SU1632931A1 - Winch - Google Patents

Description

(21) 4659391/11

(22) 06.03,89

(46) 03/07/91. Bul Number 9

(71) Kalininsky Experimental Mechanical Plant

(72) A.A. Golovnin, A.A.Golovnin, V.V. Rodionov, M.N.Safronov, Yu.I.Tyurin and V.A.Petrov

(53) 621.864 (088.8)

(56) USSR Author's Certificate No. 829549, cl. In 66 D 1/26, 1979.

(54) WINCH

(57) The invention relates to lifting devices, namely winches with several drums. The purpose of the invention is to reduce the size and weight of the winch. The winch includes a housing 3, two friction drums 1 with Y-shaped grooves in which the rope is located, a drive shaft 13, rollers mounted on them for rotation, an additional drive A-A shaft 14, kinematically connected with

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13. The drive shafts 13 and 14 are located concisely to the drums, the grooves are made through, and the rollers are eccentrically mounted on the drive shafts 13 and 14. The rope may be stockpiled on the drums S-shaped. Due to the tension, the rope fits snugly to the surface of the grooves of the parts of the drums, with the exception of areas where

The invention relates to lifting devices, namely to winches with several drums.

The purpose of the invention is to reduce the size and weight of the winch.

FIG. 1 shows a winch, a longitudinal section; on fig 2 - section aa on fig „1 about

The winch contains two two-part 1 and 2 friction cylindrical drums arranged in the same plane. One drum part 1 is rigidly connected to the winch body 3, the other part 2 can be made on the wall of case 3. In parts 1 and 2 of the drum inclined surfaces 4 opposite to each other are formed, forming among themselves continuous Y-shaped grooves 5 in which rope 6 is placed. In plan, inclined surfaces 4 are made on arcs of circumferences of drums, limited on each drum by point 7

touching the common inner tangent 8 to both reels, conducted along the axis of the tight-fitting groove 5 of the rope 6, and point 9 touching the outer tangent 10, conducted along the axis of the rope 6, directed along the outer surface 11 of the other drum. The rope 6 is located in the grooves 5 with the formation of the S-shaped coverage of the drums. Inside the drums size

The puffers mounted on their axis in the bearing assemblies 12 are drive shafts — primary 13 and an additional 14 with rollers 15 mounted on them eccentrically with the possibility of rotation in bearing supports. The drive shafts 13 and 14 are interconnected kinematically by means of two identical gear wheels which engage.

rollers, where a shear wave is formed from a rope. When the drive shafts rotate, the rollers move

sections of a rope with a transverse wave, along the grooves, as a result of which the rope moves. The force of friction of the rope against the surface of the grooves keeps it from sliding both when rotating and when the drive shafts are stationary. 1 hp ff, 2 ill.

five

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16, which gives a gear ratio of one. The width of the rollers 15 is less than the width of the grooves 5 and they enter the grooves 5 in contact with the rope 6.

The mutual position of the rollers 15 placed in different drums in the initial position of the winch is characterized by the possibility of such an angular position of the drive shafts 13 and 14, in which the axes of the rollers 15 are located on perpendiculars 17, lowered from the axes of the drive shafts 13 and 14 on a common tangent 8 to both drums, which is the axis of the rope 6 in the area between the drums.

The winch works as follows.

Due to the tension of the working and idling winch branches with a useful and tension load (not shown), the rope 6 fits snugly to the surface of the grooves 5 of the reels, except for the sections opposite to which the rollers 15 are located, where a transverse wave is formed from the rope 6.

The rollers 15 deflect the rope 6 towards the outer surface of the drums and it loses contact with the drum 4 at the contact areas with the rollers 15. At the same time, its length at the stretch from the drums is greater than at equal parts of the drums along the arc, at which the rope 6 fits him tightly. During rotation of the drive shafts 13 and 14, the rollers 15 move the sections of the rope 6 with the transverse wave along the groove 5, as a result of which the rope 6 moves along the groove 5 of the drum with a speed

V ul z-n (m / min), where D1 is the excess of the length of the rope 6 at the site of its departure from

the drum and the formation of a transverse wave over its length on an equal in arc section in which the rope 6 fits the drum tightly; z is the number of rollers 15; n - the number of revolutions of the drive

shafts 13 and 14, min. The force of friction of the rope 6 against the surface of the grooves 5 of the reels keeps the rope 6 from sliding both when rotating and at stationary driving shafts 13 and 14.

Claims (2)

1. A winch containing a drive shaft mounted in a housing and 0 five two friction cylindrical drums, each of which has a V-shaped annular groove 4 with a rope located in it, having a load and idle branches and consistently covering both drums, and rollers mounted for rotation and in contact with the rope and located in V-grooves, characterized in that, in order to reduce the size and weight of the winch, it is equipped with an additional drive shaft, kinematically connected with the main one, while the drive shafts are located concentric to the drums, which rigidly connected to the housing, with the grooves made through, and the rollers eccentrically mounted on the drive shafts. 2. Winch according to claim 1, characterized in that the rope is stocked on the drums S-shaped with the possibility of positioning the axes of the rollers on the perpendiculars lowered from the axes of the drive shafts on the axis of the rope between the drums.