CN111330194B

CN111330194B - High-rise safety auxiliary lifting device based on aerial ladder fire truck

Info

Publication number: CN111330194B
Application number: CN202010252547.6A
Authority: CN
Inventors: 楼林华
Original assignee: Individual
Current assignee: Zhejiang Huisheng Hardware Electromechanical Co.,Ltd.
Priority date: 2018-03-21
Filing date: 2018-03-21
Publication date: 2021-01-29
Anticipated expiration: 2038-03-21
Also published as: CN108478965A; CN111330194A; CN111317945B; CN111317945A; CN108478965B

Abstract

The invention belongs to the technical field of fire fighting, and particularly relates to a high-rise safety auxiliary lifting device based on an aerial ladder fire truck, which comprises a hook, a suspension plate, a shell, a lifting block, a lifting winding wheel, a volute spring, a connecting rod, a centrifugal block spring, a first clamping groove, a lifting mechanism and the like. The invention has simple and safe structure and better practical effect.

Description

High-rise safety auxiliary lifting device based on aerial ladder fire truck

Technical Field

The invention belongs to the technical field of fire fighting, and particularly relates to a high-rise safety auxiliary lifting device based on an aerial ladder fire truck.

Background

At present, the aerial ladder fire truck is provided with a hydraulic lifting platform for fire fighters to ascend to fight fires such as high-rise buildings, tall and big facilities, oil tanks and the like, rescue trapped personnel, rescue valuable goods and materials and complete other rescue tasks. The vehicle is provided with a telescopic aerial ladder which can be provided with a lifting bucket rotary table and a fire extinguishing device, so that fire fighters can ascend to extinguish fire and rescue trapped people, and the vehicle is suitable for fighting fire of high-rise buildings; however, the lifting of the aerial ladder fire truck is limited, and in order to enable the aerial ladder fire truck to rescue trapped people at higher positions, a lifting mechanism capable of assisting the aerial ladder fire truck needs to be designed.

The invention designs a high-rise safety auxiliary lifting device based on an aerial ladder fire truck to solve the problems.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention discloses a high-rise safety auxiliary lifting device based on an aerial ladder fire truck, which is realized by adopting the following technical scheme.

The utility model provides a high building safety assists hoisting device based on aerial ladder fire engine which characterized in that: the device comprises a shell, a first fixed pulley, a second fixed pulley, a fourth guide block spring, a fourth guide groove, a first clamping groove, a third fixed pulley, a fourth fixed pulley, a first guide block spring, a rectangular guide hole, a second guide groove, a third guide groove, a rectangular guide groove, a second shaft, a third shaft, a first steel wire rope, a second steel wire rope, a third steel wire rope, a fourth steel wire rope, a first steel wire rope spring, a second steel wire rope spring and a lifting mechanism, wherein the shell is arranged on a wall; the shell is composed of a first plate, a second plate, a third plate, a fourth plate and a top plate; the shell is provided with a clapboard; the clapboard is positioned between the first plate and the third plate and is parallel to the first plate; a gap is formed between the partition plate and the top plate; a first mechanism cavity is defined by the first plate, the second plate, the partition plate and the fourth plate; a second mechanism cavity is defined by the second plate, the third plate, the fourth plate and the partition plate; one end of the second shaft is arranged on the fourth plate, and the other end of the second shaft is arranged on the second plate; the second shaft is positioned in the first mechanism cavity and close to the top plate; a first fixed pulley and a third fixed pulley are arranged on the outer circular surface of the second shaft; the first fixed pulley is close to the fourth plate, and the third fixed pulley is close to the second plate; one end of the third shaft is arranged on the fourth plate, and the other end of the third shaft is arranged on the second plate; the third shaft is positioned in the second mechanism cavity and close to the top plate; the second shaft and the third shaft are at equal height positions; a second fixed pulley and a fourth fixed pulley are arranged on the outer circular surface of the third shaft; the second fixed pulley is close to the fourth plate, and the fourth fixed pulley is close to the second plate.

A rectangular guide hole is formed in the middle of the fourth plate of the first mechanism cavity along the vertical direction; a rectangular guide groove is formed in the middle of the second plate of the first mechanism cavity along the vertical direction; the rectangular guide hole is opposite to the rectangular guide groove in position, the length of the rectangular guide hole is equal to that of the rectangular guide groove, and the width of the rectangular guide hole is equal to that of the rectangular guide groove; two second guide grooves are symmetrically formed in two sides of the rectangular guide hole; two third guide grooves are symmetrically formed in two sides of the rectangular guide groove; two surfaces of the partition board opposite to the first board are provided with first guide grooves; a plurality of first clamping grooves distributed in the vertical direction are symmetrically formed in the plate surface of the partition plate provided with the first guide groove relative to the first guide groove; a plurality of fourth guide grooves distributed along the vertical direction are symmetrically formed on the plate surface of the first plate provided with the first guide grooves relative to the first guide grooves; each first clamping groove corresponds to each fourth guide groove one by one; a fourth guide block is arranged in the fourth guide groove; one end of a fourth guide block spring is arranged on the fourth guide block, and the other end of the fourth guide block spring is arranged on the bottom groove surface of the fourth guide groove; the fourth guide block slides in the fourth guide groove; the lifting mechanism is arranged in the first mechanism cavity; a plurality of second clamping grooves are uniformly formed in the side groove surface of each first guide groove along the vertical direction; the lifting mechanism is respectively matched with the rectangular guide hole, the rectangular guide groove, the first guide groove, the second guide groove, the third guide groove, the fourth guide groove, the second clamping groove and the first clamping groove.

The lifting mechanism comprises a hook, a suspension plate, a lifting block, a lifting winding wheel, a steel wire rope winding groove, a volute spiral spring, a first fixed block, a first guide block, a second guide block, a third guide block, a connecting rod, a centrifugal block spring, a fourth shaft, a second fixed block, a third fixed block, a centrifugal block groove, a sliding cavity, a sliding block spring, a limiting strip, a fifth guide block spring, a sliding hole, a first limiting strip hole, a second limiting strip hole, a third limiting strip hole, a fifth guide groove, an oblique angle and a second clamping groove, wherein the lifting block is provided with the sliding cavity; two first limiting strip holes are symmetrically formed in one group of symmetrical side faces of the sliding cavity, and two sliding holes are symmetrically formed in the other group of symmetrical side faces of the sliding cavity; the sliding block is arranged in the sliding cavity; one end of the sliding block spring is arranged on the sliding block, and the other end of the sliding block spring is arranged on the bottom cavity surface of the sliding cavity; the sliding block slides in the sliding cavity through a sliding block spring; two fourth shafts are symmetrically arranged on two sides of the sliding block; the fourth shaft is positioned in the corresponding sliding hole; one end of the fourth shaft, which is not connected with the sliding block, penetrates through the sliding hole and is provided with a lifting winding wheel; two side surfaces of the sliding block, which are not provided with the fourth shaft, are provided with oblique angles; a volute spiral spring is nested on each fourth shaft; one end of the scroll spring is arranged on the side surface of the lifting winding wheel through a third fixed block, and the other end of the scroll spring is arranged on the side surface of the lifting block through a second fixed block; the outer circular surface of one end of the lifting winding wheel close to the volute spiral spring is provided with a steel wire rope winding groove; two centrifugal block grooves are symmetrically formed in the outer circular surface of the lifting winding wheel; the centrifugal block is arranged in the centrifugal block groove; one end of the centrifugal block spring is arranged on the centrifugal block, and the other end of the centrifugal block spring is arranged on the bottom groove surface of the centrifugal block groove; the centrifugal block slides in the centrifugal block groove through a centrifugal block spring; two first fixed blocks are symmetrically arranged on the two side surfaces of the lifting block, which are provided with the first limiting strip holes; each first fixing block is provided with a first limiting strip hole; one end of each first fixed block, which is not connected with the lifting block, is provided with a first guide block; each first guide block is provided with a third limiting strip hole; two fifth guide grooves are symmetrically formed in two sides of each third limiting strip hole; each first limiting bar hole is communicated with the corresponding second limiting bar hole and the corresponding third limiting bar hole.

For any one of the two first limiting strip holes, the first limiting strip hole, the corresponding second limiting strip hole and the corresponding third limiting strip hole form a total limiting strip hole; one end of the limiting strip is provided with an oblique angle, and the other end of the limiting strip is provided with a round angle; two fifth guide blocks are symmetrically arranged on two sides of the limiting strip; the limiting strip is arranged in the total limiting strip hole through the matching of the fifth guide block and the fifth guide groove; a fifth guide block spring is arranged between the fifth guide block and the groove surface of the fifth guide groove; the fifth guide block spring is positioned in the fifth guide groove; the limiting strip slides in the total limiting strip hole through the fifth guide block.

The lower plate surface of the lifting block is provided with a connecting rod; one end of the connecting rod, which is not connected with the lifting block, is provided with a suspension plate; the upper plate surface of the suspension plate is vertical to the side surface of the lifting winding wheel; a hook is arranged on the lower plate surface at one end of the hanging plate, and two third guide blocks are symmetrically arranged on two side surfaces at the other end of the hanging plate; two second guide blocks are symmetrically arranged on two side surfaces of the middle end of the suspension plate.

The distance between the second guide block and the third guide block on the same side is equal to the distance between the second guide groove and the third guide groove; one end of the suspension plate, which is provided with the third guide block, is positioned in the rectangular guide groove and slides in the rectangular guide groove, and the other end of the suspension plate penetrates through the rectangular guide hole and slides in the rectangular guide hole; the third guide blocks are positioned in the corresponding third guide grooves and slide in the third guide grooves; the second guide blocks are positioned in the corresponding second guide grooves and slide in the second guide grooves; the first guide blocks are positioned in the corresponding first guide grooves; one end of the first guide block spring, which is not connected with the first guide block, is arranged on the lower groove surface of the first guide groove, and the first guide block slides in the first guide groove through the first guide block spring; the centrifugal block is respectively matched with the corresponding fourth guide groove and the first clamping groove.

The lifting winding wheel close to the second guide block is named as a first lifting winding wheel; the lifting winding wheel close to the third guide block is named as a second lifting winding wheel; the first lifting winding wheel, the first fixed pulley and the second fixed pulley are positioned on the same plane; the second lifting winding wheel is positioned on the same plane with the third fixed pulley and the fourth fixed pulley.

The oblique angle on the limiting strip is matched with the oblique angle on the sliding block; one end of the limiting strip with a round angle is matched with the corresponding second clamping groove.

One end of the first steel wire rope is arranged on the steel wire rope winding groove of the first lifting winding wheel and wound by a circle of the steel wire rope winding groove of the first lifting winding wheel, and the other end of the first steel wire rope is provided with a first steel wire rope spring; one end of the third steel wire rope is connected with one end of the first steel wire rope spring, which is not connected with the first steel wire rope, and the other end of the third steel wire rope is connected with a power source of the aerial ladder fire truck through the first fixed pulley and the second fixed pulley.

One end of a second steel wire rope is arranged on the steel wire rope winding groove of the second lifting winding wheel and wound by a circle of the steel wire rope winding groove of the second lifting winding wheel, and the other end of the second steel wire rope is provided with a second steel wire rope spring; one end of a fourth steel wire rope is connected with one end of the second steel wire rope spring, which is not connected with the second steel wire rope, and the other end of the fourth steel wire rope is connected with a power source of the aerial ladder fire truck through a third fixed pulley and a fourth fixed pulley.

As the further improvement of aerial ladder fire engine, install aerial ladder on the aerial ladder fire engine, its characterized in that: the aerial ladder comprises a lifting platform, a bucket rotary table, a platform arm lock mechanism, a platform frame, an annular hook sleeve, a motor, a ring sleeve, a platform winding wheel, a steel wire rope winding groove and a first shaft, wherein the lifting platform is arranged on the aerial ladder; a platform arm lock mechanism is arranged on the lifting platform; the bucket rotary table is arranged on the platform arm lock mechanism; the platform frame is arranged on the bucket turntable; the annular hook sleeve is arranged on the platform frame; the motor is arranged on the lifting platform through the fixed block; one end of the first shaft is connected with a motor shaft, and the other end of the first shaft is provided with a platform winding wheel; the ring sleeve is arranged on the outer circular surface of the platform winding wheel and is arranged on the lifting platform through the fixing block; the outer circular surfaces of the two ends of the platform winding wheel are respectively provided with a steel wire rope winding groove; a steel wire rope winding groove close to the bucket turntable on the platform winding wheel is named as a first steel wire rope winding groove; another steel wire rope winding groove on the platform winding wheel is named as a second steel wire rope winding groove; the hook is matched with the annular hook sleeve.

As a further improvement of the technology, one end of the third steel wire rope is connected with the end of the first steel wire rope spring which is not connected with the first steel wire rope, and the other end of the third steel wire rope is matched with the first steel wire rope winding groove of the platform winding wheel through the first fixed pulley and the second fixed pulley.

As a further improvement of the present technology, one end of the fourth steel wire rope is connected to the end of the second steel wire rope spring not connected to the second steel wire rope, and the other end of the fourth steel wire rope is matched with the second steel wire rope winding groove of the platform winding wheel through the third fixed pulley and the fourth fixed pulley.

As a further improvement of the present technique, when the fourth guide block spring is not compressed, the spacing between the fourth guide block and the top groove surface of the fourth guide groove is equal to the width of the centrifugal block.

As a further improvement of the technology, one end of the centrifugal block, which is not connected with the centrifugal block spring, is provided with a round angle.

As a further improvement of the present technique, the suspension plate is located at the bottom of the rectangular guide hole and the rectangular guide groove when the lift block is not pulled up.

As a further improvement of the present technique, when the winding wheel is not pulled up, the slider spring is in a stretched state; the fifth guide block spring is in a compressed state; one end of the limiting strip with a round corner is inserted into the corresponding second clamping groove;

as a further improvement of the technology, when the lifting winding wheel is not pulled up, the sliding block cannot move upwards relative to the lifting block under the extrusion of the two limit strips.

The first steel wire rope and the second steel wire rope are wound in the steel wire rope winding grooves of the corresponding lifting steel wire rope winding wheel for one circle, and the functions of the first steel wire rope and the second steel wire rope are as follows: when the first steel wire rope or the second steel wire rope can be wound on the corresponding steel wire rope winding groove of the platform steel wire rope winding wheel under the rotation of the platform steel wire rope winding wheel, and then the first steel wire rope and the second steel wire rope wound in the steel wire rope winding groove of the lifting steel wire rope winding wheel are released, so that the lifting steel wire rope winding wheel slowly rotates, and the lifting steel wire rope winding wheel stops rotating after the first steel wire rope and the second steel wire rope are released, so that the volute spiral spring is compressed to store energy in the rotating process of the lifting steel wire rope winding wheel.

The function of the scroll spring is: when the first steel wire rope or the second steel wire rope is broken, the lifting steel wire rope wheel can rotate quickly under the condition that the volute spiral spring releases energy instantly, so that the centrifugal block extends out of the centrifugal block groove to be matched with the first clamping groove.

In the invention, the sliding block slides in the sliding cavity through the sliding block spring, so that the sliding block can move and reset by the sliding block spring; two fourth shafts are symmetrically installed on two sides of the sliding block, a lifting steel wire winding wheel is installed on the fourth shafts, the lifting steel wire winding wheel can rotate around the axis of the fourth shafts, and meanwhile the up-and-down movement of the lifting steel wire winding wheel can drive the up-and-down movement of the sliding block through the fourth shafts.

One end of the limiting strip is provided with a round angle, so that the limiting strip can conveniently enter and exit the second clamping groove.

Spacing is installed in total spacing hole, and the one end that spacing has the fillet cooperatees with corresponding second draw-in groove, and the oblique angle of spacing and the oblique angle matched with effect of slider are: on one hand, when the sliding block is not lifted, the sliding block can extrude the limiting strips into the corresponding second clamping grooves under the action of the sliding block spring, the fifth guide block spring is compressed, and the limiting generated by the limiting strips and the second clamping grooves can indirectly prevent the lifting mechanism from moving upwards; on the other hand, when the slider was mentioned, the slider will no longer extrude spacing, and spacing can make the fifth guide block remove to reset under the effect of fifth guide block spring, and then spacing can move to the slip intracavity, and spacing breaks away from the second draw-in groove, and spacing like this will unable and second draw-in groove production spacing, and elevating system can the rebound so.

The first guide block spring has the function of playing a certain buffering role in the descending process of the lifting block.

One end of the connecting rod is arranged on the lifting block, and the other end of the connecting rod is arranged on the suspension plate, so that the lifting block can drive the suspension plate to move up and down through the connecting rod; two second guide blocks and a third guide block are symmetrically arranged on two sides of the suspension plate, the second guide blocks are located in the second guide grooves, the third guide blocks are located in the third guide grooves, so that the suspension plate can drive the second guide blocks and the third guide blocks to move up and down in the corresponding second guide grooves and third guide grooves, and meanwhile, the effect of preventing the suspension plate from inclining when moving up and down can be achieved.

One end of the centrifugal block is provided with a round angle, so that the centrifugal block can conveniently enter and exit the first clamping groove and the fourth guide groove.

The centrifugal block is respectively matched with the corresponding first clamping groove and the fourth guide groove to function as: on one hand, in the process that the lifting winding wheel rotates slowly, because the centrifugal force generated by the centrifugal block is small, the centrifugal block cannot slide out of the centrifugal block groove and further cannot enter the first clamping groove or the fourth guide groove; on the other hand, under the action of energy quickly released by the volute spiral spring, in the process of quick rotation of the lifting winding wheel, because the centrifugal force generated by the centrifugal block is large, the centrifugal block can slide out of the centrifugal block groove at the moment, one end of the centrifugal block, extending out of the centrifugal block groove, is always in contact with the two side cavity surfaces of the first mechanism cavity, and when the lifting winding wheel drives the centrifugal block to rotate to the positions of the first clamping groove and the fourth guide groove, the centrifugal block is inserted into an interval formed by the first clamping groove or the top groove surface of the fourth guide groove and the top groove surface of the fourth guide groove under the action of the centrifugal force.

The first wire rope spring has the functions of: when the third steel wire rope pulls the first steel wire rope, a certain buffering effect can be achieved; in addition, when the lifting mechanism is pulled only by the third steel wire rope and the first steel wire rope in case of emergency, the lifting mechanism can also play a certain buffering role, and the third steel wire rope or the first steel wire rope is prevented from being suddenly broken when encountering sudden impact force.

The second wire rope spring has the functions of: when the fourth steel wire rope pulls the second steel wire rope, a certain buffering effect can be achieved; in addition, when the lifting mechanism is pulled only by the fourth steel wire rope and the second steel wire rope in case of emergency, the lifting mechanism can also play a certain buffering role, so that the fourth steel wire rope or the second steel wire rope is prevented from being suddenly broken when encountering sudden impact force.

In the invention, the platform winding wheel is connected with a motor shaft on the motor through the first shaft, so that the motor can drive the platform winding wheel to rotate through the first shaft; the hook in the lifting mechanism is matched with the annular hook sleeve, so that the hook can hook the annular hook sleeve, and the lifting mechanism can drive the bucket turntable to move up and down through the annular hook sleeve and the platform frame; platform arm lock mechanism installs on lift platform, and the fill revolving stage is installed on platform arm lock mechanism, and the effect of platform arm lock mechanism is so: when the hook in the lifting mechanism does not hook the annular hook sleeve, the platform arm locking mechanism can lock the bucket turntable to prevent the bucket turntable from falling; when the hook in elevating system hooks annular hook cover upward movement, platform arm locking mechanism unblock is spacing to fighting the revolving stage, and then elevating system can drive and fight revolving stage up-and-down motion to realize fighting the revolving stage and being assisted the promotion and rescue trapped personnel that aerial ladder fire truck can't rescue in higher department, greatly increased trapped personnel's survival probability in higher department. When the third steel wire rope pulls the first steel wire rope, a certain buffering effect can be achieved; in addition, when the lifting mechanism is pulled only by the third steel wire rope and the first steel wire rope in case of emergency, the lifting mechanism can also play a certain buffering role, and the third steel wire rope or the first steel wire rope is prevented from being suddenly broken when encountering sudden impact force.

When the lifting winding wheel does not rotate, the suspension plate is positioned at the bottoms of the rectangular guide hole and the rectangular guide groove; when the lifting winding wheel is not lifted, one end of the limiting strip with a round angle is inserted into the corresponding second clamping groove, and the fifth guide block spring is compressed.

When a fire disaster occurs in a high building and a bucket turntable on the aerial ladder fire truck reaches the highest rescue height, one end of a first steel wire rope is installed on a first steel wire rope winding groove, one end of a second steel wire rope is installed on a second steel wire rope winding groove, and a hook hooks an annular hook sleeve; when the motor is started, the motor drives the platform winding wheel to rotate through the first shaft, the platform winding wheel winds the first steel wire rope and the second steel wire rope, the first steel wire rope wound on the first lifting winding wheel and the second steel wire rope wound on the second lifting winding wheel are slowly released, the first lifting winding wheel and the second lifting winding wheel rotate slowly, and the scroll spring also rotates along with the lifting winding wheel to store energy; when the first steel wire rope wound on the first lifting winding wheel and the second steel wire rope wound on the second lifting winding wheel are released, the lifting winding wheel stops rotating, and the scroll spring reaches the maximum energy storage state; when the platform winding wheel continues to rotate under the driving of the motor, the first steel wire rope and the second steel wire rope drive the first lifting winding wheel and the second lifting winding wheel to move upwards, the first lifting winding wheel and the second lifting winding wheel drive the sliding block to move upwards through the fourth shaft, when the sliding block moves upwards to the maximum limit, the fifth guide block spring enables the fifth guide block to move and reset, the limiting strip can move towards the sliding cavity and is separated from the second clamping groove, so that the limiting strip cannot limit the second clamping groove, and the lifting mechanism can move upwards; under the condition that the first lifting winding wheel and the second lifting winding wheel continue to move upwards, the sliding block can drive the lifting block to move upwards, and the lifting block can drive the bucket turntable to move upwards through the connecting rod, the suspension plate, the hook, the annular hook sleeve and the platform frame; after the bucket rotary table rescues trapped persons at the height, the bucket rotary table moves downwards under the reverse driving of the motor until the trapped persons stop on the platform arm locking mechanism, and the trapped persons evacuate from the bucket rotary table, so that danger is avoided.

When the lifting mechanism moves upwards: when one of the first steel wire rope and the third steel wire rope or one of the second steel wire rope and the fourth steel wire rope is suddenly broken, taking the first steel wire rope of the first steel wire rope and the third steel wire rope as an example, the first steel wire rope does not pull the first lifting winding wheel to move up and down any more, at the moment, the volute spiral spring storing the maximum rotation energy is quickly reset, and the first lifting winding wheel is quickly rotated; in the process of rapid rotation of the lifting winding wheel, because the centrifugal force generated by the centrifugal block is large, the centrifugal block can slide out of the centrifugal block groove, and one end of the centrifugal block, which extends out of the centrifugal block groove, is always in contact with the two side cavity surfaces of the first mechanism cavity; sudden stop in the rising process of the bucket turntable also means that one of the first steel wire rope or the second steel wire rope is broken, so that potential safety hazards can be found in time conveniently.

When the lifting mechanism moves downwards: when one of the first steel wire rope and the third steel wire rope or one of the second steel wire rope and the fourth steel wire rope is suddenly broken in the process of up-and-down movement of the lifting mechanism, taking the first steel wire rope of the first steel wire rope and the third steel wire rope as an example, the first steel wire rope does not pull the first lifting winding wheel to move up and down any more, at the moment, the volute spiral spring storing the maximum rotation energy is quickly reset, and the first lifting winding wheel rotates quickly; in the process of rapid rotation of the lifting winding wheel, because the centrifugal force generated by the centrifugal block is large, the centrifugal block can slide out of the centrifugal block groove, and one end of the centrifugal block extending out of the centrifugal block groove is always in contact with the two side cavity surfaces of the first mechanism cavity, when the lifting winding wheel drives the centrifugal block to rotate to the positions of the first clamping groove and the fourth guide groove, the centrifugal block is inserted into the interval formed by the first clamping groove or the fourth guide block and the top groove surface of the fourth guide groove under the action of the centrifugal force, under the sliding action of the fourth guide block, the centrifugal block on the fourth guide block of the first lifting winding wheel moves downwards to enable the first lifting winding wheel to continue rotating, and simultaneously, because the bucket turntable is in the process of downward moving, the centrifugal block of the first lifting winding wheel which continues rotating collides with the interval between the first clamping groove and the top surface of the fourth guide block below in turn to distribute a part of the weight of the bucket turntable, the buffer function is achieved, and the second steel wire rope which is not broken is protected; the bucket turntable is safely dropped. In the process, the initial rotation of the first lifting winding wheel is driven by the volute spiral spring, the later rotation is driven by the shifting of the first clamping groove and the fourth guide groove, the number of the rotation turns of the first lifting winding wheel in the subsequent rotation is larger than the number of the deformation turns of the volute spiral spring, and the volute spiral spring is damaged definitely, so that the damaged volute spiral spring needs to be replaced after the bucket turntable falls to the platform arm locking mechanism.

When the lifting mechanism moves upwards or downwards, when one of the first steel wire rope and the third steel wire rope is simultaneously broken with one of the second steel wire rope and the fourth steel wire rope, the volute spiral spring storing the maximum rotation energy is quickly reset, and the first lifting winding wheel and the second lifting winding wheel both rotate quickly; in the process of rapid rotation of the lifting winding wheel, because the centrifugal force generated by the centrifugal block is large, the centrifugal block can slide out of the centrifugal block groove, one end of the centrifugal block extending out of the centrifugal block groove is always in contact with the two side cavity surfaces of the first mechanism cavity, when the lifting winding wheel drives the centrifugal block to rotate to the positions of the first clamping groove and the fourth guide groove, the centrifugal block is inserted into the interval formed by the first clamping groove or the fourth guide block and the top groove surface of the fourth guide groove under the action of the centrifugal force, under the sliding of the fourth guide block, the centrifugal block on the fourth guide block of the first lifting winding wheel and the second lifting winding wheel moves downwards, so that the first lifting winding wheel and the second lifting winding wheel continue to rotate, meanwhile, the traction of collision between the first steel wire rope and the second steel wire rope is avoided, the bucket turntable is in the process of downward movement, and the centrifugal blocks of the first lifting winding wheel and the second lifting winding wheel which continue to rotate sequentially and the clamping grooves of the first lifting winding wheel and the fourth guide block below and the top surface of the fourth guide groove are in the downward movement The buffer has the function of buffering and decelerating. In addition, when one of the first steel wire rope and the third steel wire rope and one of the second steel wire rope and the fourth steel wire rope are simultaneously broken, the first lifting winding wheel and the second lifting winding wheel do not drive the sliding block to move upwards to the maximum position any more through the fourth shaft, at the moment, under the action of the sliding block spring, the sliding block moves downwards to reset, and then under the extrusion of the sliding block, the limiting strip extends out of the total limiting strip hole to be contacted with the side groove surface of the first guide groove; when the lifting mechanism descends to the position where the limiting strip is opposite to the corresponding second clamping groove, the limiting strip is inserted into the corresponding second clamping groove under the extrusion of the sliding block; the lifting mechanism continuously falls down, and one end of the limiting strip has the effect of a round angle, so that the limiting strip is separated from the corresponding second clamping groove again, the limiting strip extrudes the sliding block in a small range at the moment, and the sliding block moves upwards in a small range; when the lifting mechanism continues to descend to the position where the limiting strip is opposite to the other corresponding second clamping groove, the movement of the limiting strip repeats the process until the lifting mechanism descends to the position where the lifting mechanism is not pulled up. The design that the limiting block enters and exits the second clamping groove and the centrifugal block enters and exits the first clamping groove and the fourth guide groove finally ensures that when the lifting mechanism falls to the minimum, trapped personnel on the bucket rotary table can bear slight falling impact, and the situation that the trapped personnel are injured again when encountering emergency is prevented. In the process, the initial rotation of the first lifting winding wheel and the second lifting winding wheel is driven by the scroll spring, the later rotation is driven by the shifting of the first clamping groove and the fourth guide groove, the rotating number of turns of the first lifting winding wheel and the second lifting winding wheel in the subsequent rotation is necessarily greater than the number of turns of the scroll spring which can deform, the scroll spring is necessarily damaged, and the damaged scroll spring needs to be replaced after the bucket turntable falls to the platform arm locking mechanism.

Compared with the traditional fire fighting technology, the lifting mechanism can drive the bucket turntable to continuously move upwards under the driving of the motor so as to rescue trapped people which cannot be rescued at a higher position of the aerial ladder fire truck, and meanwhile, when the auxiliary lifting mechanism meets an emergency, the lifting mechanism can still play a basic role in dealing with the emergency, so that the trapped people are prevented from being injured again when meeting the emergency. The invention has simple and safe structure and better practical effect.

Drawings

Fig. 1 is a schematic view of the auxiliary lifting mechanism and an aerial ladder fire truck.

Fig. 2 is a schematic view of the auxiliary lifting mechanism and the aerial ladder fire truck.

Fig. 3 is a schematic view of a bucket turret installation.

Fig. 4 is a schematic view of the platform winding wheel installation.

Fig. 5 is a schematic view of an auxiliary lifting mechanism.

Fig. 6 is a perspective schematic view of an auxiliary lifting mechanism.

Fig. 7 is a schematic top sectional view of the auxiliary lifting mechanism.

Fig. 8 is a side sectional (a) schematic view of the auxiliary lifting mechanism.

Fig. 9 is a partially enlarged side sectional view (one) of the auxiliary lifting mechanism.

Fig. 10 is a side sectional (two) schematic view of the auxiliary lifting mechanism.

Fig. 11 is a partially enlarged side sectional view (ii) of the auxiliary lifting mechanism.

Fig. 12 is a schematic view of the housing structure.

Fig. 13 is a sectional (first) view of the housing from above.

Fig. 14 is a sectional (two) top view of the housing.

Fig. 15 is a side sectional elevational (first) schematic view of the housing.

Fig. 16 is a partially enlarged side sectional view (one) of the housing.

Fig. 17 is a side sectional front view (two) of the housing.

Fig. 18 is a partially enlarged side sectional view (ii) of the housing.

Fig. 19 is a schematic view of the internal structure of the auxiliary lifting mechanism.

Fig. 20 is a schematic view of the first fixed sheave installation.

Fig. 21 is a schematic view of a fourth guide block structure.

Fig. 22 is an overall schematic view of the elevating mechanism.

Fig. 23 is a schematic view of the connecting rod installation.

Fig. 24 is a sectional view showing the installation of the stopper bar.

Fig. 25 is a perspective schematic view of the elevator block.

Fig. 26 is a schematic cross-sectional view of the elevator block.

Fig. 27 is a schematic cross-sectional view of the first guide block.

Fig. 28 is a schematic view of the structure of the spacing strip.

Figure 29 is a cross-sectional view of the fourth shaft installation.

FIG. 30 is a schematic view of a slider configuration.

Fig. 31 is a schematic view of the lift winding wheel installation.

Fig. 32 is a perspective schematic view of the lifting winding wheel.

FIG. 33 is a schematic diagram of an eccentric mass structure.

Fig. 34 is a schematic view of the installation of the first and third wire ropes.

Fig. 35 is a schematic view of a second wire rope and a fourth wire rope.

FIG. 36 is a schematic diagram of the operation of the centrifugal mass.

Number designation in the figures: 1. a wall body; 2. aerial ladder fire truck; 3. an aerial ladder; 4. a lifting platform; 5. a bucket turntable; 6. an auxiliary lifting mechanism; 7. a platform arm lock mechanism; 8. a platform frame; 9. an annular hook sleeve; 10. a motor; 12. sleeving a ring; 13. a platform winding wheel; 14. winding a steel wire rope groove; 15. a first shaft; 16. a hook; 17. a suspension plate; 18. a housing; 19. a lifting block; 20. a lifting winding wheel; 21. a volute spiral spring; 22. a first fixed block; 23. a first guide block; 24. a second guide block; 25. a third guide block; 26. a first fixed pulley; 27. a second fixed pulley; 28. a connecting rod; 29. a centrifugal block; 30. a centrifugal block spring; 31. a fourth guide block; 32. a fourth guide spring; 33. a fourth guide groove; 34. a first card slot; 35. a third fixed pulley; 36. a fourth fixed pulley; 37. a first guide groove; 38. a rectangular guide hole; 39. a second guide groove; 40. a third guide groove; 41. a rectangular guide groove; 42. a second shaft; 43. a third axis; 44. a fourth axis; 45. a lifting mechanism; 46. a second fixed block; 47. a third fixed block; 48. a first guide spring; 50. a centrifugal block groove; 52. round corners; 53. a first wire rope; 54. a second wire rope; 60. a first coil of wire rope groove; 61. a second coil of wire rope groove; 62. a first lifting winding wheel; 63. a second lifting winding wheel; 64. a first plate; 65. a second plate; 66. a third plate; 67. a fourth plate; 68. a top plate; 69. a partition plate; 70. a first mechanism cavity; 71. a second mechanism chamber; 80. a sliding cavity; 81. a slider; 82. a slider spring; 83. a limiting strip; 84. a fifth guide block; 85. a fifth guide spring; 86. a slide hole; 87. a first limit bar hole; 88. a second limit strip hole; 89. a third limit strip hole; 90. a fifth guide groove; 91. oblique angle; 92. a second card slot; 93. a third wire rope; 94. a fourth wire rope; 95. a first wire rope spring; 96. a second wire spring.

Detailed Description

A high-rise safety auxiliary lifting device based on an aerial ladder fire truck is shown in figures 5 and 6 and comprises a shell 18, a first fixed pulley 26, a second fixed pulley 27, a fourth guide block 31, a fourth guide block spring 32, a fourth guide groove 33, a first clamping groove 34, a third fixed pulley 35, a fourth fixed pulley 36, a first guide block spring 48, a rectangular guide hole 38, a second guide groove 39, a third guide groove 40, a rectangular guide groove 41, a second shaft 42, a third shaft 43, a first steel wire rope 53, a second steel wire rope 54 and a lifting mechanism 45, wherein the shell 18 is arranged on a wall body 1 as shown in figures 1 and 2; as shown in fig. 12, 13, and 14, the housing 18 is constituted by a first plate 64, a second plate 65, a third plate 66, a fourth plate 67, and a top plate 68; the housing 18 has a partition 69 therein; the partition 69 is located between the first plate 64 and the third plate 66 and the partition 69 is parallel to the first plate 64; a gap is formed between the partition 69 and the top plate 68; a first mechanism chamber 70 is enclosed by the first plate 64, the second plate 65, the partition 69 and the fourth plate 67; a second mechanism chamber 71 is enclosed by the second plate 65, the third plate 66, the fourth plate 67 and the partition 69; as shown in fig. 5, 19 and 20, the second shaft 42 is mounted at one end on the fourth plate 67 and at the other end on the second plate 65; the second shaft 42 is located in the first mechanism cavity 70 and adjacent to the top plate 68; the first fixed pulley 26 and the third fixed pulley 35 are arranged on the outer circular surface of the second shaft 42; the first crown block 26 is adjacent to the fourth plate 67, and the third crown block 35 is adjacent to the second plate 65; one end of the third shaft 43 is mounted on the fourth plate 67 and the other end is mounted on the second plate 65; the third shaft 43 is located in the second mechanism cavity 71 and near the top plate 68; the second axis 42 and the third axis 43 are in a level position; the second fixed pulley 27 and the fourth fixed pulley 36 are arranged on the outer circular surface of the third shaft 43; the second fixed sheave 27 is adjacent the fourth plate 67 and the fourth fixed sheave 36 is adjacent the second plate 65.

As shown in fig. 14 and 15, a rectangular guide hole 38 is opened in the vertical direction at a middle position of the fourth plate 67 located in the first mechanism chamber 70; as shown in fig. 14 and 17, a rectangular guide groove 41 is formed in the middle position of the second plate 65 of the first mechanism chamber 70 along the vertical direction; the rectangular guide hole 38 is opposite to the rectangular guide groove 41, the rectangular guide hole 38 and the rectangular guide groove 41 have the same length, and the rectangular guide hole 38 and the rectangular guide groove 41 have the same width; as shown in fig. 15 and 16, two second guide grooves 39 are symmetrically formed on both sides of the rectangular guide hole 38; as shown in fig. 17 and 18, two third guide grooves 40 are symmetrically formed on both sides of the rectangular guide groove 41; as shown in fig. 10 and 14, the partition 69 has first guide grooves 37 formed on both surfaces thereof opposite to the first plate 64; as shown in fig. 17 and 18, the plate surface of the partition 69 provided with the first guide groove 37 is provided with a plurality of first locking grooves 34 distributed in the vertical direction symmetrically with respect to the first guide groove 37; as shown in fig. 15 and 16, the first plate 64 having the first guide groove 37 is formed with a plurality of fourth guide grooves 33 distributed in the vertical direction on the plate surface symmetrically with respect to the first guide groove 37; each first card slot 34 corresponds to each fourth guide slot 33 one by one; as shown in fig. 8, 9 and 21, a fourth guide block 31 is mounted in the fourth guide groove 33; one end of the fourth guide spring 32 is mounted on the fourth guide 31, and the other end is mounted on the bottom groove surface of the fourth guide groove 33; the fourth guide block 31 slides in the fourth guide groove 33; as shown in fig. 7, the lifting mechanism 45 is installed in the first mechanism chamber 70; the elevating mechanism 45 is respectively engaged with the rectangular guide hole 38, the rectangular guide groove 41, the first guide groove 37, the second guide groove 39, the third guide groove 40, the fourth guide groove 33, and the first engaging groove 34.

As shown in fig. 22, the lifting mechanism 45 includes a hook 16, a suspension plate 17, a lifting block 19, a lifting winding wheel 20, a steel cord winding groove 14, a spiral spring 21, a first fixed block 22, a first guide block 23, a second guide block 24, a third guide block 25, a connecting rod 28, a centrifugal block 29, a centrifugal block spring 30, a fourth shaft 44, a second fixed block 46, a third fixed block 47, a centrifugal block groove 50, a sliding cavity 80, a sliding block 81, a sliding block spring 82, a limit bar 83, a fifth guide block 84, a fifth guide block spring 85, a sliding hole 86, a first limit bar hole 87, a second limit bar hole 88, a third limit bar hole 89, a fifth guide groove 90, a bevel angle 91, and a second clamping groove 92, as shown in fig. 25 and 26, wherein the lifting block 19 has the sliding cavity 80; two first limiting strip holes 87 are symmetrically formed in one group of symmetrical side surfaces of the sliding cavity 80, and two sliding holes 86 are symmetrically formed in the other group of symmetrical side surfaces; as shown in fig. 24, 29, 30, the slider 81 is mounted in the sliding chamber 80; one end of a slider spring 82 is mounted on the slider 81, and the other end is mounted on the bottom cavity surface of the sliding cavity 80; the slider 81 slides in the sliding chamber 80 by a slider spring 82; two fourth shafts 44 are symmetrically arranged on two sides of the sliding block 81; the fourth shaft 44 is located in the corresponding slide hole 86; as shown in fig. 30 and 31, the end of the fourth shaft 44, which is not connected to the sliding block 81, passes through the sliding hole 86 and is provided with the lifting winding wheel 20; the two side surfaces of the sliding block 81, which are not provided with the fourth shaft 44, are provided with oblique angles 91; a scroll spring 21 is nested on each fourth shaft 44; as shown in fig. 29 and 31, one end of the spiral spring 21 is mounted on the side of the elevation winding wheel 20 through the third fixing block 47, and the other end is mounted on the side of the elevation block 19 through the second fixing block 46; as shown in fig. 31 and 32, a wire rope winding groove 14 is formed on the outer circumferential surface of one end of the winding wheel 20 close to the spiral spring 21; two centrifugal block grooves 50 are symmetrically formed on the outer circular surface of the lifting winding wheel 20; as shown in fig. 9 and 33, the centrifugal block 29 is installed in the centrifugal block groove 50; one end of the centrifugal block spring 30 is arranged on the centrifugal block 29, and the other end is arranged on the bottom groove surface of the centrifugal block groove 50; the centrifugal block 29 slides in the centrifugal block groove 50 through the centrifugal block spring 30; as shown in fig. 24 and 27, two first fixing blocks 22 are symmetrically mounted on two side surfaces of the lifting block 19, which are provided with first limiting strip holes 87; each first fixing block 22 is provided with a second limiting strip hole 88; one end of each first fixed block 22, which is not connected with the lifting block 19, is provided with a first guide block 23; each first guide block 23 is provided with a third limit strip hole 89; two fifth guide grooves 90 are symmetrically formed in two sides of each third limiting strip hole 89; each of the first stopper hole 87 communicates with a corresponding second stopper hole 88 and a corresponding third stopper hole 89.

As shown in fig. 24 and 28, for any one of the two first stopper holes 87, the corresponding second stopper holes 88 and the corresponding third stopper holes 89 constitute a total stopper hole; one end of the limiting strip 83 is provided with a bevel 91, and the other end is provided with a round angle 52; two fifth guide blocks 84 are symmetrically arranged on two sides of the limiting strip 83; the limiting strip 83 is arranged in the general limiting strip hole through the matching of the fifth guide block 84 and the fifth guide groove 90; a fifth guide block spring 85 is arranged between the fifth guide block 84 and the groove surface of the fifth guide groove 90; a fifth guide block spring 85 is located in the fifth guide groove 90; the stopper bar 83 slides in the overall stopper bar hole through the fifth guide block 84.

As shown in fig. 22 and 23, a connecting rod 28 is mounted on the lower plate surface of the lifting block 19; the suspension plate 17 is arranged at one end of the connecting rod 28 which is not connected with the lifting block 19; the upper plate surface of the suspension plate 17 is vertical to the side surface of the lifting winding wheel 20; a hook 16 is arranged on the lower plate surface of one end of the suspension plate 17, and two third guide blocks 25 are symmetrically arranged on the two side surfaces of the other end; two second guide shoes 24 are symmetrically installed on both side surfaces of the middle end of the suspension plate 17.

The distance between the second guide block 24 and the third guide block 25 on the same side is equal to the distance between the second guide groove 39 and the third guide groove 40; as shown in fig. 7, one end of the suspension plate 17, which is provided with the third guide block 25, is located in and slides in the rectangular guide groove, and the other end passes through the rectangular guide hole 38 and slides in the rectangular guide hole; the third guide blocks 25 are positioned in the corresponding third guide grooves 40 and slide in the third guide grooves 40; the second guide blocks 24 are positioned in the corresponding second guide grooves 39 and slide in the second guide grooves 39; as shown in fig. 10 and 11, the first guide blocks 23 are located in the corresponding first guide grooves 37; one end of the first guide block spring 48, which is not connected with the first guide block 23, is mounted on the low groove surface of the first guide groove 37 and the first guide block 23 slides in the first guide groove 37 through the first guide block spring 48; as shown in fig. 9, the eccentric block 29 is engaged with the corresponding fourth guide groove 33 and the first engaging groove 34, respectively.

As shown in fig. 6 and 19, the elevation winding wheel 20 adjacent to the second guide block 24 is named a first elevation winding wheel 62; the elevation winding wheel 20 adjacent to the third guide block 25 is named a second elevation winding wheel 63; the first lifting winding wheel 62 is in the same plane with the first fixed pulley 26 and the second fixed pulley 27; the second elevation winding wheel 63 is positioned on the same plane as the third fixed sheave 35 and the fourth fixed sheave 36.

As shown in fig. 11, the bevel 91 on the stop bar 83 cooperates with the bevel 91 on the slide block 81; one end of the stop strip 83 having the rounded corner 52 mates with the corresponding second detent slot 92.

As shown in fig. 34, one end of the first wire 53 is installed on the winding wire groove 14 of the first elevation winding wheel 62 and wound around the winding wire groove 14 of the first elevation winding wheel 62 by one turn, and the other end is installed with a first wire spring 95; one end of the third steel wire rope 93 is connected with one end of the first steel wire rope spring 95 which is not connected with the first steel wire rope 53, and the other end is connected with the power source of the aerial ladder fire truck 2 through the first fixed pulley 26 and the second fixed pulley 27.

As shown in fig. 35, one end of the second wire rope 54 is installed on the winding wire rope groove 14 of the second elevation winding wheel 63 and wound once around the winding wire rope groove 14 of the second elevation winding wheel 63, and the other end is installed with a second wire rope spring 96; one end of the fourth wire rope 94 is connected with one end of the second wire rope spring 96 which is not connected with the second wire rope 54, and the other end is connected with the power source of the aerial ladder fire truck 2 through the third fixed pulley 35 and the fourth fixed pulley 36.

As shown in fig. 1 and 2, the aerial ladder comprises a lifting platform 4, a bucket turntable 5, a platform arm locking mechanism 7, a platform frame 8, an annular hook sleeve 9, a motor 10, a ring sleeve 12, a platform winding wheel 13, a steel wire rope winding groove 14 and a first shaft 15, wherein the lifting platform 4 is arranged on the aerial ladder 3 as shown in fig. 1 and 3; a platform arm lock mechanism 7 is arranged on the lifting platform 4; the bucket rotary table 5 is arranged on the platform arm lock mechanism 7; the platform frame 8 is arranged on the bucket rotary table 5; the annular hook sleeve 9 is arranged on the platform frame 8; as shown in fig. 3 and 4, the motor 10 is mounted on the lifting platform 4 through a fixing block; one end of the first shaft 15 is connected with a shaft of the motor 10, and the other end is provided with a platform winding wheel 13; the ring sleeve 12 is arranged on the outer circular surface of the platform winding wheel 13, and the ring sleeve 12 is arranged on the lifting platform 4 through a fixed block; the outer circular surfaces of the two ends of the platform winding wheel 13 are respectively provided with a steel wire rope winding groove 14; the winding wire rope groove 14 on the platform winding wheel 13 close to the bucket turning table 5 is named as a first winding wire rope groove 60; another winding wire rope groove 14 on the platform winding wheel 13 is named as a second winding wire rope groove 61; the hook 16 is engaged with the loop-shaped shackle 9.

As shown in fig. 34, one end of the third wire 93 is connected to the end of the first wire spring 95 not connected to the first wire 53, and the other end is engaged with the first winding wire groove 60 of the platform winding wheel 13 via the first fixed sheave 26 and the second fixed sheave 27.

As shown in fig. 35, one end of the fourth wire rope 94 is connected to the end of the second wire spring 96 not connected to the second wire rope 54, and the other end is engaged with the second winding wire rope groove 61 of the platform winding wheel 13 via the third fixed pulley 35 and the fourth fixed pulley 36.

When the fourth guide block spring 32 is not compressed, the distance between the top groove surface of the fourth guide block 31 and the fourth guide groove 33 is equal to the width of the centrifugal block 29.

The end of the eccentric block 29 not connected with the eccentric block spring 30 has a round angle 52.

When the lifting block 19 is not pulled up, the suspension plate 17 is located at the bottom of the rectangular guide hole and the rectangular guide groove 41.

When the lift-winding wheel 20 is not being pulled up, the slider spring 82 is in a stretched state; the fifth guide spring 85 is in a compressed state; one end of the stopper 83 having the rounded corner 52 is inserted into the corresponding second catching groove 92;

when the winding wheel 20 is not pulled up, the slider 81 is not displaced upward relative to the elevator block 19 by being pressed by the two stopper bars 83.

The first and

second wire ropes

53 and 54 are wound once in the winding wire rope grooves 14 of the corresponding elevator winding wire sheave in the present invention to function as: when the first wire rope 53 or the second wire rope 54 is rotated by the platform wire rope winding wheel, the first wire rope 53 or the second wire rope 54 is wound on the corresponding wire rope winding groove 14 of the platform wire rope winding wheel, and then the first wire rope 53 and the second wire rope 54 wound in the wire rope winding groove 14 of the lifting wire rope winding wheel are released, so that the lifting wire rope winding wheel is slowly rotated, and the lifting wire rope winding wheel stops rotating until the first wire rope 53 and the second wire rope 54 are released, so that the spiral spring 21 is compressed to store energy in the rotating process of the lifting wire rope winding wheel.

The scroll spring 21 functions as: when the first wire rope 53 or the second wire rope 54 is broken, the elevator coil rope wheel can be rapidly rotated under the condition that the spiral spring 21 releases energy instantly, so that the centrifugal block 29 extends out of the centrifugal block groove 50 to be matched with the first clamping groove 34.

In the invention, the sliding block 81 slides in the sliding cavity 80 through the sliding block spring 82, so that the sliding block spring 82 can make the sliding block 81 move and reset; two fourth shafts 44 are symmetrically arranged on two sides of the sliding block 81, and a lifting steel wire winding rope wheel is arranged on the fourth shafts 44, so that the lifting steel wire winding rope wheel can rotate around the axis of the fourth shafts 44, and meanwhile, the up-and-down movement of the lifting steel wire winding rope can drive the sliding block 81 to move up and down through the fourth shafts 44.

The round corner 52 at one end of the limiting strip 83 is used for facilitating the movement of the limiting strip 83 into and out of the second locking groove 92.

The limit strip 83 is installed in the general limit strip hole, one end of the limit strip 83 with the round angle 52 is matched with the corresponding second clamping groove 92, and the matching effect of the bevel angle 91 of the limit strip 83 and the bevel angle 91 of the sliding block 81 is as follows: on one hand, when the sliding block 81 is not lifted, under the action of the sliding block spring 82, the sliding block 81 can extrude the limiting strip 83 into the corresponding second clamping groove 92, the fifth guide block spring 85 is compressed, and the limiting generated by the limiting strip 83 and the second clamping groove 92 can indirectly prevent the lifting mechanism 45 from moving upwards; on the other hand, when the slider 81 is lifted, the slider 81 will not extrude the limiting strip 83 any more, the limiting strip 83 can make the fifth guide block 84 move and reset under the action of the fifth guide block spring 85, and then the limiting strip 83 can move towards the sliding cavity 80, the limiting strip 83 is separated from the second clamping groove 92, so that the limiting strip 83 cannot generate limitation with the second clamping groove 92, and the lifting mechanism 45 can move upwards.

The first guide spring 48 is used for buffering the descending of the lifting block 19.

One end of the connecting rod 28 is arranged on the lifting block 19, and the other end of the connecting rod 28 is arranged on the suspension plate 17, so that the lifting block 19 can drive the suspension plate 17 to move up and down through the connecting rod 28; two second guide blocks 24 and two third guide blocks 25 are symmetrically arranged on two sides of the suspension plate 17, the second guide blocks 24 are positioned in the second guide grooves 39, and the third guide blocks 25 are positioned in the third guide grooves 40, so that the suspension plate 17 can drive the second guide blocks 24 and the third guide blocks 25 to move up and down in the corresponding second guide grooves 39 and third guide grooves 40, and meanwhile, the effect of preventing the suspension plate 17 from tilting when moving up and down can be achieved.

The end of the eccentric block 29 having a rounded corner 52 is used to facilitate the movement of the eccentric block 29 into and out of the first engaging groove 34 and the fourth engaging groove 33.

The centrifugal block 29 and the corresponding first clamping groove 34 and fourth guiding groove 33 respectively cooperate to: on one hand, in the process of slowly rotating the lifting winding wheel 20, because the centrifugal force generated by the centrifugal block 29 is small, the centrifugal block 29 cannot slide out of the centrifugal block groove 50 and further cannot enter the first clamping groove 34 or the fourth guide groove 33; on the other hand, in the process of fast rotation of the winding wheel 20 under the action of fast energy release of the spiral spring 21, because the centrifugal force generated by the centrifugal block 29 is large, at this time, the centrifugal block 29 can slide out of the centrifugal block slot 50, and one end of the centrifugal block 29 extending out of the centrifugal block slot 50 is always in contact with the two side cavity surfaces of the first mechanism cavity 70, when the winding wheel 20 drives the centrifugal block 29 to rotate to the positions of the first slot 34 and the fourth slot 33, the centrifugal block 29 is inserted into the gap formed by the top cavity surfaces of the first slot 34 or the fourth slot 31 and the fourth slot 33 under the action of the centrifugal force.

The first wire spring 95 functions to: when the third steel wire rope 93 pulls the first steel wire rope 53, a certain buffering effect can be achieved; in addition, when an emergency occurs, only the third steel wire rope 93 and the first steel wire rope 53 can play a certain role in buffering when the lifting mechanism 45 is pulled, and the third steel wire rope 93 or the first steel wire rope 53 is prevented from being suddenly broken when encountering a sudden impact force.

The second wire spring 96 functions to: when the fourth steel wire rope 94 pulls the second steel wire rope 54, a certain buffering effect can be achieved; in addition, when an emergency occurs, only the fourth steel wire rope 94 and the second steel wire rope 54 can play a certain role in buffering when the lifting mechanism 45 is pulled, so that the fourth steel wire rope 94 or the second steel wire rope 54 is prevented from being suddenly broken when encountering a sudden impact force.

In the invention, the platform winding wheel 13 is connected with the shaft of the motor 10 on the motor 10 through the first shaft 15, so that the motor 10 can drive the platform winding wheel 13 to rotate through the first shaft 15; the hook 16 in the lifting mechanism 45 is matched with the annular hook sleeve 9, so that the hook 16 can hook the annular hook sleeve 9, and the lifting mechanism 45 can drive the bucket rotary table 5 to move up and down through the annular hook sleeve 9 and the platform frame 8; platform arm lock mechanism 7 is installed on lift platform 4, and fill revolving stage 5 is installed on platform arm lock mechanism 7, and the effect of platform arm lock mechanism 7 is so: when the hook 16 in the lifting mechanism 45 does not hook the annular hook sleeve 9, the platform arm locking mechanism 7 can lock the bucket turntable 5 to prevent the bucket turntable 5 from falling; when the hook 16 in the lifting mechanism 45 hooks the annular hook sleeve 9 to move upwards, the platform arm locking mechanism 7 is unlocked to limit the bucket rotary table 5, and then the lifting mechanism 45 can drive the bucket rotary table 5 to move up and down, so that the bucket rotary table 5 is assisted to lift trapped personnel which cannot be rescued at a higher position by the rescue aerial ladder fire truck 2, and the survival probability of the trapped personnel at the higher position is greatly increased.

The specific implementation mode is as follows: when the elevation winding wheel 20 is not rotated, the suspension plate 17 is positioned at the bottom of the rectangular guide hole and the rectangular guide groove 41; when the elevation winding wheel 20 is not lifted, one end of the stopper bar 83 having the rounded corner 52 is inserted into the corresponding second catching groove 92, and the fifth guide spring 85 is compressed.

When a fire disaster occurs in a high building and the bucket rotary table 5 on the aerial ladder fire truck 2 reaches the highest rescue height, one end of a first steel wire rope 53 is installed on a first steel wire rope winding groove 60, one end of a second steel wire rope 54 is installed on a second steel wire rope winding groove 61, and the hook 16 hooks the annular hook sleeve 9; when the motor 10 is started, the motor 10 drives the platform winding wheel 13 to rotate through the first shaft 15, the platform winding wheel 13 winds the first steel wire rope 53 and the second steel wire rope 54, the first steel wire rope 53 wound on the first lifting winding wheel 62 and the second steel wire rope 54 wound on the second lifting winding wheel 63 are slowly released, the first lifting winding wheel 62 and the second lifting winding wheel 63 rotate slowly, and the scroll spring 21 also rotates to store energy along with the lifting winding wheel 20; when the first wire rope 53 wound on the first elevation winding wheel 62 and the second wire rope 54 wound on the second elevation winding wheel 63 are released, the rotation of the elevation winding wheel 20 is stopped and the scroll spring 21 reaches the maximum energy storage state; when the platform winding wheel 13 continues to rotate under the driving of the motor 10, the first wire rope 53 and the second wire rope 54 drive the first lifting winding wheel 62 and the second lifting winding wheel 63 to move upwards, the first lifting winding wheel 62 and the second lifting winding wheel 63 drive the sliding block 81 to move upwards through the fourth shaft 44, when the sliding block 81 moves upwards to the maximum, the fifth guide spring 85 enables the fifth guide 84 to move and reset, the limiting strip 83 can move towards the sliding cavity 80, the limiting strip 83 is separated from the second clamping groove 92, so that the limiting strip 83 cannot limit the position of the second clamping groove 92, and the lifting mechanism 45 can move upwards; under the condition that the first lifting winding wheel 62 and the second lifting winding wheel 63 continue to move upwards, the sliding block 81 can drive the lifting block 19 to move upwards, and the lifting block 19 can drive the bucket rotary table 5 to move upwards through the connecting rod 28, the suspension plate 17, the hook 16, the annular hook sleeve 9 and the platform frame 8; after the bucket turntable 5 rescues the trapped people at the height, the bucket turntable 5 moves downwards under the reverse driving of the motor 10 until the trapped people stop on the platform arm locking mechanism 7, and the trapped people evacuate from the bucket turntable 5, so that the danger is avoided.

During the upward movement of the lifting mechanism 45: when one of the first and third wire ropes 53 and 93 or one of the second and fourth wire ropes 54 and 94 is suddenly broken, taking the first wire rope 53 of the first and third wire ropes 53 and 93 as an example, the first wire rope 53 does not pull the first elevation winding wheel 62 to move up and down any more, at this time, the wrap spring 21 storing the maximum rotational energy is rapidly restored, and the first elevation winding wheel 62 is rapidly rotated; in the process of rapid rotation of the lifting winding wheel 20, because the centrifugal force generated by the centrifugal block 29 is large, at this time, the centrifugal block 29 can slide out of the centrifugal block groove 50, and one end of the centrifugal block 29 extending out of the centrifugal block groove 50 is always in contact with the two side cavity surfaces of the first mechanism cavity 70, when the lifting winding wheel 20 drives the centrifugal block 29 to rotate to the positions of the first clamping groove 34 and the fourth guide groove 33, the centrifugal block 29 is inserted into the gap formed by the top groove surfaces of the first clamping groove 34 or the fourth guide block 31 and the fourth guide groove 33 under the action of the centrifugal force, the first lifting winding wheel 62 is clamped in the first mechanism cavity 70, because the first lifting winding wheel 62 is clamped, the bucket rotary table 5 cannot continue to move upwards and is in a static state, and the bucket rotary table 5 in this state is safe under the combined action of the traction of the second steel wire rope 54 and the clamped first lifting winding wheel 62; the sudden stop of the bucket turntable 5 during the ascent also means that one of the first wire rope 53 or the second wire rope 54 is broken, which facilitates finding potential safety hazards in time.

When the lifting mechanism 45 moves downward: when one of the first and third wire ropes 53 and 93 or one of the second and fourth wire ropes 54 and 94 is suddenly broken in the process of the up-and-down movement of the lifting mechanism 45, taking the example that the first wire rope 53 of the first and third wire ropes 53 and 93 is broken, the first wire rope 53 does not pull the first lifting winding wheel 62 to move up and down any more, at this time, the volute spring 21 storing the maximum rotational energy is rapidly restored, and the first lifting winding wheel 62 is rapidly rotated; in the process of fast rotation of the winding wheel 20, as shown in (a) of fig. 36, since the centrifugal force generated by the centrifugal block 29 is large, at this time, the centrifugal block 29 can slide out of the centrifugal block slot 50, and one end of the centrifugal block 29 extending out of the centrifugal block slot 50 is always in contact with the two side cavity surfaces of the first mechanism cavity 70, as shown in (b) of fig. 36, when the winding wheel 20 rotates the centrifugal block 29 to the positions of the first engaging groove 34 and the fourth guiding groove 33, the centrifugal block 29 is inserted into the space formed by the first engaging groove 34 or the fourth guiding groove 31 and the top cavity surface of the fourth guiding groove 33 by the centrifugal force, as shown in (c) of fig. 36, under the sliding of the fourth guiding groove 31, the centrifugal block 29 of the first winding wheel 62 on the fourth guiding groove 31 moves downward, so that the first winding wheel 62 continues to rotate, as shown in (d) of fig. 36, and because the rotating table 5 is in the process of moving downward, the centrifugal block 29 of the first lifting winding wheel 62 which continues to rotate collides with the top surfaces of the first clamping groove 34 and the fourth guide block 31 below the centrifugal block in sequence, so that a part of the weight of the bucket rotary table 5 is distributed, the buffer function is achieved, and the second steel wire rope 54 which is not broken is protected; the bucket turntable 5 is safely dropped. In the above process, the initial rotation of the first winding wheel 62 is driven by the spiral spring 21, and the subsequent rotation is shifted by the first engaging groove 34 and the fourth guiding groove 33, the number of rotation turns of the first winding wheel 62 in the subsequent rotation must be greater than the number of deformation turns of the spiral spring 21, and the spiral spring 21 must be damaged, so that the damaged spiral spring 21 needs to be replaced after the bucket table 5 falls to the platform arm lock mechanism 7.

When the lifting mechanism 45 moves up or down, when one of the first and third wire ropes 53 and 93 and one of the second and fourth wire ropes 54 and 94 are simultaneously broken, the spiral spring 21 storing the maximum rotational energy is rapidly restored, and the first and second lifting winding wheels 62 and 63 are rapidly rotated; in the process of fast rotation of the lifting winding wheel 20, because the centrifugal force generated by the centrifugal block 29 is large, at this time, the centrifugal block 29 can slide out from the centrifugal block groove 50, and one end of the centrifugal block 29 extending out of the centrifugal block groove 50 is always in contact with the two side cavity surfaces of the first mechanism cavity 70, when the lifting winding wheel 20 drives the centrifugal block 29 to rotate to the positions of the first slot 34 and the fourth slot 33, the centrifugal block 29 is inserted into the gap formed by the top groove surfaces of the first slot 34 or the fourth slot 31 and the fourth slot 33 under the action of the centrifugal force, under the action of the sliding of the fourth slot 31, the centrifugal block 29 on the fourth slot 31 of the first lifting winding wheel 62 and the second lifting winding wheel 63 moves downwards, so that the first lifting winding wheel 62 and the second lifting winding wheel 63 continue to rotate, and at the same time, the traction of the first steel wire rope 53 and the second steel rope 54 is absent, and the bucket 5 is in the downward moving process, the centrifugal blocks 29 of the first lifting winding wheel 62 and the second lifting winding wheel 63 which continue to rotate will sequentially collide with the spaces between the top surfaces of the first clamping groove 34 and the fourth clamping groove 31 below the centrifugal blocks, so as to play a role in buffering and decelerating. In addition, when one of the first wire rope 53 and the third wire rope 93 and one of the second wire rope 54 and the fourth wire rope 94 are simultaneously broken, the first lifting winding wheel 62 and the second lifting winding wheel 63 do not drive the sliding block 81 to move upwards to the maximum position any more through the fourth shaft 44, at this time, under the action of the sliding block spring 82, the sliding block 81 moves downwards to reset, and then under the extrusion of the sliding block 81, the limiting strip 83 extends out of the total limiting strip hole to be contacted with the side groove surface of the first guide groove 37; when the lifting mechanism 45 descends to a position where the limiting strip 83 is opposite to the corresponding second clamping groove 92, the limiting strip 83 is inserted into the corresponding second clamping groove 92 under the extrusion of the sliding block 81; because the lifting mechanism 45 continuously falls and one end of the limit strip 83 has the effect of the round angle 52, the limit strip 83 is separated from the corresponding second clamping groove 92 again, at the moment, the limit strip 83 extrudes the sliding block 81 in a small range, and the sliding block 81 moves upwards in a small range; when the lifting mechanism 45 continues to descend to a position where the limiting strip 83 is opposite to another corresponding second clamping groove 92, the movement of the limiting strip 83 repeats the above process until the lifting mechanism 45 falls to a position where the lifting mechanism 45 is not pulled up. The design that the limiting block enters and exits the second clamping groove 92 and the centrifugal block 29 enters and exits the first clamping groove 34 and the fourth guide groove 33 finally ensures that when the lifting mechanism 45 falls to the minimum, the trapped person on the bucket turntable 5 can bear slight falling impact, and the situation that the trapped person is injured again when encountering emergency is prevented. In the above process, the initial rotation of the first lifting winding wheel 62 and the second lifting winding wheel 63 is driven by the scroll spring 21, and the subsequent rotation is shifted by the first engaging groove 34 and the fourth guiding groove 33, the number of rotation turns of the first lifting winding wheel 62 and the second lifting winding wheel 63 in the subsequent rotation must be greater than the number of deformation turns of the scroll spring 21, and the scroll spring 21 must be damaged, so that the damaged scroll spring 21 needs to be replaced after the bucket table 5 falls to the platform arm locking mechanism 7.

In conclusion, the invention has the main beneficial effects that: according to the aerial ladder fire truck, the lifting mechanism 45 can drive the bucket rotary table 5 to continuously move upwards under the driving of the motor 10 so as to rescue trapped people which cannot be rescued by the aerial ladder fire truck 2 at a higher position, and meanwhile, when the auxiliary lifting mechanism 6 meets an emergency, the lifting mechanism 45 can still play a basic role in dealing with the emergency, so that the trapped people are prevented from being injured again when meeting the emergency. The invention has simple and safe structure and better practical effect.

Claims

1. The utility model provides a high building safety assists hoisting device based on aerial ladder fire engine which characterized in that: the device comprises a shell, a first fixed pulley, a second fixed pulley, a fourth guide block spring, a fourth guide groove, a first clamping groove, a third fixed pulley, a fourth fixed pulley, a first guide block spring, a rectangular guide hole, a second guide groove, a third guide groove, a rectangular guide groove, a second shaft, a third shaft, a first steel wire rope, a second steel wire rope, a third steel wire rope, a fourth steel wire rope, a first steel wire rope spring, a second steel wire rope spring and a lifting mechanism, wherein the shell is arranged on a wall; the shell is composed of a first plate, a second plate, a third plate, a fourth plate and a top plate; the shell is provided with a clapboard; the clapboard is positioned between the first plate and the third plate and is parallel to the first plate; a gap is formed between the partition plate and the top plate; a first mechanism cavity is defined by the first plate, the second plate, the partition plate and the fourth plate; a second mechanism cavity is defined by the second plate, the third plate, the fourth plate and the partition plate; one end of the second shaft is arranged on the fourth plate, and the other end of the second shaft is arranged on the second plate; the second shaft is positioned in the first mechanism cavity and close to the top plate; a first fixed pulley and a third fixed pulley are arranged on the outer circular surface of the second shaft; the first fixed pulley is close to the fourth plate, and the third fixed pulley is close to the second plate; one end of the third shaft is arranged on the fourth plate, and the other end of the third shaft is arranged on the second plate; the third shaft is positioned in the second mechanism cavity and close to the top plate; the second shaft and the third shaft are at equal height positions; a second fixed pulley and a fourth fixed pulley are arranged on the outer circular surface of the third shaft; the second fixed pulley is close to the fourth plate, and the fourth fixed pulley is close to the second plate;

a rectangular guide hole is formed in the middle of the fourth plate of the first mechanism cavity along the vertical direction; a rectangular guide groove is formed in the middle of the second plate of the first mechanism cavity along the vertical direction; the rectangular guide hole is opposite to the rectangular guide groove in position, the length of the rectangular guide hole is equal to that of the rectangular guide groove, and the width of the rectangular guide hole is equal to that of the rectangular guide groove; two second guide grooves are symmetrically formed in two sides of the rectangular guide hole; two third guide grooves are symmetrically formed in two sides of the rectangular guide groove; two surfaces of the partition board opposite to the first board are provided with first guide grooves; a plurality of first clamping grooves distributed in the vertical direction are symmetrically formed in the plate surface of the partition plate provided with the first guide groove relative to the first guide groove; a plurality of fourth guide grooves distributed along the vertical direction are symmetrically formed on the plate surface of the first plate provided with the first guide grooves relative to the first guide grooves; each first clamping groove corresponds to each fourth guide groove one by one; a fourth guide block is arranged in the fourth guide groove; one end of a fourth guide block spring is arranged on the fourth guide block, and the other end of the fourth guide block spring is arranged on the bottom groove surface of the fourth guide groove; the fourth guide block slides in the fourth guide groove; the lifting mechanism is arranged in the first mechanism cavity; a plurality of second clamping grooves are uniformly formed in the side groove surface of each first guide groove along the vertical direction; the lifting mechanism is respectively matched with the rectangular guide hole, the rectangular guide groove, the first guide groove, the second guide groove, the third guide groove, the fourth guide groove, the second clamping groove and the first clamping groove;

the lifting mechanism comprises a hook, a suspension plate, a lifting block, a lifting winding wheel, a steel wire rope winding groove, a volute spiral spring, a first fixed block, a first guide block, a second guide block, a third guide block, a connecting rod, a centrifugal block spring, a fourth shaft, a second fixed block, a third fixed block, a centrifugal block groove, a sliding cavity, a sliding block spring, a limiting strip, a fifth guide block spring, a sliding hole, a first limiting strip hole, a second limiting strip hole, a third limiting strip hole, a fifth guide groove, an oblique angle and a second clamping groove, wherein the lifting block is provided with the sliding cavity; two first limiting strip holes are symmetrically formed in one group of symmetrical side faces of the sliding cavity, and two sliding holes are symmetrically formed in the other group of symmetrical side faces of the sliding cavity; the sliding block is arranged in the sliding cavity; one end of the sliding block spring is arranged on the sliding block, and the other end of the sliding block spring is arranged on the bottom cavity surface of the sliding cavity; the sliding block slides in the sliding cavity through a sliding block spring; two fourth shafts are symmetrically arranged on two sides of the sliding block; the fourth shaft is positioned in the corresponding sliding hole; one end of the fourth shaft, which is not connected with the sliding block, penetrates through the sliding hole and is provided with a lifting winding wheel; two side surfaces of the sliding block, which are not provided with the fourth shaft, are provided with oblique angles; a volute spiral spring is nested on each fourth shaft; one end of the scroll spring is arranged on the side surface of the lifting winding wheel through a third fixed block, and the other end of the scroll spring is arranged on the side surface of the lifting block through a second fixed block; the outer circular surface of one end of the lifting winding wheel close to the volute spiral spring is provided with a steel wire rope winding groove; two centrifugal block grooves are symmetrically formed in the outer circular surface of the lifting winding wheel; the centrifugal block is arranged in the centrifugal block groove; one end of the centrifugal block spring is arranged on the centrifugal block, and the other end of the centrifugal block spring is arranged on the bottom groove surface of the centrifugal block groove; the centrifugal block slides in the centrifugal block groove through a centrifugal block spring; two first fixed blocks are symmetrically arranged on the two side surfaces of the lifting block, which are provided with the first limiting strip holes; each first fixing block is provided with a first limiting strip hole; one end of each first fixed block, which is not connected with the lifting block, is provided with a first guide block; each first guide block is provided with a third limiting strip hole; two fifth guide grooves are symmetrically formed in two sides of each third limiting strip hole; each first limiting strip hole is communicated with the corresponding second limiting strip hole and the corresponding third limiting strip hole;

for any one of the two first limiting strip holes, the first limiting strip hole, the corresponding second limiting strip hole and the corresponding third limiting strip hole form a total limiting strip hole; one end of the limiting strip is provided with an oblique angle, and the other end of the limiting strip is provided with a round angle; two fifth guide blocks are symmetrically arranged on two sides of the limiting strip; the limiting strip is arranged in the total limiting strip hole through the matching of the fifth guide block and the fifth guide groove; a fifth guide block spring is arranged between the fifth guide block and the groove surface of the fifth guide groove; the fifth guide block spring is positioned in the fifth guide groove; the limiting strip slides in the total limiting strip hole through the fifth guide block;

the lower plate surface of the lifting block is provided with a connecting rod; one end of the connecting rod, which is not connected with the lifting block, is provided with a suspension plate; the upper plate surface of the suspension plate is vertical to the side surface of the lifting winding wheel; a hook is arranged on the lower plate surface at one end of the hanging plate, and two third guide blocks are symmetrically arranged on two side surfaces at the other end of the hanging plate; two second guide blocks are symmetrically arranged on two side surfaces of the middle end of the suspension plate;

the distance between the second guide block and the third guide block on the same side is equal to the distance between the second guide groove and the third guide groove; one end of the suspension plate, which is provided with the third guide block, is positioned in the rectangular guide groove and slides in the rectangular guide groove, and the other end of the suspension plate penetrates through the rectangular guide hole and slides in the rectangular guide hole; the third guide blocks are positioned in the corresponding third guide grooves and slide in the third guide grooves; the second guide blocks are positioned in the corresponding second guide grooves and slide in the second guide grooves; the first guide blocks are positioned in the corresponding first guide grooves; one end of the first guide block spring, which is not connected with the first guide block, is arranged on the lower groove surface of the first guide groove, and the first guide block slides in the first guide groove through the first guide block spring; the centrifugal block is respectively matched with the corresponding fourth guide groove and the first clamping groove;

the lifting winding wheel close to the second guide block is named as a first lifting winding wheel; the lifting winding wheel close to the third guide block is named as a second lifting winding wheel; the first lifting winding wheel, the first fixed pulley and the second fixed pulley are positioned on the same plane; the second lifting winding wheel, the third fixed pulley and the fourth fixed pulley are positioned on the same plane;

the oblique angle on the limiting strip is matched with the oblique angle on the sliding block; one end of the limiting strip with a round corner is matched with the corresponding second clamping groove;

one end of the first steel wire rope is arranged on the steel wire rope winding groove of the first lifting winding wheel and wound by a circle of the steel wire rope winding groove of the first lifting winding wheel, and the other end of the first steel wire rope is provided with a first steel wire rope spring; one end of the third steel wire rope is connected with one end of the first steel wire rope spring, which is not connected with the first steel wire rope, and the other end of the third steel wire rope is connected with a power source of the aerial ladder fire truck through the first fixed pulley and the second fixed pulley;

one end of a second steel wire rope is arranged on the steel wire rope winding groove of the second lifting winding wheel and wound by a circle of the steel wire rope winding groove of the second lifting winding wheel, and the other end of the second steel wire rope is provided with a second steel wire rope spring; one end of a fourth steel wire rope is connected with one end of the second steel wire rope spring, which is not connected with the second steel wire rope, and the other end of the fourth steel wire rope is connected with a power source of the aerial ladder fire truck through a third fixed pulley and a fourth fixed pulley;

when the fourth guide block spring is not compressed, the distance between the fourth guide block and the top groove surface of the fourth guide groove is equal to the width of the centrifugal block;

when the lifting block is not pulled up, the suspension plate is positioned at the bottoms of the rectangular guide hole and the rectangular guide groove.

2. The aerial ladder fire truck-based high-rise safety auxiliary lifting device as claimed in claim 1, wherein: the end of the centrifugal block, which is not connected with the centrifugal block spring, is provided with a fillet.

3. The aerial ladder fire truck-based high-rise safety auxiliary lifting device as claimed in claim 1, wherein: when the lifting winding wheel is not pulled up, the slider spring is in a stretching state; the fifth guide block spring is in a compressed state; one end of the limiting strip with a round corner is inserted into the corresponding second clamping groove.

4. The aerial ladder fire truck-based high-rise safety auxiliary lifting device as claimed in claim 1, wherein: when the lifting winding wheel is not pulled up, the sliding block cannot move upwards relative to the lifting block under the extrusion of the two limiting strips.