CN113682983B

CN113682983B - Flexible arm stabilizing system of climbing platform fire truck

Info

Publication number: CN113682983B
Application number: CN202111052765.6A
Authority: CN
Inventors: 李祥啟; 李文明
Original assignee: Dayang Parking Co Ltd
Current assignee: Dayang Parking Co Ltd
Priority date: 2021-09-09
Filing date: 2021-09-09
Publication date: 2023-05-23
Anticipated expiration: 2041-09-09
Also published as: CN113682983A

Abstract

The embodiment of the invention discloses a telescopic arm stabilizing system of a climbing platform fire truck, which belongs to the technical field of fire fighting and rescue equipment and comprises a plurality of telescopic joints sleeved together, wherein flanges are arranged at the top ends of each telescopic joint, a swinging arm is arranged between every two adjacent telescopic joints, one end of the swinging arm is hinged and installed on an outer telescopic joint, an inclined guide surface is arranged at the other end of the swinging arm, a roller is arranged at one end, close to the inclined guide surface, of the swinging arm, an adjusting screw is connected with the flange at the top end of the outer telescopic joint in a threaded manner, the end part of the adjusting screw is propped against the inclined guide surface, and the outer edge of the roller is propped against the outer surface of the inner telescopic joint. The telescopic arm solves the technical problems that the maximum rescue Gao Duyuan of the telescopic arm of the existing telescopic cylinder structure is far smaller than the telescopic length of the telescopic arm and the stability is poor, and is widely applied to high-altitude fire fighting or rescue.

Description

Flexible arm stabilizing system of climbing platform fire truck

Technical Field

The embodiment of the invention relates to the technical field of fire-fighting and rescue equipment, in particular to a telescopic boom stabilizing system of a climbing platform fire truck.

Background

At present, the telescopic boom of the high-altitude fire-fighting rescue vehicle usually has two forms, one is a crank structure, the other is a telescopic cylinder structure, the crank structure has few sections, the telescopic cylinder structure has many sections, and in the telescopic boom of the existing telescopic cylinder structure, the sliding clearance between the telescopic joints is larger, so that the telescopic joints are seriously rocked after extending, the telescopic boom is inclined and lifted, the dead weight of the telescopic boom is utilized to overcome the sliding clearance between the telescopic joints, the maximum rescue Gao Duyuan of the telescopic boom of the telescopic cylinder structure is far smaller than the telescopic length of the telescopic boom, the stability is poor, and the advantages of the telescopic boom of the telescopic cylinder structure are difficult to develop.

Therefore, in the technical field of fire-fighting and rescue equipment, there is still a need for research and improvement on the telescopic boom stabilizing system of the fire-fighting truck on a climbing platform, which is also a research hotspot and key point in the technical field of fire-fighting and rescue equipment at present, and is a starting point for completing the invention.

Disclosure of Invention

Therefore, the embodiment of the invention provides a telescopic boom stabilizing system of a climbing platform fire truck, which aims to solve the technical problems that the maximum rescue Gao Duyuan of a telescopic boom of the existing telescopic barrel structure is far smaller than the telescopic length of the telescopic boom and the stability is poor.

In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:

according to the embodiment of the invention, the telescopic boom stabilizing system of the elevating platform fire truck is provided, the telescopic boom stabilizing system comprises telescopic booms arranged on an automobile chassis, hydraulic support legs are arranged on the automobile chassis and the telescopic booms, each hydraulic support leg comprises a vertical oil cylinder and a horizontal oil cylinder, the axes of the vertical oil cylinders are vertically arranged, the cylinder bodies of the vertical oil cylinders are arranged on the piston rods of the horizontal oil cylinders, each telescopic boom comprises a plurality of telescopic joints sleeved together, the top end of each telescopic joint is provided with a flange, an inner telescopic joint penetrates through the flange at the top end of an outer telescopic joint, a swinging arm is arranged between every two adjacent telescopic joints, one end of each swinging arm is hinged to the outer telescopic joint, an inclined guide surface is arranged at the other end of each swinging arm, a roller is arranged at one end, close to the inclined guide surface, of each flange at the top end of the outer telescopic joint is in threaded connection with an adjusting screw, and the end of each adjusting screw is propped against the inclined guide surface.

Further, the section shape of the telescopic joint is square, each panel of the inner telescopic joint is at least propped against two groups of rollers arranged at intervals, and the rollers are respectively positioned at the corner positions of the corresponding telescopic joint.

Further, a lock nut is arranged between the adjusting screw and the flange.

Further, an inner limiting block is arranged on the outer surface of the bottom of the inner expansion joint, and an outer limiting block is arranged on the inner surface of the top of the outer expansion joint correspondingly.

Further, the upper surfaces of all the inner limiting blocks are positioned on the same horizontal plane, and the lower surfaces of all the outer limiting blocks are positioned on the same horizontal plane.

Further, the rodless cavity of the horizontal oil cylinder is communicated with the A oil port of the first reversing valve, the rod cavity of the horizontal oil cylinder is communicated with the B oil port of the first reversing valve, the P oil port of the first reversing valve is communicated with the oil inlet pipeline, the T oil port of the first reversing valve is communicated with the oil return pipeline, the rodless cavity of the vertical oil cylinder is connected with the A oil port of the second reversing valve through the first hydraulic control one-way valve, the rod cavity of the vertical oil cylinder is connected with the B oil port of the second reversing valve through the second hydraulic control one-way valve, the hydraulic control port of the first hydraulic control one-way valve is connected with the B oil port of the second reversing valve, the P oil port of the second reversing valve is communicated with the oil inlet pipeline, the T oil port of the second reversing valve is communicated with the oil return pipeline, and the second reversing valve is connected with the inclination sensor.

Further, the first reversing valve is an O-shaped three-position four-way electromagnetic reversing valve, the second reversing valve is a Y-shaped three-position four-way electromagnetic reversing valve, and an electromagnetic coil of the second reversing valve is connected with the inclination sensor.

Further, the horizontal cylinder comprises a first cylinder body arranged at a fixed position, a second cylinder body is slidably arranged in the first cylinder body, a third cylinder body is slidably arranged in the second cylinder body, the end part of the third cylinder body is connected with the vertical cylinder, the first cylinder body is communicated with the second cylinder body, the end part of the third cylinder body is fixedly provided with a plunger piston which is slidably arranged in the second cylinder body, a third central cylinder is arranged in the third cylinder body, one end of the third central cylinder, which is far away from the plunger piston, is provided with an oil inlet, the other end of the third central cylinder penetrates through the plunger piston and stretches into the second cylinder body, only a second central cylinder is sleeved in the third central cylinder, the second central cylinder is matched with the second cylinder body, a first central cylinder is sleeved in the second central cylinder body, the end part of the first central cylinder body is matched with the first cylinder body, the end part of the first central cylinder body is connected with a horizontal first working oil inlet, the end part of the first cylinder body is provided with a horizontal second working oil inlet, the other end part of the third central cylinder body is provided with a horizontal working oil inlet, the other end of the third central cylinder penetrates through the plunger piston into the second cylinder, and the second working oil inlet is communicated with the horizontal reversing valve A.

Further, a first sleeve and a second sleeve are arranged in the third cylinder body in parallel, one end of the first sleeve is connected with the first hydraulic control one-way valve, the other end of the first sleeve penetrates through the plunger to extend into the second cylinder body, one end of the second sleeve is connected with the second hydraulic control one-way valve, the other end of the second sleeve penetrates through the plunger to extend into the second cylinder body, a third sleeve is sleeved in the first sleeve, a fourth sleeve is sleeved in the second sleeve, both the third sleeve and the fourth sleeve are matched with the second cylinder body, a fifth sleeve is sleeved in the third sleeve, a sixth sleeve is sleeved in the fourth sleeve, both the fifth sleeve and the sixth sleeve are matched with the first cylinder body, the end part of the fifth sleeve is connected with an A oil port of the second reversing valve, and the end part of the sixth sleeve is connected with a B oil port of the second reversing valve.

The embodiment of the invention has the following advantages:

(1) According to the embodiment of the invention, the swing arm is arranged at the position, close to the flange, of the outer telescopic joint, the roller is arranged on the swing arm, the outer edge of the roller is propped against the outer surface of the inner telescopic joint through the adjusting screw, so that the sliding gap between adjacent telescopic joints is reduced, the stability of the telescopic arm in the telescopic process is improved, the structure can use vertical lifting, and the maximum rescue height of the telescopic arm is equal to the telescopic length of the telescopic arm.

(2) The inner limiting block and the outer limiting block which are corresponding in position are arranged, so that the inner-layer telescopic joint is firmer in the telescopic process, the limiting function of the maximum rising position of the inner-layer telescopic joint is achieved, the inner-layer telescopic joint is prevented from falling off, and on the other hand, after the inner limiting block and the outer limiting block are contacted, the coaxiality of the inner-layer telescopic joint and the outer-layer telescopic joint is consistent, the perpendicularity of the telescopic joint during normal operation is guaranteed, and the usability of the telescopic joint is further enhanced.

(3) The invention is provided with the first hydraulic control one-way valve and the second hydraulic control one-way valve, so that the current pressure of the vertical oil cylinder can be maintained, the hydraulic oil leakage caused by bearing change is avoided, the output quantity of a piston rod of the vertical oil cylinder is stabilized, and the change of the inclination angle of the chassis can be monitored at any time and the chassis level can be adjusted in time due to the fact that the second reversing valve is connected with the inclination angle sensor, so that the telescopic boom always keeps in a vertical state, the stability of the telescopic boom is ensured, and the smooth implementation of fire rescue is ensured.

(4) Because the horizontal oil cylinder is set as the secondary oil cylinder, the horizontal movement distance of the vertical oil cylinder is increased by the horizontal oil cylinder with the structure, the supporting area is increased, the supporting stability is further improved, and the stable supporting performance of the telescopic arm is further improved.

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 will be apparent to those of ordinary skill in the art that the drawings in the following description are exemplary only and that other implementations can be obtained from the extensions of the drawings provided without inventive effort.

The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the invention, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present invention, should fall within the ambit of the technical disclosure.

FIG. 1 is a schematic diagram of an embodiment of the present invention;

FIG. 2 is a schematic view of a connection structure of two adjacent expansion joints according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of the structure of E-E in FIG. 2;

FIG. 4 is an enlarged schematic view of the structure of FIG. 2A;

FIG. 5 is a hydraulic schematic of a hydraulic leg in an embodiment of the invention;

FIG. 6 is a schematic view of the structure of a hydraulic leg in an embodiment of the invention;

in the figure: 1. the hydraulic support comprises an automobile chassis, 2, a telescopic arm, 3, a hydraulic support leg, 4, an outer telescopic joint, 401, a flange, 5, an inner telescopic joint, 6, a swinging arm, 601, an inclined guide surface, 7, a screw, 8, a locking nut, 9, an inner limiting block, 10, a roller, 11, a horizontal oil cylinder, 1101, a first cylinder body, 1102, a second cylinder body, 1103, a third cylinder body, 1104, a plunger, 1105, a first central cylinder, 1106, a second central cylinder, 1107, a third central cylinder, 1108, an oil through port, 1109, a horizontal first working port, 1110, a horizontal second working port, 12, a vertical oil cylinder, 1201, a first sleeve, 1202, a second sleeve, 1203, a third sleeve, 1204, a fourth sleeve, 1205, a fifth sleeve, 1206, a sixth sleeve, 13, an oil inlet pipeline, 14, an oil return pipeline, 15, a first reversing valve, 16, a second reversing valve, 17, a first hydraulic control one-way valve, 18, a second hydraulic control one-way valve, 19, an inclination sensor, 20 and an outer limiting block.

Detailed Description

Other advantages and advantages of the present invention will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The terms such as "front", "rear", "left", "right", "middle" and the like are also used in the present specification for convenience of description, but are not intended to limit the scope of the present invention, and the changes or modifications of the relative relationship thereof are considered to be within the scope of the present invention without substantial modification of the technical content.

As shown in fig. 1, the embodiment of the invention provides a telescopic boom stabilizing system of a fire truck with a climbing platform, which comprises a telescopic boom 2 arranged on an automobile chassis 1, wherein hydraulic support legs 3 are arranged on the automobile chassis 1 and the telescopic boom 2, each hydraulic support leg 3 comprises a vertical cylinder 12 and a horizontal cylinder 11, the axes of which are vertically arranged, a cylinder body of each vertical cylinder 12 is arranged on a piston rod of each horizontal cylinder 11, as shown in fig. 2, fig. 3 and fig. 4, each telescopic boom 2 comprises a plurality of telescopic joints sleeved together, the top end of each telescopic joint is provided with a flange 401, an inner layer telescopic joint 5 penetrates through a flange 401 at the top end of an outer layer telescopic joint 4, a gap between a flange hole at the top end of the outer layer telescopic joint 4 and the outer surface of the inner layer telescopic joint 5 is a sliding gap, a swinging arm 6 is arranged between two adjacent telescopic joints, one end of each swinging arm 6 is hinged to the telescopic joint at the outer layer, the other end of each swinging arm 6 is provided with an inclined guide surface 601, an included angle between the inclined guide surface 601 and a symmetrical center surface of each swinging arm 6 is an acute angle, one end of each swinging arm 6 is provided with a roller 10, the rotating center of each swinging arm 6 is close to the inclined guide surface 10 is arranged on the outer layer of the telescopic joint, the rotating center of each swinging joint is parallel to the outer layer 4 is parallel to the outer layer 7, and the outer layer is in the gap 7 is more stable, and is in the gap 7 is in the process is in the gap between the adjacent layer 5, and is in the gap between the expansion joint is in the expansion joint is adjusted.

The cross section shape of telescopic joint is square, and every telescopic joint is four square boards and encloses into square tubular structure, and the telescopic joint of square cross section has avoided the flexible in-process to take place to rotate, has improved telescopic joint's steadiness ability.

At least two groups of rollers 10 are arranged at intervals on each panel of the inner-layer telescopic joint 5, and the rollers 10 are respectively positioned at the corner positions of the corresponding telescopic joints. If the panel breadth is great, can set up more multiunit gyro wheel 10, telescopic joint's bight position and intermediate position can all set up corresponding gyro wheel 10 to guarantee that inlayer telescopic joint 5 flexible in-process is more firm.

And a lock nut 8 is arranged between the adjusting screw 7 and the flange 401, when the outer edge of the roller 10 is propped against the outer surface of the inner telescopic joint 5, the lock nut 8 is screwed, so that the end face of the lock nut 8 is propped against the end face of the flange 401, and the condition that the adjusting screw 7 is loose in the telescopic joint stretching process, so that the inner telescopic joint 5 generates an excessive shaking gap is avoided.

An inner limiting block 9 used for limiting a sliding gap is arranged between two adjacent telescopic joints, and the gap between the inner limiting block 9 and the inner surface of the outer telescopic joint 4 is required to be adjusted to be smaller than the sliding gap, so that the inner telescopic joint 5 is more stable in the telescopic process.

The outer surface of the bottom of the inner layer expansion joint 5 is provided with an inner limiting block 9, the gap between the inner limiting block 9 and the inner surface of the outer layer expansion joint 4 is required to be adjusted to be smaller than the sliding gap, the inner surface of the top of the outer layer expansion joint 4 is correspondingly provided with an outer limiting block 20, and likewise, the gap between the inner limiting block 9 and the inner surface of the outer layer expansion joint 4 is required to be adjusted to be smaller than the sliding gap, so that the inner layer expansion joint 5 is more stable in the expansion process. The inner limiting block 9 and the outer limiting block 20 are at least arranged on each panel of the inner layer telescopic joint 5, and a person skilled in the art can select the number of the inner limiting block 9 and the outer limiting block 20 to be used on each panel according to the size of the panel of the telescopic joint, and arrange the installation positions of the inner limiting block 9 and the outer limiting block 20, which are not repeated herein. The upper surfaces of all the inner limiting blocks 9 are positioned on the same horizontal plane, and the lower surfaces of all the outer limiting blocks 20 are positioned on the same horizontal plane, so that after the inner limiting blocks 9 and the outer limiting blocks 20 are contacted, the coaxiality of the inner layer expansion joint 5 and the outer layer expansion joint 4 is consistent, the verticality of the expansion joint during normal operation is ensured, and the use performance of the telescopic joint is further enhanced.

According to the embodiment of the invention, the swing arm 6 is arranged at the position, close to the flange 401, of the outer-layer telescopic joint 4, the roller 10 is arranged on the swing arm 6, the outer edge of the roller 10 is propped against the outer surface of the inner-layer telescopic joint 5 through the adjusting screw 7, so that the sliding gap between adjacent telescopic joints is reduced, the inner limiting block 9 is arranged at the bottom of the inner-layer telescopic joint 5, the inner-layer telescopic joint 5 is firmer in the telescopic process, meanwhile, the outer limiting block 20 plays a limiting role and also effectively prevents the inner-layer telescopic joint 5 from being separated, and on the other hand, when the inner-layer telescopic joint 5 stretches to the maximum length, namely, the inner limiting block 9 is propped against the outer limiting block 20, the inner-layer telescopic joint 5 and the outer-layer telescopic joint 4 are guaranteed to be consistent in axis, and therefore, the structure can use vertical lifting and is high in stability, and the maximum rescue height of the telescopic arm 2 is equal to the telescopic length of the telescopic arm itself.

As shown in fig. 5, the rodless cavity of the horizontal cylinder 11 is communicated with the oil port a of the first reversing valve 15, the rod cavity of the horizontal cylinder 11 is communicated with the oil port B of the first reversing valve 15, the oil port P of the first reversing valve 15 is communicated with the oil inlet pipeline 13, the oil port T of the first reversing valve 15 is communicated with the oil return pipeline 14, the rodless cavity of the vertical cylinder 12 is connected with the oil port a of the second reversing valve 16 through the first hydraulic control one-way valve 17, the rod cavity of the vertical cylinder 12 is connected with the oil port B of the second reversing valve 16 through the second hydraulic control one-way valve 18, the hydraulic control port of the second hydraulic control one-way valve 18 is connected with the oil port a of the second reversing valve 16, the hydraulic control port of the first hydraulic control one-way valve 17 and the second hydraulic control one-way valve 18 can maintain the current pressure of the vertical cylinder 12, the hydraulic oil leakage caused by the load bearing change is avoided, the output of the piston rod of the vertical cylinder 12 is stabilized, the second reversing valve 16 is connected with the inclination sensor 19, the P oil port of the second reversing valve 16 is communicated with the oil inlet pipeline 13, the T oil port of the second reversing valve 16 is communicated with the oil return pipeline 14, the first reversing valve 15 is an O-shaped three-position four-way electromagnetic reversing valve, the second reversing valve 16 is a Y-shaped three-position four-way electromagnetic reversing valve, specifically, the electromagnetic coil of the second reversing valve 16 is connected with the inclination sensor 19, the inclination sensor 19 is usually arranged on the telescopic arm 2 and used for detecting whether the telescopic arm 2 is vertical to the ground in the lifting process, the inclination sensor 19 is a common device for a person skilled in the art, the telescopic arm 2 can be purchased and installed according to the required model, when in use, the inclination sensor 19 feeds back a detection signal to a control unit, the control unit is usually a PLC or a singlechip, and then the control unit controls the corresponding reversing valve to control the corresponding hydraulic actuating element when in work, the hydraulic oil is fed into the rodless cavity of the horizontal oil cylinder 11, the horizontal oil cylinder 11 drives the vertical oil cylinder 12 to horizontally move, after the horizontal oil cylinder 11 stretches out to the maximum position, the first reversing valve 15 is locked, the O-shaped three-position four-way electromagnetic reversing valve is switched to the middle position, so that the horizontal oil cylinder 11 keeps the current state, the rodless cavity of the vertical oil cylinder 12 starts to feed oil, meanwhile, hydraulic oil opens the second hydraulic control one-way valve 18, so that the hydraulic oil with the rod cavity of the vertical oil cylinder 12 can return to the oil return pipeline 14, the automobile chassis 1 is supported to rise, after the right position is reached, the four corners of the automobile chassis 1 are all horizontal, the Y-shaped three-position four-way electromagnetic reversing valve is switched to the middle position, the rod cavity of the vertical oil cylinder 12 does not feed oil any more, under the action of the first hydraulic control one-way valve 17 and the second hydraulic control one-way valve 18, once a certain corner of the automobile chassis 1 inclines due to overlarge, the inclination sensor 19 is communicated with the electromagnetic coil of the second reversing valve 16, the rodless cavity of the vertical oil cylinder 12 starts to feed oil, the inclination sensor 19 compensates the inclination quantity of the piston rod of the vertical oil cylinder 12, and the vertical oil cylinder 12 keeps the vertical position after the horizontal position is kept.

As is known, the greater the support area of the vehicle chassis 1, the greater the stability of the vehicle chassis 1 and thus the correspondingly greater the stability of the telescopic boom 2, for which purpose the horizontal cylinder 11 is provided as a secondary hydraulic cylinder, increasing the horizontal extension of the hydraulic legs 3. Specifically, as shown in fig. 6, the horizontal cylinder 11 includes a first cylinder 1101 mounted at a fixed position, a second cylinder 1102 is slidably mounted in the first cylinder 1101, a third cylinder 1103 is slidably mounted in the second cylinder 1102, the third cylinder 1103 is equivalent to a piston rod of the horizontal cylinder 11, sliding seal mechanisms are respectively provided between the second cylinder 1102 and the first cylinder 1101 and between the second cylinder 1102 and the third cylinder 1103 to avoid hydraulic oil leakage, an end of the third cylinder 1103 is connected with the vertical cylinder 12, the first cylinder 1101 is communicated with the second cylinder 1102, an end of the third cylinder 1103 is fixedly mounted with a plunger 1104 slidably mounted in the second cylinder 1102, a third central cylinder 1107 is provided in the third cylinder 1103, an oil through port 1108 is provided at an end of the third central cylinder 1107 remote from the plunger 1104, the other end of the third central cylinder 1107 extends into the second cylinder 1102 through the plunger 1104, only a second central cylinder 1106 is adapted to the second cylinder 1102, the second central cylinder 1110 is provided with an inner cavity 1110, the first central cylinder 1110 is provided with a first reversing valve 1105 is connected with a second hydraulic oil port 1109, a horizontal reversing valve 1101 is connected to the first end of the first cylinder 1101, and a horizontal hydraulic oil port is communicated with a horizontal hydraulic oil port 1101 is provided at the end of the second cylinder 1101, and a horizontal reversing valve 1101 is communicated with a horizontal hydraulic oil port 9 is communicated with the first hydraulic oil port 1101 is communicated with the first hydraulic oil port. When the horizontal second working oil port 1110 is used for oil feeding, hydraulic oil in the oil feeding pipeline 13 enters the first cylinder 1101, the plunger 1104 is pushed to drive the third cylinder 1103 to extend, meanwhile, the vertical oil cylinder 12 is driven to horizontally move, hydraulic oil in the third cylinder 1103 returns to the oil return pipeline 14 through the oil feeding port 1108, after the third cylinder 1103 completely extends, oil feeding continues in the first cylinder 1101, the second cylinder 1102 continues to extend outwards, meanwhile, the vertical oil cylinder 12 is driven to horizontally move, the horizontal moving distance of the vertical oil cylinder 12 is increased by the horizontal oil cylinder 11 with the structure, the supporting area is increased, and the supporting stability is further improved.

A first sleeve 1201 and a second sleeve 1202 are arranged in the third cylinder 1103 in parallel, one end of the first sleeve 1201 is connected with the first hydraulic control check valve 17, the other end of the first sleeve 1201 penetrates through the plunger 1104 to extend into the second cylinder 1102, one end of the second sleeve 1202 is connected with the second hydraulic control check valve 18, the other end of the second sleeve 1202 penetrates through the plunger 1104 to extend into the second cylinder 1102, a third sleeve 1203 is sleeved in the first sleeve 1201, a fourth sleeve 1204 is sleeved in the second sleeve 1202, both the third sleeve 1203 and the fourth sleeve 1204 are matched with the second cylinder 1102, a fifth sleeve 1205 is sleeved in the third sleeve 1203, a sixth sleeve 1206 is sleeved in the fourth sleeve 1204, both the fifth sleeve 1205 and the sixth sleeve 1206 are matched with the first cylinder 1101, sliding sealing structures are arranged between the first sleeve 1201 and the third sleeve 1203 and between the third sleeve 1203 and the second sleeve 1202 so as to avoid leakage of hydraulic oil, and also sliding sealing structures are arranged between the second sleeve 1202 and the fourth sleeve 1204 and the sixth sleeve 1206 so as to avoid leakage of hydraulic oil, the end of the fifth sleeve 1205 is connected with a fourth sleeve 1206 and the end of the fourth sleeve 1206 is connected with a reversing valve 16, and the end of the reversing valve 16 is connected with a reversing valve 16B. The structure fully utilizes the internal space of the horizontal cylinder 11, and the oil inlet and return pipelines 14 of the vertical cylinder 12 are arranged in the horizontal cylinder, so that a plurality of external hydraulic oil pipes are not required to be pulled, and the structure is simple and practical.

The embodiment of the invention is generally arranged at the four corners of the automobile chassis 1 respectively, has large supporting area and high stability, can monitor the change of the inclination angle of the chassis at any time, and can adjust the chassis level in time, thereby ensuring the smooth implementation of fire rescue.

While the invention has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.

Claims

1. The telescopic boom stabilizing system of the fire truck with the ascending platform comprises telescopic booms arranged on an automobile chassis, wherein hydraulic support legs are arranged on the automobile chassis and the telescopic booms, each hydraulic support leg comprises a vertical oil cylinder and a horizontal oil cylinder, the axes of the vertical oil cylinders are vertical, the cylinder bodies of the vertical oil cylinders are arranged on piston rods of the horizontal oil cylinders, each telescopic boom comprises a plurality of telescopic joints sleeved together, flanges are arranged at the top ends of each telescopic joint, an inner telescopic joint penetrates through the flange at the top end of an outer telescopic joint, the telescopic boom stabilizing system is characterized in that a swinging arm is arranged between every two adjacent telescopic joints, one end of each swinging arm is hinged to the telescopic joint at the outer layer, an inclined guide surface is arranged at the other end of each swinging arm, rollers are arranged at one end of each swinging arm close to the inclined guide surface, adjusting screws are connected to the flanges at the top ends of the outer telescopic joints in a threaded mode, the outer edges of the rollers are propped against the outer surfaces of the inner telescopic joints under the action of the adjusting screws, the cross section of the telescopic joints is square, each panel at least provided with two groups of telescopic joints at intervals are provided with corresponding rolling nuts, and the corresponding rolling wheels are arranged between the two telescopic joints; the rodless cavity of the horizontal cylinder is communicated with the A port of the first reversing valve, the rod cavity of the horizontal cylinder is communicated with the B port of the first reversing valve, the P port of the first reversing valve is communicated with an oil inlet pipeline, the T port of the first reversing valve is communicated with an oil return pipeline, the rodless cavity of the vertical cylinder is connected with the A port of the second reversing valve through a first hydraulic control one-way valve, the rod cavity of the vertical cylinder is connected with the B port of the second reversing valve through a second hydraulic control one-way valve, the hydraulic control port of the first hydraulic control one-way valve is connected with the B port of the second reversing valve, the hydraulic control port of the second hydraulic control one-way valve is connected with the A port of the second reversing valve, the P port of the second reversing valve is communicated with the oil inlet pipeline, the T port of the second reversing valve is communicated with the oil return pipeline, the second reversing valve is connected with an inclination sensor, the first reversing valve is an O-shaped three-position four-way electromagnetic reversing valve, the second reversing valve is a Y-shaped three-position four-way electromagnetic reversing valve, an electromagnetic coil of the second reversing valve is connected with the inclination sensor, the horizontal oil cylinder comprises a first cylinder body arranged at a fixed position, a second cylinder body is slidably arranged in the first cylinder body, a third cylinder body is slidably arranged in the second cylinder body, the end part of the third cylinder body is connected with the vertical oil cylinder, the first cylinder body is communicated with the second cylinder body, a plunger slidably arranged in the second cylinder body is fixedly arranged at the end part of the third cylinder body, a third central cylinder is arranged in the third cylinder body, an oil port is arranged at one end of the third central cylinder, which is far away from the plunger, the other end of the third central cylinder penetrates through the plunger to extend into the second cylinder body, a second central cylinder is sleeved in the third central cylinder body, the second central cylinder body is adaptive to the second cylinder body, the second central cylinder is internally sleeved with a first central cylinder, the first central cylinder is matched with a first cylinder body, the end part of the first central cylinder is connected with a horizontal first working oil port at the end part of the first cylinder body, the end part of the first cylinder body is provided with a horizontal second working oil port, the horizontal second working oil port is communicated with an A oil port of a first reversing valve, the horizontal first working oil port is communicated with a B oil port of the first reversing valve, a first sleeve and a second sleeve are arranged in the third cylinder body in parallel, one end of the first sleeve is connected with the first hydraulic control one-way valve, the other end of the first sleeve penetrates through the plunger to extend into the second cylinder body, one end of the second sleeve is connected with the second hydraulic control one-way valve, the other end of the second sleeve penetrates through the plunger to extend into the second cylinder body, a third sleeve is sleeved with the first sleeve, the third sleeve is sleeved with the second sleeve, the third sleeve is parallel with the B oil port of the first reversing valve, one end part of the first sleeve is connected with the second sleeve, one end part of the second sleeve is connected with the sixth sleeve, and the second sleeve is connected with the end part of the first sleeve.

2. The telescopic boom stabilizing system for a fire truck with a climbing platform according to claim 1, wherein an inner limiting block is arranged on the outer surface of the bottom of the inner telescopic joint, and an outer limiting block is arranged on the inner surface of the top of the outer telescopic joint correspondingly.

3. The telescopic boom stabilizing system of a fire truck on a climbing platform according to claim 2, wherein the upper surfaces of all inner limiting blocks are located on the same horizontal plane, and the lower surfaces of all outer limiting blocks are located on the same horizontal plane.