CN116281679A

CN116281679A - Lorry-mounted crane and stretching system thereof

Info

Publication number: CN116281679A
Application number: CN202310562032.XA
Authority: CN
Inventors: 彭铁; 朱增光; 徐新辉; 王家福
Original assignee: Sichuan Chuanyun Heavy Industry Machinery Co ltd
Current assignee: Sichuan Chuanyun Heavy Industry Machinery Co ltd
Priority date: 2023-05-18
Filing date: 2023-05-18
Publication date: 2023-06-23
Anticipated expiration: 2043-05-18
Also published as: CN116281679B

Abstract

The invention provides a lorry-mounted crane and an extension system thereof, which comprise a plurality of sections of telescopic arms, wherein a middle column is arranged at the mounting end of each section of telescopic arm, a steel wire rope detection mechanism is fixedly arranged at the bottom of each section of telescopic arm, a rotating arm is arranged at the bottom of each middle column, a base is rotatably arranged at the bottom of each rotating arm, two ends of each base are fixedly provided with a double-extension supporting mechanism, two double-extension supporting mechanisms are respectively provided with a backing plate mechanism, and a gravity center deviation detection mechanism is fixedly arranged at the bottom of each base. The invention can increase the contact area of the double-extension supporting mechanism and the ground when in use in rainy days by the arranged backing plate mechanism, reduce the pressure intensity, avoid the pressure intensity from being concentrated and increasing to cause the double-extension supporting mechanism to sink into the soil at one time, the whole gravity center is prevented from shifting, the safety of the whole use is improved, and the cushion plate mechanism is not unfolded and does not influence the whole operation when the device is used on a non-rainy day or a muddy field.

Description

Lorry-mounted crane and stretching system thereof

Technical Field

The invention relates to the technical field of lorry-mounted cranes, in particular to a lorry-mounted crane and an extension system thereof.

Background

The lorry-mounted crane is equipment for lifting, turning and lifting cargoes through a hydraulic lifting and telescoping system and is usually assembled on a truck. The truck crane can be loaded with various grabbing auxiliary tools, such as a wood clamping grab bucket, a hanging basket, a brick clamping clamp, a drilling tool and the like, so as to realize multi-scene operation. The system is widely used in stations, warehouses, wharfs, construction sites, field rescue and other places. The truck-mounted crane is well seen by the market due to the flexible and multipurpose characteristics, and has great market potential in the future;

the existing lorry-mounted crane has the defects that the existing lorry-mounted crane is difficult to work on a soft or muddy field, so that the lorry-mounted crane is difficult to perform outdoor operation in rainy days, mainly because the lorry-mounted crane needs to be in contact with the ground through the supporting legs and works on a softer or muddy field, the supporting legs are small in contact area with the ground and are easy to sink into the soil, the integral gravity center is offset, the side turning risk is increased, the integrity of a steel wire rope cannot be detected in the hoisting process, the integrity of the steel wire rope cannot be judged in advance, the phenomenon of breakage of the steel wire rope frequently occurs, the potential safety hazard is large, the working amplitude is small in use, and the requirement for large-amplitude work is difficult to be met.

Disclosure of Invention

(one) solving the technical problems

Aiming at the defects of the prior art, the invention provides the lorry-mounted crane and the stretching system thereof, and solves the problems that the existing lorry-mounted crane is difficult to perform outdoor operation in rainy days, cannot judge the integrity of a steel wire rope and has small working range.

(II) technical scheme

In order to achieve the above purpose, the invention is realized by the following technical scheme: the telescopic arm is provided with a middle column at the mounting end, a steel wire rope detection mechanism is fixedly arranged at the bottom of the multi-section telescopic arm, a rotating arm is arranged at the bottom of the middle column, a base is rotatably arranged at the bottom of the rotating arm, two ends of the base are fixedly provided with double-extension supporting mechanisms, two double-extension supporting mechanisms are provided with backing plate mechanisms, and a gravity center deviation detection mechanism is fixedly arranged at the bottom of the base;

the multi-section telescopic boom comprises a plurality of telescopic boom bodies, the two adjacent telescopic boom bodies are in limit sliding connection, the top of the telescopic boom body is fixedly connected with a first fixed block, the top of the telescopic boom body is fixedly connected with a second fixed block, the top of the telescopic boom body is fixedly connected with a supporting frame, the middle of the telescopic boom body is fixedly connected with a plurality of supporting frames, a first oil cylinder is fixedly installed between the two adjacent supporting frames, between the second fixed block and the adjacent supporting frame and between the first fixed block and the adjacent supporting frame, the outer surface of the telescopic boom body is fixedly connected with a connecting seat, and the outer surface of the connecting seat is rotationally connected with a first connecting rod;

the middle column comprises a column body, the column body is rotationally connected with the connecting seat, a second connecting rod is rotationally connected between one side of the outer surface of the column body and the first connecting rod, a second oil cylinder is rotationally connected inside the column body, the movable end of the second oil cylinder is rotationally connected with the connecting seat, a first connecting part is arranged at the bottom of the column body, and a third connecting rod is rotationally connected with two sides of the outer surface of the column body;

the rotary arm comprises an arm body, a connecting frame is connected to the two sides of the outer surface of the arm body in a rotating mode, the connecting frame is connected with a third connecting rod in a rotating mode, a third oil cylinder is connected to the inside of the arm body in a rotating mode, the movable end of the third oil cylinder is connected with the connecting frame in a rotating mode, a second connecting portion is arranged at the top of the arm body, the second connecting portion is connected with the first connecting portion in a rotating mode, a connecting plate is fixedly connected to the bottom of the arm body, two hydraulic rotary speed reducers penetrate through the bottom of the connecting plate in a symmetrical mode, and gears are fixedly connected to the output ends of the two hydraulic rotary speed reducers;

the base comprises a base, an annular plate is fixedly connected to the top of the base, annular teeth meshed with the gears are fixedly connected to the top of the annular plate, and the annular teeth are rotationally connected with the connecting plate.

Preferably, the wire rope detection mechanism comprises a shell, the shell is fixedly connected with the adjacent telescopic boom body, the CCD visual detection cameras are fixedly installed at the inner top and the inner bottom of the shell, and two wire rope guide wheels are rotatably connected in the shell.

Preferably, the two dual-extension supporting mechanisms comprise fixed arms, the fixed arms are fixedly connected with the base, one ends of the fixed arms are inserted into and are slidably connected with movable arms, a fourth oil cylinder is fixedly arranged in the fixed arms, the movable ends of the fourth oil cylinder are fixedly connected with the movable arms, the bottoms of the movable arms are fixedly connected with supporting oil cylinders, and supporting seats are fixedly arranged at the movable ends of the supporting oil cylinders.

Preferably, the two backing plate mechanisms comprise pushing oil cylinders, the pushing oil cylinders are fixedly arranged at the bottoms of the fixed arms, movable ends of the pushing oil cylinders are rotationally connected with fourth connecting rods, movable ends of the fourth connecting rods are rotationally connected with elastic telescopic rods, fixed ends of the elastic telescopic rods are rotationally connected with the surfaces of fixed cylinder bodies of the supporting oil cylinders, and movable ends of the elastic telescopic rods are fixedly connected with backing plate bodies.

Preferably, the elastic telescopic rod comprises a fixed cylinder, the fixed cylinder is rotationally connected with the supporting oil cylinder and the fourth connecting rod, a movable plate is rotationally connected in the fixed cylinder, a square rod is fixedly connected to one side of the outer surface of the movable plate, the square rod penetrates through the fixed cylinder and is in sliding connection with the fixed cylinder, the square rod is fixedly connected with the base plate body, and a spring fixedly connected with the movable plate is sleeved on the outer surface of the square rod.

Preferably, the gravity center offset detection mechanism comprises a shell, the shell is fixedly connected with the base, pressure sensors are symmetrically and fixedly arranged on the inner walls of two sides of the shell, transverse plates are fixedly connected to the detection ends of the pressure sensors, and balancing weights are abutted between the transverse plates.

Preferably, the top of the column body is fixedly connected with an oil pipe bracket.

Preferably, a ladder is fixedly connected to one side of the outer surface of the arm body, a cockpit is fixedly connected to one side of the outer surface of the arm body, and a first alarm and a second alarm are fixedly installed in the cockpit.

Preferably, the bottom symmetry fixedly connected with two U type screw rods of base, two the surface of U type screw rod has all cup jointed the locking seat, and two the lock nut has all been cup jointed to U type screw rod surface.

The extension system of the lorry-mounted crane comprises a controller, a pump station and the lorry-mounted crane, wherein the controller and the pump station are respectively connected with the lorry-mounted crane.

Working principle: the controller is matched with the pump station to realize the extension of the lorry crane, and the vehicle body of the lorry crane can be provided with the double-extension supporting mechanism and the backing plate mechanism so as to be matched with the double-extension supporting mechanism and the backing plate mechanism for use, and when the lorry crane is used in rainy days, the double-extension supporting mechanism and the backing plate mechanism are firstly extended, and the following steps are specifically adopted: the fourth oil cylinder drives the movable arm to move along the fixed arm, so that the movable arm is far away from the base until the movable arm reaches a required position, then the oil cylinder is pushed to push the fourth connecting rod to move, so that the elastic telescopic rod rotates by taking the rotation connecting part of the elastic telescopic rod and the support oil cylinder as a center until the base plate is positioned right below the support seat, then the support oil cylinder drives the support seat to descend, the support seat drives the base plate body to descend until the base plate body contacts with the ground and then integrally supports the lorry crane, and the base plate body drives the square rod to descend while descending, so that the spring is extruded through the movable plate; then, according to the requirement, changing the lifting distance and direction, starting a hydraulic rotary speed reducer, a first oil cylinder, a second oil cylinder and a third oil cylinder, wherein the hydraulic rotary speed reducer drives a gear to rotate, so that an arm body rotates along ring teeth, a plurality of sections of telescopic arms are driven to rotate through a middle column, then the third oil cylinder stretches, so that the angle between the column body and a rotating arm is changed, and meanwhile, the second oil cylinder stretches, so that the angle between the column body and the plurality of sections of telescopic arms is changed until the plurality of sections of telescopic arms reach the required use angle, and then the first oil cylinder stretches, and two adjacent telescopic arm bodies are enabled to be expanded in a limiting mode through the cooperation of an adjacent supporting frame, a first fixed block and a second fixed block until the length of the plurality of sections of telescopic arms reaches the required value; then hoisting is started, an operator controls the steel wire rope to be released through a crane control mechanism, the steel wire rope passes through two steel wire rope guide wheels when being released, the steel wire rope passes through two CCD visual detection cameras, the CCD visual detection cameras convey images to an image processor in a controller for image processing, then whether the appearance of the steel wire rope is damaged or not is judged, and if the appearance of the steel wire rope is damaged, the controller controls a first alarm to make a sound, so that the operator is reminded of timely responding, the probability of breakage of the steel wire rope is reduced, and the safety of integral use is improved; when the pressure sensor is used, the balancing weight can deviate along with the deviation of the center of the lorry-mounted crane, so that the pressure sensor at one end of the balancing weight which inclines downwards detects the increase of the pressure value, when the pressure value is increased to a set value, the pressure sensor sends a signal to the controller, and the controller controls the second alarm to sound, thereby improving the timely response of operators and reducing the side turning risk; after the use is finished, the multisection telescopic boom, the center post and the rotating arm are reset, the double-extension supporting mechanism and the backing plate mechanism are reset, wherein the double-extension supporting mechanism and the backing plate mechanism drive the supporting seat to rise to a designated position when being reset, the backing plate body loses the downward pushing force of the supporting seat, the spring can push the movable plate to reset, then the backing plate body is driven to rise through the square rod, then the pushing oil cylinder drives the elastic telescopic rod and the backing plate body to reset through the fourth connecting rod, and then the fourth oil cylinder is matched with the pushing oil cylinder, so that the double-extension supporting mechanism and the backing plate mechanism are reset completely.

(III) beneficial effects

The invention provides a lorry-mounted crane and an extension system thereof.

The beneficial effects are as follows:

1. the invention can increase the contact area of the double-extension supporting mechanism and the ground when in use in rainy days by the arranged backing plate mechanism, reduce the pressure intensity, avoid the pressure intensity from being concentrated and increasing to cause the double-extension supporting mechanism to sink into the soil at one time, the whole gravity center is prevented from shifting, the safety of the whole use is improved, and the cushion plate mechanism is not unfolded and does not influence the whole operation when the device is used on a non-rainy day or a muddy field.

2. According to the invention, through the arranged steel wire rope detection mechanism and the CCD visual detection of the integrity of the steel wire rope, early warning can be performed in advance, the phenomenon of breakage of the steel wire rope in the using process is avoided, and the overall safety is further improved.

3. According to the invention, through the arranged gravity center deviation detection mechanism, the whole gravity center deviation amount can be detected, and when the gravity center deviation reaches the set value, operators can be timely reminded to make countermeasures, and the rollover risk is reduced.

4. According to the invention, through the multi-section telescopic arm, the middle column, the rotary arm and the base, the whole use range can be increased, the requirement of large-amplitude work is met, and the whole use range is increased.

Drawings

FIG. 1 is a perspective view of a truck mounted crane and its extension system;

FIG. 2 is a schematic diagram of a dual-extension support mechanism of a truck crane and its extension system;

FIG. 3 is a perspective view of a multi-section telescopic boom in a truck crane and its extension;

FIG. 4 is a cross-sectional view of a wire rope detection mechanism in a truck mounted crane and its extension system;

FIG. 5 is a perspective view of a center pillar of a truck mounted crane and its extension;

FIG. 6 is a partial exploded view of a swing arm of a truck mounted crane and its extension system;

FIG. 7 is a partial exploded view of a base of a truck mounted crane and its extension;

FIG. 8 is a cross-sectional view of a center of gravity shift detection mechanism in a truck crane and its extension system;

FIG. 9 is a cross-sectional view of an elastic telescoping rod in a truck crane and its extension;

FIG. 10 is a schematic illustration of a truck mounted crane and its extension system wherein the cab is coupled to the ladder;

FIG. 11 is an enlarged view of the truck mounted crane and its extension at A in FIG. 1;

FIG. 12 is an enlarged view of the truck mounted crane and its extension at B in FIG. 1;

FIG. 13 is a schematic diagram of the installation of a center of gravity shift detection mechanism in a truck mounted crane and its extension system.

1, a plurality of telescopic arms; 11. a telescopic arm body; 12. a second fixed block; 13. a support frame; 14. a first cylinder; 15. a first fixed block; 16. a connecting seat; 17. a first link; 2. a wire rope detection mechanism; 21. a housing; 22. wire rope guide wheels; 23. CCD visual detection camera; 3. a center column; 31. an oil pipe bracket; 32. a column body; 33. a second link; 34. a second cylinder; 35. a third link; 36. a first connection portion; 4. a rotating arm; 41. a cockpit; 42. a ladder; 43. an arm body; 44. a third cylinder; 45. a first alarm; 46. a second alarm; 47. a gear; 48. a connecting frame; 49. a second connecting portion; 410. a connecting plate; 411. a hydraulic slewing reducer; 5. a base; 51. a base; 52. a U-shaped screw; 53. a locking seat; 54. an annular plate; 55. ring teeth; 6. a double-extension supporting mechanism; 61. a fixed arm; 62. a movable arm; 63. a support cylinder; 64. a support base; 7. a backing plate mechanism; 71. an elastic telescopic rod; 711. a movable plate; 712. a fixed cylinder; 713. a spring; 714. square rods; 72. a pad body; 73. pushing the oil cylinder; 74. a fourth link; 8. a center of gravity shift detection mechanism; 81. a cross plate; 82. balancing weight; 83. a housing; 84. a pressure sensor.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1-13, an embodiment of the present invention provides a lorry-mounted crane and an extension system thereof, which includes a multi-section telescopic arm 1, a center pillar 3 is mounted at a mounting end of the multi-section telescopic arm 1, a steel wire rope detection mechanism 2 is fixedly mounted at a bottom of the multi-section telescopic arm 1, a rotating arm 4 is mounted at a bottom of the center pillar 3, a base 5 is rotatably mounted at a bottom of the rotating arm 4, two dual-extension support mechanisms 6 are fixedly mounted at two ends of the base 5, a backing plate mechanism 7 is mounted at two dual-extension support mechanisms 6, and a gravity center offset detection mechanism 8 is fixedly mounted at a bottom of the base 5.

The whole body of the lorry crane is fixedly arranged on a vehicle body in use, the double-extension supporting mechanism 6 and the backing plate mechanism 7 can be also arranged on the vehicle body of the lorry crane, the backing plate mechanism 7 can increase the contact area between the double-extension supporting mechanism 6 and the ground in use, the pressure intensity between the double-extension supporting mechanism 6 and the ground is reduced, the double-extension supporting mechanism 6 can integrally prop up the lorry crane, then the center post 3, the rotating arm 4 and the base 5 are matched, the use angle and the use direction of the multi-section telescopic arm 1 can be changed, the multi-section telescopic arm 1 can control the hoisting distance, the steel wire rope detection mechanism 2 can detect the surface integrity of the steel wire rope in hoisting, the phenomenon that the steel wire rope breaks in the use process is avoided, the whole safety is improved, the gravity center offset detection mechanism 8 can detect the whole gravity center offset, and when the gravity center is offset to a set value, operators can be timely reminded to respond, and the rollover risk is reduced.

The multisection telescopic boom 1 includes a plurality of telescopic boom bodies 11, and spacing sliding connection between two adjacent telescopic boom bodies 11, the top fixedly connected with first fixed block 15 of single telescopic boom body 11 in the leftmost, the top fixedly connected with second fixed block 12 of single telescopic boom body 11 in the rightmost, the top of a plurality of telescopic boom bodies 11 in the centre is all fixedly connected with support frame 13, between two adjacent support frames 13, between second fixed block 12 and the adjacent support frame 13 and between first fixed block 15 and the adjacent support frame 13 common fixed mounting have first hydro-cylinder 14, the surface fixedly connected with connecting seat 16 of single telescopic boom body 11 in the rightmost, the surface rotation of connecting seat 16 is connected with first connecting rod 17.

The first oil cylinder 14 stretches, and is matched with the adjacent support frame 13, the first fixing block 15 and the second fixing block 12, so that the adjacent two telescopic boom bodies 11 are limited and unfolded until the length of the multi-section telescopic boom 1 reaches a required value.

Wherein, the arrangement of the connecting seat 16 is favorable for the rotation connection of the middle column 3 and the multi-section telescopic arm 1.

The middle column 3 comprises a column body 32, the column body 32 is rotationally connected with the connecting seat 16, a second connecting rod 33 is rotationally connected between one side of the outer surface of the column body 32 and the first connecting rod 17, a second oil cylinder 34 is rotationally connected inside the column body 32, a movable end of the second oil cylinder 34 is rotationally connected with the connecting seat 16, a first connecting part 36 is arranged at the bottom of the column body 32, and a third connecting rod 35 is rotationally connected with two sides of the outer surface of the column body 32.

The second cylinder 34 can change the angle between the multi-section telescopic arm 1 and the column body 32 when being extended.

The swinging boom 4 all includes arm body 43, the surface both sides of arm body 43 rotate jointly and are connected with link 48, and rotate between link 48 and the third connecting rod 35 and be connected, the inside of arm body 43 rotates and is connected with third hydro-cylinder 44, and rotate between the expansion end of third hydro-cylinder 44 and the link 48 and be connected, the top of arm body 43 is equipped with second connecting portion 49, and rotate between second connecting portion 49 and the first connecting portion 36 and be connected, the bottom fixedly connected with connecting plate 410 of arm body 43, the bottom symmetry of connecting plate 410 is fixed to run through and is had two hydraulic slewing reducer 411, the equal fixedly connected with gear 47 of output of two hydraulic slewing reducer 411.

The third cylinder 44 can change the angle between the column body 32 and the arm body 43 when extended.

The base 5 comprises a base 51, an annular plate 54 is fixedly connected to the top of the base 51, annular teeth 55 meshed with the gear 47 are fixedly connected to the top of the annular plate 54, and the annular teeth 55 are rotatably connected with the connecting plate 410.

The base 51 is a foundation of the connection part of the crane and the vehicle body, is beneficial to the installation of the crane, and the ring gear 55 is matched with the gear 47 in use, so that the rotating arm 4 can be driven to rotate on the base 5.

As shown in fig. 4, the wire rope detection mechanism 2 includes a housing 21, and a CCD vision detection camera 23 is fixedly installed at the inner top and the inner bottom of the housing 21 fixedly connected between the housing 21 and the adjacent telescopic arm body 11, and two wire rope guide wheels 22 are rotatably connected in the housing 21.

When the steel wire rope is released, the steel wire rope passes through the two steel wire rope guide wheels 22, so that the steel wire rope passes through the two CCD visual detection cameras 23, the CCD visual detection cameras 23 convey images to an image processor in the controller for image processing, and then whether the appearance of the steel wire rope is damaged is judged.

The CCD visual detection is that the CCD visual detection camera 23 is used for collecting image data at the front end, analysis and comparison are carried out through a deep learning algorithm at the rear end, and the next operation is carried out according to an instruction of 'NG' or 'OK' given by the system.

As shown in fig. 2 and 7, the two dual-extension supporting mechanisms 6 each comprise a fixed arm 61, the fixed arms 61 are fixedly connected with the base 51, one ends of the fixed arms 61 are inserted into and slidably connected with movable arms 62, a fourth oil cylinder is fixedly installed in the fixed arms 61, the movable ends of the fourth oil cylinder are fixedly connected with the movable arms 62, the bottoms of the movable arms 62 are fixedly connected with supporting oil cylinders 63, and supporting seats 64 are fixedly installed at the movable ends of the supporting oil cylinders 63.

The fourth cylinder pushes the movable arm 62 to move, so that the movable arm 62 extends along the fixed arm 61, and the supporting cylinder 63 pushes the supporting seat 64 to descend, thereby being beneficial to supporting the whole lorry-mounted crane.

Wherein, the fixed arm 61 and the movable arm 62 are in sliding connection, so that the fixed arm 61 has a limiting effect on the movable arm 62, and the moving stability of the movable arm 62 is ensured.

As shown in fig. 2 and 9, the two pad mechanisms 7 each include a push cylinder 73, the push cylinders 73 are fixedly mounted at the bottoms of the fixed arms 61, the movable ends of the push cylinders 73 are rotatably connected with a fourth link 74, the movable ends of the fourth link 74 are rotatably connected with an elastic telescopic rod 71, the fixed ends of the elastic telescopic rod 71 are rotatably connected with the surface of the fixed cylinder body of the support cylinder 63, and the movable ends of the elastic telescopic rod 71 are fixedly connected with a pad body 72.

The elastic telescopic rod 71 comprises a fixed cylinder 712, the fixed cylinder 712 is rotationally connected with the support cylinder 63 and the fourth connecting rod 74, a movable plate 711 is rotationally connected in the fixed cylinder 712, a square rod 714 is fixedly connected to one side of the outer surface of the movable plate 711, the square rod 714 penetrates through the fixed cylinder 712 and is in sliding connection with the fixed cylinder 712, the square rod 714 is fixedly connected with the base plate body 72, and a spring 713 fixedly connected with the movable plate 711 is sleeved on the outer surface of the square rod 714.

The backing plate mechanism 7 is matched with the double-extension supporting mechanism, the pushing oil cylinder 73 pushes the fourth connecting rod 74 to move, so that the elastic telescopic rod 71 rotates by taking the rotation joint of the elastic telescopic rod 71 and the supporting oil cylinder 63 as the center until the backing plate body 72 is positioned right below the supporting seat 64, then the supporting oil cylinder 63 drives the supporting seat 64 to descend, the supporting seat 64 drives the backing plate body 72 to descend until the backing plate body 72 is contacted with the ground and then integrally props up the lorry crane, and the backing plate body 72 drives the square rod 714 to descend while descending, so that the spring 713 is extruded through the movable plate 711.

When the pad body 72 loses the downward pushing force of the supporting seat 64, the spring 713 can push the movable plate 711 to reset, then drive the pad body 72 to rise through the square rod 714, and then push the oil cylinder 73 to drive the elastic telescopic rod 71 and the pad body 72 to reset through the fourth connecting rod 74.

As shown in fig. 8, the gravity center offset detection mechanism 8 includes a housing 83, and the housing 83 is fixedly connected with the base 51, pressure sensors 84 are symmetrically and fixedly mounted on inner walls of two sides of the housing 83, the detection ends of the two pressure sensors 84 are fixedly connected with cross plates 81, and a balancing weight 82 is abutted between the two cross plates 81.

The balancing weight 82 can deviate along with the deviation of the center of the lorry-mounted crane, so that the pressure sensor 84 at one end of the downward inclination of the balancing weight 82 detects the increase of the pressure value, when the pressure value increases to the set value, the pressure sensor 84 sends a signal to the controller, and the controller controls the second alarm 46 to sound, so that the timely response of operators is improved, and the rollover risk is reduced.

Wherein the pressure sensor 84 is of the type PST, brand Ke Li.

As shown in fig. 5, the top of the column body 32 is fixedly connected with an oil pipe bracket 31.

The tubing mount 31 facilitates installation of the first cylinder 14 using tubing.

As shown in fig. 6 and 10, a ladder 42 is fixedly connected to one side of the outer surface of the arm body 43, a cockpit 41 is fixedly connected to one side of the outer surface of the arm body 43, and a first alarm 45 and a second alarm 46 are fixedly installed in the cockpit 41.

The cockpit 41 is beneficial for the operator to operate the whole, and the ladder 42 is beneficial for the operator to climb up the cockpit 41.

The first alarm 45 and the second alarm 46 have the function of warning and reminding, and are favorable for reminding operators of timely coping.

As shown in fig. 7 and 13, two U-shaped screws 52 are symmetrically and fixedly connected to the bottom of the base 51, locking seats 53 are sleeved on the outer surfaces of the two U-shaped screws 52, and locking nuts are sleeved on the outer surfaces of the two U-shaped screws 52.

The U-shaped screw 52 is aligned with the mounting seat of the car body, the locking seat 53 is sleeved, and finally the locking seat 53 is abutted with the mounting seat of the car body through the locking nut and the U-shaped screw 52, so that the base 5 is fixed on the car body.

The vehicle-mounted crane stretching system comprises a controller, a pump station and any one of the vehicle-mounted cranes, wherein the controller and the pump station are respectively connected with the vehicle-mounted cranes.

The controller consists of an image processor, a program counter, an instruction register, an instruction decoder, a time sequence generator and an operation controller, and is a decision mechanism of the whole lorry-mounted crane.

The pump station is composed of a hydraulic pump, a driving motor, an oil tank, a directional valve, a throttle valve, an overflow valve and the like. The oil is supplied according to the flow direction, pressure and flow rate required by the driving of the lorry-mounted crane, so that the first oil cylinder 14, the second oil cylinder 34, the third oil cylinder 44, the fourth oil cylinder, the supporting oil cylinder 63, the pushing oil cylinder 73 and the hydraulic rotary speed reducer 411 can operate, and various specified action extension of the lorry-mounted crane can be realized.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a reference structure" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a lorry-mounted crane, includes multisection telescopic boom (1), its characterized in that: the device is characterized in that a middle column (3) is assembled at the mounting end of the multi-section telescopic arm (1), a steel wire rope detection mechanism (2) is fixedly installed at the bottom of the multi-section telescopic arm (1), a rotating arm (4) is assembled at the bottom of the middle column (3), a base (5) is rotatably assembled at the bottom of the rotating arm (4), two double-extension supporting mechanisms (6) are fixedly installed at the two ends of the base (5), a backing plate mechanism (7) is installed at the two double-extension supporting mechanisms (6), and a gravity center deviation detection mechanism (8) is fixedly installed at the bottom of the base (5);

the multi-section telescopic boom (1) comprises a plurality of telescopic boom bodies (11), two adjacent telescopic boom bodies (11) are in limit sliding connection, a first fixed block (15) is fixedly connected to the top of each telescopic boom body (11), a second fixed block (12) is fixedly connected to the top of each telescopic boom body (11), a plurality of middle telescopic boom bodies (11) are fixedly connected with a supporting frame (13), a first oil cylinder (14) is fixedly installed between two adjacent supporting frames (13), between each second fixed block (12) and each adjacent supporting frame (13) and between each first fixed block (15) and each adjacent supporting frame (13), a connecting seat (16) is fixedly connected to the outer surface of each telescopic boom body (11), and a first connecting rod (17) is rotatably connected to the outer surface of each connecting seat (16);

the middle column (3) comprises a column body (32), the column body (32) is rotationally connected with the connecting seat (16), a second connecting rod (33) is rotationally connected between one side of the outer surface of the column body (32) and the first connecting rod (17), a second oil cylinder (34) is rotationally connected in the column body (32), a movable end of the second oil cylinder (34) is rotationally connected with the connecting seat (16), a first connecting part (36) is arranged at the bottom of the column body (32), and a third connecting rod (35) is rotationally connected to two sides of the outer surface of the column body (32);

the rotary arm (4) comprises an arm body (43), a connecting frame (48) is connected to two sides of the outer surface of the arm body (43) in a rotating mode, the connecting frame (48) is connected with a third connecting rod (35) in a rotating mode, a third oil cylinder (44) is connected to the inside of the arm body (43) in a rotating mode, a movable end of the third oil cylinder (44) is connected with the connecting frame (48) in a rotating mode, a second connecting portion (49) is arranged at the top of the arm body (43), the second connecting portion (49) is connected with a first connecting portion (36) in a rotating mode, a connecting plate (410) is fixedly connected to the bottom of the arm body (43), two hydraulic rotary speed reducers (411) are symmetrically and fixedly connected to the bottom of the connecting plate (410), and gears (47) are fixedly connected to the output ends of the two hydraulic rotary speed reducers (411);

the base (5) comprises a base (51), an annular plate (54) is fixedly connected to the top of the base (51), annular teeth (55) meshed with the gear (47) are fixedly connected to the top of the annular plate (54), and the annular teeth (55) are rotatably connected with the connecting plate (410).

2. A lorry-mounted crane according to claim 1, characterised in that: the wire rope detection mechanism (2) comprises a shell (21), the shell (21) is fixedly connected with the adjacent telescopic boom body (11), the CCD visual detection cameras (23) are fixedly installed at the inner top and the inner bottom of the shell (21), and two wire rope guide wheels (22) are rotatably connected in the shell (21).

3. A lorry-mounted crane according to claim 1, characterised in that: the two support mechanisms (6) extend in two, each support mechanism comprises a fixed arm (61), the fixed arms (61) are fixedly connected with the base (51), one ends of the fixed arms (61) are inserted into the movable arms (62) in a sliding mode, fourth oil cylinders are fixedly installed in the fixed arms (61), movable ends of the fourth oil cylinders are fixedly connected with the movable arms (62), support oil cylinders (63) are fixedly connected to the bottoms of the movable arms (62), and supporting seats (64) are fixedly installed at the movable ends of the support oil cylinders (63).

4. A lorry-mounted crane according to claim 3, characterised in that: the two backing plate mechanisms (7) comprise pushing oil cylinders (73), the pushing oil cylinders (73) are fixedly arranged at the bottoms of the fixed arms (61), movable ends of the pushing oil cylinders (73) are rotationally connected with fourth connecting rods (74), movable ends of the fourth connecting rods (74) are rotationally connected with elastic telescopic rods (71), fixed ends of the elastic telescopic rods (71) are rotationally connected with the surfaces of fixed cylinder bodies of the supporting oil cylinders (63), and movable ends of the elastic telescopic rods (71) are fixedly connected with backing plate bodies (72).

5. A lorry-mounted crane according to claim 4, characterised in that: the elastic telescopic rod (71) comprises a fixed cylinder (712), the fixed cylinder (712) is rotationally connected with a supporting oil cylinder (63) and a fourth connecting rod (74), a movable plate (711) is rotationally connected inside the fixed cylinder (712), a square rod (714) is fixedly connected to one side of the outer surface of the movable plate (711), the square rod (714) penetrates through the fixed cylinder (712) and is in sliding connection with the fixed cylinder, the square rod (714) is fixedly connected with a base plate body (72), and a spring (713) fixedly connected with the movable plate (711) is sleeved on the outer surface of the square rod (714).

6. A lorry-mounted crane according to claim 1, characterised in that: the gravity center offset detection mechanism (8) comprises a shell (83), the shell (83) is fixedly connected with the base (51), pressure sensors (84) are symmetrically and fixedly installed on inner walls of two sides of the shell (83), transverse plates (81) are fixedly connected to detection ends of the pressure sensors (84), and balancing weights (82) are abutted between the transverse plates (81).

7. A lorry-mounted crane according to claim 1, characterised in that: the top of the column body (32) is fixedly connected with an oil pipe bracket (31).

8. A lorry-mounted crane according to claim 1, characterised in that: the novel intelligent control device is characterized in that a ladder (42) is fixedly connected to one side of the outer surface of the arm body (43), a cockpit (41) is fixedly connected to one side of the outer surface of the arm body (43), and a first alarm (45) and a second alarm (46) are fixedly installed in the cockpit (41).

9. A lorry-mounted crane according to claim 1, characterised in that: two U-shaped screws (52) are symmetrically and fixedly connected to the bottom of the base (51), locking seats (53) are sleeved on the outer surfaces of the two U-shaped screws (52), and locking nuts are sleeved on the outer surfaces of the two U-shaped screws (52).

10. A lorry-mounted crane extension system, characterized in that: comprising a controller, a pump station and a lorry-mounted crane according to any one of claims 1 to 9, wherein the controller and the pump station are connected to the lorry-mounted crane, respectively.