CN108517905A - A kind of giant caterpillar digging type digging loading machine - Google Patents

Abstract

The invention discloses a chassis assembly for a digging loader, which comprises a chassis frame, on which a longitudinal traveling device and a transverse traveling device are arranged, and the transverse traveling device and the longitudinal traveling device are arranged vertically to each other; the chassis frame is also provided with There is a hydraulic lifting device. The hydraulic lifting device includes a parallelogram mechanism and a crank rocker mechanism. One end of the parallelogram mechanism is hinged to the chassis frame, and the other end is hinged to the transverse walking device. One end of the crank rocker mechanism is hinged to the chassis frame, and the other end is hinged to the parallelogram Mechanism hinged. The invention is simple in structure and easy to use, and has the function of lateral travel. When the invention needs lateral travel, the lateral travel device is supported by the oil cylinder, and travels to the required position by the lateral travel crawler, effectively solving the problem of poor parking position of the mining loader. , Unreasonable loading position or limited lateral movement, etc., so that the equipment can move to a reasonable position.

Description

A large crawler digging loader

technical field

The invention relates to an excavation loader, which belongs to the technical field of crawler excavation excavation loaders, in particular to a large crawler excavation excavation loader.

Background technique

The integrated digging and loading machine is widely used in various excavation sites such as coal, ore, and earthwork. It excavates materials through the front-end bucket, transports the materials to the tail through its own conveying mechanism, and then unloads them into other conveying equipment, which can realize the excavation of materials. Digging and loading continuous operation. Existing excavating and loading integrated machines are generally composed of excavating devices, shovel plates, scraper conveyors, traveling devices, and operating systems. Wherein the walking device includes crawler type, tire type, automobile type, suspension type, drag type and walking type. Among them, the crawler hydraulic excavator is the most widely used because of its good climbing ability, working stability and ability to adapt to harsh working environments, but it has the defect that it can only move forward and backward in one direction. , It is not conducive to the movement of the position of the excavator.

A walking hydraulic excavator is disclosed in the Chinese utility model patent CN201411726Y, which is mainly composed of a common hydraulic excavating device and a unique hydraulic walking device. The hydraulic walking device includes a longitudinal movement mechanism, a hydraulic leg And the lateral movement mechanism, its walking mode has three kinds of longitudinal movement, lateral movement and steering; in addition, this walking hydraulic excavator also has a side movement mechanism with a simple structure and a following light in the left, middle and right three excavation working positions. First of all, this invention is a walking device, rather than a crawler type running device, so the structure of this invention does not solve the technical problem of inconvenient mobile positioning of the above-mentioned excavator.

In the Chinese utility model patent CN203581165U, a vehicle lateral moving device and a vehicle moving device are disclosed. Two support frames are located on the left and right sides of the vehicle chassis. The support frames are equipped with rollers and crawlers. The hydraulic system is responsible for closing and opening the two support frames. , the device is powered by the engine of the car itself, and is also provided with a clutch, which can be controlled to switch on and off the power source; when the device uses rollers, it can realize lateral movement, and when using crawlers, it can walk on snow; The positioning of the crawler-type traveling device provides a kind of thinking, but this invention is only applicable to the field of automobiles, and the chassis assembly of the present invention is a load-carrying excavation loader, and its quality is far greater than that of an ordinary car, so in this invention The technical solution cannot be directly used to solve the technical problems proposed by the present invention; therefore, how to design a set of mechanisms to ensure the convenient driving and positioning of the mining loader while ensuring that it will not be damaged during use is an urgent problem to be solved by the present invention.

Contents of the invention

Aiming at the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide a large-scale crawler digging loader, which not only has a simple structure, but also can conveniently and quickly adjust the position of the chassis assembly according to the working conditions.

In order to solve the above technical problems, the present invention adopts such a large crawler excavation loader, which includes a chassis assembly, an excavation feeding device, a transport and unloading device, a cab, a hydraulic system and an electrical control system; the chassis The assembly is provided with a longitudinal traveling device for driving the chassis assembly to move back and forth and a transverse traveling device for driving the chassis assembly to move left and right, the transverse traveling device and the longitudinal traveling device are arranged perpendicular to each other; It is characterized in that: the chassis assembly is also provided with a hydraulic lifting device for adjusting the height of the lateral traveling device, the hydraulic lifting device includes a parallelogram mechanism and a crank rocker mechanism, one end of the parallelogram mechanism is connected to the chassis assembly One end of the crank rocker mechanism is hinged with the chassis assembly, and the other end is hinged with the parallelogram mechanism.

In a preferred embodiment of the present invention, the crank rocker mechanism includes a lifting cylinder and a connecting arm, the cylinder end of the lifting cylinder is hinged to the chassis assembly, and the piston rod end of the lifting cylinder is connected to the The end of the connecting arm is hinged, the middle of the connecting arm is hinged with the chassis assembly, and the end of the connecting arm is hinged with the parallelogram mechanism.

In a preferred embodiment of the present invention, the crank rocker mechanism includes a lifting cylinder and a connecting arm, the cylinder end of the lifting cylinder is hinged to the connecting arm, and the piston rod end of the lifting cylinder is connected to the connecting arm. The parallelogram mechanism is hinged, and one end of the connecting arm is fixedly connected to the chassis assembly.

In a preferred embodiment of the present invention, the transport and unloading device includes a transport trough skeleton, on which a drive roller assembly and a roller set are arranged, and the drive roller assembly passes through the idler roller set The transmission belt is connected by transmission; the transport tank skeleton is provided with a roller tensioning device for adjusting the tension of the transmission belt; the transport tank skeleton includes a front tank body and a rear tank body, and the front tank body is hinged to the rear tank body, A folding mechanism that can drive the rear tank to rotate relative to the front tank is provided between the front tank and the rear tank.

In a preferred embodiment of the present invention, the folding mechanism includes a first articulated arm, a first folding oil cylinder, a second articulated arm and a second folding oil cylinder, and the cylinder end of the second folding oil cylinder is connected to the front The tank body is hinged, the piston rod end of the second folding oil cylinder is hinged with the second hinged arm, one end of the second hinged arm is hinged with the front tank body, and the other end of the second hinged arm is hinged with the first hinged arm. The cylinder end of a folding oil cylinder is hinged, the piston rod end of the first folding oil cylinder is hinged with the first hinged arm, and the first hinged arm is fixedly connected with the rear tank body.

In a preferred embodiment of the present invention, the driving roller assembly includes a driving roller assembly and a driven roller assembly; the driven roller assembly is arranged at both ends of the transport tank skeleton, and the driving roller assembly is arranged at In the middle part of the transport tank skeleton, the driving roller assembly can move up and down under the action of the roller tensioning device.

In a preferred embodiment of the present invention, the roller tensioning device includes a tensioning oil cylinder and a guide rail, the active roller assembly is slidably connected to the guide rail, and the cylinder end of the tensioning oil cylinder is connected to the The frame of the transport tank is fixedly connected, and the piston rod end of the tensioning oil cylinder is connected with the driving roller assembly.

In a preferred embodiment of the present invention, the feed port of the transport tank skeleton is provided with a star wheel mechanism; the star wheel mechanism includes a drive motor and a rotary claw plate, and the fixed end of the drive motor is connected to the transport The groove frame is fixedly connected, and the output end of the drive motor is connected with the rotary claw disc.

In a preferred embodiment of the present invention, the feed inlet of the transport trough skeleton is provided with a set of carrying idler rollers and a set of buffer idler rollers.

In a preferred embodiment of the present invention, the digging and feeding device includes a bucket, a small arm, a boom and a slewing seat hinged in sequence; a bucket cylinder is connected between the bucket and the small arm, A forearm cylinder is connected between the forearm and the boom, and a boom cylinder is connected between the boom and the swivel seat; the swivel seat is fixedly connected to the chassis assembly.

The beneficial effect of the present invention is: the present invention is simple in structure, easy to use, and it has the function of lateral travel, when the present invention needs lateral travel, the lateral travel device is supported by the oil cylinder, walks to the desired position by the lateral travel crawler belt, effectively solves the problem of The parking position of the mining loader is not good, the loading position is unreasonable or the lateral movement is limited, so that the equipment can move to a reasonable position. The invention facilitates the lateral movement of the complete machine of the chassis assembly and the adjustment of the position of the chassis assembly by adding a set of lateral movement devices to the chassis assembly with the longitudinal movement device; The hydraulic lifting device of the crank rocker mechanism effectively ensures that the lateral traveling device can provide sufficient supporting force during use, and improves the safety and stability of the mining loader; the invention also designs two sets of cranks with different structures The rocker mechanism makes the hydraulic lifting device of the present invention suitable for chassis assemblies of various models, thereby increasing the versatility of the present invention; meanwhile, the present invention makes the transport tank skeleton a split structure and cooperates with the folding mechanism so that the present invention It can be applied to various types of loading vehicles, and at the same time, the loading height can be adjusted conveniently and quickly, so as to achieve a reasonable loading effect; by designing the folding mechanism as a double-stage oil cylinder telescopic structure, the rear tank body and the front tank can be The body is folded flat, and the total length of the whole machine can be shortened by about 5 meters, which is convenient for the transportation of the whole machine. At the same time, when the folding action is started, the oil cylinder driving the roller assembly is linked with the oil cylinder of the folding mechanism, and automatically tightens according to the folding range, without affecting normal work. At the same time, it also protects the belt from being broken; the present invention effectively improves the carrying capacity by setting a star wheel mechanism at the feeding port of the transport trough skeleton. Grips onto the belt of the belt transport chute for increased transport capacity.

Description of drawings

Fig. 1 is a schematic structural view of a large-scale crawler excavation type mining loader according to an embodiment of the present invention;

Fig. 2 is a schematic structural view of the digging and feeding device of a large crawler excavating loader according to an embodiment of the present invention;

Fig. 3 is a schematic diagram of the chassis assembly structure of a large crawler excavation mining loader according to an embodiment of the present invention;

Fig. 4 is a schematic structural diagram of a transport and unloading device of a large crawler excavation mining loader according to an embodiment of the present invention;

In the figure: A-chassis assembly; B-excavation loading device; C-transport and unloading device; D-cab; E-hydraulic system; F-electrical control system; A2-longitudinal traveling device; A3-transverse traveling device ;A4-hydraulic lifting device; A41-parallelogram mechanism; A42-crank rocker mechanism; A42-1-lift cylinder; A42-2-connecting arm; -Slewing seat; B5-Bucket cylinder; B6-Forearm cylinder; B7-Big arm cylinder; C1-Transport tank skeleton; C2-Drive drum assembly; C3-Idler roller group; C4-Drive belt; C6-folding mechanism; C7-carrying roller group; C8-buffer roller group; C9-sheath; C10-lift cylinder seat; C1.1-front tank; Active roller assembly; C2.2-driven roller assembly; C2.3-roller tensioning device; C2.3-1-tensioning oil cylinder; C2.3-2-guide rail; C5.1-drive motor; C5.2 C6.1-first articulated arm; C6.2-first folding cylinder; C6.3-second articulated arm; C6.4-second folding cylinder.

Detailed ways

In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

It can be seen from the large-scale crawler excavation mining loader shown in the accompanying drawings that it includes a large crawler excavation mining loader, which includes a chassis assembly A, an excavation loading device B, a transport and unloading device C, a driving Room D, hydraulic system E and electrical control system F; chassis assembly A is provided with a longitudinal travel device A2 for driving the chassis assembly A to move forward and backward and a lateral travel device A3 for driving the chassis assembly A to move left and right. The device A3 and the longitudinal traveling device A2 are arranged perpendicular to each other; the feature is that: the chassis assembly A is also provided with a hydraulic lifting device A4 for adjusting the height of the lateral traveling device A3, and the hydraulic lifting device A4 includes a parallelogram mechanism A41 and a crank rocker mechanism A42, one end of the parallelogram mechanism A41 is hinged to the chassis assembly A, and the other end is hinged to the transverse running device A3, one end of the crank rocker mechanism A42 is hinged to the chassis assembly A, and the other end is hinged to the parallelogram mechanism A41.

The chassis assembly A is provided with a longitudinal traveling device A2 for driving the chassis assembly A to move back and forth and a transverse traveling device A3 for driving the chassis assembly A to move left and right, the transverse traveling device A3 and the longitudinal traveling device A2 are arranged perpendicular to each other; the chassis The assembly A is also provided with a hydraulic lifting device A4 for adjusting the height of the lateral traveling device A3. The hydraulic lifting device A4 includes a parallelogram mechanism A41 and a crank rocker mechanism A42. One end of the parallelogram mechanism A41 is hinged with the chassis assembly A, and the other end is It is hinged with the transverse traveling device A3, one end of the crank rocker mechanism A42 is hinged with the chassis assembly A, and the other end is hinged with the parallelogram mechanism A41.

In the present invention, the structural design of the hydraulic lifting device A4 can adopt the following several technical solutions according to the requirements of the length of the mining loader. The structure of the block mechanism A42 structure:

The structure of the first crank rocker mechanism A42 is as follows: the crank rocker mechanism A42 includes a lift cylinder A42-1 and a connecting arm A42-2, the cylinder end of the lift cylinder A42-1 is hinged with the chassis assembly A, and the lift cylinder A42-1 The end of the piston rod of the connecting arm A42-2 is hinged with the end of the connecting arm A42-2, the middle part of the connecting arm A42-2 is hinged with the chassis assembly A, and the end of the connecting arm A42-2 is hinged with the parallelogram mechanism A41.

The structure of the second crank rocker mechanism A42 is as follows: the crank rocker mechanism A42 includes a lifting cylinder A42-1 and a connecting arm A42-2, the cylinder end of the lifting cylinder A42-1 is hinged with the connecting arm A42-2, and the lifting cylinder A42- The piston rod end of 1 is hinged with the parallelogram mechanism A41, and one end of the connecting arm A42-2 is fixedly connected with the chassis assembly A.

The structure of the hydraulic lifting device A4 can be two sets of the first crank rocker mechanism A42 or two sets of the second crank rocker mechanism A42 or one set of the first crank rocker mechanism A42 and the second crank rocker mechanism A42 The combined design of the crank rocker mechanism A42 of the above two different structures can be based on the fact that the hydraulic lifting device A4 can realize the free lifting of the lateral traveling device A3, that is, as long as the technical schemes that can satisfy the free lifting of the lateral traveling device A3 all belong to this The scope of protection claimed by the invention.

The longitudinal traveling device A2 of the present invention includes two crawler-type traveling devices, and the two crawler-type traveling devices are symmetrically arranged on the left and right sides of the chassis assembly A. The transverse traveling device A3 includes two crawler-type traveling devices, which are arranged symmetrically with the front and rear sides of the chassis assembly A. The present invention at least includes a longitudinal movement station and a transverse movement station; when the present invention is in the longitudinal movement station, the height of the transverse traveling device A3 is higher than the height of the longitudinal traveling device A2; when the present invention is in the transverse movement station, the transverse The height of running gear A3 is lower than the height of longitudinal running gear A2.

The transport and unloading device C includes a transport trough skeleton C1, on which a driving drum assembly C2 and an idler group C3 are arranged, and the driving drum assembly 2 and the idler group C3 are connected through a transmission belt C4; the transport chute skeleton C1 is provided with a The roller tensioning device C2.3 for adjusting the tension of the transmission belt C4; the transport tank skeleton C1 includes the front tank C1.1 and the rear tank C1.2, the front tank C1.1 and the rear tank C1.2 are hinged, the front tank C1.1 Between the tank body C1.1 and the rear tank body C1.2, there is a folding mechanism C6 that can drive the rear tank body C1.2 to rotate relative to the front tank body C1.1. The setting of the folding mechanism C6 is mainly to meet the needs of different loading vehicles. The loading height can be adjusted to achieve a reasonable loading effect. The folding mechanism C6 includes the first hinged arm C6.1, the first folding cylinder C6.2, the second hinged arm C6.3 and the second folding cylinder C6.4, the cylinder end of the second folding cylinder C6.4 and the front groove The body C1.1 is hinged, the piston rod end of the second folding oil cylinder C6.4 is hinged with the second hinged arm C6.3, one end of the second hinged arm C6.3 is hinged with the front tank body C1.1, and the second hinged arm C6. 3 The other end is hinged with the cylinder body end of the first folding cylinder C6.2, the piston rod end of the first folding cylinder C6.2 is hinged with the first hinged arm C6.1, and the first hinged arm C6.1 is hinged with the rear tank body C1 .2 Fixed connection; the first articulated arm C6.1 is L-shaped; the structural design of the two-stage oil cylinder of the present invention can ensure that the rear tank body and the front tank body are folded flat, so that the total length of the whole machine can be shortened by about 5 meters to facilitate the whole machine Transportation; when the folding action is started, the oil cylinder of the active roller tensioning device and the oil cylinder of the folding mechanism are linked to automatically tension according to the folding range, which does not affect the normal work, and at the same time protects the belt from being broken. The driving roller assembly C2 includes a driving roller assembly C2.1 and a driven roller assembly C2.2; the driven roller assembly C2.2 is arranged at both ends of the transport tank skeleton C1, and the driving roller assembly C2.1 is arranged at the end of the transport tank skeleton C1 In the middle, the driving roller assembly C2.1 can move up and down under the action of the roller tensioning device C2.3. Roller tensioning device C2.3 includes tensioning oil cylinder C2.3-1 and guide rail C2.3-2. The cylinder end of the cylinder is fixedly connected with the transport tank skeleton C1, and the piston rod end of the tensioning cylinder C2.3-1 is connected with the driving roller assembly C2.1. The feed port of the transport trough skeleton C1 is equipped with a star wheel mechanism C5. The main purpose of the star wheel assembly is to increase the carrying capacity. It rotates the left and right star wheels counter-rotating to scrape the stones around the shovel plate onto the belt of the belt transport trough. Thereby increasing transportation capacity. The star wheel mechanism C5 includes the drive motor C5.1 and the rotary claw plate C5.2, the fixed end of the drive motor C5.1 is fixedly connected to the transport tank frame C1, and the output end of the drive motor C5.1 is connected to the rotary claw plate C5.2 . The feeding port of the transport trough skeleton C1 is provided with a set of carrying idlers C7 and a set of buffer idlers C8. A sheath C9 is provided on the transport tank skeleton C1. The transport tank frame C1 is provided with a lift cylinder base C10, which controls the expansion and contraction of the lift cylinder (connected with the lift cylinder base C10) to make the transport tank lift up and down to meet the needs of different working conditions. The present invention adopts the above-mentioned foldable belt conveyor transport mechanism, which reduces dust pollution caused by flying dust when loading and unloading ores.

The excavating and feeding device B of the present invention includes a bucket B1, a small arm B2, a large arm B3 and a revolving seat B4 which are sequentially articulated; a bucket oil cylinder B5 is connected between the bucket B1 and the small arm B2, and the small arm B2 and the large arm A forearm cylinder B6 is connected between B3, and a boom cylinder B7 is connected between the boom B3 and the swivel seat B4; the swivel seat B4 is fixedly connected to the chassis assembly A.

This product is controlled by a fully computerized program system, with unmanned control and remote control functions. While realizing easy and convenient operation, it also greatly reduces labor costs. The motor drive noise of this product is about 60 decibels, far lower than the 120 decibels of conventional fuel-based loaders, and will hardly affect the surrounding residents. This product uses a belt conveyor to transport ore. When loading and unloading ore, the tail of the belt conveyor can be folded and loaded from the bottom of the car box, which reduces the height of loading and unloading dust. Compared with the previous loader loading and unloading, the dust pollution on the site is greatly reduced. This product adopts double-set crawler travel mechanism, which is composed of main crawler travel mechanism and lateral crawler travel mechanism. When the equipment is working normally, the horizontal crawler travel mechanism is received by the oil cylinder into the equipment chassis without affecting The normal operation of the main crawler running mechanism; when the equipment needs to move laterally, the oil circuit is switched to the horizontal crawler running mechanism through the solenoid valve, and the horizontal crawler running mechanism is pushed out by the oil cylinder, and at the same time it is higher than the main crawler running mechanism to realize lateral travel. This mechanism is mainly to solve the problems of poor parking position of the car, unreasonable loading position, and the equipment needs to be moved back and forth when it needs to move laterally, so that the equipment can move to a reasonable and optimal position. The horizontal walking part of the present invention is mainly a device for facilitating the lateral movement of the whole machine. It is pushed out to the ground by a hydraulic cylinder until the main walking part is suspended for about 300mm. The walking part moves down 5 times each to achieve the purpose of the main walking part suspended in the air, so as to realize the function of the whole machine to move laterally. When the horizontal walking function is not needed, the control button in the cab is operated by one key, and the front and rear horizontal walking parts are retracted through the hydraulic cylinder, which is also 300mm above the ground, which does not affect the normal use of the main walking part. The horizontal travel adopts a double-link structure of the same size. When the mechanism is raised and lowered, the lateral travel mechanism is always kept parallel to the whole machine to meet the normal function of the equipment.

The present invention has following characteristics:

1. Fully computerized program system control, realize unmanned control and remote control functions, and can meet the manual and automatic operation of equipment, realize the characteristics of easy, convenient, comfortable and fast operation, and also greatly reduce labor costs;

2. The product has a continuous loading function, and its efficiency far exceeds that of similar products;

3. The product can replace all functions of existing excavators, loaders, and slag removers;

4. The product is driven by electric frequency conversion control, which has low energy consumption cost and low working noise;

5. The foldable belt conveyor transport mechanism is adopted to reduce the dust pollution caused by flying dust when loading and unloading ore;

6. The product has the function of lateral travel. When the equipment needs to travel laterally, the lateral travel mechanism is supported by the oil cylinder, and it travels to the required position by the lateral travel crawler, which can solve the problem of poor parking position of the car, unreasonable loading position or limited lateral movement, etc. So that the equipment moves to a reasonable position.

It should be understood that the above are only specific implementations of the present invention, but the scope of protection of the present invention is not limited thereto. Any skilled person in the art can easily think of changes or Replacement should be covered within the protection scope of the present invention.

Claims (10)

1. A large crawler digging loader, including chassis assembly (A), digging and loading device (B), transport and unloading device (C), cab (D), hydraulic system (E) and electrical control System (F); the chassis assembly (A) is provided with a longitudinal travel device (A2) for driving the chassis assembly (A) to move forward and backward and a device for driving the chassis assembly (A) to move left and right The horizontal running device (A3), the vertical running device (A2) and the horizontal running device (A3) are arranged perpendicular to each other; it is characterized in that: the chassis assembly (A) is also provided with a horizontal running device ( A3) The height hydraulic lifting device (A4), the hydraulic lifting device (A4) includes a parallelogram mechanism (A41) and a crank rocker mechanism (A42), and one end of the parallelogram mechanism (A41) is connected to the chassis assembly (A) hinged, the other end of which is hinged with the transverse traveling device (A3), one end of the crank rocker mechanism (A42) is hinged with the chassis assembly (A), and the other end is hinged with the parallelogram mechanism (A41) hinged. 2. A large crawler excavation type mining loader according to claim 1, characterized in that: the crank rocker mechanism (A42) includes a lifting cylinder (A42-1) and a connecting arm (A42-2), the The cylinder body end of the lifting cylinder (A42-1) is hinged to the chassis assembly (A), the piston rod end of the lifting cylinder (A42-1) is hinged to the end of the connecting arm (A42-2), The middle part of the connecting arm (A42-2) is hinged with the chassis assembly (A), and the end part of the connecting arm (A42-2) is hinged with the parallelogram mechanism (A41). 3. A large crawler excavation type mining loader according to claim 1, characterized in that: the crank rocker mechanism (A42) includes a lifting cylinder (A42-1) and a connecting arm (A42-2), the The cylinder end of the lift cylinder (A42-1) is hinged to the connecting arm (A42-2), the piston rod end of the lift cylinder (A42-1) is hinged to the parallelogram mechanism (A41), and the connection One end of the arm (A42-2) is fixedly connected to the chassis assembly (A). 4. A large crawler excavation type mining loader according to claim 1, characterized in that: the transport and unloading device (C) comprises a transport trough skeleton (C1), and the transport trough skeleton (C1) is provided with The driving drum assembly (C2) and the idler roller group (C3), the driving drum assembly (C2) and the idler roller group (C3) are connected through a transmission belt (C4); the transport trough skeleton (C1) is provided with The roller tensioning device (C2.3) for adjusting the tension of the transmission belt (C4); the transport tank skeleton (C1) includes a front tank body (C1.1) and a rear tank body (C1.2), The body (C1.1) is hinged to the rear trough (C1.2), and there is a device between the front trough (C1.1) and the rear trough (C1.2) that can drive the rear trough A folding mechanism (C6) for the body (C1.2) to rotate relative to the front tank body (C1.1). 5. A large crawler digging loader according to claim 4, characterized in that: the folding mechanism (C6) includes a first articulated arm (C6.1), a first folding cylinder (C6.2), The second articulated arm (C6.3) and the second folding oil cylinder (C6.4), the cylinder end of the second folding oil cylinder (C6.4) is hinged with the front tank body (C1.1), and the The piston rod end of the second folding oil cylinder (C6.4) is hinged to the second articulated arm (C6.3), and one end of the second articulated arm (C6.3) is connected to the front tank (C1.1) Hinged, the other end of the second articulated arm (C6.3) is hinged with the cylinder end of the first folding oil cylinder (C6.2), and the piston rod end of the first folding oil cylinder (C6.2) is connected with the cylinder end of the first folding oil cylinder (C6.2) The first articulated arm (C6.1) is articulated, and the first articulated arm (C6.1) is fixedly connected to the rear tank body (C1.2). 6. A large crawler excavation loader according to claim 4, characterized in that: the driving drum assembly (C2) includes a driving drum assembly (C2.1) and a driven drum assembly (C2.2); The driven roller assembly (C2.2) is arranged at both ends of the transport trough skeleton (C1), the driving roller assembly (C2.1) is arranged in the middle of the transport trough skeleton (C1), and the The active roller assembly (C2.1) can move up and down under the action of the roller tensioning device (C2.3). 7. A large crawler excavation type mining loader according to claim 4, characterized in that: the drum tensioning device (C2.3) includes a tensioning oil cylinder (C2.3-1) and a guide rail (C2.3 -2), the driving roller assembly (C2.1) is slidingly connected to the guide rail (C2.3-2), and the cylinder end of the tensioning oil cylinder (C2.3-1) is connected to the transport The groove skeleton (C1) is fixedly connected, and the piston rod end of the tensioning oil cylinder (C2.3-1) is connected with the driving roller assembly (C2.1). 8. A kind of large-scale crawler excavation type mining loader according to claim 4, is characterized in that: the feed inlet of described transport trough skeleton (C1) is provided with starwheel mechanism (C5); Said starwheel mechanism (C5 ) includes a drive motor (C5.1) and a rotary claw plate (C5.2), the fixed end of the drive motor (C5.1) is fixedly connected to the transport tank skeleton (C1), and the drive motor (C5. 1) The output end is connected with the rotary claw disc (C5.2). 9. A kind of large-scale crawler excavation type mining loader according to claim 4, is characterized in that: the feed inlet of described transport trough skeleton (C1) is provided with bearing idler group (C7) and buffer idler group ( C8). 10. A large crawler excavation loader according to claim 1, characterized in that: the excavation feeding device (B) comprises a bucket (B1), a small arm (B2), a boom ( B3) and the slewing seat (B4); a bucket cylinder (B5) is connected between the bucket (B1) and the arm (B2), and the arm (B2) and the boom (B3) A forearm oil cylinder (B6) is connected between them, and a boom oil cylinder (B7) is connected between the boom (B3) and the slewing seat (B4); the slewing seat (B4) and the chassis assembly (A) fixed connection.