RU2045467C1 - Load-lifting crane boom - Google Patents

Abstract

FIELD: materials handling facilities. SUBSTANCE: boom has hook hanger pulley block secured by means of quickly removable pin on bracket of extending section and operating from crane winch, and additional bracket with catchers-pilots on ends, bracket being secured on fixed section of boom. When telescoping the sections and when hook hanger is in extreme upper position, upper and lower sheaves of pulley block get into catchers-pilots and are thus get tied by pulley block cable and fixed on additional bracket. When pin holding extending section of pulley block upper sheave on bracket is pulled out, extending section gets released without dismounting of winch. EFFECT: enlarged operating capabilities. 5 dwg

Description

 The invention relates to hoisting-and-transport mechanical engineering, namely to jib cranes mounted on trucks.

 A boom of a crane is known, comprising a handle pivotally connected to telescopically sliding sections with the possibility of rotation of the latter by means of a power cylinder in a vertical plane, a bracket fixed to the end of the pull-out section and hook suspension mounted on it by means of a quick finger on a flexible body. The roller chain is used as a flexible organ in the boom, which, together with the hook suspension at the end, is either fastened to the arm of the sliding section with a quick-release finger, while the cargo operations are carried out by arrow maneuvers, or the roller chain freely hangs from the end of the non-extendable section, and the load is lifted and lowered moving the sliding section, which is not always possible in cramped conditions and makes it difficult to carry out cargo operations.

 The purpose of the invention is the expansion of the technical capabilities of the boom when operating the crane in cramped conditions, if necessary, use interchangeable attachments without dismantling the crane winch.

 For this purpose, the boom is equipped with a fixed upper block fixed to the bracket by means of a quick-detachable finger and a pair of movable lower blocks, which form, together with the flexible body enveloping them, working from the crane winch, a hook-and-hook pulley, and an additional bracket with catchers at the ends, fixed to the end of the sliding section with with the possibility of entering during telescopic folding of the sections and the extreme upper position of the hook suspension, in one of the catchers of the upper block, and in the other of the lower block of the pulley block of the hook odveski the vertical position of the additional bracket, the bracket drawer configured to fix on it after attachment to the upper connector block.

 In FIG. 1 shows an arrow with a chain hoist of a hook suspension in a working position; figure 2 is the same with telescopically sliding sections in a vertical position; figure 3 a fragment of figure 2, the pulley blocks included in the catchers of the additional bracket; figure 4 is the same, the arm of the retractable section after the connector with the upper pulley block; figure 5 section aa in figure 3.

 The boom of the crane consists of a handle 1 connected to the telescoping section 2 of the telescope by means of a hinge 3 and a power cylinder 4. At the end of the pull-out section 5, a bracket 6 is mounted with a hook suspension 7 on a flexible body 8. On the bracket 6, the upper block 10 is fixed by means of a finger 9, forming together with the paired movable lower block 11 and the envelope of their flexible body 8 of the chain hoist hook suspension, working from the winch (not shown) of the crane. At the end of the non-extendable section, an additional bracket 12 is fixed with catchers 13 and 14 intended for the upper and lower pulley blocks.

 The arrow of the crane operates as follows.

 When raising and lowering the load, the hook suspension 7 with the load moves together with the lower block 11 of the pulley, working from the crane winch. In this case, the upper block 10 of the pulley block is mounted on the bracket 6 by means of a finger 9. The change of the boom is carried out by power cylinders.

 To transfer the crane to work in the manipulator mode, install the bracket 12 in a vertical position by lifting the boom (see figure 2), raise the hook suspension 7 until it fully enters the catcher 14 of the bracket 12 (see Fig. 3 and 5). At the same time, the upper 10 and lower 11 blocks turn out to be a pulley rope pulled together by a flexible body and fixed on the bracket 12. Now you can remove the finger 9 of the upper block 10 fastening to the boom bracket 6 and release the sliding section 5 from the upper block 10 (see Fig. 4). The crane can work in the manipulator mode with various attachments mounted on the head of the sliding section without dismantling the winch.

Claims (1)

 LOADING CRANE ARROW, comprising a handle pivotally connected to telescopically sliding sections with the possibility of rotation of the latter by means of a power cylinder in a vertical plane, an arm fixed to the end of the extension section and mounted on it by means of a quick-detachable finger hook suspension on a flexible body, characterized in that it equipped with a fixed upper block fixed to the bracket by means of a quick-detachable finger and a paired movable lower block, forming together with their envelope with a flexible body working from a crane winch, a chain hoist of a hook suspension, and an additional bracket with catchers at the ends, mounted on the end of a non-extendable section with the possibility of entry, when telescoping folding sections and the extreme upper position of the hook suspension, in one of the catchers of the upper block, and in the other the lower block of the pulley block of the hook suspension with the vertical position of the additional bracket, while the bracket of the retractable section is configured to attach attachments to it after the connector with top block.