CN114044437B

CN114044437B - Crane hook buffer device

Info

Publication number: CN114044437B
Application number: CN202111493437.XA
Authority: CN
Inventors: 冀迪
Original assignee: Fourth Construction Co Ltd Of China Railway Construction Engineering Group
Current assignee: Fourth Construction Co Ltd Of China Railway Construction Engineering Group
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2023-07-14
Anticipated expiration: 2041-12-08
Also published as: CN114044437A

Abstract

The invention relates to a crane hook buffer device, which effectively solves the problem of continuous deformation of a spring during lifting and buffering; the technical scheme is that the device comprises a bottom plate which is horizontally arranged, a plurality of vertical rods are uniformly distributed on the bottom plate, and a horizontal middle plate and an upper plate are penetrated through the plurality of vertical rods; a tension spring positioned between the bottom plate and the middle plate is sleeved on each vertical plate; the upper end of each vertical rod is in threaded connection with an adjusting nut; the bottom plate is connected with a lifting hook, and a hanging rod penetrating through the upper plate is fixed in the middle of the upper plate; the interior of the suspender is hollow; the lower end of the suspender is provided with two radial limit pins which can move left and right; the inner end of each limit pin is provided with an inclined surface which inclines downwards; a vertical shell is fixed on the bottom plate, and a push rod capable of resetting upwards is arranged in the shell; the ejector rod can be arranged in the suspender and extrudes the left limit pin and the right limit pin, and after the lifting device is lifted, the device is automatically switched to be in rigid connection.

Description

Crane hook buffer device

Technical Field

The invention relates to the technical field of hoisting, in particular to a crane hook buffer device.

Background

The crane can generate a certain impact force due to the weight of the goods at the moment of hoisting, and can cause oscillation impact to the lifting hook, the support of the crane and the goods. In order to avoid impact force at the moment of lifting, most of the prior art is additionally provided with a buffer, the buffer is generally buffered by a spring, and direct impact is avoided by deformation energy absorption of the spring. However, there is a general problem with the buffers currently available on the market. Because the buffering is mainly used for buffering the lifting moment, the whole lifting process does not need buffering, and after the spring in the buffer is stretched or compressed at the lifting moment, the spring still keeps an stretched or compressed state in the whole lifting process, so that the working time of the spring can be prolonged. The elasticity and strength of the spring can be reduced for a long time, the effect is lost, and the lifting risk is generated.

In addition, in part of the hoisting process, the lowered goods need to be accurately aligned, for example, a buffer works all the time, so that the goods are easy to vibrate, and the alignment operation is not facilitated; the existing buffering is not designed with different buffering forces for different cargo weights.

Disclosure of Invention

Aiming at the situation, the invention aims to solve the problems in the prior art and provide the crane hook buffer device which can effectively solve the problem that the spring is continuously deformed during hoisting buffer.

The technical scheme is that the device comprises a bottom plate which is horizontally arranged, a plurality of vertical rods are uniformly distributed on the bottom plate, and a horizontal middle plate and an upper plate are penetrated through the plurality of vertical rods; a tension spring positioned between the bottom plate and the middle plate is sleeved on each vertical plate; the upper end of each vertical rod is in threaded connection with an adjusting nut; the bottom plate is connected with a lifting hook, and a hanging rod penetrating through the upper plate is fixed in the middle of the upper plate;

the interior of the suspender is hollow; the lower end of the suspender is provided with two radial limit pins which can move left and right; the inner end of each limit pin is provided with an inclined surface which inclines downwards; a vertical shell is fixed on the bottom plate, and a push rod capable of resetting upwards is arranged in the shell; the ejector rod can be arranged in the suspender and extrudes the left limit pin and the right limit pin;

the middle plate is provided with a center hole corresponding to the suspender; fixing blocks are symmetrically arranged on the upper side and the lower side of the central hole; the fixed block is internally provided with a conical hole, and the small end of the conical hole corresponds to the central hole.

The upper end of the suspender is fixed with a suspension ring.

A pressure spring is connected between the ejector rod and the bottom of the shell; the lower end of the ejector rod is provided with a limiting bulge; the limiting bulge ensures that the ejector rod is not separated from the shell after upwards moving; the upper end of the ejector rod is a cambered surface.

The lower end of the ejector rod is connected with a rope, and the free end of the rope penetrates through the bottom of the shell and is connected with a pull ring.

The ejector rod is formed by connecting multiple sections of screws, and different lengths of the ejector rod can be adjusted by adjusting the number of the sections.

The invention has the following advantages: 1. after hoisting, automatically switching to rigid connection; after the buffering operation, the tension spring is automatically reset, the service life of the tension spring is prolonged, and the vibration below the tension spring is reduced.

2. The operation is convenient, the unordered intervention of hoisting process, and during the reset, the stay cord pushes down can.

3. The buffer strength adjusting device is convenient to adjust, and can select buffer strength of different degrees according to cargoes of different weights.

4. The alignment operation is convenient when the weight is put down, for example, the swinging is reduced when the prefabricated wall is in butt joint with the ground reinforcing steel bar joint.

Drawings

Fig. 1 is a front view (initial state) of the present invention.

Fig. 2 is a front sectional view (initial state) of the present invention.

Fig. 3 is a front cross-sectional view of the present invention (lifted to a disengaged condition).

Fig. 4 is a front cross-sectional view (fully lifted) of the present invention.

Fig. 5 is a front view in cross section (boom down state) of the present invention.

Fig. 6 is an enlarged view of a portion of fig. 3 a in accordance with the present invention.

Detailed Description

The following describes the embodiments of the present invention in further detail with reference to the drawings.

As shown in fig. 1 to 6, the invention comprises a bottom plate 1 which is horizontally arranged, a plurality of vertical rods 2 are uniformly distributed on the bottom plate 1, and a horizontal middle plate 3 and an upper plate 4 are penetrated on the plurality of vertical rods 2; each vertical plate is sleeved with a tension spring 5 positioned between the bottom plate 1 and the middle plate 3; the upper end of each vertical rod 2 is in threaded connection with an adjusting nut 6; the bottom plate 1 is connected with a lifting hook 7, and a hanging rod 8 penetrating through the upper plate 4 is fixed in the middle of the upper plate 4;

the interior of the suspender 8 is hollow; two radial limit pins 10 are arranged at the lower end of the suspender 8, and the limit pins 10 can move left and right; the inner end of each limit pin 10 is provided with an inclined surface which inclines downwards; a vertical shell 11 is fixed on the bottom plate 1, and a push rod 12 capable of resetting upwards is arranged in the shell 11; the ejector rod 12 can be arranged in the suspender 8 and presses the left limit pin 10 and the right limit pin 10;

the middle plate 3 is provided with a center hole 13 corresponding to the suspender 8; the upper and lower sides of the central hole 13 are symmetrically provided with fixed blocks 14; the fixed block 14 is internally provided with a conical hole 15, and the small end of the conical hole 15 corresponds to the central hole 13.

In order to facilitate lifting, a lifting ring 9 is fixed at the upper end of the lifting rod 8.

In order to realize upward resetting of the ejector rod 12 and facilitate extrusion, a pressure spring 16 is connected between the ejector rod 12 and the bottom of the shell 11; the lower end of the ejector rod 12 is provided with a limiting bulge; the limiting bulge ensures that the ejector rod 12 is not separated from the shell 11 after upwards moving; the upper end of the ejector rod 12 is a cambered surface.

In order to facilitate the resetting, the lower end of the ejector rod 12 is connected with a rope 17, and the free end of the rope 17 passes through the bottom of the shell 11 and is connected with a pull ring 18.

Different buffering forces are provided for conveniently corresponding to different degrees of goods; the ejector rod 12 is formed by connecting multiple sections of screws, and different lengths of the ejector rod 12 can be adjusted by adjusting the number of the sections.

When the crane is used, the steel rope of the crane is fixedly connected with the hanging ring 9 in the crane; the hook 7 in the device is used for hooking the goods; meanwhile, the device is utilized to play a role in buffering and protecting.

Prior to lifting, see fig. 1 and 2; at this time, the middle plate 3 keeps a small space with the bottom plate 1 under the action of the tension spring 5; while also a reduced spacing remains between the upper plate 4 and the intermediate plate 3. In this state, the boom 8 will pass through the middle plate 3, and the ejector rod 12 will be placed inside the boom 8, so that the left and right limiting pins 10 in the boom 8 are in an extended state, and the left and right limiting pins 10 are in the lower fixing block 14. Since the limit pin 10 cannot be contracted, when the boom 8 is pulled upward, the limit pin 10 cannot pass through the center hole 13 of the intermediate plate 3.

In the initial state, the suspender 8 and the middle plate 3 rise together, so that when the goods are hoisted, the tension springs 5 between the middle plate 3 and the bottom plate 1 are lengthened, and then the bottom plate 1 and the lifting hooks 7 are acted on, so that the buffering effect is realized. I.e. the states of fig. 2 to 3.

After being stretched to a certain extent, referring to fig. 3, the ejector rod 12 is limited in length and cannot be separated from the shell 11 to move upwards independently; therefore, the middle plate 3 and the suspender 8 are lifted together until the ejector rod 12 is separated from the left pin and the right pin; when the limit pin 10 is not supported by the ejector rod 12, the limit pin 10 can be reset inwards; at this time, the middle plate 3 has downward resetting power, so the conical hole 15 in the fixed block 14 positioned below can squeeze the left and right limit pins 10, so that the limit pins 10 are reset inwards; the intermediate plate 3 will continue to descend until the intermediate plate 3 returns to a state where a reduced space remains with the base plate 1.

Through the design of adjusting nut 6, through the regulation, make when ejector pin 12 breaks away from extrusion spacing pin 10, let top plate 4 just by adjusting nut 6 spacing, can not upwards move. Therefore, the state shown in fig. 4 is presented, namely, the upper plate 4 can realize the effect that the upper plate 4 directly pulls the bottom plate 1 through the limiting function of the adjusting nut 6. In this state, the tension spring 5 is reset and does not participate in the hoisting operation. The suspender 8 is equal to the strength of being directly and rigidly connected with the lifting hook 7 through the upper layer plate 4, the vertical rod 2 and the bottom plate 1, and the lifting is ensured.

In summary, according to the above process, when lifting, the tension spring 5 will be elongated first until the length of the tension spring 5 reaches the set length, and then the device will be switched automatically, so that the tension spring 5 is reset, and the lifting hook 7 is directly and rigidly connected to the lifting rod 8, thereby not only ensuring the lifting stability and strength, but also enabling the tension spring 5 to be separated from the whole lifting process after the action. The service life of the tension spring 5 is prolonged, and unnecessary vibration of goods is avoided.

For example, when a prefabricated wall is placed, the hole at the bottom of the wall body needs to be accurately butted with a reinforcing steel bar head on the ground, and if a buffer works all the time in the lower process, the wall body can vibrate, so that alignment is not facilitated; in the falling process, the buffer does not work, so that the alignment speed can be improved, and repeated bouncing is avoided.

Reset operation: after the hoisting is finished, the device needs to be reset to an initial state; i.e. from the state of fig. 4 to the initial state; when the lifting rod is reset, the rope 17 needs to be pulled to enable the lifting rod 12 to reset downwards, then the lifting rod 8 is pressed downwards, and at the moment, the lifting rod 12 presses the limit pin 10 in the lifting rod 8, so that the lifting rod 8 can easily pass through the middle plate 3; see the state described in fig. 5; when the limit pin 10 at the lower end of the suspender 8 is arranged in the lower fixed block 14; the upper plate 4 is kept still, the rope 17 is loosened, the ejector rod 12 is reset upwards, the ejector rod 12 is inserted into the suspender 8 again, and the limiting pin 10 is limited again; the whole device is restored to the original state.

If different degrees of buffering are needed for cargoes with different weights, the multisection part of the ejector rod 12 can be rotated; or controlling the ejector rods 12 with different sections to change the length of the ejector rods 12 and correspondingly adjusting the position of the adjusting nut 6, thereby quickly realizing the adjustment of the buffer force.

Claims

1. The crane hook buffer device comprises a bottom plate (1) which is horizontally arranged, and is characterized in that a plurality of vertical rods (2) are uniformly distributed on the bottom plate (1), and a horizontal middle plate (3) and an upper plate (4) are penetrated through the plurality of vertical rods (2); a tension spring (5) positioned between the bottom plate (1) and the middle plate (3) is sleeved on each vertical plate; the upper end of each vertical rod (2) is in threaded connection with an adjusting nut (6); a lifting hook (7) is connected to the bottom plate (1), and a hanging rod (8) penetrating through the upper plate (4) is fixed at the middle position of the upper plate (4);

the interior of the suspender (8) is hollow; two radial limit pins (10) are arranged at the lower end of the suspender (8), and the limit pins (10) can move left and right; the inner end of each limit pin (10) is provided with an inclined surface which inclines downwards; a vertical shell (11) is fixed on the bottom plate (1), and a push rod (12) capable of resetting upwards is arranged in the shell (11); the ejector rod (12) can be arranged in the suspender (8) and extrude the left limit pin (10) and the right limit pin (10);

the middle plate (3) is provided with a center hole (13) corresponding to the suspender (8); the upper side and the lower side of the central hole (13) are symmetrically provided with fixed blocks (14); a conical hole (15) is formed in the fixing block (14), and the small end of the conical hole (15) corresponds to the central hole (13).

2. A crane hook buffer device according to claim 1, characterized in that the upper end of the boom (8) is fixed with a lifting ring (9).

3. The crane hook buffer device according to claim 1, wherein a compression spring (16) is connected between the ejector rod (12) and the bottom of the shell (11); the lower end of the ejector rod (12) is provided with a limit bulge; the limiting bulge ensures that the ejector rod (12) is not separated from the shell (11) after upwards moving; the upper end of the ejector rod (12) is a cambered surface.

4. The crane hook buffer device according to claim 1, wherein the lower end of the ejector rod (12) is connected with a rope (17), and the free end of the rope (17) passes through the bottom of the shell (11) and is connected with a pull ring (8).

5. The crane hook buffer device according to claim 1, wherein the ejector rod (12) is formed by a plurality of sections of spiral connection, and different lengths of the ejector rod (12) can be adjusted by adjusting the number of sections.