CN107512686A - Lever used for physics lifting and lowering method - Google Patents
Lever used for physics lifting and lowering method Download PDFInfo
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- CN107512686A CN107512686A CN201710956525.6A CN201710956525A CN107512686A CN 107512686 A CN107512686 A CN 107512686A CN 201710956525 A CN201710956525 A CN 201710956525A CN 107512686 A CN107512686 A CN 107512686A
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- lever
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
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Abstract
The use of lever, ubiquitous in daily life, the method used is extremely wide.Traditional lever lowering or hoisting gear, has that equipment cost is low, application method is simple, conveniently, but exists, equipment not system, the defects of being low, effect is not high safe to use.At present, in the lever jacking equipment of market circulation, generally have, it is safe to use, efficient, laborsaving the advantages that.But often the precondition such as special corollary equipment, specific power source is relied on to play its function.The present invention, the cost of inheriting tradition lever jacking equipment is low, application method is simple the advantages that, with reference to existing market circulation lever jacking equipment device it is safe efficient, laborsaving the characteristics of.With lever principle, by setting extendable lever support, pulley lifting lever, folding lever lifting support device, a kind of method of object is lifted using lever.With simple structure, the features such as safe to use, efficient, laborsaving, long lifespan.
Description
Technical field：
The present invention relates to physics, particularly lever, by setting extendable lever support, pulley lifting lever, folding lever
The devices such as lifting support, a kind of method of object is lifted using lever.
Background technology：
Archimedes once said：" giving my foothold and a sufficiently long lever, I prizes the earth at can ".Lever
Utilization it is extremely wide, ubiquitous in daily life, the elevating method of lever is numerous.Traditional lever lowering or hoisting gear, tool
Have that equipment cost is low, application method is simple, conveniently, but exist, equipment not system, the defects of being low, effect is not high safe to use.
At present, in the lever jacking equipment of market circulation, generally have, it is safe to use, efficient, laborsaving the advantages that.But often to rely on
The precondition such as special corollary equipment, specific power source can play its function.
The present invention, the cost of inheriting tradition lever jacking equipment is low, application method is simple the advantages that, with reference to existing market
Circulate lever jacking equipment it is safe efficient, laborsaving the characteristics of.With lever used for physics principle, by set extendable lever support,
The devices such as pulley lifting lever, folding lever lifting support, a kind of method of object is lifted using lever.With simple structure,
The features such as safe to use, efficient, laborsaving, long lifespan.
The content of the invention：
The present invention relates to physics, particularly lever, by setting extendable lever support, pulley lifting lever, folding lever
Lifting support device, a kind of method of object is lifted using lever.
Have the characteristics that：1st, simple structure；2nd, safety coefficient is high by 3, application method is simple 4, plant maintenance is convenient；5th, into
This is low；6th, the features such as service life is long.
According to the features of the present invention and operation principle, with extendable lever support, pulley lifting lever, folding lever lifting branch
Exemplified by rack device, operation principle with regard to the specific embodiment of lever lifting and lowering method, construct, install and use, maintaining etc. and be described as follows：
Embodiment：
[1]：Extendable lever support：
First, operation principle
With lever principle, set：1st, lever mount support.2nd, using base bearing as fulcrum, set on fulcrum and bearing
Lever arm of force set of the base support into an angle of 90 degrees.3rd, both sides are covered in the bearing base arm of force, if the elevating safety parallel with the arm of force is determined
Position thick stick set.4th, retractable lever is made；Elevating safety positions thick stick.It is combined into using lever bearing base support as support, in support
Upper installation extendable lever, the extendable lever support of secure localization thick stick.
Extendable lever work when, by lever bearing base support place lifting object before, according to lifting needs, adjust with
Lift the distance between thing.Extendable lever and elevating safety positioning thick stick are packed into set.The force arm of force is used by extendable lever,
After levering up object, the bottom of object is levered up with elevating safety positioning thick stick insertion, makes lever mount, elevating safety positioning thick stick, insertion
Object bottom is divided into gusseted, and after levering up object formation secure localization, simultaneously, stretch the downward adjustment position of lever arm of force thick stick
Bar protracts towards object direction, and extendable lever continues to lever up object, readjusts the object that elevating safety positioning thick stick insertion levers up
The position of bottom, after levering up object formation secure localization, repeat to do work.
2nd, construct
It is made up of lever mount support, extendable lever, elevating safety positioning thick stick.
(1) lever mount support
It is made up of base support, lever arm of force set, elevating safety positioning thick stick set.
(1), base support
According to the adjustable height for setting lever and the composite factors such as weight are lifted, determine height, the length of fixing support for base
Degree, width and by weight degree after.It is selected：One piece of bottom plate, two base support feets, a solid shafting.Two bases are supported
Pin, it is welded on bottom plate, the support foot rest vertical with bottom plate, solid shafting is welded (before welding, by 1 lever arm of force set and 2
Individual elevating safety positioning thick stick set bearing, is enclosed on axle) on foot stool, with bedplate into parallel base support.
(2), lever arm of force set
Based on the material of base support, yardstick, welded into an angle of 90 degrees with iron pipe and bearing outside, after welding, be enclosed on
On the centre bearing of base support solid shafting, turn into lever arm of force set.
(3), elevating safety positioning thick stick set
Based on the material of base support, yardstick, it is welded into iron pipe and bearing outside into an angle of 90 degrees outside two bearings
Set, after welding, it is enclosed on the bearing of the both sides of lever arm of force set, turns into elevating safety positioning thick stick set.
2nd, act on
(1), base support
For balance pivot；Lever arm of force set is installed；Elevating safety positions thick stick set；For support safety anchor point.
(2), lever arm of force set
The extendable lever arm of force is installed.
(3), elevating safety positioning thick stick set
Elevating safety positioning thick stick is installed.
(2), extendable lever
It is made up of main force's arm bar, secondary arm lever
(1), main force's arm bar
According to the adjustable height and lifting weight for setting lever, and on the basis of lever arm of force set size.Setting can be inserted in
The iron pipe arm of force of lever arm of force set, turns into main force's arm bar.
(2), secondary arm lever
On the basis of the adjustable height and lifting weight, and lever main force arm that lever is set.Setting can be inserted in lever
The iron pipe arm of force of main force's arm, on main force's arm, stretched out when main force's arm moves downward, turn into secondary arm lever.
2nd, act on
(1), main force's arm bar
Secondary arm lever is installed；When lever does work, combined with the secondary arm of force, turn into resistance and firmly arm strength.
(2), secondary arm lever
When lever does work, combined with main force arm, turn into lever resistance and firmly arm strength.
(3), elevating safety positioning thick stick
1st, construct
On the basis of the radius of clean-up of lever arm of force, elevating safety positioning thick stick set.Setting can be inserted in elevating safety positioning
The iron pipe arm of force of thick stick set, turn into elevating safety positioning thick stick.
2nd, act on
When lever does work, the bottom of object is inserted, is divided into three with lever mount, elevating safety positioning thick stick insertion object bottom
Angle supports, to levering up object secure localization.
3rd, install, use：
(1), install
1st, by lever arm of force set, it is mounted on the center of lever mount support shaft；Elevating safety is positioned thick stick
Set, the lever arm of force set both sides on lever mount support solid shafting.
2nd, extendable lever is put installed in lever arm of force, elevating safety positioning thick stick is arranged on elevating safety positioning thick stick set
On.
(2), use
Before extendable lever base support is placed into lifting object, according to lifting needs, adjust and lift between thing away from
From.With manpower, object is levered up using lever arm of force, elevating safety positioning thick stick insertion is levered up the bottom of object into secure localization.
After the downward adjustment position in extendable lever arm of force one end, continue to lever up object, the position safety of adjustment elevating safety positioning thick stick insertion
After positioning, repeat to do work.
4th, care and maintenance：
Before use, should check：Whether support consolidates；Whether the flexible function of secondary thick stick is normal；Whether all bearings are clever
It is living.Fortune should be kept to slide to bearing, cleaning.Before use, being important to determine the set, bearing and safety of elevating safety positioning thick stick
Whether position thick stick is normally carried out checking.
[2] pulley lifting lever：
First, operation principle
With lever principle, set：1st, lever fixed support.2nd, on fixed support, if pulley lifting bearing lever bottom
Seat and hang thing bearing lever base, 3, pulley lifting bearing lever mount on, install pulley lever arm of force.With the arm of force most
End, install pulley.On pulley, installation tightrope lifting article hanger, into pulley lever.4th, thing bearing lever base is hung
On, thing lever arm of force is hung in installation.Set in resistance arm end and hang thing pallet, it is and soft on pulley when the resistance arm is raised to highest
Rope is hung thing hook ring and connected, and into thing lever is hung, is combined into pulley lifting lever.
When pulley lifting lever works, lifting object is adjusted to the preceding appropriate location of lever dolly.Thick stick is lifted by hanging thing
The extension thing pallet of bar, stone roller will be hung and be increased on pulley tightrope extension thing hook ring, the extension stone roller on pulley other end tightrope rises, and causes to slide
Take turns lifting lever and produce pressure, moved downward with the arm of force, the object on resistance arm is increased, to after predetermined position, unload downslide
Take turns the extension that tightrope is hung on thing hook ring to cut or polish jade with an emery wheel, lever resets, and continues to repeat to do work.
2nd, construct
It is made up of lever fixed support, pulley lever, extension thing lever.
(1), lever fixed support
1st, composition construction
It is made up of lever mount support, pulley lever mount, extension thing lever mount.
(1), lever mount support
According to the adjustable height for setting lever and the composite factors such as weight are lifted, determine height, the length of fixing support for base
Degree, width and by weight degree after.Setting：A, it is welded into iron plate, the platform support of square.B, in platform support first
The centre on side, if pulley lever mount support fixed bit.C, in the right angle electrical on platform support second Yu Article 3 side, if hanging thing
Lever mount support fixed bit, turns into lever dolly platform.
(2), pulley lever mount
On the basis of the material of lever mount support, yardstick, and the adjustable height of setting lever and lifting weight.In thick stick
On pulley lever mount support fixed bit on bar base support, bearing base is installed, turns into pulley lever mount.
(3) thing lever mount, is hung
On the basis of the material of lever mount support, yardstick, and the adjustable height of setting lever and lifting weight.In thick stick
On extension thing lever mount support fixed bit on bar base support, bearing base is installed, turns into and hangs thing lever mount.
2nd, act on
(1), lever mount support
For pulley lifting lever integral support；Pulley lever mount is installed；Thing lever mount is hung in installation.
(2), pulley lever mount
Pulley lever arm of force is installed.
(3), secure localization thick stick set
Thing lever arm of force is hung in installation.
(2), pulley lever
1st, composition construction
It is made up of pulley lever arm of force, extension thing pulley tightrope device.
(1), pulley lever arm of force
On the basis of the composite factors such as the adjustable height and lifting weight that lever is set.By the use of iron pipe as lever arm of force,
In the firmly arm of force least significant end of lever arm of force, pulley is installed, turns into pulley lever arm of force.
(2) thing pulley tightrope device, is hung
According to the adjustable height and the lifting composite factor such as weight for setting lever, determine tightrope length, by weight degree with
And on the basis of the pulley on lever arm of force.Set：A, from a tightrope.B, on tightrope, if the spacing hook ring of rule.c、
Thing tightrope will be hung to be enclosed on lever arm of force pulley.D, by the tightrope left side, it is set to tightrope and hangs thing lever pallet reinforcing hook ring；The right is set
Thing lever stress hook ring is hung for tightrope, turns into and hangs thing pulley tightrope device.
2nd, act on
(1), pulley lever arm of force
When pulley lever does work, turn into resistance and firmly arm strength；The connection suspension thing tightrope device on pulley.
(2) thing pulley tightrope device, is hung
Stone roller is hung in carrying.
(3) thing lever, is hung
1st, composition construction
It is made up of extension thing lever arm of force, extension stone roller.
(1) thing lever arm of force, is hung
On the basis of the composite factor such as the adjustable height of pulley lever and lifting weight.It is lever arm of force with iron pipe,
Thing pallet is hung in the resistance arm least significant end of lever, installing, is turned into and is hung thing lever arm of force.
(2) stone roller, is hung
Used according to the composite factor such as the adjustable height of pulley lever and lifting weight, and tightrope heavy burden dynamics to need
Metal is fabricated to the iron that specification is different, has link and cut or polish jade with an emery wheel, and turns into extension stone roller.
2nd, act on
(1) thing lever arm of force, is hung
Thing pallet is hung in installation；Extension stone roller on pallet is raised into tightrope to hang on thing reinforcing hook ring.
(2) stone roller, is hung
Hang over tightrope to hang on thing lever stress hook ring and tightrope extension thing reinforcing hook ring, lever is produced pressure acting.
3rd, install and use
(1), install
1st, pulley bearings lever mount is arranged on, the pulley lever mount support fixed position on lever fixed support
On.
2nd, thing lever mount will be hung to be arranged on, on the extension thing lever mount support fixed position on lever fixed support.
3rd, by pulley lever arm of force, extension thing lever arm of force, it is separately mounted on lever arm of force base.
4th, in pulley lever with installing pulley on the arm of force.Tightrope is installed on pulley.
5th, thing pallet is hung in installation on thing lever is hung.
(2), use
When pulley lifting lever works, lifting object is adjusted to the preceding appropriate location of lever dolly.According to lifting object
Weight, adjustable height, choose the extension stone roller of the right and left.With manpower, the extension stone roller hung on thing tightrope hook ring is increased on pulley
Tightrope hang on thing reinforcing hook ring, extension on the right of pulley is cut or polish jade with an emery wheel by Action of Gravity Field, is moved upwards under the drive of tightrope.Cause pulley
Lifting lever produces pressure, the object on resistance arm is risen to predetermined position.Unload the reinforcing on lower sheave tightrope and hang stone roller, it is right
Side hangs stone roller and moved downward, and pressure releases, resets lever, continues to repeat to do work.
4th, care and maintenance
Before use, should check：Whether support is firm, safety；Whether whole bearings are flexible；Whether just to hang stone roller link
Often；Every time before use, safety whether complete to tightrope, should be checked；Fortune should be kept to slide to bearing, cleaning.
[3] folding lever lifting support：
First, operation principle
With lever principle, set：1st, lever fixed support.2nd, in the lever mount on fixed support, if lever bottom
Seat, the arm of force.3rd, the top in the first lever with arm of force end, installing and lever arm of force pulley at a right angle.4th, in the second lever
On the arm of force, the pulley track at a right angle with the first arm of force pulley joining is set to；In the second arm arm of force end, and if lever
Arm of force pulley at a right angle.5th, on the 3rd lever arm of force, it is set to the pulley track at a right angle with the second arm of force pulley joining.
6th, in the 3rd lever arm of force end, set and hang thing pulley tightrope device.7th, thing lever is hung.8th, stone roller is hung in setting.Composition is with lever
Support is the folding lever lifting support of support.
When folding lever lifting support works, lifting object is adjusted to before the first lever resistance point of lever dolly suitably
Position.The reinforcing cut or polish jade with an emery wheel is hung with the thing pulley tightrope of hanging set on force to the 3rd arm of force by hanging thing lever.3rd arm of force stress
Afterwards, when moving downward, the acting of second arm of force is driven.After second arm of force stress, when moving downward, drive first arm of force to rise, make
Object up-down is to predetermined position.After resetting folding lever by hanging thing lever, repeat to do work.
2nd, construct
It is made up of folding lever fixed support, extension thing pulley tightrope device, extension thing lever arm of force.
(1), folding lever fixed support
1st, form
By lever dolly platform, the first lever dolly, the second lever dolly, the 3rd lever dolly, extension thing lever dolly group
Into.
(1), lever dolly platform
According to the composite factors such as the adjustable height and lifting weight for setting lever, height, the length of decision lever dolly platform
Degree, width and by weight degree after.Setting, the platform support of square.On the position of a line 1/3rd, if first
Lever dolly fixed bit, for installing lever bearing carrier base；On 1/3rd position on Article 4 side, if the second lever branch
Frame fixed bit, for installing lever bearing carrier base；In Article 2 on the position at the upper right angle with during Article 3, if the 3rd lever
Support fixed bit, for installing the 3rd lever bearing carrier base.In the square position on a line with two articles of sides, if hanging thing lever
Support fixed bit, thing lever bearing carrier base is hung for installation.As lever dolly platform.
(2), the first lever dolly
According to composite factors such as the adjustable heights and lifting weight for setting lever, in the first thick stick of platform support a line
On bar support fixed position, lever bearing carrier base is installed；Lever arm of force is installed on carrier base；At lever force arm of force end
End, set and arm of force pulley at a right angle.As the first lever dolly.
(3), the second lever dolly
According to composite factors such as the adjustable heights and lifting weight for setting lever, based on the first lever dolly.Flat
On the second lever dolly of platform support fixed position, lever bearing carrier base is installed；Lever arm of force is installed on carrier base；By lever
Arm of force lower end, it is set to the pulley guide rails to be matched with the pulley gear of the first lever arm of force；In lever arm of force end, set with
Arm of force pulley at a right angle.As the second lever dolly.
(3), the 3rd lever dolly
According to composite factors such as the adjustable heights and lifting weight for setting lever, based on first, second lever dolly.
On the 3rd lever dolly fixed position on platform support Article 2 side, lever bearing carrier base is installed；Installed on carrier base
Lever arm of force；By lever arm of force lower end, the pulley guide rails to be matched with the pulley gear of the second lever arm of force are set to；Used in lever
Arm of force end, set and hang thing pulley tightrope device.As the 3rd lever dolly.
(4) thing lever dolly, is hung
According to the adjustable height and lifting weight for setting lever, hang the composite factors such as thing pulley tightrope heavy burden.In lever branch
On the extension thing lever dolly fixed position of body panel, thing lever bearing carrier base is hung in installation.Thing lever is hung in installation on carrier base
The arm of force.As extension thing lever dolly.
2nd, act on
(1), lever dolly platform
Frame is overally supported for folding lever；Installation first, second, third, hang thing lever dolly base.
(2), the first lever dolly
First lever arm of force is installed；Lift object；The second lever is connected with pulley.
(3), the second lever dolly
Second lever arm of force is installed；The second lever is accepted with track pulley.
(4), the 3rd lever dolly
3rd lever arm of force is installed；The second lever is accepted with track pulley；Accept and hang thing pulley tightrope device.
(5) thing lever dolly, is hung
The thing lever dolly arm of force is hung in installation；Thing pallet is hung in installation；Extension stone roller on pallet is raised to tightrope and hangs thing reinforcing hook ring
On.
(2) thing pulley tightrope device, is hung
1st, construct
According to the adjustable height and the lifting composite factor such as weight for setting lever, determine tightrope length, by weight degree with
And on the basis of the pulley on lever arm of force.Set：A, from a tightrope.B, on tightrope, if the spacing of rule hangs thing ring.c、
Thing tightrope will be hung to be enclosed on the 3rd lever pulley.D, by the tightrope left side, it is set to tightrope and hangs thing lever pallet reinforcing link；The right is set
Thing lever stress link is hung for tightrope, turns into and hangs thing pulley tightrope device.
2nd, act on
Stone roller is hung in carrying.
(3) thing lever arm of force, is hung
1st, composition construction
It is made up of the extension thing lever pallet arm of force, extension stone roller.
(1) the thing lever pallet arm of force, is hung
On the basis of the composite factor such as the adjustable height of pulley lever and lifting weight.It is lever arm of force with iron pipe,
Thing pallet is hung in the resistance arm least significant end of lever, installing, is turned into and is hung the thing lever pallet arm of force.
(2) stone roller, is hung
Used according to the composite factor such as the adjustable height of pulley lever and lifting weight, and tightrope heavy burden dynamics to need
Metal is fabricated to the iron that specification is different, has link and cut or polish jade with an emery wheel, and turns into extension stone roller.
2nd, act on
(1) the thing lever pallet arm of force, is hung
Thing pallet is hung in installation；Extension stone roller on pallet is raised into tightrope to hang on thing reinforcing hook ring.
(2) stone roller, is hung
Hung by hanging over tightrope on thing lever stress hook ring and tightrope extension thing reinforcing hook ring, lever is produced pressure acting.
3rd, install and use
(1), install
1st, on the first lever dolly fixed bit of platform support a line, the first lever is installed.2nd, in platform support
On the second lever dolly fixed bit on Article 4 side, the second lever is installed.3rd, in the 3rd lever branch of platform support a line
On frame fixed bit, the 3rd lever is installed.4th, on the extension thing lever dolly position on platform support Article 3 side, thing thick stick is hung in installation
Bar.5th, on the 3rd lever tail end, heavy burden tightrope is installed.6th, thing pallet is hung in installation on thing lever dolly is hung.
(2), use
When folding lever lifting support works, lifting object is adjusted to before the first lever resistance point of lever dolly suitably
Position.With manpower, the 3rd arm of force is hung into stone roller rise with the tightrope suspension set on force, the 3rd arm of force is reinforced, drives second
The arm of force does work.After second arm of force stress, when moving downward, the resistance point of first arm of force is set to lift object to predetermined position.It is logical
Cross extension thing lever and hang stone roller to hanging thing pulley tightrope, after resetting folding lever, repeat to do work.
4th, maintaining
Before use, should check：Whether support consolidates；Whether each lever dolly is normal, whether bearing is flexible.It is right
Bearing should keep fortune to slide, cleaning.Before per task, tightrope, extension stone roller link should be checked.
Claims (9)
1. lever used for physics lifting and lowering method includes, with lever principle, physics lever lowering or hoisting gear is set.Characterized in that, by setting
The characteristics of determining extendable lever, pulley lifting lever, folding lever lowering or hoisting gear lifting object.
2. according to right 1, by setting lever fixed support, it is fixed that balance pivot, lever set, elevating safety are set on support
Position thick stick set, lever arm of force.Characterized in that, the characteristics of being set to multi-functional lever dolly platform.
3. according to the extendable lever described in right 1, during object up-down, thick stick is positioned using elevating safety.Characterized in that,
The characteristics of with the support of safety and firmness is formed between elevating safety positioning supporting point, lifting object gravity.
4. according to right 1, by setting extendable lever device, object is lifted using lever.Characterized in that, setting is flexible
Leverage, when lever moves downward, by Action of Gravity Field, the characteristics of forward extending out automatically.
5. according to right 1, pulley tightrope lifting article hanger is installed on lever.Characterized in that, by being hung on tightrope
Thing, the characteristics of as lever lifting drive.
6. according to right 5, article hanger is lifted by installing pulley tightrope on lever, resets folding lever.Its feature
It is, by hanging thing on tightrope, as lever lifting drive, the characteristics of resetting lever.
7. installing pulley tightrope lifting article hanger according to right 5, on lever, suspension, which is hung, on tightrope cuts or polish jade with an emery wheel.Its feature exists
In by tightrope device, the characteristics of by the height reduction in lever force.
8. installing pulley tightrope lifting article hanger according to right 5, on lever, setting, which is hung, on tightrope cuts or polish jade with an emery wheel, as lever
The power of lifting.Characterized in that, by well-regulated dispersion, gather the characteristics of using.
9. according to right 1, by folding lever lifting support, a plurality of lever arm of force lifting object is set.Characterized in that,
The characteristics of by a plurality of lever arm of force Distance Shortened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710956525.6A CN107512686A (en) | 2017-10-06 | 2017-10-06 | Lever used for physics lifting and lowering method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710956525.6A CN107512686A (en) | 2017-10-06 | 2017-10-06 | Lever used for physics lifting and lowering method |
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| Publication Number | Publication Date |
|---|---|
| CN107512686A true CN107512686A (en) | 2017-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710956525.6A Pending CN107512686A (en) | 2017-10-06 | 2017-10-06 | Lever used for physics lifting and lowering method |
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| CN203185299U (en) * | 2013-03-05 | 2013-09-11 | 刘勇 | Composite lever-type electric hammer lifting auxiliary support |
| CN203612880U (en) * | 2013-11-17 | 2014-05-28 | 光宝电子(广州)有限公司 | Lifting device |
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2017
- 2017-10-06 CN CN201710956525.6A patent/CN107512686A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1827517A (en) * | 2005-12-23 | 2006-09-06 | 徐西饶 | Method for hoisting heavy goods by lever principle |
| JP2008030950A (en) * | 2006-07-27 | 2008-02-14 | Man Diesel Sa | Lift device |
| CN201873477U (en) * | 2010-12-04 | 2011-06-22 | 薛红梅 | Manual manhole cover lifting device |
| CN202245963U (en) * | 2011-09-17 | 2012-05-30 | 河南利源煤焦集团有限公司 | Device for opening water seal cover |
| CN203185299U (en) * | 2013-03-05 | 2013-09-11 | 刘勇 | Composite lever-type electric hammer lifting auxiliary support |
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Application publication date: 20171226 |
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| WD01 | Invention patent application deemed withdrawn after publication |