CN102381607A - Simple hoisting machine with power-free safety device - Google Patents

Abstract

The invention relates to a simple hoist with a non-powered safety device, which includes a steel wire rope for lifting objects, an electric hoist and a hook, and a non-powered safety device for preventing the lifting object from falling when the wire rope breaks, wherein the non-powered safety device includes two correspondingly arranged The track is corresponding to the wedges, brake wedges, guide wheels fixed on the lifting box on both sides of the track, and the cross bar connected with the hook. The two ends of the rod are respectively connected to the suspension rods and the brake wedges on both sides of the track through the lever; the brake wedge is sandwiched between the track and the wedge to move, and the brake wedge is in contact with the wedge slope, and The rails are in frictional contact, and the friction moves upward until the clamping rail stops. The invention is simple in structure, safe and reliable. In actual operation, accidents caused by wire rope tearing have been rescued many times. At the same time, it is economical and practical. Because of its simple structure, it only needs to keep a few hinge points flexible.

Description

Simple hoist with unpowered safety device

technical field

The present invention relates to a hoist, in particular to a simple hoist with a non-powered safety device.

Background technique

The hoist safety devices are currently powered. This safety device does provide a guarantee for the safe operation of the hoist, but this set of devices requires a large investment. Therefore, the simple hoist currently used by many companies has no safety device, which makes production Can not get safety guarantee, often bring bigger economic loss because of a steel wire rope breakage, serious person produces life accident. Accidents often occur in companies that use the lifting box and the goods in the box from a height of several meters due to broken wire ropes. The light ones will break and deform the lifting box, and it is not easy to repair the hoist in a narrow space. Breaking the lifted goods or causing casualties will make the operator terrified.

Contents of the invention

The purpose of the present invention is to improve and innovate on the defects and problems existing in the background technology, and to provide a simple hoist with a non-powered safety device.

The technical solution of the present invention is to construct an unpowered safety device including a wire rope for lifting objects, an electric hoist and a hook, and a broken wire rope to prevent the lifting objects from falling, wherein:

The unpowered safety device includes two corresponding tracks, wedges fixed on both sides of the tracks, brake wedges, guide wheels, and a cross bar connected to the hook. The upper part of the cross bar is connected to the hook, and the lower part of the cross bar The hanging hook is connected by a tension spring, and the two ends of the cross bar are respectively connected to each suspender and the brake wedges on both sides of the track through a lever;

The brake wedge is sandwiched between the track and the wedge to move, and the brake wedge is in contact with the slope of the wedge. The slope of the wedge is wide and narrow at the bottom, and the brake wedge is narrow at the top and wide at the bottom. The hook breaking brake wedge moves upwards through the action of the tension spring and is clamped on the upper part of the wedge to stop; the brake wedge is in frictional contact with the track, and moves upward until it clamps the track and stops.

Advantage of the present invention and beneficial effect:

The invention is simple in structure, safe and reliable. In actual operation, accidents caused by wire rope tearing have been rescued many times. At the same time, it is economical and practical. Because of its simple structure, it only needs to keep a few hinge points flexible.

Description of drawings

Figure 1 is a schematic diagram of the structure and principle of the present invention.

Detailed ways

As can be seen from Fig. 1, the present invention includes a wire rope 13 for lifting objects, an electric hoist 14 and a hook 9, and a non-powered safety device for preventing the lifting object from falling when the wire rope 13 breaks, wherein:

The non-powered safety device includes two tracks 1 correspondingly arranged, correspondingly arranged on both sides of the track 1 and fixed on the lifting box 2, the wedge 4, the brake wedge 5, the guide wheel 3, and the cross bar 8 connected with the hook 9, And the top of the cross bar 8 is connected with the hook 9, the bottom is connected with the hook 12 by the extension spring 10, and the two ends of the cross bar 8 are respectively connected with the brake wedges 5 of each suspender 6 and the both sides of the track 1 through the lever 7;

The brake wedge 5 is sandwiched between the track 1 and the wedge 4 to move, and the brake wedge 5 is in contact with the slope of the wedge 4, the slope of the wedge 4 is wide and narrow at the bottom, and the top of the brake wedge 5 is narrow. Lower width, when the steel wire rope 13 breaks or the hanging object hook 12 breaks, the brake wedge 5 moves upward through the action of the tension spring 10 and is stuck on the upper part of the wedge 4 to stop; the brake wedge 5 is in frictional contact with the track 1, The friction moves upward until the clamping track 1 stops.

Each lever 7 described in the present invention is provided with a fulcrum 11, and the connecting end of the cross bar of the lever 7 moves downward under force, and at the same time lifts the brake wedge 5 connected to the other end of the lever 7 through the fulcrum 11 and moves upward. The two ends of the crossbar 8 are respectively connected to two groups of levers 7 through hinges.

Structure and working principle of the present invention:

The hoist of the present invention is similar to an elevator and consists of two rails 1, a hoist box 2 and an electric hoist 14, wherein the hoist box 2 is equipped with four guide wheels 3, four wedges 4, four fulcrums 11, a hook 12, a A tension spring 10, one end of the tension spring 10 is connected to the hook 12 and the other end is pulled on the cross bar 8, the two ends of the cross bar 8 are respectively connected to four levers 7 through hinges, the other end of the lever 7 is connected to the suspension rod 6, and the suspension Bar 6 links to each other with brake wedge 5 at last, and the fishhook of electric hoist 14 hooks cross bar 8 .

The hook of the electric hoist 14 hooks the cross bar 8 to overcome the pulling force of the extension spring 10 under the normal working condition of the present invention, and lifts the lifting box through the steel wire rope 13 to move up and down. The lever 7 lifts the boom 6 through the fulcrum 11, and the boom 6 lifts the brake wedge 5 again. At this time, the inclined surface of the raised brake wedge 5 is close to the inclined surface of the wedge 4 on the lifting box, and the brake wedge 5 The other face is close to the rail 1 for frictional movement, when the friction force is greater than the gravity of the lifting box and its cargo, the four brake wedges 5 will clamp the two rails, and the entire lifting box and its cargo will be stationary up in the air. It protects the lifting box from freely falling from the air, breaks and deforms, and also avoids the loss of goods and casualties. After changing the new steel wire rope, only need hoist to be promoted upwards and now the brake wedge 5 is released under the reverse force effect of each mechanism, and the hoist returns to normal work.

The embodiments described in the present invention are only a description of the preferred implementation of the present invention, and are not intended to limit the concept and scope of the present invention. Various modifications and improvements made should fall within the protection scope of the present invention, and the technical content claimed in the present invention has been fully recorded in the claims.

Claims (3)

1. A simple hoist with a non-powered safety device, characterized in that it includes a wire rope (13) for lifting objects, an electric hoist (14) and a hook (9), and a wire rope (13) broken to prevent the lifting object from falling. Safety devices, of which: The non-powered safety device includes two corresponding tracks (1), correspondingly arranged on both sides of the track (1) and fixed on the lifting box (2) wedges (4), brake wedges (5), guide wheels (3 ), and the crossbar (8) connected with the hook (9), and the upper part of the crossbar (8) is connected with the hook (9), and the lower part is connected with the hook (12) through the extension spring (10), and the two crossbars (8) The ends are respectively connected to the suspension rods (6) and the brake wedges (5) on both sides of the track (1) through the lever (7); The brake wedge (5) is sandwiched between the track (1) and the wedge (4) to move, and the brake wedge (5) is in contact with the inclined surface of the wedge (4), and the inclined surface of the wedge (4) Wide at the top and narrow at the bottom, the brake wedge (5) is narrow at the top and wide at the bottom, the wire rope (13) or the hanging hook (12) breaks and the brake wedge (5) moves upward through the tension spring (10) and is stuck on the wedge The upper part of (4) stops; the brake wedge (5) is in frictional contact with the track (1), and the friction moves upward until the clamping track (1) stops. 2. The simple hoist with unpowered safety device according to claim 1, characterized in that each lever (7) is provided with a fulcrum (11), and the connecting end of the lever (7) is forced downward At the same time, the brake wedge (5) connected to the other end of the lever (7) moves upward through the fulcrum (11). 3. The simple hoist with unpowered safety device according to claim 1, characterized in that the two ends of the cross bar (8) are respectively connected to two groups of levers (7) through hinges.

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