CN108706465B - Double-chain type crane - Google Patents

Abstract

The invention provides a double-chain crane, wherein a transmission module is a ratchet wheel type chain wheel double-chain transmission module and is fixed on a metal frame through a bearing, and a direct current motor for providing power for the transmission module is arranged laterally of the transmission module; the turning advancing device is arranged at the bottom of the metal frame, a stepping motor for providing power for the turning advancing device is connected to the turning advancing device, a remote control module is also connected to the turning advancing device, and a crane operator controls the stepping motor and the direct current motor through the remote control module; the rotary straight plate hook comprises a plate-shaped hoisting part, a long shaft and a short shaft, wherein the long shaft and the short shaft are respectively fixedly connected with the transmission module chain, the hoisting part is in clearance fit with the short shaft and is in rotary connection, a sliding block in clearance fit is sleeved on the hoisting part, and the long shaft is in clearance fit with the sliding block and is in rotary connection. The invention combines the mechanical principle of crane transmission with the electronic technology, has higher automation degree and convenient movement, thereby improving the working efficiency.

Description

A double chain crane

technical field

The invention belongs to the field of lifting machinery, in particular to a double chain type crane.

Background technique

With the improvement of the requirements for port logistics machinery, the port has higher requirements for the safety, reliability and stability of hoisting machinery, and domestic hoisting machinery is developing towards automation and specialization. Chinese hoisting machinery enterprises have been able to independently innovate existing technologies and develop personalized products that meet the needs of domestic and foreign markets. Up to now, there are more than 1,000 types of products in my country's hoisting machinery industry, and new hoisting machinery and equipment are constantly coming out. However, on the existing basis, there is still a lot of room for improvement. There is still a lot of room for improvement in many aspects, such as how to improve the working efficiency of cranes, how to reduce the use of space resources, and how to make the working process more safe and reliable.

Based on the above background, crane manufacturing has gradually become more intelligent, and some new cranes have emerged as the times require. However, the operation of the existing cranes is mostly controlled manually by excellent crane drivers, and the transportation methods are mostly stacked one by one after translational transportation. This means that the current lifting operation has the disadvantages of high operation requirements and low work efficiency.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a double chain type crane, which can improve the work efficiency in the operation of transporting and stacking the lifted objects in a translational manner.

The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a double chain type crane, which is characterized in that: it includes a metal frame, a transmission module, a slewing straight hook and a direction-changing travel device; wherein, the transmission module is a ratchet chain The wheel and double chain transmission module is fixed on the metal frame through bearings, and the side of the transmission module is provided with a DC motor that provides power for the transmission module;

The direction-changing traveling device is arranged at the bottom of the metal frame, the direction-changing traveling device is connected with a stepping motor that provides power for it, and the direction-changing traveling device is also connected with a remote control module. Control of incoming motor and DC motor;

The slewing straight hook includes a plate-shaped hoisting part, a long shaft and a short shaft, wherein the long shaft and the short shaft are respectively fixedly connected with the transmission module chain; For the matched slider, the long shaft and the slider are in clearance fit and rotationally connected.

According to the above solution, the metal frame is provided with two limit plates, one of which is located in the front of the metal frame, and the other is located in the middle of the metal frame, the transmission module is fixed at the rear of the metal frame, and the front The front of the movement for the crane to lift the object.

According to the above solution, the metal frame includes a square frame at the top, and four pillars fixedly connected with the four corners of the square frame.

According to the above solution, the ratchet-type sprocket double-chain transmission module includes two groups of transmission mechanisms with the same structure, each group of transmission mechanisms includes one upper and lower two chain wheels connected by the first chain, and each chain wheel is equipped with a Coaxial small ratchet sprockets, two small ratchet sprockets are connected by a second chain, the sprockets of the upper two groups of transmission mechanisms and the small ratchet sprockets are connected by a driving shaft, and the driving shaft is connected with the DC The motor is connected, and the sprockets and the small ratchet-type sprockets of the two sets of transmission mechanisms located below are connected through a driven shaft, and the driven shaft is connected with the metal frame through a bearing.

According to the above scheme, there is interference fit between the sprocket and the drive shaft, and the small ratchet-type sprocket is connected to the drive shaft through a bearing.

According to the above solution, the direction-changing traveling device includes a pair of left-handed Mecanum wheels and a pair of right-handed Mecanum wheels, and each Mecanum wheel is equipped with one of the stepping motors.

The beneficial effects of the invention are: by combining the mechanical principle of crane transmission with electronic technology, the degree of automation is high, the movement is convenient, the transportation form is efficient and novel, the function of lifting and stacking goods before translational transportation is realized, and the transportation is improved. Efficiency: The crane adds a remote control module, which reduces the work tasks of the crane driver and improves the accuracy and efficiency of transportation. It can be widely used in working environments that need to be prepared for transportation and stacking, such as the stacking of port containers and the stacking of common warehouse goods. It is suitable for the development needs of cranes and the needs of social work environment.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention.

FIG. 2 is a schematic diagram of a metal frame according to an embodiment of the present invention.

FIG. 3 is a schematic diagram of a limiting plate according to an embodiment of the present invention.

FIG. 4 is a schematic diagram of a transmission module according to an embodiment of the present invention.

FIG. 5 is a schematic diagram of a rotary straight plate hook according to an embodiment of the present invention.

In the picture: 1-metal frame, 2-limiting plate, 3-transmission module, 4-slewing straight hook, 5-direction-changing travel device, 6-remote control module, 101-square tube, 102-pillar, 301-driven shaft, 302- drive shaft, 303-first sprocket, 304-first small ratchet sprocket, 305-second sprocket, 306-second small ratchet sprocket, 307-first chain, 308-th Two chains, 309-bearing, 401-lifting parts, 402-long shaft, 403-short shaft, 404-slider.

Detailed ways

The present invention will be further described below with reference to specific examples and accompanying drawings.

The present invention provides a double chain crane, as shown in FIG. 1 , which includes a metal frame 1 , a transmission module 3 , a slewing straight hook 4 and a direction-changing traveling device 5 .

As shown in FIG. 2 , the metal frame 1 includes a square frame at the top, and four pillars 102 fixedly connected with the four corners of the square frame. In this embodiment, the square frame is formed by welding four square tubes 101 cut at an angle of 45 degrees, and the four corners of the square frame and the lower four pillars 102 are connected by welding. The square frame is placed horizontally, and the pillar 102 is composed of 4 square tubes placed vertically.

As shown in FIG. 1 and FIG. 3 , the metal frame 1 is provided with two rectangular, wooden limit plates 2 . One of them is placed in front of the metal frame 1 through bolts. When the lifting object is put down, it can effectively limit the distance that the object slides forward, so that the lifted object will first hit the limit plate 2 and then slide down. The limit plate 2 There is a certain distance between the bottom and the ground to ensure that the equipment can make the lifted object reach the lifting position during the traveling process. The other piece is placed in the middle of the metal frame 2 through bolts, the transmission module 3 is fixed at the rear of the metal frame 1, and the front is the front of the movement of the object lifted by the crane. Therefore, the limit plate 2 in the middle is close to the transmission module 3, which can effectively reduce the deformation of the transmission module 3 due to the bending moment caused by the gravity of the lifted object during the lifting process, and increase the stability of the structure.

As shown in FIG. 1 and FIG. 4 , the transmission module 3 is a ratchet-type sprocket and double chain transmission module, which is fixed on the metal frame through bearings. The side of the transmission module 3 is provided with a DC motor that provides power for the transmission module 3 . The ratchet-type sprocket double-chain transmission module includes two groups of transmission mechanisms with the same structure. Each sprocket is provided with a coaxial small ratchet sprocket, namely a first small ratchet sprocket 304 and a second small ratchet sprocket 306, and the two small ratchet sprockets are connected by a second chain 308, located at The first sprocket 303 and the first small ratchet sprocket 304 of the upper two sets of transmission mechanisms are connected by a driving shaft 302, which is connected to the DC motor, and the second sprockets of the lower two sets of transmission mechanisms are connected by a driving shaft 302. 305 and the second small ratchet-type sprocket 306 are connected through a driven shaft 301, and the driven shaft 301 is connected with the metal frame 1 through a bearing. There is an interference fit between the sprocket and the driven shaft 301 of the driving shaft 302 , and the small ratchet-type sprocket is connected to the driven shaft 301 of the driving shaft 302 through a bearing 309 .

When lifting the object, the two first sprockets 303 matched with the driving shaft 302 , the two first small ratchet-type sprockets 304 matched with the driving shaft 302 , and the two second sprockets 304 matched with the driven shaft 301 The sprocket 305 and the two small ratchet sprockets 306 matched with the driven shaft 301 can be rotated under the action of the first chain 307 and the second chain 308. When the object is put down, the first small ratchet sprocket 304 The second small ratchet-type sprocket 306 does not rotate under the action of the ratchet, and is used in combination with the rotary straight hook 4 to realize the lifting and lowering of objects.

The direction-changing traveling device 5 is disposed at the bottom of the metal frame 1 , the direction-changing traveling device 5 is connected with a stepping motor that provides power for it, and the direction-changing traveling device 5 is also connected with a remote control module 6 . The crane operator can control the stepper motor and DC motor through the remote control module. The changing-direction traveling device 5 includes a pair of left-handed Mecanum wheels and a pair of right-handed Mecanum wheels, each of which is equipped with a stepping motor. When the machine is in motion, the operator issues an instruction to the remote control module 6 through the remote control, and the remote control module 6 controls the corresponding motor to output torque according to the command through the steps of command acceptance-command analysis-command execution. Among them, the linear motors located on both sides of the metal frame 1 control the movement of the transmission module 3 to realize the lifting and stacking of goods; the 4 stepping motors that control the movement of the direction-changing traveling device 5 realize the horizontal movement of the machine. The DC motor ensures the torque required in the process of lifting the goods; the stepper motor can overcome the errors caused by the unstable output power and asynchrony of the motor during the traveling process.

As shown in FIG. 5 , the slewing straight hook 4 includes a plate-shaped hoisting part 401 , a long shaft 402 and a short shaft 403 , wherein the long shaft 402 and the short shaft 403 are respectively fixedly connected with the chain of the transmission module 3 , and the hoisting part 401 With the short shaft 403 in clearance fit and rotational connection, the hoisting part 401 is sleeved with a clearance fit slider 404 , and the long shaft 402 and the slider 404 are clearance fit and rotationally connected. This embodiment is provided with five rotary straight hooks 4, which are respectively connected to the pins of the chain by welding, and move synchronously with the movement of the chain, so as to achieve the purpose of lifting the goods. Specifically, the long axis 402 and the short axis 403 are connected to the pins of the chain in the transmission module 3 by welding, and the hoisting component 401 and the short axis 403 are in clearance fit, and the two can rotate with each other, so as to realize the dropping of the box and the lifting of the box. The component 401 and the slider 404 are in clearance fit, and the slider 404 plays a supporting role to realize the lifting of the hoisted object. In the process of hoisting the object, under the support of the slider 404 , the hoisting of the hoisting object is realized in cooperation with the transmission module 3 . During the process of putting down the object, the lifting component 401 is inclined downward in coordination with the movement of the transmission module 3 so as to realize the falling of the lifted object.

In this embodiment, the remote control module 6 uses C51 as a microcontroller, and connects the sensor, Bluetooth module, stepper motor drive board, stepper motor, DC motor, etc. to the C51 main control board for control. By reading the data on each device and processing it, the chain slewing crane is semi-automatically controlled to achieve high-precision operation.

In this embodiment, the mechanical combination and the control of the single-chip microcomputer are integrated into a whole to complete the work flow of the entire chain rotary crane. The chain slewing crane realizes the position change of the machine in space through the variable-direction traveling device 5 composed of four Mecanum wheels, and accurately reaches the target area. The chain drive module cooperates with the rotary straight plate hook 4 to realize the lifting and stacking of the goods. After reaching the target position, the rotary straight plate hook and the double chain transmission module of the ratchet type sprocket cooperate with each other to realize the falling and stacking of the goods.

The variable-direction traveling device 5 is controlled by stepper motors fixed on both sides of the wheel to control different output directions and rotational speeds to realize multi-directional movement of the machine. After traveling to the destination area, the ratchet-type sprocket double-chain transmission module cooperates with the work of the rotary straight hook 4 to realize the stacking of the goods. The design of a plurality of rotary straight hooks 4 can successively hook the goods arranged in the same straight line and stack them in a row on the vertical plane.

The working sequence steps of this embodiment are as follows:

The machine starts and starts to work. The operator sends the command of the machine to move forward and the ratchet-type sprocket double-chain transmission module to rotate through the remote control module 6. The bottom rotary straight hook 4 reaches the horizontal position and hooks the first cargo. The ratchet-type sprocket double-chain transmission module continues to rotate, and the second rotary straight hook 4 below reaches the horizontal position, and hooks the second cargo. Until all the goods in the same row are hooked, the goods have been stacked.

The bottom changing direction traveling device 5 starts to work, and stops moving after reaching the target area.

The ratchet-type sprocket double-chain transmission module rotates in the opposite direction, and the movement of the rotary straight hook 4 is used to realize the falling and stacking of all the goods in turn, and then the five rotary straight hooks are returned to their positions.

Repeat the above operations to achieve the final transportation task of all goods.

The double chain crane of the present invention improves the work efficiency, liberates the labor force, and guarantees the health of the driver to a certain extent by replacing the manual operation with high working intensity and poor working environment with a machine.

The above embodiments are only used to illustrate the design ideas and features of the present invention, and the purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly, and the protection scope of the present invention is not limited to the above embodiments. Therefore, all equivalent changes or modifications made according to the principles and design ideas disclosed in the present invention fall within the protection scope of the present invention.

Claims (4)

1. a double chain type crane is characterized in that: it comprises a metal frame, a transmission module, a rotary straight hook and a direction-changing travel device; wherein, the transmission module is a ratchet-type sprocket double-chain transmission module, which is fixed on the metal frame by a bearing. On the side of the transmission module, there is a DC motor that provides power for the transmission module; The direction-changing traveling device is arranged at the bottom of the metal frame, the direction-changing traveling device is connected with a stepping motor that provides power for it, and the direction-changing traveling device is also connected with a remote control module. Control of incoming motor and DC motor; The slewing straight hook includes a plate-shaped hoisting part, a long shaft and a short shaft, wherein the long shaft and the short shaft are respectively fixedly connected with the transmission module chain; The matching slider, the long shaft and the slider are gap-fitted and rotationally connected; The ratchet-type sprocket double-chain transmission module includes two groups of transmission mechanisms with the same structure, each group of transmission mechanisms includes one upper and lower two chain wheels connected by the first chain, and each chain wheel is equipped with a coaxial small Ratchet-type sprocket, the two small ratchet-type sprockets are connected by the second chain, the sprockets of the upper two sets of transmission mechanisms and the small ratchet-type sprocket are connected by the driving shaft, and the driving shaft is connected with the DC motor, located in the The sprockets of the lower two sets of transmission mechanisms and the small ratchet sprocket are connected by the driven shaft, and the driven shaft is connected with the metal frame through the bearing; the interference fit between the sprocket and the driving shaft, the small ratchet sprocket It is connected with the drive shaft through a bearing. 2. The double chain crane according to claim 1, characterized in that: the metal frame is provided with two limit plates, one of which is located in front of the metal frame, and the other is located in the middle of the metal frame, the The transmission module is fixed at the rear of the metal frame, and the front is the front of the moving object lifted by the crane. 3 . The double chain crane according to claim 1 , wherein the metal frame comprises a square frame at the top, and four pillars fixedly connected to the four corners of the square frame. 4 . 4. The double chain crane according to claim 1, characterized in that: the changing direction traveling device comprises a pair of left-handed Mecanum wheels and a pair of right-handed Mecanum wheels, each Mecanum wheel The wheel is equipped with a said stepper motor.

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