CN212531987U - Rotatable lifting appliance of bridge crane - Google Patents

Abstract

The utility model discloses a rotatable hoist of bridge crane, the hoist is connected on the hoist through the lifting rope, characterized by, the hoist include inside lifting hook cover and the lifting hook that is equipped with cylindrical cavity, lifting hook cover top is equipped with the opening, the lifting hook top be equipped with extension spring, extension spring's upper end is fixed in the upper end of lifting hook cover, lifting hook cover inner wall on be equipped with the helicla flute, the lifting hook on be fixed and be equipped with the arch, arch and helicla flute sliding connection, when there is not load on the lifting hook, the arch be in the top of helicla flute; when the lifting hook is loaded, the protrusion slides to the bottom of the spiral groove and drives the lifting hook to rotate for an angle. The utility model discloses a rotatable hoist of bridge crane through the slip of the arch on the lifting hook at the helicla flute of lifting hook cover to drive reciprocating and the rotation of lifting hook in the lifting hook cover, avoid using the motor to rotate, simplified complicated rotation hoist, and kept very fast rotation rate.

Description

Rotatable lifting appliance of bridge crane

Technical Field

The utility model relates to a lifting means, especially a rotatable hoist of bridge crane.

Background

At present, due to the requirements of materials such as light building materials and the like, an object needs to be rotated by an angle in the unloading and carrying process, and then is unloaded and stored; at present, a crane used in the market only comprises a pulley block and a lifting appliance, and has the disadvantages that the lifting appliance can only swing in one direction and cannot rotate, and when the lifting appliance needs to rotate, the lifting appliance can only rotate in a manual-assisted manner, so that the crane is very inconvenient and wastes manpower; some rotary lifting appliances exist on the market, but all the lifting appliances need a high-power motor and multi-stage transmission, have relatively complex structures and need to generate relatively large example sentences for driving. For example, the single hook head disk electric rotating device of the double-beam bridge crane disclosed in the chinese patent document, whose publication number CN201512349U, includes a large gear, a small gear and a motor, the large gear is fixed on the crane hook head, the small gear is matched with the large gear; the motor is installed on the crane beam and is connected with the pinion through the speed reducer. In order to prevent the hook head from being heavier, a balancing weight which has the same weight as the motor, the speed reducer and the pinion is arranged on the cross beam; however, the suspension hook has the disadvantages that a high-power motor is required for driving, the rotation of the suspension hook is controlled by the speed reducer and two-stage gear transmission, the structure is relatively complex, when the suspension object is heavy, a large torque is required to be provided for driving the suspension object to rotate, and the rotating speed is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model relates to an it is rotatory to overcome prior art crane control suspension thing, and the structure is complicated, and the slower problem of rotation rate provides one kind and does not use the motor to rotate, simple structure, the quick rotatable hoist of bridge crane of rotation rate.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a rotatable lifting appliance of a bridge crane is connected to the crane through a lifting rope and comprises a lifting hook sleeve and a lifting hook, wherein a cylindrical cavity is formed in the lifting hook sleeve, an opening is formed in the top of the lifting hook sleeve, the upper end of the lifting hook is connected to the lifting hook sleeve in a lifting and rotating mode, a spiral groove is formed in the inner wall of the lifting hook sleeve, a protrusion is fixedly arranged on the lifting hook and is connected with the spiral groove in a sliding mode, and when no load exists on the lifting hook, the protrusion is located at the top of the spiral groove; when the lifting hook is loaded with load, the bulge slides to the bottom of the spiral groove and drives the lifting hook to rotate for an angle; make the hoist not take place to rock in work through the lifting rope, lifting hook downstream when lifting by crane the load, protruding along helicla flute downstream on the drive lifting hook, and simultaneously, the arch rotates on the circular wall face, thereby it rotates at the lifting hook cover inside to drive the lifting hook, utilize the gravity of load to realize the rotation of lifting hook, thereby drive the rotation of load, satisfy in handling, need rotate the demand of certain angle, after the uninstallation, the lifting hook is automatic to reply to the lifting hook cover upper portion, the top of helicla flute is got back again to the arch on the lifting hook simultaneously, be convenient for next handling swing operation of hoist.

Preferably, the top of the lifting hook is provided with an extension spring, and the upper end of the extension spring is fixed at the upper end of the lifting hook sleeve; the reset of the lifting hook is completed by stretching the spring, when no load exists, the spring keeps a contracted state, and the lifting hook can be arranged on the upper side of the lifting hook sleeve; when the load is lifted, the load pulls the lifting hook to move downwards, so that the lifting hook rotates under the action of the load force, and when the load is put down, the lifting hook moves upwards under the action of the restoring force of the tension spring and completes resetting, so that the next lifting and rotating for carrying the load are facilitated.

Preferably, the upper end of the lifting hook is provided with a step protruding outwards, and the bottom of the lifting hook sleeve is provided with a step structure corresponding to the step of the lifting hook; the lifting hook is suspended through a lifting rope or an extension spring, the situation that the lifting hook falls off cannot occur, but in order to prevent the problem that the lifting hook falls off caused by the breakage of the spring, a step is arranged on the lifting hook; in addition, the ladder structure that sets up can be so that the lifting hook obtains ladder structure's support after rotatory completion for the arch on the lifting hook does not hang the gravity influence of load, has improved the security of work.

Preferably, the central angle of the two ends of the spiral groove corresponding to the inner wall surface of the lifting hook sleeve is 90 degrees; set up the angle of spout to 90 degrees, come to satisfy long material, when unloading from the freight train like timber, reinforcing bar, need rotate 90 degrees scenes of depositing with the material, when the material of hoisting, the arch downstream in the helicla flute to rotate 90 degrees, the material because inertia can be slight rock, later keep steady very fast, wait to steady after, put into the material again on the position that needs were deposited.

Preferably, the angle formed by the spiral groove and the horizontal plane is 40-50 degrees, when the included angle between the spiral groove and the horizontal plane is too small, the downward friction force of the material is increased, the protrusion cannot conveniently slide and rotate downwards, when the included angle between the spiral groove and the horizontal plane is too large, the falling speed of the material is very high, the material is too large in shaking, the angle formed by the spiral groove and the horizontal plane is 45-50 degrees, the downward sliding of the lifting hook is smooth, the clamping cannot occur, and the falling speed cannot be too large.

Preferably, a spring fixing plate is arranged at the opening of the hook sleeve, and the spring is fixed on the spring fixing plate; the spring fixing plate is fixed in the opening of the hook sleeve through threads, the spring is fixed on the inner side of the hook sleeve of the spring fixing plate, and then the spring is fixed at the top of the lifting hook, so that the spring naturally droops, and the whole device is fixed.

Preferably, the lifting ropes are three to four and are uniformly and fixedly connected to the top of the lifting hook sleeve; the lifting appliance is easy to shake in the lifting process, and three to four lifting ropes are arranged at the top of the lifting hook sleeve; the lifting rope is fixed on the crane, so that the lifting hook is not easy to shake in the lifting and carrying processes, and the carrying and the rotation of the load can be stably completed.

Preferably, the spiral grooves are two to four and are uniformly arranged on the inner wall of the hook sleeve; single arch rotates at the helicla flute, and is unstable when making the lifting hook rotate, sets up two to four helicla flutes and arch, and the arch slides in the helicla flute for it is more steady to slide and rotate.

Therefore, the utility model discloses following beneficial effect has: (1) the rotating speed is high; (2) the motor is prevented from rotating, and the structure is simple.

Drawings

FIG. 1 is a schematic structural diagram of a rotatable sling of a bridge crane in embodiment 1;

fig. 2 is a cross-sectional view of the hook cover.

1, lifting a rope; 2, lifting a hanger; 3, hanging a hook sleeve; 4, a lifting hook; 5, a spiral groove; 6, protruding; 7, an extension spring; 8, a step; and 9, a step structure.

Detailed Description

The following provides a further description of embodiments of the present invention by way of examples and with reference to the accompanying drawings.

Example 1

In embodiment 1 shown in fig. 1, a rotatable lifting appliance of a bridge crane, wherein a lifting appliance 2 is connected to the crane through four lifting ropes 1 uniformly and fixedly connected to the crane, the rotatable lifting appliance is characterized in that the lifting appliance comprises a lifting hook sleeve 3 and a lifting hook 4, the lifting hook sleeve is provided with an opening at the top, an extension spring 7 is arranged at the top of the lifting hook, a spring fixing plate is arranged at the opening of the lifting hook sleeve, the spring is fixed on the spring fixing plate, the upper end of the lifting hook is provided with an outwardly protruding step 8, the bottom of the lifting hook sleeve is provided with a stepped structure 9 corresponding to the step of the lifting hook, a spiral groove 5 is arranged on the inner wall of the lifting hook sleeve, a protrusion 6 is fixedly arranged on the lifting hook, the protrusion is in sliding connection with the spiral groove, and the central angle of the two ends of the spiral groove corresponding to the inner wall surface of the lifting, the angle formed by the spiral grooves and the horizontal plane is 45 degrees, the number of the spiral grooves is four, the four spiral grooves are uniformly arranged on the inner wall of the hook sleeve, and when no load exists on the hook, the protrusions are positioned at the tops of the spiral grooves; when the lifting hook is loaded, the protrusion slides to the bottom of the spiral groove and drives the lifting hook to rotate for an angle.

When the lifting hook is used, the extension spring is in a natural falling state, the crane is put down, and then an object to be carried is fixed on the lifting hook; lifting the crane, wherein the lifting hook moves downwards under the action of the gravity of the object, the protrusion on the lifting hook slides in the spiral groove and drives the lifting hook to rotate, the rotation of the lifting hook drives the object to rotate at the same time, the object rotates by 90 degrees again and then continues to rotate due to inertia, but the hook does not rotate, so that the object can shake; after the object is stable, moving the crane to a position to be placed, and unloading the object; after unloading, the hook rebounds under the restoring force of the extension spring and returns to a natural falling state, so that the next conveying rotation operation is performed again.

Claims (8)

1. A rotatable lifting appliance of a bridge crane is characterized by comprising a lifting hook sleeve (3) and a lifting hook (4), wherein a cylindrical cavity is formed in the lifting hook sleeve, an opening is formed in the top of the lifting hook sleeve, the upper end of the lifting hook is connected in the lifting hook sleeve in a lifting and rotating mode, a spiral groove (5) is formed in the inner wall of the lifting hook sleeve, a protrusion (6) is fixedly arranged on the lifting hook and is in sliding connection with the spiral groove, and when no load exists on the lifting hook, the protrusion is located at the top of the spiral groove; when the lifting hook is loaded, the protrusion slides to the bottom of the spiral groove and drives the lifting hook to rotate for an angle.

2. A rotatable sling for a bridge crane according to claim 1, wherein the top of the hook is provided with a tension spring (7), the upper end of which is fixed to the upper end of the hook housing.

3. A rotatable spreader for a bridge crane according to claim 1 wherein the hook has an outwardly projecting step (8) at its upper end and the hook housing has a stepped configuration (9) at its base corresponding to the step of the hook.

4. The rotatable hanger of a bridge crane according to claim 1, wherein the two ends of the spiral groove are disposed at 90 ° relative to the inner wall surface of the hook housing.

5. A rotatable spreader according to claim 4 wherein the helical groove forms an angle of 40 to 50 degrees with the horizontal.

6. The rotatable sling of claim 2 wherein the hook sleeve has a spring retaining plate at an opening thereof, and the spring is secured to the spring retaining plate.

7. The rotatable sling of claim 1 wherein three to four of the lifting ropes are uniformly and fixedly attached to the top of the hook sleeve.

8. The rotatable sling of a bridge crane according to any one of claims 1-7, wherein two to four helical grooves are provided, evenly arranged on the inner wall of the hook sleeve.

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