CN206108837U - Telescopic connection subassembly and aerial working platform - Google Patents

Abstract

The utility model relates to an engineering machine tool field especially relates to an engineer work vehicle, specifically concretely relates to telescopic connection subassembly and aerial working platform more. The telescopic connection subassembly is used for coupling together the flexible drive assembly AND operation platform telescopically on the aerial working platform, the telescopic connection subassembly includes: outer arm, the setting of sliding are in can follow in the outer arm inner arm and setting that the one end of outer arm is stretched out are in the flexible hydro -cylinder of forearm between outer arm and the inner arm. Therefore, the utility model provides a telescopic connection subassembly not only has great level and stretches the distance, makes the operation panel can extend to farther region on the horizontal plane, and then increase aerial working platform's working range, just the telescopic connection subassembly has higher structural strength and structural stability, can greatly improve aerial working platform's safety in utilization.

Description

Expansion joint assembly and aerial work platform

【Technical field】

This utility model is related to engineering machinery field, more particularly to a kind of engineering working vehicle, is more particularly to a kind of flexible Coupling assembly and aerial work platform.

【Background technology】

Aerial work platform is a kind of advanced aerial operation machine, can greatly improve the work effect of aerial workmen Rate, safety and comfortableness, and labor intensity is reduced, early have been widely used in developed country.China aerial work platform makes With also more and more extensively, such as initial general municipal road lamp is keeped in repair, garden tree pruning, and it is fast with China's economy Speed development, engineering construction, industrial installation, overhaul of the equipments, Factory Building maintenance, shipbuilding, electric power, municipal administration, airport, communication, gardens, traffic Constantly increase Deng the demand to aerial work platform.

Connection operation platform is used with the forearm of principal arm (can be expansion joint assembly) in traditional aerial work platform Parallelogram sturcutre, concrete structure is：Two junction points on operating board respectively with small arm head (being connected on principal arm) on two Junction point is hinged by two linking arms, and the line of two junction points is parallel with the line of two junction points on small arm head on operating board , so that two linking arms constitute one with the line of two junction points on the line and small arm head of two junction points on operating board putting down Row tetragon, the parts such as amplitude oil cylinder and leveling cyclinder are then matched again makes the forearm have luffing and levelling function；Due to existing There is the forearm to use parallelogram sturcutre so as to which stretching for horizontal direction can not meet away from being limited by the length of linking arm Level is stretched away from larger job requirement；In addition, the parallelogram forearm structure causes aerial work platform in working region Interior motility is relatively poor.

Therefore, it is necessary to provide a kind of improved make for connection operation platform and the attachment structure of principal arm and corresponding high-altitude Industry platform, to overcome the shortcoming and deficiency of above-mentioned prior art.

【Utility model content】

The purpose of this utility model aims to solve the problem that the problems referred to above, there is provided a kind of expansion joint assembly and work high above the ground are flat Not only there is platform, the expansion joint assembly larger level to stretch away from the working range for making aerial work platform increases, and described Expansion joint assembly has higher structural strength and structural stability, and can greatly guarantee aerial work platform uses safety Property.

To realize the purpose, this utility model provides a kind of expansion joint assembly, and it is used for aerial work platform Flexible transmission component telescopically couple together with operating board, the expansion joint assembly includes：Outer arm, it is slidably arranged in institute State in outer arm and the inner arm that can be stretched out from one end of the outer arm and the forearm that is arranged between the outer arm and inner arm stretch Oil cylinder

Specifically, the forearm telescopic oil cylinder includes cylinder body and the piston rod being slideably positioned in the cylinder body, the cylinder Body is fixed on the outer arm, and the external part of the piston rod is fixed on the inner arm.

It is preferred that the cylinder body is fixed on the outer wall of the outer arm, the external part of the piston rod is fixed in described On the outer wall of arm.

Correspondingly, this utility model additionally provides a kind of aerial work platform, including：The car body that is flexibly connected successively, stretch Expansion joint assembly and operating board described in contracting transmission component, any of the above-described technical scheme；The car body and flexible transmission component Between and flexible transmission component and expansion joint assembly between be all provided with support member.

Alternatively, the support member between the flexible transmission component and expansion joint assembly is amplitude oil cylinder.

Alternatively, the support member between the flexible transmission component and expansion joint assembly is the first leveling cyclinder；It is described The one end being connected with the flexible transmission component on expansion joint assembly is hinged with small arm head；One end of first leveling cyclinder It is hinged with flexible transmission component, the other end is hinged with the small arm head.

Further, the expansion joint assembly also include forearm amplitude oil cylinder, one end of the forearm amplitude oil cylinder with The small arm head is hinged, and the other end is hinged with the outer wall of the outer arm so that the small arm head, outer arm and forearm amplitude oil cylinder structure Into a triangle amplitude mechanism.

Further, the 3rd leveling cyclinder, the 3rd leveling oil are provided between the expansion joint assembly and operating board One end of cylinder is hinged with the inner arm, and the other end is hinged with the oscillating cylinder being fixed on the operating board.

Alternatively, the oscillating cylinder is provided with the angular transducer coordinated with the 3rd leveling cyclinder.

Alternatively, the second leveling cyclinder, the second leveling oil are additionally provided between the small arm head and expansion joint assembly One end of cylinder is hinged with small arm head, and the other end is hinged with the outer wall of the outer arm；The cavity and the 3rd of second leveling cyclinder The cavity of leveling cyclinder is communicated by oil pipe.

Compared with prior art, this utility model possesses following advantage：

In the technical solution of the utility model, because the expansion joint assembly includes：Outer arm, be slideably positioned in it is described outer In arm and the inner arm that can stretch out from one end of the outer arm and the forearm telescopic oil cylinder between the outer arm and inner arm, because And forearm telescopic oil cylinder can drive inner arm to stretch out from outer arm and bounce back in outer arm, in this process because inner arm can be from outer arm In stretch out, it can increase the operating board being connected with inner arm extended distance in the horizontal direction, and then realize broadening the scope of work.

Secondly, it is between the flexible transmission component and expansion joint assembly and flexible in the technical solution of the utility model Corresponding levelling gear is all provided between coupling assembly and operating board, it can ensure that operating board operationally in horizontal plane all directions On more smoothly move, and then guarantee the personal safety of workman.

Furthermore, the expansion joint assembly is slideably positioned in the outer arm using inner arm, the flexible transmission component with The frame modes such as relative supports, those structure sides are set between expansion joint assembly and between expansion joint assembly and operating board Formula can make aerial work platform have higher structural strength and structural stability, and then using for raising aerial work platform is pacified Quan Xing.

Therefore, not only there is the expansion joint assembly in this utility model larger level to stretch away from making operating board in level Farther region, and then the working range of increase aerial work platform are can extend on face, and the expansion joint assembly has There is higher structural strength and structural stability, the safety in utilization of aerial work platform can be greatly enhanced.

【Description of the drawings】

Fig. 1 is a kind of structural representation of an exemplary embodiments of aerial work platform in this utility model；

Fig. 2 is the partial enlarged drawing at M positions in Fig. 1；

Fig. 3 be Fig. 1 shown in high-altitude operation vehicle front end component another status architecture schematic diagram, the front end component bag Include expansion joint assembly, operating board and its associated connecting member etc.；

Fig. 4 is the structural representation of the flexible transmission component of the aerial work platform shown in Fig. 1；

Fig. 5 is the partial enlarged drawing of aminoacyl site in Fig. 4；

Fig. 6 is the partial enlarged drawing at B positions in Fig. 4；

Fig. 7 stretches out status architecture schematic diagram for the flexible transmission component shown in Fig. 4；

Fig. 8 is the structural representation of the inside key transmission component of the flexible transmission component shown in Fig. 4, wherein, key is passed Dynamic component includes the first sprocket wheel, the second sprocket wheel, stretches rope chain bar, returns rope chain bar and telescopic oil cylinder etc.；

Fig. 9 is another status architecture schematic diagram of the inside key transmission component of the flexible transmission component shown in Fig. 4；

Figure 10 is another status architecture schematic diagram of the inside key transmission component of the flexible transmission component shown in Fig. 4；

Figure 11 is the structural representation of the telescopic oil cylinder of the flexible transmission component shown in Fig. 4；

Figure 12 is the partial enlarged drawing at C positions in Figure 11；

Figure 13 is a kind of structural representation of the front end component of another embodiment of aerial work platform in this utility model.

【Specific embodiment】

Below in conjunction with the accompanying drawings this utility model is further described with exemplary embodiment, wherein identical in accompanying drawing Label all refers to identical part.Additionally, if it is known that the detailed description of technology is for illustrating feature of the present utility model It is unnecessary, then is omitted.

A kind of structural representation such as Fig. 1～12 of one exemplary embodiments of aerial work platform that this utility model is provided Shown, the aerial work platform includes car body 1, the flexible transmission component 2 being articulated on the car body 1 and by flexible connection The operating board 3 that component 5 is connected with the end of flexible transmission component 2.

It should be noted that the car body 1 include vehicle frame, the drive system on the vehicle frame and with the drivetrain The control chamber that system is electrically connected with, the control chamber is turnablely located at the side of the vehicle frame；The drive system includes driving Mechanism, drive mechanism, wheel set and control system etc., the control chamber with control system while be also electrically connected with；The behaviour Make to may also set up the relative control apparatus being electrically connected with the control system on platform.

The expansion joint assembly 5 includes outer arm 51, is slideably positioned in the outer arm 51 and can be from the outer arm 51 The inner arm 52 that stretches out of one end and the forearm telescopic oil cylinder 53 between the outer arm 51 and inner arm 52.

It should be noted that the forearm telescopic oil cylinder 53 includes cylinder body (not shown) and is slideably positioned in the cylinder body Piston rod (not shown)；Preferably, the cylinder body is fixed on the outer wall of the outer arm 51, and the external part of the piston rod is consolidated It is connected on the outer wall of the inner arm 52.

The first leveling cyclinder 55, the flexible connection group are provided between the flexible transmission component 2 and expansion joint assembly 5 The one end being connected with the flexible transmission component 2 on part 5 is hinged with small arm head 54；One end of first leveling cyclinder 55 with stretch Contracting transmission component 2 is hinged, and the other end is hinged with the small arm head 54；The expansion joint assembly 5 also includes forearm amplitude oil cylinder 57, one end and the small arm head 54 of the forearm amplitude oil cylinder 57 are hinged, and the other end is hinged with the outer wall of the outer arm 51, makes Obtain the small arm head 54, outer arm 51 and forearm amplitude oil cylinder 57 and constitute a triangle jib lubbing mechanism.

It should be noted that small arm head 54, outer arm 51 and flexible transmission component 2 are hinged by same bearing pin 512；It is described First leveling cyclinder 55, small arm head 54, forearm amplitude oil cylinder 57 and outer arm 51 constitute a quadric chain.In addition, first adjusts Flat oil cylinder 55 can be using electric leveling mode, it would however also be possible to employ hydraulic leveling mode；When using electric leveling mode, the forearm is made 54, outer arm 51 and flexible transmission component 2 are realized that the bearing pin 512 being hinged is provided with and are easy to and the phase of the first leveling cyclinder 55 The angular transducer (not shown) matched somebody with somebody；When using hydraulic leveling mode, the flexible transmission component 2 is provided with and described first The hydro -leveling device that leveling cyclinder 55 is mutually matched；Preferably, first leveling cyclinder 55 is using electric leveling mode.

Wherein, leveling of first leveling cyclinder 55 to the push pull maneuver realization of small arm head 54 to small arm head 54 can be passed through；Tool Body, a certain angle preset of small arm head 54 is zero-bit by the angular transducer on small arm head 54, in flexible transmission group In the amplitude changing process of part 2, small arm head 54 can accordingly be inclined, now angular transducer meeting with the luffing of flexible transmission component 2 The angle signal of small arm head 54 is delivered to into corresponding controller, controller is received and can send after signal corresponding control instruction, with Control the first leveling cyclinder and stretch the 55 flexible leveling so as to realize small arm head 54, that is, control small arm head 54 and be in default zero all the time Position.In addition, can be by the flexible luffing up and down to realize expansion joint assembly 5 of control forearm amplitude oil cylinder 57.

Further, the 3rd leveling cyclinder 58 is provided between the expansion joint assembly 5 and operating board 3, the described 3rd adjusts One end of flat oil cylinder 58 is hinged with the inner arm 52, and the other end is hinged with the oscillating cylinder 33 being fixed on the operating board 3.

Preferably, the second leveling cyclinder 56 is additionally provided between the small arm head 54 and expansion joint assembly 5, described second adjusts One end of flat oil cylinder 56 is hinged with small arm head 54, and the other end is hinged with the outer wall of the outer arm 51；Second leveling cyclinder 56 Cavity communicated by oil pipe with the cavity of the 3rd leveling cyclinder 58.

It should be noted that second leveling cyclinder 56 can avoid stretching with the setting of the 3rd leveling cyclinder 58 is connected group The run-off the straight of operating board 3 in amplitude changing process of part 5, both may insure in the amplitude changing process of expansion joint assembly 5, the operation Platform 3 remains horizontal attitude, therefore the second leveling cyclinder 56 and the 3rd leveling cyclinder 58 have two grades of levelling functions (described the One leveling cyclinder 55 and its relevant apparatus realize one-level leveling).Cavity and the 3rd leveling due to second leveling cyclinder 56 The cavity of oil cylinder 58 is communicated by oil pipe, thus can be reached with flexible matching of the second leveling cyclinder 56 by the 3rd leveling cyclinder 58 To the purpose of leveling, its detailed process is：When 5 luffing upwards of expansion joint assembly, the expansion link in forearm amplitude oil cylinder 57 Stretch out, while the expansion link in the second leveling cyclinder 56 also stretches out, now in the second leveling cyclinder 56 rod chamber hydraulic medium During the rod chamber of the 3rd leveling cyclinder 58 is flow to because of pressure, then the expansion link of the 3rd leveling cyclinder 58 bounces back, the 3rd leveling Hydraulic medium in the rodless cavity of oil cylinder 58 enters the rodless cavity of the second leveling cyclinder 56 by oil pipe, with by the 3rd leveling oil Cylinder 58 realizes leveling purpose to the pressure balance in the related chamber of the second leveling cyclinder 56；When the downward luffing of expansion joint assembly 5 When, it is also the same principle, simply the flow direction of hydraulic medium and the kinestate of associated components are contrary；Wherein, described second adjust The stroke of the cylinder barrel sectional area of the leveling cyclinder 58 of flat oil cylinder 56 and the 3rd, flexible rod area and expansion link be all it is default and Prepare.

Accompanying drawing 1～12 is referred to, it discloses the flexible transmission component of aerial work platform of the present utility model jointly One exemplary embodiments.The flexible transmission component 2 includes basic arm 21, two joint arms 22, three joint arms 23, telescopic oil cylinder 24, stretches Rope chain bar 27 and time rope chain bar 28.

Two joint arm 22 is socketed in the basic arm 21 and can stretch from the basic arm 21 (upside shown in Fig. 7) Go out, the three joint arms 23 are socketed in two joint arm 22 and can be from the external part (upside shown in Fig. 7) of two joint arm 22 Stretch out.

The telescopic oil cylinder 24 includes the cylinder barrel 241 being fixed in two joint arm 22 and is socketed in the cylinder barrel 241 Expansion link 242, the expansion link 242 have hollow structure 247, the hollow structure 247 and cylinder barrel in the expansion link 242 241 internal cavities are communicated, and oil guide pipe 245, the expansion link 242 are provided with the hollow structure 247 on the expansion link 242 External part (Fig. 9 shown in downside) be fixed on the basic arm 21.Preferably, the external part end face of the expansion link 242 leads to Cross clamp 8 to be fixed on basic arm 21, be provided with the external part of the close expansion link 242 on the cylinder barrel 241 described in being easy to The connecting portion that cylinder barrel 241 is fixed in two joint arm 22, the connecting portion may include pin shaft hole, i.e., insert bearing pin by bearing pin Kong Zhong, realizes that cylinder barrel 241 is fixed in two joint arms 22 with this；Certainly, the connecting portion on cylinder barrel 241 can also be located at cylinder barrel 241 other positions, such as middle part of cylinder barrel 241 etc..

Additionally, being installed with the first sprocket wheel 25 on the telescopic oil cylinder 24, the second sprocket wheel 26 is installed with two joint arm 22, Second sprocket wheel 26 is closer to the external part of the cylinder barrel 241 relative to the first sprocket wheel 25；The one of the stretching chain 27 End is fixed on the basic arm 21, and the other end bypasses first sprocket wheel 25 and is fixed in the three joint arms 23, that is, stretch chain The two ends of bar 27 are all in the downside (on the basis of the direction that relevant drawings in Figure of description are put) of the first sprocket wheel 25；It is described The one end for returning rope chain bar 28 is fixed in the three joint arms 23, and the other end bypasses second sprocket wheel 26 and is fixed in the basic arm On 21, that is, upside of the two ends of rope chain bar 28 all in the second sprocket wheel 26 is gone back to (with the side that relevant drawings in Figure of description are put To on the basis of).Preferably, first sprocket wheel 25 on the telescopic oil cylinder 24 in external part its described away from At the oil cylinder head of one end, second sprocket wheel 26 is in two joint arm 22 at the external part of the expansion link 242；It is logical The frame mode is crossed, the first sprocket wheel 25 and the second sprocket wheel 26 the upper and lower (with phase in Figure of description of cylinder barrel 241 can be divided into On the basis of the direction that Radix Aconiti Coreani figure is put) at the position at two ends, it can be ensured that cylinder barrel 241 is more smoothly moved, and then drives dependent part The steady transmission of part and stretching motion；Certainly, the sprocket wheel 26 of first sprocket wheel 25 and second also can arrange other correct positions, For example the first sprocket wheel 25 is located at the position on cylinder barrel 241 in the middle part of cylinder barrel, or the second sprocket wheel 26 is leaned in two joint arms 22 At the position at the nearly middle part of cylinder barrel 241 etc..

Wherein, as shown in Figure 11～12, the inner chamber of the cylinder barrel 241 of the telescopic oil cylinder 24 is by 242 points of expansion link to have Rod cavity 244 and rodless cavity 243, i.e., the cavity that the inner chamber of cylinder barrel 241 position Chong Die with expansion link 242 is formed is rod chamber 244, the inner chamber of cylinder barrel 241 it is not overlap with expansion link 242 and in the end upper right side of expansion link 242 (with Figure of description On the basis of the direction that Figure 12 puts) position be rodless cavity 243；The hollow structure 247 of the expansion link 242 passes through interface channel 246 connect with rod chamber 244；Oil guide pipe 245 in the hollow structure 247 of the expansion link 242 and the hollow structure 247 all has External oil pipe is communicated.

Further, described time rope chain bar 28 with stretch 27 respective terminations of rope chain bar by chain connector 29 it is affixed In the three joint arms 23, and each termination is respectively and fixedly connected with the both sides of the chain connector 29；By the frame mode, Have and be easy to stretch rope chain bar 27, return and preferably realize that linkage is acted between rope chain bar 28 and three joint arms 23.Certainly, stretch rope chain bar 27 with Returning rope chain bar 28 also being fixedly connected by different connection member realizations and three joint arms 23 respectively.

Further, the rope chain bar 27 of stretching is provided with chain detection apparatus；The chain detection apparatus can real-time detection phase The state of chain is closed, when related chain occurs fracture or during beyond default loosening value, it can send alarm signal, come true with this The safety in utilization of the flexible transmission component 2 is protected, and then guarantees operator and the personal safety of other related personnel.Specifically , chain detection apparatus can be located at and stretch one end that rope chain bar 27 is connected with basic arm 21.

Preferably, the basic arm 21, two joint arms 22 and three joint arms 23 are all preferably hollow structure, certainly, described basic Arm 21, two joint arms 22 and three joint arms 23 are not limited to internal for hollow structure, and it is alternatively its that can realize meeting aforementioned condition His structure.

Further, the hollow structure inside of the basic arm 21, two joint arms 22 and three joint arms 23 constitutes telescopic cavity, described Telescopic oil cylinder 24, the first sprocket wheel 25, the second sprocket wheel 26, stretch rope chain bar 27 and return rope chain bar 28 all in the telescopic cavity；Its Can make the more compact structure of this flexible transmission component 2, and then reduce the abrasion of associated components and slow down that its is aging, extend it and use Life-span, and also maintenance and frequency of maintenance can be reduced, while keeping in repair, safeguarding more convenient, maintenance and maintenance cost are relatively low, separately Outward, also can reduce to a certain extent because the exposure of above-mentioned associated components makes outside the probability for touching injury by mistake of related personnel.When So, by telescopic oil cylinder 24, the first sprocket wheel 25, the second sprocket wheel 26, stretch rope chain bar 27 and return the part such as rope chain bar 28 and be located at telescopic cavity It is also outward feasible (i.e. on the outer wall of basic arm 21, two joint arms 22 and three joint arms 23).

To sum up, because expansion link 242 is affixed on basic arm 21, therefore when by appropriate liquid media drive cylinder barrel When 241, cylinder barrel 241 can drive two joint arms 22 to move (on the basis of the direction that relevant drawings in Figure of description are put) in the lump upwards It is dynamic, so that two joint arms 22 are stretched out from the upper end of basic arm 21, and then by stretching the gearing of the sprocket wheel 25 of rope chain bar 27 and first Three joint arms 23 are pulled to stretch out from the upper end of two joint arms 22, with infusion fluid medium is continued in cylinder barrel 241, two joint arms 22 and three are saved Arm 23 can continue upward end and extend, until it reaches required shift motion or maximum preset stroke；Wherein, in this process, One sprocket wheel 25 is equivalent to a movable pulley so that three joint arms 23 are equal to the shift motion of cylinder barrel 241 relative to the displacement of basic arm 21 2 times of (i.e. displacement of two joint arms 22 relative to basic arm 21), so have and are easy to a certain degree improving flexible stroke.

When the hollow structure 247 in by expansion link 242 makes 244 oil-feed of rod chamber in cylinder barrel 241, the meeting of cylinder barrel 241 Two joint arms 22 are driven to move down in the lump, so that two joint arms 22 are retracted from the upper end of basic arm 21, and then by returning rope chain bar 28 And second the gearing of sprocket wheel 26 three joint arms 23 can be pulled to bounce back in two joint arms 22, enter with lasting in expansion link 242 Oil, two joint arms 22 can continue to be bounced back to lower end with three joint arms 23, until it reaches required retraction degree is fully retracted in place；Its In, in this process, the second sprocket wheel 26 is equivalent to a movable pulley so that three joint arms 23 are equal to relative to the displacement of basic arm 21 2 times of the shift motion of cylinder barrel 241 (i.e. displacement of two joint arms 22 relative to basic arm 21).

Specifically, comprehensive Fig. 1 and other relevant drawings, the three joint arms 23 are real with operating board 3 by expansion joint assembly 5 Now be hinged, i.e., three joint arms 23 are hinged with the outer arm 51 on expansion joint assembly 5, the inner arm 52 on expansion joint assembly 5 with operation Platform 3 connects, the expansion joint assembly 5 have be easy to operating board 3 further realize in the horizontal direction it is a certain degree of extension and Retraction；The basic arm 21 is hinged by support arm 4 with car body 1, i.e., basic arm 21 is hinged with support arm 4, support arm 4 and car body Associated components on 1 are flexibly connected；In addition, being provided with amplitude oil cylinder 6 between basic arm 21 and support arm 4, it can cause basic arm 21st, support arm 4 and the amplitude oil cylinder 6 that is connected with each other with it also constitute a stable triangular structure, and then cause the high-altitude Job platform is in operation with higher stability and safety.

When aerial work platform need to rise arm operation, two joint arms 22 in the flexible transmission component 2 of control are stretched with three joint arms 23 Go out, now, can synchronously stretch out under the drive of three joint arms 23 with the operating board 3 of the connection of flexible transmission component 2, meanwhile, it is also controllable Make related amplitude oil cylinder 6, support arm 4 and expansion joint assembly 5 to adjust extension angle or the position of associated arm, until operation Platform 3 reaches default operating position or maximum extension stroke.

In the same manner, two joint arms 22 and three joint arms when aerial work platform need to receive arm operation, in the flexible transmission component 2 of control 23 retractions, now, can synchronously bounce back with the operating board 3 of the connection of flexible transmission component 2 under the drive of three joint arms 23, meanwhile, also Can control related amplitude oil cylinder 6, support arm 4 and expansion joint assembly 5 to adjust angle or the position of associated arm, until operation Platform 3 bounces back to default operating position or original non-extension state.

Additionally, referring to accompanying drawing 13, another embodiment of aerial work platform of the present utility model, the reality are there is disclosed Apply example is with the difference of above-described embodiment：Support member between the flexible transmission component 2 and expansion joint assembly 5 is Amplitude oil cylinder 57, i.e., substitute the one-level leveling associated components in above-described embodiment with the amplitude oil cylinder 57；The 3rd leveling oil Cylinder 58 is provided with the angular transducer 59 coordinated with the 3rd leveling cyclinder 58 using electric leveling mode, the oscillating cylinder 33, The hydraulic leveling mode in above-described embodiment in two grades of leveling is substituted with the electric leveling mode.

During work, can be by the flexible come real of the amplitude oil cylinder 57 between the flexible transmission component 2 and expansion joint assembly 5 The luffing up and down of existing expansion joint assembly 5；Can be by the flexible leveling to realize operating board of the 3rd leveling cyclinder 58, it is ensured that behaviour Make platform and be in horizontality all the time.

Specifically, a certain position of operating board 3 is preset as zero-bit by the angular transducer 59 on oscillating cylinder 33, In the amplitude changing process of expansion joint assembly 5, the angular transducer 59 can transmit the signal of telecommunication to corresponding controller, and controller receives letter Corresponding control instruction can be sent after number, to control the flexible leveling so as to realize operating board of the 3rd leveling cyclinder 58, i.e. control behaviour Make platform 3 and be in default zero-bit all the time.

To sum up, not only there is the expansion joint assembly in this utility model larger level to stretch away from making operating board in level Farther region, and then the working range of increase aerial work platform are can extend on face, and the expansion joint assembly has There is higher structural strength and structural stability, the safety in utilization of aerial work platform can be greatly enhanced.

Although having been illustrated with some exemplary embodiments of the present utility model above, those skilled in the art will Understand, in the case of without departing from principle of the present utility model or spirit, these exemplary embodiments can be made a change, this The scope of utility model is limited by claim and its equivalent.

Claims (10)

1. a kind of expansion joint assembly, for the flexible transmission component on aerial work platform to be telescopically connected with operating board Get up, it is characterised in that the expansion joint assembly includes：Outer arm, it is slidably arranged in the outer arm and can be from described outer Inner arm that one end of arm is stretched out and the forearm telescopic oil cylinder being arranged between the outer arm and inner arm.

2. expansion joint assembly as claimed in claim 1, it is characterised in that the forearm telescopic oil cylinder includes cylinder body and slip The piston rod being arranged in the cylinder body, the cylinder body is fixed on the outer arm, and the external part of the piston rod is fixed in institute State on inner arm.

3. expansion joint assembly as claimed in claim 2, it is characterised in that the cylinder body is fixed on the outer wall of the outer arm, The external part of the piston rod is fixed on the outer wall of the inner arm.

4. a kind of aerial work platform, it is characterised in that include：Car body, flexible transmission component, the such as right being flexibly connected successively Require the expansion joint assembly and operating board described in 1～3 any one；Between the car body and flexible transmission component and flexible transmission Support member is all provided between component and expansion joint assembly.

5. aerial work platform as claimed in claim 4, it is characterised in that the flexible transmission component and expansion joint assembly Between support member be amplitude oil cylinder.

6. aerial work platform as claimed in claim 4, it is characterised in that the flexible transmission component and expansion joint assembly Between support member be the first leveling cyclinder；The one end being connected with the flexible transmission component on the expansion joint assembly is hinged There is small arm head；One end of first leveling cyclinder is hinged with flexible transmission component, and the other end is hinged with the small arm head.

7. aerial work platform as claimed in claim 6, it is characterised in that the expansion joint assembly also includes forearm luffing Oil cylinder, one end and the small arm head of the forearm amplitude oil cylinder are hinged, and the other end is hinged with the outer wall of the outer arm so that institute State small arm head, outer arm and forearm amplitude oil cylinder and constitute a triangle amplitude mechanism.

8. aerial work platform as claimed in claim 7, it is characterised in that set between the expansion joint assembly and operating board The one end for having the 3rd leveling cyclinder, the 3rd leveling cyclinder is hinged with the inner arm, the other end be fixed in the operating board On oscillating cylinder be hinged.

9. aerial work platform as claimed in claim 8, it is characterised in that the oscillating cylinder is provided with and the 3rd leveling The angular transducer that oil cylinder coordinates.

10. aerial work platform as claimed in claim 8, it is characterised in that between the small arm head and expansion joint assembly The second leveling cyclinder is additionally provided with, one end of second leveling cyclinder is hinged with small arm head, the outer wall of the other end and the outer arm It is hinged；The cavity of second leveling cyclinder is communicated with the cavity of the 3rd leveling cyclinder by oil pipe.