阅读说明：本技术 一种移动式多功能装卸机滑移旋转驱动架 (Sliding rotary driving frame of movable multifunctional loading and unloading machine ) 是由 王永京 徐江亭 姜惠峰 李宏图 孔德顺 李杨 李世林 李泉 赵德永 贾涛 王敏 于 2021-09-30 设计创作，主要内容包括：为了从根本上解决工作效率低、成本高、货物损失率高和工人安全工作的问题,本发明专利公开了一种用于移动式多功能装卸机的滑移旋转驱动架,涉及袋装货物装卸技术领域。一种移动式多功能装卸机的滑移旋转驱动架包括支撑架、第一旋转装置、第二旋转装置、通过键连接转轴与滚轮、液压马达、与焊接在轴瓦上的液压马达支座、小齿轮、链条等。采用发动机带动整车移动,并为液压系统提供动力,在支撑架的前端配合连接第一旋转装置,在支撑架的后端配合连接第二旋转装置。支撑架下部安装转轴,转轴上两侧直径较中间细,使中间形成凸台精确定位安装轴套,转轴与滚轮安装好后的总长度与U槽轨道间内部长度相同,保证4个滚轮正常工作,安装液压马达一侧2个轴瓦与2个滚轮间的距离皆大于未安装液压马达一侧,从而为固定在转轴上的齿轮预留安装空间。(The invention discloses a sliding rotary driving frame for a movable multifunctional loading and unloading machine, and relates to the technical field of loading and unloading of bagged goods, in order to fundamentally solve the problems of low working efficiency, high cost, high goods loss rate and safe work of workers. A sliding rotary driving frame of a movable multifunctional loading and unloading machine comprises a supporting frame, a first rotating device, a second rotating device, a rotating shaft, rollers, a hydraulic motor support, a pinion, a chain and the like, wherein the rotating shaft and the rollers are connected through keys, and the hydraulic motor support, the pinion and the chain are welded on bearing bushes. The engine is adopted to drive the whole vehicle to move and provide power for the hydraulic system, the first rotating device is connected to the front end of the supporting frame in a matched mode, and the second rotating device is connected to the rear end of the supporting frame in a matched mode. The pivot is installed to support frame lower part, and both sides diameter is thinner than the centre in the pivot, makes the centre form boss accurate positioning installation axle sleeve, and the total length after pivot and gyro wheel have been installed is the same with inside length between the U groove track, guarantees that 4 gyro wheels normally work, and the distance between 2 axle bushes in installation hydraulic motor one side and 2 gyro wheels all is greater than on one side of not installing hydraulic motor to reserve installation space for fixing the epaxial gear of commentaries on classics.)

1. The utility model provides a rotatory drive frame that slides of portable multi-functional loader which characterized in that: comprises a support frame (1), a first rotating device (2) which is positioned at the front end of the support frame (1) and is connected with the support frame in a matching way, and a second rotating device (3) which is connected with the rear end of the support frame (1) in a matching way; the support frame (1) is formed by welding sectional materials, a large fixing plate (10) is welded on 4 end points of the lower end of the support frame (1) respectively and is connected with a small fixing plate (11) and a bearing bush (12) through bolts, the bearing bush (12) is connected with a shaft sleeve (14) in a clearance fit manner, the shaft sleeve (14) is connected with a rotating shaft (13) in an interference fit manner, the rotating shaft (13) is connected with a roller (7) through a key, a hydraulic motor (8) is fixedly connected with a hydraulic motor support (9) welded on the bearing bush (12) through a bolt, the output end of the hydraulic motor (8) is fixedly connected with a pinion (42) through a spline fit, the pinion (42) is meshed with a gear (6) fixed on the rotating shaft (13) through a key fit, the roller (7) is matched with a U-groove rail (60) which is laterally arranged and fixedly connected with a frame (41) through a compression roller side plate (43), and the hydraulic motor (8) drives the rotating shaft (13) to rotate through gear transmission, when the hydraulic motor (8) is driven, the support frame (1) is driven to move back and forth along the slide rail; the first rotating device (2) is provided with a first worm gear outer shell (22) which is fixedly matched with the front end of the support frame (1), a first fixing plate (21) of the feeding rotary supporting seat (4) is connected with the upper side of the first worm wheel (23) through a bolt, thereby realizing the fixed connection of the first rotating device (2) and the feeding rotating supporting seat (4), a first hydraulic motor (24) is arranged on a first worm gear shell (22) which is connected with the lower side of a first worm wheel (23) through a first bearing inner ring (26), a first worm (25) is connected to the output shaft of the first hydraulic motor (24), the first worm (25) is meshed with the first turbine (23), the first worm wheel (23) is driven to rotate, so that the first hydraulic motor (24) drives the first worm wheel (23) to rotate to drive the feeding rotary supporting seat (4) to rotate, and the first worm and gear shell (22) is fixedly connected with the first fixing plate (21) through bolts; the second rotating device (3) is provided with a second worm gear outer shell (32) which is fixedly matched with the rear end of the support frame (1), a second fixed plate (31) of the blanking rotary supporting seat (5) is connected with the upper side of the second worm wheel (33) through bolts, thereby realizing the fixed connection between the second rotating device (3) and the blanking rotating supporting seat (5), a second hydraulic motor (34) is arranged on a second worm gear shell (32) which is connected with the lower side of a second worm gear (33) through a second bearing inner ring (36), a second worm (35) is connected on the output shaft of the second hydraulic motor (34), the second worm (35) is meshed with the second turbine (33) to drive the second turbine (33) to rotate, so that the second hydraulic motor (34) drives the second turbine (33) to rotate to drive the blanking rotary supporting seat (5) to do rotary motion, and the second worm gear shell (32) is fixedly connected with the second fixing plate (31) through bolts.

2. The skid rotary drive carriage of a mobile multi-function loader of claim 1, further comprising: the structure of support frame (1) is narrow structure under for last length, and is formed by the section bar welding, and the size ratio of upper portion length and lower part length is about 5: 1, the upper length guarantees that the rotary support can enter the carriage, and the lower width guarantees that the support does not interfere with the carriage when the rotary support enters the carriage, so that the telescopic boom can completely enter the carriage and can rotate forward and backward by 90 degrees, and the loading and unloading of workers are facilitated.

3. The skid rotary drive carriage of a mobile multi-function loader of claim 1, further comprising: the structure of the feeding rotary support (4) is a grid structure, so that the material can be saved and the bearing capacity can be ensured; the blanking rotating support (5) is a hollow shell, process holes are reserved on the surface of the hollow shell, materials are saved, economical efficiency is guaranteed, and meanwhile installation and disassembly of bolts are facilitated.

4. The skid rotary drive carriage of a mobile multi-function loader of claim 1, further comprising: when the automatic feeding and discharging device is used, the engine is adopted to drive the whole vehicle to move, power is provided for the hydraulic system, the first rotating device (2) is connected to the front end of the support frame (1) in a matched mode, the second rotating device (3) is connected to the rear end of the support frame (1) in a matched mode, the feeding and conveying arm (15) is connected to the first rotating device (2) in a rotating mode, the discharging and conveying arm (17) is connected to the second rotating device (3) in a rotating mode, a hydraulic cylinder fixing seat is arranged at the front end of a rotating support in the first rotating device (2), the hydraulic cylinder fixing seat and a hydraulic cylinder are connected through a pin, the other end of the hydraulic cylinder is connected with the feeding and conveying arm through a pin, up-and-down swinging of the feeding and conveying arm can be achieved, and the same is achieved.

5. The skid rotary drive carriage of a mobile multi-function loader of claim 1, further comprising:

the diameters of the two sides of the rotating shaft (13) are thinner than the diameter of the middle of the rotating shaft, so that a boss accurate positioning installation shaft sleeve (14) is formed in the middle of the rotating shaft, the total length of the rotating shaft (13) and the roller (7) after installation is the same as the length of the inner part of the U-shaped groove track (60), 4 rollers (7) are guaranteed to normally work, the distance between 2 bearing bushes (12) on one side of the installation hydraulic motor (8) and 2 rollers (7) is larger than that on one side of the non-installation hydraulic motor (8), and therefore the installation space is reserved for the gear (6) fixed on the rotating shaft (13).

6. The skid rotary drive carriage of a mobile multi-function loader of claim 1, further comprising:

the lower end of the support frame (1) is provided with a chain wheel (62) and a pressing strip (65), the chain wheel (62) is positioned at the other side of a rotating shaft (13) provided with a gear (6) at the tail side, a bearing roller supporting seat (64) is fixed on a cross beam at the lower side of the tail side sliding and rotating support frame (1) through a bolt, one end of the chain (61) is fixed on a moving frame cross beam at the head side, the chain passes through a bearing roller (63) from the upper side and is meshed and connected with the chain wheel (62), the other end of the chain is fixed on the moving frame cross beam at the tail side, the chain (62) is meshed and connected with the chain (61) to ensure that the sliding and rotating driving frame can complete braking, the chain cannot slide towards the moving direction after the hydraulic motor stops driving due to inertial force, the functions of uniform stress and ensuring the stable sliding of the support frame (1) are achieved, one end of the pressing strip (65) is fixed with the frame (41), the other end of the chain is connected with the rear end of the support frame (1), and the internal connection of a circuit and the support frame (1) is arranged inside, the layering (65) protect the circuit not receive the damage and drive the circuit safety removal in the time, can the steady support frame (1), avoid the flexible arm of material loading and the flexible arm of unloading to the incline of the rotatory support frame that slides that leads to when equidirectional horizontal rotation 90 simultaneously, keep the stability of whole rotatory drive frame that slides.

Technical Field

The invention relates to the technical field of loading and unloading of bagged goods, in particular to a sliding rotary driving frame for a train goods loader and unloader.

Background

The prior bagged goods, such as various bagged grains, building materials, medicinal materials, chemical products and the like, are required to be bagged for transportation and storage. In the process of carrying the bagged goods between the train and the truck, a plurality of areas still carry the bagged goods and stack the bagged goods by manually, a large amount of labor force in the young and the old is wasted, the physical strength of workers is consumed, the working efficiency is low, the physical health of the workers is seriously threatened, the production efficiency is not favorably improved, the cost of the labor resources in recent years is increased year by year, the shortage of the labor force resources in the young and the old often causes the problem of insufficient labor force, and the transportation efficiency of the goods is greatly influenced. In order to fundamentally solve the problems of low working efficiency, high cost, high cargo loss rate and safe work of workers, the applicant designs a movable multifunctional loader, and the movable multifunctional loader is a sliding rotary driving frame.

Disclosure of Invention

The invention aims to provide a sliding and rotating driving frame for a movable multifunctional loading and unloading machine, which aims at solving the problems that the labor intensity is high, the cargo loss is high, the health of workers cannot be guaranteed and the working efficiency is low in manual carrying when a train loads and unloads bagged cargos at the present stage.

A sliding rotation driving frame of a movable multifunctional loading and unloading machine comprises a supporting frame, a first rotating device and a second rotating device, wherein the first rotating device is positioned at the front end of the supporting frame and is in matched connection with the supporting frame; the support frame is formed by welding sectional materials, 4 end points at the lower end of the support frame are respectively welded with a large fixing plate which is connected with a small fixing plate and a bearing bush through bolts, the bearing bush is in clearance fit connection with a shaft sleeve, the shaft sleeve is in interference fit connection with a rotating shaft, the rotating shaft is in key connection with an idler wheel, a hydraulic motor is fixedly connected with a hydraulic motor support bolt welded on the bearing bush, the output end of the hydraulic motor is fixedly connected with a pinion through spline fit, the pinion is meshed with a gear fixed on the rotating shaft through key fit, the idler wheel is matched with a U-groove track which is laterally arranged and fixedly connected with a frame bolt through a compression roller side plate, the hydraulic motor drives the rotating shaft to rotate through gear transmission, and the effect of driving the support frame to move along a sliding rail in the front and back direction when the hydraulic motor is driven is realized; the first rotating device is provided with a first worm gear shell fixedly matched with the front end of the support frame, a first fixing plate of the feeding rotating support seat is connected to the upper side of a first worm gear through a bolt, so that the first rotating device is fixedly connected with the feeding rotating support seat, a first hydraulic motor is installed on the first worm gear shell connected with the lower side of the first worm gear through a first bearing inner ring, a first worm is connected to an output shaft of the first hydraulic motor, the first worm is meshed with the first worm gear to drive the first worm gear to rotate, so that the first hydraulic motor drives the first worm gear to rotate to drive the feeding rotating support seat to rotate, and the first worm gear shell is fixedly connected with the first fixing plate through a bolt; the second rotating device is provided with a second worm gear shell fixedly matched with the rear end of the support frame, a second fixing plate is connected with the blanking rotating support seat through a bolt on the upper side of a second worm gear, so that the second rotating device is fixedly connected with the blanking rotating support seat, a second hydraulic motor is installed on the second worm gear shell connected with the lower side of the second worm gear through a second bearing inner ring, a second worm is connected to an output shaft of the second hydraulic motor, the second worm is meshed with the second worm gear to drive the second worm gear to rotate, so that the second hydraulic motor drives the second worm gear to rotate to drive the blanking rotating support seat to rotate, and the second worm gear shell is fixedly connected with the second fixing plate through a bolt.

The structure of support frame is narrow structure under the upper length, and is formed by the section bar welding, and the size ratio of upper portion length and lower part length is about 5: 1, the upper length guarantees that the rotary support can enter the carriage, and the lower width guarantees that the support does not interfere with the carriage when the rotary support enters the carriage, so that the telescopic boom can completely enter the carriage and can rotate forward and backward by 90 degrees, and the loading and unloading of workers are facilitated.

The feeding rotary support structure is of a grid structure, so that the material can be saved, and the bearing capacity can be ensured; the blanking rotary support structure is a hollow shell, process holes are reserved on the surface of the blanking rotary support structure, materials are saved, economical efficiency is guaranteed, and meanwhile bolts are convenient to install and detach.

When the hydraulic lifting device is used, the engine is adopted to drive the whole vehicle to move, power is provided for the hydraulic system, the first rotating device is connected to the front end of the support frame in a matched mode, the second rotating device is connected to the rear end of the support frame in a matched mode, the feeding conveying arm is connected to the first rotating device in a rotating mode, the discharging conveying arm is connected to the second rotating device in a rotating mode, a hydraulic cylinder fixing seat is arranged at the front end of a rotating support in the first rotating device, the hydraulic cylinder fixing seat and a hydraulic cylinder are connected in a pin mode, the other end of the hydraulic cylinder is connected with the feeding conveying arm in a pin mode, and therefore up-and-down swinging of the feeding conveying arm can be achieved.

The diameter of both sides is thinner than the centre in the pivot, makes the centre form boss accurate positioning installation axle sleeve, and the total length after pivot and gyro wheel have been installed is the same with the inside length between U groove track, guarantees that 4 gyro wheels normally work, and the distance between 2 axle bushes in installation hydraulic motor one side and 2 gyro wheels all is greater than on one side of not installing hydraulic motor to reserve installation space for fixing the epaxial gear of commentaries on classics.

The lower end of the support frame is provided with a chain wheel and a pressing strip, the chain wheel is positioned at the other side of a rotating shaft provided with a gear at the tail side of the vehicle, a bearing roller supporting seat is fixed on a cross beam at the lower side of the rotating support frame which slides at the tail side of the vehicle, one end of the chain is fixed on a cross beam of a moving frame at the head side and penetrates through a bearing roller from the upper side to be meshed and connected with the chain wheel, the other end of the chain is fixed on the cross beam of the moving frame at the tail side, the chain wheel and the chain are meshed and connected, so that the sliding rotating support frame can complete braking, the chain cannot slide towards the moving direction after the hydraulic motor stops driving due to inertia force, the functions of uniform stress and stable sliding of the support frame are realized, one end of the pressing strip is fixed with the frame, the other end of the pressing strip is connected with the rear end of the support frame, a circuit is protected from being damaged, and the circuit is driven to safely move, and the support frame can be pressed stably, the deviation of the sliding and rotating support frame caused when the feeding telescopic arm and the discharging telescopic arm rotate horizontally for 90 degrees in the same direction is avoided, and the stability of the whole sliding and rotating driving frame is kept.

On the basis of the technical scheme, the following further technical scheme can be provided: the upper side of the support frame is provided with an integral rotating support, the rotating support is connected with the support frame through a worm gear, two ends of the rotating support are connected with a front rotating support and a rear rotating support, and the rotating support is connected with the rotating support through the worm gear.

The invention has the advantages that: the device can well realize the back-and-forth movement of the transportation device of the movable loading and unloading machine and the rotation of the front and back transportation arms, so that the device is more suitable for the complex working environment of loading and unloading in a goods yard, particularly the loading and unloading operation of a train, has simple and durable structure, flexibility and convenient operation, can realize the requirement of quickly loading and unloading railway goods, can greatly improve the working efficiency, and can reduce the loss of materials to ensure the working safety of workers.

Drawings

FIG. 1 is a side view of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a schematic view of a worm gear;

FIG. 4 is a schematic view of a use state;

FIG. 5 is a schematic view of a feeding rotary support seat;

FIG. 6 is a schematic view of a rotary support seat for discharging;

FIG. 7 is a side view of the sprocket chain arrangement of the mobile multi-function loader of the present invention;

fig. 8 is a detail view of the shaft gear mesh.

Wherein: 1-support frame, 2-first rotating device, 3-second rotating device, 4-material loading rotating support seat, 5-material unloading rotating support seat, 6-gear, 7-roller, 8-hydraulic motor, 9-hydraulic motor support seat, 10-large fixed plate, 11-small fixed plate, 12-bearing bush, 13-rotating shaft, 14-shaft sleeve, 15-material loading conveying arm, 16-middle arm, 17-material unloading conveying arm, 18-loading vehicle, 21-first fixed plate, 22-first worm gear and worm gear shell, 23-first turbine, 24-first hydraulic motor, 25-first worm gear, 26-first bearing inner ring, 31-second fixed plate, 32-second worm gear and worm gear shell, 33-second turbine, 34-a second hydraulic motor, 35-a second worm, 36-a second bearing inner ring, 41-a frame, 42-a pinion, 43-a press roll side plate, 60-a U-groove track, 61-a chain, 62-a chain wheel, 63-a bearing idler, 64-a bearing idler supporting seat and 65-a pressing strip.

Detailed Description

For the purpose of making the patent of the present invention more clear, the following detailed description of the device in conjunction with the accompanying drawings is given by way of illustration only, and not by way of limitation, of the patent of the present invention.

As shown in fig. 1 to 8, the present invention provides a sliding rotation support structure of a mobile multifunctional loader, which includes a support frame 1, a first rotation device 2 located at the front end of the support frame 1 and connected to the support frame in a matching manner, and a second rotation device 3 connected to the rear end of the support frame 1 in a matching manner; the support frame 1 is formed by welding sectional materials, 4 end points at the lower end of the support frame 1 are respectively welded with a large fixing plate 10 which is connected with a small fixing plate 11 and a bearing bush 12 through bolts, the bearing bush 12 is in clearance fit connection with a shaft sleeve 14, the shaft sleeve 14 is in interference fit connection with a rotating shaft 13, the rotating shaft 13 is in key connection with a roller 7, the hydraulic motor 8 is in bolt fixed connection with a hydraulic motor support 9 welded on the bearing bush 12, the output end of the hydraulic motor 8 is fixedly connected with a pinion 42 through spline fit, the pinion 42 is meshed with a gear 6 fixed on the rotating shaft 13 through key fit, the roller 7 is matched with a U-groove rail 60 which is laterally arranged and fixedly connected with a frame 41 through a bolt through a compression roller side plate 43, the hydraulic motor 8 drives the rotating shaft 13 to rotate through gear transmission, and the effect of driving the support frame 1 to move along a sliding rail forwards and backwards when the hydraulic motor 8 is driven is realized; the first rotating device 2 is provided with a first worm gear shell 22 fixedly matched with the front end of the support frame 1, a first fixing plate 21 of the feeding rotating support seat 4 is connected to the upper side of the first worm gear 23 through a bolt, so that the fixed connection between the first rotating device 2 and the feeding rotating support seat 4 is realized, a first hydraulic motor 24 is installed on the first worm gear shell 22 connected with the lower side of the first worm gear 23 through a first bearing inner ring 26, a first worm 25 is connected to an output shaft of the first hydraulic motor 24, the first worm 25 is meshed with the first worm gear 23, so that the first worm gear 23 is driven to rotate, the first worm gear 24 drives the first worm gear 23 to rotate to drive the feeding rotating support seat 4 to rotate, and the first worm gear shell 22 is fixedly connected with the first fixing plate 21 through a bolt; the second rotating device 3 is provided with a second worm gear shell 32 fixedly matched with the rear end of the support frame 1, the upper side of the second worm gear 33 is connected with a second fixing plate 31 of the blanking rotating support base 5 through a bolt, so that the second rotating device 3 is fixedly connected with the blanking rotating support base 5, a second hydraulic motor 34 is installed on the second worm gear shell 32 connected with the lower side of the second worm gear 33 through a second bearing inner ring 36, a second worm 35 is connected on an output shaft of the second hydraulic motor 34, the second worm 35 is meshed with the second worm gear 33 to drive the second worm gear 33 to rotate, so that the second hydraulic motor 34 drives the second worm gear 33 to rotate to drive the blanking rotating support base 5 to rotate, and the second worm gear shell 32 is fixedly connected with the second fixing plate 31 through a bolt.

The structure of support frame 1 is narrow structure under the upper length, and is formed by the section bar welding, and the size ratio of upper portion length and lower part length is about 5: 1, the upper length guarantees that the rotary support can enter the carriage, and the lower width guarantees that the support does not interfere with the carriage when the rotary support enters the carriage, so that the telescopic boom can completely enter the carriage and can rotate forward and backward by 90 degrees, and the loading and unloading of workers are facilitated.

The structure of the feeding rotary support 4 is a grid structure, so that the material can be saved and the bearing capacity can be ensured; the blanking rotating support 5 is a hollow shell, process holes are reserved on the surface of the blanking rotating support, materials are saved, economical efficiency is guaranteed, and meanwhile installation and disassembly of bolts are facilitated.

When the automatic feeding and discharging device is used, the engine is adopted to drive the whole vehicle to move, power is provided for the hydraulic system, the first rotating device 2 is connected to the front end of the support frame 1 in a matched mode, the second rotating device 3 is connected to the rear end of the support frame 1 in a matched mode, the feeding and conveying arm 15 is connected to the first rotating device 2 in a rotating mode, the discharging and conveying arm 17 is connected to the second rotating device 3 in a rotating mode, a hydraulic cylinder fixing seat is arranged at the front end of a rotating support in the first rotating device 2 and connected with the hydraulic cylinder through a pin, and the other end of the hydraulic cylinder is connected with the feeding and conveying arm through a pin.

The diameter of both sides is thinner than the centre on the pivot 13, makes the centre form boss accurate positioning installation axle sleeve 14, and the total length after pivot 13 and gyro wheel 7 have been installed is the same with inside length between U groove track 60, guarantees 4 gyro wheels 7 and normally works, and the distance between 2 axle bushes 12 of installation hydraulic motor 8 one side and 2 gyro wheels 7 all is greater than not installing hydraulic motor 8 one side to reserve installation space for fixing the gear 6 on pivot 13.

The lower end of the support frame 1 is provided with a chain wheel 62 and a pressing strip 65, the chain wheel 62 is positioned at the other side of the rotating shaft 13 of the tail side provided with the gear 6, the tail side slides and rotates the support frame 1, a bearing roller supporting seat 64 is fixed on a lower side beam, one end of a chain 61 is fixed on a moving frame beam at the head side, penetrates through a bearing roller 63 from the upper side and is meshed and connected with the chain wheel 62, the other end of the chain is fixed on the moving frame beam at the tail side, through the meshed and connection of the chain wheel 62 and the chain 61, the sliding and rotating driving frame can complete braking, the sliding and rotating driving frame can not slide towards the moving direction due to inertia force after the hydraulic motor stops driving, the functions of uniformly bearing force and ensuring the stable sliding of the support frame 1 are achieved, one end of the pressing strip 65 is fixed with the frame 41, the other end is connected with the rear end of the support frame 1, a circuit is arranged inside the pressing strip 65, the circuit is protected from being damaged, and the circuit is driven to safely move, can press steady support frame 1, avoid the incline of the rotatory support frame that slides that leads to when the flexible arm of material loading and the flexible arm of unloading are simultaneously to equidirectional horizontal rotation 90, keep the stability of whole rotatory drive frame that slides.

The front side and the rear side of the loading vehicle 18 are both connected with a hydraulic supporting device in a matched mode, the supporting device comprises supporting legs, a cross beam and a hydraulic oil way, the supporting legs are of circular through pipe-shaped structures, the supporting legs are driven by hydraulic pressure to stretch up and down, the lifting stroke of the supporting legs is 450mm, the height of a loading and unloading machine can be guaranteed to be consistent with the height of a train carriage while the stability of the whole loading and unloading machine is improved, stretching of telescopic arms and transportation of goods are facilitated, and the middle arm 17 is fixedly installed at the upper end of the supporting frame 1.

The above description is only a preferred embodiment of the present invention, and it should be noted that there are many more specific structures due to the limited character expression, and a plurality of modifications, decorations or changes can be made without departing from the principle of the present invention, and the idea and technical solution of the present invention can be directly applied to other occasions without being modified, and all should be regarded as the protection scope of the present invention.