CN221876416U - Lifting equipment - Google Patents

Abstract

The utility model provides lifting equipment, which comprises a vehicle body, a rotating table and a lifting device, wherein the rotating table is rotatably arranged on the vehicle body, the lifting device comprises a telescopic boom, a hoisting mechanism, a lifting hook and a first driving mechanism, the telescopic boom is hinged with the rotating table, the hoisting mechanism is arranged on the telescopic boom or the rotating table, a lifting rope of the hoisting mechanism bypasses the extending tail end of the telescopic boom, the lifting hook is connected with the free end of the lifting rope, the first driving mechanism drives the telescopic boom to rotate relative to the rotating table, the lifting device further comprises a first buffer mechanism, the first buffer mechanism is arranged on the extending tail end, the lifting rope penetrates through the first buffer mechanism, and the first buffer mechanism is used for buffering the tensile force exerted by the lifting rope. The lifting equipment has the advantage of prolonging the service life of the lifting rope.

Description

A lifting device

Technical Field

The utility model relates to the technical field of mechanical equipment, in particular to a lifting device.

Background Art

The steel-concrete composite beam structure combines the tensile properties of steel and the compressive properties of concrete. It has the advantages of light weight, strong spanning capacity, convenient construction, and short construction period. It overcomes the shortcomings of low overall stiffness and poor stability of traditional steel structures. It has excellent overall performance and is therefore widely used in highway bridge construction. At present, the lifting equipment used to hoist the steel-concrete composite beam structure during construction is mainly a crane.

When the existing crane is lifting an object (such as a steel-concrete composite beam member), the object is first lifted by a winch and a telescopic arm, and then the telescopic arm is rotated to transport the object to a specified location. However, during the process of lowering the suspended object by the crane, when the winch is just started, the pulling force of the winch on the wire rope is the sum of the gravity of the suspended object and the inertia of the suspended object. After the suspended object leaves the ground, the pulling force on the wire rope is the weight of the suspended object. However, since the time the suspended object leaves the ground is very short, the stress on the wire rope will change drastically in a very short time, causing the wire rope to be subjected to a large tearing force, resulting in slight damage to the wire rope. Therefore, the wire rope is very likely to break after a certain period of use, reducing the service life of the wire rope and posing a greater safety risk. In addition, since the wire rope is a flexible object, during the rotation of the telescopic arm, when the telescopic arm suddenly stops rotating, the suspended object will continue to move due to inertia, which will cause the suspended object to swing after the telescopic arm stops rotating, increasing the time for lowering, installing or placing the suspended object and reducing work efficiency.

Summary of the invention

In order to solve the above problems, the main purpose of the utility model is to provide a lifting device which can prolong the service life of the lifting rope.

In order to achieve the main purpose of the utility model, the utility model provides a lifting equipment, including a vehicle body, a rotating table and a lifting device, the rotating table can be rotatably installed on the vehicle body, the lifting device includes a telescopic boom, a hoisting mechanism, a hook and a first driving mechanism, the telescopic boom is hinged to the rotating table, the hoisting mechanism is installed on the telescopic boom or the rotating table, the hoisting rope of the hoisting mechanism passes around the extended end of the telescopic boom, the hook is connected to the free end of the rope, and the first driving mechanism drives the telescopic boom to rotate relative to the rotating table, wherein the lifting device also includes a first buffer mechanism, the first buffer mechanism is installed on the extended end, the rope passes through the first buffer mechanism, and the first buffer mechanism is used to buffer the tension exerted on the rope.

As can be seen from the above, by providing the first buffer mechanism, when the winch mechanism is winding and recovering the lifting rope, at the moment the suspended object is lifted off the ground, the first buffer mechanism can offset the excess tension on the lifting rope caused by the initial inertia of the suspended object, thereby preventing the lifting rope from being subjected to a large tearing force, and effectively extending the service life of the lifting rope.

A preferred solution is that the first buffer mechanism includes a box body, a first pulley, a second pulley, a sliding member and an elastic member, a slide groove is provided in the box body, the slide groove extends along a first height direction of the box body or a second height direction of the vehicle body, the first pulley and the second pulley are respectively rotatably installed in the box body around their own rotation axes, the sliding member is slidably connected to the slide groove, a third pulley is provided on the sliding member, in the first height direction, the third pulley is located at the lower side of the first pulley and at the lower side of the second pulley, the lifting rope passes around the first pulley, the second pulley and the third pulley in turn and extends from the bottom of the box body, and the elastic member forces the sliding member to move to the top of the box body.

As can be seen from the above, through the design of the first buffer mechanism, when the winch mechanism reels and recovers the lifting rope, under the action of the gravity of the suspended object, the lifting rope will drive the third pulley and the sliding part to descend and cause the elastic part to be compressed and store energy. At the moment the suspended object leaves the ground, the elastic part offsets the excess tension on the lifting rope caused by the initial inertia of the suspended object through its own stored elastic potential energy, thereby avoiding the lifting rope from being subjected to a large pulling force, thereby extending the life of the lifting rope.

A further solution is that the first buffer mechanism also includes a reset unit, which is located at the bottom of the box. The reset unit includes a guide rod, two sliders, an elastic component, a sleeve and two connecting arms. The guide rod is installed on the box and is parallel to the hinge axis of the telescopic boom. The two sliders can be slidably installed on the guide rod. The elastic component forces the two sliders to move toward each other. The sleeve is mounted on the lifting rope. A connecting arm is hinged between a slider and the sleeve. The two connecting arms cooperate with the sleeve to force the two sliders to move away from each other.

As can be seen from the above, since the rotation of the turntable drives the telescopic boom and the suspended object thereon to rotate, the suspended object drives the suspension rope to swing roughly in the extension direction of the guide rod, and the design of the reset unit can effectively reduce the swing amplitude of the suspension rope, so as to shorten the swing time of the suspended object after the turntable stops rotating, thereby reducing the installation or placement time of the suspended object, which is conducive to improving work efficiency.

Another preferred solution is that the rotating table includes a table body, a second driving mechanism and a second buffer mechanism, the telescopic arm is hinged to the table body, the second driving mechanism can drive the table body to rotate, the second buffer mechanism is connected between the table body and the second driving mechanism, and the second buffer mechanism is used to buffer the rotational inertia of the table body and the telescopic arm.

As can be seen from the above, a second buffer mechanism is arranged between the platform and the second driving mechanism, so that when the second driving mechanism stops driving the platform, the second buffer mechanism can buffer and offset the moving inertia of the platform, the telescopic boom and the suspended object, so that the suspended object can stop moving in a short time, so as to further shorten the installation or placement time of the suspended object and further improve work efficiency.

A further solution is that the second buffer mechanism includes a rotating shaft and a connecting seat, the rotating shaft is rotatably connected to the vehicle body around its own axis, the rotating shaft has a plate portion, a plurality of driving blocks are provided on the top of the plate portion, the second driving mechanism drives the rotating shaft to rotate, the platform is installed on the connecting seat, a plurality of transmission blocks are provided at the bottom of the connecting seat, the plurality of transmission blocks and the plurality of driving blocks are alternately distributed around the rotating shaft, an elastic damping member is provided between the adjacent transmission blocks and the driving blocks, the elastic damping member prevents the transmission blocks and the driving blocks from rotating relative to each other around the rotating shaft.

As can be seen from the above, through the design of the second buffer mechanism, when the second driving mechanism stops driving the rotating shaft, the second buffer mechanism absorbs and buffers the moving inertia of the platform, the telescopic boom and the suspended object through the elastic damping member, thereby shortening the swinging time of the suspended object due to inertia, so that the suspended object can be quickly installed or placed.

A further solution is that connecting pieces are respectively provided at both ends of the elastic damping piece, one of the two connecting pieces is connected to the driving block ball joint, and the other of the two connecting pieces is connected to the transmission block ball joint.

As can be seen from the above, the above design enables the elastic damping member to better move relative to the driving block and the transmission block, so as to better absorb and buffer the moving inertia of the platform, the telescopic boom and the suspended object.

A further solution is that the rotating shaft passes through the plate portion, and the rotating shaft is rotatably connected to the connecting seat around its own axis.

As can be seen from the above, the rotating shaft passes through the plate portion and is rotatably connected to the connecting seat, so that the rotating shaft and the connecting seat can rotate relatively smoothly and reliably, and the second buffer mechanism can reliably absorb and buffer the moving inertia of the platform, telescopic boom and the suspended object.

A further solution is that the second driving mechanism includes a first motor and a gear set, the first motor is mounted on the vehicle body, the input end of the gear set is connected to the output shaft of the first motor, and the output end of the gear set is connected to the rotating shaft.

As can be seen from the above, the above design enables the first motor to stably and reliably drive the rotating shaft to rotate through the gear set, thereby driving the platform to drive the telescopic boom, the hoisted object, etc. to move.

A further solution is that the telescopic boom is a multi-stage telescopic boom; the first driving mechanism is an oil cylinder, and the oil cylinder is hinged between the telescopic boom and the rotating platform.

As can be seen from the above, the use of a multi-stage telescopic boom can better expand the lifting operation range of the lifting equipment and improve the practicability of the lifting equipment; and the use of a cylinder as the first driving mechanism can enable the first driving mechanism to smoothly and reliably drive the telescopic boom to pitch and swing to adapt to different working environments and meet different working requirements.

A further solution is that the vehicle body is provided with a walking wheel mechanism or a crawler track mechanism.

As can be seen from the above, the above design enables the traveling mechanism of the vehicle body to be set as required to meet the terrain requirements of different working environments.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a lifting device embodiment of the utility model.

FIG. 2 is a partial cross-sectional schematic diagram of an embodiment of the lifting device of the utility model.

FIG. 3 is an enlarged view of point A in FIG. 2 .

FIG. 4 is a schematic cross-sectional view of the second buffer mechanism of the lifting equipment embodiment of the utility model.

FIG5 is a schematic cross-sectional view of the first buffer mechanism of the lifting equipment embodiment of the utility model.

FIG. 6 is a schematic structural diagram of the first buffer mechanism of the lifting equipment embodiment of the utility model.

The present invention will be further described below with reference to the accompanying drawings and embodiments.

DETAILED DESCRIPTION

1 , the lifting equipment 100 includes a vehicle body 1, a rotating platform 2, a hanging device 3 and a control system, wherein the control system is electrically connected to the vehicle body 1, the rotating platform 2 and the hanging device 3 respectively.

The vehicle body 1 is provided with a walking wheel mechanism 11 to facilitate the movement of the lifting equipment 100 to the work area for operation; of course, as another optional solution, in other embodiments, a crawler mechanism may also be provided on the vehicle body 1 to replace the walking wheel mechanism 11; it can be seen that the walking mechanism of the vehicle body 1 can be set as needed to meet the terrain requirements of different working environments.

In conjunction with FIG. 2 and FIG. 3 , the rotating table 2 is rotatably mounted on the crane, and the hoisting device 3 is mounted on the rotating table 2, so that the rotating table 2 can drive the hoisting device 3 and the suspended object hoisted by the hoisting device 3 to rotate, so that the suspended object can be hoisted and moved from one position to another position within the working area of the lifting equipment 100. The rotating table 2 preferably includes a table body 21, a first driving mechanism 34, and a second driving mechanism 22; the hoisting device 3 is mounted on the table body 21, the second driving mechanism 22 is used to drive the table body 21 to rotate, and the second buffer mechanism 23 is connected between the table body 21 and the second driving mechanism 22, and the second buffer mechanism 23 is used to buffer the rotational inertia of the table body 21 and the telescopic boom 31.

In conjunction with FIG. 4 , the second buffer mechanism 23 preferably includes a rotating shaft 231 and a connecting seat 232. The rotating shaft 231 is rotatably mounted on the vehicle body 1 around its own rotation axis. The rotating shaft 231 has a plate portion 2311, and a plurality of driving blocks 2312 are arranged on the top of the plate portion 2311. The connecting seat 232 is fixedly connected to the platform 21, and a plurality of transmission blocks 2321 are arranged at the bottom of the connecting seat 232. The number of transmission blocks 2321 is the same as the number of driving blocks 2312, and the plurality of driving blocks 2312 and the plurality of transmission blocks 2321 are alternately distributed around the rotating shaft 231. Among them, an elastic damping member 233 is arranged between the adjacently arranged transmission blocks 2321 and the driving blocks 2312. The elastic damping member 233 is used to hinder the relative rotation of the transmission blocks 2321 and the driving blocks 2312 around the rotating shaft 231, so as to absorb and buffer the moving inertia of the platform 21, the telescopic boom 31 and the suspended object.

The elastic damping member 233 preferably adopts the first compression spring; of course, as another optional solution, the elastic damping member 233 may also adopt other elastic damping members 233 having the same function as the first compression spring, so examples are not given here one by one. Preferably, the two ends of the elastic damping member 233 are respectively provided with connecting members 234, one of the two connecting members 234 is connected to the driving block 2312 by a ball joint, and the other of the two connecting members 234 is connected to the transmission block 2321 by a ball joint. The setting of the connecting member 234 enables the elastic damping member 233 to better move relative to the driving block 2312 and the transmission block 2321, so as to better absorb and buffer the moving inertia of the platform 21, the telescopic boom 31 and the suspended object.

Furthermore, the rotating shaft 231 preferably passes through the plate portion 2311, so that the rotating shaft 231 is also rotatably connected to the connecting seat 232 around its own axis. The rotating shaft 231 passes through the plate portion 2311 and is rotatably connected to the connecting seat 232, so that the rotating shaft 231 and the connecting seat 232 can perform a relatively stable and reliable relative rotation, and thus the second buffer mechanism 23 can reliably absorb and buffer the moving inertia of the platform 21, the telescopic boom 31 and the suspended object.

The second driving mechanism 22 preferably includes a first motor 221 and a gear set 222. The first motor 221 is mounted on the vehicle body 1. The input end of the gear set 222 is connected to the output shaft of the first motor 221, and the output end of the gear set 222 is connected to the rotating shaft 231. Through the design of the second driving mechanism 22, the first motor 221 can stably and reliably drive the rotating shaft 231 to rotate through the gear set 222, thereby driving the platform 21 to drive the telescopic boom 31, the suspended object, etc. to move.

A second buffer mechanism 23 is provided between the platform 21 and the second driving mechanism 22. Combined with the design of the second buffer mechanism 23, when the second driving mechanism 22 stops driving the rotating shaft 231, the second buffer mechanism 23 absorbs and buffers the moving inertia of the platform 21, the telescopic boom 31 and the suspended object through the elastic damping member 233, so that the suspended object can stop moving in a short time, thereby shortening the swinging time of the suspended object due to inertia, so that the suspended object can be quickly installed or placed, thereby improving work efficiency.

The hoisting device 3 includes a telescopic boom 31, a hoisting mechanism 32, a hook 33, a first driving mechanism 34 and a first buffer mechanism 35. The telescopic boom 31 is hinged to the platform 21, so that the rotating platform 2 can drive the boom to rotate, so that the hoisted object can be hoisted and moved from one position to another within the working area of the lifting equipment 100, and the hinge between the telescopic boom 31 and the rotating platform 2 allows the telescopic boom 31 to pitch and swing relative to the rotating platform 2 to adapt to different working environments and meet different working requirements. Preferably, the telescopic boom 31 adopts a multi-stage telescopic boom 31, so that the lifting equipment 100 has a larger lifting operation range and improves the practicality of the lifting equipment 100.

The hoisting mechanism 32 is installed on the telescopic boom 31 or the platform 21 of the rotating platform 2, and the hoisting mechanism 32 includes a reel 321, a second motor 322 and a suspension rope 323. In this embodiment, the reel 321 is rotatably installed on the telescopic boom 31 around its own rotation axis, and the reel 321 is located at one end of the telescopic boom 31 hinged with the platform 21, and the rotation axis of the reel 321 is parallel to the hinge axis between the telescopic boom 31 and the platform 21. The second motor 322 is installed on the telescopic boom 31, and the suspension rope 323 is wound on the reel 321. The output shaft of the second motor 322 is connected to the reel 321 to drive the reel 321 to rotate, so as to realize the winding or release of the suspension rope 323; preferably, the suspension rope 323 is a steel wire rope.

The first driving mechanism 34 is used to drive the telescopic boom 31 to rotate relative to the platform 21 of the rotating platform 2, so that the telescopic boom 31 performs a pitching motion relative to the platform 21. Preferably, the first driving mechanism 34 adopts an oil cylinder, and the oil cylinder is hinged between the telescopic boom 31 and the rotating platform 2, so that the first driving mechanism 34 can stably and reliably drive the telescopic boom 31 to perform a pitching motion, so as to adapt to different working environments and meet different working requirements.

The first buffer mechanism 35 is installed on the extended end of the telescopic boom 31, and the rope 323 of the hoisting mechanism 32 passes around the extended end of the telescopic boom 31 and passes through the first buffer mechanism 35. The first buffer mechanism 35 is used to buffer the tension on the rope 323, so that when the hoisting mechanism 32 winds and recovers the rope 323, at the moment when the suspended object is lifted off the ground, the first buffer mechanism 35 can offset the excess tension on the rope 323 caused by the initial inertia of the suspended object, thereby preventing the rope 323 from being subjected to a large tearing force, effectively extending the service life of the rope 323.

5 , the first buffer mechanism 35 includes a box 351, a first pulley 352, a second pulley 353, a sliding member 354, an elastic member 355 and a reset unit 356. The box 351 is mounted on the telescopic end of the telescopic boom 31, and a slide groove 3511 is provided in the box 351, and the slide groove 3511 is along the first height direction of the box 351; of course, as another optional solution, in other embodiments, the slide groove 3511 may also extend along the second height direction of the vehicle body 1.

The first pulley 352 and the second pulley 353 are rotatably installed around their own rotation axes in the box 351, and the rotation axes of the first pulley 352 and the second pulley 353 are parallel to the hinge axis of the telescopic boom 31, and in the first height direction, the first pulley 352 is located above the second pulley 353.

The sliding member 354 is slidably connected to the slide groove 3511, and a third pulley 3541 is provided on the sliding member 354. The third pulley 3541 is located between the first pulley 352 and the second pulley 353, and the third pulley 3541 is offset and connected to the axis of the first pulley 352 and the second pulley 353; that is, in the first height direction, the third pulley 3541 is located below the first pulley 352, and the third pulley 3541 is located above the second pulley 353. When the suspension rope 323 passes through the first buffer mechanism 35, it meanders around the first pulley 352, the second pulley 353 and the third pulley 3541 in sequence, and the suspension rope 323 extends from the bottom of the box body 351 and is fixedly connected to the hook 33.

The elastic member 355 is connected between the box body 351 and the sliding member 354, and the elastic member 355 is used to force the sliding member 354 to move toward the top of the box body 351. The elastic member 355 preferably adopts a second compression spring, which is arranged between the slide slot 3511 and the sliding member 354; of course, as another optional solution, in the gas embodiment, the first tension spring can also be used to replace the second compression spring, the first tension spring is arranged above the slide slot 3511, and the first tension spring is connected between the sliding member 354 and the box body 351 to pull the sliding member 354 to slide toward the top of the box body 351.

6 , the reset unit 356 is installed at the bottom of the box 351, and the reset unit 356 preferably includes a guide rod 3561, two sliders 3562, an elastic component 3563, a sleeve 3564, and two connecting arms 3565. The bottom of the box 351 has two fixing blocks 3512, and the two fixing blocks 3512 are distributed in a direction parallel to the hinge axis of the telescopic boom 31. The first end of the guide rod 3561 is connected to the first fixing block 3512, and the second end of the guide rod 3561 is connected to the second fixing block 3512.

Both sliders 3562 are slidably mounted on the guide rod 3561, and the elastic assembly 3563 is used to force the two sliders 3562 to move toward each other. In the present embodiment, the elastic assembly 3563 includes two third compression springs, which are sleeved on the guide rod 3561, and one third compression spring is abutted between a fixed block 3512 and a slider 3562; of course, as another optional solution, in other embodiments, a second tension spring may be used to replace the two third compression springs, which is sleeved on the guide rod 3561 and connected between the two sliders 3562, so that the two sliders 3562 move toward each other.

The sleeve 3564 is sleeved on the suspension rope 323, and a connecting arm 3565 is hinged between a slider 3562 and the sleeve 3564, and the two connecting arms 3565 cooperate with the sleeve 3564 to force the two sliders 3562 to move in opposite directions. Since the rotating platform 2 drives the telescopic suspension arm 31 and the suspended object thereon to rotate when rotating, the suspended object drives the suspension rope 323 to swing roughly in the extension direction of the guide rod 3561, and the design of the reset unit 356 can effectively reduce the swing amplitude of the suspension rope 323, so as to shorten the swing time of the suspended object after the rotating platform 2 stops rotating, thereby reducing the installation or placement time of the suspended object, which is conducive to improving work efficiency.

The working process of the lifting device 100 is briefly described below in conjunction with FIGS. 1 to 6 :

When the lifting device 100 is working, it moves to the working area through the traveling mechanism of the vehicle body 1. Then, the second driving mechanism 22 drives the platform 21 to drive the hanging device 3 to rotate to the designated area. Then, the telescopic boom 31 of the hanging device 3 is extended or shortened, and the first driving mechanism 34 drives the telescopic boom 31 to rotate upward or downward to adjust the telescopic boom 31 to a suitable tilt angle so that the hook 33 is located above the object to be hung.

Next, the second motor 322 of the hoisting mechanism 32 drives the reel 321 to unwind the rope 323, so that the hook 33 moves to the object to be hoisted. Next, the hook 33 hooks the object to be hoisted or the ropes of the object to be hoisted; then, the second motor 322 of the hoisting mechanism 32 drives the reel 321 to rewind the rope 323, so that the hook 33 lifts the object to be hoisted.

When the hoisting mechanism 32 drives the hook 33 to lift the object, the pulling force generated by the hoisting mechanism 32 on the rope 323 is equal to the gravity of the object plus the inertia of the object. As the rope 323 is wound, the rope 323 presses down the sliding member 354 through the third pulley 3541 of the first buffer mechanism 35, so that the sliding member 354 moves to the bottom of the box 351 and compresses the elastic member 355 to store energy. At this time, the pressure on the elastic member 355 is the pulling force on the rope 323. At the moment before the suspended object leaves the ground, the force exerted by the elastic member 355 on the suspension rope 323 is still the sum of the gravity of the suspended object and its inertia force. When the suspended object leaves the ground, the tension on the suspension rope 323 suddenly decreases. At this time, the tension is the gravity of the suspended object. When the tension on the suspension rope 323 changes, the force exerted by the elastic member 355 on the suspension rope 323 changes slowly, so that the stress of the suspension rope 323 decreases slowly to offset the excess tension on the suspension rope 323 caused by the initial inertia of the suspended object, thereby avoiding the suspension rope 323 from being subjected to a large tearing force due to the stress changing in a very short time, avoiding damage to the suspension rope 323 and extending the service life of the suspension rope 323.

Next, the second driving mechanism 22 drives the platform 21 to drive the hoisting device 3 and the suspended object to rotate to the designated position; then, the hoisting mechanism 32 unwinds the hoisting rope 323, so that the suspended object is lowered to the designated position for installation or placement.

Among them, when the second driving mechanism 22 stops driving the platform 21, under the action of inertia, the telescopic boom 31 and the suspended object thereon will still drive the platform 21 to rotate; at this time, the driving block 2312 on the rotating shaft 231 of the second buffer mechanism 23 and the transmission block 2321 on the connecting seat 232 will force the elastic damping member 233 to deform, so that the elastic damping member 233 increases the resistance to the movement of the telescopic boom 31, and the telescopic arm will also drive the suspension rope 323 to decelerate, so as to reduce the inertia force of the suspended object and stop the suspended object from moving in a very short time. At the same time, due to the inertia of the suspended object, it will drive the suspension rope 323 to continue to swing, and the swinging suspension rope 323 will drive the sleeve 3564 of the reset unit 356 to move; at this time, the sleeve 3564 drives the slider 3562 to slide relative to the guide rod 3561 through the connecting arm 3565, so that the slider 3562 squeezes the third compression spring (or stretches the second tension spring). Under the action of the elastic potential energy of the elastic component 3563, the third compression spring (or stretches the second tension spring) will drive the sleeve 3564 back to its original position, thereby making the suspension rope 323 return to its original position, so as to reduce the swing amplitude of the suspension rope 323, thereby further shortening the installation or placement time of the suspended object. When the telescopic boom 31 stops moving, the elastic damping member 233 will drive the telescopic boom 31 and the platform 21 to rotate. However, at this time, the inertia force of the telescopic boom 31 and the suspended object is relatively small. Under the influence of the elastic damping member 233, air resistance and the reset unit 356, the suspended object can stop moving in a short time without swinging repeatedly, thereby effectively shortening the installation or placement time of the suspended object and improving work efficiency.

In summary, it can be seen that the lifting device 100 provided by the utility model can extend the service life of the lifting rope 323 and shorten the installation or placement time of the lifted object.

Finally, it should be emphasized that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims (10)

1. A lifting apparatus comprising:

A vehicle body;

a rotating table rotatably mounted on the vehicle body;

The lifting device comprises a telescopic boom, a hoisting mechanism, a lifting hook and a first driving mechanism, wherein the telescopic boom is hinged with the rotating table, the hoisting mechanism is arranged on the telescopic boom or the rotating table, a lifting rope of the hoisting mechanism bypasses the extending tail end of the telescopic boom, the lifting hook is connected with the free end of the lifting rope, and the first driving mechanism drives the telescopic boom to rotate relative to the rotating table;

the method is characterized in that:

The lifting device further comprises a first buffer mechanism, the first buffer mechanism is arranged at the extending end, the lifting rope penetrates through the first buffer mechanism, and the first buffer mechanism is used for buffering the tensile force borne by the lifting rope.

2. Hoisting device according to claim 1, characterized in that:

the first buffer mechanism includes:

the box body is internally provided with a sliding groove, and the sliding groove extends along the first height direction of the box body or the second height direction of the car body;

The first pulley and the second pulley are respectively rotatably arranged in the box body around the rotation axis of the first pulley and the second pulley;

The sliding piece is slidably connected with the sliding groove, a third pulley is arranged on the sliding piece, the third pulley is positioned on the lower side of the first pulley and the lower side of the second pulley in the first height direction, and the lifting rope sequentially bypasses the first pulley, the second pulley and the third pulley and stretches out from the bottom of the box body;

And the elastic piece forces the sliding piece to move towards the top of the box body.

3. Hoisting device according to claim 2, characterized in that:

The first buffer mechanism also comprises a reset unit, the reset unit is positioned at the bottom of the box body, and the reset unit comprises:

the guide rod is arranged on the box body and is parallel to the hinge shaft of the telescopic boom;

The two sliding blocks are slidably arranged on the guide rod;

The elastic component forces the two sliding blocks to move towards each other;

the sleeve is sleeved on the lifting rope;

The two connecting arms are hinged between one sliding block and the sleeve, and the two connecting arms are matched with the sleeve to force the two sliding blocks to move oppositely.

4. Hoisting device according to claim 1, characterized in that:

the rotating table includes:

The telescopic boom is hinged with the table body;

The second driving mechanism can drive the table body to rotate;

The second buffer mechanism is connected between the table body and the second driving mechanism and is used for buffering rotation inertia borne by the table body and the telescopic boom.

5. Hoisting device according to claim 4, characterized in that:

The second buffer mechanism includes:

The rotating shaft is rotatably connected with the vehicle body around the axis of the rotating shaft, the rotating shaft is provided with a plate part, a plurality of driving blocks are arranged at the top of the plate part, and the second driving mechanism drives the rotating shaft to rotate;

The connecting seat, the stage body is installed on the connecting seat, the bottom of connecting seat is equipped with the polylith transmission piece, polylith the transmission piece with the polylith the drive piece is around the alternate distribution of pivot is adjacent setting the transmission piece with be equipped with elastic damping spare between the drive piece, elastic damping spare hinders the transmission piece with the drive piece is around pivot relative rotation.

6. Hoisting device according to claim 5, characterized in that:

The two ends of the elastic damping piece are respectively provided with a connecting piece, one of the two connecting pieces is connected with the driving block in a spherical hinge manner, and the other of the two connecting pieces is connected with the driving block in a spherical hinge manner.

7. Hoisting device according to claim 5, characterized in that:

The rotating shaft penetrates through the plate part, and the rotating shaft is rotatably connected with the connecting seat around the axis of the rotating shaft.

8. Hoisting device according to claim 5, characterized in that:

The second driving mechanism includes:

a first motor mounted on the vehicle body;

The input end of the gear set is connected with the output shaft of the first motor, and the output end of the gear set is connected with the rotating shaft.

9. Hoisting device according to any one of claims 1 to 8, characterized in that:

the telescopic boom is a multi-stage telescopic boom;

the first driving mechanism is an oil cylinder, and the oil cylinder is hinged between the telescopic boom and the rotating table.

10. Hoisting device according to any one of claims 1 to 8, characterized in that:

the vehicle body is provided with a travelling wheel mechanism or a crawler mechanism.