CN113682981B - Flexible arm of platform fire engine ascends a height - Google Patents
Flexible arm of platform fire engine ascends a height Download PDFInfo
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- CN113682981B CN113682981B CN202111052786.8A CN202111052786A CN113682981B CN 113682981 B CN113682981 B CN 113682981B CN 202111052786 A CN202111052786 A CN 202111052786A CN 113682981 B CN113682981 B CN 113682981B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/68—Jibs foldable or otherwise adjustable in configuration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
- B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
- B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
- B66C23/705—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by hydraulic jacks
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- Forklifts And Lifting Vehicles (AREA)
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Abstract
The embodiment of the invention discloses a telescopic arm of a fire truck with an ascending platform, belonging to the technical field of fire-fighting and rescue equipment, and comprising a plurality of stages of telescopic cylinders which are sequentially sleeved together, wherein each stage of telescopic cylinder comprises a plurality of telescopic joints which are sleeved together, each stage of telescopic cylinder is connected with a steel wire rope hydraulic lifting device, the steel wire rope hydraulic lifting device of the first stage of telescopic cylinder is arranged in the outermost telescopic joint, and the steel wire rope hydraulic lifting device of the next stage of telescopic cylinder is arranged in the innermost telescopic joint of the previous stage of telescopic cylinder; the outermost telescopic joint of the next-stage telescopic cylinder is sleeved in the innermost telescopic joint of the previous-stage telescopic cylinder, and an oil pipe conveying device for supplying oil to the next-stage telescopic cylinder is installed in the innermost telescopic joint of the previous-stage telescopic cylinder. The invention solves the technical problems that the lifting height of the traditional telescopic arm is greatly limited by the transmission form of the hydraulic oil cylinder and the hydraulic oil power cannot be continuously conveyed along with the lifting of the telescopic arm, and is widely applied to high-altitude fire fighting or rescue.
Description
Technical Field
The embodiment of the invention relates to the technical field of fire fighting and rescue equipment, in particular to a telescopic arm of a fire fighting truck with an ascending platform.
Background
Along with the increase of high-rise buildings, frequent high-altitude fire-fighting accidents are more and more noticed by the public in recent years. At present, telescopic arms used on a climbing platform fire truck usually have two forms, one is a crank arm structure, the other is a telescopic cylinder structure, the number of sections of the crank arm structure is small, the number of sections of the telescopic cylinder structure is large, the telescopic arms in the two forms are realized by the extension and contraction of a hydraulic oil cylinder when lifting, the lifting height depends on the stroke of the hydraulic oil cylinder, the stroke of the hydraulic oil cylinder is limited, and the rescue height of the telescopic arms cannot meet the building height of the current high-rise building only by the single transmission of the hydraulic oil cylinder stroke extension and contraction; moreover, a hydraulic transmission element cannot be arranged at the top of the telescopic arm, and hydraulic oil power cannot be continuously conveyed along with the lifting of the telescopic arm at present, which is a technical problem which always puzzles technicians in the field.
Therefore, in the technical field of fire fighting and rescue equipment, the need for research and improvement of the telescopic boom of the elevating platform fire truck still exists, which is a research hotspot and focus in the technical field of fire fighting and rescue equipment at present and is a starting point of the completion of the invention.
Disclosure of Invention
Therefore, the embodiment of the invention provides a telescopic arm of a fire truck with an ascending platform, which aims to solve the technical problems that the lifting height of the conventional telescopic arm is greatly limited by the transmission form of a hydraulic oil cylinder and hydraulic oil power cannot be continuously conveyed along with the lifting of the telescopic arm.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
according to the embodiment of the invention, the telescopic arm of the elevating platform fire truck comprises a plurality of stages of telescopic cylinders which are sequentially sleeved together, each stage of telescopic cylinder comprises a plurality of telescopic joints which are sleeved together, each stage of telescopic cylinder is connected with a steel wire rope hydraulic lifting device, the steel wire rope hydraulic lifting device of the first stage of telescopic cylinder is arranged in the outermost telescopic joint, the steel wire rope hydraulic lifting device of the next stage of telescopic cylinder is arranged in the innermost telescopic joint of the previous stage of telescopic cylinder, the steel wire rope hydraulic lifting device comprises a hydraulic oil cylinder, the cylinder body of the hydraulic oil cylinder is fixedly arranged at the bottom of the corresponding telescopic joint, a fixed pulley block is arranged on the cylinder body of the hydraulic oil cylinder, a movable pulley block is arranged on the piston rod of the hydraulic oil cylinder, a steel wire rope is arranged between the hydraulic oil cylinder and the corresponding telescopic joint, one end of the steel wire rope is fixed, and the other end of the steel wire rope is fixed on the innermost telescopic joint of the stage of the telescopic cylinder after passing through the movable pulley block and the fixed pulley block; the outermost telescopic joint of the next-stage telescopic cylinder is sleeved in the innermost telescopic joint of the previous-stage telescopic cylinder, and an oil pipe conveying device for supplying oil to the next-stage telescopic cylinder is installed in the innermost telescopic joint of the previous-stage telescopic cylinder.
Furthermore, the bottom of the outmost telescopic joint of the first-stage telescopic cylinder and the bottom of the innermost telescopic joint of the previous-stage telescopic cylinder are respectively provided with a rope distributing wheel used for distributing the steel wire ropes of the corresponding fixed pulley blocks to corresponding positions.
Furthermore, the bottom of other telescopic joints except the outmost telescopic joint of the first-stage telescopic cylinder is provided with a wall-penetrating wheel, the bottom of the inner side of the outmost telescopic joint of the first-stage telescopic cylinder and the bottom of the innermost telescopic joint of the previous-stage telescopic cylinder are provided with bottom steering wheels, and the top of the inner side of other telescopic joints except the innermost telescopic joint of the last-stage telescopic cylinder is provided with top steering wheels.
Furthermore, the wall penetrating wheel penetrates through the corresponding telescopic joint, and the steel wire rope is wound around the wall penetrating wheel by at least two turns from the outside of the corresponding telescopic joint and then enters the inner side of the telescopic joint.
Furthermore, the steel wire rope of each stage of telescopic cylinder is wound through the corresponding movable pulley block and the corresponding fixed pulley block, then sequentially wound through the corresponding rope distribution wheel, the bottom steering wheel, the top steering wheel on the outermost layer and the wall penetrating wheel on the telescopic joint on the adjacent layer, and finally fixed at the position above the wall penetrating wheel on the telescopic joint on the innermost layer.
Further, oil pipe conveyor includes the installing support, rotate on the installing support and install the core section of thick bamboo by power unit drive, be equipped with the baffle in the core section of thick bamboo, the baffle separates the core section of thick bamboo inner chamber for advance oil chamber and return oil chamber, fixed mounting has the intercommunication on the core section of thick bamboo advance oil pipe in oil chamber, fixed mounting has the intercommunication on the core section of thick bamboo return oil pipe in oil chamber, advance oil chamber and pass through rotary joint and connect into oil pipe way, return oil chamber and connect back oil pipe way through another rotary joint, core section of thick bamboo surface fixed mounting has the ventral disc, fixed mounting has the double flute rim plate on the ventral disc, core section of thick bamboo, ventral disc and the coaxial setting of double flute rim plate, it has into oil rubber pipe and return oil rubber pipe to coil respectively in the double flute rim plate, oil rubber pipe one end is connected advance oil pipe, return oil rubber pipe's one end is connected return oil pipe.
Furthermore, a guide wheel is rotatably mounted on the mounting bracket, a floating wheel is arranged below the guide wheel, and the oil inlet rubber tube and the oil return rubber tube are connected with a hydraulic oil cylinder of the rear-stage telescopic cylinder after passing through the guide wheel and the floating wheel in a winding manner.
Furthermore, a first sensor and a second sensor are arranged on the mounting bracket, the first sensor is positioned below the guide wheel and above the floating wheel, the second sensor is positioned below the floating wheel, and the first sensor and the second sensor are both connected with the power mechanism.
Furthermore, an extension spring is arranged between the floating wheel and the mounting bracket, one end of the extension spring is fixed on the floating wheel, and the other end of the extension spring is fixed on the mounting bracket.
Furthermore, the power mechanism comprises a motor installed on the installation support, an outer gear ring is fixedly installed on the web plate, a transmission shaft is rotatably installed on the installation support, a driving gear meshed with the outer gear ring is installed at one end of the transmission shaft, and the other end of the transmission shaft is in transmission connection with the motor.
The embodiment of the invention has the following advantages:
(1) The invention uses one hydraulic cylinder to lift a plurality of telescopic joints, thereby not only reducing the use amount of the hydraulic cylinder and reducing the production cost, but also saving the installation space, and compared with the traditional method that each telescopic joint needs one hydraulic cylinder, more telescopic joints can be arranged, the telescopic length is increased, the technical problem that the lifting height of the telescopic arm of the traditional telescopic cylinder structure is greatly limited by the transmission form of the hydraulic cylinder is solved, the sectional area of the telescopic joint can be as large as possible, and the stability of the telescopic joint in the telescopic process is increased; and because the oil pipe conveying device is arranged, the extension and retraction of the telescopic joint are met, and the continuous conveying of the hydraulic oil power along with the lifting of the telescopic arm is realized.
(2) Because the bottom of the telescopic joint is provided with the wall penetrating wheel, the steel wire rope is wound on the wall penetrating wheel from the outer side of the corresponding telescopic joint for at least two turns and then enters the inner side of the telescopic joint, so that bottom force application is formed when the steel wire rope is hoisted and stretched, the stress of each section of the raised telescopic joint is balanced, the raising and lowering of the telescopic joint are more stable, the groove width of the wall penetrating wheel is only the diameter of three turns of the steel wire rope, the wheel width direction is consistent with the thickness direction of a steel plate of the telescopic joint, the internal space of the telescopic joint is saved to the maximum extent, and the utilization rate of the effective sectional area of the telescopic joint is improved.
(3) Due to the floating wheel, the oil inlet rubber tube and the oil return rubber tube are stably released or coiled, and the lifting of the telescopic arm cannot be influenced due to the fact that the linear speeds of the oil inlet rubber tube and the oil return rubber tube on the double-groove wheel disc are not constant.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary and that other implementation drawings may be derived from the provided drawings by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic diagram of a wire rope winding structure of the first stage telescopic cylinder in the embodiment of the invention;
FIG. 3 is a schematic view of the outermost telescoping section of FIG. 2;
FIG. 4 isbase:Sub>A schematic cross-sectional view of A-A in FIG. 3;
FIG. 5 is a schematic cross-sectional view of B-B in FIG. 3;
FIG. 6 is a schematic diagram of a wire rope winding relationship between two adjacent telescopic joints according to an embodiment of the present invention;
FIG. 7 is a schematic structural view of a tubing transfer assembly according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of the structure of E-E in FIG. 7;
in the figure: 100. the hydraulic lifting device comprises a first-stage telescopic cylinder, 200, a second-stage telescopic cylinder, 300, a last-stage telescopic cylinder, 400, a steel wire rope hydraulic lifting device, 401, an outermost-layer telescopic joint, 402, a secondary outer-layer telescopic joint, 403, an innermost-layer telescopic joint, 404, a steel wire rope, 405, a rope distributing wheel, 406, a bottom steering wheel, 407, a top steering wheel, 408, a wall penetrating wheel, 409, a hydraulic oil cylinder, 410, a movable pulley block, 411, a fixed pulley block, 500, an oil pipe conveying device, 501, a mounting bracket, 502, a double-groove wheel disc, 503, a guide wheel, 504, a floating wheel, 505, a first sensor, 506, a second sensor, 507, an extension spring, 508, a core cylinder, 5081, an oil inlet cavity, 5082, an oil return cavity, 509, a partition board, 510, an oil inlet pipe, 511, an oil return pipe, 512, a belly disc, an oil inlet rubber pipe, 514, an oil return rubber pipe, a motor, an oil return rubber pipe, 515, a motor, 516, a transmission shaft, 517, an outer gear ring, 518 and a driving gear.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the present specification, the terms "front", "rear", "left", "right", "middle", "upper" and "lower" are used for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship between the terms and the terms are also regarded as the scope of the present invention without substantial changes in the technical contents.
As shown in fig. 1, an embodiment of the present invention provides a telescopic arm of a fire fighting truck for a climbing platform, including a plurality of telescopic cylinders sleeved together in sequence, each telescopic cylinder includes a plurality of telescopic joints sleeved together, each telescopic cylinder is connected to a steel wire rope hydraulic lifting device 400, the steel wire rope hydraulic lifting device 400 of the first telescopic cylinder 100 is disposed in an outermost telescopic joint 401, the steel wire rope hydraulic lifting device 400 of the next telescopic cylinder is disposed in an innermost telescopic joint 403 of the previous telescopic cylinder, as shown in fig. 2, 3, 4 and 5, the steel wire rope hydraulic lifting device 400 includes a hydraulic cylinder 409, a cylinder body of the hydraulic cylinder 409 is fixedly disposed at the bottom of an internal space of a corresponding telescopic joint, a fixed pulley block 411 is disposed on the cylinder body of the hydraulic cylinder 409, a movable pulley block 410 is disposed on a piston rod of the hydraulic cylinder 409, a steel wire rope 404 is disposed between the hydraulic cylinder 409 and the corresponding telescopic joint, one end of the steel wire rope 404 is fixed, the fixed end is generally a fixed position of the cylinder body of the outermost telescopic joint 409 or the telescopic joint 401 of the hydraulic cylinder 409, and the other end is fixed position of the movable pulley block 410 and fixed pulley block is fixed pulley block 411 and then fixed to the innermost telescopic joint 403 of the telescopic cylinder. The number of movable pulleys in the movable pulley block 410 and the number of fixed pulleys in the fixed pulley block 411 are set by a person skilled in the art according to the number of telescopic joints, so that the stroke of a hydraulic cylinder 409 fixed in an outermost telescopic joint 401 meets the requirement of the telescopic joints, that is, the hydraulic cylinder 409 with the length of one telescopic joint can meet the requirement of the telescopic joints, for example, the telescopic joints have six sections, three movable pulleys are arranged in the movable pulley block 410, three fixed pulleys are arranged in the fixed pulley block 411, one end of a steel wire rope 404 is fixed at the fixed position of a cylinder body of the hydraulic cylinder 409, the other end of the steel wire rope sequentially and respectively winds around the movable pulleys and the fixed pulleys and then is fixed on the telescopic joint 403 of the innermost telescopic joint, the transmission ratio of the three-stage movable pulley structure is 1: 6, namely, a piston rod of the hydraulic cylinder 409 is telescopic 1 meter telescopic, the telescopic joint moves 6 meters, the hydraulic cylinder 409 with the stroke of 8 meters can meet the telescopic joints with the telescopic length of 48 meters, three-stage telescopic cylinders are connected in series, the telescopic arm with the telescopic length of 48 meters, the rescue height of 144 meters can be reached, and the far beyond the current highest rescue height of 112 meters, and the rescue technology is further solved. The outermost telescopic joint 401 of the next-stage telescopic cylinder is sleeved in the innermost telescopic joint 403 of the previous-stage telescopic cylinder, and the innermost telescopic joint 403 of the previous-stage telescopic cylinder is internally provided with an oil pipe conveying device 500 for supplying oil to the next-stage telescopic cylinder.
The bottom of the outermost telescopic joint 401 of the first-stage telescopic cylinder 100 and the bottom of the innermost telescopic joint 403 of the previous-stage telescopic cylinder are both provided with rope distributing wheels 405 for distributing the steel wire ropes 404 of the corresponding fixed pulley blocks 411 to corresponding positions, taking a telescopic arm with a square cross section as an example, hoisting points are generally required to be installed in four directions, then the rope distributing wheels 405 need four-groove structures, four steel wire ropes 404 need to be distributed to four different side walls respectively, and the synchronism and balance in the lifting process of each telescopic joint are guaranteed.
As shown in fig. 6, wall-penetrating wheels 408 are installed at the bottoms of other telescopic joints except for the outermost telescopic joint 401 of the first-stage telescopic cylinder 100, the wall-penetrating wheels 408 are rotatably installed on the corresponding telescopic joints through bearing seats, through holes are formed in the telescopic joints corresponding to the positions of the wall-penetrating wheels 408 to allow the wall-penetrating wheels 408 to penetrate through, the groove width of each wall-penetrating wheel 408 is only the diameter of three turns of a steel wire rope, the wheel width direction is consistent with the thickness direction of a telescopic joint steel plate, the internal space of the telescopic joints is saved to the maximum extent, the utilization rate of the effective sectional area of the telescopic joints is improved, bottom steering wheels 406 are installed at the bottoms of the inner sides of the outermost telescopic joint 401 of the first-stage telescopic cylinder 100 and the innermost telescopic joint of the previous-stage telescopic cylinder, top steering wheels 403 are installed at the tops of the inner sides of other telescopic joints except for the innermost telescopic joint 403 of the telescopic cylinder 300, the wall-penetrating wheels 408 penetrate through the corresponding telescopic joints, the steel wire rope 404 is wound around the wall-penetrating wheels 408 from the outer sides of the corresponding telescopic joints and enters the inner sides of the telescopic joints 408, the telescopic joints, the inner sides of the telescopic joints, the telescopic joints 404 are wound with the thickness of the telescopic joints and the steel wire rope 404, the telescopic joints 404 can be wound to the outer sides of the telescopic joints, and the telescopic joints 404 can be lifted and the telescopic joints can be lifted and accordingly, the telescopic joints with uniform force applied to the telescopic joints 404.
The steel wire rope 404 of each stage of telescopic cylinder is wound through the corresponding movable pulley block 410 and the fixed pulley block 411, then sequentially wound through the corresponding rope distributing wheel 405, the bottom steering wheel 406, the top steering wheel 407 at the outermost layer and the wall penetrating wheel 408 of the telescopic joint at the adjacent layer, and finally fixed at the position above the wall penetrating wheel 408 of the telescopic joint 403 at the innermost layer. Specifically, the outermost telescopic joint 401 of the first-stage telescopic cylinder 100 is fixed, the steel wire rope 404 is wound around the rope distributing wheel 405, then is wound around the bottom steering wheel 406, then is wound upwards to the top steering wheel 407 of the outermost telescopic joint 401, then is wound downwards to the wall penetrating wheel 408 of the secondary outer telescopic joint 402, at this time, the steel wire rope 404 is located on the outer side of the secondary outer telescopic joint 402, the steel wire rope 404 is wound on the wall penetrating wheel 408 for two turns, penetrates through a through hole in the secondary outer telescopic joint 402, enters the inner side of the secondary outer telescopic joint 402, then is wound upwards to the top steering wheel 407 of the secondary outer telescopic joint 402, is wound to the wall penetrating wheel 408 of the inner layer, is sequentially wound to the wall penetrating wheel 408 of the telescopic joint of the inner layer, then is wound to the inner side of the telescopic joint 403 of the inner layer, and the end part of the steel wire rope 404 is fixed above the wall penetrating wheel 408 of the telescopic joint 403 of the inner layer. The steel wire rope hydraulic lifting device 400 used for lifting the second-stage telescopic cylinder 200 is arranged in the innermost telescopic joint 403 of the first-stage telescopic cylinder 100, the steel wire rope 404 at the position bypasses a rope distributing wheel 405 and then bypasses a bottom steering wheel 406, then upwards winds the top steering wheel 407 of the innermost telescopic joint 403 of the first-stage telescopic cylinder 100, then downwards winds the top wall penetrating wheel 408 of the outermost telescopic joint 401 of the second-stage telescopic cylinder 200, at the moment, the steel wire rope 404 is positioned on the outer side of the outermost telescopic joint 401 of the second-stage telescopic cylinder 200, the steel wire rope 404 winds two turns on the wall penetrating wheel 408, penetrates through a through hole in the outermost telescopic joint 401 of the second-stage telescopic cylinder 200, enters the inner side of the outermost telescopic joint 401 of the second-stage telescopic cylinder 200, upwards winds the top wall penetrating wheel 407 of the outermost telescopic joint 401 of the second-stage telescopic cylinder 200, then winds the wall penetrating wheel 408 of the inner telescopic joint of the second-stage telescopic cylinder 200, and sequentially winds the wall penetrating wheel 408 of the innermost telescopic joint of the innermost telescopic cylinder 200, then winds the innermost telescopic joint 403 of the second-stage, and the end part of the steel wire rope is fixed above the wall penetrating wheel 408 of the innermost telescopic joint 403. By analogy, the hydraulic lifting of the steel wire ropes of all stages of telescopic cylinders is realized.
When the telescopic arm is used, as shown in fig. 2 to 5 together, after the steel wire rope 404 is wound and fixed in sequence, the piston rod of the hydraulic cylinder 409 of the last-stage telescopic cylinder 300 extends out, the lightest innermost telescopic joint 403 in the last-stage telescopic cylinder is lifted up in sequence section by section, then the hydraulic cylinder 409 of the next-stage telescopic cylinder starts to lift up, and the like, the hydraulic cylinder 409 of the first-stage telescopic cylinder 100 retracts until the telescopic arm is lifted to a required height, when the telescopic arm descends, the piston rod of the hydraulic cylinder 409 of the first-stage telescopic cylinder 100 retracts, the heaviest second outer telescopic joint 402 retracts first, then sequentially section by section, and then the piston rod of the hydraulic cylinder 409 of the second-stage telescopic cylinder 200 retracts, so that the second-stage telescopic cylinder 200 retracts, and then the last-stage telescopic cylinder 300 retracts.
As shown in fig. 7 and 8, the oil pipe transportation device 500 includes a mounting bracket 501, a core barrel 508 driven by a power mechanism is rotatably mounted on the mounting bracket 501 through a bearing seat, a partition 509 is disposed in the core barrel 508, the partition 509 divides an inner cavity of the core barrel 508 into an oil inlet cavity 5081 and an oil return cavity 5082, the oil inlet cavity 5081 and the oil return cavity 5082 are not communicated with each other, an oil inlet pipe 510 communicating with the oil inlet cavity 5081 is fixedly mounted on the core barrel 508, an oil return pipe 511 communicating with the oil return cavity 5082 is fixedly mounted on the core barrel 508, the oil inlet pipe 510 and the oil return pipe 511 extend out of the outer surface of the core barrel 508, the oil inlet cavity 5081 is connected to the oil inlet pipe 510 through a rotary joint, the oil return cavity 5082 is connected to the oil return pipe 511 through another rotary joint, a web plate 512 is fixedly mounted on the outer surface of the core barrel 508, a double-grooved wheel disc 502 is fixedly mounted on the web plate 512, the oil inlet barrel 508, the web plate 512 and the double-grooved wheel disc 502 are coaxially mounted, a rubber inlet rubber pipe 513 and an oil return rubber pipe 511 are respectively wound around the double-grooved wheel 502, a high pressure hose 513 and an oil return hose are adopted, one end of the oil inlet pipe 514 is connected to the oil return rubber hose 510, and one end of the oil return pipe 514 is connected to the oil return hose. In order to save the installation space, the web disc 512 is designed to be a hollow cavity structure, the oil inlet pipe 510 and the oil return pipe 511 both penetrate through the hollow cavity of the web disc 512, and the ends of the oil inlet rubber pipe 513 and the oil return rubber pipe 514 which are coiled at the innermost ring on the double-groove wheel disc 502 penetrate through the hollow cavity of the web disc 512 and are respectively connected with the oil inlet pipe 510 and the oil return pipe 511.
The installation support 501 is rotatably provided with a guide wheel 503, the guide wheel 503 is also provided with double grooves corresponding to the double-groove wheel disc 502 generally, a fuel inlet rubber tube 513 and a fuel return rubber tube 514 are respectively led out, a floating wheel 504 is arranged below the guide wheel 503, similarly, the floating wheel 504 is also provided with double grooves, the fuel inlet rubber tube 513 and the fuel return rubber tube 514 are connected with a hydraulic oil cylinder 409 of a rear-stage telescopic cylinder after passing through the guide wheel 503 and the floating wheel 504, the floating wheel 504 falls on the fuel inlet rubber tube 513 and the fuel outlet rubber tube through gravity, the fuel inlet rubber tube 513 and the fuel outlet rubber tube are tensioned, stable release or coiling of the fuel inlet rubber tube 513 and the fuel return rubber tube 514 is realized, and lifting and descending of a telescopic arm cannot be influenced by non-constant linear speed of the fuel inlet rubber tube 513 and the fuel return rubber tube 514 on the double-groove wheel disc 502.
The mounting bracket 501 is provided with a first sensor 505 and a second sensor 506, the first sensor 505 is positioned below the guide wheel 503 and above the floating wheel 504, the second sensor 506 is positioned below the floating wheel 504, and both the first sensor 505 and the second sensor 506 are connected with a power mechanism. The first sensor 505 is used for detecting the upper limit position of the floating wheel 504, the second sensor 506 is used for detecting the lower limit position of the floating wheel 504, when the first sensor 505 detects the floating wheel 504, the power mechanism is started to drive the double-groove wheel disc 502 to rotate, the wound oil inlet rubber pipe 513 and wound oil return rubber pipe 514 are released, and when the second sensor 506 detects the floating wheel 504, the power mechanism is stopped.
An extension spring 507 is arranged between the floating wheel 504 and the mounting bracket 501, one end of the extension spring 507 is fixed on the floating wheel 504, the other end of the extension spring 507 is fixed on the mounting bracket 501, and a pretightening force is applied to the oil feeding rubber tube 513 and the oil return rubber tube 514, so that the floating wheel 504 is prevented from moving upwards too fast and moving too long to fall out of the detection range of the first sensor 505.
The power mechanism comprises a motor 515 arranged on the mounting bracket, an outer gear ring 517 is fixedly arranged on the web disc 512, a transmission shaft 516 is rotatably arranged on the mounting bracket 501, a driving gear 518 meshed with the outer gear ring 517 is arranged at one end of the transmission shaft 516, the other end of the transmission shaft 516 is in transmission connection with the motor 515, the web disc 512 is driven to rotate through the rotation of the transmission shaft 516, so that the core barrel 508 and the double-groove wheel disc 502 are driven to rotate together, the oil inlet rubber tube 513 and the oil return rubber tube 514 are released and coiled, and the motor 515 and the transmission shaft 516 are in chain transmission connection.
When the hydraulic lifting arm is used, the outermost telescopic joint 401 of the first-stage telescopic cylinder 100 is located on the ground, pressure oil of a hydraulic oil cylinder 409 of the first-stage telescopic cylinder 100 can be directly introduced from an oil inlet pipeline and an oil return pipeline, a hydraulic oil cylinder 409 of the second-stage telescopic cylinder 200 is installed inside the innermost telescopic joint 403 of the first-stage telescopic cylinder 100, an oil pipe conveying device 500 needs to be installed at the bottom of the outermost telescopic joint 401 of the first-stage telescopic cylinder 100 to supply oil to the hydraulic oil cylinder 409 of the second-stage telescopic cylinder 200, similarly, an oil pipe conveying device 500 is arranged in the innermost telescopic joint 403 of the first-stage telescopic cylinder 100 to supply oil to the hydraulic oil cylinder 409 of the third-stage telescopic cylinder, and by analogy, an oil pipe conveying device 500 is arranged at the innermost telescopic joint 403 of the previous-stage telescopic cylinder to supply oil to the hydraulic oil cylinder 409 of the next-stage telescopic cylinder until the hydraulic oil cylinder 409 of the last-stage telescopic cylinder completes oil supply, the oil supplied by the previous-stage telescopic cylinder not only supplies oil to the hydraulic oil cylinder 409 of the next-stage telescopic cylinder, but also supplies oil to the oil pipe conveying device 500 located in the next-stage telescopic cylinder to realize continuous lifting arm conveying along with the lifting arm.
The embodiment of the invention has ingenious conception, realizes that the oil inlet rubber pipe 513 and the oil return rubber pipe 514 are released or coiled along with the expansion of the expansion arms, thereby satisfying the uninterrupted transmission of hydraulic oil power, ensuring the smooth lifting of the expansion arms, and each stage of expansion cylinder uses one hydraulic oil cylinder 409 to lift a plurality of expansion joints, thereby not only reducing the using amount of the hydraulic oil cylinders 409 and reducing the production cost, but also more importantly saving the installation space and realizing the vertical lifting.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (9)
1. A telescopic arm of a fire truck for a climbing platform comprises a plurality of stages of telescopic cylinders which are sequentially sleeved together, wherein each stage of telescopic cylinder comprises a plurality of telescopic joints which are sleeved together, and the telescopic arm is characterized in that each stage of telescopic cylinder is connected with a steel wire rope hydraulic lifting device, the steel wire rope hydraulic lifting device of a first stage of telescopic cylinder is arranged in the outermost telescopic joint, the steel wire rope hydraulic lifting device of a later stage of telescopic cylinder is arranged in the innermost telescopic joint of the previous stage of telescopic cylinder, the steel wire rope hydraulic lifting device comprises a hydraulic oil cylinder, the cylinder body of the hydraulic oil cylinder is fixedly arranged at the bottom of the corresponding telescopic joint, a fixed pulley block is arranged on the cylinder body of the hydraulic oil cylinder, a movable pulley block is arranged on the piston rod of the hydraulic oil cylinder, a steel wire rope is arranged between the hydraulic oil cylinder and the corresponding telescopic joint, one end of the steel wire rope is fixed, and the other end of the steel wire rope is fixed on the innermost telescopic joint of the stage of the telescopic cylinder after passing through the movable pulley block and the fixed pulley block; the outer telescopic joint of the rear-stage telescopic cylinder is sleeved in the innermost telescopic joint of the front-stage telescopic cylinder, an oil pipe conveying device used for supplying oil to the rear-stage telescopic cylinder is installed in the innermost telescopic joint of the front-stage telescopic cylinder, the oil pipe conveying device comprises an installation support, a core cylinder driven by a power mechanism is installed on the installation support in a rotating mode, a partition plate is arranged in the core cylinder and divides an inner cavity of the core cylinder into an oil inlet cavity and an oil return cavity, a web disc is fixedly installed on the outer surface of the core cylinder, a double-groove wheel disc is fixedly installed on the web disc, the core cylinder is fixedly installed with the oil inlet pipe communicated with the oil return pipe of the oil return cavity, the oil inlet cavity is connected with the oil inlet pipe through a rotary joint, the oil return pipe is connected with the oil return pipe through another rotary joint, a web disc is fixedly installed on the outer surface of the core cylinder, a double-groove wheel disc is fixedly installed on the web disc, the core cylinder, the web disc and the double-groove wheel disc are coaxially arranged, an oil inlet rubber pipe and an oil return rubber pipe are respectively coiled in the double-groove wheel disc, one end of the oil inlet rubber pipe is connected with the oil return pipe.
2. The elevating platform fire fighting truck telescopic boom according to claim 1, wherein the bottom of the outermost telescopic joint of the first stage telescopic cylinder and the bottom of the innermost telescopic joint of the previous stage telescopic cylinder are each provided with a rope distributing wheel for distributing the steel wire rope of the corresponding crown block to the corresponding position.
3. The elevating platform fire truck telescopic boom as claimed in claim 2, wherein wall-through wheels are mounted at the bottom of the telescopic joints except the outermost telescopic joint of the first stage telescopic cylinder, bottom steering wheels are mounted at the bottom of the inner sides of the outermost telescopic joint of the first stage telescopic cylinder and the innermost telescopic joint of the previous stage telescopic cylinder, and top steering wheels are mounted at the top of the inner sides of the telescopic joints except the innermost telescopic joint of the last stage telescopic cylinder.
4. The elevating platform fire truck telescopic boom of claim 3, wherein the wall penetrating wheel penetrates through the corresponding telescopic joint, and the steel wire rope is wound around the wall penetrating wheel at least two turns from the outside of the corresponding telescopic joint and enters the inside of the telescopic joint.
5. The elevating platform fire fighting truck telescopic boom according to claim 4, wherein the steel wire rope of each stage of telescopic cylinder is wound through the corresponding movable pulley block and fixed pulley block, then sequentially wound through the corresponding rope distributing wheel, bottom steering wheel, outermost top steering wheel and wall penetrating wheel of adjacent telescopic joint, and finally fixed at a position above the wall penetrating wheel of the innermost telescopic joint.
6. The elevating platform fire truck telescopic boom as claimed in any one of claims 1 to 5, wherein a guide wheel is rotatably mounted on the mounting bracket, a floating wheel is mounted below the guide wheel, and the oil inlet rubber pipe and the oil return rubber pipe are connected to the hydraulic cylinder of the next stage telescopic cylinder after passing through the guide wheel and the floating wheel.
7. The elevating platform fire fighting truck telescopic boom as claimed in claim 6, wherein a first sensor and a second sensor are provided on the mounting bracket, the first sensor is located below the guide wheel and above the floating wheel, the second sensor is located below the floating wheel, and both the first sensor and the second sensor are connected to the power mechanism.
8. The elevating platform fire fighting truck telescopic boom as claimed in claim 7, wherein an extension spring is provided between the floating wheel and the mounting bracket, and one end of the extension spring is fixed on the floating wheel and the other end is fixed on the mounting bracket.
9. The elevating platform fire fighting truck telescopic boom as claimed in claim 8, wherein the power mechanism comprises a motor mounted on the mounting bracket, an outer gear ring is fixedly mounted on the web plate, a transmission shaft is rotatably mounted on the mounting bracket, a driving gear engaged with the outer gear ring is mounted at one end of the transmission shaft, and the other end of the transmission shaft is in transmission connection with the motor.
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| CN202111052786.8A CN113682981B (en) | 2021-09-09 | 2021-09-09 | Flexible arm of platform fire engine ascends a height |
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| CN202111052786.8A CN113682981B (en) | 2021-09-09 | 2021-09-09 | Flexible arm of platform fire engine ascends a height |
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| CN113682981B true CN113682981B (en) | 2023-03-10 |
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| CN113682981A (en) | 2021-11-23 |
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