Pneumatic crawler forklift and method

Abstract

The present invention discloses a pneumatic crawler forklift and method, the forklift comprises: an operating platform, a walking crawler assembly, a vehicle chassis, a forklift gantry assembly, a power assembly and a hydraulic oil tank assembly; the crawler walking mechanism is adopted, hydraulic transmission, strong climbing ability, reliable braking, and adaptable to the bad road surface of underground tunneling. The forklift gantry is adopted, which not only has the auxiliary transportation function of materials and equipment, but also has the loading and unloading function of materials and equipment, realizes the neat stacking of materials and equipment, improves the safety quality standardization level of underground operation, greatly improves the work efficiency of underground personnel, reduces labor intensity, and ensures personal safety.

Description

Technical Field

[0001] The invention belongs to the technical field of transportation tools, and in particular relates to a pneumatic crawler forklift and a method. Background Art

[0002] Existing modern coal mine auxiliary transportation vehicles use explosion-proof diesel rubber-wheeled vehicles, which have the problems of high fuel consumption, environmental pollution caused by diesel combustion exhaust, and even excessive carbon monoxide safety issues, and are large in size. When equipment such as belt conveyors are running in the tunnels, the explosion-proof diesel vehicles cannot directly transport the materials required for the excavation working face and the mining working face to the underground working tunnels after transporting them to the working face. There is often a remaining distance of at least 200 meters, and manual labor is required to carry the supporting materials and tools such as anchor rods, anchoring agents, pipelines, pallets, anchor cables, etc. required for the working face to the work position. The work efficiency is low, the labor intensity is high, and personal injuries are likely to occur. Material transportation is one of the key influencing factors of support speed and excavation advance.

[0003] In the existing underground pipeline installation project, the pipeline is transported to the installation site by an explosion-proof diesel rubber-wheeled vehicle, the pipeline is aligned with a crowbar, the bolts are manually connected, and then the two ends of the pipeline are installed and lifted with a hand winch. Before the hand winch is used, a suspension anchor rod needs to be constructed on the top of the tunnel where the pipeline is installed. The process is complicated, the labor intensity is high, the work efficiency is very low, and it involves personnel safety issues.

[0004] When the tunnel boring machine, scraper conveyor and belt conveyor at the excavation working face break down, the main equipment parts need to be disassembled and transported to the mine for maintenance. Or when the excavation working face is changed, the scraper conveyor and belt conveyor need to be disassembled and transported to the new excavation working face. Currently, they are mainly pulled out 200 meters outside the excavation working face by manual hand winch, and then loaded with explosion-proof loaders. The labor intensity is high, the work efficiency is very low and it involves personnel safety issues. Summary of the invention

[0005] The object of the present invention is to provide a pneumatic crawler forklift and a method to solve the problem of high labor intensity in manual transportation of accessories in the prior art.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A first aspect of the present invention provides a pneumatic crawler forklift, comprising: an operating platform, a walking crawler assembly, a vehicle chassis, a forklift mast assembly, a power assembly and a hydraulic oil tank assembly;

[0008] The walking crawler assembly includes a main walking frame, crawlers and a front beam of the crawler assembly, the two crawlers are respectively installed on the left and right sides of the main walking frame, and the front beam of the crawler assembly is installed on the front side of the main walking frame;

[0009] The vehicle chassis is mounted on the main body walking bracket;

[0010] The forklift mast assembly includes a fork head, a mast, a fork frame, a lifting cylinder and a tilting cylinder;

[0011] The bottom end of the mast is mounted on the front beam of the crawler assembly through a pin shaft; the fork frame is mounted on the mast in a manner that it can slide up and down, and the fork frame is connected to the lifting cylinder, the lifting cylinder is mounted at the bottom of the mast, and the fork head is mounted on the fork frame; the middle part of the mast is connected to the power output side of the tilt cylinder, and the tilt cylinder is mounted on the vehicle chassis;

[0012] The power assembly and the hydraulic oil tank assembly are mounted on the vehicle chassis;

[0013] The power assembly includes a gear oil pump and a power pneumatic motor; the hydraulic oil tank assembly includes an oil tank body, an oil suction filter and an oil return filter;

[0014] The gear oil pump is connected to the oil tank body, the oil suction filter is connected to the oil inlet side of the gear oil pump and the oil outlet side of the oil tank body respectively, and the return oil filter is installed on the return oil side of the oil tank body; the output shaft of the power pneumatic motor is connected to the input shaft of the gear oil pump, and the oil tank body is connected to: the lifting cylinder and the tilting cylinder through the gear oil pump;

[0015] A multi-way reversing valve is arranged on the operating table, and the multi-way reversing valve is used to control the oil delivery route of the oil tank body.

[0016] Optionally, a driver standing foot pedal is provided at the rear side of the operating console.

[0017] Optionally, the output shaft of the power pneumatic motor is key-connected to the input shaft of the gear oil pump.

[0018] Optionally, a muffler is installed at the exhaust port of the power pneumatic motor.

[0019] Optionally, a cast iron shield is installed at the connection between the output shaft of the power pneumatic motor and the input shaft of the gear oil pump.

[0020] Optionally, driving wheels, track drive motors and reducers are respectively installed on the left and right sides of the main walking bracket, and the track drive motor is connected to the driving wheels after being reduced in speed by the reducer; two tracks are respectively installed on the driving wheels on the left and right sides of the main walking bracket.

[0021] Optionally, the operating platform also includes a support frame, the multi-way reversing valve is arranged on the support frame, and the support frame is located at the rear of the vehicle chassis.

[0022] Optionally, a rotator is provided at the bottom of the vehicle chassis, which is installed on the main walking bracket and is used to drive the vehicle chassis to rotate through a slewing hydraulic motor. The hydraulic oil tank assembly is connected to the slewing hydraulic motor through a gear oil pump.

[0023] It also includes a remote control transmitter, a remote control receiver, a battery pack, a generator voltage regulator, a permanent magnet generator, a generator air motor and an air intake shutoff valve;

[0024] The remote control transmitter is wirelessly connected to the remote control receiver for sending control instructions to the remote control receiver. The signal output end of the remote control receiver is electrically connected to the drive output module via the CAN bus module, and the drive output module is electrically connected to the signal input end of the multi-way reversing valve.

[0025] The oil pipeline of the oil tank body is connected to the multi-way reversing valve after passing through the gear oil pump, and then connected to the rotary hydraulic motor, crawler drive motor, lifting cylinder and tilting cylinder respectively;

[0026] The output shaft of the power pneumatic motor is connected to the input shaft of the gear oil pump to provide power to the gear oil pump;

[0027] The battery pack is respectively connected to the electromagnetic coil of the remote control receiver and the multi-way reversing valve to supply power to the electromagnetic coil of the remote control receiver and the multi-way reversing valve; the permanent magnet generator is connected to the battery pack to charge the battery pack after passing through the generator voltage regulator;

[0028] The permanent magnet generator is coaxially connected to the generator pneumatic motor, and the generator pneumatic motor is used to drive the rotor part of the permanent magnet generator to rotate and cut the magnetic lines of force to generate electricity;

[0029] The air intake shut-off valve is installed on the air intake side of the generator air motor and can cut off the air intake of the generator air motor.

[0030] A second aspect of the present invention provides a remote control operation method based on the above-mentioned pneumatic crawler forklift, comprising the following operation steps:

[0031] STEP1: Check whether the battery pack is fully charged. If so, proceed to STEP5; if not, proceed to STEP2;

[0032] STEP2: Open the air intake stop valve of the generator air motor, the generator air motor runs, and the permanent magnet generator generates electricity;

[0033] STEP3: The permanent magnet generator charges the battery pack through the generator voltage regulator;

[0034] STEP4: After the battery pack is fully charged, close the air intake stop valve of the generator pneumatic motor to stop charging the battery pack;

[0035] STEP5: Check whether the remote control transmitter and remote control receiver can communicate with each other normally; if so, proceed to STEP6; if not, proceed to STEP9;

[0036] STEP6: Check the oil tank body to see if the oil level is normal, turn on the power pneumatic motor to drive the gear oil pump to operate;

[0037] STEP7: Operate the remote control transmitter button to check whether the multi-way reversing valve operates normally. If so, proceed to STEP8. If not, proceed to STEP9.

[0038] STEP8: The crawler drive motor executes forward, backward, front left turn, front right turn, rear left turn, and rear right turn according to the command; the lifting cylinder and tilting cylinder execute lifting and lowering, forward tilting and backward tilting actions according to the command;

[0039] STEP 9: Operate the multi-way reversing valve, and the crawler drive motor executes forward, backward, front left turn, front right turn, rear left turn, and rear right turn; the lifting cylinder and tilt cylinder execute lifting and lowering, forward and backward tilting actions according to the instructions.

[0040] The beneficial effects of the present invention are as follows:

[0041] The pneumatic crawler forklift provided in the embodiment of the present invention adopts a crawler walking mechanism, hydraulic transmission, strong climbing ability, reliable braking, and is suitable for the bad road surface of underground tunneling. The forklift gantry not only has the auxiliary transportation function of materials and equipment, but also has the loading and unloading function of materials and equipment, so that materials and equipment can be neatly stacked, the safety quality standardization level of underground operations is improved, the work efficiency of underground personnel is greatly improved, the labor intensity is reduced, and personal safety is guaranteed.

[0042] The pneumatic crawler forklift provided in the embodiment of the present invention uses compressed air as a power source, which is green, environmentally friendly, energy-saving, explosion-proof and reliable. In addition, the compressed air pipelines on the sides of the underground excavation tunnels and transportation tunnels are extended along with the excavation and development project, making it convenient to use compressed air.

[0043] The pneumatic crawler forklift provided in the embodiment of the present invention can perform forward operation, side operation or forward and side operation sequentially. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0045] Figure 1 A schematic structural diagram of a pneumatic crawler forklift provided in an embodiment of the present invention.

[0046] Figure 2Schematic diagram of the vehicle chassis structure in an embodiment of the present invention.

[0047] Figure 3 Schematic diagram of tripod installation in an embodiment of the present invention.

[0048] Figure 4 A schematic structural diagram of a pneumatic crawler forklift with a rotator provided in an embodiment of the present invention.

[0049] Figure 5 It is a schematic diagram of the installation of the gyrator in the embodiment of the present invention.

[0050] Figure 6 This is a schematic diagram of an embodiment of the present invention in which a door frame is directly installed on a vehicle chassis.

[0051] Figure 7 Schematic diagram of the oil circuit in the embodiment of the present invention.

[0052] Figure 8 Schematic diagram of remote control principle in an embodiment of the present invention.

[0053] Fig. 9 Flow chart of the remote control method in an embodiment of the present invention.

[0054] In the attached drawings, 1-fork head; 2-hydraulic oil tank assembly; 3-gantry; 4-tilt cylinder; 5-operating handrail; 6-multi-way reversing valve; 7-driver standing foot pedal; 8-operating table; 9-walking crawler assembly; 10-vehicle chassis; 11-crawler drive motor; 12-gear oil pump; 13-power pneumatic motor; 15-tripod; 16-pin shaft; 17 crawler assembly front beam; 20-power assembly; 21 long pin shaft; 22-tank body; 23-rotator; 231 rotary hydraulic motor; 24-bidirectional hydraulic lock; 25-lifting cylinder; 26-explosion-proof valve; 27-cylinder multi-way valve; 28-check valve; 29-oil suction filter; 30-high and low speed valves; 31-motor multi-way valve; 40-remote control transmitter; 41-remote control receiver; 42-battery pack; 43-generator voltage regulator; 44-permanent magnet generator; 45-generator pneumatic motor; 46-intake stop valve. DETAILED DESCRIPTION

[0055] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0056] The following detailed description is an exemplary description, which is intended to provide further detailed description of the present invention. Unless otherwise specified, all technical terms used in the present invention have the same meaning as those generally understood by those skilled in the art to which the present application belongs. The terms used in the present invention are only for describing specific embodiments, and are not intended to limit exemplary embodiments according to the present invention.

[0057] The embodiment of the present invention provides a pneumatic crawler forklift with a width of less than 1 meter, a crawler length of less than 1.3 meters, and a small turning radius, which is suitable for operations in narrow tunnels and limited spaces in mines.

[0058] like Figures 1 to 5 As shown, the forklift includes: an operating platform 8, a walking crawler assembly 9, a vehicle chassis 10, a forklift mast assembly, a power assembly 20 and a hydraulic oil tank assembly 2; the walking crawler assembly 9 includes a main walking bracket, a crawler and a crawler assembly front beam 17, two crawlers are respectively installed on the left and right sides of the main walking bracket, and the crawler assembly front beam 17 is installed on the front side of the main walking bracket; the vehicle chassis 10 is installed on the main walking bracket; the forklift mast assembly includes a mast 3, a fork frame, a fork head 1, a lifting cylinder 25 and a tilting cylinder 4; the bottom end of the mast 3 is connected by a pin 1 6 is installed on the front beam 17 of the crawler assembly; in other embodiments, a tripod 15 is installed on the front beam 17 of the crawler assembly, and the bottom end of the gantry 3 is installed on the tripod 15 through a pin shaft 16; the fork frame is installed on the gantry 3 in a form that it can slide up and down, and the fork frame is connected to the lifting cylinder 25, the lifting cylinder 25 is installed at the bottom of the gantry 3, and the fork head 1 is installed on the fork frame; the middle part of the gantry 3 is connected to the tilt cylinder 4, and the tilt cylinder 4 is installed on the vehicle chassis 10; the power assembly 20 and the hydraulic oil tank assembly 2 are installed on the vehicle chassis 10.

[0059] In some other embodiments, the vehicle chassis 10 is mounted on the front beam 17 and the rear beam of the crawler track assembly of the traveling crawler track assembly 9 by means of high-strength bolts.

[0060] In a specific embodiment of the present invention, the door frame 3 is a door-type frame, and corresponding slide rails are respectively arranged on opposite sides of its two vertical frames. The fork frame is installed in the slide rails in a form that it can slide up and down, and the bottom of the fork frame is connected to the lifting cylinder 25. The lifting cylinder 25 is installed at the bottom of the door frame 3 and is used to control the lifting and lowering of the fork frame. The fork head 1 is installed on the fork frame, and the lifting and lowering in height is controlled by the lifting cylinder 25.

[0061] In some other embodiments, the operating platform 8 includes a support frame and a multi-way reversing valve 6, the support frame is located at the rear of the vehicle chassis 10, and the multi-way reversing valve 6 is used to control the oil delivery route of the oil tank body 22. A driver standing foot pedal 7 is arranged behind the operating platform 8, and an operating armrest 5 is installed at the top of the operating platform 8.

[0062] like Figure 2 As shown, a specific embodiment of the present invention is applied, the power assembly 20 includes a gear oil pump 12 and a power pneumatic motor 13; the power pneumatic motor 13 and the gear oil pump 12 are installed in the vehicle chassis 10, and the vehicle chassis 10 is installed on the main traveling support.

[0063] Specifically, the hydraulic oil tank assembly 2 includes an oil suction filter 29, an oil return filter, an air filter, a liquid level gauge, and an oil tank body 22. Figure 7 As shown, the gear oil pump 12 is connected to the oil tank body 22, the oil suction filter 29 is connected to the oil inlet side of the gear oil pump 12 and the oil outlet side of the oil tank body 22 respectively, and the return oil filter is installed on the return oil side of the oil tank body 22. The air filter and the liquid level gauge are installed on the oil tank body 22. The oil tank body 22 is installed on the vehicle chassis 10 by bolts. The output shaft of the power pneumatic motor 13 is connected to the input shaft of the gear oil pump 12, and the oil delivery pipeline of the oil tank body 22 is connected to the lifting cylinder 25, the tilting cylinder 4 and the crawler drive motor 11 respectively through the gear oil pump 12 through the check valve 28 and the cylinder multi-way valve 27. Among them, the explosion-proof valve 26 and the two-way hydraulic lock 24 are arranged on the oil inlet and outlet sides of the lifting cylinder 25 in turn. The two-way hydraulic lock is also arranged on the oil inlet and outlet sides of the tilting cylinder 4. Specifically, the cylinder multi-way valve 27 is connected to the two-way hydraulic lock of the lifting cylinder and the two-way hydraulic lock of the tilt cylinder through hydraulic pipelines; the two-way hydraulic lock 24 of the lifting cylinder is connected to the explosion-proof valve 26 of the lifting cylinder through hydraulic pipelines; the explosion-proof valve 26 of the lifting cylinder is connected to the lifting cylinder 25 through pipelines; the two-way hydraulic lock of the tilt cylinder is connected to the tilt cylinder 4 through pipelines.

[0064] In the above technical solution, a travel motor multi-way valve 31 is provided on the oil inlet side of the track drive motor 11. In some other embodiments, the oil delivery pipeline of the oil tank body 22 is directly connected to a high-speed and low-speed valve 30 through the oil cylinder multi-way valve 27, and the high-speed and low-speed valve 30 is connected to the speed regulating oil port of the track drive motor 11 through a hydraulic pipeline.

[0065] As an example of an embodiment of the present invention, the output shaft of the power pneumatic motor 13 is keyed to the input shaft of the gear oil pump 12. In some other embodiments, a cast iron shield is installed at the connection between the output shaft of the power pneumatic motor 13 and the input shaft of the gear oil pump 12 as a rotation protection device.

[0066] As a more specific example of an embodiment of the present invention, the output shaft of the power pneumatic motor 13 and the input shaft of the gear oil pump 12 are connected by a flat key or a spline.

[0067] In some other embodiments, a muffler is installed at the exhaust port of the power pneumatic motor 13.

[0068] like Figure 2As shown in the figure, a specific embodiment of the present invention is applied, the driving wheels, the track driving motor 11 and the reducer are respectively installed on the left and right sides of the main traveling frame, and the track driving motor 11 is connected to the driving wheels after being reduced by the reducer; the two tracks are respectively installed on the driving wheels on the left and right sides of the main traveling frame. In some other embodiments, the left and right sides of the main traveling frame are respectively installed with left and right guide wheels and left and right tensioning devices for the tracks; the bottom of the main traveling frame is installed with supporting wheels, and the upper part is installed with supporting sprocket wheels.

[0069] like Figure 4 As shown, in a preferred embodiment of the present invention, a rotator 23 is provided at the bottom of the vehicle chassis 10, and the rotator 23 is installed on the main walking bracket, and is used to drive the vehicle chassis 10 to rotate through a rotary hydraulic motor 231, and the hydraulic oil tank assembly 2 is connected to the rotary hydraulic motor 231 through a gear oil pump.

[0070] like Figure 6 As shown, in some other embodiments of the present invention, the bottom of the door frame 3 is directly connected to the vehicle chassis 10 by a long pin shaft 21.

[0071] In some other embodiments, the present invention also provides a gas-electric-hydraulic remote control system for controlling the oil cylinder and motor in the above solution. Figure 8 As shown, it mainly includes a remote control transmitter 40, a remote control receiver 41, a battery pack 42, a generator voltage regulator 43, a permanent magnet generator 44, a generator pneumatic motor 45 and an intake stop valve 46.

[0072] The remote control transmitter 40 is wirelessly connected to the remote control receiver 41, and by sending control instructions to the remote control receiver 41, the functions of simultaneous forward movement of the left and right tracks, simultaneous backward movement of the left track, right turn of the track, left unloading, and right unloading are realized.

[0073] The remote control receiver 41 has a remote control and local switching operation switching function, and switches to local operation when the remote control transmitter 40 is powered off, loading process or stopped. In some other embodiments, the remote control transmitter 40 is also provided with power, emergency stop, forward, backward, left front turn, right front turn, left rear turn, right rear turn, lifting, lowering, forward tilt, backward tilt, power generation, power failure, high speed, low speed, confirmation, and cancel buttons.

[0074] The power supply side of the remote control receiver 41 is connected to the battery pack 42 , the signal output end of the remote control receiver 41 is electrically connected to the drive output module via the CAN bus module, and the drive output module is electrically connected to the signal input end of the multi-way reversing valve 6 .

[0075] The oil pipeline of the oil tank body 22 is connected to the multi-way reversing valve 6 after passing through the gear oil pump 12, and then respectively connected to the rotary hydraulic motor 231, the crawler drive motor 11, the lifting cylinder 25 and the tilting cylinder 4. As an example, in this embodiment, the multi-way reversing valve 6 adopts an electromagnetic hydraulic multi-way valve.

[0076] The output shaft of the power pneumatic motor 13 is connected to the input shaft of the gear oil pump 12 to provide power for the gear oil pump 12 .

[0077] The battery pack 42 is connected to the remote control receiver 41 and the electromagnetic coil of the multi-way reversing valve 6 through explosion-proof cables, and is used to power the remote control receiver 41 and the electromagnetic coil of the multi-way reversing valve 6. In some other embodiments, the battery pack 42 also provides electricity for lighting.

[0078] The permanent magnet generator 44 is connected to the battery pack 42 via an explosion-proof cable, and charges the battery pack 42 after passing through the generator voltage regulator 43 .

[0079] The permanent magnet generator 44 is coaxially connected to the generator air motor 45 , and the generator air motor 45 drives the rotor part of the permanent magnet generator 44 to rotate and cut the magnetic lines of force to generate electricity.

[0080] The air intake stop valve 46 is installed on the air intake side of the generator air motor 45 , can cut off the air intake of the generator air motor 45 , and is connected to the air intake port of the generator air motor 45 .

[0081] like Fig. 9 As shown, based on the above-mentioned gas-electric-hydraulic remote control system, an embodiment of the present invention further provides a remote control operation method,

[0082] STEP 1: Check whether the battery pack 42 is sufficiently charged. If so, proceed to STEP 5. If not, proceed to STEP 2.

[0083] STEP 2: Open the air intake stop valve 46 of the generator air motor 45, the generator air motor 45 runs, and the generator 44 generates electricity;

[0084] STEP 3: The permanent magnet generator 44 charges the battery pack 42 via the generator voltage regulator 43;

[0085] STEP 4: After the battery pack 42 is fully charged, the air intake stop valve 46 of the generator air motor 45 is closed to stop charging the battery pack 42;

[0086] STEP5: Check whether the remote control transmitter 40 and the remote control receiver 41 communicate with each other normally; if so, execute STEP6; if not, execute STEP9;

[0087] STEP6: Check the oil tank body 22 to see if the oil level is normal, open the inlet stop valve of the power pneumatic motor 13, the power pneumatic motor drives the gear oil pump 12 to operate, and the hydraulic system oil supply is normal;

[0088] STEP7: Operate the remote control transmitter 40 button to check whether the multi-way reversing valve 6 operates normally. If so, proceed to STEP8. If not, proceed to STEP9.

[0089] STEP8: The crawler drive motor 11 executes forward, backward, front left turn, front right turn, rear left turn and rear right turn actions according to the instructions; the lifting cylinder 25 and the tilting cylinder 4 execute lifting and lowering, forward and backward tilting actions according to the instructions.

[0090] STEP9: Manually operate the multi-way reversing valve 6, and the crawler drive motor 11 performs forward, backward, front left turn, front right turn, rear left turn, and rear right turn actions; the lifting cylinder 25 and the tilting cylinder 4 perform lifting and lowering, forward and backward tilting actions according to the instructions.

[0091] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the above disclosed embodiments are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A pneumatic crawler forklift, characterized in that: include: An operating platform (8), a walking track assembly (9), a vehicle chassis (10), a forklift mast assembly, a power assembly (20) and a hydraulic oil tank assembly (2); The walking crawler assembly (9) comprises a main walking frame, crawlers and a crawler assembly front beam (17), wherein the two crawlers are respectively installed on the left and right sides of the main walking frame, and the crawler assembly front beam (17) is installed on the front side of the main walking frame; The vehicle chassis (10) is mounted on the main body walking support; The forklift mast assembly comprises a fork head (1), a mast (3), a fork frame, a lifting cylinder (25) and a tilting cylinder (4); The bottom end of the mast (3) is mounted on the front beam (17) of the crawler assembly via a pin shaft (16); the fork frame is mounted on the mast (3) in a manner capable of sliding up and down, and the fork frame is connected to the lifting cylinder (25), the lifting cylinder (25) is mounted at the bottom of the mast (3), and the fork head (1) is mounted on the fork frame; the middle of the mast (3) is connected to the power output side of the tilt cylinder (4), and the tilt cylinder (4) is mounted on the vehicle chassis (10); The power assembly (20) and the hydraulic oil tank assembly (2) are mounted on the vehicle chassis (10); the power assembly (20) comprises a gear oil pump (12) and a power pneumatic motor (13); the hydraulic oil tank assembly (2) comprises a tank body (22); the gear oil pump (12) is connected to the tank body (22); the output shaft of the power pneumatic motor (13) is connected to the input shaft of the gear oil pump (12); the tank body (22) is connected to the lifting cylinder (25) and the tilting cylinder (4) through the gear oil pump (12); The operating table (8) is provided with a multi-way reversing valve (6), and the multi-way reversing valve (6) is used to control the oil delivery route of the oil tank body (22); The left and right sides of the main body walking frame are respectively equipped with a driving wheel, a crawler driving motor (11) and a reducer, and the crawler driving motor (11) is connected to the driving wheel after being reduced in speed by the reducer; two crawlers are respectively installed on the driving wheels on the left and right sides of the main body walking frame; A rotator (23) is provided at the bottom of the vehicle chassis (10), and the rotator (23) is installed on the main body walking bracket and is used to drive the vehicle chassis (10) to rotate through a rotary hydraulic motor (231), and the hydraulic oil tank assembly (2) is connected to the rotary hydraulic motor (231) through a gear oil pump; It also includes a remote control transmitter (40), a remote control receiver (41), a battery pack (42), a generator voltage regulator (43), a permanent magnet generator (44), and a generator pneumatic motor (45); The remote control transmitter (40) is wirelessly connected to the remote control receiver (41) for sending control instructions to the remote control receiver (41); the signal output end of the remote control receiver (41) is electrically connected to the drive output module via the CAN bus module; the drive output module is electrically connected to the signal input end of the multi-way reversing valve (6); The oil pipeline of the oil tank body (22) is connected to the multi-way reversing valve (6) after passing through the gear oil pump (12), and then respectively connected to the rotary hydraulic motor (231), the crawler drive motor (11), the lifting cylinder (25) and the tilting cylinder (4); The output shaft of the power pneumatic motor (13) is connected to the input shaft of the gear oil pump (12) to provide power for the gear oil pump (12); The storage battery pack (42) is respectively connected to the remote control receiver (41) and the electromagnetic coil of the multi-way reversing valve (6) to supply power to the remote control receiver (41) and the electromagnetic coil of the multi-way reversing valve (6); The permanent magnet generator (44) is connected to the battery pack (42) and is used to charge the battery pack (42) after passing through the generator voltage regulator (43); The permanent magnet generator (44) is coaxially connected to the generator pneumatic motor (45), and the generator pneumatic motor (45) is used to drive the rotor part of the permanent magnet generator (44) to rotate and cut the magnetic lines of force to generate electricity; A driver standing foot pedal (7) is arranged at the rear side of the operating platform (8).

2. The pneumatic crawler forklift according to claim 1, characterized in that: The output shaft of the power pneumatic motor (13) is key-connected to the input shaft of the gear oil pump (12).

3. The pneumatic crawler forklift according to claim 1, characterized in that: The exhaust port of the power pneumatic motor (13) is equipped with a muffler.

4. The pneumatic crawler forklift according to claim 1, characterized in that: A cast iron shield is installed at the connection point between the output shaft of the power pneumatic motor (13) and the input shaft of the gear oil pump (12).

5. The pneumatic crawler forklift according to claim 1, characterized in that: The operating platform (8) also includes a support frame, on which the multi-way reversing valve (6) is arranged, and the support frame is located at the rear of the vehicle chassis (10).

6. A remote control operation method, based on the pneumatic crawler forklift according to claim 1, characterized in that: The steps include: STEP 1: Check whether the battery pack (42) is fully charged. If so, proceed to STEP 5; if not, proceed to STEP 2; STEP 2: Open the air intake stop valve (46) of the generator air motor (45), the generator air motor (45) starts to operate, and the permanent magnet generator (44) generates electricity; STEP 3: The permanent magnet generator (44) charges the battery pack (42) via the generator voltage regulator (43); STEP 4: When the battery pack (42) is fully charged, the air intake stop valve (46) of the generator air motor (45) is closed to stop charging the battery pack (42); STEP5: Check whether the remote control transmitter (40) and the remote control receiver (41) are communicating with each other normally; if so, proceed to STEP6; if not, proceed to STEP9; STEP 6: Check the oil tank body (22) until the oil level is normal, and start the power pneumatic motor (13) to drive the gear oil pump (12) to operate; STEP7: Press the remote control transmitter (40) to check whether the multi-way reversing valve (6) is operating normally. If it is, proceed to STEP8. If not, proceed to STEP9. STEP 8: The crawler drive motor (11) performs forward, backward, front left turn, front right turn, rear left turn, and rear right turn actions according to the command; the lifting cylinder (25) and the tilting cylinder (4) respectively perform lifting and lowering, forward tilting and backward tilting actions according to the command; STEP 9: Operate the multi-way reversing valve (6), and the crawler drive motor (11) performs forward, backward, front left turn, front right turn, rear left turn, and rear right turn actions; the lifting cylinder (25) and the tilting cylinder (4) perform lifting and lowering, forward and backward tilting actions according to the instructions.

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