CN106995199B - Overhead truck comprising telescopic boom - Google Patents

Abstract

The invention relates to the field of mechanical equipment, in particular to a high-altitude vehicle comprising a telescopic boom. The invention is realized by the following technical scheme: a high-altitude vehicle comprising a telescopic boom frame comprises a lower vehicle assembly, a vehicle arm, a working platform and a slewing gear, wherein the slewing gear is rotatably connected with the lower vehicle assembly and drives the vehicle arm to rotate relative to the ground; the invention aims to provide a high-altitude vehicle comprising a telescopic arm support, the steering control of a driving wheel is accurate, the steering function can be completed in a smaller space, and a working platform is stable and convenient to adjust.

Description

Overhead truck comprising telescopic boom

Technical Field

The invention relates to the field of mechanical equipment, in particular to a high-altitude vehicle comprising a telescopic boom.

Background

The straight-arm high-altitude vehicle can be used during high-altitude operation, the high-altitude vehicle can remotely control the vehicle to walk, lift, rotate and the like, people, tools and the like can be quickly and safely lifted to a certain height, and high-altitude operation, maintenance and other work can be conveniently carried out. The high-altitude vehicle is widely applied to the fields of electric power, road administration, communication, airports, shipbuilding factories and the like, and the high-altitude vehicle can be automatically moved to ensure the high-efficiency and safety of construction operation such as high-altitude maintenance and the like.

In the structure of high altitude car, need the automobile body part to possess walking structure, be responsible for the walking of vehicle, the braking, also need the automobile arm part, automobile arm part is connected with walking structure, possesses certain terrain clearance when the liftoff, still needs work platform, and work platform is as staff's platform carrier, and the staff accomplishes high altitude construction on work platform.

In the design of the existing high-altitude vehicle, the existing high-altitude vehicle has the defects of inconvenient steering, insufficient opening length of a vehicle arm, inconvenient maintenance of a telescopic device and unstable position of a working platform, and has an improvement space.

Disclosure of Invention

The invention aims to provide a high-altitude vehicle comprising a telescopic arm support, the steering control of a driving wheel is accurate, the steering function can be completed in a smaller space, and a working platform is stable and convenient to adjust.

The technical purpose of the invention is realized by the following technical scheme: a high-altitude vehicle comprising a telescopic arm support comprises a lower vehicle assembly, a vehicle arm and a working platform, and further comprises a rotating device which is rotatably connected with the lower vehicle assembly and drives the vehicle arm to rotate relative to the ground, wherein a flying arm is hinged between the vehicle arm and the working platform, the tail end of the vehicle arm is connected with a leveling device which ensures that the working platform keeps horizontal when the vehicle arm is telescopic, the leveling device comprises a leveling oil cylinder, and the leveling oil cylinder is connected with the vehicle arm and the flying arm; get off the assembly and contain frame and drive wheel, the drive wheel contains preceding wheelset and rear wheel group, preceding wheelset with two of rear wheel group all rely on between the drive wheel to turn to the device and connect, turn to the device contain steering cylinder, steering linkage and two respectively both ends with steering cylinder and steering linkage articulated piece, articulated piece with the part that steering cylinder connects with the drive wheel is connected, steering cylinder steering linkage and two articulated piece has formed a slice trapezoidal space jointly, and works as when the drive wheel is in returning positive position, the length of steering linkage is less than steering cylinder's length.

The working personnel stand on the working platform to finish the aloft work. The get-off assembly walks, brakes and steers on the ground. The rotating device rotates to drive the upper part to rotate circularly by three hundred and sixty degrees. The rotation mode of the rotating device can be realized by conventional prior art such as flanges, bearings, driving motors, racks and the like, and the rotation mode is not particularly limited in this document. The leveling device can realize that the flying arm and the working platform are always kept horizontal to the ground in the amplitude variation process of the vehicle arm through two leveling oil cylinders.

The flying arm can be composed of a parallelogram mechanism, and can realize amplitude variation action of the working platform, and the amplitude variation range is about plus or minus sixty degrees; the working platform is connected with the fly arm through a hydraulic rotating motor, and can realize the rotary motion in a positive and negative ninety-degree horizontal plane. The working platform can carry people or objects with rated load, and can be provided with a weighing sensor, and when the load is overweight, the system alarms; and ultrasonic sensors are arranged around the working platform to detect whether obstacles exist on the periphery and prevent the working platform from colliding in the operation process of the slewing device.

The steering oil cylinder extends outwards to drive the hinged sheets to drive the driving wheels to push out, the angles of the driving wheels are cheap, meanwhile, the two driving wheels are connected with the steering pull rod through the hinged sheets, the length of the steering pull rod is unchanged, when the angle of one driving wheel is changed, the other driving wheel is pulled by the steering pull rod, and the angle is also changed.

In the technical scheme, the steering oil cylinder, the steering pull rod and the two hinged sheets do not form a parallelogram, but form a trapezoidal space together, and when the driving wheel is in the return position, the length of the steering pull rod is smaller than the total length of the steering oil cylinder. In actual production, the number of the steering cylinders is often two, and the steering cylinders respectively push the left wheel and the right wheel. The steering pull rod is a short side of a trapezoid, the total length of the two steering cylinders is the right side of the trapezoid, the arrangement mode is that when one of the steering cylinders is pushed out, the steering angles of the left wheel and the right wheel are actually deviated, but the steering angles of the two driving wheels are not parallel, and the angle difference can be more suitable for steering in a smaller space and a smaller radius. Moreover, the steering scheme does not need a traditional steering angle sensor and a control component matched with the traditional steering angle sensor, and the design and manufacturing cost is reduced.

Preferably, the steering device further comprises a bogie, the bogie is connected with a swing device, the swing device comprises a swing axle and swing oil cylinders, the swing axle is connected with the bogie, one end of each swing oil cylinder is connected to the frame, the other end of each swing oil cylinder abuts against the upper surface of the swing axle, the swing oil cylinders extend in the vertical direction, the swing axles are located below the frame, and at least two swing oil cylinders are provided.

When the vehicle runs into a depression to generate bump, the driving wheel and the steering device connected with the driving wheel can ascend and leave the ground due to bump, and the swing device is used for adapting to bump and applying downward force to the driving wheel to fix the driving wheel on the ground.

When the steering device rises, the steering device can be abutted against the lower surface of the swing oil cylinder, the swing oil cylinder avoids the swing bridge from continuing to rise on the one hand, and buffers and absorbs impact force brought by the swing bridge on the other hand, so that energy absorption and buffering are realized.

Preferably, the lower end of the swing oil cylinder comprises a movable ball head, a plurality of contact blocks which surround the lower surface of the movable ball head and can rotate circumferentially, and a plurality of buffer floating blocks which are made of elastic materials and comprise deformation holes are arranged at the lower end of the contact blocks, the buffer floating blocks are arranged in a rectangular array, through holes are formed in the side faces of the buffer floating blocks, the position where the swing bridge is connected with the driving wheel is located at the wheel center of the driving wheel, and an eccentric distance exists between the position where the hinge plate is connected with the driving wheel and the wheel center of the driving wheel.

The flexible buffer force effect of the technical scheme is better, and the rigid collision of each part is protected.

Preferably, the middle of the swing axle is connected with a middle connecting piece, the number of the steering cylinders is two, one end of each steering cylinder is connected with the middle connecting piece, the other end of each steering cylinder extends towards the driving wheels at the two sides, the frame is provided with a balance weight, the frame is further provided with a flange, the driving wheels are connected with a driving device, and the driving device comprises a hydraulic motor and a brake.

The weighing device is characterized by further comprising a weighing structure, wherein the weighing structure comprises the working platform, two connecting seats and two connecting rods, the two connecting rods are located at different height positions, two ends of each connecting rod are hinged to the connecting seats and the working platform respectively, the weighing device further comprises a supporting plate fixedly connected to the connecting seats, a weighing inductor installed on the supporting plate, and a pressing plate fixedly connected to the working platform and pressed on the weighing inductor.

The working platform has a certain dead weight and bears goods. And two the connecting rod respectively with the connecting seat with work platform both ends are articulated, and this region has formed a parallelogram that can deform, works as when work platform bears the goods, because the influence of gravity, pressure pushes down, and the deformation takes place in the parallelogram region, and meanwhile, the clamp plate with the layer board is close to each other, the inductor of weighing receives the extrusion on vertical direction to sensing real-time pressure. By adopting the technical scheme, on one hand, the pressure value is obtained by adopting a parallelogram simulation mode, and the parallelogram can exist on the side surface of the working platform, so that the space is saved, and the operation is convenient and safe. On the other hand, data can be collected in real time, and the pressure value can be obtained at the first time.

Preferably, the connecting piece comprises a triangular plate extending in the vertical direction and a bearing edge, one end of the bearing edge is connected to the triangular plate, and the other end of the bearing edge is connected to the pressing plate.

Preferably, the bearing edge comprises a sliding guide part and a deposition part, the sliding guide part is located close to the triangular plate, the deposition part is close to the pressing plate, the sliding guide part and the deposition part are both arc-shaped, the arc center direction of the sliding guide part is downward, the arc center direction of the deposition part is upward, the pressing plate is provided with an observation groove, and the observation groove comprises a main groove part and deformation energy absorption parts, the deformation energy absorption parts are located at two ends of the main groove part and are arc-shaped.

Due to the deformation of the parallelogram and the weight of the working platform, the connecting piece needs to have a suitable structural strength. In the technical scheme, the plurality of bearing edges are distributed on two sides of the triangular plate, so that the pressure applied to the bearing sensor is not only from the center of the pressing plate, but also from a large area of the pressing plate, namely the bearing edges optimize the trend of the pressure, the edge stress of the pressing plate is increased by utilizing the structure of the bearing edges, and the reading of the bearing sensor is more accurate. On the other hand, during actual operation, the middle part is always stressed more, so that the guide sliding part is arranged at a position close to the triangular plate. The function of the slide guide part is that firstly, the slide guide part is designed into an outward convex arc shape to lead the dust in the workshop to be downward, namely the deposition part Fang Xiangdao, and secondly, as mentioned above, the stress is large near the middle part, so the size of the slide guide part is larger than that of the deposition part, and the shape is set into the arc center direction downward. The deposition part is closer to the side section which is lower in the vertical direction and is more towards the pressure plate in the horizontal direction, and dust which slides down by the guide sliding part can be accumulated at the side section, so that workers can clean and tidy the dust from the side section conveniently.

The user can check and observe the state of the weighing sensor through the observation groove on the pressing plate. When the pressure plate extrudes the weighing sensor, a part of generated pressure can be absorbed by the deformation energy absorption part, and the equipment is protected.

Preferably, the vehicle arm comprises a first section of arm, a second section of arm which can slide relative to the first section of arm, a third section of arm which slides relative to the second section of arm, a first stretching device for driving the second section of arm to slide out, and a second stretching device for driving the third section of arm to slide out, wherein the steel wire rope comprises an arm stretching rope, one stretching device comprises a telescopic oil cylinder, one end of the telescopic oil cylinder is connected with the first section of arm, the other end of the telescopic oil cylinder is connected with the second section of arm, the second stretching device comprises an arm stretching pulley connected with the telescopic oil cylinder, and the arm stretching rope is wound on the arm stretching pulley, one end of the arm stretching rope is connected with the first section of arm, and the other end of the arm stretching rope is connected with the third section of arm.

The telescopic arm can be designed in a telescopic mode, the two-section arm is arranged in the one-section arm, the three-section arm is arranged in the two-section arm, and when the telescopic arm does not need to be stretched, the three-section arm can be sleeved and contracted into the minimum length of the whole telescopic arm. When the telescopic oil cylinder needs to be unfolded, the telescopic oil cylinder extends, in the process, the first section of arm is kept in the original position, and when the telescopic oil cylinder extends, the second section of arm is driven to extend forwards.

When the telescopic oil cylinder is pushed out, the boom extending pulley connected to one end of the telescopic oil cylinder is synchronously pushed out, the total length of the boom extending rope is unchanged, one end of the boom extending rope is fixedly connected to the three-section boom, the other end of the boom extending rope bypasses the boom extending pulley and is connected with the three-section boom, and therefore after the boom extending pulley is pushed out, the end, connected with the three-section boom, of the boom extending rope is driven to move forwards, and the three-section boom extends forwards.

In addition, the forward extending process of the two-section arm and the three-section arm is uniform, the three-section arm is pushed after the two-section arm is pushed out, the two-section arm is opened synchronously and extends synchronously, and the use stability of the device is further improved.

Preferably, the second stretching device further comprises a boom retracting pulley and a boom retracting rope which are connected with the telescopic cylinder, one section of the boom retracting rope is connected with the three sections of booms, the other end of the boom retracting rope is connected with the one section of boom by bypassing the boom retracting pulley, and the boom extending pulley is arranged in front of the telescopic cylinder compared with the boom retracting pulley according to the extending direction of the telescopic cylinder.

The arm retracting rope and the arm retracting pulley are used for retracting the three-section arm when the telescopic oil cylinder retracts, and the principle is similar to the arm extending process.

Preferably, a cylinder barrel part of the telescopic oil cylinder is connected to the first-section arm through a cylinder barrel pin shaft, a cylinder rod part is connected to the second-section arm through a cylinder rod pin shaft, the telescopic oil cylinder further comprises an oil cylinder sliding block, the oil cylinder sliding block is connected with the third-section arm in a sliding mode, the oil cylinder sliding block supports the arm extending pulley, one surface, close to the arm extending pulley, of the oil cylinder sliding block is a circular arc-shaped bearing arc surface, the second-section arm is sleeved in the first-section arm, the third-section arm is sleeved in the second-section arm, the second-section arm is in contact with the first-section arm through the sliding block, and the third-section arm is in contact with the second-section arm through the sliding block.

One end of the telescopic oil cylinder is connected to the section of arm, but the other end of the telescopic oil cylinder also needs a certain support to increase the stability of the equipment. The three-section arm can be provided with a track or a sliding chute for the sliding of the oil cylinder sliding block, the oil cylinder sliding block always supports and supports the boom extending pulley in the sliding process, the boom extending pulley can be connected with the telescopic oil cylinder through fasteners such as screws, namely, the oil cylinder sliding block plays a role in supporting and stabilizing the telescopic oil cylinder. The slider can improve the smooth and easy degree of slip that removes between each festival arm, reduces frictional force.

In conclusion, the invention has the following beneficial effects:

1. the stretching device can be directly detached from the arm support of the vehicle arm and drawn out, the whole vehicle arm does not need to be detached, and the maintenance is convenient.

2. The arrangement of the swing oil cylinder and the swing bridge optimizes the jolt generated when the vehicle travels, and buffers the force unloading.

3. Through the quality of adjusting the counter weight and changing the ring flange, can change the whole car facial make-up of different series heights, reduce design and cost of manufacture.

4. The trapezoidal length edge of the steering device is designed differently, so that an electronic control component and a steering sensor are omitted, and the steering angle of a left vehicle and a right vehicle can be adjusted differently.

5. According to the deformation of the parallelogram, the pressure transmission of the working platform during loading is met.

6. And monitoring the load numerical value of the working platform in real time according to the extrusion of the supporting plate and the pressing plate symmetrical weight sensor.

7. The special design of the load-bearing edge optimizes the force.

8. The joint arm is designed in a three-section manner, so that the space is saved, and the extension range is enlarged;

9. the design of the arm extending rope and the arm extending pulley can smoothly stretch the three sections of arms;

10. the three-section arm and the two-section arm are synchronously pulled apart, and the movement is stable;

11. the travel switch can measure the tension of the arm extending rope at the first time, so that the safety is improved;

12. the oil cylinder sliding block can improve the supporting performance of the telescopic oil cylinder.

Description of the drawings:

FIG. 1 is a schematic diagram of example 1;

FIG. 2 is a schematic illustration of the mid-lower vehicle assembly of FIG. 1;

FIG. 3 is a schematic view of the vehicle arm;

FIG. 4 is a schematic view of a weighing structure;

FIG. 5 is an enlarged partial side view of FIG. 4;

fig. 6 is a schematic view of a connector.

In the figure:

2. the device comprises a first-section arm 3, a second-section arm 4, a third-section arm 5, a telescopic cylinder 6, an arm extending rope 7, an arm extending pulley 8, a cylinder slider 9, an arm retracting rope 10, a slider 17, an arm retracting pulley 18, a cylinder pin 19, a cylinder rod pin shaft 11, a swinging device 111, a swinging bridge 12, a counterweight 13, a frame 14, a steering device 141, a bogie 142, a steering pull rod 143, a steering cylinder 144, a hinge plate 145, a middle connecting plate 15, a flange plate 16, a driving wheel 21, a connecting rod 22, a connecting seat 23, a pressing plate 231, an observation groove 24, a weighing sensor 25, a supporting plate 26, a working platform 27, a connecting piece 271, a triangular plate 272, a bearing edge 2721, a guide sliding part, 2722, a deposition part 34, a vehicle arm, 35, a slewing device, 37, a lower vehicle assembly 38, a leveling device, 39 and a flying arm.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

In embodiment 1, as shown in fig. 1, fig. 2, fig. 3, and fig. 4, an overhead car including a telescopic boom frame includes a lower vehicle assembly 37, a boom 34, a working platform 26, and a swivel device 35 rotatably connected to the lower vehicle assembly 37 and driving the boom 34 to rotate relative to the ground, a flying boom 39 is hinged between the boom 34 and the working platform 26, a leveling device is connected to a tail end of the boom 34 and ensures that the working platform 26 is kept horizontal when the boom 34 is telescopic, the leveling device includes a leveling cylinder, and the leveling cylinder is connected to the boom 34 and the flying boom 39;

the worker stands on the work platform 26 to complete the aerial work. The lower vehicle assembly 37 walks, brakes and steers on the ground. The rotation of the rotating device 35 drives the upper part thereof to perform three hundred and sixty degrees of circumferential rotation. The rotation mode of the rotation device 35 can be realized by a flange, a bearing, a driving motor, a rack, etc. in the conventional prior art, and is not limited in detail herein. The leveling device 38 can realize that the flying arm 39 and the working platform 26 are always kept horizontal to the ground during the amplitude variation of the vehicle arm 34 through two leveling cylinders.

The flying arm 39 can be composed of a parallelogram mechanism, and can realize the amplitude variation action of the working platform 26, and the amplitude variation range is about plus or minus sixty degrees; the working platform 26 is connected to the fly arm 39 by a hydraulic rotary motor, and can perform a swing motion in a positive and negative ninety degree horizontal plane. The working platform 26 can carry people or objects with rated load, and can be provided with a weighing sensor, so that when the load is overweight, the system gives an alarm; the periphery of the working platform 26 is provided with ultrasonic sensors to detect the presence of obstacles around the working platform and prevent the working platform 26 from colliding with the rotating device 35 during operation.

A high-altitude vehicle comprising a telescopic arm support comprises a vehicle frame 13 and driving wheels 16, wherein the driving wheels 16 comprise a front wheel set and a rear wheel set, the front wheel set and the two driving wheels 16 of the rear wheel set are connected by virtue of a steering device 14, the steering device 14 comprises a steering oil cylinder 143, a steering pull rod 142 and two hinge plates 144, two ends of each hinge plate are respectively hinged with the steering oil cylinder 143 and the steering pull rod 142, the part of each hinge plate 144 connected with the steering oil cylinder 143 is connected with the driving wheels 16, the steering oil cylinder 143, the steering pull rod 142 and the two hinge plates 144 jointly form a trapezoidal space, and when the driving wheels 16 are in a return position, the length of the steering pull rod 142 is smaller than that of the steering oil cylinder 143.

The steering cylinder 143 extends outward to drive the hinge plates 144 and push the driving wheels 16 out, the angle of the driving wheels 16 is inexpensive, and at the same time, the two driving wheels are connected to the steering rod 142 through the two hinge plates 144, and the length of the steering rod 142 is constant, and when the angle of one of the driving wheels 16 is changed, the other driving wheel 16 is pulled by the steering rod 142, and the angle is also changed.

In this embodiment, the steering cylinder 143, the steering rod 142 and the two hinge pieces 144 do not form a parallelogram, but together form a trapezoidal space, and when the driving wheel 16 is in the return position, the length of the steering rod 142 is less than the total length of the steering cylinder 143. In actual production, the steering cylinders 143 are often two and respectively push the left wheel and the right wheel. Namely, the steering rod 142 is the short side of the trapezoid, and the total length of the two steering cylinders 143 is the right side of the trapezoid, so that when one of the steering cylinders 143 is pushed out, the steering angles of the left wheel and the right wheel are actually deviated, but the steering angles of the two driving wheels 16 are not parallel, and such an angle difference can be more suitable for steering in a smaller space and with a smaller radius. Moreover, the steering scheme does not need a traditional steering angle sensor and a control component matched with the traditional steering angle sensor, and the design and manufacturing cost is reduced.

The steering device 14 further comprises a bogie 141, which is connected to the swing device 11. The swing device 11 includes a swing axle 111 connected to the bogie 141 and at least two swing cylinders, one end of each swing cylinder is connected to the frame 13, the other end of each swing cylinder abuts against the upper surface of the swing axle 111, the swing cylinders extend in the vertical direction, the swing axle 111 is located below the frame 13, and the number of the swing cylinders is at least two.

When the vehicle bumps in a depression during forward movement, the driving wheel 16 and the steering device 14 connected with the driving wheel rise and leave the ground due to the bump, and the swing device 11 is used for adapting to the bump and applying a downward force to the driving wheel 16 to fix the driving wheel on the ground.

When the steering device 14 rises, the steering device will collide with the lower surface of the swing oil cylinder, and the swing oil cylinder prevents the swing bridge 111 from continuing to rise on the one hand, and buffers and absorbs impact force brought by the swing bridge 111 on the other hand, so as to absorb energy.

The lower end of the swing oil cylinder comprises a movable ball head, a contact block which surrounds the lower surface of the movable ball head and can rotate circumferentially, and a plurality of buffer floating blocks which are made of elastic materials and comprise deformation holes are arranged at the lower end of the contact block, the buffer floating blocks are arranged in a rectangular array, and through holes are formed in the side faces of the buffer floating blocks.

The flexible buffer force effect of the technical scheme is better, and the rigid collision of each part is protected.

The position where the swing bridge 111 is connected to the driving wheel 16 is located at the wheel center of the driving wheel 16, and the position where the hinge plate 144 is connected to the driving wheel 14 is located at an eccentric distance from the wheel center of the driving wheel 16.

The middle position of the swing axle 11 is connected with a middle connecting piece 145, the number of the steering cylinders 143 is two, one end of each steering cylinder is connected with the middle connecting piece 145, and the other end of each steering cylinder extends towards the driving wheels 16 on the two sides.

The frame 13 is provided with a balance weight 12 and a flange 15, and the driving wheel 16 is connected with a driving device which comprises a hydraulic motor and a brake.

The structure of weighing contains work platform 26, still contains connecting seat 22 and connecting rod 21, and connecting rod 21 is two, is located not co-altitude position, and every connecting rod 21 both ends are equallyd divide and are do not articulated with connecting seat 22 and work platform 26, still contain fixed connection at the layer board 25 on connecting seat 22, install weighing inductor 24 on layer board 25 and with work platform 26 fixed connection and press the clamp plate 23 on weighing inductor 24.

The work platform 26 has a certain self-weight and carries cargo. And two connecting rods 21 are articulated with connecting seat 22 and work platform 26 both ends respectively, and this region has formed a parallelogram that can deform, and when work platform 26 bore the weight of the goods, because the influence of gravity, pressure pushes down, and deformation takes place in the parallelogram region, and meanwhile, clamp plate 23 and layer board 25 are close to each other, and weighing inductor 24 receives the extrusion on vertical direction to the sensing is to real-time pressure. By adopting the technical scheme, on one hand, the pressure value is obtained by adopting a parallelogram simulation mode, and the parallelogram can exist on the side surface of the working platform 26, so that the space is saved, and the operation is convenient and safe. On the other hand, data can be collected in real time, and the pressure value can be obtained at the first time.

The connecting piece 27 is arranged on the pressing plate 23, and the connecting piece 27 comprises a triangular plate 271 extending in the vertical direction and a bearing edge 272, one end of which is connected to the triangular plate 271, and the other end of which is connected to the pressing plate 23.

The load-bearing rib 272 includes a sliding guide portion 2721 located near the triangular plate 271 and a deposition portion 2722 located near the platen 23, the sliding guide portion 2721 and the deposition portion 2722 are both arc-shaped, an arc center of the sliding guide portion 2721 is downward, and an arc center of the deposition portion 2722 is upward.

Due to the deformation of the parallelogram and the weight of the working platform 26, the connecting member 27 needs to have a suitable structural strength. In the technical scheme, the plurality of bearing ribs 272 are distributed on two sides of the triangular plate 271, so that the pressure applied to the bearing sensor 24 is not only from the center of the pressing plate 23, but also from a large area of the pressing plate 23, namely, the bearing ribs 272 optimize the pressure trend, the edge stress of the pressing plate 23 is increased by utilizing the self structure, and the reading of the bearing sensor 24 is more accurate. On the other hand, in actual operation, the force applied to the middle part tends to be larger, so that the sliding guide part is provided at a position close to the triangular plate 271. The function of the sliding guide part is that the sliding guide part is designed to be convex arc-shaped, which guides the dust in the workshop downwards, namely the direction of the deposition part 2722, and that the sliding guide part 2721 is stressed greatly near the middle part as mentioned above, so the size of the sliding guide part 2721 is larger than that of the deposition part 2722, and the shape is set to be arc center direction downwards. The deposition portions 2722 are closer to the side sections that are lower in the vertical direction and are more toward the platen 23 in the horizontal direction, and dust sliding down from the slide guide portions 2721 can be accumulated therein for workers to clean and tidy from the side sections.

The pressing plate 23 is provided with an observation groove 231, and the observation groove 231 comprises a main groove portion and deformation energy absorption portions which are positioned at two ends of the main groove portion and are arc-shaped.

The user can check the state of the load cell 24 through the observation slot 231 of the pressing plate 23. When the pressure plate 23 is extruded by the symmetrical weight sensor 24, a part of the generated pressure can be absorbed by the deformation energy absorption part, and the equipment is also protected.

The car arm contains one section arm 2 and can with two section arms 3 of 2 relative sliding of a section arm, still contain with two section arm 3 relative sliding's three section arm 4, still contain the stretching device one that is used for driving two section arms 3 roll-offs and be used for driving three section arm 4 roll-offs stretching device two, stretching device one contains one end and is connected with one section arm 2, the other end and the flexible hydro-cylinder 5 that two section arms 3 are connected, stretching device two contains the outrigger pulley 7 of being connected with flexible hydro-cylinder 5 and the outrigger rope 6 of wire-wound on outrigger pulley 7, outrigger rope 6 one end is connected with one section arm 2, the other end is connected with three section arm 3. The arm extension rope 6 and the arm retraction rope 9 belong to the steel wire rope 68.

Can adopt the socket formula design, two festival arms 3 are in one festival arm 2, and three festival arms 4 are in two festival arms 3, and when need not to extend, three festival arms can cup joint the minimum length that contracts into whole. When the telescopic oil cylinder 5 needs to be unfolded, the telescopic oil cylinder 5 extends, in the process, the first section of arm 2 keeps in the original position, and when the telescopic oil cylinder 5 extends, the second section of arm 3 is driven to extend forwards.

When the telescopic oil cylinder 5 is pushed out, the boom extension pulley 7 connected to one end of the telescopic oil cylinder 5 is also synchronously pushed out, the total length of the boom extension rope 6 is unchanged, one end of the boom extension rope is fixedly connected to one section of arm 2, the other end of the boom extension rope is unchanged, but the other end of the boom extension rope bypasses the boom extension pulley 7 and is connected with the three-section arm 4, so that after the boom extension pulley 7 is pushed out, one end of the boom extension rope 6 connected with the three-section arm 4 is driven to move forwards, and the three-section arm 4 extends forwards.

In addition, the forward extending process of the two-section arm 3 and the three-section arm 4 is uniform, the two-section arm 3 is not pushed out completely, and then the three-section arm 4 is pushed out, but the two-section arm is opened synchronously and extends synchronously, so that the use stability of the device is further improved.

The second stretching device further comprises a arm contracting pulley 17 and an arm contracting rope 9 which are connected with the telescopic oil cylinder 5, one section of the arm contracting rope 9 is connected with the three-section arm 3, and the other end of the arm contracting rope is connected with the one-section arm 2 by bypassing the arm contracting pulley 17. The arm retracting rope 9 and the arm retracting pulley 17 are used for retracting the three-section arm 4 when the telescopic oil cylinder 5 retracts, and the principle is similar to the arm extending process.

According to the extending direction of the telescopic oil cylinder 5, the arm extending pulley 7 is arranged in front of the telescopic oil cylinder 5 compared with the arm retracting pulley 17. The cylinder barrel part of the telescopic oil cylinder 5 is connected to the first-section arm 2 through a cylinder barrel pin shaft 18, and the cylinder rod part is connected to the second-section arm 3 through a cylinder rod pin shaft 19. The three-section arm mechanism further comprises an oil cylinder sliding block 8, the oil cylinder sliding block 8 is connected with the three-section arm 4 in a sliding mode, and the oil cylinder sliding block 8 supports the arm extending pulley 7. One side of the oil cylinder sliding block 8 close to the boom extension pulley 7 is a circular arc-shaped supporting arc surface.

One end of the telescopic oil cylinder 5 is connected to one section of the arm 2, but the other end of the telescopic oil cylinder also needs a certain support to increase the stability of the equipment. The three-section arm 4 can be provided with a track or a sliding chute for the oil cylinder sliding block 8 to slide, the oil cylinder sliding block 8 always supports and supports the boom extension pulley 7 in the sliding process, the boom extension pulley 7 can be connected with the telescopic oil cylinder 5 through fasteners such as screws, and the oil cylinder sliding block 8 plays a role in supporting and stabilizing the telescopic oil cylinder 5.

The two-section arm 3 is sleeved in the one-section arm 2, and the three-section arm 4 is sleeved in the two-section arm 3. The two-section arm 3 is in contact with the one-section arm 2 through a sliding block 10, and the three-section arm 4 is in contact with the two-section arm 2 through the sliding block 10. The slider 10 can improve the smoothness of the movement between the respective joint arms and reduce the friction force.

Claims (6)

1. The utility model provides a high altitude car including flexible cantilever crane, contains get off assembly (37), car arm (34) and work platform (26), still contain with get off assembly (37) rotate to be connected, drive car arm (34) ground pivoted slewer (35) relatively, its characterized in that: a fly jib (39) is hinged between the vehicle arm (34) and the working platform (26), the tail end of the vehicle arm (34) is connected with a leveling device which ensures that the working platform (26) keeps horizontal when the vehicle arm (34) stretches, the leveling device comprises a leveling oil cylinder, and the leveling oil cylinder is connected with the vehicle arm (34) and the fly jib (39); get-off assembly (37) contain frame (13) and drive wheel (16), drive wheel (16) contain front wheel group and rear wheel group, front wheel group with two of rear wheel group all rely on between drive wheel (16) to turn to device (14) and connect, turn to device (14) contain turn to hydro-cylinder (143), turn to pull rod (142) and two respectively both ends with turn to hydro-cylinder (143) and turn to articulated piece (144) of pull rod (142), articulated piece (144) with turn to the part that hydro-cylinder (143) is connected with drive wheel (16) are connected, turn to hydro-cylinder (143), turn to pull rod (142) and two articulated piece (144) have formed a slice trapezoidal space jointly, and work as when drive wheel (16) are in returning the positive position, the length of turning to pull rod (142) is less than the length of turning to hydro-cylinder (143), still contain the structure of weighing, the structure contains work platform (26), still contains connecting seat (22) and connecting rod (21), connecting rod (21) are two, are located different height position every connecting rod (21) and are connected on every the equal division of work platform (22) still with response platform (25) and still install on work platform (26) and articulated platform (22), the support plate (25) and the fixed platform (26) and still contain the work platform (25), the fixed platform (26) and the support plate (25), the work platform (26) on the work platform (26) still ) Fixed connection and pressure are in clamp plate (23) on weighing inductor (24), still contain and establish connecting piece (27) on clamp plate (23), connecting piece (27) contain set-square (271) and the one end that extends in vertical direction are connected on set-square (271), the other end is connected bearing arris (272) on clamp plate (23), bearing arris (272) contain and are located and are close to lead smooth portion (2721) of set-square (271) and be close to deposit portion (2722) of clamp plate (23), lead smooth portion (2721) with deposit portion (2722) all are the arc, the arc core direction of leading smooth portion (2721) is downward, the arc core direction of deposit portion (2722) is upwards, observation groove (231) have been seted up on clamp plate (23), observation groove (231) contain main slot portion and are located main slot portion both ends are convex deformation energy-absorbing portion, car arm (34) contain one section arm (2) and can with the relative two of a section arm (2) slide, two slide arm (3) still contain two tensile section arms (3) and be used for tensile festival arm (4) and two tensile section arm (3) and the tensile section arm (4) of drive rope and be used for the tensile section arm device of drive rope and the tensile arm (3) and the tensile one end of slide rope section arm (3) still contain one section arm (3) and be connected, the other end with flexible hydro-cylinder (5) that two sections arms (3) are connected, stretching device two contain with stretch arm pulley (7) and the wire winding that flexible hydro-cylinder (5) are connected are in stretch arm rope (6) on stretching arm pulley (7), stretch arm rope (6) one end with a section arm (2) is connected, the other end with three sections arm (3) are connected.

2. The overhead hoist containing the telescopic boom as claimed in claim 1, wherein: bogie (14) still contains bogie (141), the bogie is connected with pendulous device (11), pendulous device (11) contain with swing axle (111) and the swing hydro-cylinder that bogie (141) are connected, swing hydro-cylinder one end is connected on frame (13), the other end supports swing axle (111) upper surface, the swing hydro-cylinder extends in vertical direction, swing axle (111) are located frame (13) below, the swing hydro-cylinder is two at least.

3. The overhead hoist comprising the telescopic boom as claimed in claim 2, wherein: the lower extreme of swing hydro-cylinder contains the activity bulb, centers on activity bulb lower surface just can be circumferential motion's conflict piece and establish the conflict piece lower extreme is made by elastic material and contains the buffering kicking block in deformation hole, the buffering kicking block is a plurality of, is the rectangular array and arranges the side of buffering kicking block is equipped with the through-hole, swing bridge (111) with the position that drive wheel (16) are connected is located the wheel center of drive wheel (16), articulated piece (144) with the position that drive wheel (14) are connected with there is the eccentricity between the wheel center of drive wheel (16).

4. The overhead crane comprising the telescopic boom as claimed in claim 3, wherein: the middle part position of swing axle (11) is connected with well even piece (145), steering cylinder (143) are two, and one end is all connected in even piece (145), and the other end is respectively to both sides drive wheel (16) direction is close to the extension, install counter weight (12) on frame (13), still install ring flange (15), drive wheel (16) are connected with drive arrangement, drive arrangement includes hydraulic motor and stopper.

5. The overhead hoist containing the telescopic boom as claimed in claim 1, wherein: stretching device two still contain with arm pulley (11) and the arm rope (9) that contracts that telescopic cylinder (5) are connected, contract arm rope (9) one end with three sections arm (3) are connected, and the other end is walked around contract arm pulley (11) with a section arm (2) are connected, press telescopic cylinder's (5) direction of extension, telescopic cylinder pulley (7) are relatively contract arm pulley (11) arrange in telescopic cylinder's (5) the place ahead.

6. The aerial lift truck as claimed in claim 5, wherein: the telescopic oil cylinder is characterized in that a cylinder barrel part of the telescopic oil cylinder (5) is connected to the first section of arm (2) through a cylinder barrel pin shaft (12), a cylinder rod part is connected to the second section of arm (3) through a cylinder rod pin shaft, an oil cylinder sliding block (8) is further included, the oil cylinder sliding block (8) is in sliding connection with the third section of arm (4), the oil cylinder sliding block (8) supports the arm extending pulley (7), one side, close to the arm extending pulley (7), of the oil cylinder sliding block (8) is a circular arc-shaped supporting arc surface, the first section of arm (2) is sleeved with the second section of arm (3), the third section of arm (4) is sleeved with the second section of arm (3), the second section of arm (3) is in contact with the first section of arm (2) through a sliding block (10), and the third section of arm (4) is in contact with the second section of arm (2) through a sliding block (10).

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