CN109869455A - Lifting platform - Google Patents
Lifting platform Download PDFInfo
- Publication number
- CN109869455A CN109869455A CN201910266765.2A CN201910266765A CN109869455A CN 109869455 A CN109869455 A CN 109869455A CN 201910266765 A CN201910266765 A CN 201910266765A CN 109869455 A CN109869455 A CN 109869455A
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- CN
- China
- Prior art keywords
- axis
- leg
- table top
- lifting platform
- torsional spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005381 potential energy Methods 0.000 claims abstract description 29
- 238000006243 chemical reaction Methods 0.000 claims abstract description 21
- 230000001737 promoting effect Effects 0.000 claims abstract description 3
- 230000005540 biological transmission Effects 0.000 claims description 30
- 230000001360 synchronised effect Effects 0.000 claims description 29
- 239000012530 fluid Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 21
- 230000008569 process Effects 0.000 abstract description 19
- 238000003860 storage Methods 0.000 abstract description 5
- 230000033001 locomotion Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B9/00—Tables with tops of variable height
- A47B9/02—Tables with tops of variable height with balancing device, e.g. by springs, by weight
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B9/00—Tables with tops of variable height
- A47B9/12—Tables with tops of variable height with flexible height-adjusting means, e.g. rope, chain
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B13/00—Details of tables or desks
- A47B13/02—Underframes
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B9/00—Tables with tops of variable height
- A47B9/10—Tables with tops of variable height with vertically-acting fluid cylinder
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B9/00—Tables with tops of variable height
- A47B9/20—Telescopic guides
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B91/00—Feet for furniture in general
- A47B91/02—Adjustable feet
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
- A47C3/20—Chairs or stools with vertically-adjustable seats
- A47C3/30—Chairs or stools with vertically-adjustable seats with vertically-acting fluid cylinder
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
- A47C3/20—Chairs or stools with vertically-adjustable seats
- A47C3/40—Telescopic guides
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
- B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
- B25H1/14—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby with provision for adjusting the bench top
- B25H1/16—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby with provision for adjusting the bench top in height
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H33/00—Gearings based on repeated accumulation and delivery of energy
- F16H33/02—Rotary transmissions with mechanical accumulators, e.g. weights, springs, intermittently-connected flywheels
- F16H33/04—Gearings for conveying rotary motion with variable velocity ratio, in which self-regulation is sought
- F16H33/06—Gearings for conveying rotary motion with variable velocity ratio, in which self-regulation is sought based essentially on spring action
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B9/00—Tables with tops of variable height
- A47B9/04—Tables with tops of variable height with vertical spindle
- A47B2009/046—Tables with tops of variable height with vertical spindle with gearbox
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Handcart (AREA)
- Transmission Devices (AREA)
- Tables And Desks Characterized By Structural Shape (AREA)
- Accommodation For Nursing Or Treatment Tables (AREA)
Abstract
The present invention provides a kind of lifting platform.Lifting platform includes table top, energy conversion device (30) and the leg assembly being connected to below table top, elastic potential energy for being converted to the auxiliary energy for promoting the table top by the energy conversion device (30), it includes torsional spring (31), axis (33) and speed changer (32), the first end of the torsional spring (31) is connected to the input part of the speed changer (32), the axis (33) is connected to the output block of the speed changer (32), the revolving speed of the input part is less than the revolving speed of the output block, the leg assembly is connected with the axis (33), the axis (33) forward or reverse during, the leg assembly shortens or extends so that the table top is down or up.Lifting platform according to the present invention, in the overall process that table top rises, the elastic potential energy incomplete release of torsional spring storage, so that the external force needed for table top from operator is smaller.
Description
Technical field
The present invention relates to field of furniture or production operation apparatus fields, and in particular to a kind of lifting that can change height
Platform, the lifting platform can behave as desk, chair, station or show stand etc., be suitable for Home furniture, office furniture, teaching desk
Chair and production operation post etc..
Background technique
Lifting platform in the prior art is usually manually operated to change the height of table top, in order to mitigate operator by operator
Task difficulty, lifting platform may include energy accumulating device (hereinafter also referred to as energy storage device).Such as make using torsional spring
For in the lifting platform of energy storage device, can by turn torsional spring, making torsional spring around own axis, a few accumulate elastic potential energy,
Later when needing table top to rise, make torsional spring release elastic potential energy to provide the auxiliary energy for helping table top to rise.With
The lifting of table top, the elastic potential energy of torsional spring and the gravitional force of table top are converted mutually.
Assuming that the table top of lifting platform (such as rises to extreme higher position (such as distance apart from ground 700mm) from extreme lower position
Ground 1200mm) range be 500mm, torsional spring needs to rotate 5 circles, the i.e. every rotation of torsional spring in the entire uphill process of table top
It turns around, table top rises 100mm.
Assuming that a length of 0.025m of the torque arm of torsional spring, torsional spring per revolution need torque 0.75Nm, that is, store elasticity
Potential energy 0.75Nm.When torsional spring turns over a circle, the torsion generated is 0.75Nm/0.025m=30N；When torsional spring turns over two
When circle, the torsion generated is 60N.
Assuming that table top full payload is 150N, the table top is now made to rise to extreme higher position from extreme lower position.Make torsional spring in advance
5 circles are turned over, the elastic potential energy of torsional spring storage is 5 × 0.75Nm=3.75Nm, and it is 150N, the torsion that torsional spring, which externally generates torsion,
Power and table top full payload balance.As soon as initial momentum upward to table top at this time, table top can rise.
When table top rises 100mm, torsional spring revolution (rotating towards the direction opposite with a preset direction) circle is released
The potential energy of the potential energy of 0.75Nm, at this time torsional spring storage is reduced to 3.75Nm-0.75Nm=3Nm, corresponding external torsion
Power is 3Nm/0.025m=120N.Table top is set to remain a constant speed rising at this time, it is necessary to which operator additionally gives table top to apply 30N
Upward power.
And so on, in order to guarantee that stablizing for table top rises, during table top persistently rises, operator applies to table top
Upward power (hereinafter referred to as external force) needs added continue to increase.When table top rises 200mm, the external force needed is 60N；When
When table top rises 400mm, the external force needed is 120N.The external force demand continued to increase is brought biggish negative to operator
Load.
Summary of the invention
It is an object of the invention to overcome or at least mitigate above-mentioned the shortcomings of the prior art, a kind of can provide is provided and is held
Continue the lifting platform of stable auxiliary force.
The present invention provides a kind of lifting platform comprising table top, the energy conversion device being connected to below table top and leg assembly,
It is characterized in that,
Elastic potential energy for being converted to the auxiliary energy for promoting the table top by the energy conversion device comprising is turned round
Spring, axis and speed changer, the first end of the torsional spring are connected to the input part of the speed changer, and the axis is connected to described
The output block of speed changer, the revolving speed of the input part are less than the revolving speed of the output block,
The leg assembly is connected with the axis, the axis forward or reverse during, the leg assembly shortens
Or elongation is so that the table top is down or up.
In at least one embodiment, the speed changer be planetary transmission comprising if gear ring, sun gear,
Dry planetary gear and planet carrier；
The gear ring is fixed, and the planet carrier connects the torsional spring as the input part, and the sun gear is as institute
It states output block and connects the axis；
The torsional spring is set in the periphery of the axis, is coaxially set with the axis.
In at least one embodiment, the speed changer includes as the gear wheel of the input part and as described
The pivot center of the pinion gear of output block, the gear wheel and the pinion gear is not conllinear.
In at least one embodiment, the lifting platform further includes the crossbeam for being fixed on the table top, and the energy turns
Changing device further includes clutch, braking fork and transmission component；
The clutch is fixed on the crossbeam, and the axis can pass through the clutch around own axis；
The braking fork is fixed on the axis, and the braking fork can selectively by the clutch locking or be released
It puts；When the braking is pitched by the clutch locking, the axis is not able to rotate；It pitches when the braking and is released by the clutch
When putting, the axis can be around own axis；
The transmission component is connected to the second end of the torsional spring, can make the torsional spring by operating the transmission component
The second end rotate to make torsional spring savings elastic potential energy relative to the first end.
In at least one embodiment, the leg assembly includes the first leg, the second leg and synchronous lifting device, institute
State the first leg can along second leg axially adjacent to or far from second leg,
The synchronous lifting device includes:
Support frame, it is in long strip；
Two ends of support frame as described above are arranged in two driving wheels；
Endless drive part is sheathed on described two driving wheels with being tensioned by described two driving wheels；With
Synchronous connector is fixed on the endless drive part；Wherein,
Endless drive part described in the middle axis connection, support frame as described above are fixedly attached to first leg, the synchronization
Connector is fixedly attached to the second leg.
In at least one embodiment, first leg is set in the periphery of second leg.
In at least one embodiment, there are two the leg assemblies, it is separately positioned on the axis of the energy conversion device
To two sides.
In at least one embodiment, the energy conversion device further includes outer short axle, and the outer short axle is in described
It the end of axis can be along mutual axially and movably nested setting with the axis.
In at least one embodiment, it is equipped with spring in the junction of the outer short axle and the axis, passes through extruding
The spring can make outer short axle close to the axis.
In at least one embodiment, the leg assembly further includes pressure cylinder, the cylinder body of the pressure cylinder and the branch
Support is fixedly connected, and the piston rod of the pressure cylinder is fixedly connected with second leg.
In at least one embodiment, the cylinder body is separated into first chamber and the second chamber by the piston of the pressure cylinder
Room, the first chamber and the second chamber are in fluid communication, and the piston rod stretches out the cylinder body from the second chamber,
The cylinder body is divided into first area and second area in the axial direction, and the second area is more leaned on than the first area
The extension end of the nearly piston rod,
In the first area, the internal diameter of the cylinder body from the first chamber on the direction of the second chamber by
Gradual change is big, and in the second area, the internal diameter of the cylinder body is from the first chamber to protecting on the direction of the second chamber
It holds constant.
Lifting platform according to the present invention, in the overall process that table top rises, the elastic potential energy incomplete release of torsional spring storage,
To which the external force from operator needed for table top is smaller.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the main part of lifting platform according to embodiment of the present invention.
Fig. 2 is the structural schematic diagram of energy conversion device according to embodiment of the present invention.
Fig. 3 and Fig. 4 is the structural schematic diagram of speed changer according to embodiment of the present invention.
Fig. 5 is the structural schematic diagram of synchronous lifting device according to embodiment of the present invention.
Fig. 6 is the structural schematic diagram of leg assembly according to embodiment of the present invention.
Fig. 7 is the signal of the part-structure of leg assembly and transverse beam assembly assembly according to embodiment of the present invention
Figure.
Fig. 8 is the structural schematic diagram of pressure cylinder according to embodiment of the present invention.
Description of symbols
10 crossbeams；
20 legs；21 first legs；22 second legs；
30 energy conversion devices；31 torsional springs；
32 speed changers；321 planet carriers；322 sun gears；323 planetary gears；324 gear rings；325 shells；
33 axis；34 outer short axles；341 springs；35 clutches；351 clutch switches；36 braking forks；37 transmission components；
371 handles；372 scales；
40 synchronous lifting devices；41 support frames；42 transmission chains；43 synchronous connectors；44 phase connectors；441 connection rings；
50 pressure cylinders；51 cylinder bodies；52 piston rods；53 pistons.
Specific embodiment
Exemplary embodiments of the present invention are described with reference to the accompanying drawings.It should be appreciated that these specific descriptions are only used for
How teaching those skilled in the art implement the present invention, rather than all feasible modes that exhaustion is of the invention, without in
It limits the scope of the invention.
Referring to Fig. 1 to Fig. 8, the specific structure and application method of lifting platform according to the present invention are introduced.
The lifting platform of present embodiment include table top (not shown), the hollow crossbeam 10 being fixed below table top,
It is contained in the energy conversion device 30 of the inner cavity of crossbeam 10, two hollow legs 20 for being fixed on 10 two sides of crossbeam, is contained in leg
The synchronous lifting device 40 and pressure cylinder 50 of 20 inner cavities.
Energy conversion device 30 is used for that (lifting part mainly to include table top, and the following are descriptions in the lifting part of lifting platform
Simplicity is also only replaced with table top when mentioning lifting part) lifting process in, providing the first auxiliary energy, (the first auxiliary is dynamic
Power), the elastic potential energy of the energy storage device savings in energy conversion device 30 can be converted to the gravitional force of table top, to mitigate
The burden of operator.
Referring to Fig. 2, energy conversion device 30 includes torsional spring 31, speed changer 32, axis 33, outer short axle 34, clutch 35, system
Moving fork 36 and transmission component 37.
Clutch 35 is fixed on crossbeam 10, and axis 33 passes through clutch 35 and can be relative to clutch 35 around itself axis
Rotation.Braking fork 36 is fixed on axis 33, so that braking fork 36 is locked by clutch 35 by clutch switch 351
Only or discharge.When braking fork 36 is discharged by clutch 35, axis 33 can rotate forward or backwards；When braking fork 36 is by clutch
When 35 locking of device, axis 33 is not able to rotate.
Torsional spring 31 is set in the periphery of axis 33, and the first end of torsional spring 31 is connected by speed changer 32 with axis 33, torsional spring
31 second end connects transmission component 37.Transmission component 37 is used to make torsional spring 31 around certainly the second end that external force passes to torsional spring 31
The axis of body rotates.In the present embodiment, transmission component 37 is worm and gear component, and transmission component 37 connects handle 371, hand
The pivot center of handle 371 is vertical with the pivot center of torsional spring 31, and external force can be passed to torsion by rotational handle 371 by operator
Spring 31.Instruction device 372 is additionally provided on the wall of crossbeam 10, the rotation amplitude of handle 371 can be shown by instruction device 372.Refer to
Showing device 372 can be mechanical pointer, be linked by the driving members such as rack-and-pinion and handle 371；It is also possible to digital table
Disk measures the rotation amplitude of handle 371 by photoelectric sensor etc..Operator could be aware that torsional spring 31 by instruction device 372
The relative size for the energy laid in.
The implementation of the savings elastic potential energy of torsional spring 31: control clutch switch 351 locks braking fork 36 by clutch 35
Only, rotational handle 371 at this time, the first end of torsional spring 31 is fixed, second end rotation.
The implementation of the release elastic potential energy of torsional spring 31: 371 locking of handle, the second end of torsional spring 31 is fixed, at this time
Clutch switch 351 is controlled, discharges braking fork 36 by clutch 35, the first end of torsional spring 31 rotates, simultaneously relative to second end
Axis 33 is driven to rotate.
Speed changer 32 connects torsional spring 31 and axis 33, so that the rotation of torsional spring 31 passes to axis 33 with being amplified.In conjunction with
Hereafter reader will appreciate that arriving, table top goes up and down a certain distance, the turnning circle of corresponding axis 33 is fixed, and if axis 33
A few are rotated, the torsional spring 31 lesser angles of rotation, then during table top rises, the elastic potential energy of torsional spring 31 is not exclusively released
It puts.For same climb, compared to the adjustment process that discharges completely of elastic potential energy of torsional spring 31, turned round in present embodiment
The change very little of auxiliary force provided by spring 31, therefore the rising of table top is more stable, the external force that needs operator dynamically to supplement
It is smaller.
Referring to Fig. 3 and Fig. 4, the specific structure of speed changer 32 according to the present embodiment introduced below and effect.In order to save
The about space of the inner cavity of crossbeam 10, and the position of axis 33 and torsional spring 31 is facilitated to be arranged, speed changer used in present embodiment
32 be planetary transmission.Speed changer 32 includes planet carrier 321,322, three 323 gear rings 324 of planetary gear of sun gear and shell
325.Planet carrier 321 is used to fix with the first end of torsional spring 31, and planetary gear 323 can around own axis be fixed on planet carrier
321.Axis 33 extends axially through sun gear 322 and does not connect rotatably with sun gear 322.The periphery of gear ring 324 has
There are several notches, these notches can be with the male cooperation in shell 325, so that gear ring 324 is fixed by shell.
The operation process of speed changer 32 has corresponded to the process that torsional spring 31 discharges elastic potential energy.During this, gear ring 324 is not
Dynamic, actively, sun gear 322 is passive for planet carrier 321, realizes the transmission effect from planet carrier 321 to the acceleration of sun gear 322.
Next by taking the transmission ratio (i.e. revolving speed (angular speed) compares) between planet carrier 321 and sun gear 322 is 1:10 as an example,
Illustrate that the present invention installs the benefit of speed changer 32 additional.Auxiliary support to table top discussed herein puts aside the cylinder hereafter recorded
The influence of component.
Assuming that a length of 0.025m of the torque arm of torsional spring 31,31 per revolution of torsional spring, need torque 7.5Nm, that is, store
Potential energy 7.5Nm.Therefore, 31 per revolution of torsional spring is 7.5Nm/ by the power that speed changer 32 is transmitted to axis 33
0.025m/10=30N.
The table top that load for needing to rise 500mm is 150N, it is assumed that 33 per revolution of axis, table top rise
100mm.When defining original state, torsional spring 31, which is preset, rotates in the forward direction 5 circles, and torsional spring 31 is made to store 5 × 7.5Nm=of elastic potential energy
37.5Nm is 37.5Nm/0.025m/10=150N by the power that speed changer 32 is transmitted to axis 33.Pass through torsional spring at this time
31 are supplied to the load balance of the support force of table top and table top, can be with by giving table top one small upward initial momentum
Increase table top.
After table top rises 100mm, 1 circle of the rotation of axis 33, torsional spring 31 is towards the reverse rotation opposite with preset direction of rotation
1/10 circle (36 °), torsional spring 31 discharge elastic potential energy 7.5Nm × 1/10=0.75Nm.The elastic potential that torsional spring 31 stores at this time
It can be reduced to 37.5Nm-0.75Nm=36.75Nm, torsional spring 31 is reduced to by the power that speed changer 32 is transmitted to axis 33
36.75Nm/0.025m/10=147N.Compared to original state, reduced by the support force that torsional spring 31 is supplied to table top
3N.Operator is only needed additionally to provide the upward external force of 3N to table top at this time, table top just remains at the uniform velocity rise.
And so on, when table top rises 200mm, the external force needed is 6N；When table top rises 400mm, need
External force be 12N.When table top rises 500mm, torsional spring 31 reversely rotates 5/10 circle (180 °) altogether, discharges elastic potential energy
3.75Nm, the elastic potential energy that torsional spring 31 stores at this time are reduced to 37.5Nm-3.75Nm=33.75Nm, and torsional spring 31 is logical
It crosses speed changer 32 and is transmitted to the power of axis 33 and be reduced to 33.75Nm/0.025m/10=135N.Compared to original state, pass through
The support force that torsional spring 31 is supplied to table top reduces only 15N.
Therefore, compared with the prior art in do not use speed changer 32 scheme, table top rise 500mm during, behaviour
The external force that author provides greatly reduces.
It is that table top how to be driven to realize lifting referring next to Fig. 5 to Fig. 7 rotation for introducing axis 33.
Synchronous lifting device 40 is connected to axis 33 and leg 20, is not only able to achieve axis 33 by synchronous lifting device 40
Conversion between rotation and the stretching motion of leg 20, moreover it is possible to guarantee that two legs 20 can synchronously stretch.
Referring to Fig. 5, synchronous lifting device 40 includes support frame 41, transmission chain 42, synchronous connector 43 and phase connector
44.Support frame 41 is in long strip, and the both ends of support frame 41 are respectively connected with a phase connector 44, and each phase connector 44 wraps
Include a driving wheel.The transmission chain 42 of annular, which is set on the driving wheel of two phase connectors 44, to be tensioned.Synchronous connector
43 are fixed on transmission chain 42, and rotating and reverse for transmission chain 42 will drive synchronous connector 43 between two phase connectors 44
It moves back and forth.The rotation of transmission chain 42 is synchronous, turn of the rotation drive connection ring 441 of driving wheel with the rotation of driving wheel
Dynamic, connection ring 441 can not rotatably be connect with axis 33；Therefore, the rotation of axis 33 and synchronous connector 43
Reciprocating motion checks and balance.
Referring to Fig. 6, illustrate the connection relationship of synchronous lifting device 40 Yu leg 20.Leg 20 includes the first mutually nested leg
21 and second leg 22, the first leg 21 and the second leg 22 can toward or away from one another, to realize the shortening of leg 20 or stretch
It is long.The support frame 41 of synchronous lifting device 40 is fixedly attached to the first leg 21, and synchronous connector 43 is fixedly attached to the second leg
Portion 22.Then when the relative position of the first leg 21 and the second leg 22 changes, synchronous connector 43 is on support frame 41
Position also accordingly changes, adjoint connection ring 441 rotates simultaneously.In the present embodiment, due to the first leg 21 and second
Leg 22 is nested with one another, will not be with synchronous connector in order to make the first leg 21 and the second leg 22 in relative motion
43 occur location conflicts, and the first leg 21 is the periphery for being set in the second leg 22.
Next, illustrating axis 33 is how to connect with phase connector 44 referring to Fig. 7.The crossbeam group of present embodiment
Part (including crossbeam 10 and energy conversion device 30) can easily with leg assembly (including leg 20, synchronous lifting device 40 and under
The pressure cylinder 50 that text will be further described) dismounting can be by so that lifting platform is during being shipped to client from production firm
It independently packs and transports, save logistics cost.The neatly dismounting of transverse beam assembly and leg assembly is by outer short axle 34 and bullet
What spring 341 was realized.Axis 33 (is not shown) both ends and is arranged to hollow structure in Fig. 6, outer short axle 34 can be embedded in 33 end of axis
It is interior intracavitary, and do not connect rotatably with axis 33, for example, 33 end of axis inner cavity cross section and outer short axle 34
Cross section be hexagon.Outer short axle 34 is equipped with spring 341 with 33 socket place of axis, and in its natural state, spring 341 is kept
Original is long, and outer short axle 34 is in stretching state.After outside short axle 34 applies the pressure axially towards axis 33, outer short axle 34 can be into
One step protrudes into the inner cavity of axis 33.The cross-sectional shape of the looping pit of the cross-sectional shape and phase connection ring 441 of outer short axle 34
It is adapted, outer short axle 34 is enabled to protrude into phase connection ring 441 interior just and one in outer short axle 34 or phase connection ring 441
The rotation of person rotates in which can drive another one same-phase, and the phase of the two rotation mutually restricts, i.e., both relatively unrotatablely
It is connected.
Preferably, the distance between two legs 20 of lifting platform for completing assembly (are approximately equal between two connection rings 441
Distance) be less than energy conversion device 30 under natural conditions two outer short axles 34 the distance between extension end.Then pacifying
When filling transverse beam assembly and leg assembly, by outer short axle 34 at least partially into axis 33, until two outer short axles 34 are extend into
In corresponding phase connection ring 441.Outer short axle 34 partly rebound can be stretched out axis by the effect of the elastic force of spring 341 later
33, so that transverse beam assembly and the assembly relation of leg assembly are stronger.
It should be appreciated that the assembly of outer short axle 34 and the extension type of axis 33 be not limited to be described above make outer 34 quilt of short axle
The form being nested in inside axis 33.Such as the one end of outer short axle 34 being connected with axis 33 can also be arranged to hollow knot
Structure enables axis 33 to be extended partially into the inside of outer short axle 34.
Pressure cylinder 50 (referring to Fig. 8) in present embodiment for the rising of table top provides the second auxiliary energy, and (second is auxiliary
Power-assist power).In the present embodiment, pressure cylinder 50 is pneumatic cylinder, fills high pressure nitrogen in cylinder body 51.Cylinder body 51 and support frame 41
Or first leg 21 be fixedly connected, piston rod 52 is fixedly connected with the second leg 22.In table top uphill process, piston rod 52 is held
The continuous cylinder body 51 that stretches out is to provide auxiliary power.
Preferably, in order to make power output held stationary of the piston rod 52 during stretching, the internal diameter of pressure cylinder 50 has
Special design.This is because since piston rod 52 occupies certain space inside cylinder body 51, in piston rod 52 to overhanging
During out, the gas volume inside cylinder body 51 is become larger, and the gas pressure intensity inside cylinder body 51 is gradually reduced.If piston 53
The surface area on two surfaces up and down remain unchanged, then in the outwardly directed overall process of piston rod 52, piston rod 52 is outside
Power output will constantly reduce.And in preferred embodiment introduced below, the internal diameter of cylinder body 51 is variation in the axial direction, so that living
The surface area on 53 its upper and lower two surface during the motion of plug also accordingly changes.
The construction of this preferred pressure cylinder 50 is introduced referring to Fig. 8.
The inside of cylinder body 51 is divided into first chamber C1 and second chamber C2 by piston 53 in the axial direction, first chamber C1 with
Second chamber C2 is in fluid communication.
And the difference of the internal diameter according to cylinder body 51, cylinder body 51 are divided into two regions again in the axial direction, define piston rod 52
Stretching direction be "upper", second area is located at the top of first area.The is directed toward from first area in the axial direction of cylinder body 51
On the direction in two regions, the cylinder diameter of first area is become larger, the cylinder diameter of second area remains unchanged.
Piston 53 has certain elasticity, can be in close contact with the inner wall of cylinder body 51 and be fitted according to the variation of cylinder diameter
It deforms with answering.In the motion process of the protruding cylinder body 51 of piston rod 52, when piston 53 moves the piston 53 when first area
Two surfaces up and down (surface towards first chamber C1 of piston 53 is its lower surface, piston 53 towards second chamber C2
Surface be its upper surface) difference in surface area △ S be gradually reduced；And when piston 53 movement when second area, piston 53 it is upper
The difference in surface area △ S ' on lower two surfaces is remained unchanged.Dotted portion in Fig. 8 is several places position in the motion profile of piston 53
Signal is set, table 1 is shown at above-mentioned several positions, the difference in surface area on two surfaces up and down of piston 53.It is worth noting that,
Cylinder diameter design in practical application need to be in conjunction with the case where external force suffered by piston rod 52, and considers the physics of high pressure nitrogen in cylinder
State, device self structure, gas valve setting situations such as and carry out.
Table 1
The overall process that piston rod 52 stretches out has: △ S < △ S ', the difference in surface area adaptively compensate in this process
Gas pressure intensity in cylinder body 51 is poor, so that the variation of the power output of piston rod 52 is smaller, the auxiliary power provided by pressure cylinder 50
It is relatively steady.
Below in conjunction with Fig. 1 and Fig. 2, the descending operation process of lifting platform according to the present embodiment is introduced:
(1) lifting platform rises
Original state, clutch switch 351 are in connection status, and braking fork 36 is locked by clutch 35.
Rotating handle 371 rotates forward torsional spring 31 and accumulation of energy servo-actuatedly, in conjunction with the reading of instruction device 372, makes torsional spring
31 put aside the elastic potential energy for being suitble to table top always to bear a heavy burden.
It is in an off state clutch switch 351.The locking of braking 36 disconnecting clutch 35 of fork, torsional spring 31 rotate backward
Elastic potential energy is discharged, and drives the outer short axle 34 at axis 33 and both ends to rotate via speed changer 32, the first auxiliary power is transmitted
To synchronous lifting device.
Under the support of the second auxiliary power and above-mentioned first auxiliary power that pressure cylinder 50 provides, table top is close to suspension
State.Table top can gently be mentioned at this time gives table top one upward initial momentum, and the piston rod 52 of pressure cylinder 50 stretches out.Leg 20 extends
(the first leg 21 is close evenly to rise), and the rising of the first leg 21 of two sides keeps synchronizing.
During table top rises, operator can give certain artificial outer of table top according to the motion state of table top
Power.
After table top reaches desired height, clutch switch 351 is made to be in connection status, braking fork 36 is locked by clutch 35
It is fixed.The elongation process (i.e. the uphill process of table top) of leg 20 terminates, and lifting platform height is determined, and the gravitional force of table top increases.
(2) lifting platform declines
It is in an off state clutch switch 351, the locking of braking 36 disconnecting clutch 35 of fork, axis 33 and both ends
Outer short axle 34 is in rotatable state.
Light face of presenting a theatrical performance as the last item on a programme gives table top one downward initial momentum, and table top declines under its own gravity.Under table top
During drop, axis 33 rotate forward (relative in lifting platform uphill process axis 33 and torsional spring 31 rotate backward), band
Dynamic braking fork 36 and torsional spring 31 rotate forward, 31 accumulation of energy of torsional spring.
After table top reaches desired height, clutch switch 351 is made to be in connection status, braking fork 36 is locked by clutch 35
Fixed, decline process terminates, and the height of lifting platform is determined, and the gravitional force of table top is converted to the elastic potential energy of torsional spring 31.
An advantage during the present invention has at least the following advantages:
(i) present invention provides the first auxiliary power using torsional spring 31 for the raising of lifting platform, and the auxiliary power via
Speed changer 32 and pass to axis 33 and further pass to synchronous lifting device 40.Transmitting of the speed changer 32 in power and movement
The adjustment effect that similar lever is played in journey, passes to axis 33 after the rotational angle of torsional spring 31 is amplified, so that
In the overall process that table top rises, the elastic potential energy that torsional spring 31 is put aside will not all discharge.
(ii) speed changer 32 uses the structure of Planetary Gear Transmission, and torsional spring 31 is connected to the input unit as speed changer 32
The planet carrier 321 of part, axis 33 are connected to the sun gear 322 as the output block of speed changer 32, this enables 31 sets of torsional spring
It is located at the periphery of axis 33, coaxially arranged with axis 33, and axis 33 can extend axially through speed changer 32, save cross
The space of the inner cavity of beam 10.
(iii) synchronous lifting device 40 is connected with energy conversion device 30, not only realizes rotation and the leg 20 of axis 33
Stretching motion between transmitting, and can guarantee 20 synchronization telescope of leg being arranged in pairs.
(iv) a certain distance can be relatively moved in the axial direction between outer short axle 34 and axis 33, facilitate synchronization lifting dress
Set the dismounting between 40 and energy conversion device 30.Manufacturer for storage, logistics cost etc. consideration, can by leg assembly,
The table top of transverse beam assembly and lifting platform is individually produced, is individually packed, and is then left the overall package process of lifting platform for and is disappeared
The person of expense completes.
Certainly, the present invention is not limited to the above embodiments, and those skilled in the art under the teachings of the present invention can be to this
The above embodiment of invention makes various modifications, without departing from the scope of the present invention.Such as:
(i) lifting platform according to the present invention can provide the second auxiliary power without using pressure cylinder 50, it can omit
The setting of pressure cylinder 50.When providing the second auxiliary power using pressure cylinder 50, it is equal in the axial direction that cylinder diameter also can be used
Equal common pressure cylinder.
(ii) lifting platform according to the present invention can only have (rather than two) leg 20, at this point, be connected with leg 20
Synchronous lifting device 40 plays the role of transmitting the rotation of axis 33.
(iii) speed changer 32 can also use common gear transmission structure without using the structure of Planetary Gear Transmission,
It such as is the driving form that a gear wheel is engaged with a pinion gear, the pivot center of gear wheel and pinion gear in speed changer 32
Not conllinear, in this case, torsional spring 31 is connected to the gear wheel as input part, and axis 33 is connected to as output block
Pinion gear.Although common speed changer may occupy bigger space, common speed changer than planetary transmission
, transmission ratio low to the required precision of components is arranged more flexible, easy to maintain.
(iv) transmission chain 42 is also possible to the endless drive part of the other forms such as transmission belt, fly rope.
Claims (10)
1. a kind of lifting platform comprising table top, the energy conversion device (30) being connected to below table top and leg assembly, feature exist
In,
Elastic potential energy for being converted to the auxiliary energy for promoting the table top by the energy conversion device (30) comprising is turned round
The first end of spring (31), axis (33) and speed changer (32), the torsional spring (31) is connected to the input unit of the speed changer (32)
Part, the axis (33) are connected to the output block of the speed changer (32), and the revolving speed of the input part is less than the output
The revolving speed of component,
The leg assembly is connected with the axis (33), the axis (33) forward or reverse during, the leg assembly
Shorten or extends so that the table top is down or up.
2. lifting platform according to claim 1, which is characterized in that the speed changer (32) is planetary transmission,
Including gear ring (324), sun gear (322), several planetary gears (323) and planet carrier (321)；
The gear ring (324) is fixed, and the planet carrier (321) connects the torsional spring (31) as the input part, it is described too
Sun wheel (322) connects the axis (33) as the output block；
The torsional spring (31) is set in the periphery of the axis (33), is coaxially set with the axis (33).
3. lifting platform according to claim 1, which is characterized in that the speed changer (32) includes being used as the input part
Gear wheel and pinion gear as the output block, the pivot center of the gear wheel and the pinion gear it is not conllinear.
4. lifting platform according to claim 1, which is characterized in that the lifting platform further includes the cross for being fixed on the table top
Beam (10), the energy conversion device (30) further include clutch (35), braking fork (36) and transmission component (37)；
The clutch (35) is fixed on the crossbeam (10), and the axis (33) can pass through described around own axis
Clutch (35)；
The braking fork (36) is fixed on the axis (33), and the braking fork (36) can be selectively by the clutch
(35) locking or release；When braking fork (36) is by the clutch (35) locking, the axis (33) is not able to rotate；When
When the braking fork (36) is discharged by the clutch (35), the axis (33) can be around own axis；
The transmission component (37) is connected to the second end of the torsional spring (31), can be made by operating the transmission component (37)
The second end of the torsional spring (31) rotates that the torsional spring (31) is made to put aside elastic potential energy relative to the first end.
5. lifting platform according to claim 1, which is characterized in that the leg assembly includes the first leg (21), the second leg
Portion (22) and synchronous lifting device (40), first leg (21) can along second leg (22) axially adjacent to or it is remote
From second leg (22),
The synchronous lifting device (40) includes:
Support frame (41), it is in long strip；
Two driving wheels are arranged in two ends of support frame as described above (41)；
Endless drive part is sheathed on described two driving wheels with being tensioned by described two driving wheels；With
Synchronous connector (43) is fixed on the endless drive part；Wherein,
The axis (33) connects the endless drive part, and support frame as described above (41) is fixedly attached to first leg (21),
The synchronous connector (43) is fixedly attached to the second leg (22).
6. lifting platform according to claim 5, which is characterized in that first leg (21) is set in second leg
(22) periphery.
7. lifting platform according to claim 1, which is characterized in that the energy conversion device (30) further includes outer short axle
(34), the outer short axle (34) can be along mutual axially and movably nested with the axis (33) in the end of the axis (33)
Setting.
8. lifting platform according to claim 7, which is characterized in that in the company of the outer short axle (34) and the axis (33)
It meets place and is equipped with spring (341), outer short axle (34) can be made close to the axis (33) by squeezing the spring (341).
9. lifting platform according to claim 5, which is characterized in that the leg assembly further includes pressure cylinder (50), the pressure
The cylinder body (51) of power cylinder (50) is fixedly connected with support frame as described above (41), the piston rod (52) of the pressure cylinder (50) and described the
Two legs (22) are fixedly connected.
10. lifting platform according to claim 9, which is characterized in that the piston (53) of the pressure cylinder (50) is by the cylinder
Body (51) is separated into first chamber (C1) and second chamber (C2), the first chamber (C1) and the second chamber (C2) fluid
Connection, the piston rod (52) stretch out the cylinder body (51) from the second chamber (C2),
The cylinder body (51) is divided into first area and second area in the axial direction, and the second area is more leaned on than the first area
The extension end of the nearly piston rod (52),
In the first area, the internal diameter of the cylinder body (51) is from the first chamber (C1) to the second chamber (C2)
It is become larger on direction, in the second area, the internal diameter of the cylinder body (51) is from the first chamber to second chamber
It is kept constant on the direction of room.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910266765.2A CN109869455B (en) | 2019-04-03 | 2019-04-03 | Lifting table |
| PCT/CN2019/094847 WO2020199409A1 (en) | 2019-04-03 | 2019-07-05 | Lifting platform |
| KR1020207019143A KR102386620B1 (en) | 2019-04-03 | 2019-07-05 | lift |
| JP2020534921A JP7034510B2 (en) | 2019-04-03 | 2019-07-05 | Lifting platform |
| TW109110444A TWI730696B (en) | 2019-04-03 | 2020-03-27 | Lifts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910266765.2A CN109869455B (en) | 2019-04-03 | 2019-04-03 | Lifting table |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109869455A true CN109869455A (en) | 2019-06-11 |
| CN109869455B CN109869455B (en) | 2024-04-16 |
Family
ID=66922046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910266765.2A Active CN109869455B (en) | 2019-04-03 | 2019-04-03 | Lifting table |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP7034510B2 (en) |
| KR (1) | KR102386620B1 (en) |
| CN (1) | CN109869455B (en) |
| TW (1) | TWI730696B (en) |
| WO (1) | WO2020199409A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020199409A1 (en) * | 2019-04-03 | 2020-10-08 | 广州市晋新家具有限公司 | Lifting platform |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115467521B (en) * | 2022-10-08 | 2023-07-18 | 广西博强建筑科技有限公司 | Building aluminum template mounting height adjusting support |
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| CN109869455B (en) * | 2019-04-03 | 2024-04-16 | 广州市晋新家具有限公司 | Lifting table |
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- 2019-04-03 CN CN201910266765.2A patent/CN109869455B/en active Active
- 2019-07-05 WO PCT/CN2019/094847 patent/WO2020199409A1/en active Application Filing
- 2019-07-05 KR KR1020207019143A patent/KR102386620B1/en active IP Right Grant
- 2019-07-05 JP JP2020534921A patent/JP7034510B2/en active Active
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2020
- 2020-03-27 TW TW109110444A patent/TWI730696B/en active
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| JPS5910631U (en) * | 1982-07-14 | 1984-01-23 | トヨセツト株式会社 | Electric desk lifting device |
| DE202004020323U1 (en) * | 2004-11-26 | 2005-04-07 | Patulum Consultadoria E Market | Lifting and lowering mechanism for table or chair, comprising transmission gear for quick action |
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Also Published As
| Publication number | Publication date |
|---|---|
| TW202037826A (en) | 2020-10-16 |
| CN109869455B (en) | 2024-04-16 |
| KR20200117990A (en) | 2020-10-14 |
| WO2020199409A1 (en) | 2020-10-08 |
| JP7034510B2 (en) | 2022-03-14 |
| KR102386620B1 (en) | 2022-04-14 |
| TWI730696B (en) | 2021-06-11 |
| JP2021520237A (en) | 2021-08-19 |
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