SU808264A2

SU808264A2 - Portable power saw

Info

Publication number: SU808264A2
Application number: SU772500699A
Authority: SU
Inventors: Эрнст Александрович Келлер
Original assignee: Пермский политехнический институт
Priority date: 1977-06-27
Filing date: 1977-06-27
Publication date: 1981-02-28

Description

(54) ПЕРЕНОСНАЯ МОТОРНАЯ ПИЛА(54) PORTABLE MOTOR SAW

1one

Изобретение относитс к переносным мотопилам и может быть использовано в лесной промышленности.This invention relates to portable chainsaws and can be used in the forest industry.

По основному авт. св. 616128 известна переносна моторна пила , включающа двигатель, пильный аппарат, полую стойку, внутри которой установлен гаситель колебаний , выполненный в виде стержн , верхний конец которого снабжен грузом, а нижний св зан с основанием стойки шарниром, ось которого перпендикул рна оси пильного аппарата , бензобак и руко тки управлени , жестко соединенные в опорну раму, св занную со стойкой при помощи упругих элементов fl.According to the main author. St. 616128 known portable motor saw, including a motor, a saw apparatus, a hollow stand, inside which is mounted a vibration damper, made in the form of a rod, the upper end of which is equipped with a weight, and the lower end is connected with the stand base by a hinge, the axis of which is perpendicular to the axis of the saw apparatus, the gas tank and control handles rigidly connected to a support frame associated with the stand by means of elastic elements fl.

Однако известна пила не обеспечивает необходимого снижени уровн вибрации руко ток управлени в горизонтальной плоскости. Одной из причин вл етс неуравновашейность гармоник опрокидывающего момента , действующего относительно оси коленчатого вала двигател , котоЕ ле привод т к увеличению амплитуд колебаний на входе в амортизаторы в плоскости, перпендикул рной оси пильного аппарата.However, the known saw does not provide the necessary reduction in the level of vibration of the control knobs in the horizontal plane. One of the reasons is the imbalance of the harmonics of the tilting moment acting relative to the axis of the engine crankshaft, which leads to an increase in the amplitudes of oscillations at the entrance to the shock absorbers in a plane perpendicular to the axis of the saw apparatus.

Цель изобретени - снижение уровн вибраций руко ток управлени .The purpose of the invention is to reduce the level of vibrations of the control knob.

Поставленна цель достигаетс тем, что нижний конец стержн св зан с основанием стойки через дополнительный шарнир, ось которого параллельна оси пильного аппарата.The goal is achieved by the fact that the lower end of the rod is connected to the base of the stand through an additional hinge, the axis of which is parallel to the axis of the saw apparatus.

На фиг. 1 изображена переносна моторна пила, общий вид; на фиг. 2вид А на фиг. 1.,FIG. 1 shows a portable motor-saw, general view; in fig. 2 type A in FIG. one.,

Claims

The portable motor saw contains a motor 1 with rigidly connected sawing apparatus 2 and a hollow stand 3. The gas tank 4 and control handles 5 are rigidly connected to the support frame 6. The support frame 6 is connected to the stand 3 by elastic elements 7 in the form of cylindrical equal-springs arranged evenly along a circle whose center coincides with the center of the tin of frame-6. Inside the rack 3 there is a shock vibrating carrier in the form of a rod 8, the upper end of which is provided with a load 9, and the lower end is connected to the base of the rack 3 through two hinges, the axes of which are perpendicular to each other, i.e. Hooke's hinge 10, one of the axes of which is made parallel to the axis of the crankshaft of the engine and the sawing apparatus oy. At the same time, the second axis of the crosspiece of the hinge aa is perpendicular to the axis of the ow. The upper end of the rack 3 is provided with a threaded hollow plug 11, and the surfaces facing the friend to each other: the plug 11 and the load 9 are made conical. The external part of the load is made of resilient material 12. The clearance between the load 9 and the stopper 11 is adjusted by means of the gaskets 13. The saw is operated by the CJJDU in the same way. Engine 1 generates spatial oscillations transmitted through the rack 3 and the elastic elements 7 to the frame 6. When the upper end of the rack 3 moves in the direction of the axles oh, oh the load 9 due to the presence of the Hook 10 hinge, it oscillates in the opposite direction with the rack 3 along these directions peri9 1ce 1 (and strikes the internal surface of the plug 11, the scattering dissipation, the vibrational energy of the strut and reducing the amplitude of oscillations at the entrance to the elastic elements in the horizontal plane, which significantly reduces the level of vibration of the handles in the horizontal Turning the stopper 11 relative to the pillar 3, increase (decrease) the gap between the load and the stopper, adjusting the damper to the optimum mode. Performing the outer part of the load from elastic material 12 leads to additional dissipation of the oscillation energy to internal friction and improves vibration damping Claim of the invention Portable motor saw according to aut. St. No. 616128, characterized in that, in order to reduce the level of vibrations of the control handle, the lower end of the rod is connected to the base of the stand through an additional Yelnia hinge whose axis is parallel to the axis of the saw unit. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 616128, cl. B 27 B 17/00, 1976.

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