SU927734A1

SU927734A1 - Crane safety arrangement

Info

Publication number: SU927734A1
Application number: SU802899591A
Authority: SU
Inventors: Иван Алексеевич Торопов; Станислав Иванович Демидов; Геннадий Исаакович Гудис; Василий Егорович Ионов
Original assignee: Челябинский Механический Завод Им.60-Летия Октября
Priority date: 1980-03-26
Filing date: 1980-03-26
Publication date: 1982-05-15

Description

Изобретение относится к подъемно-транспортному машиностроению, а именно к предохранительным устройствам стреловых кранов, и может быть использовано для ограничения бокового усилия на уравнительный блок механизма подъема.The invention relates to hoisting-and-transport mechanical engineering, in particular to safety devices for jib cranes, and can be used to limit lateral forces on the equalization block of the lifting mechanism.

Известно предохранительное устройство стрелового крана, содержащее выключатель, соединенный через упругие элементы с кронштейном, подвешенным к металлоконструкции крана, причем выключатель связан с грузовым канатом механизма подъема [1].A safety device of a jib crane is known, comprising a switch connected through elastic elements to a bracket suspended from a crane metal structure, the switch being connected to a hoisting rope of a hoisting mechanism [1].

Недостатком известного устройства является сравнительно низкая надежность, обусловленная раскачиванием кронштейна.A disadvantage of the known device is the relatively low reliability due to the swinging of the bracket.

Известно также предохранительное устройство крана, содержащее установленную на металлоконструкции крана продольную ось, на которой подвешен кронштейн для крепления в нем оси уравнительного блока механизма подъема, которая расположена перпендикулярно продольной оси, а также упругие элементы и выключатель, соединенный со схемой управления механизмом подъема (2].A crane safety device is also known, comprising a longitudinal axis mounted on the metal structure of the crane, on which a bracket is suspended for mounting therein the axis of the equalization block of the lifting mechanism, which is perpendicular to the longitudinal axis, as well as elastic elements and a switch connected to the lifting mechanism control circuit (2] .

Недостатком известного устройства при применении его на стреловом кране является сравнительно низкая надежность крана, обусловленная возможностью неограниченных по величине боковых усилий в уравнительном блоке его механизма подъема.A disadvantage of the known device when used on a jib crane is the relatively low reliability of the crane, due to the possibility of unlimited lateral forces in the equalization unit of its lifting mechanism.

Цель изобретения - повышение надежности стрелового крана путем ограничения боковой составляющей усилия в уравнительном блоке.The purpose of the invention is to increase the reliability of the jib crane by limiting the lateral component of the force in the surge block.

Указанная цель достигается тем, что устройство снабжено дополнительной осью, установленной перпендикулярно продольной оси, и обоймой с гнездами, продольные оси которых перпендикулярны одна другой, причем продольная и дополнительная оси состоят из полуосей, свободные концы которых установлены в гнездах обоймы, при этом кронштейн и дополнительная ось выполнены с опорными площадками, между которыми расположены упругие элементы и выключатели.This goal is achieved by the fact that the device is equipped with an additional axis mounted perpendicular to the longitudinal axis, and a holder with sockets, the longitudinal axis of which is perpendicular to each other, and the longitudinal and additional axes consist of half shafts, the free ends of which are installed in the socket of the holder, with the bracket and additional the axis is made with supporting platforms between which elastic elements and switches are located.

На фиг. 1 изображено предохранительное устройство, общий вид; на фиг. 2 — то же, вид спереди; на фиг. 3 - то же, вид сверху.In FIG. 1 shows a safety device, general view; in FIG. 2 - the same front view; in FIG. 3 - the same, top view.

Предохранительное устройство крана содержит продольную ось 1, на которой подвешен кронштейн 2, несущий ось 3 уравнительного блока 4 механизма подъема. На блоке 4 уложен грузовой канат 5. .Оси 3 и 1 взаимно перпендикулярны.' Дополнительная ось 6 закреплена на металлоконструкции 7 стрелы крана. Ось 6 и кронштейн 2 выполнены с опорными площадками 8 и 9, между которыми расположены соответственно упругие элементы 10 и выключатели 11. Оси 1 и 6 состоят из полуосей, свободные концы которых установлены в гнездах 12 обоймы 13. причем продольные оси 14 гнезд 12 перпендикулярны одна другой. Выключатели 11 связаны со схемой управления механизмом подъема (не показано).The safety device of the crane contains a longitudinal axis 1, on which a bracket 2 is suspended, supporting the axis 3 of the leveling block 4 of the lifting mechanism. A cargo cable 5 is laid on block 4. Axles 3 and 1 are mutually perpendicular. ' An additional axis 6 is fixed to the metal structure 7 of the crane jib. The axis 6 and the bracket 2 are made with supporting platforms 8 and 9, between which the elastic elements 10 and the switches 11 are located. The axes 1 and 6 consist of half shafts, the free ends of which are installed in the sockets 12 of the sleeve 13. the longitudinal axis 14 of the sockets 12 are perpendicular to one other. The switches 11 are associated with a control circuit of the lifting mechanism (not shown).

Предохранительное устройство крана работает следующим образом.The safety device of the crane operates as follows.

В исходном состоянии кронштейн 2 расположен вертикально, боковая составляющая усилия на блок 4 отсутствует. При работе крана металлоконструкция 7 стрелы может наклоняться, при этом обойма 13 поворачивает вместе с осью 6 под действием веса кронштейн 2 блока 4 и кронштейн снова занимает вертикальное положение. При возникновении боковой составляющей усилия на блоке 4 кронштейн 2 поворачивается относительно оси 1, при этом упругие элементы 10 противодействуют повороту кронштейна 2 и при заданном усилии срабатывает один из выключателей 11 (в зависимости от направления поворота кронштейна), при этом останавливается механизм подъема.In the initial state, the bracket 2 is located vertically, the lateral component of the force on the block 4 is absent. When the crane is operating, the boom metal structure 7 can be tilted, while the yoke 13 rotates together with the axis 6 under the influence of weight the bracket 2 of the block 4 and the bracket again takes up a vertical position. When a lateral component of the force occurs on the block 4, the bracket 2 rotates relative to the axis 1, while the elastic elements 10 counteract the rotation of the bracket 2 and, for a given force, one of the switches 11 is activated (depending on the direction of rotation of the bracket), while the lifting mechanism stops.

Предохранительное устройство позволяет ограничивать боковую составляющую усилия в уравнительном блоке механизма подъемаThe safety device allows you to limit the lateral component of the force in the equalization unit of the lifting mechanism

927734 . 4 крана, при этом при наклоне металлоконструкции стрелы кронштейн поворачивается и снова оказывается в вертикальном положении, благодаря чему повышается надежность крана.927734. 4 cranes, while tilting the metal structure of the boom, the bracket rotates and again appears in a vertical position, thereby increasing the reliability of the crane.

Claims

The invention relates to a lift-and-transport equipment, namely, safety devices for boom cranes and can be used to limit lateral force on the equalizing unit of the lifting mechanism. A safety device for a boom crane is known, which contains a switch connected through elastic elements to a bracket suspended from the crane metal structure, and the switch is connected to the hoist cable of the lifting mechanism 1. A disadvantage of the known device is the relatively low reliability caused by the swinging of the bracket. It is also known a crane safety device containing a longitudinal axis mounted on the crane metalwork, on which is suspended a bracket for fastening the axis of the equalizing block of the lifting mechanism, which is located perpendicular to the longitudinal axis, as well as elastic elements and an impedance connected to the control circuit. 2. A disadvantage of the known device when used on a jib crane is the relatively low reliability of the crane, due to the possibility of unlimited values e lateral forces in the equalization block of its lifting mechanism. The purpose of the invention is to increase the reliability of the boom crane by limiting the lateral component force in the equalizing unit. This goal is achieved by the fact that the device is equipped with an additional axis, installed perpendicularly to the longitudinal axis, and a yoke with sockets, the longitudinal axes of which are perpendicular to one another, with the longitudinal and additional axes consisting of semi-axes, the free ends of which are installed in the sockets of the yoke, while the bracket and the additional axis are provided with supporting platforms, between which elastic elements and switches are located. FIG. 1 shows a safety device, general view; in fig. 2 - the same, front view; in fig. 3 - the same, top view. The safety device of the crane contains a longitudinal axis 1, on which the bracket 2 is suspended, carrying the axis 3 of the equalizer unit 4 of the lift. At block 4, cargo rope 5 was laid. Axis 3 and 1 are mutually opposite to each other. The additional axis 6 is fixed on the metalwork 7 of the crane jib. The axis 6 and the bracket 2 are made with supporting platforms 8 and 9, between which resilient elements 10 and switches 11 are located, respectively. Axes 1 and 6 consist of semi-axes, the free arms of which are installed in slots 12 of the yoke 13. and the longitudinal axes 14 of the sockets 12 perpendicular to one another. Switch 11 is associated with a lifting mechanism control circuit (not shown). The safety device of the crane works as follows. In the initial state, the bracket 2 is vertically positioned, the lateral component of the force on unit 4 is absent. During the operation of the crane, the metalworking 7 boom can be tilted; in this case, the yoke 13 rotates together with the axis 6 under the action of the weight of the Kronontein 2 of the block 4 and the bracket again takes the vertical position. When a lateral component force occurs on block 4, bracket 2 rotates relative to axis 1, the elastic elements 10 counteract the rotation of bracket 2 and at a given effort one of switches P triggers (depending on the direction of rotation of the bracket), the lifting mechanism stops . Fuse (the piece device allows you to limit the lateral component of the equalizing block of the lifting mechanism. 4 wounds, while tilting the metal construction and the boom arm rotates and again turns upright, which increases the reliability of the crane. Claim of the invention crane metal construction longitudinal axis, on which is suspended a bracket for fastening in it an axis of the equalization block of the lifting mechanism, which is located perpendicular It is hornily longitudinal axis, as well as elastic elements and a switch connected to the control circuit of the lifting mechanism, characterized in that, to increase the reliability of the boom crane by limiting the lateral component force in the equalizing unit, it is equipped with an additional axis that is perpendicular to the longitudinal axis , and a holder with a socket, the longitudinal axes of which are perpendicular to one another, with the longitudinal and additional axes consisting of semi-axes, the free ends of which are installed in the slots of the yoke, with the bracket The y and the additional axis are made with supporting pads, between which resilient elements and switches are located. Sources of information taken into account in the examination 1. USSR author's certificate number 554202, cl. B 66 C 23/90, 11.07.75.

2. Limiters of carrying capacity of bridge, (out cranes. Overview of information VIIInformt Zhmash. M., 1974, pp. 28-29, fig. 11 (prototype),.