Multi-stage hydraulic pulley vertical lifting climbing platform fire truck

Abstract

The present invention discloses a multi-stage hydraulic multiplier pulley vertical lifting climbing platform fire truck, which belongs to the technical field of firefighting and rescue equipment. It includes a vehicle chassis (1), a telescopic arm (2) is attached to the tail of the vehicle chassis (1) by a hinged connection, a rotating platform (7) is provided at the end of the telescopic arm (2), a working arm is attached to the rotating platform (7), a working bucket (3) is attached to one end of the working arm, a reversible hydraulic oil cylinder (5) is provided on the vehicle chassis (1), front hydraulic outriggers (4) are respectively provided on the left and right sides of the vehicle chassis (1) near the vehicle cab, rear hydraulic outriggers (6) are respectively provided on the left and right sides of the telescopic arm (2) away from the vehicle cab, an auxiliary support oil cylinder (41) is provided on the vehicle chassis (1), and transitional hydraulic oil cylinders (7) are respectively provided on the left and right sides of the end of the vehicle chassis (1). This solves the technical problems of conventional high-altitude fire trucks, which have a small rescue radius at maximum height and a maximum rescue height that is significantly limited by the transmission type of the hydraulic oil cylinder, and is widely used in high-altitude firefighting or rescue.

Description

Technical Field

[0001] Embodiments of the present invention relate to the technical field of fire fighting and rescue equipment, and more specifically, to a multi-stage hydraulic doubling pulley vertical lifting type climbing platform fire truck.

Background Art

[0002] With the increase in high-rise buildings, the building height of high-rise buildings far exceeds the lifting height of fire fighting and rescue vehicles. For example, currently, the tallest aerial rescue fire truck in the world has a maximum rescue height of 112m, adopts a folding arm structure, the vehicle body length is 18.9m, width is 2.5m, height is 4m, the fire fighting and rescue radius at the maximum height is 6m, and the turning radius is large. When such a huge vehicle enters a residential area, sufficient roads for turning are required. However, in the current dense building groups, such rescue vehicles cannot enter. When the folding arm inversion structure mounted on the vehicle is operating, hydraulic outriggers need to be used to stabilize the entire vehicle. As a result, the hydraulic power is large, and since the folding arm inversion mechanism is on the vehicle, the center of gravity is high, the stability is poor, and the effect in fire fighting and rescue at high altitudes is insufficient. Also, in this aerial rescue fire truck, the swivel platform is at the bottom of the main telescopic arm and is attached to the vehicle chassis, and the work bucket is at the upper part of the main telescopic arm. The rescue position is specified by the rotation of the bottom swivel platform. Most of the conventional aerial rescue vehicles have a folding arm structure. When extended to the maximum height, the turning radius of the work bucket becomes very small, and the rescue distance is limited. In particular, rescue vehicles with a folding arm inversion structure are limited by the load of the folding arm and can only withstand the full load when the folding arm is extended by 70% or more. There are dead spots in rescue during the extension of the folding arm. That is, a fire truck with a rescue height of 88m cannot rescue below 60m. Therefore, when a high-rise building with a height of 88m is in danger, three fire trucks must be dispatched simultaneously to meet the rescue needs of the high, middle, and low floors. As a result, the equipment investment and rescue costs increase significantly.

[0003] There are also forms of telescopic cylinder structures with a limited number of sections. Both of these types of telescopic arms move up and down by the extension and retraction of a hydraulic cylinder, but the height they can be raised or lowered is greatly influenced by the transmission method of the hydraulic cylinder. Because extension and retraction are solely driven by the stroke of the hydraulic cylinder, it is difficult to match the rescue height of the telescopic arm to the building height of modern high-rise buildings.

[0004] Furthermore, the telescopic arms of these two structures are mounted to extend and retract at an angle, and the telescopic arms are mounted to a slewing platform, which has common drawbacks. Firstly, the rescue radius decreases as the extension height of the telescopic arms increases. Secondly, the slewing platform has a large range of motion, high energy consumption, poor stability, and a slow slewing speed.

[0005] Therefore, in the technical field of fire and rescue equipment, there remains a need for research and improvement on multi-stage hydraulic multiplier pulley vertical lifting platform fire trucks. This is a hot spot and focus of research in the current fire and rescue field, and also a starting point for completing the present invention. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Refer to the international survey report. [Overview of the Initiative] [Problems that the invention aims to solve]

[0007] Therefore, an embodiment of the present invention provides a multi-stage hydraulic multiplier pulley vertical lifting platform fire truck that solves the technical problems of conventional high-altitude fire trucks, such as the small rescue radius at maximum height and the fact that the maximum rescue height is greatly limited by the transmission method of the hydraulic oil cylinder. [Means for solving the problem]

[0008] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions. According to an embodiment of the present invention, a multi-stage hydraulic multiplier pulley vertical lifting climbing platform fire truck including a vehicle chassis is provided, wherein a telescopic arm is attached to the tail of the vehicle chassis by hinge connection, a slewing platform is provided at the tip of the telescopic arm, a work arm is attached to the slewing platform, a work bucket is attached to one end of the work arm, a reversing hydraulic oil cylinder is attached to the vehicle chassis, one end of the reversing hydraulic oil cylinder is attached to the vehicle chassis by hinge connection, and the other end is attached to the telescopic arm by hinge connection, front hydraulic outriggers are attached to the left and right sides of the vehicle chassis at a position close to the driver's cab of the vehicle, rear hydraulic outriggers are attached to the left and right sides of the telescopic arm at a position away from the driver's cab of the vehicle, an auxiliary support oil cylinder is provided on the vehicle chassis, the extension direction of the piston rod of the auxiliary support oil cylinder is vertically upward, and transition hydraulic oil cylinders are attached to the left and right sides at the end of the vehicle chassis.

[0009] Furthermore, the work arm includes a first fixed holder, the first fixed holder having one end connected to a second fixed holder and the other end being a first open portion, a first slide holder driven by a first power mechanism slidably mounted inside the first fixed holder, a counterweight attached to the end of the first slide holder extending from the first open portion, a second open portion provided at the end of the second fixed holder away from the first fixed holder, a second slide holder driven by a second power mechanism slidably mounted inside the second fixed holder, and the work bucket attached to the end of the second slide holder extending from the second open portion.

[0010] Furthermore, the second fixed holder is attached to the first fixed holder by a hinge connection via a hinge connecting shaft, and a positioning pin driven by a third power mechanism is provided between the second fixed holder and the first fixed holder.

[0011] Furthermore, a support arm is fixedly attached to the end of the first fixed holder closest to the second fixed holder, a support rope pulley is rotatably attached to the support arm, a hoist mechanism is provided at a position close to the first open portion of the first fixed holder, a lifting arm is provided on the second fixed holder, a lifting wire rope is provided between the hoist mechanism, the support rope pulley, and the lifting arm, and the end of the lifting arm away from the lifting point of the lifting wire rope is attached to the second fixed holder by a hinge connection.

[0012] Furthermore, the second fixing holder is provided with a first limiting block for limiting the vertical position of the lifting arm, and the second fixing holder is provided with a second limiting block for limiting the lifting point of the lifting arm to be lower than the outer plane of the second fixing holder.

[0013] Furthermore, the telescopic arm includes a plurality of sequentially fitted telescopic cylinders, each telescopic cylinder includes a plurality of integrally fitted telescopic sections, each telescopic cylinder is connected to a wire rope hydraulic lift device, the wire rope hydraulic lift device of the first telescopic cylinder is provided in the outermost telescopic section, the wire rope hydraulic lift device of the next telescopic cylinder is provided in the innermost telescopic section of the previous telescopic cylinder, the wire rope hydraulic lift device includes a lift hydraulic oil cylinder, the cylinder block of the lift hydraulic oil cylinder is fixedly attached to the bottom of the corresponding telescopic section, a group of fixed pulleys is attached to the cylinder block of the lift hydraulic oil cylinder, and the lift hydraulic oil A group of movable pulleys is attached to the piston rod of the oil cylinder, and a lift wire rope is provided between the lift hydraulic oil cylinder and the corresponding telescopic section. One end of the lift wire rope is fixed, and the other end is fixed to the innermost telescopic section of the telescopic cylinder of that stage via the group of movable and fixed pulleys. The outermost telescopic section of the next stage telescopic cylinder is fitted inside the innermost telescopic section of the previous stage telescopic cylinder. An oil pipe supply device for supplying oil to the next stage telescopic cylinder is installed inside the innermost telescopic section of the previous stage telescopic cylinder. The work bucket is attached to the top of the innermost telescopic section of the final stage telescopic cylinder, and the rear hydraulic outrigger is attached to the outer surface of the outermost telescopic section of the first stage telescopic cylinder.

[0014] Furthermore, sub-rope pulleys are attached to the bottom of both the outermost telescopic section of the first-stage telescopic cylinder and the innermost telescopic section of the preceding-stage telescopic cylinder to distribute the lift wire ropes of the corresponding fixed pulley group to their respective positions.

[0015] Furthermore, wall-penetrating wheels are attached to the bottom of any of the telescopic sections other than the outermost telescopic section of the first stage telescopic cylinder, bottom steering wheels are attached to the inner bottom of both the outermost telescopic section of the first stage telescopic cylinder and the innermost telescopic section of the preceding telescopic cylinder, and top steering wheels are attached to the inner top of any of the telescopic sections other than the innermost telescopic section of the final stage telescopic cylinder.

[0016] Furthermore, the wall-penetrating wheel penetrates the corresponding telescopic section, and the lifting wire rope is wrapped at least twice around the wall-penetrating wheel from the outside of the corresponding telescopic section and enters the inside of the telescopic section.

[0017] Furthermore, the lifting wire ropes of each telescopic tube are wound around the corresponding movable pulley group and fixed pulley group, then around the corresponding sub-rope pulley, bottom steering wheel, outermost top steering wheel, and wall-penetrating wheel of the telescopic section of the adjacent layer, and finally fixed above the wall-penetrating wheel of the innermost telescopic section.

[0018] Furthermore, a swing arm is provided between two adjacent telescopic sections, one end of which is attached to the outer telescopic section by a hinge connection, and the other end of which is provided with an inclined guide surface, and a roller is provided at the end of the swing arm closest to the inclined guide surface, and an adjustment screw is screwed into the flange at the tip of the outer telescopic section, the end of which contacts the inclined guide surface, and the outer edge of the roller contacts the outer surface of the inner telescopic section due to the action of the adjustment screw.

[0019] Furthermore, the oil pipe feeding device includes a mounting holder, the mounting holder is rotatably mounted on which a core cylinder driven by a fourth power mechanism is provided, a separator is provided inside the core cylinder, the separator divides the cavity of the core cylinder into an oil supply cavity and a return oil cavity, an oil supply pipe communicating with the oil supply cavity is fixedly attached to the core cylinder, an oil return pipe communicating with the return oil cavity is fixedly attached to the core cylinder, the oil supply cavity is connected to the oil supply pipeline via a rotary joint, and The return oil cavity is connected to the oil return pipeline via another rotary joint, a main body tray is fixedly attached to the outer surface of the core cylinder, a double-slotted wheel disc is fixedly attached to the main body tray, the core cylinder, the main body tray, and the double-slotted wheel disc are arranged coaxially, an oil supply hose and an oil return hose are wound around the double-slotted wheel disc, one end of the oil supply hose is connected to the oil supply pipe, and one end of the oil return hose is connected to the oil return pipe.

[0020] Furthermore, a guide wheel is rotatably mounted on the mounting holder, a floating wheel is provided below the guide wheel, and both the oil supply hose and the oil return hose are wrapped around the guide wheel and the floating wheel and connected to the lift hydraulic oil cylinder of the next stage telescopic cylinder.

[0021] Furthermore, the mounting holder is provided with a first sensor and a second sensor, the first sensor being located below the guide wheel and above the floating wheel, and the second sensor being located below the floating wheel, and both the first sensor and the second sensor are connected to the fourth power mechanism.

[0022] Furthermore, a tension spring is provided between the floating wheel and the mounting holder, with one end of the tension spring fixed to the floating wheel and the other end fixed to the mounting holder.

[0023] Furthermore, the fourth power mechanism includes a motor attached to the fixed holder, an outer ring gear is fixedly attached to the main body tray, a transmission shaft is rotatably attached to the attachment holder, and a drive gear meshing with the outer ring gear is attached to one end of the transmission shaft, and the other end is transmission-connected to the motor.

Advantages of the Invention

[0024] The embodiments of the present invention have the following advantages. (1) In the present invention, the swivel platform is attached to the tip of the telescopic arm, and the work bucket is attached to the second slide holder. Therefore, the angle, position, and extension length of the work bucket can be adjusted according to the rescue target. The turning radius of the work bucket is large, the rescue radius is large, the use range of the present invention is expanded, and since the swivel platform is provided at the tip, the turning amount is small, and the swivel platform can be rotated by a small-output motor, thereby greatly reducing the energy consumption, significantly increasing the turning speed, and improving the stability. Since the telescopic arm is hinged to the end of the vehicle chassis, during operation, the reversing hydraulic oil cylinder reverses the telescopic arm until it is in a vertical state, and the bottom of the telescopic arm gets closer to the ground. Compared with the conventional structure where the folding arm is located above the vehicle chassis, the center of gravity of the telescopic arm is lowered, the stability of the telescopic arm is improved, and the telescopic height is set to the rescue height by the vertical lifting and lowering of the telescopic arm. (2) By providing the traveling hydraulic oil cylinder, the technical problem regarding the instability during the reversal of the telescopic arm is solved, ensuring the use stability of the embodiments of the present invention. (3) Since the second fixed holder is attached to the first fixed holder by hinge connection via the hinge connection shaft, it enables the reversal around the hinge connection shaft of the second fixed holder, realizes folding and transportation, and reduces the occupied space. (4) In the present invention, by lifting a plurality of telescopic parts with one lift hydraulic oil cylinder, not only the number of lift hydraulic oil cylinders used is reduced, the production cost is reduced, but also the installation space is saved, enabling the arrangement of more telescopic parts, increasing the telescopic length, and solving the technical problem of the conventional telescopic cylinder structure that the further improvement of the lift height of the telescopic arm is limited by the transmission form of the hydraulic oil cylinder. In addition, the cross-sectional area of the telescopic part is increased as much as possible to improve the stability of the telescopic part during telescoping. (5) Wall-penetrating wheels are attached to the bottom of each telescopic part. The lifting wire rope is wound around the wall-penetrating wheel at least twice from the outside of the corresponding telescopic part and enters the inside of the telescopic part. The wall-penetrating wheel has a groove width that is only the diameter of three turns of the lifting wire rope, and the width direction of the wheel coincides with the thickness direction of the steel plate of the telescopic part, thereby minimizing the internal space of the telescopic part, increasing the utilization rate of the effective cross-sectional area of the telescopic part. When the lifting wire rope lifts the telescopic part, a force is applied to the bottom, balancing the force received by each telescopic part during lifting and lowering, and making the telescopic part lift and lower more stably. (6) In the present invention, a structure of a telescopic arm that moves vertically up and down is adopted, and the working bucket is attached to the second slide holder. In the embodiments of the present invention, during the telescoping process of the telescopic arm, the rescue radius is kept large while avoiding the existence of rescue dead spots.

Brief Description of the Drawings

[0025] To more clearly explain the embodiments of the present invention or the technical solutions of the prior art, the drawings necessary for explaining the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are merely illustrative, and those skilled in the art can also obtain other implementation drawings from the provided drawings without creative effort.

[0026] The structures, proportions, sizes, etc., described herein are used solely for the purpose of being understood and viewed by those skilled in the art, and in combination with the content disclosed herein, and are not intended to limit the limitations on which the invention can be implemented. They have no substantive technical significance, and any modification of structure, alteration of proportions, or adjustment of size shall remain within the scope covered by the technical content disclosed herein, without affecting the effects that the invention may produce or the objectives that it may achieve.

[0027] [Figure 1] This is a schematic diagram of the structure of an embodiment of the present invention. [Figure 2] This is a schematic diagram of the reversing state of the telescopic arm according to an embodiment of the present invention. [Figure 3] This is a schematic diagram of the completed reversal state of the telescopic arm according to an embodiment of the present invention. [Figure 4] This is a schematic diagram illustrating the structure of the connection between the counterweight and the work bucket according to an embodiment of the present invention. [Figure 5] Figure 4 is a schematic diagram of the AA section. [Figure 6] This is a schematic diagram of the structure of a telescopic arm according to an embodiment of the present invention. [Figure 7] This is a schematic diagram of the structure in which the lifting wire rope is wound around the first stage telescopic cylinder according to an embodiment of the present invention. [Figure 8] Figure 7 is a schematic diagram of the structure of the outermost expandable section. [Figure 9] Figure 8 is a schematic diagram of the BB cross-section. [Figure 10] Figure 8 is a schematic diagram of the CC cross-section. [Figure 11] This diagram shows the winding relationship of the lift wire ropes around two adjacent telescopic sections according to an embodiment of the present invention. [Figure 12] This is a schematic diagram illustrating the structure of the connection between two adjacent expandable sections according to an embodiment of the present invention. [Figure 13] Figure 12 is a schematic diagram of the DD structure. [Figure 14]Figure 12 is an enlarged schematic diagram of the structure of section E. [Figure 15] This is a schematic diagram of the structure of an oil pipe feeding device in an embodiment of the present invention. [Figure 16] Figure 15 is a schematic diagram of the FF structure. [Figure 17] This figure shows the hydraulic principle of a hydraulic outrigger in an embodiment of the present invention. [Figure 18] This is a schematic diagram of the structure of a hydraulic outrigger in an embodiment of the present invention. [Explanation of symbols]

[0028] 1. Car chassis 2 Extendable Arms 201 First stage telescopic tube 202 Second section telescopic tube 203 Final stage telescopic tube 204 Wire Rope Hydraulic Lifting Device 20401 Outermost elastic part 20402 Second outer expandable section 20403 Innermost elastic part 20404 Wire rope for lifts 20405 Sub-rope pulley 20406 Bottom Steering Wheel 20407 Top Steering Wheel 20408 Wall-penetrating wheel 20409 Lift Hydraulic Oil Cylinder 20410 Movable pulley group 20411 Fixed pulley group 20412 Flange 20413 Swivel Arm 20414 Inclined guideway 20415 Adjustment Screw 20416 Lock Nut 20417 Internal Restriction Block 20418 Laura 20419 External Restriction Block 205 Oil pipe feeding device 20501 Mounting holder 20502 Wheel disc with double slot 20503 Guide Wheel 20504 Floating Wheel 20505 First Sensor 20506 Second Sensor 20507 Tension spring 20508 Core cylinder 205081 Fueling Cavity 205082 Return oil cavity 20509 Separator 20510 Fuel pipe 20511 Oil return pipe 20512 Main unit tray 20513 Fuel hose 20514 Oil return hose 20515 Motor 20516 Transmission shaft 20517 Outering Gear 20518 Drive Gear 3. Work bucket 4. Front hydraulic outriggers 5. Reversing hydraulic oil cylinder 6. Rear hydraulic outriggers 7. Transition Hydraulic Oil Cylinder 8. Swivel Platform 9. First fixed holder 10. First slide holder 11 Counterweights 12 First Motor 13. First drive sprocket 14. First driven sprocket 15. First Chain 16. Second motor 17. Second drive sprocket 18. Second driven sprocket 19 Second Chain 20 Second fixed holder 21. Second slide holder 22 Hinge connecting shaft 23 Positioning pins 24 Support Arms 25 Support rope pulley 26 Hoist mechanism 27 Lifting Arm 28 Lifting wire rope 29. First Restriction Block 30 Second Restriction Block 31. Second connecting plate 32 Horizontal oil cylinders 3201 First Cylinder Block 3202 Second Cylinder Block 3203 Third Cylinder Block 3204 Plunger 3205 1st center cylinder 3206 2nd center cylinder 3207 Third center cylinder 3208 Oil port 3209 First horizontal hydraulic oil port 3210 Second horizontal hydraulic oil port 33. Vertical oil cylinder 3301 First Casing 3302 Second Casing 3303 Third Casing 3304 Fourth Casing 3305 Fifth Casing 3306 Casing No. 6 34 Fueling pipeline 35 Oil return pipeline 36. First Directional Control Valve 37. Second Directional Control Valve 38. First pilot check valve 39. Second pilot check valve 40 Tilt Angle Sensor 41 Auxiliary support oil cylinder [Modes for carrying out the invention]

[0029] The embodiments of the present invention will be described below by specific examples, but those skilled in the art will readily understand other advantages and benefits of the present invention from what is disclosed herein. Clearly, the examples described are only some, and not all, examples of the present invention. All other examples obtained by those skilled in the art without creative effort based on the examples of the present invention are within the scope of the protection of the present invention.

[0030] Terms such as “front,” “back,” “left,” “right,” “middle,” “up,” and “down,” as used herein, are also intended to facilitate explanation and not to limit the scope of the invention. Changes or adjustments to their relative relationships may be considered within the scope of the invention even if they do not substantially alter the technical content.

[0031] As shown in Figures 1, 3, and 4, an embodiment of the present invention provides a multi-stage hydraulic multiplier pulley vertical lifting climbing platform fire truck, which includes a vehicle chassis 1, and a telescopic arm 2 is attached to the tail of the vehicle chassis 1 by a hinge connection, and the distance from the bottom of the telescopic arm 2 to the hinge connection point between the telescopic arm 2 and the vehicle chassis 1 is less than or equal to the height of the vehicle chassis 1, thereby ensuring that the telescopic arm 2 can be reversed to its vertical position, a swivel platform 8 is provided at the tip of the telescopic arm 2, a work arm is attached to the swivel platform 8, a work bucket 3 is attached to one end of the work arm, and the work arm is first fixed The first fixed holder 9 is connected at one end to the second fixed holder 20 and has a first opening at the other end. A first slide holder 10, driven by a first power mechanism, is slidably mounted inside the first fixed holder 9, and a counterweight 11 is attached to the end of the first slide holder 10 that extends from the first opening. A second opening is provided at the end of the second fixed holder 20 that is away from the first fixed holder 9, and a second slide holder 21, driven by a second power mechanism, is slidably mounted inside the second fixed holder 20, and a work bucket 3 is attached to the end of the second slide holder 21 that extends from the second opening. The first fixed holder 9 and the second fixed holder 20 are both rectangular tubular structures, generally made by welding steel beams. Similarly, the first slide holder 10 and the second slide holder 21 also employ welded rectangular tubular structures, and the shape of their cross-sections matches the shape of the corresponding internal cross-sections of the first fixed holder 9 and the second fixed holder 20. A reversing hydraulic oil cylinder 5 is attached to the vehicle chassis 1. One end of the reversing hydraulic oil cylinder 5 is attached to the vehicle chassis 1 by a hinge connection, and the other end is attached to the telescopic arm 2 by a hinge connection. In the vertical position, the hinge connection point between the reversing hydraulic oil cylinder 5 and the telescopic arm 2 is higher than the hinge connection point between the telescopic arm 2 and the vehicle chassis 1. This lowers the height of the center of gravity, improves stability, and allows the telescopic arm 2 to move vertically, with the maximum extension length being the maximum rescue height.Front hydraulic outriggers 4 are mounted on the left and right sides of the vehicle chassis 1, close to the driver's cab, and rear hydraulic outriggers 6 are mounted on the left and right sides of the telescopic arm 2, further away from the driver's cab. An auxiliary support oil cylinder 41 is provided on the vehicle chassis 1, and the piston rod of the auxiliary support oil cylinder 41 is oriented vertically upward in its extension direction to lift and support the telescopic arm 2. First, the auxiliary support oil cylinder 41 lifts the telescopic arm 2 to a predetermined height, and then the reversing hydraulic oil cylinder 5 reverses the telescopic arm 2 until it is in a vertical position. In this way, the mounting inclination angle of the reversing hydraulic oil cylinder 5 is reduced, saving vertical space above the vehicle chassis 1.

[0032] When the telescopic arm 2 is mounted horizontally on the vehicle chassis 1, the mounting angle between the axis of the reversing hydraulic oil cylinder 5 and the vehicle chassis 1 is less than 5 degrees, and the piston rod of the auxiliary support oil cylinder 41 abuts against the telescopic arm 2. With this structure, the vertical space above the vehicle chassis 1 occupied by the reversing hydraulic oil cylinder 5 is significantly reduced, and the limited vertical space above the vehicle chassis 1 is utilized as much as possible as cross-sectional area for the telescopic arm 2, thereby maximizing the effective rescue height of the telescopic arm 2.

[0033] As shown in Figure 2, when the reversing hydraulic oil cylinder 5 is reversed, the hydraulic outrigger 6 attached to the telescopic arm 2 is not yet supported by the ground, and the balance and stability of the vehicle cannot be easily maintained by the two front hydraulic outriggers 4 on the left and right. Therefore, in order to solve the technical problem of instability during the reversal of the telescopic arm 2, the inventors of the present invention conducted diligent research and adopted a technical proposal in which a transition hydraulic oil cylinder 7 is attached to the left and right ends of the vehicle chassis 1.

[0034] As shown in Figure 4, the first power mechanism includes a first drive sprocket 13 rotatably mounted on a first fixed holder 9 and driven by a first motor 12, and a first driven sprocket 14 rotatably mounted on the other end of the first fixed holder 9, the first drive sprocket 13 being located at the end closer to the second fixed holder 20, and the first driven sprocket 14 being close to the first opening, a first chain 15 stretched between the first drive sprocket 13 and the first driven sprocket 14, a first connecting plate fixedly attached to the first chain 15, one end of which is fixed to the first chain 15 and the other end of which is fixed to the first slide holder 10, the first slide holder 10 being driven to reciprocate and slide by the forward and reverse rotation of the first motor 12, thereby moving the counterweight 11 and achieving the purpose of balancing the work bucket 3. Of course, a pulley rail assembly may be provided between the first fixed holder 9 and the first slide holder 10 to achieve the effect of making the slide smoother.

[0035] As shown in Figures 4 and 5, the second power mechanism includes a second drive sprocket 17 rotatably mounted on the second fixed holder 20 and driven by a second motor 16, and a second driven sprocket 18 rotatably mounted on the other end of the second fixed holder 20. The second drive sprocket 17 is located at the end closer to the first fixed holder 9, and the second driven sprocket 18 is located closer to the second opening. A second chain 19 is stretched between the second drive sprocket 17 and the second driven sprocket 18, and a second connecting plate 31 is fixedly attached to the second chain 19. One end of the second connecting plate 31 is fixed to the second chain 19, and the other end is fixed to the second slide holder 21. The second slide holder 21 is driven to reciprocate and slide by the forward and reverse rotation of the second motor 16, thereby moving the work bucket 3 and achieving the objective of approaching the rescue target. Of course, a pulley rail assembly may be provided between the second fixed holder 20 and the second slide holder 21 to achieve the effect of making the slide smoother.

[0036] The second fixed holder 20 is attached to the first fixed holder 9 by a hinge connection via a hinge connecting shaft 22, which allows the second fixed holder 20 to be reversed around the hinge connecting shaft 22, enabling it to be folded for transport and reducing the space it occupies. A positioning pin 23 driven by a third power mechanism is provided between the second fixed holder 20 and the first fixed holder 9. When operating normally, the positioning pin 23 integrally connects the first fixed holder 9 and the second fixed holder 20, and the third power mechanism is typically an air cylinder, a hydraulic cylinder, or an electric push rod.

[0037] A support arm 24 is fixedly attached to the end of the first fixed holder 9 closest to the second fixed holder 20, and a support rope pulley 25 is rotatably attached to the support arm 24. The support rope pulley 25 protrudes from the outer surface of the second fixed holder 20, and a hoist mechanism 26 is provided near the first opening of the first fixed holder 9. A lifting arm 27 is provided on the second fixed holder 20, and the lifting point of the lifting arm 27 protrudes from the outer surface of the second fixed holder 20, but its height is lower than that of the support rope pulley 25. A lifting wire rope 28 is provided between the hoist mechanism 26, the support rope pulley 25, and the lifting arm 27. One end of the lifting wire rope 28 is fixed to the hoist mechanism 26, and the other end is tightly wrapped around the support rope pulley 25 before being fixed to the lifting point of the lifting arm 27. Under the power of the hoist, the second fixed holder 20 is gradually pulled toward the first fixed holder 9 around the hinge connecting shaft 22. Once the second fixed holder 20 is coupled with the first fixed holder 9, the third power mechanism pushes the positioning pin 23, connecting the first fixed holder 9 and the second fixed holder 20 as a single unit. The hoist mechanism 26 is known to those skilled in the art and can be purchased and used according to the required model number, so it will not be described in detail here.

[0038] In the lifting arm 27, the end of the lifting wire rope 28 away from the lifting point is attached to the second fixing holder 20 by a hinge connection. To avoid excessive height during transport, the lifting arm 27 can be inverted below the outer plane of the second fixing holder 20. The second fixing holder 20 is provided with a first limiting block 29 to limit the vertical position of the lifting arm 27, and the first limiting block 29 acts as a stopper when lifting. The second fixing holder 20 is also provided with a second limiting block 30 to limit the lifting point of the lifting arm 27 to be lower than the outer plane of the second fixing holder 20, and the second limiting block 30 acts as a stopper during transport.

[0039] During transport, as shown in Figure 1, the telescopic arm 2 is positioned horizontally on the vehicle chassis 1, the first slide holder 10 is retracted into the first fixed holder 9, and the slewing platform 8 and the first fixed holder 9 are attached to the top of the telescopic arm 2. When the positioning pin 23 opens, the second fixed holder 20 flips over to the side of the telescopic arm 2 and is positioned just above the top of the vehicle, and the lifting arm 27 flips over to the position of the second limiting block 30 and is hidden below the outer plane of the second fixed holder 20, thus the overall structure is compact and occupies little space.

[0040] As shown in Figure 6, the telescopic arm 2 includes multiple telescopic cylinders that are sequentially fitted onto the outside, each telescopic cylinder including multiple telescopic sections integrally fitted onto the outside, and each telescopic cylinder is connected to a wire rope hydraulic lift device 204. The wire rope hydraulic lift device 204 of the first telescopic cylinder 201 is located inside the outermost telescopic section 20401, and the wire rope hydraulic lift device 204 of the next telescopic cylinder is located inside the innermost telescopic section 20403 of the previous telescopic cylinder. As shown in Figures 7, 8, 9, and 10, the wire rope hydraulic lift device 204 includes a lift hydraulic oil cylinder 20409. The cylinder block of the lift hydraulic oil cylinder 20409 is fixedly mounted at the bottom of the internal space of the corresponding telescopic section. A fixed pulley group 20411 is attached to the cylinder block of the lift hydraulic oil cylinder 20409. A movable pulley group 20410 is attached to the piston rod of the lift hydraulic oil cylinder 20409. A lift wire rope 20404 is provided between the lift hydraulic oil cylinder 20409 and the corresponding telescopic section. One end of the lift wire rope 20404 is fixed, and this fixed end is usually fixed to the cylinder block of the lift hydraulic oil cylinder 20409 or to the outermost telescopic section 20401. The other end is fixed to the innermost telescopic section 20403 of the telescopic cylinder of that stage, via the movable pulley group 20410 and the fixed pulley group 20411. The number of movable pulleys in the movable pulley group 20410 and the number of fixed pulleys in the fixed pulley group 20411 are determined by those skilled in the art, depending on the number of telescopic sections, such that the stroke of the lift hydraulic oil cylinder 20409 fixed within the outermost telescopic section 20401 allows for extension and retraction by all telescopic sections, that is, a lift hydraulic oil cylinder 20409 of the length of one telescopic section allows for extension and retraction by all telescopic sections.For example, if there are a total of six telescopic sections, the movable pulley group 20410 has three movable pulleys, and the fixed pulley group 20411 has three fixed pulleys. The lift wire rope 20404 is fixed at one end to a predetermined position on the cylinder block of the lift hydraulic oil cylinder 20409, and the other end is fixed on the innermost telescopic section 20403 after passing through the movable pulley and fixed pulley, respectively. The transmission ratio of such a three-stage movable pulley structure is 1:6. That is, when the piston rod of the lift hydraulic oil cylinder 20409 extends or retracts by 1m, the telescopic section moves by 6m. In this way, a hydraulic cylinder with an 8m stroke can accommodate a telescopic section with an extension length of 48m. If three telescopic cylinders are connected in series and the extension length of each telescopic arm 2 is 48m, a rescue height of 144m can be obtained. The objective of increasing the rescue height can be achieved by increasing the transmission ratio, increasing the length of the telescopic section, or increasing the stroke of the lift hydraulic oil cylinder 20409. This solves the technical challenge of the telescopic cylinder structure, where the lifting height of the telescopic arm 2 is greatly limited by the transmission method of the lift hydraulic oil cylinder 20409, as it significantly exceeds the conventional maximum rescue height of 112m. The outermost telescopic section 20401 of the next telescopic cylinder is fitted inside the innermost telescopic section 20403 of the previous telescopic cylinder, and an oil pipe feeding device 205 for supplying oil to the next telescopic cylinder is installed inside the innermost telescopic section 20403 of the previous telescopic cylinder.

[0041] Sub-rope pulleys 20405 are attached to the bottom of both the outermost telescopic section 20401 of the first stage telescopic cylinder 201 and the innermost telescopic section 20403 of the preceding telescopic cylinder to distribute the lift wire ropes 20404 of the corresponding fixed pulley group 20411 to the corresponding positions. Taking the telescopic arm 2 with a square cross-section as an example, it is usually necessary to arrange lifting points in four directions. In this case, the sub-rope pulleys 20405 require four groove structures, and the four lift wire ropes 20404 need to be distributed to four different side walls in order to ensure the synchronization and balance of each telescopic section during lifting.

[0042] A wall-penetrating wheel 20408 is attached to the bottom of any of the telescopic sections other than the outermost telescopic section 20401 of the first stage telescopic cylinder 201, and as shown in Figure 11, the wall-penetrating wheel 20408 is rotatably mounted to the corresponding telescopic section via a bearing base, and a through hole is made in the telescopic section corresponding to the position of the wall-penetrating wheel 20408 for the wall-penetrating wheel 20408 to pass through, and a bottom steer is attached to the inner bottom of both the outermost telescopic section 20401 of the first stage telescopic cylinder 201 and the innermost telescopic section 20403 of the previous stage telescopic cylinder. A steering wheel 20406 is attached, and top steering wheels 20407 are attached to the inner tops of all other telescopic sections of the final telescopic tube 203 except for the innermost telescopic section 20403. A wall-penetrating wheel 20408 penetrates the corresponding telescopic section, and the groove width of the wall-penetrating wheel 20408 corresponds to approximately three turns of the diameter of the lift wire rope 20404. The width direction of the wheel coincides with the thickness direction of the steel plate of the telescopic section, thereby maximizing the saving of internal space in the telescopic section and increasing the utilization rate of the effective cross-sectional area of ​​the telescopic section. The lift wire rope 20404 is wrapped at least twice around the wall-penetrating wheel 20408 from the outside of the corresponding telescopic section and enters the inside of the telescopic section. The number of wraps is set according to the thickness of the wall plate of the telescopic section and the thickness of the lift wire rope 20404. Typically, the diameter of the lift wire rope 20404 is larger than the thickness of the wall plate of the telescopic section, so when the lift wire rope 20404 is wrapped twice, it goes from the outside of the telescopic section to the inside of the said telescopic section. By wrapping the lift wire rope 20404 in this way, the lift wire rope 20404 applies force to the bottom when lifting the telescopic section, balancing the forces received by each telescopic section as it moves up and down, and allowing the telescopic section to move up and down more stably.

[0043] The lifting wire ropes 20404 of each telescopic tube are wound around the corresponding movable pulley group 20410 and fixed pulley group 20411, then around the corresponding sub-rope pulley 20405, bottom steering wheel 20406, outermost top steering wheel 20407, and wall-penetrating wheel 20408 of the telescopic section of the adjacent layer, and finally fixed above the wall-penetrating wheel 20408 of the innermost telescopic section 20403. Specifically, the outermost telescopic section 20401 of the first telescopic cylinder 201 is fixed, the lift wire rope 20404 is wound around the sub-rope pulley 20405, then through the bottom steering wheel 20406, and then around the top steering wheel 20407 of the upper outermost telescopic section 20401, and then around the wall-penetrating wheel 20408 of the lower second outer telescopic section 20402, at which point the lift wire rope 20404 is located outside the second outer telescopic section 20402, and the lift wire rope 20404 penetrates the wall. It is wrapped twice around the through wheel 20408, passes through the through hole in the second outer telescopic section 20402, enters the inside of the second outer telescopic section 20402, and then wraps around the top steering wheel 20407 of the upper second outer telescopic section 20402, wraps around the innermost wall-penetrating wheel 20408, and thus wraps around the wall-penetrating wheel 20408 of the innermost telescopic section 20403, and then wraps around the inside of the innermost telescopic section 20403, with its end fixed above the wall-penetrating wheel 20408 of the innermost telescopic section 20403.Inside the innermost telescopic section 20403 of the first stage telescopic cylinder 201, a wire rope hydraulic lift device 204 for lifting the second stage telescopic cylinder 202 is provided. The lift wire rope 20404 in this position is wound around a sub-rope pulley 20405, then through the bottom steering wheel 20406, and then around the top steering wheel 20407 of the innermost telescopic section 20403 of the upper first stage telescopic cylinder 201, and then around the wall-penetrating wheel 20408 of the outermost telescopic section 20401 of the lower second stage telescopic cylinder 202. At this time, the lift wire rope 20404 is located outside the outermost telescopic section 20401 of the second stage telescopic cylinder 202, and the lift wire rope The rope 20404 is wrapped twice around the wall-penetrating wheel 20408, passes through the through-hole in the outermost telescopic section 20401 of the second stage telescopic cylinder 202, enters the inside of the outermost telescopic section 20401 of the second stage telescopic cylinder 202, then wraps around the top steering wheel 20407 of the outermost telescopic section 20401 of the upper second stage telescopic cylinder 202, then wraps around the wall-penetrating wheel 20408 of the inner layer telescopic section of the second stage telescopic cylinder 202, and in the same way wraps around the wall-penetrating wheel 20408 of the innermost telescopic section 20403, then wraps inside the innermost telescopic section 20403 of the second stage, and its end is fixed above the wall-penetrating wheel 20408 of the innermost telescopic section 20403. In this way, wire rope hydraulic lifting of all stages of the telescopic cylinder is achieved.

[0044] As shown in Figures 12, 13, and 14, a flange 20412 is provided at the tip of each expandable section, the inner expandable section passes through the flange 20412 at the tip of the outer expandable section, the gap between the flange hole at the tip of the outer expandable section and the outer surface of the inner expandable section is a sliding gap, a swing arm 20413 is provided between two adjacent expandable sections, one end of the swing arm 20413 is attached to the outer expandable section by a hinge connection, and the other end is provided on the inclined guide surface 20414, and the angle formed by the symmetrical center plane between the inclined guide surface 20414 and the swing arm 20413 is acute. A roller 20418 is provided at the end of the oscillating arm 20413 closest to the inclined guide surface 20414, and the pivot center of the oscillating arm 20413 and the pivot center of the roller 20418 are arranged parallel to each other. An adjustment screw 20415 is screwed into the flange 20412 at the tip of the outer telescopic section, and the end of the adjustment screw 20415 abuts against the inclined guide surface 20414. Due to the action of the adjustment screw 20415, the outer edge of the roller 20418 abuts against the outer surface of the inner telescopic section, thereby reducing the swaying gap between two adjacent telescopic sections and improving the stability of the inner telescopic section during expansion and contraction.

[0045] The cross-sectional shape of the expandable section is rectangular, and each expandable section is a cylindrical structure surrounded by four rectangular plates. The rectangular cross-section of the expandable section prevents rotation during expansion and contraction, improving the stability of the expandable section.

[0046] Each panel of the inner expansion section is in contact with at least two sets of rollers 20418, spaced apart, and each roller 20418 is located at the corner of the corresponding expansion section. If the surface area of ​​the panel is large, more rollers 20418 may be provided, and to further improve the stability of the inner expansion section during expansion and contraction, corresponding rollers 20418 may be provided at both the corners and the center of the expansion section.

[0047] A lock nut 20416 is provided between the adjustment screw 20415 and the flange 20412. When the outer edge of the roller 20418 contacts the outer surface of the inner layer expansion section, the lock nut 20416 is tightened, and the end face of the lock nut 20416 contacts the end face of the flange 20412. This prevents the adjustment screw 20415 from loosening during expansion and contraction of the expansion section, thereby preventing large gaps from occurring in the inner layer expansion section.

[0048] An internal limiting block 20417 is provided on the outer surface of the bottom of the inner expansion section, and the gap between the internal limiting block 20417 and the inner surface of the outer expansion section must be adjusted to be smaller than the sliding gap. In this case, an external limiting block 20419 is provided on the inner surface of the top of the outer expansion section, and similarly, the gap between the internal limiting block 20417 and the inner surface of the outer expansion section must be adjusted to be smaller than the sliding gap, thereby further improving the stability of the inner expansion section during expansion and contraction. Each panel of the inner expansion section is provided with at least one set of internal limiting blocks 20417 and external limiting blocks 20419. Those skilled in the art can select the number of internal limiting blocks 20417 and external limiting blocks 20419 on each panel, or determine the mounting positions of the internal limiting blocks 20417 and external limiting blocks 20419, according to the size of the panel surface of the expansion section, so this will not be explained in detail here. When the upper surfaces of all internal limiting blocks 20417 are on the same horizontal plane and the lower surfaces of all external limiting blocks 20419 are on the same horizontal plane, and the internal limiting blocks 20417 and external limiting blocks 20419 come into contact, the coaxiality of the inner and outer expansion / contraction sections coincides, thereby ensuring the verticality of the expansion / contraction section when it is operating normally, and further improving the usability of the present invention.

[0049] In this embodiment of the present invention, a swing arm 20413 is provided near the flange 20412 of the outer telescopic section, and a roller 20418 is provided on the swing arm 20413. An adjustment screw 20415 contacts the swing arm 20413, causing the outer edge of the roller 20418 to contact the outer surface of the inner telescopic section. In this way, the sliding gap between adjacent telescopic sections is reduced, and an internal limiting block 20417 is attached to the bottom of the inner telescopic section, further improving the stability of the inner telescopic section during extension and retraction. The external limiting block 20419 also performs a limiting action, effectively preventing the inner telescopic section from coming loose. When the inner telescopic section is extended to its maximum length, the internal limiting block 20417 contacts the external limiting block 20419, thereby aligning the axes of the inner and outer telescopic sections. Consequently, this structure allows for vertical movement, improves stability, and the maximum rescue height of the telescopic arm 2 is equal to its own extension length.

[0050] As shown in Figures 15 and 16, the oil pipe feeder 205 includes a mounting holder 20501, on which a core cylinder 20508 driven by a fourth power mechanism is rotatably mounted via a bearing base, and a separator 20509 is provided inside the core cylinder 20508, and the separator 20509 divides the cavity of the core cylinder 20508 into an oil supply cavity 205081 and a return oil cavity 205082. The oil supply cavity 205081 and the return oil cavity 205082 are not connected to each other, and an oil supply pipe 20510 communicating with the oil supply cavity 205081 is fixedly attached to the core cylinder 20508, and an oil return pipe 20511 communicating with the return oil cavity 205082 is fixedly attached to the core cylinder 20508, and the oil supply pipe 20510 and the oil return pipe 20511 extend from the outer surface of the core cylinder 20508, and the oil supply cavity The cavity 205081 is connected to the oil supply line 34 via a rotary joint, and the oil return cavity 205082 is connected to the oil return line 35 via another rotary joint. The main body tray 20512 is fixedly attached to the outer surface of the core cylinder 20508, and the double-slotted wheel disc 20502 is fixedly attached to the main body tray 20512. The core cylinder 20508, the main body tray 20512, and the double-slotted wheel disc 20502 are arranged coaxially, and the oil supply hose 20513 and the oil return hose 20514 are wound inside the double-slotted wheel disc 20502, respectively. Both the oil supply hose 20513 and the oil return hose 20514 are high-pressure hoses, one end of the oil supply hose 20513 is connected to the oil supply pipe 20510, and one end of the oil return hose 20514 is connected to the oil return pipe 20511. To save installation space, the main tray 20512 is designed as a hollow structure, with the oil supply pipe 20510 and oil return pipe 20511 all passing through the hollow cavity of the main tray 20512, and the ends of the oil supply hose 20513 and oil return hose 20514, which are wound around the innermost ring of the double-slotted wheel disc 20502, passing through the hollow cavity of the main tray 20512 and connecting to the oil supply pipe 20510 and oil return pipe 20511, respectively.

[0051] A guide wheel 20503 is rotatably mounted on the mounting holder 20501, and the guide wheel 20503 is typically configured in a double-slot configuration to accommodate a double-slot wheel disc 20502, with the oil supply hose 20513 and oil return hose 20514 coming out from it, respectively. Below the guide wheel 20503 is a floating wheel 20504, which is also configured in a double-slot configuration, with the oil supply hose 20513 and oil return hose 20514 both coming out from the guide wheel. The oil cylinder 20409 of the next stage telescopic cylinder is connected via the 20503 and floating wheel 20504. The floating wheel 20504 falls onto the oil supply hose 20513 and oil outlet hose by gravity, suspending the oil supply hose 20513 and oil outlet hose, thereby ensuring stable unwinding and winding of the oil supply hose 20513 and oil return hose 20514, and avoiding the effect of variations in the linear velocity of the oil supply hose 20513 and oil return hose 20514 on the lifting and lowering of the telescopic arm 2 in the double-slotted wheel disc 20502.

[0052] The mounting holder 20501 is provided with a first sensor 20505 and a second sensor 20506. The first sensor 20505 is located below the guide wheel 20503 and above the floating wheel 20504, and the second sensor 20506 is located below the floating wheel 20504. Both the first sensor 20505 and the second sensor 20506 are connected to the fourth power mechanism. The first sensor 20505 detects the upper limit of the floating wheel 20504's position, and the second sensor 20506 detects the lower limit of the floating wheel 20504's position. When the first sensor 20505 detects the floating wheel 20504, the fourth power mechanism starts up, rotating the double-slotted wheel disc 20502 and unwinding the wound-up oil supply hose 20513 and oil return hose 20514. When the second sensor 20506 detects the floating wheel 20504, the fourth power mechanism stops.

[0053] A tension spring 20507 is provided between the floating wheel 20504 and the mounting holder 20501. One end of the tension spring 20507 is fixed to the floating wheel 20504, and the other end is fixed to the mounting holder 20501. This tension spring applies a biasing force to the oil supply hose 20513 and the oil return hose 20514, thereby preventing the floating wheel 20504 from moving too fast or too far upward, which would cause it to deviate from the detection range of the first sensor 20505.

[0054] The fourth power mechanism is, Mounting holder 20501 The main tray 20512 includes a motor 20515 mounted on it, an outerring gear 20517 is fixedly mounted on the main tray 20512, and a transmission shaft 20516 is rotatably mounted on the mounting holder 20501. The transmission shaft 20516 has a drive gear 20518 attached to one end that meshes with the outerring gear 20517, and the other end is traversably connected to the motor 20515. When the transmission shaft 20516 rotates, the main tray 20512 rotates, causing the core cylinder 20508 and the double-slotted wheel disc 20502 to rotate together, thereby unwinding and winding the oil supply hose 20513 and the oil return hose 20514. The motor 20515 and the transmission shaft 20516 are traversably connected via a chain, although belt transmission and gear transmission are also possible and can be configured according to the space as those skilled in the art will know, so they will not be described in detail here.

[0055] Of course, in order to simplify the structure, the oil pipe feeding device 205 may employ a different technical design. Specifically, the oil pipe feeding device 205 may include a wheel disc driven by a torque motor or servo motor, and the oil pipe may be wound around the wheel disc and fed in stages.

[0056] As shown in Figure 17, each hydraulic outrigger includes a vertical oil cylinder 33 and a horizontal oil cylinder 32, which are positioned so that their axes are perpendicular. The cylinder block of the vertical oil cylinder 33 is attached to the piston rod of the horizontal oil cylinder 32. The rodless chamber of the horizontal oil cylinder 32 communicates with oil port A of the first directional control valve 36, and the rod chamber of the horizontal oil cylinder 32 communicates with oil port B of the first directional control valve 36. The oil port is connected to the oil supply line 34, the T oil port of the first directional control valve 36 is connected to the oil return line 35, the rodless chamber of the vertical oil cylinder 33 is connected to the A oil port of the second directional control valve 37 via the first pilot check valve 38, the rod chamber of the vertical oil cylinder 33 is connected to the B oil port of the second directional control valve 37 via the second pilot check valve 39, the pilot line of the second pilot check valve 39 is connected to the A oil port of the second directional control valve 37, and the first pilot check The pilot line of valve 38 communicates with the B oil port of the second directional control valve 37. The first pilot check valve 38 and the second pilot check valve 39 maintain the current pressure of the longitudinal oil cylinder 33, prevent leakage of hydraulic fluid due to load changes, and stabilize the output of the piston rod of the longitudinal oil cylinder 33. The second directional control valve 37 is connected to the tilt sensor 40. The P oil port of the second directional control valve 37 communicates with the oil supply line 34, and the T oil port of the second directional control valve 37 communicates with the oil return line. Communicating with 35, the first directional control valve 36 is an O-type 4-port 3-position electromagnetic directional control valve, and the second directional control valve 37 is a Y-type 4-port 3-position electromagnetic directional control valve. Specifically, the electromagnetic coil of the second directional control valve 37 is connected to a tilt sensor 40, which is usually attached to the telescopic arm 2 and detects whether the telescopic arm 2 is perpendicular to the ground during raising and lowering. The tilt sensor 40 is a device known to those skilled in the art and may be purchased and installed according to the desired model number. When in use, the tilt sensor 40 feeds back the detection signal to a control unit, usually a PLC or microcontroller, which then controls the corresponding directional control valve to control the corresponding hydraulic actuator.During operation, the rodless chamber of the horizontal oil cylinder 32 is lubricated, the horizontal oil cylinder 32 moves the vertical oil cylinder 33 horizontally, and when the horizontal oil cylinder 32 extends to its maximum position, the first directional control valve 36 is locked, and the O-type 4-port 3-position solenoid directional control valve switches to the intermediate position, thereby maintaining the current state of the horizontal oil cylinder 32 and preventing lubrication of the rodless chamber of the vertical oil cylinder 33. At the same time, the hydraulic fluid opens the second pilot check valve 39, allowing the hydraulic fluid in the rod chamber of the vertical oil cylinder 33 to return to the oil return line 35, and the vehicle chassis 1 is supported and lifted to the appropriate position. Once all four corners are level, the Y-type 4-port 3-position electromagnetic directional control valve switches to the intermediate position, stopping the supply of oil to the rod chamber of the longitudinal oil cylinder 33. The longitudinal oil cylinder 33 maintains its current position due to the action of the first pilot check valve 38 and the second pilot check valve 39. If a corner of the vehicle chassis 1 tilts due to excessive load, the tilt sensor 40 conducts to the electromagnetic coil of the second directional control valve 37, preventing the supply of oil to the rodless chamber of the longitudinal oil cylinder 33. The piston rod of the longitudinal oil cylinder 33 extends to compensate for the tilt, and when the tilt sensor 40 becomes level, the longitudinal oil cylinder 33 maintains that position.

[0057] It is known that the larger the support area of ​​the vehicle chassis 1, the higher the stability of the vehicle chassis 1, and consequently, the greater the stability of the telescopic arm 2. Therefore, the horizontal oil cylinder 32 is configured as a two-stage hydraulic oil cylinder, thereby increasing the horizontal extension length of the hydraulic outrigger.Specifically, as shown in Figure 18, the horizontal oil cylinder 32 includes a first cylinder block 3201 mounted in a predetermined position, a second cylinder block 3202 slidably mounted within the first cylinder block 3201, a third cylinder block 3203 slidably mounted within the second cylinder block 3202, the third cylinder block 3203 corresponds to the piston rod of the horizontal oil cylinder 32, and to avoid leakage of hydraulic fluid, sliding sealing mechanisms are provided both between the second cylinder block 3202 and the first cylinder block 3201 and between the second cylinder block 3202 and the third cylinder block 3203, the end of the third cylinder block 3203 is connected to the vertical oil cylinder 33, the first cylinder block 3201 and the second cylinder block 3202 are in communication with each other, and a plunger 3204, which is slidably mounted within the second cylinder block 3202, is fixedly mounted to the end of the third cylinder block 3203, and the third cylinder block A third central cylinder 3207 is provided inside cylinder 3203, and an oil passage port 3208 is provided at the end of the third central cylinder 3207 away from the plunger 3204, the other end of the third central cylinder 3207 enters the second cylinder block 3202 through the plunger 3204, the second central cylinder 3206 is fitted inside the third central cylinder 3207, the second central cylinder 3206 fits into the second cylinder block 3202, the first central cylinder 3205 is fitted inside the second central cylinder 3206, the first central cylinder 3205 fits into the first cylinder block 3201, and the first central The end of the core cylinder 3205 is connected to the first horizontal hydraulic oil port 3209 at the end of the first cylinder block 3201, and the first horizontal hydraulic oil port 3209 communicates with the oil inlet 3208. The end of the first cylinder block 3201 is provided with a second horizontal hydraulic oil port 3210, which communicates with the cavity of the first cylinder block 3201, and the second horizontal hydraulic oil port 3210 communicates with oil inlet A of the first directional control valve 36. The first horizontal hydraulic oil port 3209 communicates with oil inlet B of the first directional control valve 36.When the second horizontal hydraulic oil port 3210 is supplied with hydraulic oil, the hydraulic oil in the supply line 34 enters the first cylinder block 3201, first pushing the plunger 3204 to extend the third cylinder block 3203 and move the vertical oil cylinder 33 horizontally. The hydraulic oil in the third cylinder block 3203 returns to the oil return line 35 through the oil inlet 3208. Once the third cylinder block 3203 is fully extended, the supply of hydraulic oil to the first cylinder block 3201 continues, and the second cylinder block 3202 continues to extend outward, while the vertical oil cylinder 33 continues to move horizontally. A horizontal oil cylinder 32 with this structure increases the horizontal travel distance of the vertical oil cylinder 33, increases the support area, and further improves support stability.

[0058] Within the third cylinder block 3203, a first casing 3301 and a second casing 3302 are arranged in parallel. The first casing 3301 has one end connected to a first pilot check valve 38 and the other end extending into the second cylinder block 3202 through a plunger 3204. The second casing 3302 has one end connected to a second pilot check valve 39 and the other end extending into the second cylinder block 3202 through a plunger 3204. The third casing 3303 is fitted into the first casing 3301, and the fourth casing 3304 is fitted into the second casing 3302. Both the third casing 3303 and the fourth casing 3304 fit into the second cylinder block 3202, and the fifth casing 3305 is fitted into the third casing 3303. The sixth casing 3306 is fitted into the fourth casing 3304, and both the fifth casing 3305 and the sixth casing 3306 fit into the first cylinder block 3201. To avoid leakage of hydraulic fluid, slide sealing structures are provided both between the first casing 3301 and the third casing 3303 and between the third casing 3303 and the second casing 3302. Similarly, to avoid leakage of hydraulic fluid, slide sealing structures are provided both between the second casing 3302 and the fourth casing 3304 and between the fourth casing 3304 and the sixth casing 3306. The end of the fifth casing 3305 is connected to oil port A of the second directional control valve 37, and the end of the sixth casing 3306 is connected to oil port B of the second directional control valve 37. This structure makes full use of the internal space of the horizontal oil cylinder 32, and incorporates the oil supply line and oil return line 35 for the vertical oil cylinder 33, eliminating the need to install multiple external hydraulic oil pipes. As a result, the structure is simple and practical.

[0059] When in use, once the vehicle has loaded the telescopic arm 2 and reached the designated position, the front hydraulic outrigger 4 and the transition hydraulic oil cylinder 7 extend, stably supporting the vehicle chassis 1. The reversing hydraulic oil cylinder 5 then begins to extend, pushing and reversing the telescopic arm 2 until it is in a vertical position, that is, when the telescopic arm 2 is perpendicular to the ground, the rear hydraulic outrigger 6 extends and supports the ground. At this time, the transition hydraulic oil cylinder 7 retracts, and the vehicle and telescopic arm 2 are supported on the ground by the front hydraulic outrigger 4 and the rear hydraulic outrigger 6. At this point, the telescopic arm 2 can be raised and operated. This structure has a large support area, a low center of gravity for the telescopic arm 2, and high stability. If it is necessary to adjust the verticality of the telescopic arm 2, the transition hydraulic oil cylinder 7 extends and works in cooperation with the rear hydraulic outrigger 6 on the telescopic arm 2 to compensate for the tilt angle of the telescopic arm 2. The transition hydraulic oil cylinder 7 and the rear hydraulic outrigger 6 are close to the telescopic arm 2 and easy to adjust, so in this case, their coordinated action is necessary. The telescopic arm 2 is reversed until it is in a vertical position, and under the power of the hoist, the second fixed holder 20 is gradually pulled toward the first fixed holder 9 around the hinge connecting shaft 22. When the second fixed holder 20 is coupled to the first fixed holder 9, the third power mechanism pushes the positioning pin 23 to connect the first fixed holder 9 and the second fixed holder 20 as a single unit. Depending on the distance to the person to be rescued, the second slide holder 21 is extended, and the first slide holder is also extended, and the balance of the work bucket 3 is adjusted using the counterweight 11, thereby ensuring a successful rescue. When the telescopic arm 2 is lifted, the lifting wire rope 20404 is sequentially wrapped around and secured, the piston rod of the lift hydraulic oil cylinder 20409 of the final stage telescopic cylinder 203 extends, and the lightest innermost telescopic section 20403 within the final stage telescopic cylinder 203 is lifted first. Once the lifting is complete for each telescopic section, the lift hydraulic oil cylinder 20409 of the next final stage telescopic cylinder begins to lift, and so on, lifting is performed section by section until the telescopic arm 2 reaches the desired height.During descent, the piston rod of the lift hydraulic oil cylinder 20409 of the first stage telescopic tube 201 is retracted, the lightest second outer telescopic section 20402 is lowered first, and the descent is completed for each telescopic section. Then, the piston rod of the lift hydraulic oil cylinder 20409 of the second stage telescopic tube 202 is retracted, the second stage telescopic tube 202 is lowered, and this continues until the final stage telescopic tube 203 is lowered. The outermost extension section 20401 of the first stage telescopic cylinder 201 is located on the ground, and the pressurized oil for the lift hydraulic oil cylinder 20409 of the first stage telescopic cylinder 201 is directly supplied from the oil supply line 34 and the oil return line 35. The lift hydraulic oil cylinder 20409 of the second stage telescopic cylinder 202 is installed inside the innermost extension section 20403 of the first stage telescopic cylinder 201. At this time, an oil pipe feeder 205 needs to be installed at the bottom of the outermost extension section 20401 of the first stage telescopic cylinder 201 in order to supply oil to the lift hydraulic oil cylinder 20409 of the second stage telescopic cylinder 202, and similarly, an oil pipe feeder is installed inside the innermost extension section 20403 of the first stage telescopic cylinder 201. A feeder 205 is provided to supply oil to the lift hydraulic oil cylinder 20409 of the third telescopic cylinder, and in this way, an oil pipe feeder 205 is provided in the innermost telescopic section 20403 of the preceding telescopic cylinder to supply oil to the lift hydraulic oil cylinder 20409 of the next telescopic cylinder, and in this way, oil is supplied to the lift hydraulic oil cylinder 20409 of the final telescopic cylinder. The hydraulic fluid from the preceding telescopic cylinder supplies oil to the lift hydraulic oil cylinder 20409 of the next telescopic cylinder and also supplies oil to the oil pipe feeder 205 inside the next telescopic cylinder, and in this way, power from the hydraulic fluid is continuously output in accordance with the raising and lowering of the telescopic arm 2.

[0060] In this embodiment of the present invention, the telescopic arm 2 is hinged to the end of the vehicle chassis 1. During operation, the reversing hydraulic oil cylinder 5 reverses the telescopic arm 2 until it is in a vertical position, bringing the bottom of the telescopic arm 2 close to the ground. Compared to the conventional structure in which the articulated arm is located above the vehicle chassis 1, this lowers the center of gravity of the telescopic arm 2 and improves its stability.

[0061] The vertically adjustable and integrated telescopic structure significantly reduces the vehicle's length, resulting in a vehicle that is 15.3m long, 2.5m wide, and 4m high, with a maximum rescue height of 144m and a maximum rescue radius of 15m at that height, as well as a reduced turning radius. Compared to fire trucks of the same rescue height, this invention offers broader applicability and greater flexibility, and in particular, within the 144m height range, there are no blind spots in rescue operations, and a rescue radius of 15m can be maintained across a height of 144m, allowing a single fire truck to handle all rescue operations in high-rise buildings.

[0062] Although the present invention has been described in detail using the general description and specific examples above, it will be obvious to those skilled in the art that several modifications or improvements may be made based on the present invention. Accordingly, any such modifications or improvements made without departing from the spirit of the present invention will fall within the scope of the claims of the present invention.

Claims

1. A multi-stage hydraulic pulley vertical lifting climbing platform fire truck including a vehicle chassis, A multi-stage hydraulic multiplier pulley vertical lifting climbing platform fire truck is characterized in that a telescopic arm is attached to the rear of the vehicle chassis by hinge connection, a slewing platform is provided at the tip of the telescopic arm, a work arm is attached to the slewing platform, a work bucket is attached to one end of the work arm, a reversing hydraulic oil cylinder is attached to the vehicle chassis, one end of the reversing hydraulic oil cylinder is attached to the vehicle chassis by hinge connection, and the other end is attached to the telescopic arm by hinge connection, front hydraulic outriggers are attached to the left and right sides of the vehicle chassis at a position close to the driver's cab of the vehicle, rear hydraulic outriggers are attached to the left and right sides of the telescopic arm at a position away from the driver's cab of the vehicle, an auxiliary support oil cylinder is provided on the vehicle chassis, the extension direction of the piston rod of the auxiliary support oil cylinder is vertically upward, and transition hydraulic oil cylinders are attached to the left and right sides at the end of the vehicle chassis.

2. The multi-stage hydraulic multiplier pulley vertical lifting climbing platform fire truck according to claim 1, characterized in that the work arm includes a first fixed holder, the first fixed holder has one end connected to a second fixed holder and the other end being a first open portion, a first slide holder driven by a first power mechanism is slidably mounted inside the first fixed holder, a counterweight is attached to the end of the first slide holder extending from the first open portion, a second open portion is provided at the end of the second fixed holder away from the first fixed holder, a second slide holder driven by a second power mechanism is slidably mounted inside the second fixed holder, and the work bucket is attached to the end of the second slide holder extending from the second open portion.

3. The multi-stage hydraulic multiplier pulley vertical lifting climbing platform fire truck according to claim 2, characterized in that the second fixed holder is attached to the first fixed holder by hinge connection via a hinge connecting shaft, and a positioning pin driven by a third power mechanism is provided between the second fixed holder and the first fixed holder.

4. The multi-stage hydraulic multiplier pulley vertical lifting climbing platform fire truck according to claim 3, characterized in that a support arm is fixedly attached to the end of the first fixed holder near the second fixed holder, a support rope pulley is rotatably attached to the support arm, a hoist mechanism is provided near the first open portion of the first fixed holder, a lifting arm is provided on the second fixed holder, a lifting wire rope is provided between the hoist mechanism, the support rope pulley, and the lifting arm, and the end of the lifting arm away from the lifting point of the lifting wire rope is attached to the second fixed holder by a hinge connection.

5. The multi-stage hydraulic multiplier pulley vertical lifting climbing platform fire truck according to claim 4, characterized in that the second fixed holder is provided with a first limiting block for limiting the position of the lifting arm in the vertical direction, and the second fixed holder is provided with a second limiting block for limiting the lifting point of the lifting arm to be lower than the outer plane of the second fixed holder.

6. The telescopic arm includes a plurality of sequentially fitted telescopic cylinders, each of which includes a plurality of integrally fitted telescopic sections, each of which is connected to a wire rope hydraulic lift device, the wire rope hydraulic lift device of the first telescopic cylinder is provided in the outermost telescopic section, the wire rope hydraulic lift device of the next telescopic cylinder is provided in the innermost telescopic section of the preceding telescopic cylinder, the wire rope hydraulic lift device includes a lift hydraulic oil cylinder, the cylinder block of the lift hydraulic oil cylinder is fixedly attached to the bottom of the corresponding telescopic section, a group of fixed pulleys is attached to the cylinder block of the lift hydraulic oil cylinder, and a group of movable pulleys is attached to the piston rod of the lift hydraulic oil cylinder. A multi-stage hydraulic multiplier pulley vertical lifting climbing platform fire truck according to claim 1, characterized in that a lift wire rope is provided between the lift hydraulic oil cylinder and the corresponding telescopic section, one end of the lift wire rope is fixed, and the other end is fixed to the innermost telescopic section of the telescopic cylinder of the stage via a group of movable pulleys and a group of fixed pulleys, the outermost telescopic section of the next stage telescopic cylinder is fitted onto the innermost telescopic section of the previous stage telescopic cylinder, an oil pipe supply device for supplying oil to the next stage telescopic cylinder is installed inside the innermost telescopic section of the previous stage telescopic cylinder, the work bucket is attached to the top of the innermost telescopic section of the final stage telescopic cylinder, and the rear hydraulic outrigger is attached to the outer surface of the outermost telescopic section of the first stage telescopic cylinder.

7. The multi-stage hydraulic multiplier pulley vertical lifting climbing platform fire truck according to claim 6, characterized in that sub-rope pulleys for distributing the lift wire ropes of the corresponding fixed pulley group to the corresponding positions are attached to the bottom of both the outermost telescopic section of the first stage telescopic cylinder and the innermost telescopic section of the preceding stage telescopic cylinder.

8. The multi-stage hydraulic pulley vertical lifting climbing platform fire truck according to claim 7, characterized in that a wall-penetrating wheel is attached to the bottom of any of the telescopic sections other than the outermost telescopic section of the first stage telescopic cylinder, a bottom steering wheel is attached to the inner bottom of either the outermost telescopic section of the first stage telescopic cylinder or the innermost telescopic section of the previous stage telescopic cylinder, and a top steering wheel is attached to any of the inner tops of any of the telescopic sections other than the innermost telescopic section of the final stage telescopic cylinder.

9. The multi-stage hydraulic multiplier pulley vertical lifting climbing platform fire truck according to claim 8, characterized in that the wall-penetrating wheel penetrates the corresponding telescopic section, and the lifting wire rope is wrapped at least twice around the wall-penetrating wheel from the outside of the corresponding telescopic section and enters the inside of the telescopic section.

10. The multi-stage hydraulic multiplier pulley vertical lifting climbing platform fire truck according to claim 9, characterized in that the lifting wire ropes of each stage of the telescopic tube are wound around corresponding movable pulley groups and fixed pulley groups, then around corresponding sub-rope pulleys, bottom steering wheel, outermost top steering wheel, wall-penetrating wheels of the telescopic sections of adjacent stages, and finally fixed in a position above the wall-penetrating wheel of the innermost telescopic section.

11. A swing arm is provided between two adjacent telescopic sections, one end of the swing arm is attached to the outer telescopic section by a hinge connection, the other end of which is provided with an inclined guide surface, a roller is provided at the end of the swing arm closest to the inclined guide surface, an adjustment screw is screwed into the flange at the tip of the outer telescopic section, the end of the adjustment screw abuts against the inclined guide surface, and the outer edge of the roller abuts against the outer surface of the inner telescopic section due to the action of the adjustment screw, characterized in that a multi-stage hydraulic multiplier pulley vertical lifting climbing platform fire truck is provided according to claim 10.

12. The oil pipe feeding device includes a mounting holder, the mounting holder is rotatably mounted on which a core cylinder driven by a fourth power mechanism is provided, a separator is provided inside the core cylinder, the separator divides the cavity of the core cylinder into an oil supply cavity and a return oil cavity, an oil supply pipe communicating with the oil supply cavity is fixedly attached to the core cylinder, an oil return pipe communicating with the return oil cavity is fixedly attached to the core cylinder, the oil supply cavity is connected to an oil supply pipeline via a rotary joint, and the return oil cavity is connected to an oil return pipe via another rotary joint A multi-stage hydraulic multiplier pulley vertical lifting climbing platform fire truck according to any one of claims 6 to 11, characterized in that it is connected to a road, a main body tray is fixedly attached to the outer surface of the core cylindrical body, a double-slotted wheel disc is fixedly attached to the main body tray, the core cylindrical body, the main body tray, and the double-slotted wheel disc are arranged coaxially, a fuel supply hose and an oil return hose are wound around the double-slotted wheel disc, one end of the fuel supply hose is connected to the fuel supply pipe, and one end of the oil return hose is connected to the oil return pipe.

13. A multi-stage hydraulic multiplier pulley vertical lifting climbing platform fire truck according to claim 12, characterized in that a guide wheel is rotatably mounted on the mounting holder, a floating wheel is provided below the guide wheel, and the oil supply hose and oil return hose are both wrapped around the guide wheel and floating wheel and connected to the lift hydraulic oil cylinder of the next stage telescopic cylinder.

14. The mounting holder is provided with a first sensor and a second sensor, 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 fourth power mechanism, characterized in that the multi-stage hydraulic multiplier pulley vertical lifting climbing platform fire truck according to claim 13.

15. The multi-stage hydraulic multiplier pulley vertical lifting climbing platform fire truck according to claim 14, characterized in that a tension spring is provided between the floating wheel and the mounting holder, with one end of the tension spring fixed to the floating wheel and the other end fixed to the mounting holder.

16. The multi-stage hydraulic multiplier pulley vertical lifting climbing platform fire truck according to claim 15, characterized in that the fourth power mechanism includes a motor mounted on the mounting holder, an outerring gear is fixedly mounted on the main tray, a transmission shaft is rotatably mounted on the mounting holder, the transmission shaft has a drive gear that meshes with the outerring gear attached to one end and the other end is connected to the motor in a power-transmitting manner.

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