in that the contact surfaces of the rope (8) are like a thrust reel (9) with a rope (4) lined with materials which, with sufficient strength, have a friction coefficient much larger than the base material of the twine (8) or the thrust reel (9).

Drive rope retractor on a forestry winch according to claim 1, characterized in that rubber, synthetic material or other material is coated on the contact surfaces of the rope (8) as a thrust reel (9) with rope (4).