RU34155U1 - Rope block - Google Patents

Description

The utility model relates to hoisting-and-transport mechanisms and can be used in guiding devices for the rope of rope systems of the timber industry complex.

Known cast rope blocks of hoisting mechanisms containing a rim with a groove and a hub connected by oval cross-section spokes / 1 /, which allow to increase the strength and stiffness of the block, improve castability, the oval cross-section of each spoke is large in size perpendicular to the block plane. In such blocks, the rope and the block quickly wear out at the points of contact (contact) of the rope with the groove due to the occurrence of contact stresses.

Known cable block / 2 / containing mounted on the bearing unit roller with a groove equipped with a corrugated support insert containing a spring element with a corrugated surface having the shape of strands of rope, which allows to reduce (reduce) contact stress between the rope and the supporting surface. The disadvantage of this design is the complexity of the manufacture and fastening of the corrugated support insert. In addition, this design does not allow "to track changes in the position of the rope due to fluctuations and variability of the angle of deviation, which also adversely affect the life of the rope.

Known cable block / 3 /, different from / 2 / in that the groove of the block is made of transverse grooves, and on the corrugated insert is elastic compensators in the form of U-shaped protrusions placed in the transverse grooves of the groove of the block. This allows the inserts to respond to changes in the pitch of the rope lay and partially move in the transverse grooves of the rim

IPC B66D 3/08 Rope block

The utility model solves the problem of increasing the service life of a steel rope by reducing contact stresses during the interaction of the rope surface with the roller groove and “tracking the lateral deviations of the rope at a deviation angle of 1 to 3.

This is achieved by the fact that in the rope block, containing; we have a roller with a groove mounted on an axis, according to a utility model, the roller is made of modified wood sectors (DM), forming; their disk having an end face arrangement of fibers on the surfaces of contact with the sleeve and the rope , sandwiched between two metal disks and mounted on a saddle-shaped surface of a metal sleeve, consisting of two half-sleeves, the left of which is tightly mounted on the axis, and the right has a sliding fit, and the outer diameter of the roller in D a groove depth (l, 2 -: - l, 5) -J. and radius (0.52-bO, 53) -, where d is the diameter

the rope.

The use of a sliding bearing in this design allows the roller to deviate to the left and right, if there is a gap of 2-3 mm between the roller and the bearing, depending on the angle of deviation of the rope within 1-3.

Allowable load on the block up to 100 kN (10 tf).

The manufacture of a combined roller reduces the metal consumption for the manufacture of the device through the use of DM.

The block structure is shown in FIG. 1 is a general view and FIG. 2 - section along aa.

The rope unit 1 consists of a combined roller 2 and axis 3. The roller is made of DM sectors 4 forming a disk and two metal disks 5 (each 10 mm thick) that clamp the DM sectors from two sides using bolts 6 with nuts 7. For the reliability of the disk coupler, a special washer 8 is installed, which compensates for the change in the DM swelling pressure in the pressing direction, i.e. compensates for the relaxation of internal stresses that occur in the wood over time under the influence of changing temperature and humidity conditions of operation of the roller body, and also fixes the nuts 7 and prevents their turning.

On the axis 3 there are two metal half-sleeves (left 9 and right 10) with side protrusions. The left half-sleeve is pressed onto the axle with a large interference fit (tight fit) until it stops 11. The right half of the sleeve 10 is fitted onto the axis with a significantly lower interference fit (sliding fit), which is installed after the roller is mounted on the floor of the sleeve 9. The half of the sleeve is made of steel 3. Thus Thus obtained sleeve, consisting of two half-sleeves 9 and 10, is firmly clamped on the axis by nut 12. The outer surface of two half-sleeves has the form of a saddle and is a supporting surface for the wooden part of the roller. To ensure constant pressure on the half-sleeve and fixing the nut 12, a special roving washer 8 is installed under it, the purpose of which is given above.

The rope unit operates as follows.

The rope stocked through the unit contacts its strands with a DM disk having a lower modulus of elasticity in comparison with the rope wires, which allows its strands to develop a “bed” in it and, thus, increase the contact area. This leads to a decrease in contact stresses and, consequently, to an increase in the service life of the steel rope.

Sources of information

1. The author's certificate of the USSR No. 468873. Cl. B66d 3/08, 05/05/73. Bull. .

2. The author's certificate of the USSR No. 988757. Cl. B66D 3/08, 06/05/81. Bull. No. 2.

Claims (1)

A rope unit comprising a roller with a chute mounted on an axis, characterized in that the roller is made of modified wood sectors, forming a disk having an end face arrangement of fibers on the surfaces of contact with the sleeve and the rope, sandwiched between two metal disks and mounted with support on the saddle the surface of the metal sleeve, consisting of two half-sleeves, the left of which is tightly mounted on the axis, and the right has a sliding fit, and the outer diameter of the roller in the wood modified and the groove depth (1,2-1,5) d _{to the} radius (0,52-0,53) d _k, where d _k - the rope diameter.