SU1532533A1 - Telescopic boom - Google Patents

Abstract

The invention relates to the building materials industry, but can be used in crane construction. The purpose of the invention is to expand the functionality by providing two-sided extension of the sections. The telescopic boom consists of a supporting 1 and sliding 2 to 5 sections, of which section 2 is driven, 6–9 clips and blocks 10–17. When the driving section 2 is in motion with moving the cage 8 away from the fixed 6, the length of the rope between them is increased due to the reduction of the distance between the blocks 10 - 17, which are closer to each other, mounted on the opposite ends of the sliding sections 2 - 4, i.e. between the yoke 8 and the block 10, between the blocks 11 and 12, between the block 13 and the attachment point A _{1 of} the end of the rope. At the same time, in another polyspathic system kinematically counter-symmetric to the first, the length of the rope between the fixed yoke 7 and the moving yoke 9 is reduced, as the yoke 9 moves in the direction of the arrow B to the yoke 7. The released rope is rolling through the blocks 10, 12, 15 and 17, moves to the blocks 11, 13, 14 and 16 mounted at the ends of the sliding sections 2-5 to compensate for the increasing distance between the yoke 9 and the block 14, between the blocks 15 and 16, between the block 17 and point B _{1 of} the end of the rope attachment. When the drive section 2 moves in the opposite direction to the starting position, the length of the rope between the sleeves 6 and 8, as well as the sleeves 7 and 9, changes in the reverse order, and when the starting position is reached, both lengths of the rope become equal to each other, and between the units installed at opposite ends of adjacent sliding sections 2-5 are the same. 4 il.

Description

We 8 from the fixed ring 6, the length of the rope between them is increased by reducing the distance between each other with blocks 10-17, mounted on opposite ends of the sliding sections 2-4, i.e. between the yoke 8 and the block 10, between the blocks 11 and 12, between the block 13 and the point A. of attachment of the end of the rope. At the same time, in another polyspathic system, which is kinellically counter-symmetric to the first, the length of the rope between the fixed yoke 7 and the moving yoke 9 is reduced, as the yoke 9 moves in the direction of the arrow B to approach the yoke 7, the released rope, rolling over blocks 10, 12, 15 and 17,

moves to blocks 11, 13, 14 and 16 mounted at the ends of the sliding sections 2-5 to compensate for the increasing distance between the yoke 9 and the block 14, between blocks 15 and 16, between the block 17 and point B, attaching the end of the rope. When the driving section 2 communicates the movement in reverse

the direction to the starting position of the cable between the sleeves 6 and 8, as well as the sleeves 7 and 9, changes in the reverse order, and when the starting position is reached, both cable lengths become equal to each other, and the distances between the blocks, mounted on opposite-ends of adjacent drawer sections 2-5 are the same 4 or about

The invention relates to the industry of building materials, but can be used in crane building and mechanical engineering when creating manipulators and robots with a large radius of action, as well as in construction and mining.

The purpose of the invention is to expand the functionality by providing two-sided extension of sections,

FIG. I depicts a telescopic device, axonometrics; FIG. 2 is a scheme for storing ropes through blocks, axonometrics; on fig.Z - the same, top view; in fig. 4 - the same, in one of the working positions „

The device consists of a support section 1 mounted on a movable or stationary base, sliding sections 2-5, of which section 2 is a drive, i.e. associated with a drive mechanism of any type (hydraulic cylinder, rail and drive gear, chain drive, cable drum, etc.) and two counter symmetric polyspast systems, each of which includes a flexible element, such as a steel cable, non-eaves, and 6 and 7 block holders, movable 8 and 9 block holders, and blocks 10,11 , 12.13 and 14,15,16,17, mounted on the ends of the following s and the drive retractable sections. Flexible element, two ends of which are fixed respectively on a fixed wallpaper

five

0

five

0

five

0

five

less than 6 at point A and on the head section 5 at point A, covering the blocks of the movable casing 8 and the fixed casing 6, and then the blocks 10,11, 12,13, mounted on the ends of sections 3 and 4, following the drive section 2, forms the left polispast system (located to the left of the head section 5) "

Similarly, another flexible evil. the cop, the two ends of which are fixed respectively on the fixed holder 7 at point B and on the head pull-out section at point B, encompass the blocks of the movable holder 9 and the fixed holder 7, as well as the blocks 14,15,16,17 mounted on opposite ends of the same following the drive section of the sliding sections 3 and 4, form a right counter-symmetrical left ispatching system.

 .

The device works as follows.

When the drive section 2 is in motion in the direction of arrow B (see FIG. 4) from the initial position with moving the movable sleeve 8 from the fixed sleeve 6 when the rope rolls in blocks 10-17, the length of the rope between them increases due to the reduction of the distances between each other. with other blocks 10-17, mounted on opposite ends of the sliding sections 2,3,4, i.e. between the yoke 8 and the block 10, between the blocks 11 and 12, between the block 13 and the attachment point A of the end of the rope.

At the same time, in the other polyspast system, which is opposite to the symmetric one, the length of the rope between the fixed yoke 7 and the moving yoke 9 decreases accordingly, since the moving yoke 9 moves in the direction of the arrow B in approaching the fixed yoke 7 In doing so, the released rope, rolling over blocks 10,12, 15 and 17, moves to blocks 11, 13, 14 and 16 mounted on the ends of the retractable sections 2,3,4 to compensate for the increasing distance between the yoke 9 and block 14 between blocks 15 and 16, between block 17 and Point B fastening the end of the rope.

When the drive section 2 moves in the opposite direction to the starting position, the length of the rope between the sleeves 6 and 8, as well as the sleeves 7 and 9, changes in the reverse order, and when the starting position is reached, both lengths become equal. neither between the blocks 10 17, installed at the opposite ends of the adjacent detachable sections 2,3,4, are the same (see FIG. 3)

When the drive section 2 moves in the direction of the arrow G from the initial position, the order of work remains the same, however, the rope length between the holders 6 and 8 of the left polyspast system decreases with the distance of the drive section from the initial position, and the right one increases.

To ensure the maximum possible outreach of each slide section 2, 3, 4, the condition of equality of the useful length of the rope between the cages 6 and 8, 7 and 9 of the length of the rope stored between blocks 10-17 at the ends of the sliding sections 2,3 , 4, This relationship, with equal distances between the sleeves 6 and 8, 7 and 9, to the maximum departure of each section 2, can be expressed in terms of the multiplicity of the chain hoop or the number of branches between the sleeves 6, 8, 7 and 9 in relation to the number of sliding sections 2,3,4 5 as follows:

0

five

0

where K - the number of branches polyspast-; between the clips 6 and 8, 7 and 9 (the multiplicity of the hoist hoist);

p - the number of sliding sections 2,3,4,5,

The telescopic device can be mounted on mobile and stationary objects with a swinging, swiveling, and non-rotatable support base. When installed, for example, on transfer axles that move along rail tracks, they can serve production areas on both sides of the path, unlike the existing ones, with a radius of action that exceeds the size of bridges by almost n times (meaning a useful maximum departure of each section, where n - the number of sliding sections, the appointed outcome based on the permissible dimensions of the device and the desired 5 vteta),

Claims (1)

Formula invented Telescopic boom, containing basic supporting and sliding sections, one of which is made driving, and tackles for raising and folding sections with ropes, with one ends fixed on the head pull-out section, and the other fixed on the ends of the sliding sections characterized in that, in order to extend the functionality by providing two-sided extension of the sections, it is equipped with cumulative tackles for synchronizing the extension of the sections formed by Lancers with blocks installed on the supporting and driving sections and bending by these ropes, with the ends of one of the ropes and the enveloping blocks around them, are fixed at one ends of the corresponding sections, and the ends of the other and around the blocks envelope at the other ends, with this cumulative tackles made 0 are not multiplicities determined by the formula , where K is the multiplicity of cumulative polyspast; p - the number of sliding sections. Fi.by 14 Fig.Ch