CN113184755B - Pneumatic crawler forklift and method - Google Patents
Pneumatic crawler forklift and method Download PDFInfo
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- CN113184755B CN113184755B CN202110657323.8A CN202110657323A CN113184755B CN 113184755 B CN113184755 B CN 113184755B CN 202110657323 A CN202110657323 A CN 202110657323A CN 113184755 B CN113184755 B CN 113184755B
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000003921 oil Substances 0.000 claims abstract description 138
- 239000012208 gear oil Substances 0.000 claims abstract description 68
- 239000003638 chemical reducing agent Substances 0.000 claims description 9
- 102000004315 Forkhead Transcription Factors Human genes 0.000 claims description 7
- 108090000852 Forkhead Transcription Factors Proteins 0.000 claims description 7
- 239000010720 hydraulic oil Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 230000005641 tunneling Effects 0.000 abstract description 7
- 230000009194 climbing Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 8
- 238000009434 installation Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/07513—Details concerning the chassis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/07572—Propulsion arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/0759—Details of operating station, e.g. seats, levers, operator platforms, cabin suspension
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/08—Masts; Guides; Chains
- B66F9/082—Masts; Guides; Chains inclinable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/12—Platforms; Forks; Other load supporting or gripping members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/20—Means for actuating or controlling masts, platforms, or forks
- B66F9/22—Hydraulic devices or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Analytical Chemistry (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention discloses a pneumatic crawler forklift and a method thereof, wherein the forklift comprises a walking crawler assembly, a forklift gantry assembly, a vehicle chassis and an operating platform; the operating platform is positioned above the front part of the vehicle chassis, the vehicle chassis is arranged on the walking track assembly, a pneumatic motor and a gear oil pump are arranged in the vehicle chassis, and an output shaft of the pneumatic motor is connected with an input shaft of the gear oil pump; the oil pipeline of the gear oil pump is respectively connected with the lifting oil cylinder and the inclined oil cylinder, and a multi-way reversing valve group is arranged on the oil pipeline of the gear oil pump; the operation panel includes support frame and multiple direction valve control pole, and multiple direction valve control pole connects multiple direction valve group. The pneumatic crawler forklift provided by the embodiment of the invention adopts the crawler travelling mechanism, has strong climbing capacity and reliable braking, and is suitable for underground tunneling tunnel severe pavement.
Description
Technical Field
The invention belongs to the field of auxiliary transportation vehicles for mines, and particularly relates to a pneumatic crawler forklift and a method.
Background
The existing modern mine coal mine auxiliary transport vehicle adopts an explosion-proof diesel rubber-tyred vehicle, has the problems of large oil consumption, environmental pollution caused by diesel combustion and exhaust, and even carbon monoxide exceeding standard safety, has large volume, and has the advantages that when equipment such as a rubber belt conveyor and the like is arranged in a roadway to run, the explosion-proof diesel vehicle can not directly transport materials to a working face after transporting the materials required by a tunneling working face and a stoping working face to the underground working roadway, and at least more than 200 meters of distance is needed to be left manually to carry supporting materials such as anchor rods, anchoring agents, pipelines, trays, anchor ropes and the like required by the working face to a working position, so that the working efficiency is low, the labor intensity is high, personnel injury is easy to generate, and the material transportation is one of key influence factors of supporting speed and tunneling footage.
The existing underground pipeline installation engineering adopts an explosion-proof diesel rubber-tyred vehicle to transport the pipeline to an installation site, aligns the pipeline by using a crow bar, connects the bolts manually, then fixes and lifts the two ends of the pipeline by using a chain block, and the chain block needs to construct a suspension anchor rod at the top of a roadway at the position of the installation pipeline before use, so that the process is complex, the labor intensity is high, the working efficiency is very low and the problem of personnel safety is related.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to solve the problems of high labor intensity, low working efficiency, influence on personnel safety and the like of equipment transportation and pipeline installation of the existing working surface materials, thereby providing the pneumatic crawler forklift with simple structure and high reliability and the method thereof.
In order to achieve the above object, the present invention is realized by the following technical scheme:
A pneumatic crawler forklift comprises a walking crawler assembly, a forklift gantry assembly, a vehicle chassis and an operating platform;
The operating platform is positioned above the front part of the vehicle chassis, the vehicle chassis is arranged on the walking track assembly, a pneumatic motor and a gear oil pump are arranged in the vehicle chassis, and an output shaft of the pneumatic motor is connected with an input shaft of the gear oil pump;
the forklift mast assembly comprises a fork head, a mast, a fork frame, a lifting oil cylinder and an inclined oil cylinder; a piston rod of the lifting oil cylinder is fixed on a lifting oil cylinder beam, two ends of the lifting oil cylinder beam are sleeved in the portal through first idler wheels, a support connecting plate is arranged at the bottom end of the portal, and a base of the lifting oil cylinder barrel is fixed on the support connecting plate; the fork head is hung on a fork frame, the fork frame is fixedly connected to a lifting cylinder cross beam through two channel steels, and the fork frame is sleeved in the portal through second idler wheels with two ends fixedly connected in the middle; the bottom end of the portal is arranged on the inner side of the front part of the walking track assembly through a pin shaft, and the middle part of the portal is arranged on the chassis of the vehicle through an inclined oil cylinder;
The oil transmission pipeline of the gear oil pump is respectively connected to the walking track assembly, the lifting oil cylinder and the inclined oil cylinder, and a multi-way reversing valve group is arranged on the oil transmission pipeline of the gear oil pump; the operation panel includes support frame and multiple direction valve control pole, and multiple direction valve control pole connects multiple direction valve group.
Further, the walking crawler assembly comprises a walking frame, a walking motor, a speed reducer, a driving wheel and a crawler; the walking motor and the speed reducer are both arranged on the walking frame, and the walking motor is connected with the driving wheel after being decelerated by the speed reducer; the bottom of the walking frame is provided with a thrust wheel, and the upper part of the walking frame is provided with a supporting chain wheel; the two ends of the walking frame are respectively provided with a left guide wheel, a right guide wheel and a left tensioning device and a right tensioning device; the caterpillar is arranged on the driving wheel;
Further, the hydraulic oil tank assembly comprises an oil tank body, an oil absorption filter and an oil return filter, wherein the oil absorption filter is arranged on the oil absorption side of the gear oil pump, the oil return filter is arranged on the oil return side of the oil tank body, and the gear oil pump is communicated with the oil tank body.
Further, the pneumatic motor comprises a first pneumatic motor and a second pneumatic motor, the gear oil pump comprises a first gear oil pump and a second gear oil pump, and the walking motor comprises a left walking motor and a right walking motor;
an output shaft of the first pneumatic motor is connected with an input shaft of the first gear oil pump, and an output shaft of the second pneumatic motor is connected with an input shaft of the second gear oil pump; the oil supply pipelines of the first gear oil pump and the second gear oil pump are connected to the pilot valve of the oil cylinder multi-way reversing valve group through the first oil pump check valve and the second oil pump check valve in a converging way respectively, and then are divided into two paths:
One path is connected with the lifting oil cylinder through a lifting reversing valve, a lifting oil cylinder one-way throttle valve, a lifting oil cylinder flow dividing and collecting valve and a lifting oil cylinder explosion-proof valve, or is connected with the tilting oil cylinder through a tilting reversing valve and a tilting oil cylinder one-way throttle valve, or respectively enters a left walking reversing valve group and a right walking reversing valve group through a walking motor flow dividing and collecting valve, and respectively enters a left walking motor and a right walking motor through the left walking reversing valve group and the right walking reversing valve group;
The other path of the hydraulic fluid respectively enters a left traveling motor and a right traveling motor speed control port through a traveling motor double-speed control valve.
Further, a muffler is installed at the exhaust port of the air motor.
Furthermore, the output shaft of the pneumatic motor is connected with the input shaft of the gear oil pump by adopting a flat key or a spline, and a cast iron shield is used as a rotation protection device at the connection position.
Further, the top end of the portal is provided with a connecting plate which is used as a limiting device of a lifting cylinder piston rod.
Further, a driver seat is arranged at the rear side of the operation desk, and a driver head top protection device is arranged on the driver seat.
Further, a counterweight is arranged at the tail part on the chassis of the vehicle.
The other technical scheme provided by the invention is as follows:
The working method of the pneumatic crawler forklift comprises the following steps:
When the forklift starts to work, an inlet valve of the pneumatic motor is opened, the first pneumatic motor and the second pneumatic motor operate to drive the first gear oil pump and the second gear oil pump to operate respectively, oil supply of the first gear oil pump and the second gear oil pump enter pilot valves of the oil cylinder multi-way reversing valve group through a first oil pump check valve and a second oil pump check valve in a converging mode respectively, and then the two paths of the oil cylinders are divided into two paths:
One path passes through a lifting reversing valve, a lifting oil cylinder one-way throttle valve, a lifting oil cylinder flow distribution and collection valve and a lifting oil cylinder explosion-proof valve to drive a lifting oil cylinder so as to lift a fork truck portal; or the tilting reversing valve and the tilting cylinder one-way throttle valve drive the tilting cylinder to tilt the forklift mast; or the flow distribution and collection valve of the traveling motor respectively enters the left traveling reversing valve group and the right traveling reversing valve group, and the left traveling reversing valve group and the right traveling reversing valve group respectively enter the left traveling motor and the right traveling motor to drive the left traveling motor and the right traveling motor to realize traveling;
the other path of the motion signals respectively enter a left traveling motor and a right traveling motor speed control port through a traveling motor double-speed control valve, so that the high-speed motion and low-speed motion conversion of the traveling motor is realized.
Compared with the prior art, the technical scheme of the invention has the following advantages:
1) The pneumatic crawler forklift provided by the embodiment of the invention adopts the crawler travelling mechanism, has strong climbing capacity and reliable braking, and is suitable for underground tunneling tunnel severe pavement.
2) The pneumatic crawler forklift provided by the embodiment of the invention adopts the forklift portal, has the auxiliary transportation function of materials and equipment, has the loading and unloading function of the materials and the equipment, realizes orderly stacking of the materials and the equipment, improves the safety quality standardization level of underground tunneling operation, greatly improves the working efficiency of underground personnel, reduces the labor intensity and ensures the personal safety.
3) The pneumatic crawler forklift provided by the embodiment of the invention has the advantages that the lifting oil cylinder adopts the secondary or tertiary oil cylinder, the lifting oil cylinder is internally arranged in the portal frame to slide and lift, the effective lifting height is higher, the lifting capacity of the forklift is improved, the simple and reliable design efficiency is higher, and the pneumatic crawler forklift is suitable for underground humid and dust environments.
4) According to the pneumatic crawler forklift provided by the embodiment of the invention, two pneumatic motors are used for respectively driving two gear oil pumps, the confluence driving meets the liquid supply requirements of a lifting oil cylinder, an inclined oil cylinder and a traveling motor of the forklift, and meanwhile, when one gear oil pump or one motor fails, the traveling and safe operation of the forklift are ensured;
5) The pneumatic crawler forklift provided by the embodiment of the invention can be used for increasing the displacement of the walking motor under the heavy load condition, switching to low-speed operation, reducing the displacement of the walking motor under the light load condition and switching to high-speed operation.
6) The left and right traveling motors of the pneumatic crawler forklift provided by the embodiment of the invention are respectively provided with the left traveling reversing valve and the right traveling reversing valve, and can be operated respectively or simultaneously, so that the steering and advancing of a forklift system are realized.
7) According to the pneumatic crawler forklift provided by the embodiment of the invention, the two lifting cylinders are operated by adopting the same lifting reversing valve, so that the synchronous action of the two lifting cylinders is realized; the two inclined oil cylinders are operated by adopting the same inclined reversing valve, so that synchronous action of the two inclined oil cylinders is realized.
8) The pneumatic crawler forklift provided by the embodiment of the invention has no equipment such as a starting contactor, an explosion-proof motor, an explosion-proof diesel engine, a storage battery, a methane-electricity locking device, a wind power locking device and the like of a conventional forklift, adopts a pneumatic motor and a gear oil pump as power, and has high reliability and safety and simple and light structure.
9) The pneumatic crawler forklift provided by the embodiment of the invention adopts compressed air as a power source, is environment-friendly, energy-saving and reliable in explosion prevention, and the underground tunneling tunnel and the transportation tunnel upper part compressed air pipeline extend along with the tunneling development engineering, so that the compressed air is more convenient to take.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
Fig. 1 is a schematic structural diagram of a pneumatic crawler forklift provided by an embodiment of the invention.
Fig. 2 is a schematic diagram of a chassis of a pneumatic crawler forklift according to an embodiment of the present invention.
Fig. 3 is a schematic view of a forklift mast assembly of a pneumatic crawler forklift according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a hydraulic system of a pneumatic crawler forklift according to an embodiment of the present invention.
In the accompanying drawings: 1 fork head; 3, a door frame; 4, tilting the oil cylinder; 5, an operation table; 6, a driver seat; 7, a driver head top protection device; 8, a hydraulic oil tank assembly; 9, balancing weight; 10 a vehicle chassis; 11 driving wheels; 12 thrust wheels; 13 supporting chain wheels; 14 caterpillar tracks; 15 pin shafts; 17 gear oil pump; 18 rotating the guard; 19 a pneumatic motor; 22 lifting oil cylinder explosion-proof valve; 23, a flow dividing and collecting valve of the lifting oil cylinder; 24 lifting oil cylinder one-way throttle valve; 26 tilting the one-way throttle valve of the oil cylinder; 27 pilot valve; 28 lifting reversing valves; 29 tilting the reversing valve; a first pneumatic motor 30; 31 a first gear oil pump oil suction filter; a second pneumatic motor 32; 33 a second gear oil pump oil suction filter; 34 a first gear oil pump; a second gear oil pump 35; 36 double speed control valve of walking motor; 37 walking motor; 38 left walking reversing valve; 39 right walk reversing valve group; 40, a flow dividing and collecting valve is arranged through a traveling motor; 41a first oil pump check valve; 42a second oil pump check valve; 51 multiple directional control valve control levers; 52 supporting frames; 61 a pilot relief valve; 62 oil cylinder overflow valve; 320 lifting the cylinder cross beam; 330 a first roller; 340 lifting the oil cylinder; 350 channel steel; 360 fork frames; 370 second roller.
Detailed Description
The application will be described in detail below with reference to the drawings in connection with embodiments. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.
The following detailed description is exemplary and is intended to provide further details of the application. Unless defined otherwise, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the application.
As shown in fig. 1 and 2, a pneumatic crawler forklift comprises a walking crawler assembly, a forklift mast assembly, a vehicle chassis 10 and an operation table 5; the operation panel 5 is located above the front portion of the vehicle chassis 10, a driver seat 6 is provided on the rear side of the operation panel 5, a driver head top protection device 7 is provided on the driver seat 6, and a counterweight 9 is provided on the rear portion of the vehicle chassis 10. The vehicle chassis 10 is arranged on a walking track assembly, a pneumatic motor 19 and a gear oil pump 17 are arranged in the vehicle chassis 10, an output shaft of the pneumatic motor 19 is connected with an input shaft of the gear oil pump 17 by adopting a flat key or a spline, a cast iron shield is used as a rotation protection device 18 at the connection position, and a muffler is arranged at an exhaust port of the pneumatic motor 19. The walking crawler assembly comprises a walking frame, a walking motor 37, a speed reducer, a driving wheel 11 and a crawler 14; the walking motor 37 and the speed reducer are both arranged on the walking frame, and the walking motor 37 is connected with the driving wheel 11 after being decelerated by the speed reducer; the bottom of the walking frame is provided with a thrust wheel 12, and the upper part is provided with a support chain wheel 13; the two ends of the walking frame are respectively provided with a left guide wheel, a right guide wheel and a left tensioning device and a right tensioning device; the crawler belt 14 is mounted on the driving wheel 11.
As shown in fig. 3, the forklift mast assembly comprises a fork head 1, a mast 3, a fork 360, a lifting cylinder 340 and a tilting cylinder 4; a piston rod of the lifting oil cylinder 340 is fixed on the lifting oil cylinder beam 320, two ends of the lifting oil cylinder beam 320 are sleeved in the door frame 3 through the first roller 330, and slide up and down along the door frame 3 in the telescopic operation process of the lifting oil cylinder 340; the fork head 1 is hung on the fork frame 360, the fork frame 360 is fixedly connected to the lifting cylinder cross beam 320 through two channel steels 350, and the fork frame 360 is sleeved in the portal 3 through second idler wheels 370 fixedly connected with two ends of the middle part and can slide up and down along the portal 3; the bottom end of the portal frame 3 is arranged on the inner side of the front part of the walking track assembly through a pin shaft 15, and the middle part of the portal frame 3 is arranged on the vehicle chassis 10 through an inclined oil cylinder 4; the top end of the portal frame 3 is provided with a connecting plate 310, and the connecting plate 310 is used as a limiting device of a lifting cylinder piston rod; the bottom end of the portal frame 3 is provided with a support connection plate 380, the connection plate 310 is simultaneously used as a limiting device of a lifting cylinder piston rod, and a cylinder barrel base of the lifting cylinder 340 is fixed on the support connection plate 380. In the preferred embodiment of the present invention, the height of the cylinder tube of the lift cylinder 340 is about one half of the height of the gantry 3; or the lifting cylinder 340 adopts a three-stage cylinder, and the height of the cylinder barrel of the lifting cylinder is about one third of the height of the portal frame 3.
As shown in fig. 4, the oil delivery pipeline of the gear oil pump 17 is respectively connected with the lifting oil cylinder 340 and the tilting oil cylinder 4, and the oil delivery pipeline of the gear oil pump 17 is provided with a multi-way reversing valve group; the operation panel 5 includes a support frame 52 and a multiple directional control valve lever 51, and the multiple directional control valve lever 51 is connected to the multiple directional control valve group.
The multi-way reversing valve group comprises a lifting oil cylinder one-way throttle valve 24, an inclined oil cylinder one-way throttle valve 26, a pilot valve 27, a pilot overflow valve 61, a lifting reversing valve 28, an inclined reversing valve 29 and an oil cylinder overflow valve 62, wherein the pilot overflow valve 61 and the oil cylinder overflow valve 62 play a role in safety overflow. Wherein the lifting oil cylinder one-way throttle valve 24 and the tilting oil cylinder one-way throttle valve 26 are three-position six-way O-shaped valves; the left traveling reversing valve bank 38 comprises a left traveling reversing valve and a bridge oil path, wherein the left traveling reversing valve is a three-position six-way Y-shaped valve; the right traveling reversing valve group 39 comprises a right traveling reversing valve and a bridge oil path, wherein the right traveling reversing valve is a three-position six-way Y-shaped valve.
The hydraulic oil tank assembly 8 comprises an oil tank body, an oil suction filter and an oil return filter which are arranged on the oil tank body, and the gear oil pump 17 is communicated with the oil tank body. The air motor 19 includes a first air motor 30 and a second air motor 32, the gear oil pump 17 includes a first gear oil pump 34 and a second gear oil pump 35, the first gear oil pump 34 is mounted with a first gear oil pump oil suction filter 31, and the second gear oil pump 35 is mounted with a second gear oil pump oil suction filter 33; the travel motor 37 includes a left travel motor and a right travel motor; an output shaft of the first air motor 30 is connected with an input shaft of the first gear oil pump 34, and an output shaft of the second air motor 32 is connected with an input shaft of the second gear oil pump 35; the oil supply of the first gear oil pump 34 and the second gear oil pump 35 respectively flow into the pilot valve 27 of the oil cylinder multi-way reversing valve group through the first oil pump check valve 41 and the second oil pump check valve 42, and then are divided into two paths: one path is connected with a lifting oil cylinder 340 through a lifting reversing valve 28, a lifting oil cylinder one-way throttle valve 24, a lifting oil cylinder flow dividing and collecting valve 23 and a lifting oil cylinder explosion-proof valve 22, or is connected with an inclined oil cylinder 4 through an inclined reversing valve 29 and an inclined oil cylinder one-way throttle valve 26, or respectively enters a left walking reversing valve group 38 and a right walking reversing valve group 39 through a walking motor flow dividing and collecting valve 40, and respectively enters a left walking motor and a right walking motor through the left walking reversing valve group 38 and the right walking reversing valve group 39; the other path enters the left travel motor and right travel motor speed control ports via travel motor two speed control valve 36, respectively.
The embodiment of the invention also provides a working method of the pneumatic crawler forklift, which comprises the following steps:
When the forklift starts to work, the inlet valve of the pneumatic motor is opened, the first pneumatic motor 30 and the second pneumatic motor 32 are operated to respectively drive the first gear oil pump 34 and the second gear oil pump 35 to operate, oil supply of the first gear oil pump 34 and the second gear oil pump 35 respectively flow into the pilot valve 27 of the oil cylinder multi-way reversing valve group through the first oil pump check valve 41 and the second oil pump check valve 42, and then the two paths are divided: one path drives the lifting cylinder 340 through the lifting reversing valve 28, the lifting cylinder one-way throttle valve 24, the lifting cylinder flow distributing and collecting valve 23 and the lifting cylinder explosion-proof valve 22 so as to lift the forklift mast; or the tilting cylinder 4 is driven by the tilting reversing valve 29 and the tilting cylinder one-way throttle valve 26 so as to tilt the forklift mast; or respectively enter the left traveling reversing valve group 38 and the right traveling reversing valve group 39 through the traveling motor flow dividing and collecting valve 40, respectively enter the left traveling motor and the right traveling motor through the left traveling reversing valve group 38 and the right traveling reversing valve group 39, and drive the left traveling motor and the right traveling motor to realize traveling;
The other path of the motion signals respectively enter the left traveling motor and the right traveling motor through the traveling motor double-speed control valve 36 to realize the high-low speed motion conversion of the traveling motor 37.
It will be appreciated by those skilled in the art that the present invention can be carried out in other embodiments without departing from the spirit or essential characteristics thereof. Accordingly, the above disclosed embodiments are illustrative in all respects, and not exclusive. All changes that come within the scope of the invention or equivalents thereto are intended to be embraced therein.
Claims (6)
1. The pneumatic crawler forklift is characterized by comprising a walking crawler assembly, a forklift gantry assembly, a vehicle chassis (10) and an operating platform (5);
The operating platform (5) is positioned on the vehicle chassis (10), the vehicle chassis (10) is arranged on the walking track assembly, a pneumatic motor (19) and a gear oil pump (17) are arranged in the vehicle chassis (10), and an output shaft of the pneumatic motor (19) is connected with an input shaft of the gear oil pump (17);
The forklift mast assembly comprises a fork head (1), a mast (3), a fork frame (360), a lifting oil cylinder (340) and an inclined oil cylinder (4); a piston rod of a lifting oil cylinder (340) is fixed on a lifting oil cylinder beam (320), and two ends of the lifting oil cylinder beam (320) are sleeved in the portal (3) through first rollers (330); the fork head (1) is hung on the fork frame (360), the fork frame (360) is fixedly connected to the lifting cylinder cross beam (320) through two channel steels (350), the fork frame (360) is sleeved in the portal (3) through second rollers (370) fixedly connected to the two ends of the middle part, a support connecting plate (380) is arranged at the bottom end of the portal (3), and a cylinder barrel base of the lifting cylinder (340) is fixed on the support connecting plate (380); the bottom end of the portal frame (3) is arranged at the front part of the travelling crawler assembly through a pin shaft (15), and the middle part of the portal frame (3) is arranged on the vehicle chassis (10) through an inclined oil cylinder (4);
The oil conveying pipeline of the gear oil pump (17) is respectively connected to the walking track assembly, the lifting oil cylinder (340) and the inclined oil cylinder (4), and a multi-way reversing valve group is arranged on the oil conveying pipeline of the gear oil pump (17); the operation table (5) comprises a supporting frame (52) and a multi-way reversing valve control rod (51), and the multi-way reversing valve control rod (51) is connected with the multi-way reversing valve group;
the walking crawler belt assembly comprises a walking frame, a walking motor (37), a speed reducer, a driving wheel (11) and a crawler belt (14); the walking motor (37) and the speed reducer are both arranged on the walking frame, the walking motor (37) is connected with the driving wheel (11) after being decelerated by the speed reducer, and the crawler belt (14) is arranged on the driving wheel (11);
The hydraulic oil tank assembly (8) comprises an oil tank body, an oil suction filter and an oil return filter, wherein the oil suction filter is arranged on the oil suction side of the gear oil pump (17), the oil return filter is arranged on the oil return side of the oil tank body, and the gear oil pump (17) is communicated with the oil tank body;
The pneumatic motor (19) comprises a first pneumatic motor (30) and a second pneumatic motor (32), the gear oil pump (17) comprises a first gear oil pump (34) and a second gear oil pump (35), and the walking motor (37) comprises a left walking motor and a right walking motor;
An output shaft of the first pneumatic motor (30) is connected with an input shaft of the first gear oil pump (34), and an output shaft of the second pneumatic motor (32) is connected with an input shaft of the second gear oil pump (35); the oil supply pipelines of the first gear oil pump (34) and the second gear oil pump (35) are respectively connected to the pilot valve (27) of the oil cylinder multi-way reversing valve group through a first oil pump check valve (41) and a second oil pump check valve (42) in a converging way, and then are divided into two paths:
One path is connected with a lifting oil cylinder (340) through a lifting reversing valve (28), a lifting oil cylinder one-way throttle valve (24), a lifting oil cylinder flow dividing and collecting valve (23) and a lifting oil cylinder explosion-proof valve (22), or is connected with a tilting oil cylinder (4) through a tilting reversing valve (29) and a tilting oil cylinder one-way throttle valve (26), or is respectively connected with a left walking reversing valve group (38) and a right walking reversing valve group (39) through a walking motor flow dividing and collecting valve (40), and is respectively connected with a left walking motor and a right walking motor through the left walking reversing valve group (38) and the right walking reversing valve group (39);
The other path of the hydraulic oil enters a left traveling motor and a right traveling motor speed control port respectively through a traveling motor double-speed control valve (36);
a muffler is mounted at the exhaust port of the air motor (19).
2. Pneumatic crawler fork truck according to claim 1, characterized in that the output shaft of the pneumatic motor (19) is coupled to the input shaft of the gear oil pump (17) by means of flat keys or splines.
3. Pneumatic crawler fork truck according to claim 1, characterized in that the top of the mast (3) is provided with a connection plate (310).
4. Pneumatic crawler fork truck according to claim 1, characterized in that the rear side of the operating table (5) is provided with a driver seat (6).
5. Pneumatic tracked forklift according to claim 1, characterized in that the rear part above the vehicle chassis (10) is provided with a counterweight (9).
6. A method of operating a pneumatic tracked forklift as claimed in claim 1, comprising:
When the forklift starts to work, an inlet valve of the pneumatic motor is opened, the first pneumatic motor (30) and the second pneumatic motor (32) are operated to drive the first gear oil pump (34) and the second gear oil pump (35) to operate respectively, oil supply of the first gear oil pump (34) and the second gear oil pump (35) is converged into a pilot valve (27) of the oil cylinder multi-way reversing valve group through a first oil pump check valve (41) and a second oil pump check valve (42) respectively, and then the two paths of the oil supply are divided into two paths:
One path drives a lifting oil cylinder (340) through a lifting reversing valve (28), a lifting oil cylinder one-way throttle valve (24), a lifting oil cylinder flow distributing and collecting valve (23) and a lifting oil cylinder explosion-proof valve (22) so as to lift a fork truck portal; or the tilting reversing valve (29) and the tilting cylinder one-way throttle valve (26) drive the tilting cylinder (4) so as to realize tilting of the forklift mast; or the water enters a left traveling reversing valve group (38) and a right traveling reversing valve group (39) respectively through a traveling motor flow dividing and collecting valve (40), and enters a left traveling motor and a right traveling motor respectively through the left traveling reversing valve group (38) and the right traveling reversing valve group (39), so that the left traveling motor and the right traveling motor are driven to realize traveling;
The other path of the motion signals respectively enter a left traveling motor and a right traveling motor speed control port through a traveling motor double-speed control valve (36) to realize high-low speed motion conversion of the traveling motor (37).
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| CN202110657323.8A CN113184755B (en) | 2021-06-11 | 2021-06-11 | Pneumatic crawler forklift and method |
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| CN202110657323.8A CN113184755B (en) | 2021-06-11 | 2021-06-11 | Pneumatic crawler forklift and method |
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| CN113184755A CN113184755A (en) | 2021-07-30 |
| CN113184755B true CN113184755B (en) | 2024-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110657323.8A Active CN113184755B (en) | 2021-06-11 | 2021-06-11 | Pneumatic crawler forklift and method |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115681232B (en) * | 2022-11-04 | 2023-09-01 | 阿特拉斯叉车(杭州)有限公司 | Hydraulic system and four-way forklift with same |
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| CN215756196U (en) * | 2021-06-11 | 2022-02-08 | 陕西秦之基智能科技有限公司 | Pneumatic crawler-type forklift |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI20041280A (en) * | 2004-10-01 | 2006-04-02 | Rocla Oyj | Method and apparatus for laterally displacing a fork carriage of a forklift |
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- 2021-06-11 CN CN202110657323.8A patent/CN113184755B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1183904A (en) * | 1967-09-20 | 1970-03-11 | Electromec Design And Dev Comp | Side-Loading Means for Fork-Lift Trucks |
| CN2511663Y (en) * | 2001-08-14 | 2002-09-18 | 同济大学 | Hydraulic electric fork lift |
| CN2892815Y (en) * | 2006-04-19 | 2007-04-25 | 浙江佳力科技股份有限公司 | Whole hydraulic electric fork truck hydraulic system |
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| WO2021022946A1 (en) * | 2019-08-08 | 2021-02-11 | 桂林市富华金属制品有限公司 | Loading robot and control system thereof |
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| CN215756196U (en) * | 2021-06-11 | 2022-02-08 | 陕西秦之基智能科技有限公司 | Pneumatic crawler-type forklift |
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| Publication number | Publication date |
|---|---|
| CN113184755A (en) | 2021-07-30 |
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