SU742348A1

SU742348A1 - Load-engaging device

Info

Publication number: SU742348A1
Application number: SU782667674A
Authority: SU
Inventors: Петр Дмитриевич Хромов; Владимир Дмитриевич Тимофеев; Семен Григорьевич Волчек; Эдуард Оттович Сахаров
Original assignee: Предприятие П/Я А-7255
Priority date: 1978-09-29
Filing date: 1978-09-29
Publication date: 1980-06-25

Description

Изобретение относится к грузозахватным устройствам, предназначенным в частности для перегрузки крупногабаритных грузов с одновременным их взвешиванием.The invention relates to load handling devices, in particular for the handling of bulky goods with simultaneous weighing thereof.

Известно грузозахватное устройство, содержащее корпус с грузозахватным орга- 5 ном и установленный на корпусе посредством отклоняющего блока тензодатчик [1].A load gripping device is known comprising a housing with a load gripping organ 5 and mounted on the housing by means of a deflecting unit, a load cell [1].

Однако в этом устройстве на точность показаний тензодатчика существенное влияние оказывает трение между отклоняющим блоком и канатом. ¹⁰ However, in this device, the accuracy of the strain gauge readings is significantly affected by friction between the deflecting block and the rope. ¹⁰

Наиболее близким техническим решением к изобретению относится грузозахватное устройство, содержащее несущую раму с закрепленной на не$ грузовой подвеской, установленные на раме посредством верти- ,5 кальных осей грузозахватные органы и взвешивающее приспособление с тензодатчиком [2]. ·The closest technical solution to the invention relates to a load gripping device comprising a supporting frame fixed to a non-load suspension, load gripping bodies mounted on the frame using vertical 5 axis and a weighing device with a load cell [2]. ·

Недостатками этого устройства является невысокая точность взвешивания из-за влияния угла наклона канатов подвески, а так- ²⁰же сложность конструкции взвешивающего приспособления из-за наличия сферических опор для.крепления датчика.The disadvantages of this device is the low weighing precision due to the influence of the angle of inclination of the suspension ropes ²⁰ and tak the complexity of the design of the weighing device due to the presence of spherical bearings dlya.krepleniya sensor.

Цель изобретения — упрощение конструкции устройства и повышение точности взвешивания.The purpose of the invention is to simplify the design of the device and improve the accuracy of weighing.

Поставленная цель достигается тем, что тензодатчик установлен на каждой оси грузозахватного органа и закреплен на ней посредством гайки и стакана, в котором выполнено гнездо для размещения несущей части тензодатчика и установлен стопор для его фиксации, причем на раме закреплены втулки, в каждой из которых размещен верхний конец оси грузозахватного органа.This goal is achieved by the fact that the load cell is mounted on each axis of the load-gripping body and secured to it by means of a nut and a cup, in which a socket is made to accommodate the load-bearing part of the load cell and a stopper is installed to fix it, and bushings are fixed on the frame, in each of which the upper the end of the axis of the lifting body.

На фиг. 1 изображено предлагаемое устройство, общий вид; на фиг. 2 — разрез А—А на фиг. 1.In FIG. 1 shows the proposed device, a General view; in FIG. 2 — section A — A in FIG. 1.

Грузозахватное устройство содержит траверсу 1 с блоками 2, огибаемыми канатами 3, подсоединенными к барабану лебедки (на чертежах не'показаны). К траверсе 1 присоединена несущая рама 4.The load gripping device comprises a crosshead 1 with blocks 2, enveloped by ropes 3 connected to the winch drum (not shown in the drawings). A support frame 4 is attached to the traverse 1.

На раме 4 установлены грузозахватные органы 5, закрепленные посредством осей 6. На оси 6 каждого грузозахватного района 5 смонтирован тензодатчик 7, который нижней частью размещен в гнезде, выполненном в стакане 8. Для предотвращения тензодатчи ка от поворота и смещения относительно вертикальной оси в стакане предусмотрены стопорные элементы 9, которые своим коническим концом фиксируют датчик в стакане, исключая тем самым влияние трения на его показания. К стакану 8 тензодатчик ⁵прижимается гайкой 10.On the frame 4, load-gripping bodies 5 are mounted, fixed by means of axles 6. On the axis 6 of each load-gripping region 5, a load cell 7 is mounted, which is placed with the bottom in a socket made in the cup 8. To prevent the strain gauge from turning and shifting relative to the vertical axis, the cup is provided locking elements 9, which with their conical end fix the sensor in a glass, thereby excluding the effect of friction on its readings. The strain gauge ^{5 is} pressed against the glass 8 by the nut 10.

Верхний конец оси 6 расположен в направляющей втулке 11, закрепленной на металлоконструкции рамы 4 и предохраняющей тензодатчик от перекоса при действии ударных нагрузок.The upper end of the axis 6 is located in the guide sleeve 11, mounted on the metal structure of the frame 4 and protecting the strain gauge from skew under the action of shock loads.

Грузозахватное устройство работает следующим образом.The lifting device operates as follows.

При захвате груза, например контейнера (на чертежах на показан), грузозахватные органы 5 входят в фитинги контейнера и и поворачиваются. После этого происходит подъем контейнера, а датчик 7 фиксирует вес поднимаемого груза.When capturing a cargo, such as a container (shown in the drawings), the load gripping bodies 5 enter the container fittings and rotate. After that, the container rises, and the sensor 7 detects the weight of the load being lifted.

Предлагаемое крепление тензодатчика предохраняет его от ударов и исключает в значительной степени влияние трения на по- ¹⁰казания веса транспортируемого груза.The proposed fastening of the load cell protects it from impacts and largely excludes the effect of friction on the ¹⁰ indications of the weight of the transported cargo.

При захвате контейнера возможны удары грузозахватных органов о контейнер из-за непопадания их в фитинги контейнера. Однако эти удары передаются стаканом 8 ц на металлоконструкцию рамы 4, предохраняя тензодатчики.When the container is grabbed, it is possible that the load-gripping bodies may hit the container due to not falling into the container fittings. However, these impacts are transmitted by a glass of 8 centigrade to the metal structure of the frame 4, protecting the load cells.

Claims

The invention relates to lifting devices, in particular for handling large loads with simultaneous weighing. A load gripping device is known, comprising a body with a load gripping body and a strain gauge 1 mounted on the hull by means of a deflecting unit. However, in this device the accuracy of the strain gauge is significantly affected by the friction between the deflecting unit and the cable. The closest technical solution to the invention relates to a load gripping device comprising a carrier frame with a cargo suspension mounted on it, mounted on the frame through vertical axes of a load gripping device and a pushing device with a strain gauge 2. The disadvantages of this device are the low precision of angling due to the effect of inclination suspension ropes, as well as the design complexity of the bushing device due to the presence of spherical supports for fastening the sensor. The purpose of the invention is to simplify the design of the device and improve the accuracy of weighing. The goal is achieved by the fact that the strain gauge is mounted on each axis of the load gripping body and fixed to it by means of a nut and a glass, in which there is a slot for accommodating the load-bearing part of the strain gauge and a stopper is installed for fixing it, and the sleeves are mounted on the frame. the end of the axis of the lifting body. FIG. 1 shows the proposed device, a general view; in fig. 2 shows section A-A in FIG. I. Lifting device contains the yoke 1 with blocks 2, enveloping the ropes 3 connected to the winch drum (not shown). Carrier frame 4 is attached to traverse 1. Load-gripping bodies 5 are mounted on frame 4 fixed by means of axles 6. A load cell 7 is mounted on the axis 6 of each load-bearing area 5, which bottom part is placed in a slot made in glass 8. To prevent the load cell from turning and offset relative to the vertical axis in the glass, locking elements 9 are provided, which with their conical end fix the sensor in the glass, thereby eliminating the influence of friction on its readings. A strain gauge is pressed against the glass 8 by a nut 10. The upper end of the axis 6 is located in the guide sleeve 11 fixed on the metal structures of the frame 4 and protecting the strain gauge from skewing under the action of shock loads. Load handling device operates as follows. When a load is captured, for example, a container (shown in the drawings as pas), the load gripping bodies 5 enter the container fit and turn. After this, the container is lifted, and the sensor 7 records the weight of the lifted load. The proposed attachment of the strain gauge protects it from impacts and eliminates to a large extent the effect of friction on the weight of the transported load. When the container is seized, it is possible for the load-gripping organs to hit the container due to their non-entry into the container fittings. However, these impacts are transmitted by the cup 8 to the metal structure of the frame 4, which protects the load cells. Claims of load-lifting device comprising a carrier frame with a cargo suspension fixed on it, mounted on the frame by vertical axes of load gripping bodies and weighing device with a strain gauge, characterized in that in order to simplify the design and improve the accuracy of weighing, the strain gauge is mounted on each axis of the load gripping body and fixed to it by means of a nut and a cup, in which a socket is made to accommodate the lower part of the strain gauge and a stopper is installed to fix it, moreover, the frame is fixed to the sleeve, each of which is located the upper end of the axis of the lifting body. Sources of information taken into account during the examination 1. USSR author's certificate No. 507220, cl. 66 C 13/06, 1976.

2. USSR author's certificate number 438604, cl. In 66 C 17/00, 1974 (prototype).