CN206606977U

CN206606977U - A kind of hydraulic elevator

Info

Publication number: CN206606977U
Application number: CN201720250088.1U
Authority: CN
Inventors: 孙久江
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-03-15
Filing date: 2017-03-15
Publication date: 2017-11-03
Anticipated expiration: 2027-03-15

Abstract

The utility model discloses a kind of hydraulic elevator, including support frame, lifting platform, jacking system and security system, the jacking system includes assembly pulley, chain and at least two hydraulic cylinders, the chain is wrapped on assembly pulley, support frame as described above is followed successively by the first support beam from bottom to top, driven carriage, second support beam and column, the column is all fixed on the ground, and the column is all I-shaped structure, first support beam is located at upper position in the middle of support frame, and first support beam be provided with hydraulic cylinder, the piston rod top of the hydraulic cylinder is connected with driven carriage lower surface, U-shaped fixed mount is provided with the driven carriage upper surface, driven carriage both sides and lifting platform both sides are designed with roller, the roller is engaged with the I-shaped structure of column, assembly pulley is provided with the upside of the U-shaped fixed mount, the security system includes leveling switch, the upper limit is switched, limit switch and gate inhibition's switch.

Description

A kind of hydraulic elevator

Technical field

The utility model is related to elevator technology field, more particularly to a kind of hydraulic elevator.

Background technology

Between the architecture storey of low layer during conveying articles, generally require by some transporting equipments, the equipment commonly used at present Mainly electronic Cargo Lift, this Cargo Lift cost is high, and freight volume is small；Lifting is unstable, and security performance is low, simultaneously because counterweight is deposited Causing electronic Cargo Lift blind area too big.

As industrial land is more and more nervous, examines more and more stricter, in actual life, engender a kind of compound factory Room, but compound factory building, the problem of lifted in the presence of a dead weight cargo, for above mentioned problem, existing solution is to use hydraulic pressure Cylinder pushing type lift, but there are the following problems for hydraulic cylinder pushing type lift：

1. with the election of hydraulic cylinder, hydraulic cylinder movable end easily occurs bending or even fractureed, and causes hydraulic cylinder suitable Profit contraction or the generation of other serious accidents.

2. electing mode using hydraulic cylinder lifts goods, hydraulic cylinder travel is required, made in some multi-layer compound factory buildings Used time, hydraulic cylinder needed length is too big, causes hydraulic cylinder not install smoothly, at the same hydraulic cylinder length cause greatly production cost compared with It is high.

3. shelf are unstable during electing, it are easily caused goods and shift, triggers security incident.

Therefore hydraulic cylinder pushing type lift is not suitable for a wide range of popularization, application.

Utility model content

For above-mentioned the deficiencies in the prior art, the utility model provides a kind of hydraulic elevator, compared with prior art, The utility model drives lifting platform to decline or rise, pole by the way of assembly pulley cooperation during hydraulic cylinder extension The earth saves space, it is ensured that security.

The utility model solves the technical scheme that its technical problem used：

A kind of hydraulic elevator, including support frame, lifting platform, jacking system and security system, the jacking system include Assembly pulley, chain and at least two hydraulic cylinders, the chain are wrapped on assembly pulley, and support frame as described above is followed successively by water from bottom to top Square to two the first support beams, two driven carriages, two the second support beams and vertical direction four columns, institute Four columns are stated all to fix on the ground, and each described column is I-shaped structure, each described first support is horizontal Beam is located at upper position in the middle of support frame, and the first support beam is provided with hydraulic cylinder, the piston rod top of the hydraulic cylinder with Driven carriage lower surface is connected, and U-shaped fixed mount, driven carriage both sides and lifting platform both sides are provided with the driven carriage upper surface Roller is designed with, the roller is engaged with the I-shaped structure of column, assembly pulley is provided with the upside of the U-shaped fixed mount, it is described Security system includes leveling switch, upper limit switch, limit switch and gate inhibition's switch, and the upper limit switch and limit switch are set respectively Close to top and the position of lower end on column, gate inhibition's switch is arranged on isolating door side, and the leveling switch is arranged on Lifting platform side.

Further, first pulley, the upper and lower both ends of the surface of the second support beam point are provided with the inside of the U-shaped fixed mount Not She You second pulley and the 3rd pulley, the second pulley, first pulley and the 3rd pulley composition assembly pulley, and diameter is successively Increase.

Further, the jacking system includes two hydraulic cylinders, and the chain is divided into the first chain and the second chain, institute State two the second support beam upper surfaces and be designed with the 3rd pulley, the first support that described two hydraulic cylinders are fixed on the same side is horizontal Liang Shang, the head end of first chain and the second chain is all fixed on U-shaped fixed mount upper surface, and the first chain bypasses second successively 3rd pulley of pulley, first pulley and homonymy, and end is connected with lifting platform side, the second chain bypasses the second cunning successively Wheel, first pulley, the 3rd pulley and the 3rd pulley of opposite side of homonymy, and the end opposite side relative with lifting platform connect Connect.

Further, the jacking system includes four hydraulic cylinders, and the chain is divided into four the 3rd chains, each institute State and two hydraulic cylinders are designed with the first support beam, the head end of four the 3rd chains is all fixed on corresponding U-shaped fixed mount Upper surface, and each the 3rd chain bypasses the second pulley, first pulley and the 3rd pulley of homonymy, end and lifting platform successively Connection.

Further, the security system also includes a synchronous universal axle, and the synchronous universal axle is located at hydraulic cylinder institute Between two the 3rd pulleys of side.

Further, the security system also includes the umbrella tooth universal drive shaft that four two ends carry umbrella tooth, wherein described in two Umbrella tooth universal drive shaft is nested with two the 3rd pulleys positioned at the support frame as described above top left and right sides respectively, and the 3rd equal position of pulley In the inner side of umbrella tooth universal drive shaft both sides umbrella tooth, two umbrella tooth universal drive shafts are arranged on front and rear the two of support frame as described above top in addition Side, and umbrella tooth entrained by four umbrella tooth universal drive shaft two ends engages connection successively.

Further, in addition to the second protection device, second protection device includes Emergency rope, bolt, spring and drawing Power is switched, and is provided with bolt, the bolt upper end and Emergency rope at hydraulic cylinder base position in first support beam Head end is connected, and is wound with spring in the part of the first support beam lower end, and the spring is connected with pull switch, and the pulling force is opened Pass is connected with hydraulic cylinder circuit, and the Emergency rope is wound with chain syn-chro-step, and end is connected with lifting platform.

Further, in addition to the second protection device, second protection device is opened including Emergency rope, sketch plate and stroke Close, the sketch plate is connected with lifting platform, and two ends are connected with Emergency rope and chain respectively, and lower end is provided with supporting plate, the branch Fagging is provided with travel switch, and the travel switch is connected with sketch plate, and the Emergency rope is wound with chain syn-chro-step.

The beneficial effects of the utility model are：

1. using hydraulic cylinder the mode of goods is pulled to replace being elected the mode of goods with hydraulic cylinder in the prior art, it is complete It is complete to avoid the phenomenon that the hydraulic cylinder movable end that hydraulic cylinder is easily produced during goods is elected in the prior art bends, Improve the security performance of cargo transport；In actual application, user can need to set according to installing space and production Pulley number in assembly pulley, by successively winding of the chain on assembly pulley, can greatly shorten the stroke of hydraulic cylinder, be liquid The safe handling of cylinder pressure and transporting safely there is provided guarantee for goods；Four column bottoms are set on the ground so that whole dress Put and the ground that all acts on of gravity of goods on, it is to avoid all support beams present in existing electronic Cargo Lift, which are all acted on, builds The problem of building on framework.

2. because hydraulic cylinder is only fixed on driven carriage and the first support beam by upper and lower ends, centre is not supported Device, hydraulic cylinder is constantly in the erectility of two points one lines so that hydraulic cylinder can be adapted to more during raising, goods Gravity center shift, be that lifting platform obtains stable tension and provided convenience.

3. pass through the design increased successively second pulley, first pulley and the 3rd diameter of pulley, it is therefore prevented that chain with The problem of contacting with each other, rub between chain in pulley winding process.

4. due to coordinating between two neighboring universal drive shaft by umbrella tooth, realize cone tooth transmission, make four the 3rd pulleys of phase it Between keep synchronous, so as to ensure that lifting platform steadily rises, it is to avoid because lifting platform shifts and caused by goods movement show The generation of elephant.

5. security system is switched using leveling switch and gate inhibition, whole hydraulic elevator is only closed in isolating door, gate inhibition Switch closure can just work in the case of being powered, and improve security performance.

6. by setting the second protection device, can chain or Emergency rope are one of occur the failures such as fracture when, Another can play a part of stabilization, support, prevent violent shaking phenomenon.

The utility model pulley, which cooperates, constitutes assembly pulley, drives lifting platform to rise using hydraulic cylinder drop-down, hydraulic cylinder The flexible height of piston rod can become decline or the lifting height of lifting platform by the amplification of assembly pulley, reduce to installing The requirement in space；When being let out including hydraulic cylinder, internal pressure slowly reduces, it is to avoid electronic Cargo Lift in emergency situations brings urgency Rise the problem of plunging；When being powered off in lifting platform traveling process, by manual draining lifting platform can be made to fall earthward, protected Safety is demonstrate,proved.

Brief description of the drawings

Structural representation when accompanying drawing 1 is two hydraulic cylinders of the utility model；

The first chain, the relation of detouring of the second chain and each pulley room are shown when accompanying drawing 2 is two hydraulic cylinders of the utility model It is intended to；

Structural representation when accompanying drawing 3 is four hydraulic cylinders of the utility model；

The relation schematic diagram that detours of 3rd chain and each pulley room when accompanying drawing 4 is four hydraulic cylinders of the utility model；

Accompanying drawing 5 is bolt type the second protection device structural representation；

Accompanying drawing 6 is the board-like second protection device structural representation of abnormity；

Accompanying drawing 7 is lifting platform structural representation；

In figure, the 11, first support beam, 12, driven carriage, the 13, second support beam, 14, column, 15, roller, 2, liquid Cylinder pressure, 3, U-shaped fixed mount, 41, leveling switch, 42, upper limit switch, 43, limit switch, 44, synchronous universal axle, 45, umbrella tooth ten thousand To axle, 51, first pulley, 52, second pulley, the 53, the 3rd pulley, the 61, first chain, the 62, second chain, the 63, the 3rd chain, 71st, Emergency rope, 72, bolt, 73, spring, 74, pull switch, 75, sketch plate, 76, supporting plate, 77, travel switch, 8, lifting Platform.

Embodiment

In order to more fully understand the utility model, embodiment of the present utility model is explained in detail below in conjunction with the accompanying drawings.

As shown in accompanying drawing 1, accompanying drawing 2, accompanying drawing 5, accompanying drawing 6 and accompanying drawing 7, including support frame, lifting platform 8, jacking system and peace Total system, jacking system includes assembly pulley, chain and at least two hydraulic cylinders 2, and chain is wrapped on assembly pulley, rises and draws high work Be provided with Manual safety valve with, hydraulic cylinder 2, when occurring the emergency situations such as power-off, by operating Manual safety valve, make goods according to Gravity on one's own account is slowly brought on ground, it is ensured that safety, support frame is followed successively by two of horizontal direction from bottom to top Four columns 14 of the first support beam 11, two driven carriages 12, two the second support beams 13 and vertical direction, four are stood Post is all fixed on the ground so that on the ground that the gravity of whole device and goods is all acted on, it is to avoid existing electronic Cargo Lift The problem of existing all support beams are all acted on building frame, each column 14 is I-shaped structure, and each the One support beam 11 is located in the middle of support frame and is fixed with hydraulic cylinder 2 on upper position, and the first support beam 11, hydraulic cylinder 2 Piston rod top is connected with the lower surface of driven carriage 12, and centre is constantly in the straight of two points one lines without support meanss, hydraulic cylinder 2 Vertical state so that hydraulic cylinder can be adapted to more during raising, the gravity center shift of goods, is that lifting platform obtains stable liquid Pressure pulling force is provided convenience, and U-shaped fixed mount 3, the both sides of driven carriage 12 and the both sides of lifting platform 8 are provided with the upper surface of driven carriage 12 Roller 15 is designed with, roller 15 is engaged with the I-shaped structure of column 14, prevents lifting process from rocking amplitude excessive, add Stability, can also play a part of balance, the U-shaped upside of fixed mount 3 is provided with cunning in chain breakage, 8 run-off the straight of lifting platform Wheel group, can play a part of the adjustable height multiple that zooms in or out.

Security system includes leveling switch 41 (identical with elevator leveling switch principle of the prior art), upper limit switch 42 (extreme higher position that limitation lifting platform can reach upwards, specific executive component is limit switch), (the limitation lifting of limit switch 43 The platform extreme lower position that can reach downwards, specific executive component is limit switch), gate inhibition switch 72 and a synchronous universal axle 44, leveling switch 41, upper limit switch 42 and limit switch 43 are all connected by cable with whole control circuit, and the upper limit switchs 42 Hes Limit switch 43 is respectively provided at column close to top and the position of lower end, it is to avoid lifting platform 8 rises or falling head is excessive Cause the problem of lifting platform is damaged, gate inhibition's switch 72 is arranged on close to the side of isolating door on lifting platform 8, and leveling switch 41 is installed In the side of lifting platform 8, whole hydraulic elevator is only closed in isolating door, and the closure of gate inhibition's switch 72 just understands work in the case of being powered Make, improve security performance, synchronous universal axle 44 is located between the 3rd pulley 53, make to keep synchronous between the 3rd pulley 53, from And ensure that the steadily rising of lifting platform 8, it is to avoid because lifting platform 8 shifts and caused by goods movement phenomenon generation.

The U-shaped inner side of fixed mount 3 is provided with first pulley 51, and the upper and lower both ends of the surface of the second support beam 13 are respectively equipped with the second cunning The pulley 53 of wheel 52 and the 3rd, second pulley 52, first pulley 51 and the diameter of the 3rd pulley 53 increase successively, and three pulleys are mutual Cooperation is combined into assembly pulley, and it is chain head end falling head to realize chain end lifting height (i.e. lifting platform lifting height) The multiple of (i.e. the piston rod of hydraulic cylinder shrinks height), it is to avoid the problem of hydraulic cylinder length is excessive, is carried out according to factory building height Pulley coordinates, quantity is set, and reduces the demand to installing space, reduces cost, adds practicality.

Jacking system includes two hydraulic cylinders 2, and chain is divided into the first chain 61 and the second chain 62, and two second supports are horizontal The upper surface of beam 13 is designed with the 3rd pulley 53, and two hydraulic cylinders 2 are fixed in first support beam 11 of the same side, the first chain 61 and second the head end of chain 62 be all fixed on the upside of U-shaped fixed mount 3, the first chain 61 bypasses second pulley 52, first successively 3rd pulley 53 of pulley 51 and homonymy, and end is connected with the side of lifting platform 8；Second chain bypass successively second pulley 52, First pulley 51 and the 3rd pulley 53 of both sides, and end is connected with the opposite side of lifting platform 8, and goods is pulled using hydraulic cylinder Mode come replace in the prior art with hydraulic cylinder elect goods mode, it is entirely avoided in the prior art hydraulic cylinder elect goods The phenomenon that the hydraulic cylinder movable end easily produced during thing bends, improves the security performance of cargo transport.

Security system also includes the second protection device, and the second protection device includes Emergency rope 71, bolt 72, the and of spring 73 Pull switch 74, is provided with bolt 72, the upper end of bolt 72 and Emergency rope in the first support beam at hydraulic cylinder base position 71 head ends are connected, and Emergency rope 71 is wound with chain syn-chro-step, and end is connected with lifting platform, and in chain breakage, Emergency rope 71 can To play a part of stabilization, support, bolt 72 is wound with spring 73 in the part of the first support beam lower end, plays the work of buffering With preventing phenomenon of significantly jolting etc. suddenly, spring 73 is connected with pull switch 74, pull switch 74 and hydraulic cylinder circuit Connection, chain breakage, spring 73 shrinks, and pull switch 74 is triggered, so that hydraulic cylinder circuit is stopped.

Second protection device includes Emergency rope 71, sketch plate 75 and travel switch 77, and sketch plate 75 is connected with lifting platform 8, Two ends are connected with Emergency rope 71 and chain respectively, and lower end is provided with supporting plate 76, and supporting plate 76 is provided with travel switch 77, stroke Switch 77 is connected with sketch plate 75, and is connected by cable with control circuit, and Emergency rope 71 is wound with chain syn-chro-step, Emergency rope 71 with chain when lifting platform 8 work stress simultaneously, it is ensured that sketch plate 75 is in poised state, when one of be broken, by It is amesiality in the center of gravity of sketch plate 75, therefore the meeting run-off the straight of sketch plate 75, so that triggering travel switch 74 carries out power-off protection.

As shown in accompanying drawing 3 to accompanying drawing 7, including support frame, lifting platform 8, jacking system and security system, jacking system includes Assembly pulley, chain and at least two hydraulic cylinders 2, chain is wrapped on assembly pulley, is served and is drawn high, and hydraulic cylinder 2 is provided with manual Safety valve, when occurring the emergency situations such as power-off, by operating Manual safety valve, under making the self-dependent gravity of goods slowly Drop on ground, it is ensured that safety, support frame be followed successively by from bottom to top two the first support beams 11 of horizontal direction, two from Four columns 14 of dynamic support 12, two the second support beams 13 and vertical direction, four columns are all fixed on the ground so that On the ground that the gravity of whole device and goods is all acted on, it is to avoid all support beams present in existing electronic Cargo Lift are all acted on The problem of on building frame, each column 14 is I-shaped structure, and each first support beam 11 is located at support frame Hydraulic cylinder 2, piston rod top and the driven carriage 12 of hydraulic cylinder 2 are fixed with middle upper position, and the first support beam 11 Lower surface is connected, and centre is constantly in the erectility of two points one lines without support meanss, hydraulic cylinder 2 so that hydraulic cylinder can More adapt to during raising, the gravity center shift of goods, be that lifting platform obtains stable tension and provided convenience, from The dynamic upper surface of support 12 is provided with U-shaped fixed mount 3, and the both sides of driven carriage 12 and the both sides of lifting platform 8 are designed with roller 15, roller 15 with The I-shaped structure of column 14 is engaged, and is prevented lifting process from rocking amplitude excessive, is added stability, can also be disconnected in chain Split, play a part of balance during 8 run-off the straight of lifting platform, the U-shaped upside of fixed mount 3 is provided with assembly pulley, can play amplification or Reduce the effect of adjustable height multiple.

Security system includes leveling switch 41 (identical with elevator leveling switch principle of the prior art), upper limit switch 42 (extreme higher position that limitation lifting platform can reach upwards, specific executive component is limit switch), (the limitation lifting of limit switch 43 The platform extreme lower position that can reach downwards, specific executive component is limit switch), gate inhibition switch 72 and four umbrella tooth universal drive shafts 45, leveling switch 41, upper limit switch 42 and limit switch 43 are all connected by cable with whole control circuit, and the upper limit switchs 42 Hes Limit switch 43 is respectively provided at column close to top and the position of lower end, it is to avoid lifting platform 8 rises or falling head is excessive Cause the problem of lifting platform is damaged, gate inhibition's switch 72 is arranged on close to the side of isolating door on lifting platform 8, and electric with hydraulic cylinder 2 Road is connected by wire, and leveling switch 41 is arranged on the side of lifting platform 8, and whole hydraulic elevator is only closed in isolating door, door Prohibiting in the case that the closure of switch 72 is powered can just work, and security performance be improved, wherein two umbrella tooth universal drive shafts 45 are nested with respectively On two the 3rd pulleys 53 positioned at the support frame top left and right sides, and the 3rd pulley 53 is respectively positioned on the both sides of umbrella tooth universal drive shaft 45 The inner side of umbrella tooth, in addition two umbrella tooth universal drive shafts 45 be arranged on the front and rear sides on support frame top, and four umbrella tooth universal drive shafts 45 Umbrella tooth entrained by two ends engages connection successively, and cone tooth transmission makes to keep synchronous between four the 3rd pulleys 53 of phase, so as to Ensure that lifting platform 8 steadily rises, it is to avoid because lifting platform shifts and caused by goods movement phenomenon generation.

Jacking system includes four hydraulic cylinders 2, and chain is divided into four the 3rd chains 63, in each first support beam 11 Be designed with two hydraulic cylinders 2, the head end of four the 3rd chains 63 is all fixed on corresponding U-shaped fixed mount 3, and each the 3rd 93 articles of chain bypasses second pulley 52, the pulley 53 of first pulley 51 and the 3rd successively, and end is connected with lifting platform 8, is ensureing goods On the basis of transportation safety performance, transport capacity is increased.

Security system also includes the second protection device, and the second protection device includes Emergency rope 71, bolt 72, spring 73 and drawn Power switch 74, is provided with bolt 72, the upper end of bolt 72 and Emergency rope 71 in the first support beam at hydraulic cylinder base position Head end is connected, and Emergency rope 71 and chain syn-chro-step are wound, and end is connected with lifting platform, in chain breakage, and Emergency rope 71 can be with Play a part of stabilization, support, bolt 72 is wound with spring 73 in the part of the first support beam lower end, plays a part of buffering, Phenomenon of significantly jolting etc. suddenly is prevented, spring 73 is connected with pull switch 74, pull switch 74 and hydraulic cylinder circuit company Connect, chain breakage, spring 73 shrinks, pull switch 74 is triggered, so that hydraulic cylinder circuit is stopped.

Second protection device includes Emergency rope 71, sketch plate 75 and travel switch 77, and sketch plate 75 is connected with lifting platform 8, Two ends are connected with Emergency rope 71 and chain respectively, and lower end is provided with supporting plate 76, and supporting plate 76 is provided with travel switch 77, stroke Switch 77 is connected with sketch plate 75, and is connected by cable with control circuit, and Emergency rope 71 is wound with chain syn-chro-step, Emergency rope 71 with chain when lifting platform 8 work stress simultaneously, it is ensured that sketch plate 75 is in poised state, when one of be broken, by It is amesiality in the center of gravity of sketch plate 75, therefore the meeting run-off the straight of sketch plate 75, so that triggering travel switch carries out power-off protection.

The course of work of the present utility model：There is controller beside every layer of isolating door, floor, hydraulic pressure are selected by controller When cylinder 2 shrinks, driven carriage 12 and U-shaped fixed mount 3 is driven to move down, because the head end of chain is fixed on U-shaped fixed mount 3 On, therefore chain turns clockwise in second pulley 52, the rotate counterclockwise in first pulley 51 is suitable on the 3rd pulley 53 Hour hands are rotated, and chain end is fixedly connected with lifting platform 8, therefore lifting platform 8 can be moved up, similarly, and the work of hydraulic cylinder 2 is upheld When, lifting platform 8 is moved downward；The fixed part of leveling switch 41 is designed with per side stair, when lifting platform 8 reaches corresponding floor When, leveling switch 41 receives sensing, automatically powers off, lifting platform 8 stops；Isolating door is switched provided with gate inhibition, as long as in two gate inhibitions Switch is when contact with each other, and hydraulic cylinder 2 can just be powered work, it is ensured that security.

Stress is smaller under normal circumstances for Emergency rope 71 in the protection device of bolt type second, when chain is broken suddenly, should Anxious rope 71 can play same chain identical effect, and the spring 73 of the bottom of bolt 72 can play a part of buffering, prevent Significantly jolt etc. suddenly phenomenon；Board-like second protection device of abnormity can a fracture in Emergency rope 71 and chain, it is another The individual effect for still functioning as support, stablizing, it is more practical.

User can control the row of hydraulic cylinder 2 by increasing or reducing pulley quantity and matching relationship in assembly pulley The relation of adjustable height needed for journey and lifting platform, the stroke of hydraulic cylinder 2 is determined by factory building height, by determining maximum freight volume, And selected by the three times of maximum freight volume as the rated power progress hydraulic cylinder 2 of hydraulic cylinder 2, goods is ensure that to the full extent The security of thing transport.

Although above-mentioned the embodiment of utility model is described with reference to accompanying drawing, not to the utility model The limitation of protection domain, on the basis of the technical solution of the utility model, those skilled in the art need not pay creativeness Various modifications or deform still within protection domain of the present utility model that work can be made.

Claims

1. a kind of hydraulic elevator, including support frame, lifting platform, jacking system and security system, it is characterised in that：The lifting System includes assembly pulley, chain and at least two hydraulic cylinders, and the chain is wrapped on assembly pulley, and support frame as described above is from bottom to top It is followed successively by the four of two the first support beams, two driven carriages, two the second support beams and the vertical direction of horizontal direction Individual column, four columns are all fixed on the ground, and each described column is I-shaped structure, and each described the One support beam is located at upper position in the middle of support frame, and the first support beam is provided with hydraulic cylinder, the piston of the hydraulic cylinder Bar top is connected with driven carriage lower surface, and U-shaped fixed mount, driven carriage both sides and liter are provided with the driven carriage upper surface Drop platform both sides are designed with roller, and the roller is engaged with the I-shaped structure of column, and pulley is provided with the upside of the U-shaped fixed mount Group, the security system includes leveling switch, upper limit switch, limit switch and gate inhibition's switch, and the upper limit switch and lower limit are opened The position being respectively provided on column close to top and lower end is closed, gate inhibition's switch is arranged on isolating door side, and the flat bed is opened Close and be arranged on lifting platform side.

2. a kind of hydraulic elevator as claimed in claim 1, it is characterised in that slided on the inside of the U-shaped fixed mount provided with first Wheel, the upper and lower both ends of the surface of the second support beam are respectively equipped with second pulley and the 3rd pulley, and the second pulley, first are slided Wheel and the 3rd pulley constitute assembly pulley, and diameter increases successively.

3. a kind of hydraulic elevator as claimed in claim 2, it is characterised in that the jacking system includes two hydraulic cylinders, The chain is divided into the first chain and the second chain, and described two second support beam upper surfaces are designed with the 3rd pulley, described Two hydraulic cylinders are fixed in first support beam of the same side, and the head end of first chain and the second chain is all fixed on U Type fixed mount upper surface, the first chain bypasses the 3rd pulley of second pulley, first pulley and homonymy, and end and lifting successively Platform side is connected, and the second chain bypasses second pulley, first pulley, the 3rd pulley of homonymy and the 3rd cunning of opposite side successively Wheel, and the end opposite side connection relative with lifting platform.

4. a kind of hydraulic elevator as claimed in claim 2, it is characterised in that the jacking system includes four hydraulic cylinders, The chain is divided into four the 3rd chains, and two hydraulic cylinders, four the 3rd chains are designed with each described first support beam The head end of bar is all fixed on the upper surface of corresponding U-shaped fixed mount, and each the 3rd chain bypasses the second of homonymy and slided successively Wheel, first pulley and the 3rd pulley, end is connected with lifting platform.

5. a kind of hydraulic elevator as claimed in claim 3, it is characterised in that the security system also includes a synchronization ten thousand To axle, the synchronous universal axle is located between two the 3rd pulleys of hydraulic cylinder side.

6. a kind of hydraulic elevator as claimed in claim 4, it is characterised in that the security system also includes four two ends bands There is the umbrella tooth universal drive shaft of umbrella tooth, wherein two umbrella tooth universal drive shafts are nested with positioned at the support frame as described above top left and right sides respectively Two the 3rd pulleys on, and the 3rd pulley is respectively positioned on the inner side of umbrella tooth universal drive shaft both sides umbrella tooth, in addition two umbrella teeth ten thousand It is arranged on the front and rear sides on support frame as described above top to axle, and the umbrella tooth entrained by four umbrella tooth universal drive shaft two ends is nibbled successively Close connection.

7. a kind of hydraulic elevator as described in claim 5 or 6, it is characterised in that also including the second protection device, described Two protection devices include Emergency rope, bolt, spring and pull switch, close to cylinder bottom seat in first support beam Put place and be provided with bolt, the bolt upper end is connected with Emergency rope head end, and is wound with spring in the part of the first support beam lower end, The spring is connected with pull switch, and the pull switch is connected with hydraulic cylinder circuit, and the Emergency rope is wound with chain syn-chro-step, And end is connected with lifting platform.

8. a kind of hydraulic elevator as described in claim 5 or 6, it is characterised in that also including the second protection device, described Two protection devices include Emergency rope, sketch plate and travel switch, and the sketch plate is connected with lifting platform, two ends respectively with Emergency rope Connected with chain, and lower end is provided with supporting plate, the supporting plate is provided with travel switch, and the travel switch connects with sketch plate Connect, the Emergency rope is wound with chain syn-chro-step.