CN208772716U - A kind of single hydraulic cylinder lifting board - Google Patents

Abstract

The utility model discloses a kind of single hydraulic cylinders to go up and down board, including firm banking, hoistable platform, driving assembly, VTOL function guidance set, hoistable platform setting is square on the fixed base, and move back and forth it along the vertical direction by driving assembly and VTOL function guidance set, driving assembly includes at least two lift drive shafts, at least one driving member and a hydraulic cylinder, hydraulic cylinder is mounted on the side of the firm banking parallel with lift drive shaft, the piston rod of hydraulic cylinder with to cover cam on lift drive shaft hinged, lift drive shaft is driven to do come back rotation by the stretching motion of piston rod.The utility model uses single hydraulic cylinder as driving device, be not in because multiple hydraulic cylinders move it is asynchronous due to cause hoistable platform stuck problem, structure is simple, it is stable, improve production efficiency, reduce cost.

Description

A kind of single hydraulic cylinder lifting board

Technical field

The utility model relates to a kind of hoistable platform technical fields, and in particular to a kind of hoistable platform of list hydraulic-driven.

Background technique

With popularizing for laser cutting technique application in recent years, people propose the processing efficiency of laser cutting machine higher Requirement.Overwhelming majority laser cutting machine all goes up and down board using the double-deck switch type at present, when one layer in double layer working bench When machining area is processed, feeding and blanking work, two layers of workbench exchange can be completed on other one layer of workbench Using feeding, discharge waiting time of machine halt can be reduced, the working efficiency of equipment is largely improved.

The double-deck switch type lifting board of existing laser cutting machine generallys use four or six hydraulic cylinders are gone straight up to It lands vertically, and this multi-hydraulic-cylinder lifting board comes with some shortcomings in actual use:

1, poor synchronization influences in production usually because hydraulic cylinder quantity is more, unbalance loading is asynchronous and causes equipment stuck Manufacturing schedule.

2, hydraulic system is complex, needs simultaneously using multiple hydraulic cylinders, equipment cost is high.

Utility model content

In order to solve the above technical problems, the list that the purpose of this utility model is to provide a kind of structures is simple, stability is good Hydraulic elevating platform replaces multi-hydraulic-cylinder by using single hydraulic cylinder, solves the hoistable platform knot of multi-hydraulic-cylinder in the prior art Structure is complicated, is easy the problem for causing hoistable platform stuck because hydraulic cylinder is asynchronous.

A kind of single hydraulic cylinder lifting board, including firm banking, hoistable platform, driving assembly, VTOL function guiding group Part, the hoistable platform setting is square on the fixed base, and the driving component and the VTOL function guidance set make institute Hoistable platform to be stated to move up and down along the vertical direction, the driving component includes lift drive shaft, driving member and a hydraulic cylinder, The lift drive shaft includes a driving shaft and at least one driven shaft, and the driving shaft and the driven shaft are parallel to each other simultaneously It is driven by the driving member, the lift drive shaft is horizontally installed between the two sides of the firm banking, and by described Bearing seat supports on firm banking two sides, the both ends of the lift drive shaft are respectively arranged with a swing rod, the swing rod One end connect with the end vertical of the lift drive shaft, the other end of the swing rod is provided with idler wheel, when the swing rod When swing, the idler wheel is rolled in hoistable platform two sides bottom；The hydraulic cylinder is mounted on the side of the firm banking Bian Shang, the piston rod of the hydraulic cylinder and the cam being fixed on the driving shaft are hinged, pass through the flexible driving institute of piston rod It states lift drive shaft and carrys out back rotation.

It is arranged in this way, the firm banking is used to support the hoistable platform, and the hoistable platform rises as vertical The main body of drop movement is for carrying cutting material frame, and the driving component is for driving and supporting the hoistable platform to do lifting fortune Dynamic, the VTOL function component is only gone up and down in vertical direction for limiting the hoistable platform.

The firm banking is generally plane frame structure made of welded steel, and the hoistable platform is generally steel weldering The frame of hollow frame structure made of connecing, the hoistable platform front and rear sides is set as channel steel, the hoistable platform or so Two sides are set as square tube, and the channel steel is stacked and is welded on the square tube, form two planes up and down, the side of the left and right sides Pipe is for being fixedly connected with the channel steel of front and rear sides, and front and rear sides channel steel is for placing cutting material frame, and the channel steel of front and rear sides needs There is enough height, in order to place the second cutting material frame on the side wall of channel steel, for carrying the second cutting material The structure of frame is known as the second material carrier platform, and the first cutting material frame is placed in the upper surface of the channel steel, for carrying first cutting The structure of material frame is known as the first material carrier platform, and the surface of second material carrier platform is arranged in first material carrier platform, and described first cuts Material cutting frame and the second cutting material frame structure are identical with size.

The support construction of the hoistable platform is fixed on the both ends of the lift drive shaft, because the utility model only has one A hydraulic cylinder, therefore a driving shaft is only needed, but a driving shaft can not smoothly be lifted the hoistable platform, therefore extremely It is few also to need a driven shaft, and increase the driving member of respective numbers, the driving shaft and the driven shaft are separately mounted to Close to the position of the two sides of the firm banking, the hoistable platform can be smoothly supported substantially, it is on this basis to increase more Driven shaft is simultaneously uniformly distributed in it on firm banking, can be further improved stabilization when hoistable platform lifting Property.

The two sides of the firm banking are fixedly installed with bearing block, and the both ends of the lift drive shaft are each passed through two sides The bearing hole of bearing block is simultaneously bonded with the inner ring of the bearing block, when the lift drive shaft rotation when, the bearing block it is interior Circle is rotated relative to bearing ball.

The both ends of the lift drive shaft are respectively arranged with swing rod after passing through the bearing block, pass through the lift drive shaft Rotation drives the swing rod to swing, to support the hoistable platform to move up and down, therefore the swing rod and the lifting are driven The both ends of moving axis must be fixedly connected with relationship, can be fixed by modes such as welding, screws；Other the one of the swing rod End is provided with idler wheel, and when the swing rod is swung, the idler wheel is rolled in the lower surface of the hoistable platform, is subtracted by the way that idler wheel is arranged Small frictional force between the swing rod and the hoistable platform upper surface.

The hydraulic cylinder is arranged close on the side of the firm banking of the driving shaft, to facilitate short distance control Driving shaft is fixed with cam on the driving shaft, and the piston rod of the hydraulic cylinder is vertical with the driving shaft, the piston rod with The cam is hinged, and flexible by piston rod makes the driving shaft come back rotation, because the utility model is only with one Hydraulic cylinder, in order to provide enough driving forces, the utility model uses opposite multi-hydraulic-cylinder lifting board more large-diameter Hydraulic cylinder guarantees enough lifting driving forces；The hydraulic cylinder controls its piston rod by controller and stretches, and the controller is set Two stall positions are determined, described two stall positions respectively correspond two positions before the hoistable platform rises and after rising It sets, stops action when the piston rod activity is to the stall position, continuation activity again, activity are arrived after time rating of having paused It pauses again when next stall position, the lifting and steel plate handling of the lifting board, the work of the piston rod is completed with this Dynamic process is the lifting process of the hoistable platform, and the dead time is the process that the hoistable platform loads and unloads steel plate.

Go up and down the course of work of board: as the lifting board of laser cutting machine, the lifting board only needs Lifting switching is carried out between two stations, the elevating movement by going up and down board makes the first cutting material frame and described the Two cutting material framves respectively reach laser cutting station；When the lifting board does not rise also, the upper of frame is expected in first cutting Apparent height is concordant with the cutting work station upper level of laser cutting machine, the steel plate to be cut on the first cutting material frame After placement, the first cutting material frame skids off from first material carrier platform and slides into the cutting work station progress laser and cuts It cuts, while the steel plate on the first cutting material frame is cut by laser, the cutting material frame of Xiang Suoshu second places steel plate, institute It is skidded off after stating the steel plate cutting on the first cutting material frame from cutting work station, slides back to first material carrier platform, then the liter Drop board rise, rise complete when described in second cutting material frame upper level and the cutting work station upper level Concordantly, the second cutting material frame level, which skids off and slides into the cutting work station, is cut by laser, and is cut through in the steel plate Cheng Zhong unloads the steel plate cut on the first cutting material frame and loads onto steel plate to be cut, the steel on the second cutting material frame Plate skids off after cutting from cutting work station, slides back to second material carrier platform, the hoistable platform decline, described first cuts Material cutting frame level skids off and slides into cutting work station and is cut by laser, and the dress of steel plate has been completed at the same time by the lifting board It unloads and cuts, effectively improve production efficiency.

Preferably, the single hydraulic cylinder lifting board is including at least VTOL function guidance set described in two groups, it is described VTOL function guidance set is set to the same side of the lifting board and is uniformly distributed.

Because hoistable platform has certain length and width, by uniformly being set in the same side of the lifting board At least two VTOL function guidance sets are set, guarantee that the wherein side of the hoistable platform can be completely in same perpendicular Upper VTOL function, to guarantee that VTOL function is also realized in the other three side of hoistable platform.

Preferably, the VTOL function guidance set include guide part and with the guide part cooperation guide rail, it is described Guide rail is fixed on the frame of the firm banking side, and the guide part is fixed on flat with the ipsilateral lifting of the guide rail On the frame of platform, the guide part does VTOL function movement on the guide rail.

Preferably, the VTOL function guidance set include guide part and with the guide part cooperation guide rail, it is described Guide rail is fixed on the frame of the hoistable platform side, and the guide part is fixed on the fixed bottom ipsilateral with the guide rail On the frame of seat, the guide part does VTOL function movement on the guide rail.

By the way that the guide rail of VTOL function guidance set and guide part are disposed on the firm banking and the lifting On platform, then limits the guide part and only do VTOL function movement on the guide rail, so that the hoistable platform can only be done The VTOL function of the relatively described firm banking moves, and above two preferred embodiment has exchanged the guide rail and the guide part Installation site, but can achieve the purpose that allow hoistable platform VTOL function.

Preferably, the guide rail includes left and right sides rail wall, the left side rail wall is equipped with first bearing group, described One bearing group includes several first bearings along guide part direction of motion setting, and the first bearing group is in the guiding The left side wall of part does relative rolling.

By being equipped with first bearing group on the left side rail wall of the guide rail, the first bearing group and the guiding are allowed Part does relative rolling to replace the left side rail wall and the guide part to do opposite sliding, reduces between VTOL function guidance set Frictional force, reduce abrasion, prolong the service life；At the same time, the first bearing group also act as the limitation guide part to The effect moved left.

Preferably, the right side rail wall of the guide rail is parallel with the right side wall of the guide part, and the right side of the guide rail Second bearing group is installed, the second bearing group includes two bearings along guide part direction of motion setting on rail wall Row, the bearing row includes several second bearings, and the right side wall of the guide part is provided with perpendicular sheet metal component, described Sheet metal component is set between described two bearing rows and does the relative rolling along the guide part direction of motion with described two bearings row.

Parallel with the right side wall of the guide part by the right side rail wall of the guide rail, the right side rail wall of the guide rail plays Limit the effect that the guide part moves right；By being provided with vertical sheet metal component on the right side of guide part, in guide rail right side rail It is provided with second bearing group on wall, the sheet metal component is allowed to do between described two bearings row along the guide part direction of motion The limitation guide part that plays the role of of relative rolling, described two bearing rows is moved forward and backward and reduces friction.

Preferably, the level that the two sides base of frame of the hoistable platform is provided with along the roller motion direction is led Rail.

It is arranged in this way, prevents idler wheel skidding when rolling, guarantees that the swing rod is parallel to always when swinging The frame of its hoistable platform supported, further increases the precision that the hoistable platform does VTOL function.

Preferably, the bottom surface of the firm banking is provided with the symmetrical lower margin of at least four.

Preferably, the lift drive shaft is formed by connecting by at least shaft coupling of two sections of drive shafts and respective numbers.

It is arranged in this way, convenient for the installation and removal of the lifting board.

Preferably, being chain drive or link transmission between the lift drive shaft.

It is arranged in this way, includes driving shaft and driven shaft in the lift drive shaft, passed by chain drive or connecting rod It is dynamic, make driving shaft that driven shaft be driven to rotate together.

Preferably, being provided on the lift drive shaft and the transmission when driving member is set as driving chain The gear of chain interoperation, the gear are equal in magnitude；It is solid on the lift drive shaft when the driving member is set as drive rod Surely it is provided with the cam hinged with the drive rod.

Compared with the existing technology, the utility model achieves beneficial technical effect: using single hydraulic cylinder as driving Device, be not in because multiple hydraulic cylinders move it is asynchronous due to cause hoistable platform stuck problem, structure is simple, operation is steady Determine, improves production efficiency, reduces cost.

Detailed description of the invention

Fig. 1 is the front view of the utility model embodiment one；

Fig. 2 is the top view of the utility model embodiment one；

Fig. 3 is the structural schematic diagram of driving assembly in the utility model embodiment one；

Fig. 4 is the structural schematic diagram of VTOL function guidance set in the utility model embodiment one.

Wherein, the technical characteristic that each appended drawing reference is referred to is as follows: 1, firm banking；2, hoistable platform；3, lower margin；4, main Moving axis；5, driven shaft；6, transmission chain；7, hydraulic cylinder；8, shaft coupling；9, bearing block；10, guide part；11, guide rail；11a, One bearing group；11b, second bearing group；12, cam；13, swing rod.

Specific embodiment

Embodiment one

With reference to Fig. 1 and Fig. 2, the lifting board, including firm banking 1, hoistable platform 2, driving assembly and go straight up to straight Guidance set drops, and the setting of hoistable platform 2 makes it above firm banking 1, and through driving assembly and VTOL function guidance set Vertically move up and down；Firm banking 1 is the rectangular frame structure being welded by channel steel, the bottom of firm banking 1 Face is uniformly equipped with 6 lower margins, is uniformly mounted on the front and rear sides frame of firm banking 1, front side frame and rear frame each 3 It is a；

The hoistable platform 2 is the hollow frame structure that channel steel is welded, the slot of 2 front and rear sides of hoistable platform Steel is stacked and is fixed on the channel steel of the left and right sides, forms two planes up and down, the channel steel of the left and right sides is for being fixedly connected The channel steel of front and rear sides, front and rear sides channel steel is for placing cutting material frame, and the channel steel of front and rear sides needs to have enough height Degree places the second cutting material frame in the upper surface of the channel steel in order to place the first cutting material frame on the side wall of channel steel, and First cutting material frame and the second cutting material frame structure are identical with size.

The spacing of 2 front and rear sides channel steel of hoistable platform is equal with the spacing of 1 front and rear sides channel steel of firm banking, and goes up and down flat The channel steel of 2 front and rear sides of platform is set to the surface of firm banking front and rear sides channel steel, enables VTOL function component vertical The front and rear sides for being mounted on firm banking and hoistable platform 2, play the role of allowing 2 VTOL function of hoistable platform.

The driving component includes two lift drive shafts, a driving chain 6 and a hydraulic cylinder 7；Two liftings are driven One is driving shaft 4 in moving axis, the other is driven shaft 5, is known as driving shaft 4 by what hydraulic cylinder 7 directly drove, passes through transmission What chain 6 directly drove is known as driven shaft 5；Driving shaft 4 and driven shaft 5 be mounted on firm banking 1 left and right sides channel steel it Between and it is in parallel；The length of driving shaft 4 and driven shaft 5 apart from left side channel steel is accounted for respectively between 1 left and right sides channel steel of firm banking Away from 5/6 and 1/6, make lift drive shaft close to the left and right sides of firm banking 1, so that hoistable platform 2 be made to accept more steady It is fixed, it is not easy to tilt because of the gravity of the left and right sides.

With reference to Fig. 3, hydraulic cylinder 7 is mounted on the channel steel on the right side of firm banking 1, the piston rod of hydraulic cylinder 7 to the left it is vertical simultaneously It is hinged with the cam that is fixed on driving shaft 4, drive driving shaft 4 to do come back rotation by the stretching motion of piston rod；Driving shaft 4 With a gear is respectively installed on the axial wall of driven shaft 5, the structure snd size of described two gears are identical, nibble between two gears The driving chain 6 for having closed a tensioning, by the driving chain 6, band while driving shaft 4 is driven and rotated by hydraulic cylinder 7 Dynamic driven shaft 5 rotates together；The driving shaft 4 and driven shaft 5 of lift drive shaft respectively include two sections of axis of two sections of axis and connection Shaft joint；The both ends of lift drive shaft are each passed through the bearing hole of 1 front and rear sides frame top chock 9 of firm banking, and two End end is fixedly installed with the swing rod 13 with idler wheel, and the idler wheel of 13 end of swing rod resists the sliding rail of 2 bottom of hoistable platform, plays branch Support the effect of hoistable platform 2；It is done by lift drive shaft come back rotation, drives swing rod 13 to do with bearing block 9 for the center of circle and carry out backswing It is dynamic, so that idler wheel be driven to roll around on the sliding rail of 2 bottom of hoistable platform, make hoistable platform 2 can be with raising and lowering.

Because the present embodiment is only with a hydraulic cylinder, in order to provide enough driving forces, the present embodiment uses half Diameter is the hydraulic cylinder of 100mm or more；The hydraulic cylinder controls its piston rod by a controller and stretches, the controller setting Two stall positions, described two stall positions respectively correspond two positions before the hoistable platform rises and after rising, It stops action when the piston rod activity is to the stall position, continuation activity again, activity are arrived down after time rating of having paused It pauses again when a stall position, the lifting and steel plate handling of the lifting board, the activity of the piston rod is completed with this Process is the lifting process of the hoistable platform, and the dead time is the process that the hoistable platform loads and unloads steel plate.

It include two groups of VTOL function guidance sets in the present embodiment, two groups of VTOL function guidance sets are respectively provided with reference to Fig. 4 In the front side for going up and down board and respectively close to two swing rods 13 on front side of lifting board；VTOL function guidance set includes leading It is fixed on the frame of 2 side of hoistable platform to part 10 and the guide rail 11 cooperated with guide part 10, guide rail 11, guide part 10 It is fixed on the frame of the firm banking 1 ipsilateral with guide rail 11, the guide part 10 is gone straight up to directly on the guide rail 11 Drop movement；Guide part 10 is set as hollow block structure, is each side welded with one piece of stiffening plate, and guide rail 11 includes a left side Right two siding track walls are equipped with first bearing group 11a on left side rail wall, and first bearing group 11a includes moving along the guide part 10 Two first bearings of direction setting, first bearing group do relative rolling, the right side of guide rail 11 in the left side stiffening plate of guide part 10 Siding track wall is equipped with second bearing group 11b, and second bearing group 11b includes two bearings along the setting of 10 direction of motion of guide part Row, two bearing rows respectively include two second bearings, are fixedly welded with perpendicular metal plate in the outer right wall of guide part 10 Part, sheet metal component are set between two bearing rows and do the relative rolling along 10 direction of motion of guide part with two bearing rows, institute Stating first bearing and the second bearing is deep groove ball bearing.

Embodiment two

Guide rail 11 includes left and right sides rail wall, is equipped with first bearing group 11a, first bearing group 11a packet on left side rail wall Two first bearings along 10 direction of motion of guide part setting are included, first bearing group is in the left side stiffening plate of guide part 10 Relative rolling is done, the right side rail wall of guide rail 11 is equipped with second bearing group 11b, and second bearing group 11b includes along the guide part Two second bearings of 10 directions of motion setting, second bearing group do relative rolling in the right side stiffening plate of guide part 10, institute It stating first bearing and the second bearing is deep groove ball bearing, first bearing group 11a limits guide part 10 to left dislocation, and Two bearing group 11b limit guide part 10 and are displaced to the right.

The level that the bottom of the front and rear sides frame of hoistable platform 2 is fixedly welded with along the roller motion direction is led Rail, the idler wheel do relative rolling in the groove of the horizontal guide rail, and by the way that the horizontal guide rail is arranged, the idler wheel can only It is displaced, cannot be displaced in the front-rear direction of the hoistable platform in the left and right directions of the hoistable platform.

The VTOL function guidance set of the present embodiment can limit the displacement of hoistable platform 2 in left and right directions, the idler wheel Cooperation between the horizontal guide rail can limit hoistable platform 2 and be displaced in the front-back direction, be reached by combining above Allow it is described lifting board VTOL function effect.

Embodiment three

The present embodiment only describes the place different from embodiment one.Guide rail 11 in the VTOL function guidance set is fixed On the frame of 1 side of firm banking, guide part 10 is fixed on the frame of the hoistable platform 2 ipsilateral with guide rail 11 On.The present embodiment has exchanged the position of guide part 10 and guide rail 11 in embodiment one, has equally achieved the effect that VTOL function.

Example IV

The present embodiment only describes the place different from embodiment one.The driving shaft 4 and the driven shaft 5 are connecting rod biography It is dynamic, respectively secure a cam on the armshaft of the driving shaft 4 and the driven shaft 5, two cams respectively with drive rod two End is hinged.The chain drive of driving shaft 4 and driven shaft 5 in embodiment one has been replaced with link transmission by the present embodiment, is equally reached Transmission effect is arrived.

Embodiment five

As more preferably embodiment, the present embodiment only describes the place different from embodiment one.The present embodiment includes four groups VTOL function guidance set, wherein two groups be set to lifting board front side, in addition two groups be set to lifting board after The VTOL function guidance set of side, front and rear sides is symmetrical.By increasing two groups of VTOL function guidance sets, liter is improved The precision of the VTOL function of board drops.

According to the disclosure and teachings of the above specification, the utility model those skilled in the art can also be to above-mentioned reality The mode of applying is changed and is modified.Therefore, the utility model is not limited to specific embodiment disclosed and described above, right Some modifications and changes of utility model should also be as falling into the protection scope of the claims of the present utility model.In addition, although It is used some specific terms in this specification, these terms are merely for convenience of description, does not constitute to utility model Any restrictions.

Claims (9)

1. a kind of single hydraulic cylinder goes up and down board, including firm banking, hoistable platform, driving assembly, VTOL function guidance set, The hoistable platform setting is square on the fixed base, and the driving component and the VTOL function guidance set make the liter Drop platform moves up and down along the vertical direction, it is characterised in that: the driving component includes lift drive shaft, driving member and one Hydraulic cylinder, the lift drive shaft include a driving shaft and at least one driven shaft, the driving shaft and the driven shaft phase Mutually parallel and be driven by the driving member, the lift drive shaft is horizontally installed between the two sides of the firm banking, And by the bearing seat supports on the firm banking two sides, the both ends of the lift drive shaft are respectively arranged with a swing rod, One end of the swing rod is connect with the end vertical of the lift drive shaft, and the other end of the swing rod is provided with idler wheel, when When the swing rod is swung, the idler wheel is rolled in hoistable platform two sides bottom；The hydraulic cylinder is mounted on the fixation On the side of pedestal, the piston rod of the hydraulic cylinder and the cam being fixed on the driving shaft are hinged, pass through stretching for piston rod Contracting drives the lift drive shaft to carry out back rotation.

2. a kind of single hydraulic cylinder according to claim 1 goes up and down board, which is characterized in that the single hydraulic cylinder lifting is handed over Zapping is set to the lifting board including at least VTOL function guidance set described in two groups, the VTOL function guidance set The same side and be uniformly distributed.

3. a kind of single hydraulic cylinder according to claim 2 goes up and down board, which is characterized in that the VTOL function guiding group Part includes that guide part and the guide rail with guide part cooperation, the guide rail are fixed on the frame of the hoistable platform side, The guide part is fixed on the frame of the firm banking ipsilateral with the guide rail, and the guide part is done on the guide rail VTOL function movement.

4. a kind of single hydraulic cylinder according to claim 3 goes up and down board, which is characterized in that the guide rail includes left and right two Siding track wall, the left side rail wall are equipped with first bearing group, and the first bearing group includes setting along the guide part direction of motion Several first bearings set, the first bearing group do relative rolling in the left side wall of the guide part.

5. a kind of single hydraulic cylinder according to claim 4 goes up and down board, which is characterized in that the right side rail wall of the guide rail It is parallel with the right side wall of the guide part, and second bearing group is installed on the right side rail wall of the guide rail, the second bearing Group includes two bearings row along guide part direction of motion setting, and the bearing row includes several second bearings, described The right side wall of guide part is provided with perpendicular sheet metal component, the sheet metal component be set between described two bearings rows and with institute It states two bearing rows and does the relative rolling along the guide part direction of motion.

6. a kind of single hydraulic cylinder lifting board described in any one according to claim 1~5, which is characterized in that the liter The two sides base of frame of drop platform is provided with the horizontal guide rail along the roller motion direction.

7. a kind of single hydraulic cylinder lifting board described in any one according to claim 1~5, which is characterized in that the liter Drop drive shaft is formed by connecting by at least shaft coupling of two sections of drive shafts and respective numbers.

8. a kind of single hydraulic cylinder lifting board described in any one according to claim 1~5, which is characterized in that the liter Drop is chain drive or link transmission between drive shaft.

9. a kind of single hydraulic cylinder according to claim 8 goes up and down board, which is characterized in that the driving member is set as passing When dynamic chain, the gear with driving chain cooperation is provided on the lift drive shaft, the gear is equal in magnitude；Work as institute When stating driving member and being set as drive rod, the cam hinged with the drive rod is fixedly installed on the lift drive shaft.