A loader with a rotating upper hopper

Abstract

The present invention provides a loader with a rotating hopper, comprising a traveling device, a feeding device, a belt conveying device and a tensioning mechanism, wherein the feeding device comprises a feeding frame, a first roller, a second roller, a third roller, a conveyor belt, a first driving device, a second driving device and a feeding roller, wherein the first roller, the second roller and the third roller are provided with a conveyor belt, the first driving device is connected to the first roller by transmission, the feeding frame is installed in front of the traveling device, a plurality of feeding hoppers distributed at equal intervals are provided on the outer side wall of the conveyor belt, a tensioning mechanism is installed between the conveyor belt and the feeding frame, a feeding roller is rotatably installed at the bottom of the feeding frame in front of the conveyor belt, the second driving device is used to drive the feeding roller to rotate, and the belt conveying device is installed on the traveling device. The technical problems of large space required and low loading efficiency when traditional loading machinery or transfer machinery performs loading or transfer operations can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of engineering machinery, in particular to a loader with a rotating upper hopper. Background Art

[0002] In industrial or agricultural production, it is often necessary to use loading machinery to push fine particles or powdery materials (such as river sand, rice, feed, etc.) into piles and then send them to warehouses or load them into cargo boxes for storage. Traditional front loaders and excavators are not dedicated to loading fine particles or powdery materials. In addition, most existing loaders use front buckets, which take up a large space and require a large space to turn the bucket materials into the car cargo box after loading. Each time the loader loads, it needs to repeat the operation and transportation, resulting in high fuel consumption. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a loader with a rotating upper hopper to solve the technical problems of large space required and low loading efficiency of traditional loading machinery or transfer machinery during loading or transfer operations.

[0004] In order to solve the above technical problems, the technical solution of the present invention is: a loader with a rotating loading hopper, comprising a walking device, a loading device, a belt conveyor and a tensioning mechanism, the loading device comprising a loading rack, a first roller, a second roller, a third roller, a conveyor belt, a first driving device, a second driving device and a loading roller, the first roller is rotatably installed on the front upper part of the loading rack, the second roller is rotatably installed on the loading rack and is located below the first roller, the third roller is rotatably installed on the loading rack and is located behind the first roller, the first roller, the second roller and The conveyor belt is installed on the third roller, the first driving device is installed on the loading rack and is connected to the first roller in transmission, the loading rack is installed in front of the traveling device, the loading roller is rotatably installed on the bottom of the loading rack in front of the conveyor belt, the second driving device is installed on the loading rack to drive the loading roller to rotate, the belt conveyor device is installed on the traveling device, the front part of the belt conveyor device is located below the third roller, the tensioning mechanism is installed between the conveyor belt and the loading rack, and a plurality of loading hoppers distributed at equal intervals are provided on the outer side wall of the conveyor belt.

[0005] Preferably, the feeding roller includes a roller shaft, a feeding plate and a baffle, the roller shaft is rotatably mounted on the feeding frame, a plurality of feeding plates are evenly arranged around the roller shaft at equal angles, and a circular baffle is respectively provided at both ends of the roller shaft.

[0006] Preferably, a lifting device is provided between the feeding device and the walking device, and the lifting device includes a connecting frame, a slide rail, a slider and a first hydraulic cylinder. The slide rail is vertically fixed to the front side of the connecting frame, the slider is slid on the slide rail, the first hydraulic cylinder is vertically arranged between the connecting frame and the slider, the upper end of the first hydraulic cylinder is connected to the top of the connecting frame, the lower end of the first hydraulic cylinder is connected to the slider, the rear side of the feeding frame is fixedly connected to the slider, and the connecting frame is installed in front of the walking device.

[0007] Preferably, the tensioning mechanism includes a tensioning frame and a tensioning wheel, and long holes are respectively provided on the side walls of the loading frame. The tensioning frame is located below the conveyor belt and its left and right ends are respectively fixed in one of the long holes by fasteners. The tensioning wheel is rotatably installed on the tensioning frame and abuts against the bottom of the conveyor belt.

[0008] Preferably, the belt conveyor device includes a support frame, a front roller, a rear roller, a conveyor belt, a third drive device and a pre-tensioning assembly. The support frame is fixedly installed above the walking device, the front roller rotates on the loading rack, the rear part of the support frame is rotatably installed with a rear roller, the conveyor belt is installed between the front roller and the rear roller, the third drive device is installed on the support frame or the connecting frame, the third drive device is transmission-connected to the rear roller, and the pre-tensioning assembly is installed between the conveyor belt and the connecting frame.

[0009] The pre-tensioning assembly includes a support rod, a pre-tensioning roller, a connecting rod and a gas spring. The support rod is laterally arranged below the conveyor belt and its two ends are connected to the connecting frame via a connecting rod and a gas spring respectively. The upper end of the connecting rod and the lower end of the gas spring are respectively hinged to the connecting frame, the lower end of the connecting rod and the upper end of the gas spring are respectively hinged to the end portion of the support rod, and the pre-tensioning roller is installed on the support rod.

[0010] Preferably, a supporting mechanism is provided at the lower part of the connecting frame, and the supporting mechanism includes a second hydraulic cylinder and a supporting base, the cylinder body at the upper part of the second hydraulic cylinder is fixedly connected to the bottom of the connecting frame, and the piston rod end portion at the lower part of the second hydraulic cylinder is hinged to the supporting base.

[0011] The connecting frame and the traveling device are connected by a three-hanging-point suspension structure, and the three-hanging-point suspension structure includes a left lifting ear, a right lifting ear and an upper lifting ear, the left lifting ear and the right lifting ear are arranged side by side at the lower part of the rear side of the connecting frame, and the upper lifting ear is arranged in the middle of the connecting frame and above the left lifting ear and the right lifting ear, the left lifting ear and the right lifting ear are respectively hinged to the frame of the traveling device through a pin shaft, and a third hydraulic cylinder is installed between the upper lifting ear and the traveling device, one end of the piston rod of the third hydraulic cylinder is hinged to the upper lifting ear through a pin shaft, and one end of the cylinder body of the third hydraulic cylinder is hinged to the frame of the traveling device through a pin shaft.

[0012] The technical effects achieved by adopting the above technical solution are:

[0013] This mechanical device can continuously reel in and transport materials through the loading device at the front and transport the materials out from the rear through the belt conveyor device without stopping work for transfer. It has the characteristics of high efficiency, time saving, small space occupation, and small space required for movement. The present application is a mechanical device specially used for loading fine particles or powdery materials, and is suitable for loading fine particles or powdery materials (such as river sand, rice, feed, etc.) into warehouses or cargo boxes for storage. When the conveyor is performing loading operations, the loading roller flips the material up into the loading hopper at the rear, and the conveyor belt and the loading roller are driven by the driving device to rotate continuously to continuously transport the material to the belt conveyor device. The loading and transportation process can be carried out continuously, and the material is directly output from the rear of the conveyor belt without stopping in the middle. Compared with the traditional bucket loader that needs to carry the material one bucket at a time, the machine can continuously carry out loading operations and does not need to turn around during the work process, but directly transports the material to the rear for boxing and storage, thereby saving the time and cost of transportation, making the loading process more efficient and convenient. Therefore, the loader has the characteristics of high working efficiency, simple operation, small working space, time and cost saving.

[0014] Since a lifting device is provided between the feeding device and the walking device, the lifting device includes a connecting frame, a slide rail, a slider and a first hydraulic cylinder, the slide rail is vertically fixed to the front side of the connecting frame, the slider is slid on the slide rail, the first hydraulic cylinder is vertically arranged between the connecting frame and the slider, the upper end of the first hydraulic cylinder is hinged to the top of the connecting frame, the lower end of the first hydraulic cylinder is fixedly connected to the top of the slider, the rear side of the feeding frame is fixedly connected to the slider, and the connecting frame is installed in front of the walking device. The height of the feeding device can be adjusted by the lifting device, which can be adapted to the feeding of materials of different heights, and the feeding device can be lifted up for easy walking when the feeding is completed.

[0015] Since the feeding roller includes a roller shaft, a feeding plate and a baffle, the roller shaft is rotatably installed on the feeding frame, a plurality of feeding plates are evenly arranged around the roller shaft at equal angles, and a circular baffle is respectively provided at both ends of the roller shaft, the feeding roller can roll the material into the feeding hopper at the rear when it rolls.

[0016] Since the tensioning mechanism includes a tensioning frame and a tensioning wheel, long holes are respectively provided on the side walls of the loading frame, the tensioning frame is located below the conveyor belt and its left and right ends are respectively fixed in one of the long holes by fasteners, and the tensioning wheel is rotatably installed on the tensioning frame and abuts against the bottom of the conveyor belt. The tensioning mechanism can tension the conveyor belt.

[0017] Since the belt conveyor device includes a support frame, a front roller, a rear roller, a conveyor belt, a third drive device and a pre-tightening assembly, the support frame is installed above the walking device, the front roller rotates on the loading frame, the rear of the support frame is rotatably installed with a rear roller, the conveyor belt is installed between the front roller and the rear roller, the third drive device is installed on the support frame, and the third drive device is connected to the rear roller in a transmission manner. When unloading, the loading hopper tilts backward to unload the material onto the conveyor belt, and the belt conveyor device receives the material unloaded from the loading bucket and transports the material to the cargo compartment of a truck for collection.

[0018] Since the pre-tightening assembly is installed between the conveyor belt and the connecting frame, the pre-tightening assembly includes a support rod, a pre-tightening roller, a connecting rod and a gas spring. The support rod is transversely arranged below the conveyor belt and its two ends are connected to the connecting frame through a connecting rod and a gas spring respectively. The upper end of the connecting rod and the lower end of the gas spring are respectively hinged to the connecting frame, and the lower end of the connecting rod and the upper end of the gas spring are respectively hinged to the end of the support rod. The pre-tightening assembly can pre-tighten the conveyor belt to prevent the front part of the conveyor belt from loosening and slipping as the loading rack moves up and down, and the lower conveyor belt is loose and sinks and cannot work normally.

[0019] Since a support mechanism is provided at the bottom of the connecting frame, the support mechanism includes a second hydraulic cylinder and a support base, the cylinder body at the upper part of the second hydraulic cylinder is fixedly connected to the bottom of the connecting frame, and the piston rod end head at the lower part of the second hydraulic cylinder is hinged to the support base. The support mechanism is used to support the lifting device to ensure its uniform force and working stability, prevent the entire device from tipping over due to unbalanced force when loading materials at the front, and avoid excessive load being transferred to the walking device during work to achieve the purpose of protecting the walking device.

[0020] Since the connecting frame and the traveling device are connected via a three-hanging-point suspension structure, the three-hanging-point suspension structure includes a left hanging ear, a right hanging ear and an upper hanging ear, the left hanging ear and the right hanging ear are arranged side by side at the lower part of the rear side of the connecting frame, the upper hanging ear is arranged in the middle of the connecting frame and is located above the left hanging ear and the right hanging ear, the left hanging ear and the right hanging ear are respectively hinged to the frame of the traveling device via a pin shaft, a third hydraulic cylinder is installed between the upper hanging ear and the traveling device, one end of the piston rod of the third hydraulic cylinder is hinged to the upper hanging ear via a pin shaft, and one end of the cylinder body of the third hydraulic cylinder is hinged to the frame of the traveling device via a pin shaft. The inclination angle of the connecting frame can be adjusted via the three-hanging-point suspension structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present application is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 It is a schematic diagram of the front structure of this application;

[0023] Figure 2 It is a schematic diagram of the rear structure of this application;

[0024] Figure 3 It is a schematic diagram of the front structure of the walking device;

[0025] Figure 4 It is a structural schematic diagram of the feeding device of the present application;

[0026] Figure 5 It is a schematic diagram of the rear structure of the lifting device;

[0027] Figure 6 It is a schematic diagram of the front structure of the lifting device;

[0028] In the figure, 11, frame; 12, wheel; 13, cab; 14, limiting boss; 15, chassis assembly; 16, crawler; 21, connecting frame; 22, slide rail; 23, slider; 24, first hydraulic cylinder; 25, second hydraulic cylinder; 26, supporting base; 27, limiting rope; 30, first driving device; 31, loading rack; 32, first roller; 33, second roller; 34, third roller; 35, conveyor belt; 36, loading roller; 37, loading hopper; 38 , second drive device; 41, support frame; 42, front roller; 43, rear roller; 44, conveyor belt; 45, third drive device; 46, support roller; 47, belt pressing roller; 51, left lifting ear; 52, right lifting ear; 53, upper lifting ear; 54, third hydraulic cylinder; 6, rear bucket; 71, tensioning frame; 72, tensioning wheel; 81, support rod; 82, pre-tightening roller; 83, connecting rod; 84, gas spring; 91, roller; 92, loading plate; 93, baffle. DETAILED DESCRIPTION

[0029] like Figures 1 to 3 As shown, a loader with a rotating loading hopper includes a traveling device, a feeding device, a belt conveying device and a tensioning mechanism. The traveling device is preferably a crawler traveling device. In this embodiment, the traveling device is composed of a crawler traveling mechanism and a steering system, etc. The crawler traveling mechanism includes a frame 11 and a chassis assembly 15, and the chassis assembly 15 includes an engine, a hydraulic system, a crawler track 16, a wheel 12 and a transmission, etc. The engine of the traveling device drives the wheel 12 and the crawler track 16 to move through the hydraulic system and the transmission, and the steering system is used to control the steering of the traveling device. The main function of the traveling device is to enable the feeding device and the belt conveying device to move and walk, so the traveling device can also be replaced by other mechanical devices with walking functions.

[0030] like Figure 4 As shown, the feeding device includes a feeding frame 31, a first roller 32, a second roller 33, a third roller 34, a conveyor belt 35, a first driving device 30, a second driving device 38 and a feeding roller 36. The first roller 32 is rotatably mounted on the front upper part of the feeding frame 31, the second roller 33 is rotatably mounted on the feeding frame 31 and is located below the first roller 32, the third roller 34 is rotatably mounted on the feeding frame 31 and is located behind the first roller 32, the first roller 32, the second roller 33 and the third roller 34 are equipped with a conveyor belt 35, the first driving device 30 is mounted on the feeding frame 31 and is in transmission connection with the first roller 32, and the first driving device 30 is preferably a driving motor. A plurality of feeding hoppers 37 are arranged on the outer wall of the conveyor belt 35 and are distributed at equal intervals. A tensioning mechanism is installed between the conveyor belt 35 and the loading rack 31, and the tensioning mechanism includes a tensioning frame 71 and a tensioning wheel 72. Long holes are respectively provided on the side walls of the loading rack 31. The tensioning frame 71 is located below the conveyor belt 35, and its left and right ends are respectively fixed in a long hole by fasteners. The tensioning wheel 72 is rotatably installed on the tensioning frame 71 and abuts against the bottom of the conveyor belt 35. The installation position of the tensioning wheel 72 is staggered with the loading hopper 37, and the tensioning mechanism can play a tensioning role on the conveyor belt 35.

[0031] The loading rack 31 is installed in front of the walking device. A loading roller 36 is rotatably installed at the bottom of the loading rack 31 in front of the conveyor belt 35. The second driving device 38 is installed on the loading rack 31 to drive the loading roller 36 to rotate. The loading roller 36 includes a roller shaft 91, a loading plate 92 and a baffle 93. The roller shaft 91 is rotatably installed on the loading rack 31. Several loading plates 92 are evenly arranged around the roller shaft 91 at equal angles. A circular baffle 93 is respectively provided at both ends of the roller shaft 91. The loading roller 36 rolls to roll the material into the rear loading hopper 37.

[0032] like Figure 6As shown, a lifting device is installed between the feeding device and the walking device, and the lifting device includes a connecting frame 21, a slide rail 22, a slider 23 and a first hydraulic cylinder 24. The slide rail 22 is vertically fixed to the front side of the connecting frame 21, and the slider 23 is slid on the slide rail 22. The first hydraulic cylinder 24 is vertically arranged between the connecting frame 21 and the slider 23. The upper end of the first hydraulic cylinder 24 is connected to the top of the connecting frame 21, and the lower end of the first hydraulic cylinder 24 is connected to the side of the slider 23 through the connecting frame. The rear side of the feeding frame 31 is fixedly connected to the slider 23 through the connecting frame, and the connecting frame 21 is installed in front of the walking device. The height of the feeding device can be adjusted by the lifting device, which can be adapted to the feeding of materials of different thicknesses, and the feeding device can be lifted up for walking when the feeding is completed.

[0033] A support mechanism is provided at the bottom of the connecting frame 21, and the support mechanism includes a second hydraulic cylinder 25 and a support base 26. The cylinder body at the upper part of the second hydraulic cylinder 25 is fixedly connected to the bottom of the connecting frame 21, and the piston rod end of the lower part of the second hydraulic cylinder 25 is hingedly connected to the support base 26. The support mechanism is used to support the lifting device to ensure its uniform force and working stability, prevent the entire device from tipping over due to unbalanced force when loading materials at the front, and prevent excessive load from being transferred to the walking device during work to achieve the purpose of protecting the walking device.

[0034] The connecting frame 21 is connected to the traveling device through a three-hanging-point suspension structure, which includes a left hanging ear 51, a right hanging ear 52 and an upper hanging ear 53. The left hanging ear 51 and the right hanging ear 52 are arranged side by side at the lower part of the rear side of the connecting frame 21. The upper hanging ear 53 is arranged in the middle of the connecting frame 21 and is located above the left hanging ear 51 and the right hanging ear 52. The left hanging ear 51 and the right hanging ear 52 are respectively hinged to the frame 11 through a pin shaft. A third hydraulic cylinder 54 is installed between the upper hanging ear 53 and the frame 11. One end of the piston rod of the third hydraulic cylinder 54 is hinged to the upper hanging ear through a pin shaft, and one end of the cylinder body of the third hydraulic cylinder 54 is hinged to the frame 11 through a pin shaft. The inclination angle of the connecting frame 21 can be adjusted through the three-hanging-point suspension structure.

[0035] The belt conveyor is installed on the traveling device, and the front part of the belt conveyor is located below the third roller 34. The belt conveyor includes a support frame 41, a front roller 42, a rear roller 43, a conveyor belt 44, a third drive device 45 and a pre-tightening assembly. The support frame 41 is installed above the traveling device, and the front roller 42 rotates on the loading frame 31 or the connecting frame 21. The rear part of the support frame 41 is rotatably installed with the rear roller 43. The conveyor belt 44 is installed between the front roller 42 and the rear roller 43. Flanges are provided on both sides of the conveyor belt 44 to prevent material leakage. A rack can be fixed on the inner side wall of the conveyor belt, and gears can be fixed on the front roller 42 and the rear roller 43, respectively, and the gears are respectively meshed with the racks. The combination of the rack and the gear can prevent the conveyor belt 44 from slipping. The third drive device 45 is installed on the support frame 41, and the third drive device 45 is connected to the rear roller 43 in a transmission manner. When unloading, the upper hopper 37 tilts backward to unload the materials onto the conveyor belt 44. The belt conveyor receives the materials unloaded from the upper hopper 37 and transports the materials to the cargo compartment of a truck for collection. A support roller 46 is also provided between the front roller 42 and the rear roller 43 on the support frame 41. Belt pressing rollers 47 are respectively installed on the upper and lower sides of the conveyor belt 44 on the support frame 41. The belt pressing rollers 47 limit and press the conveyor belt 44, and have the functions of guiding, preventing slippage, and preventing the conveyor belt 44 from shaking up and down and becoming unstable. Belt pressing rollers 47 are also installed on the upper material frame 31 or the connecting frame 21 to tilt the front part of the conveyor belt 44 to facilitate the backward transportation of materials.

[0036] like Figure 5 As shown, the conveyor belt 44 and the connecting frame 21 are provided with a pre-tightening assembly, which includes a support rod 81, a pre-tightening roller 82, a connecting rod 83 and a gas spring 84. The support rod 81 is provided below the conveyor belt 44 and its two ends are connected to the connecting frame 21 through the connecting rod 83 and the gas spring 84 respectively. The upper end of the connecting rod 83 and the lower end of the gas spring 84 are respectively hinged to the connecting frame 21, and the lower end of the connecting rod 83 and the upper end of the gas spring 84 are respectively hinged to the end of the support rod 81. The support rod 81 is provided with a pre-tightening roller 82, which abuts against the conveyor belt 44. The pre-tightening assembly can pre-tighten the conveyor belt 44 to prevent the front of the conveyor belt 44 from loosening and slipping as the loading frame 31 moves up and down.

[0037] The chassis assembly 15 integrates the hydraulic system and the transmission mechanism and other components in the housing. The hydraulic system is connected to the wheels 12 through the corresponding transmission shaft to achieve power output and support the body. A limit boss 14 is provided between the frame 11 and the connecting frame 21. The limit boss 14 is fixed on the frame 11 and is used to limit the limit position when the connecting frame 21 rotates. Prevent the lifting device from exceeding the limit position and causing an accidental danger.

[0038] Above the frame 11 is the cab 13. When the cab 13 is at a lower position, a camera can be installed at the front of the whole machine, and a display for displaying the images captured by the camera can be installed inside the cab. The driver can observe the images captured by the camera through the display to avoid blind spots. The rear bucket 6 can be connected to the chassis assembly 15 of the walking device through a bracket and a hydraulic component. The wheels 12 include driving wheels and supporting wheels. A driving wheel is arranged in front and behind each side of the crawler 16 of the walking device, which is used to engage with the crawler 16 to provide power. The middle supporting wheel is used to evenly distribute the force of the walking device to the crawler 16 to prevent overloading and unbalanced force of the driving wheel, so as to achieve stable force and movement of the entire device.

[0039] A connecting limit rope 27 is arranged between the walking device and the connecting frame 21. The connecting limit rope 27 is a limit steel rope. Threaded connecting sleeves are arranged at both ends of the limit rope 27 and are installed on the walking device and the connecting frame 21 by bolts. When the hydraulic component of the lifting device loses control or the lifting device falls to the ground around the left lifting ear 51 and the right lifting ear 52 due to oil leakage, the limit steel rope can tighten the lifting device and the loading device thereon to limit the position to prevent accidents.

[0040] The second drive device 38 and the third drive device 45 each include a hydraulic motor and a reducer. The first hydraulic cylinder 24, the second hydraulic cylinder 25, the third hydraulic cylinder 54, the second drive device 38 and the third drive device 45 are respectively connected to the hydraulic pump of the hydraulic system through oil circuits to obtain driving force.

[0041] The working principle of the loader with a rotating upper hopper of the present application is:

[0042] When the machine is working, the material is rolled up by the conveyor belt 35 and the loading hopper 37 of the front feeding device and then sent out by the long conveyor belt 44 at the rear. The upper and lower heights of the feeding device are adjusted by the lifting device to realize the adaptive adjustment and rolling up of the material in the upper and lower directions. The walking device can drive the feeding device and the lifting device to rotate to realize the material in the rotation direction. The material can be rolled up, and the material in the front and rear positions can be adjusted by the front and rear movement of the walking device, so that the material can be rolled up and transported by the machine in the up and down, left and right (rotation direction), front and back, and the scattered particles or powdery objects can be pushed into piles by the rear bucket 6 at the rear and then rolled up and transported without the need for additional machinery.

Claims

1. A loader with a rotating upper hopper, characterized in that: It includes walking device, feeding device, belt conveying device and tensioning mechanism. The feeding device includes a feeding frame, a first roller, a second roller, a third roller, a conveyor belt, a first driving device, a second driving device and a feeding roller, the first roller is rotatably installed on the front upper part of the feeding frame, the second roller is rotatably installed on the feeding frame and is located below the first roller, the third roller is rotatably installed on the feeding frame and is located behind the first roller, the conveyor belt is installed on the first roller, the second roller and the third roller, the first driving device is installed on the feeding frame and is transmission-connected with the first roller, the feeding frame is installed in front of the walking device, a plurality of feeding hoppers distributed at equal intervals are provided on the outer side wall of the conveyor belt, and the tensioning mechanism is installed between the conveyor belt and the feeding frame, The feeding roller is rotatably mounted at the bottom of the feeding rack in front of the conveyor belt, and the second driving device is mounted on the feeding rack to drive the feeding roller to rotate. The belt conveyor is installed on the walking device, and the front part of the belt conveyor is located below the third roller. The feeding roller comprises a roller shaft, a feeding plate and a baffle. The roller shaft is rotatably mounted on the feeding frame. A plurality of feeding plates are evenly arranged around the roller shaft at equal angles. A circular baffle is respectively provided at both ends of the roller shaft. A lifting device is provided between the feeding device and the walking device, and the lifting device includes a connecting frame, a slide rail, a slider and a first hydraulic cylinder. The slide rail is vertically fixed to the front side of the connecting frame, the slider is slidably arranged on the slide rail, the first hydraulic cylinder is vertically arranged between the connecting frame and the slider, the upper end of the first hydraulic cylinder is connected to the top of the connecting frame, the lower end of the first hydraulic cylinder is connected to the top of the slider, the rear side of the feeding frame is fixedly connected to the slider, and the connecting frame is installed in front of the walking device. The belt conveyor device includes a support frame, a front roller, a rear roller, a conveyor belt, a third drive device and a pre-tightening component, the support frame is installed above the walking device, the front roller rotates on the loading frame or the connecting frame, the rear part of the support frame is rotatably installed with the rear roller, the conveyor belt is installed between the front roller and the rear roller, the third drive device is installed on the support frame, the third drive device is connected to the rear roller by transmission, and the pre-tightening component is installed between the conveyor belt and the connecting frame. The pre-tightening assembly comprises a support rod, a pre-tightening roller, a connecting rod and a gas spring. The support rod is transversely arranged below the conveyor belt and its two ends are respectively connected to the connecting frame through the connecting rod and the gas spring. The upper end of the connecting rod and the lower end of the gas spring are respectively hinged to the connecting frame, and the lower end of the connecting rod and the upper end of the gas spring are respectively hinged to the end portion of the support rod. The pre-tightening roller is installed on the support rod. A supporting mechanism is provided at the lower part of the connecting frame, and the supporting mechanism includes a second hydraulic cylinder and a supporting base. The cylinder body at the upper part of the second hydraulic cylinder is fixedly connected to the bottom of the connecting frame, and the piston rod end head at the lower part of the second hydraulic cylinder is hinged to the supporting base. The connecting frame and the traveling device are connected by a three-hanging-point suspension structure, and the three-hanging-point suspension structure includes a left lifting ear, a right lifting ear and an upper lifting ear, the left lifting ear and the right lifting ear are arranged side by side at the lower part of the rear side of the connecting frame, and the upper lifting ear is arranged in the middle of the connecting frame and above the left lifting ear and the right lifting ear, the left lifting ear and the right lifting ear are respectively hinged to the frame of the traveling device through a pin shaft, and a third hydraulic cylinder is installed between the upper lifting ear and the traveling device, one end of the piston rod of the third hydraulic cylinder is hinged to the upper lifting ear through a pin shaft, and one end of the cylinder body of the third hydraulic cylinder is hinged to the frame of the traveling device through a pin shaft.

2. The loader with a rotating upper hopper according to claim 1, characterized in that: The tensioning mechanism includes a tensioning frame and a tensioning wheel. Long holes are respectively provided on the side walls of the loading frame. The tensioning frame is located below the conveyor belt and its left and right ends are respectively fixed in one of the long holes by fasteners. The tensioning wheel is rotatably installed on the tensioning frame and abuts against the bottom of the conveyor belt.

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