CN214422156U - Lifting height limiting device of unmanned crane - Google Patents

Abstract

The utility model provides an unmanned crane lifting height limiting device, which comprises a main beam and a trolley, wherein the trolley comprises a frame, a winding drum arranged on the frame, and a steel wire rope wound on the winding drum, one end of the steel wire rope passes through the main beam to be connected with a lifting appliance, a height limiting device is arranged between the main beam and the lifting appliance, and the height limiting device comprises a fixed part arranged at the bottom of the trolley, a limiting switch arranged on the fixed part, a buffer part arranged at the upper part of the lifting appliance, and a movable part arranged at the upper side of the buffer part; the limit switch is associated with the winding drum, and the movable part and the fixed part are arranged oppositely. The lifting height limiting device of the unmanned crane has the advantages of scientific design and simplicity and convenience in operation, and the impact during lifting to the limit position can be effectively avoided, so that the lifting process is safer.

Description

Lifting height limiting device of unmanned crane

Technical Field

The utility model relates to a jack-up auxiliary assembly, specific theory has related to an unmanned crane promotes high stop device.

Background

A crane, also called a crown block, a gantry crane or a crane, refers to a multi-action hoisting machine that vertically lifts and horizontally carries heavy objects within a certain range. In the process of lifting the heavy object by the crane, however, because the lifting speed of the crane is high, when the heavy object is lifted to the upper limit position, the heavy object is easily lifted continuously under the action of inertia, so that other mechanisms of the lifting equipment are collided, and a certain potential safety hazard exists in the lifting process.

In order to solve the above problems, people are always seeking an ideal technical solution.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an unmanned crane promotes high stop device to the not enough of prior art.

In order to realize the purpose, the utility model discloses the technical scheme who adopts is:

a lifting height limiting device of an unmanned crane comprises a main beam and a trolley, wherein the trolley comprises a frame, a winding drum arranged on the frame and a steel wire rope wound on the winding drum, one end of the steel wire rope penetrates through the main beam to be connected with a lifting appliance, a height limiting device is arranged between the main beam and the lifting appliance, and the height limiting device comprises a fixed part arranged at the bottom of the trolley, a limiting switch arranged on the fixed part, a buffer part arranged at the upper part of the lifting appliance and a movable part arranged at the upper side of the buffer part; the limit switch is associated with the winding drum, and the movable part and the fixed part are arranged oppositely.

Based on the above, the fixed part includes the fixed plate, the middle part of fixed plate sets up the assembly pulley, the edge of fixed plate sets up limit switch, wire rope by the reel is in the warp the assembly pulley is connected the hoist.

On the basis, the buffering part comprises a buffering plate, a through hole is formed in the middle of the buffering plate so that the steel wire rope can pass through the buffering plate, a pulley mounting frame is arranged on the lower side of the buffering plate, a hoisting pulley is arranged on the pulley mounting frame, the hoisting pulley and the through hole are arranged oppositely, and the pulley mounting frame is located at the top of the lifting appliance.

Based on the above, the movable part and the buffer part are connected through a flexible connecting piece.

Based on the above, the flexible connecting piece includes a set of vertical connecting rod and a set of slope connecting rod, the upper end of vertical connecting rod with the movable part is connected, the lower extreme of vertical connecting rod with the upper end of slope connecting rod is articulated, the lower extreme of slope connecting rod with the buffer portion is articulated.

Based on the above, the movable part corresponds the buffering part sets up a set of buffer spring, and under the natural state, buffer spring's length is greater than the length of vertical connecting rod.

The utility model discloses relative prior art has substantive characteristics and progress, specific theory, the utility model provides an unmanned crane promotes high stop device has design science, easy and simple to handle's advantage, can effectively avoid rising to take place to push away when extreme position for the jack-up process is safer. In the specific use process, the lifting appliance is connected with a heavy object, the winding drum is started so as to lift the heavy object, and when the heavy object is lifted to an upper limit position, the movable part is close to or even abutted against the limit switch, so that the winding drum stops rotating, and the phenomenon of top rushing caused by continuous lifting is avoided; meanwhile, due to the design of the buffer part, the phenomenon that the heavy object is continuously lifted under the action of inertia to cause top impact is avoided.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the fixing portion of the present invention.

In the figure: 1. a reel; 2. a frame; 3. a fixed part; 4. a limit switch; 5. a movable portion; 6. a vertical connecting rod; 7. a tilt link; 8. a buffer section; 9. a buffer spring; 10. a through hole; 11. a pulley.

Detailed Description

The technical solution of the present invention will be described in further detail through the following embodiments.

As shown in fig. 1-2, an unmanned crane lifting height limiting device comprises a main beam and a trolley, wherein the trolley comprises a frame 2, a winding drum 1 arranged on the frame 2, and a steel wire rope wound on the winding drum 1, one end of the steel wire rope passes through the main beam to be connected with a lifting appliance, a height limiting device is arranged between the main beam and the lifting appliance, and the height limiting device comprises a fixed part 3 arranged at the bottom of the trolley, a limit switch 4 arranged on the fixed part 3, a buffer part 8 arranged at the upper part of the lifting appliance, and a movable part 5 arranged at the upper side of the buffer part 8; the limit switch 4 is associated with the winding drum 1, and the movable part 5 is arranged opposite to the fixed part 3. Specifically, the limit switch can adopt the conventional model (proximity switch or travel switch) sold on the market at present, and the connection or/and the control circuit between the limit switch and the driving motor for driving the reel to rotate are the prior art, are not improved, and are not repeated. Specifically, the movable portion and the buffer portion may be connected by a flexible connecting member or an elastic member.

When the lifting appliance is used, the lifting appliance is connected with a heavy object, the winding drum is started so as to lift the heavy object, and when the heavy object is lifted to an upper limit position, the movable part is close to or even abutted against the limit switch, so that the winding drum stops rotating, and the phenomenon of top rushing caused by continuous lifting is avoided; meanwhile, due to the design of the buffer part, the phenomenon that the heavy object is continuously lifted under the action of inertia to cause top impact is avoided.

Specifically, the fixed part 3 comprises a fixed plate, a pulley block is arranged in the middle of the fixed plate, a limit switch 4 is arranged at the edge of the fixed plate, and the steel wire rope is wound by the winding drum 1 and connected with the lifting appliance through the pulley block. Specifically, a through hole is formed in the middle of the fixing plate so that a steel wire rope can pass through the through hole, the pulley block can be installed between the fixing plate and a trolley frame or through the through hole, the limit switch is prevented from being influenced, preferably, at least two groups of pulleys can be arranged on the pulley block so that the steel wire rope can be wound, and the steel wire rope is prevented from being in direct contact with the inner wall of the through hole for a long time to cause abrasion; when the pulley is disposed inside the through hole 10, the through hole may be a square hole or other irregular hole for mounting the pulley. The pulley block and the pulley mounting rack can adopt the existing mounting mode.

Specifically, buffer 8 includes the buffer board, the through-hole is seted up so that wire rope passes through in the middle part of buffer board, the downside of buffer board sets up the pulley mounting bracket, the pulley mounting bracket is installed and is lifted by crane the pulley, lift by crane the pulley with the through-hole sets up relatively, the pulley mounting bracket is located the top of hoist. In the use process, the steel wire rope is actually connected with the lifting appliance through the lifting pulley, and the design of the pulley block and the pulley mounting rack can adopt the existing mounting mode.

Specifically, the movable part 5 and the buffer part 8 are connected through a flexible connecting piece.

Specifically, the flexible connecting piece includes a set of vertical connecting rod 6 and a set of slope connecting rod 7, the upper end of vertical connecting rod 6 with movable part 5 is connected, the lower extreme of vertical connecting rod with the upper end of slope connecting rod 7 is articulated, the lower extreme of slope connecting rod 7 with buffer 8 is articulated. Specifically, the hinge joint can adopt damping hinge joint, so that the phenomenon that the hinge joint is too flexible and slides back and forth is avoided. In the use, when the reel stall, under the inertial action, the hoist continues to rise, and the angle of slope connecting rod changes and can effectively play the buffering effect.

Specifically, the movable portion 5 is provided with a group of buffer springs 9 corresponding to the buffer portion 8, and in a natural state (i.e., no stretching or compression), the length of the buffer springs 9 is greater than that of the vertical connecting rod 6, and further the buffer is performed through the elastic force of the springs.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.

Claims (6)

1. The utility model provides an unmanned crane promotes high stop device, includes girder and trolley, trolley include the frame, set up reel on the frame, twine in wire rope on the reel, wire rope's one end is passed the girder and is connected the hoist, the girder with set up high stop device, its characterized in that between the hoist: the height limiting device comprises a fixed part arranged at the bottom of the trolley, a limiting switch arranged on the fixed part, a buffer part arranged at the upper part of the lifting appliance and a movable part arranged at the upper side of the buffer part; the limit switch is associated with the winding drum, and the movable part and the fixed part are arranged oppositely.

2. The unmanned crane lifting height limiting device according to claim 1, wherein: the fixed part comprises a fixed plate, a pulley block is arranged in the middle of the fixed plate, a limit switch is arranged at the edge of the fixed plate, and the steel wire rope is wound by the winding drum through the pulley block and connected with the lifting appliance.

3. The unmanned crane lifting height limiting device according to claim 1 or 2, wherein: the buffer part comprises a buffer plate, a through hole is formed in the middle of the buffer plate so that a steel wire rope can pass through the through hole, a pulley mounting frame is arranged on the lower side of the buffer plate, a hoisting pulley is mounted on the pulley mounting frame, the hoisting pulley and the through hole are arranged oppositely, and the pulley mounting frame is located at the top of the lifting appliance.

4. The unmanned crane lifting height limiting device of claim 3, wherein: the movable part is connected with the buffer part through a flexible connecting piece.

5. The unmanned crane lifting height limiting device of claim 4, wherein: the flexible connecting piece comprises a group of vertical connecting rods and a group of inclined connecting rods, the upper ends of the vertical connecting rods are connected with the movable portion, the lower ends of the vertical connecting rods are hinged with the upper ends of the inclined connecting rods, and the lower ends of the inclined connecting rods are hinged with the buffer portion.

6. The unmanned crane lifting height limiting device of claim 5, wherein: the movable part corresponds the buffering part sets up a set of buffer spring, under the natural state, buffer spring's length is greater than the length of vertical connecting rod.

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