SU1687752A1 - Jib part for cutting slots in ground - Google Patents

Abstract

The invention relates to bar mechanisms for cutting gaps in the ground with the excitation of vibrating low-frequency vibrations at the working tool. The purpose of the invention is to increase the performance and reliability and the expansion of technological capabilities. A single-track drive shaft (B) 2 is fixed on the frame 1 in bearings, which is connected by a connecting rod 3 and an eccentric fit of the pinion gear to the driven B 5, which has an asterisk 6 and an arrow (C) 7 with a tensioning device and a driven asterisk 8 A sprocket 9 passes through the sprockets 6 and 8 and B 2 is mounted on B 2, which is mounted in rails 11 on frame 1 for longitudinal movement of C 7. Hydraulic cylinder 12 is installed between frame 1 and bar 10 B 2 through operation from B 2 and gear 4 transmits rotational and translational Vision on C 7 and 6 and the sprocket 8 and the chain 9. The amplitude of the longitudinal movement of the C 7 equal to double the eccentricity 2. The feed rate depends on the rotational speed V 2. 1 yl. €

Description

The invention relates to bar mechanisms for cutting gaps in the ground with the excitation of vibrating low-frequency vibrations at the working tool.

The purpose of the invention is to increase productivity and reliability and expand technological capabilities.

The drawing shows a diagram of the bar working body.

In bearings of the fixed frame 1, a single-track drive shaft 2 is installed, which is connected by a connecting rod 3 and a mechanical gear 4 with an eccentric fit of the pinion gear to the driven shaft 5, on which the driving sprocket 6 and the boom 7 are attached, equipped with a tensioning device and carrying a follower in its lower part sprocket 8. Sprockets 6 and 8 and the side parts of the boom (cheeks) 7 are covered by a cutting bar chain 9. On frame 1 coaxially With shaft 2 a bar 10 is installed, the spider has 11 guides for longitudinal

the boom 7 is moved along it. The frame 1 and the rod 10 are pivotally connected by a lift hydraulic cylinder 12.

The proposed device works barely blowing the way.

From the drive shaft 2 (connected in turn with the engine), the movement to the driven shaft 5 is transmitted due to the combined influence of the connecting rod 3 and the gear train 4. Since the drive gear of this gear is fixed on the shaft 2 with the same eccentricity (in magnitude and direction), as on the crankshaft, these two kinematic lines work in sync. At the same time, the connecting rod 3 ensures a constant gearing of the gears of the transmission 4, keeping the distance between the centers of their curvature. At the same time, the distance between the centers of rotation of the wheels of the transmission 4 will change all the time and the driven 5 will move relative to the drive shaft 2. The movement of the driven shaft 5 will be PolO5

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SP

to

To determine the movement of the boom 7 relative to the rod 10. Since the guides 11 allow only the longitudinal movement of the boom 7 relative to the rod 10, and the latter is set coaxially with the drive shaft 2, the driven shaft 5 together with the boom 7 will also move strictly longitudinally relative to the rod 10. Amplitude displacement (longitudinal vibration) will be equal to the double eccentricity of the shaft 2. Instead of a gear transmission, a chain transmission can also be used, but with an eccentric fit of the drive sprocket. The frequency of this vibration will be equal to the number of revolutions of the drive shaft 2. With the longitudinal vibration of the boom 7 and the rotation of the drive sprocket 6, the cutting speed of the soil will be determined by their sum: V et-Vu ± ± VB, where Vu is the linear speed of the circuit, m / s,

which will be constant, lnn D

 3

(n - the number of revolutions of the asterisk 6 per minute, - its radius, m); UV - the speed of vibration of the boom 7, together with the asterisks 6 and 8 and the bar cutting chain 9, it varies in size from zero to Uhtah

 -vjpf- /, where n is the number of revolutions per minute oi

drive shaft 2, / - the value of the selected shaft eccentricity 2, m. so that the cutting all the time was dynamic, but in one direction, inequality must be fulfilled. At modern speeds of movement of the barovy chain U. 1.25 2.5 m / s, the achievement of this inequality is quite ensured. Due to the longitudinal vibrations of the stre

At 7, causing a variable cutting speed Vp ', the soil will at all times be subjected to dynamic loads, more effective for its destruction than at const. At the same time, the working body, regardless of the chosen value of eccentricity, will not detach from the soil and produce periodic rocking, causing increased loads from its weight on the ground and drive.

Claims (1)

Invention Formula 0 B A bar tool for cutting gaps in the ground including a frame and driven and driving sprockets attached to it, a boom with tensioning mechanism, driven and driven shafts with cranks, connecting rods, suspension and control hydraulic cylinder, characterized in that, in order to increase productivity and reliability and expansion of technological capabilities, the drive shaft is made of one crankshaft, and the suspension is equipped with a rod mounted on the frame coaxially with the drive shaft and can be rotated in a vertical plane, while The shaft with the drive sprocket and boom is mounted with the possibility of longitudinal movement along the rod and connected to the drive shaft by means of a gear with an eccentrically mounted drive gear and a connecting rod, the eccentricities of the driving gear and crankshaft being equal and unidirectionally, while the rod is pivotally connected with control cylinder and movably with boom.