SU1326732A1 - Rope-chain saw drive - Google Patents

Abstract

The invention relates to the mining industry and reduces the energy intensity of the cutting process due to impulsive movement of the cutting. The actuator includes a housing, an electric motor, a feed mechanism and a reversal mechanism. The output shaft 20 of the reversing mechanism rotates from the engine through a gear system and a high-speed misaligned wave chain drive 27. The shaft 20 is fixed and driven by a three-star sprocket 28. The driving sprocket 29 is single-shaft and fixed on the shaft 30. It also has semi-axes 32 and 33 with vodnli 34 and 35 with paired rollers 36, forming a 37 wave generator chain wave transmission 27. The driving sprocket 29 rotates with an angular frequency less than the frequency of the wave generator 37. 4 il. 4 / А-А (Л 00 to О5 СО 1C (rig. 3

Description

The invention relates to the mining industry and can be used in drives of wire-chain saws.

The purpose of the invention is to reduce the energy intensity of the cutting process due to impulsive movement of the cutting.

FIG. I shows the drive with two saws, general view; in fig. 2 - drive circuit diagram; in fig. 3 - the scheme of the reversing cutting mechanism is unfolded; in fig. 4 - movement velocity diagrams.

The drive of chain-saws consists of a body 1, an electric motor 2, a feed mechanism 3, a reversing mechanism 4, two pair of ropes 5 and 6 and two flexible cutting members (saws) 7 and 8 (Fig. 1 and 2).

The feed mechanism comprises a hydraulic actuator 9, two pairs of cable drums 10 and 11 and a wave three-way transmission 12 for kinematically coupling the output shaft 13 of the hydraulic actuator 9 and the shaft 14 of the catholic drum 10 (11). Transmission 12 consists of a two-wagon stationary drive sprocket 15 placed between the rims of a multi-roll 16 wave generator mounted on a shaft 13, a driven three-crown sprocket 17 on a shaft 14, connected by a three-row stub roller chain 18.

The reversing mechanism 4 is made in the form of a gearbox 19 with the output shaft 20 and the carriers 21 to 22 fixed on it with working units 23 and 24. Paired equalizing units 25 and 26 are mounted on the drive housing 1 (Fig. 2).

The rotation of the output shaft 20 from the engine is transmitted through a gearing system and a high-speed pumping wave chain transmission 27, the knowledge of which three-star gear 28 is mounted on the same shaft (Fig. 3).

The drive sprocket 29 is made single-crowned and mounted on the shaft 30, kinematically connected to the engine shaft by 2 gears 31. On this shaft 30, semi-axes 32 and 33 are mounted with carriers 34 and 35 carrying paired rollers 36. Axes, drivers and rollers form 37 wave generator of a chain wave transmission 27. The rollers 36, the sprockets 29 and 28 are combined by a three-chain chain 38. The asterisk is conditionally fixed relative to the wave generator 37. The rollers 36 are installed with the possibility of interaction with the chain 38 during the rotation of the 37 wave generator.

The sequential gears 31 are connected by gear 39 to the transmission shaft 40, from which the shaft 30 and the drive sprocket 29 mounted on it by means of a set of gear wheels 41-42-43 are connected to the gear shaft 44. shaft 45, which

ten

15

20

25

The latter, by means of two identical sets of gears 46 and 47, transmit the rotation of the semi-axes 32 and 33 of the wave generators.

The proposed drive operates as follows.

From the hydraulic drive 9, the cable drums 10 and 11 receive rotation through a three-chain wave transmission 12, which by means of the traction ropes 5 and 6 report the feed movement to the saws 7 and 8 at a speed r7 (Fig. 1).

From the electric motor 2, through a series of gears 31 and a bristle 39, as well as a set of wheels 41-42-43, the shaft and drive sprocket 29 receive rotation with an angular frequency of Wn const. Together with the wheels 39 and 41, the transmission shaft 40 rotates, transmitting the rotation of the hollow shaft 45 through the coupling 44. The shaft 45 rotates the wave generator in the same direction as the sprocket 29, with the angular frequency w, and. The difference between these frequencies is the relative frequency of rotation of the wave generator w:

 WTri.

As a result, the angular frequency of rotation of the driven sprocket 28 of the chain drive 27 is determined by the sum

where

thirty

35

40

45

50

55

tAuf U3 "-f-lir",

,,, -. ) -t

1g8-ge

Where 1g «-г9 gear ratio

chain transfer 26 with a relatively fixed wave generator;

Ify gear ratio of chain transmission 27 with a relatively fixed sprocket 29 and rotation speed of the NL wave generator.

FIG. 4a shows graphs of the indicated rotational frequencies of the shaft 20 of the carrier 21 and 22 of the reversal of the pull ropes.

The angular frequency of rotation W corresponds to a sinusoidal diagram of the portable speed of the ropes (Fig. 46), as in the prototype.

Angle frequency - and; shaft 20 superimposes on diagram 1 (5kp harmonic of the pulsating motion of the wave chain transmission 27. In Fig. 4c, a summary diagram of the absolute cutting speed of the uJiavf pull ropes is shown. This diagram is a sawtooth, due to which the saw receives an impulsive movement with a cutting speed

Claims (1)

Invention Formula The drive of chain saws, comprising a housing, an electric motor, a feed mechanism containing a hydraulic drive, cable drums and a low-speed wave three-chain chain drive with a two-wedge drive sprocket and fixed wave generator, a reversing mechanism for cutting the movement in the form of a gearbox with output shaft and fixed on it vodilami, working and equalizing blocks, characterized in that, in order to reduce the intensity of the cutting process due to impulsivity, cutting, the gearbox output shaft is provided with a high-speed the driving wave three-chain chain drive, the driven sprocket of which is fixed on this shaft, is made of a single leading sprocket with the possibility of constant rotation with an angular frequency less than the frequency of the wave generator formed by two riders with semi-axes placed on the shaft on both sides of the leading sprocket associated with each other and with the engine toothed kinematic chain. eleven f 5 Phage.1 Up up sixteen 13 20 ± 25 but Veez X a) a (f % -K sri &.