A miniature lever hoist

Abstract

A miniature manual lever hoist, comprising a hoist body (2), and an upper hook (1) connected to an upper end of the hoist body (2). A handle (3) is provided on one side of the hoist body (2); the handle (3) is transmittingly connected to a lifting chain wheel (17) by means of a direction-turning ratchet mechanism, a long shaft (8), and a braking ratchet mechanism; a lifting endless chain (4) surrounds the lifting chain wheel (17); a lower hook (5) is provided on a tail end of the lifting endless chain (4). The hoist body (2) comprises a rack; the rack comprises a first rack (7) and a second rack (9) that are connected in mutually enclosed and locked fashion. The lifting chain wheel (17) is provided within the first rack (7) and the second rack (9). By improving the rack of the hoist body, the spatial setting, and the transmission assembly, the manual lever hoist implements a more compact overall structure, a small volume, light weight, and more stable operation.

Description

Technical field [0001] The invention relates to a lever hoist. Background technique [0002] The lever hoist is mostly used for lifting heavy objects, so it is widely used in industrial and mining enterprises, storage docks, film and television scene erection, power transmission line erection and other places. The existing lever hoist includes the left wall panel, the right wall panel, the cover, the sprocket, the hoisting chain, the reduction gear set, the ratchet mechanism and the drive handle, etc. The left wall panel and the right wall panel are two flat plates, It is placed on both sides of the sprocket and connected by supporting rods, and the hoisting chain is passed between the left and right wall panels and surrounds the sprocket. Since the left wall panel and the right wall panel are separated and connected by struts, the sprocket and the lifting chain are exposed, and foreign objects are likely to fall between the left and right wall panels during use, thereby affecti...

AI Technical Summary

Problems solved by technology

Since the separation of the left wall panel and the right wall panel is connected by a strut, the sprocket and the lifting chain are exposed, and foreign objects are easy to fall between the left and right wall panels during use, thereby affecting the lifting chain and the sprocket The stability of the transmission, the body is also easy to damage

When the left and right wallboards are connected by rods, there will inevitably be deviations, which will cause the shaft holes at both ends of the restraint transmission gear to be out of concentricity. Such a structural design has low transmission efficiency, large hand pull force, large transmission ratio, and large gear volume, resulting in The whole body is large and heavy

Among them, the materials of the left and right wall panels, casings, handles and handwheels are all made of steel, which will also cause heavy product weight.

It is very inconvenient to operate due to large wrench force, large volume and heavy weight

In addition, a hook shaft is fastened between the small shaft holes on the upper side of the left wallboard and the right wallboard, and the upper hook is passed on the hook shaft. If the upper hook is to be replaced, the entire body needs to be disassembled, which is also very inconvenient

Images