CN112850586A

CN112850586A - Bidirectional horizontal pushing type safety lifting platform

Info

Publication number: CN112850586A
Application number: CN202110010532.3A
Authority: CN
Inventors: 李代碧; 黎清弟; 马国旭
Original assignee: Chongqing Hongdingying Technology Co ltd
Current assignee: Chongqing Hongdingying Technology Co ltd
Priority date: 2021-01-06
Filing date: 2021-01-06
Publication date: 2021-05-28

Abstract

A bidirectional horizontal pushing type safe lifting platform belongs to the technical field of lifting equipment and comprises a base, a bearing platform, a fork-shaped frame group and a bidirectional horizontal pushing device, wherein the fork-shaped frame group is provided with four corners which are respectively arranged on the base and the bearing platform; the bidirectional horizontal pushing device comprises a hydraulic oil cylinder, a transfer oil bin and a hydraulic pump; the hydraulic oil cylinders are reverse piston rod hydraulic oil cylinders, the number of the hydraulic oil cylinders is two, the transfer oil bin comprises a plug oil inlet and outlet transfer bin and a plug oil inlet and outlet transfer bin, the plug oil inlet and outlet transfer bin is communicated with a plug oil port, and the plug oil inlet and outlet transfer bin is communicated with a plug oil port; the hydraulic pump is arranged at any position on the base and is communicated with the plug oil inlet and outlet transfer bin and the plug collecting oil inlet and outlet transfer bin; the lifting platform has the beneficial effects that the stability of the lifting platform can be greatly improved, the lateral pressure of the oil cylinder is avoided, the hydraulic oil cylinder is prevented from rotating in the supporting process, the safety factor is improved, and the service life is prolonged.

Description

Bidirectional horizontal pushing type safety lifting platform

Technical Field

The invention relates to the technical field of lifting equipment, in particular to a bidirectional horizontal pushing type safe lifting platform.

Background

When a building is maintained, painted and pruned to tree branches and the like, a straight ladder or a herringbone ladder is usually erected, but the treading position of the ladder is fixed, the contact area is small, and the ladder is not suitable for standing on the ladder for working for a long time; in particular, ladders tend to be unstable and prone to tipping and collapsing, causing worker injury. Therefore, it is preferable to use a lifting platform.

The existing lifting platform is a mechanical device driven by a hydraulic cylinder or a chain to lift, and generally comprises a fixed type, a movable type and a guide rail type, wherein the fixed type comprises a scissor-fork type lifting goods lift, a chain type lifter, a loading and unloading platform, an attached type electric construction platform and the like. The mobile lifting platform comprises a four-wheel mobile lifting platform, a two-wheel traction type lifting platform, an automobile refitted lifting platform, a hand-push type lifting platform, a hand-operated type lifting platform, an AC/DC dual-purpose lifting platform, a battery car-mounted type lifting platform, a self-propelled type lifting platform, a diesel engine crank arm self-propelled type lifting platform, a folding arm type lifting platform, a telescopic cylinder type lifting platform and an aluminum alloy lifting platform; in different seasons.

For example, patent document CN 108249347B discloses a stepping type moving and lifting device; the lifting mechanism is arranged in the fork-shaped frame group, four corners of the upper plane of the sliding plate are connected with four corners of the lower plane of the fork-shaped frame group through hinge seats respectively, four corners of the upper end of the fork-shaped frame group are connected with four corners of the lower plane of the panel through the hinge seats, guardrails are arranged on the periphery of the upper plane of the panel, and the lifting mechanism is arranged in the fork-shaped frame group; this scheme makes the supporting baseplate steady through the work of supporting cylinder, draws and moves cylinder work and guarantee fixture's lateral displacement, and fork shape frame and elevating system cooperation are fit for the not operation of co-altitude, convenient to use, and factor of safety is high, and stability is good, and high-order platform goes up and down and other operations in the specially adapted factory building.

In addition, patent document CN 108609556B discloses an intelligent lifting device for construction workers, including lifting base and the lifting device of setting on the lifting base and the footboard that supplies construction workers to trample on lifting device, be equipped with pressure sensor in the lifting base, the downside of lifting base is equipped with the reinforcing means who is used for strengthening base and outside ground firm in connection, pressure sensor includes that a plurality of is the detecting element of circular distribution between side and the lifting device on the lifting base. According to the intelligent lifting device for the construction worker, the effect of lifting the construction worker can be effectively realized through the arrangement of the lifting base, the lifting device and the pedal, the firmness of connection between the lifting base and the external ground can be effectively enhanced when the gravity center of the construction worker deviates through the arrangement of the pressure sensor and the reinforcing device, and the problem that the lifting base slips due to the gravity center deviation is avoided.

Patent document CN 105347247B discloses a fixed hydraulic elevator, which includes a base, a bearing platform, support arms located at two sides of the base and arranged in an internal-external cross manner, and a driving mechanism for driving the support arms to relatively expand or contract, wherein the support arms include a first support arm and a second support arm which are arranged in an internal-external cross manner from the middle part and are rotatably connected with each other, the lower end part of the first support arm is rotatably arranged on the base, and the upper end part is slidably arranged at the bottom of the bearing platform; the lower end part of the second support arm is arranged on the base in a sliding manner, and the upper end part of the second support arm is arranged at the bottom of the bearing platform in a rotating manner; the hydraulic lifter also comprises a first supporting rod for synchronously connecting the lower end parts of the second supporting arms at the two sides, and a second supporting rod for synchronously connecting the middle upper parts of the first supporting arms at the two sides, and the driving mechanism comprises a hydraulic oil cylinder and a hydraulic pump, wherein the two end parts of the hydraulic oil cylinder are respectively and rotatably arranged on the first supporting rod and the second supporting rod, and the hydraulic pump is arranged on the base and is positioned between the supporting arms at the two sides; the scheme can relatively stably realize the lifting of the bearing platform.

The above schemes have two common defects, one of which is that when the platform is lifted, the inner fork plate and the outer fork plate in the fork frame group can be contracted, so that the upper ends and the lower ends of the inner fork plate and the outer fork plate can be close to each other, and the supporting point can move towards the middle or one side, so that the stress areas of the bottom plate and the platform can be reduced, the platform becomes unstable, and the safety risk is caused; secondly, the hydraulic oil cylinder is installed in an inclined state and is almost in a horizontal state when being started, mechanical force which is several times that is needed for supporting the supporting arm is needed, and much useless work is wasted; and thirdly, a base and a piston rod of the hydraulic oil cylinder are both arranged on the fork-shaped frame group, the hydraulic oil cylinder is required to move and rotate along with the fork-shaped frame group in the lifting process, the lateral pressure of the hydraulic oil cylinder is increased invisibly, and the service life is shortened.

Disclosure of Invention

The invention aims to solve the technical problem that fork-shaped frame groups are arranged at four corners below a platform, and the positions of edge fork rods are always positioned at the corners, so that the stability of the lifting platform is improved, and the construction safety is guaranteed.

The invention aims to solve another technical problem that the driving mode is changed, and the movable supporting arm is horizontally pushed by the hydraulic oil cylinder, so that the hydraulic oil cylinder can be horizontally and fixedly arranged on the base, thereby reducing useless work, avoiding lateral pressure and reducing the burden of the hydraulic oil cylinder.

In order to solve the technical problems, the technical scheme adopted by the invention is a bidirectional horizontal pushing type safe lifting platform,

the bidirectional horizontal pushing device comprises a base, a bearing platform, a fork-shaped frame group and a bidirectional horizontal pushing device, and is characterized in that the base and the bearing platform are rectangular; the four fork frame groups are respectively a first fork frame group, a second fork frame group, a third fork frame group and a fourth fork frame group, and are respectively arranged on the upper surface of the rectangular base and four corners of the lower surface of the rectangular bearing platform; the fork-shaped frame group consists of a plurality of fork-shaped frames, each fork-shaped frame comprises a left supporting arm, a right supporting arm, a short shaft and a bearing, holes are formed in the middle and two ends of each left supporting arm and each right supporting arm, each hole is fixedly provided with the corresponding bearing, and the bearings in the middle of each left supporting arm and the corresponding right supporting arm are fixedly arranged on the same short shaft together to form the fork-shaped frame; thus manufacturing a plurality of fork-shaped frames; a bearing at the upper end of the left supporting arm of the first forked frame and a bearing at the lower end of the right supporting arm of the second forked frame are jointly and fixedly arranged on the other short shaft, and a bearing at the upper end of the right supporting arm of the first forked frame and a bearing at the lower end of the left supporting arm of the second forked frame are jointly and fixedly arranged on the other short shaft to form a forked frame group; the same fork-shaped frame group can be composed of two fork-shaped frames or a plurality of fork-shaped frames, so that four same fork-shaped frame groups are manufactured; four corners of the upper surface of the rectangular base are respectively provided with a fixed short shaft seat which is respectively a right rear short shaft seat, a right front short shaft seat, a left front short shaft seat and a left rear short shaft seat, each short shaft seat is respectively provided with a short shaft, the upper surface of the base between the right rear short shaft seat and the right front short shaft seat is dug with a right arm wheel groove, and the upper surface of the base between the left front short shaft seat and the left rear short shaft seat is dug with a left arm wheel groove; four corners of the lower surface of the rectangular bearing platform are respectively provided with a fixed short shaft seat, namely a right rear upper short shaft seat, a right front upper short shaft seat, a left front upper short shaft seat and a left rear upper short shaft seat, each short shaft seat is provided with a short shaft, the lower surface of the bearing platform between the right rear upper short shaft seat and the right front upper short shaft seat is provided with a right upper arm wheel groove in an excavating manner, and the lower surface of the bearing platform between the left front upper short shaft seat and the left rear upper short shaft seat is provided with a left upper arm wheel groove in an excavating manner.

On the upper surface of the base, a bearing at the lower end of a left supporting arm of a bottom forked frame in a first forked frame group is fixedly arranged on a short shaft of a right rear short shaft seat of the base, meanwhile, a short shaft is fixedly arranged in a bearing at the lower end of a right supporting arm of the bottom forked frame in the first forked frame group, a roller is arranged on the short shaft to serve as a first lower arm wheel, and then the first lower arm wheel is arranged in a right arm wheel groove; then fixedly mounting a bearing at the lower end of a left supporting arm of a bottom forked frame in the second forked frame group on a short shaft of a right front short shaft seat of the base, simultaneously fixedly mounting a short shaft in a bearing at the lower end of a right supporting arm of the bottom forked frame in the second forked frame group, mounting a roller on the short shaft to serve as a second lower arm wheel, and then mounting the second lower arm wheel in a right arm wheel groove; then, a bearing at the lower end of a left supporting arm of a bottom forked frame in the third forked frame group is fixedly arranged on a short shaft of a left front short shaft seat of the base, meanwhile, a short shaft is fixedly arranged in a bearing at the lower end of a right supporting arm of the bottom forked frame in the third forked frame group, a roller is arranged on the short shaft to serve as a third lower arm wheel, and then the third lower arm wheel is arranged in a left arm wheel groove; then, a bearing at the lower end of a left supporting arm of a bottom forked frame in the fourth forked frame group is fixedly arranged on a short shaft of a left rear short shaft seat of the base, meanwhile, a short shaft is fixedly arranged in a bearing at the lower end of a right supporting arm of the bottom forked frame in the fourth forked frame group, a roller is arranged on the short shaft to serve as a fourth lower arm wheel, and then the fourth lower arm wheel is arranged in a left arm wheel groove; therefore, the position of the lower end of the left support arm in the bottom fork frame in each fork frame group is always fixed, the lower end of the left support arm can only rotate on the short shaft of the short shaft seat, the lower end of the right support arm is movable, the lower arm wheel at the lower end of each right support arm can only roll in the corresponding arm wheel groove, and the right support arm can only be folded towards the left support arm by taking the left support arm as a fixed point.

On the lower surface of the bearing platform, a bearing at the upper end of a right supporting arm of a top forked frame in a first forked frame group is fixedly arranged on a short shaft of a right rear upper short shaft seat of the bearing platform, meanwhile, the short shaft is fixedly arranged in the bearing at the upper end of a left supporting arm of the top forked frame in the first forked frame group, a roller is arranged on the short shaft to serve as a first upper arm wheel, and then the first upper arm wheel is arranged in a right upper arm wheel groove; then, a bearing at the upper end of a right supporting arm of a top forked frame in the second forked frame group is fixedly arranged on a short shaft of a right front upper short shaft seat of the bearing platform, meanwhile, a short shaft is fixedly arranged in a bearing at the upper end of a left supporting arm of the top forked frame in the second forked frame group, a roller is arranged on the short shaft to serve as a second upper arm wheel, and then the second upper arm wheel is arranged in a right upper arm wheel groove; then, a bearing at the upper end of a right supporting arm of a top forked frame in the third forked frame group is fixedly arranged on a short shaft of a left front upper short shaft seat of the bearing platform, meanwhile, the short shaft is fixedly arranged in the bearing at the upper end of the left supporting arm of the top forked frame in the third forked frame group, a roller is arranged on the short shaft to serve as a third upper arm wheel, and then the third upper arm wheel is arranged in a left upper arm wheel groove; then, a bearing at the upper end of a right supporting arm of a top forked frame in the fourth forked frame group is fixedly arranged on a short shaft of a left rear upper short shaft seat of the bearing platform, meanwhile, the short shaft is fixedly arranged in the bearing at the upper end of the left supporting arm of the top forked frame in the fourth forked frame group, a roller is arranged on the short shaft to serve as a fourth upper arm wheel, and then the fourth upper arm wheel is arranged in a left upper arm wheel groove; thus, four fork frame groups are installed; therefore, the position of the upper end of the right supporting arm in the top fork frame in each fork frame group is always fixed, the upper end of the right supporting arm can only rotate on the short shaft of the corresponding upper short shaft seat, the upper end of the left supporting arm is movable, the upper arm wheel at the upper end of the left supporting arm can only roll in the corresponding upper arm wheel groove, and the left supporting arm can only be folded towards the direction of the right supporting arm by taking the right supporting arm as a fixed point.

The bidirectional horizontal pushing device comprises a hydraulic oil cylinder, a transfer oil bin and a hydraulic pump; the hydraulic cylinder is a reverse piston rod hydraulic cylinder and comprises a cylinder barrel, a left piston rod and a right piston rod which are arranged at two sides of the cylinder barrel and extend out of two ends of the cylinder barrel, and the directions of the left piston rod and the right piston rod are opposite; the two hydraulic oil cylinders are respectively a first hydraulic oil cylinder and a second hydraulic oil cylinder; the cylinder barrel of the first hydraulic oil cylinder is fixedly arranged in the middle of the right arm wheel groove, the top end of a left piston rod on the first hydraulic oil cylinder is connected to a short shaft of the first lower arm wheel, and the top end of a right piston rod on the first hydraulic oil cylinder is connected to a short shaft of the second lower arm wheel; the cylinder barrel of the second hydraulic cylinder is fixedly arranged in the middle of the left arm wheel groove, the top end of a left piston rod on the second hydraulic cylinder is connected to a short shaft of a fourth lower arm wheel, and the top end of a right piston rod of the second hydraulic cylinder is connected to a short shaft of a third lower arm wheel; the transfer oil bin is arranged on a base in the middle of a cylinder barrel of the first hydraulic oil cylinder and a cylinder barrel of the second hydraulic oil cylinder and comprises a plug oil inlet and outlet transfer bin and a plug oil inlet and outlet transfer bin, the plug oil inlet and outlet transfer bin is communicated with a plug oil port, and the plug oil inlet and outlet transfer bin is communicated with a plug oil port; the hydraulic pump is arranged at any position on the base and is communicated with the plug oil inlet and outlet transfer bin and the plug collecting oil inlet and outlet transfer bin; thus, the bidirectional horizontal pushing type safe lifting platform is assembled; the transfer oil bin is arranged to ensure that the four piston rods can enter and exit at the same speed.

The connection between each piston rod and the short shaft can be fixed connection or can be rotatably connected through a bearing.

When the hydraulic oil pump is used, after the hydraulic oil pump is started, the oil pipe inputs hydraulic oil to the transfer oil bin, the transfer oil bin simultaneously inputs the hydraulic oil into the cylinder barrel at the inner side position of the piston of the two hydraulic oil cylinders at the same speed, and simultaneously outputs the hydraulic oil from the cylinder barrel at the outer side position of the piston of the hydraulic oil cylinders at the same speed, and then the left piston rod and the right piston rod on the two hydraulic oil cylinders simultaneously extend out in a horizontal straight line in opposite directions at a constant speed, so that the lower arm wheels at the left side and the right; the lower end of a left supporting arm of a bottom forked frame of the first forked frame group is fixedly arranged on a right rear short shaft seat of the base, and the upper end of a right supporting arm of a top forked frame is fixedly arranged on a right rear upper short shaft seat of the bearing platform; meanwhile, the lower end of a left supporting arm of a bottom forked frame of the second forked frame group is fixedly arranged on a right front short shaft seat of the base, and the upper end of a right supporting arm of a top forked frame is fixedly arranged on a right front upper short shaft seat of the bearing platform; the lower end of a left supporting arm of a bottom forked frame of the third forked frame group is fixedly arranged on a left front short shaft seat of the base, and the upper end of a right supporting arm of a top forked frame is fixedly arranged on a left front upper short shaft seat of the bearing platform; the lower end of a left supporting arm of a bottom forked frame of the fourth forked frame group is fixedly arranged on a left rear short shaft seat of the base, and the upper end of a right supporting arm of a top forked frame is fixedly arranged on a left rear upper short shaft seat of the bearing platform; the lower ends of the left supporting arms of the bottom fork-shaped frames of the four fork-shaped frame groups can only rotate at the position of the fixed short shaft seat, and the lower arm wheels at the lower ends of the right supporting arms are all horizontally pushed to the short shaft seat; the upper ends of the right supporting arms of the top fork-shaped frame can only rotate at the fixed upper short shaft seat, and the upper arm wheels at the upper ends of the left supporting arms are all horizontally pushed to the upper short shaft seat; the four fork frame groups can be changed into four similar upright posts at the same time after the left supporting arm and the right supporting arm are closed, the bearing platform is supported at the top end, and the four upright posts changed from the four fork frame groups are arranged at the edges of four corners of the base and the bearing platform, so that the lifting platform has extremely high stability and far exceeds the conventional lifting platform with the supporting upright posts arranged at one side or the middle; after the existing lifting platform is lifted, the fork frame group is closed towards the middle, so that the base and the bearing platform are both partially positioned outside the supporting point, and the stability is seriously reduced. In addition, the hydraulic oil cylinder is installed in a horizontal shape, and the lower arm wheel can be transversely pushed to the short shaft seat at the corner position of the base, so that the left supporting rod and the right supporting rod are forced to be closed, the fork-shaped frame group is jacked up, compared with the existing scheme of inclined installation of the hydraulic oil cylinder, the idle work in the inclined direction can be greatly reduced, the required supporting force is reduced, the lateral pressure is avoided, the specification of the oil cylinder can be reduced, and the service life of the oil cylinder can be prolonged.

The reverse piston rod hydraulic cylinder comprises a cylinder barrel, two sets of oil storage rings, pistons, piston rods and end covers with the same specification, namely a left oil storage ring, a left piston rod, a left end cover, a right oil storage ring, a right piston rod and a right end cover; the two ends of the cylinder barrel directly generate bead ring walls with the same specification, namely a left bead ring wall and a right bead ring wall, and the inner diameter of each bead ring wall is larger than the outer diameter of the piston rod and smaller than the outer diameter of the piston; the inner diameter of the oil storage ring is smaller than the outer diameter of the piston, the left oil storage ring and the right oil storage ring are directly generated on the inner wall of the cylinder barrel, a space formed by the two oil storage rings is arranged in the middle of the cylinder barrel, and the two oil storage rings and the inner wall of the middle of the cylinder barrel form an oil storage bin; the oil storage bin has the effects that after the pistons on the left side and the right side are completely retracted, hydraulic oil still remains between the two pistons, the two pistons are prevented from being in direct contact, the situation that the oil inlet is blocked and the oil cannot be fed is avoided, and the inner diameter opening of the oil storage ring is used for circulating the hydraulic oil; a right piston is arranged in a right cylinder barrel of the right oil storage ring, a right piston rod is fixedly arranged on the right side of the right piston, a right end cover is fixedly arranged at the right end of the cylinder barrel, and the right piston rod penetrates through the right end cover; a left piston is installed in a left cylinder of the left oil storage ring, a left piston rod is fixedly installed on the left side of the left piston, a left end cover is fixedly installed on the left end of the cylinder, and the left piston rod penetrates through the left end cover; the hydraulic cylinder is characterized in that a piston oil port and a plug oil port are arranged on the cylinder barrel, the piston oil port and the plug oil port are respectively arranged at symmetrical positions of a cylinder wall in the middle of the cylinder barrel, the piston oil port is directly communicated with the oil storage bin, an in-wall oil path pipe is arranged in the cylinder wall at the plug oil port position, the in-wall oil path pipe extends towards the left end and the right end by taking the plug oil port in the middle of the cylinder wall as a starting point until reaching the bead ring walls at the left end and the right end, and the inner side wall of the bead ring wall is taken as an oil path end point.

The reverse piston rod hydraulic oil cylinder can be further arranged into a double-cylinder reverse piston rod hydraulic oil cylinder or a three-cylinder reverse piston rod hydraulic oil cylinder, so that the stroke of the piston rod can be increased under the condition that the whole oil cylinder is short.

In order to further increase the stability, the base can be enlarged, the length and the width of the base are widened, the original positions of the right rear short shaft seat, the right front short shaft seat, the left front short shaft seat and the left rear short shaft seat are unchanged, and the four fork frame groups are spaced from the edge of the base by a certain distance.

And a guardrail is also arranged above the bearing platform.

Supporting legs are arranged below the base.

And a roller foot is arranged below the base.

The supporting legs are fixed in length, the foot columns of the roller legs are telescopic foot columns, namely the roller legs are composed of foot columns and rollers, the rollers are installed at the lower ends of the foot columns, the foot columns are telescopic foot columns, and when the roller legs need to move, the foot columns can be extended, so that the overall length of the roller legs is larger than that of the supporting legs; when the roller does not need to move, the foot columns are shortened, so that the whole length of the roller foot is smaller than that of the supporting feet.

The foot post of the roller foot is an oil cylinder foot post made of a hydraulic oil cylinder, so that the foot post can be conveniently stretched.

Compared with the prior art, the invention has the following beneficial effects:

the four fork-shaped frame groups are fixedly mounted at four corner edge positions between the base and the bearing platform, and the left supporting arms of the four fork-shaped frame groups are fixedly and rotatably mounted on short shaft seats at corner positions, so that the four fork-shaped frame groups are fixedly maintained at the edge positions in an extending and contracting mode, and the stability of the lifting platform can be greatly improved.

The utility model has the advantages of two sets of fork frame group's the bottom fork frame lower extreme between the lower arm wheel of base fork frame lower extreme around having adopted reverse piston rod hydraulic cylinder to be installed reverse piston rod hydraulic cylinder with the base with the level form, can transversely push away two lower arm wheels front and back both ends, make fork frame group direct jack-up, the useless work that can significantly reduce for the tilting cylinder paid out avoids lateral pressure, also can avoid hydraulic cylinder propping the in-process rotating, can improve factor of safety, can reduce the hydro-cylinder specification again, save the resource, but increase of service life again.

Thirdly, a reverse piston rod hydraulic oil cylinder is adopted, and an oil inlet and an oil outlet of the hydraulic oil cylinder are arranged in the middle of the oil cylinder barrel, so that the oil cylinder can be ensured to eject the piston rod in opposite directions by the same force; two hydraulic oil cylinders are adopted, and a transfer oil bin is arranged between the two hydraulic oil cylinders, so that the fork-shaped frame groups in four directions can be ensured to be lifted at the same speed, and the lifting platform is ensured to be stable and safe.

The base is lengthened and widened, and the overall stability of the lifting platform is improved.

The supporting legs are set to be fixed in length, the roller legs are set to be movable in length, and the situation that the supporting legs are set to be extended in general is changed

The foot is contracted, the roller foot is set to be the habit of fixing the foot, and the service life of the roller foot can be prolonged.

Drawings

Fig. 1 is a schematic diagram of a right side view in elevation of the safety lifting platform of the present invention in a half-lifted state.

FIG. 2 is a schematic top view of a base and a surface thereof in the safety elevating platform of the present invention.

FIG. 3 is a schematic view of the axial line section structure of the reverse piston rod hydraulic cylinder of the present invention.

FIG. 4 is a schematic view of the axial line tangent plane structure of a hydraulic cylinder with a double-cylinder reverse piston rod according to the present invention.

Fig. 5 is a right side elevational view of the present invention as it would appear fully collapsed for lifting.

Fig. 6 is a right side view in elevation of the present invention immediately prior to full furling and stacking.

Fig. 7 is a schematic structural view of the forked frame of the present invention.

In the figure: 1. the device comprises a base, a bearing platform, a fork frame set, a bidirectional horizontal pushing device, a first fork frame set, a second fork frame set, a left supporting arm, a right supporting arm, a first fork frame, a right supporting arm, a left supporting arm, a right supporting arm, a left fork frame, a right supporting arm, a right fork frame, a left fork.

The hydraulic cylinder comprises a right rear short shaft seat, a right front short shaft seat, a left rear short shaft seat, a left front short shaft seat, a right arm wheel groove, a left arm wheel groove, a right rear upper short shaft seat, a right front upper short shaft seat, a bottom fork-shaped frame, a first lower arm wheel, a second lower arm wheel, a top fork-shaped frame, a left arm wheel, a right arm wheel groove, a left arm wheel groove, a right upper arm wheel, a right arm wheel groove, a right upper arm wheel, a hydraulic cylinder, a reverse piston rod hydraulic cylinder, a piston transfer oil bin, a hydraulic pump, a cylinder barrel, a piston rod, a piston oil port, a piston oil inlet/outlet transfer oil bin, a piston ring, a piston, 45. right edge ring wall, 46 oil storage bin, 47 oil pipeline in wall, 48 guardrail, 49 supporting feet, 50 roller feet, 51 foot column.

Detailed Description

The present invention is further illustrated by the following examples, which are intended to illustrate the invention but not to limit it further, and should not be construed as limiting the scope of the invention.

Example 1.

As shown in fig. 3, the reverse piston rod hydraulic ram 26 is first made. The reverse piston rod hydraulic oil cylinder 26 comprises a cylinder 29, two sets of oil storage rings with the same specification, a piston rod and an end cover, wherein the oil storage rings are respectively a left oil storage ring 38,

A left piston 39, a left piston rod 30, a left end cover 40, a right oil storage ring 41, a right piston 42, a right piston rod 31 and a right end cover 43; the outlets at two ends of the cylinder barrel 29 directly generate bead ring walls with the same specification, namely a left bead ring wall 44 and a right bead ring wall 45, and the inner diameter of the bead ring wall is larger than the outer diameter of the piston rod and smaller than the outer diameter of the piston;

the inner diameter of the oil storage ring is smaller than the outer diameter of the piston, the left oil storage ring 38 and the right oil storage ring 41 are directly generated on the inner wall of the cylinder 29, the space formed by the two oil storage rings is in the middle of the cylinder 29, and the two oil storage rings and the inner wall of the middle of the cylinder form an oil storage bin 46; a right piston 42 is installed in a right cylinder of the right oil storage ring 41, a right piston rod 31 is fixedly installed on the right side of the right piston 42, a right end cover 43 is fixedly installed at the right end of the cylinder, and the right piston rod 31 penetrates through the right end cover 43; a left piston 39 is installed in a left cylinder of the left oil storage ring 38, a left piston rod 30 is fixedly installed on the left side of the left piston 39, a left end cover 40 is fixedly installed on the left end of the cylinder 29, and the left piston rod 30 penetrates through the left end cover 40; the cylinder barrel 29 is provided with a plug oil port 32 and a plug oil port 33, the plug oil port 32 and the plug oil port 33 are respectively arranged at symmetrical positions of a cylinder wall in the middle of the cylinder barrel 29, wherein the plug oil port 32 is directly communicated with the oil storage bin 46, an in-wall oil path pipe 47 is arranged inside the cylinder wall at the plug oil port 33 position, the in-wall oil path pipe 47 extends towards the left end and the right end by taking the plug oil port 33 in the middle of the cylinder wall as a starting point, and extends to the bead ring walls at the left end and the right end, and the inner side wall of the bead ring wall is taken as an oil path terminal point. Thus, the reverse piston rod hydraulic oil cylinder of the bidirectional horizontal pushing device part required by the invention is well made.

Example 2.

As shown in fig. 1-7, a bidirectional horizontal pushing type safe lifting platform is manufactured, which comprises a base 1, a bearing platform 2, a fork frame group 3 and a bidirectional horizontal pushing device 4; the base 1 and the bearing platform 2 are both rectangular; the four fork frame groups 3 are respectively a first fork frame group 5, a second fork frame group 6, a third fork frame group 7 and a fourth fork frame group 8, and the four fork frame groups 3 are respectively arranged on the upper surface of the rectangular base 1 and four corners of the lower surface of the rectangular bearing platform 2; the fork-shaped frame group 3 is composed of a plurality of fork-shaped frames 7, each fork-shaped frame 7 comprises a left supporting arm 8, a right supporting arm 9, a short shaft and a bearing, holes are formed in the middle and two ends of each of the left supporting arm 8 and the right supporting arm 9, each hole is fixedly provided with the bearing, and the bearings in the middle of the left supporting arm 8 and the right supporting arm 9 are fixedly arranged on the same short shaft together to form the fork-shaped frame 7; thus, a plurality of fork-shaped frames 7 are manufactured; any two fork frames 7 are taken, wherein a bearing at the upper end of the left supporting arm 8 of the first fork frame 10 and a bearing at the lower end of the right supporting arm 9 of the second fork frame 11 are jointly and fixedly arranged on the other short shaft, and a bearing at the upper end of the right supporting arm 9 of the first fork frame 10 and a bearing at the lower end of the left supporting arm 8 of the second fork frame 11 are jointly and fixedly arranged on the other short shaft to form a fork frame group 3; the same fork frame group 3 can be composed of two fork frames 7, or can be composed of three or more fork frames 7, so that four same fork frame groups 3 are manufactured; four corners of the upper surface of the rectangular base 1 are respectively provided with a fixed short shaft seat, namely a right rear short shaft seat 12, a right front short shaft seat 13, a left rear short shaft seat 14 and a left front short shaft seat 15, each short shaft seat is respectively provided with a short shaft, the upper surface of the base between the right rear short shaft seat 12 and the right front short shaft seat 13 is dug with a right arm wheel groove 16, and the upper surface of the base between the left front short shaft seat 15 and the left rear short shaft seat 14 is dug with a left arm wheel groove 17; four corners of the lower surface of the rectangular bearing platform 2 are respectively provided with a fixed short shaft seat, namely a right rear upper short shaft seat 18, a right front upper short shaft seat 19, a left front upper short shaft seat and a left rear upper short shaft seat, each short shaft seat is provided with a short shaft, a right upper arm wheel groove is dug on the lower surface of the bearing platform between the right rear upper short shaft seat 18 and the right front upper short shaft seat 19, and a left upper arm wheel groove is dug on the lower surface of the bearing platform between the left front upper short shaft seat and the left rear upper short shaft seat.

On the upper surface of the base 1, a bearing at the lower end of a left supporting arm 8 of a bottom fork 20 in the first fork group 5 is fixedly arranged on a short shaft of a right rear short shaft seat 12 of the base 1, meanwhile, a short shaft is fixedly arranged in a bearing at the lower end of a right supporting arm 9 of the bottom fork 20 in the first fork group 5, a roller is arranged on the short shaft to serve as a first lower arm wheel 21, and then the first lower arm wheel 21 is arranged in a right arm wheel groove 16; then, a bearing at the lower end of a left supporting arm 8 of a bottom forked frame 20 in the second forked frame group 6 is fixedly arranged on a short shaft of a right front short shaft seat 13 of the base, meanwhile, a short shaft is fixedly arranged in a bearing at the lower end of a right supporting arm 9 of the bottom forked frame 20 in the second forked frame group 6, a roller is arranged on the short shaft to serve as a second lower arm wheel 22, and then the second lower arm wheel 22 is arranged in a right arm wheel groove 16; then, a bearing at the lower end of a left supporting arm of the bottom fork frame in the third fork frame group is fixedly arranged on a short shaft of a left front short shaft seat 15 of the base, meanwhile, a short shaft is fixedly arranged in a bearing at the lower end of a right supporting arm of the bottom fork frame in the third fork frame group, a roller is arranged on the short shaft to serve as a third lower arm wheel, and then the third lower arm wheel is arranged in a left arm wheel groove 17; then, the bearing at the lower end of the left support arm of the bottom fork in the fourth fork group is fixedly installed on the short shaft of the left rear short shaft seat 14 of the base, meanwhile, the short shaft is fixedly installed in the bearing at the lower end of the right support arm of the bottom fork in the fourth fork group, a roller is installed on the short shaft to serve as a fourth lower arm wheel, and then the fourth lower arm wheel is arranged in the left arm wheel groove 17.

On the lower surface of the bearing platform 2, a bearing at the upper end of a right supporting arm 9 of a top fork 23 in the first fork group 5 is fixedly arranged on a short shaft of a right rear upper short shaft seat 18 of the bearing platform 2, meanwhile, a short shaft is fixedly arranged in a bearing at the upper end of a left supporting arm 8 of the top fork 23 in the first fork group 5, a roller is arranged on the short shaft to serve as a first upper arm wheel 24, and then the first upper arm wheel 24 is arranged in a right upper arm wheel groove; then the second set of forks 6 is loaded

The bearing at the upper end of the right supporting arm 9 of the top fork frame 23 in the second fork frame group 6 is fixedly arranged on the short shaft of the right front upper short shaft seat 19 of the bearing platform 2, the short shaft is fixedly arranged in the bearing at the upper end of the left supporting arm 8 of the top fork frame 23 in the second fork frame group 6, a roller is arranged on the short shaft to serve as a second upper arm wheel 25, and the second upper arm wheel 25 is arranged in the right upper arm wheel groove; then, a bearing at the upper end of a right supporting arm of a top forked frame in the third forked frame group is fixedly arranged on a short shaft of a left front upper short shaft seat of the bearing platform, meanwhile, the short shaft is fixedly arranged in the bearing at the upper end of the left supporting arm of the top forked frame in the third forked frame group, a roller is arranged on the short shaft to serve as a third upper arm wheel, and then the third upper arm wheel is arranged in a left upper arm wheel groove; then, a bearing at the upper end of a right supporting arm of the top forked frame in the fourth forked frame group is fixedly arranged on a short shaft of a left rear upper short shaft seat of the bearing platform, meanwhile, the short shaft is fixedly arranged in the bearing at the upper end of the left supporting arm of the top forked frame in the fourth forked frame group, a roller is arranged on the short shaft to serve as a fourth upper arm wheel, and then the fourth upper arm wheel is arranged in a left upper arm wheel groove.

The bidirectional horizontal pushing device 4 comprises a hydraulic oil cylinder 26, a transfer oil bin 27 and a hydraulic pump 28; the hydraulic oil cylinder 26 is a reverse piston rod hydraulic oil cylinder 26 and comprises a cylinder barrel 29, and a left piston rod 30 and a right piston rod 31 which are arranged on two sides of the cylinder barrel 29 and extend out of two ends of the cylinder barrel and have opposite directions, and the middle part of the cylinder barrel 29 is respectively provided with a plug pushing oil port 32 and a plug collecting oil port 33; two hydraulic oil cylinders 26 are arranged, namely a first hydraulic oil cylinder 34 and a second hydraulic oil cylinder 35; the cylinder barrel of the first hydraulic oil cylinder 34 is fixedly arranged in the middle of the right arm wheel groove 16, the top end of a left piston rod 30 on the first hydraulic oil cylinder 34 is connected to a short shaft of the first lower arm wheel 21, and the top end of a right piston rod 31 on the first hydraulic oil cylinder 34 is connected to a short shaft of the second lower arm wheel 22; the cylinder barrel of the second hydraulic cylinder 35 is fixedly arranged in the middle of the left arm wheel groove 17, the top end of a left piston rod 30 on the second hydraulic cylinder 35 is connected to a short shaft of a fourth lower arm wheel, and the top end of a right piston rod 31 of the second hydraulic cylinder 35 is connected to a short shaft of a third lower arm wheel; the transfer oil bin 27 is mounted on the base 1 at the middle position of the cylinder barrel 29 of the first hydraulic oil cylinder 34 and the cylinder barrel 29 of the second hydraulic oil cylinder 35, the transfer oil bin 27 comprises a plug oil inlet and outlet transfer bin 36 and a plug oil inlet and outlet transfer bin 37, the plug oil inlet and outlet transfer bin 36 is communicated with a plug oil port 32, and the plug oil inlet and outlet transfer bin 37 is communicated with a plug oil port 33; the hydraulic pump 28 is arranged at any position on the base 1, and the hydraulic pump 28 is communicated with a plug in-out oil transfer chamber 36 and a plug receiving in-out oil transfer chamber 37; thus, the bidirectional horizontal pushing type safe lifting platform is assembled.

The connection between each piston rod and the short shaft can be fixed connection or rotary connection through a bearing.

When the hydraulic pump 28 is started, hydraulic oil in the plug-in and oil-out transfer bin 37 flows into the plug-in and oil-out transfer bin 36, the plug-in and oil-out transfer bin 36 simultaneously inputs the hydraulic oil into the cylinder barrel at the inner side positions of the pistons of the two hydraulic oil cylinders 26 through the plug oil ports 32 at the same speed, simultaneously outputs the hydraulic oil from the cylinder barrel at the outer side positions of the pistons of the hydraulic oil cylinders 26 at the same speed and flows to the plug-in and oil-out transfer bin 37 through the plug oil ports 33, and at the moment, left and right piston rods on the two hydraulic oil cylinders 26 simultaneously extend out in a horizontal straight line in opposite directions at constant speed, so that lower arm wheels on the left and right sides are simultaneously pushed open in opposite; the lower end of a left supporting arm 8 of a bottom fork frame 20 of the first fork frame group 5 is fixedly arranged on a right rear short shaft seat 12 of the base, and the upper end of a right supporting arm 9 of a top fork frame 23 is fixedly arranged on a right rear upper short shaft seat 18 of the bearing platform 2; meanwhile, the lower end of a left supporting arm 8 of a bottom fork frame 20 of the second fork frame group 6 is fixedly arranged on a right front short shaft seat 13 of the base 1, and the upper end of a right supporting arm 9 of a top fork frame 23 is fixedly arranged on a right front upper short shaft seat 19 of the bearing platform 2; the lower end of a left supporting arm of a bottom forked frame of the third forked frame group is fixedly arranged on a left front short shaft seat of the base, and the upper end of a right supporting arm of a top forked frame is fixedly arranged on a left front upper short shaft seat of the bearing platform; the lower end of a left supporting arm of a bottom forked frame of the fourth forked frame group is fixedly arranged on a left rear short shaft seat of the base, and the upper end of a right supporting arm of a top forked frame is fixedly arranged on a left rear upper short shaft seat of the bearing platform; the lower ends of the left supporting arms 8 of the bottom fork-shaped frame 20 of the four fork-shaped frame groups 3 can only rotate at the position of a fixed short shaft seat, and the lower arm wheels at the lower ends of the right supporting arms 9 are all horizontally pushed to the short shaft seat; the upper ends of the right supporting arms 9 of the top fork-shaped frame 23 can only rotate at the fixed upper short shaft seat, and the upper arm wheels at the upper ends of the left supporting arms 8 are all horizontally pushed to the upper short shaft seat; the four fork frame groups 3 can be simultaneously changed into four similar upright posts after the left supporting arm 8 and the right supporting arm 9 are closed, the bearing platform 2 is supported at the top end, and the four upright posts changed by the four fork frame groups 3 are arranged at the edges of four corners of the base 1 and the bearing platform 2, so that the lifting platform has extremely high stability and far exceeds the conventional lifting platform with only one side or the middle supporting upright post; after the existing lifting platform is lifted, the fork frame group is closed towards the middle, so that the base and the bearing platform are both partially positioned outside the supporting point, and the stability is seriously reduced. In addition, the hydraulic oil cylinder 26 is horizontally arranged, and the lower arm wheel can be transversely pushed to the short shaft seat at the corner position of the base, so that the left support rod 8 and the right support rod 9 are forced to be closed, and the fork-shaped frame group 3 is jacked up.

Example 3.

To further increase the stability, on the basis of embodiment 2, the base 1 is enlarged, that is, the length of the base 1 is lengthened, and the width is widened; the original positions of the right rear short shaft seat 12, the right front short shaft seat 13, the left front short shaft seat 15 and the left rear short shaft seat 14 are unchanged, so that the four fork frame groups 3 are away from the edge of the base 1 by a certain distance.

In addition, a protective rail 48 is arranged above the support platform 2.

Supporting feet 49 are arranged below the base 1;

a roller foot 50 is provided under the base 1.

The supporting leg 49 is made into a fixed-length supporting leg 49, the socle 51 of the roller leg 50 is made into a telescopic socle 51, namely the roller leg 50 consists of the socle 51 and a roller, the roller is installed at the lower end of the socle 51, the socle 51 is a telescopic socle, and when the roller leg needs to move, the socle 51 can be extended, so that the whole length of the roller leg 50 is greater than that of the supporting leg 49; when the movement is not necessary, the leg 51 is shortened so that the entire length of the roller foot 50 is shorter than the length of the support foot 49.

The leg 51 of the roller foot 50 is made into an oil cylinder leg 51 made of a hydraulic oil cylinder, so that the leg 51 can be conveniently extended and contracted.

Thus, the roller 50 can be used only during moving, the supporting legs 49 with fixed length can be used during construction, construction safety can be ensured, and the supporting legs 49 with fixed length can be used during storage, so that roller fatigue can be avoided. The supporting leg 49 of the existing similar equipment is made to be telescopic, the roller leg 50 is made to be fixed in length, the roller leg is generally directly adopted during storage, and the service life of the roller leg can be shortened after a long time; if the support legs are adopted during storage, the support legs need to be extended to enable the roller feet to be separated from the ground and supported by the support legs, and the support legs under the condition are telescopic, so that the telescopic support legs can be fatigued for a long time, and the service life of the support legs can be influenced.

Further, as shown in fig. 4, the reverse piston rod hydraulic cylinder 26 may be a two-cylinder reverse piston rod hydraulic cylinder or a three-cylinder reverse piston rod hydraulic cylinder, so that the extension length of the piston rod may be increased when the overall cylinder is short.

Claims

1. A bidirectional horizontal pushing type safe lifting platform comprises a base, a bearing platform, a fork frame group and a bidirectional horizontal pushing device, and is characterized in that the base and the bearing platform are rectangular; the four fork frame groups are respectively a first fork frame group, a second fork frame group, a third fork frame group and a fourth fork frame group, and are respectively arranged on the upper surface of the rectangular base and four corners of the lower surface of the rectangular bearing platform; the fork-shaped frame group consists of a plurality of fork-shaped frames, each fork-shaped frame comprises a left supporting arm, a right supporting arm, a short shaft and a bearing, holes are formed in the middle and two ends of each left supporting arm and each right supporting arm, each hole is fixedly provided with the corresponding bearing, and the bearings in the middle of each left supporting arm and the corresponding right supporting arm are fixedly arranged on the same short shaft together to form the fork-shaped frame; thus manufacturing a plurality of fork-shaped frames; a bearing at the upper end of the left supporting arm of the first forked frame and a bearing at the lower end of the right supporting arm of the second forked frame are jointly and fixedly arranged on the other short shaft, and a bearing at the upper end of the right supporting arm of the first forked frame and a bearing at the lower end of the left supporting arm of the second forked frame are jointly and fixedly arranged on the other short shaft to form a forked frame group; the same fork-shaped frame group can be composed of two fork-shaped frames or a plurality of fork-shaped frames, so that four same fork-shaped frame groups are manufactured; four corners of the upper surface of the rectangular base are respectively provided with a fixed short shaft seat which is respectively a right rear short shaft seat, a right front short shaft seat, a left front short shaft seat and a left rear short shaft seat, each short shaft seat is respectively provided with a short shaft, the upper surface of the base between the right rear short shaft seat and the right front short shaft seat is dug with a right arm wheel groove, and the upper surface of the base between the left front short shaft seat and the left rear short shaft seat is dug with a left arm wheel groove; four corners of the lower surface of the rectangular bearing platform are respectively provided with a fixed short shaft seat, namely a right rear upper short shaft seat, a right front upper short shaft seat, a left front upper short shaft seat and a left rear upper short shaft seat, each short shaft seat is respectively provided with a short shaft, a right upper arm wheel groove is dug in the lower surface of the bearing platform between the right rear upper short shaft seat and the right front upper short shaft seat, and a left upper arm wheel groove is dug in the lower surface of the bearing platform between the left front upper short shaft seat and the left rear upper short shaft seat;

on the upper surface of the base, a bearing at the lower end of a left supporting arm of a bottom forked frame in a first forked frame group is fixedly arranged on a short shaft of a right rear short shaft seat of the base, meanwhile, a short shaft is fixedly arranged in a bearing at the lower end of a right supporting arm of the bottom forked frame in the first forked frame group, a roller is arranged on the short shaft to serve as a first lower arm wheel, and then the first lower arm wheel is arranged in a right arm wheel groove; then fixedly mounting a bearing at the lower end of a left supporting arm of a bottom forked frame in the second forked frame group on a short shaft of a right front short shaft seat of the base, simultaneously fixedly mounting a short shaft in a bearing at the lower end of a right supporting arm of the bottom forked frame in the second forked frame group, mounting a roller on the short shaft to serve as a second lower arm wheel, and then mounting the second lower arm wheel in a right arm wheel groove; then, a bearing at the lower end of a left supporting arm of a bottom forked frame in the third forked frame group is fixedly arranged on a short shaft of a left front short shaft seat of the base, meanwhile, a short shaft is fixedly arranged in a bearing at the lower end of a right supporting arm of the bottom forked frame in the third forked frame group, a roller is arranged on the short shaft to serve as a third lower arm wheel, and then the third lower arm wheel is arranged in a left arm wheel groove; then, a bearing at the lower end of a left supporting arm of a bottom forked frame in the fourth forked frame group is fixedly arranged on a short shaft of a left rear short shaft seat of the base, meanwhile, a short shaft is fixedly arranged in a bearing at the lower end of a right supporting arm of the bottom forked frame in the fourth forked frame group, a roller is arranged on the short shaft to serve as a fourth lower arm wheel, and then the fourth lower arm wheel is arranged in a left arm wheel groove;

on the lower surface of the bearing platform, a bearing at the upper end of a right supporting arm of a top forked frame in a first forked frame group is fixedly arranged on a short shaft of a right rear upper short shaft seat of the bearing platform, meanwhile, the short shaft is fixedly arranged in the bearing at the upper end of a left supporting arm of the top forked frame in the first forked frame group, a roller is arranged on the short shaft to serve as a first upper arm wheel, and then the first upper arm wheel is arranged in a right upper arm wheel groove; then, a bearing at the upper end of a right supporting arm of a top forked frame in the second forked frame group is fixedly arranged on a short shaft of a right front upper short shaft seat of the bearing platform, meanwhile, a short shaft is fixedly arranged in a bearing at the upper end of a left supporting arm of the top forked frame in the second forked frame group, a roller is arranged on the short shaft to serve as a second upper arm wheel, and then the second upper arm wheel is arranged in a right upper arm wheel groove; then, a bearing at the upper end of a right supporting arm of a top forked frame in the third forked frame group is fixedly arranged on a short shaft of a left front upper short shaft seat of the bearing platform, meanwhile, the short shaft is fixedly arranged in the bearing at the upper end of the left supporting arm of the top forked frame in the third forked frame group, a roller is arranged on the short shaft to serve as a third upper arm wheel, and then the third upper arm wheel is arranged in a left upper arm wheel groove; then, a bearing at the upper end of a right supporting arm of a top forked frame in the fourth forked frame group is fixedly arranged on a short shaft of a left rear upper short shaft seat of the bearing platform, meanwhile, the short shaft is fixedly arranged in the bearing at the upper end of the left supporting arm of the top forked frame in the fourth forked frame group, a roller is arranged on the short shaft to serve as a fourth upper arm wheel, and then the fourth upper arm wheel is arranged in a left upper arm wheel groove;

the bidirectional horizontal pushing device comprises a hydraulic oil cylinder, a transfer oil bin and a hydraulic pump; the hydraulic cylinder is a reverse piston rod hydraulic cylinder and comprises a cylinder barrel, a left piston rod and a right piston rod which are arranged at two sides of the cylinder barrel and extend out of two ends of the cylinder barrel, and the directions of the left piston rod and the right piston rod are opposite; the two hydraulic oil cylinders are respectively a first hydraulic oil cylinder and a second hydraulic oil cylinder; the cylinder barrel of the first hydraulic oil cylinder is fixedly arranged in the middle of the right arm wheel groove, the top end of a left piston rod on the first hydraulic oil cylinder is connected to a short shaft of the first lower arm wheel, and the top end of a right piston rod on the first hydraulic oil cylinder is connected to a short shaft of the second lower arm wheel; the cylinder barrel of the second hydraulic cylinder is fixedly arranged in the middle of the left arm wheel groove, the top end of a left piston rod on the second hydraulic cylinder is connected to a short shaft of a fourth lower arm wheel, and the top end of a right piston rod of the second hydraulic cylinder is connected to a short shaft of a third lower arm wheel; the transfer oil bin is arranged on a base in the middle of a cylinder barrel of the first hydraulic oil cylinder and a cylinder barrel of the second hydraulic oil cylinder and comprises a plug oil inlet and outlet transfer bin and a plug oil inlet and outlet transfer bin, the plug oil inlet and outlet transfer bin is communicated with a plug oil port, and the plug oil inlet and outlet transfer bin is communicated with a plug oil port; the hydraulic pump is installed in any position on the base, and the hydraulic pump is communicated with the plug to enter and exit the oil transfer bin and the plug to receive the plug to enter and exit the oil transfer bin.

2. The bidirectional horizontal pushing type safety lifting platform as claimed in claim 1, wherein the attachment between each piston rod and the short shaft may be a fixed attachment or a rotatable attachment through a bearing.

3. The bidirectional horizontal pushing type safe lifting platform according to claim 2, wherein the reverse piston rod hydraulic cylinder comprises a cylinder barrel and two sets of oil storage rings, pistons, piston rods and end covers with the same specification, namely a left oil storage ring, a left piston rod, a left end cover, a right oil storage ring, a right piston rod and a right end cover; the two ends of the cylinder barrel directly generate bead ring walls with the same specification, namely a left bead ring wall and a right bead ring wall, and the inner diameter of each bead ring wall is larger than the outer diameter of the piston rod and smaller than the outer diameter of the piston; the inner diameter of the oil storage ring is smaller than the outer diameter of the piston, the left oil storage ring and the right oil storage ring are directly generated on the inner wall of the cylinder barrel, a space formed by the two oil storage rings is arranged in the middle of the cylinder barrel, and the two oil storage rings and the inner wall of the middle of the cylinder barrel form an oil storage bin; a right piston is arranged in a right cylinder barrel of the right oil storage ring, a right piston rod is fixedly arranged on the right side of the right piston, a right end cover is fixedly arranged at the right end of the cylinder barrel, and the right piston rod penetrates through the right end cover; a left piston is installed in a left cylinder of the left oil storage ring, a left piston rod is fixedly installed on the left side of the left piston, a left end cover is fixedly installed on the left end of the cylinder, and the left piston rod penetrates through the left end cover; the oil storage device is characterized in that a push piston oil port and a plug collecting oil port are arranged on the cylinder barrel and are respectively arranged at symmetrical positions of a cylinder wall in the middle of the cylinder barrel, the push piston oil port is directly communicated with the oil storage bin, an in-wall oil path pipe is arranged inside the cylinder wall at the position of the plug collecting oil port, the in-wall oil path pipe extends towards the left end and the right end by taking the plug collecting oil port in the middle of the cylinder wall as a starting point until reaching the bead ring walls at the left end and the right end, and the inner side wall of the bead ring wall is taken as an oil path terminal point.

4. A bi-directional horizontal pushing type safety elevating platform according to claim 3, wherein the reverse piston rod hydraulic cylinder is further configured as a two-cylinder reverse piston rod hydraulic cylinder or a three-cylinder reverse piston rod hydraulic cylinder.

5. The bi-directional horizontal pushing type safety elevating platform as claimed in claim 4, wherein the base is widened in length and width, and the right rear short shaft seat, the right front short shaft seat, the left front short shaft seat and the left rear short shaft seat are fixed in position, so that the four fork sets are spaced apart from the edge of the base.

6. A bi-directional horizontal pushing type safety elevating platform as claimed in claim 5, wherein a guardrail is further provided above the carrying platform.

7. The bidirectional horizontal pushing type safe lifting platform as claimed in claim 6, wherein supporting feet are provided under the base.

8. The bidirectional horizontal pushing type safety lifting platform as claimed in claim 7, wherein a roller foot is provided under the base.

9. The bidirectional horizontal pushing type safety lifting platform as claimed in claim 8, wherein the supporting legs are fixed length supporting legs, and the legs of the roller legs are telescopic legs, i.e. the roller legs are composed of legs and rollers, the rollers are mounted at the lower ends of the legs, and the legs are telescopic legs.

10. A bi-directional laterally-pushed safety elevating platform as claimed in claim 9, wherein said leg of said roller foot is a cylinder leg made of a hydraulic cylinder.