CN104944318A - Shears-fork type lifting mechanism - Google Patents
Shears-fork type lifting mechanism Download PDFInfo
- Publication number
- CN104944318A CN104944318A CN201510237842.3A CN201510237842A CN104944318A CN 104944318 A CN104944318 A CN 104944318A CN 201510237842 A CN201510237842 A CN 201510237842A CN 104944318 A CN104944318 A CN 104944318A
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- CN
- China
- Prior art keywords
- cylinder
- lifting
- lifting mechanism
- base
- scissor
- 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.)
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Classifications
-
- 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
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
- B66F7/08—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement hydraulically or pneumatically operated
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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
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/10—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks
- B66F7/16—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by one or more hydraulic or pneumatic jacks
- B66F7/18—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by one or more hydraulic or pneumatic jacks by a single central jack
-
- 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
- B66F2700/00—Lifting apparatus
- B66F2700/09—Other lifting devices
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
Disclosed is a shears-fork type lifting mechanism which comprises an upper platform, a base, two outer support arms, two inner support arms, a cylinder and a lifting air bag. The shears-fork type lifting mechanism has the advantages that the lifting air bag plays a leading role in the initial stage of lifting, so that pressure borne by the cylinder in the initial stage of lifting is lowered greatly as compared with that of the existing limiting mechanism, and maximum lifting weight of the lifting mechanism can be further increased within the standard range of safety pressure; besides, since the lifting air bag is compressible and is tiny in occupied space, the lowest initial altitude of the lifting mechanism can reach the lowest altitude allowed by the geometric structure, and the application range of the lifting mechanism is widened; in addition, when the lifting mechanism is lowered into the maximum stroke range of the air bag, due to the presence of the lifting air bag, cushioning effect can be achieved, and vibration can be reduced greatly.
Description
Technical field
The invention belongs to the machinery manufacturing technology field that hoists, particularly relate to a kind of scissor-type lifting mechanism.
Background technology
The application of scissor-type lifting mechanism widely, as the key building block of jacking equipment, is equipped on the airport special equipments such as food conveyor, platform truck, mobile connecting bridge, portable control tower, portable shelter bridge at present in a large number.
Because some scissor-type lifting mechanisms usually require that the starting altitude of its workplatform is lower, as the airport such as platform truck, mobile connecting bridge special equipment.
But, there is following point in above-mentioned traditional scissor-type lifting mechanism: when it is in lifting starting point, because the angle between lifting support arm bottom and ground is very little, so hydraulic efficiency pressure system will to make in scissor-type lifting mechanism support arm bottom upwards promote thus reach certain angle with level ground to produce very large application force, so the pressure that bears of hydraulic actuating cylinder is also very large.In addition, at lifting initial period, the angle of support arm and level ground is less, and the pressure suffered by hydraulic efficiency pressure system is larger, even can exceed safe design standard out and away.
Summary of the invention
In order to solve the problem, the object of the present invention is to provide a kind of scissor-type lifting mechanism reducing lifting initial period lift-off pressures.
In order to achieve the above object, scissor-type lifting mechanism provided by the invention comprises upper mounting plate, base, two outer support arms, two interior support arms, cylinder and Lifting air sacs; Wherein upper mounting plate and base be arranged in parallel up and down; The middle part of an outer support arm and an interior support arm is hinged and form one group, outer support arm often in group and the left end of interior support arm utilize pinned connection front end or rear end on the left of the surface of base and the bottom surface of upper mounting plate respectively, right-hand member is separately installed with a roller, and roller can slide on the surface of the bottom surface of upper mounting plate or base; Cylinder lies in the middle part of susceptor surface, and the left end surface middle part of one end and base is hinged, and the other end is connected by the bottom of pipe link with two interior support arms, and its upper cylinder body is connected with compressed air system by pipeline simultaneously; The lower end of Lifting air sac is arranged in the middle part of susceptor surface, and is provided with gas-charging connection bottom it, and this gas-charging connection is connected with the pipeline of cylinder by pipeline.
Described Lifting air sac is cylindrical structure, when charge condition, it is integrally made up of upper cylinder and lower cylinder, and the diameter of upper cylinder is greater than the diameter of lower cylinder, in the middle part of the bottom of simultaneously lower cylinder, be upwards recessed to form one for holding the strip shape groove of cylinder.
The range of described Lifting air sac is less than the forced stroke of cylinder.
Scissor-type lifting mechanism provided by the invention has following beneficial effect: play a leading role at the initial period Lifting air sac of lifting, therefore the more existing lifting mechanism of the present invention's pressure that cylinder bears in lifting initial period reduces greatly, so the maximum lifting weight of lifting mechanism can be promoted in the standard range of safe pressure further, and due to the compressibility of Lifting air sac, it takes up space minimum, the minimum altitude that the minimum starting altitude of lifting mechanism therefore can be made to reach geometry allow, thus expand the field of application of lifting mechanism, in addition, time in the maximum travel limit that lifting mechanism drops to air bag, due to the existence of Lifting air sac, buffer action can be played, vibration can be greatly reduced.
Accompanying drawing explanation
Fig. 1 is the initial position structural representation of scissor-type lifting mechanism provided by the invention.
Fig. 2 is the structural representation that the Lifting air sac of scissor-type lifting mechanism provided by the invention is started working.
Fig. 3 is the structural representation of the firm power cut-off of Lifting air sac of scissor-type lifting mechanism provided by the invention.
Fig. 4 is any time structural representation of scissor-type lifting mechanism provided by the invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, scissor-type lifting mechanism provided by the invention is described in detail.
As shown in Fig. 1-Fig. 4, scissor-type lifting mechanism provided by the invention comprises upper mounting plate 1, the outer support arm of base 6, two 3, two interior support arms 2, cylinder 5 and Lifting air sacs 4; Wherein upper mounting plate 1 and base about 6 be arranged in parallel; The middle part of an outer support arm 3 and an interior support arm 2 is hinged and form one group, outer support arm 3 often in group and the left end of interior support arm 2 utilize pinned connection front end or rear end on the left of the bottom surface of the surface of base 6 and upper mounting plate 1 respectively, right-hand member is separately installed with a roller, and roller can slide on the surface of the bottom surface of upper mounting plate 1 or base 6; Cylinder 5 lies in base 6 surface middle part, and the left end surface middle part of one end and base 6 is hinged, and the other end is connected by the bottom of pipe link with two interior support arms 2, and its upper cylinder body is connected with compressed air system by pipeline simultaneously; The lower end of Lifting air sac 4 is arranged on base 6 surface middle part, and is provided with gas-charging connection bottom it, and this gas-charging connection is connected by the pipeline of pipeline with cylinder 5.
Described Lifting air sac 4 is cylindrical structure, when charge condition, it is integrally made up of upper cylinder and lower cylinder, and the diameter of upper cylinder is greater than the diameter of lower cylinder, in the middle part of the bottom of simultaneously lower cylinder, be upwards recessed to form one for holding the strip shape groove of cylinder 5.In addition, the lower surface of Lifting air sac 4 should be made as far as possible to be full of the surface middle part of base 6, the hoisting force of Lifting air sac 4 can be reduced like this.
The range of described Lifting air sac 4 is less than the forced stroke of cylinder 5.
Now scissor-type lifting mechanism principle of work provided by the invention is described below: when not using scissor-type lifting mechanism provided by the invention, air pressure is not had in Lifting air sac 4, because this air bag is compressible, institute takes up space minimum, and therefore this lifting mechanism can be reduced to the extreme lower position that geometric condition allows.At the initial period of work, pressurized air from compressed air system will be supplied to Lifting air sac 4 and cylinder 5 by pipeline, thus the air pressure in Lifting air sac 4 is increased, promote upper mounting plate 1 thus to move straight up, cylinder 5 inwardly pulls the bottom of two interior support arms 2 simultaneously, vertical component required for lifting is shared by Lifting air sac 4, and the air pressure thus suffered by cylinder 5 is relatively little.Along with the further lifting of Lifting air sac 4, angle between outer support arm 3 and base 6 increases gradually, when highly reaching the range of Lifting air sac 4, Lifting air sac 4 and upper mounting plate 1 disengage, now the application force of Lifting air sac 4 pairs of upper mounting plates 1 disappears, the complete motive force by cylinder 5 makes whole lifting mechanism continue upward movement, until reach required lift height afterwards.At this moment owing to there is a larger angle between outer support arm 3 and base 6, therefore cylinder 5 does not just need too large pressure.
And when making the upper mounting plate 1 of this lifting mechanism decline under the impetus of cylinder 5, when in the maximum travel limit highly dropping to Lifting air sac 4, the top of Lifting air sac 4 contacts with the bottom surface of upper mounting plate 1 again, thus can play the effect of buffer shock-absorbing.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description, these distortion and improvement are also considered as protection scope of the present invention.
Claims (3)
1. a scissor-type lifting mechanism, is characterized in that: described scissor-type lifting mechanism comprises upper mounting plate (1), base (6), two outer support arms (3), two interior support arms (2), cylinder (5) and Lifting air sacs (4); Wherein upper mounting plate (1) and base (6) be arranged in parallel up and down; The middle part of an outer support arm (3) and an interior support arm (2) is hinged and form one group, outer support arm (3) often in group and the left end of interior support arm (2) utilize pinned connection front end or rear end on the left of the bottom surface of the surface of base (6) and upper mounting plate (1) respectively, right-hand member is separately installed with a roller, and roller can slide on the surface of the bottom surface of upper mounting plate (1) or base (6); Cylinder (5) lies in base (6) surface middle part, the left end surface middle part of one end and base (6) is hinged, the other end is connected by the bottom of pipe link with two interior support arms (2), and its upper cylinder body is connected with compressed air system by pipeline simultaneously; The lower end of Lifting air sac (4) is arranged on base (6) surface middle part, and is provided with gas-charging connection bottom it, and this gas-charging connection is connected by the pipeline of pipeline with cylinder (5).
2. scissor-type lifting mechanism according to claim 1, it is characterized in that: described Lifting air sac (4) is cylindrical structure, when charge condition, it is integrally made up of upper cylinder and lower cylinder, and the diameter of upper cylinder is greater than the diameter of lower cylinder, in the middle part of the bottom of simultaneously lower cylinder, be upwards recessed to form one for holding the strip shape groove of cylinder (5).
3. scissor-type lifting mechanism according to claim 1, is characterized in that: the range of described Lifting air sac (4) is less than the forced stroke of cylinder (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510237842.3A CN104944318A (en) | 2015-05-12 | 2015-05-12 | Shears-fork type lifting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510237842.3A CN104944318A (en) | 2015-05-12 | 2015-05-12 | Shears-fork type lifting mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104944318A true CN104944318A (en) | 2015-09-30 |
Family
ID=54159473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510237842.3A Pending CN104944318A (en) | 2015-05-12 | 2015-05-12 | Shears-fork type lifting mechanism |
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| CN (1) | CN104944318A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107337146A (en) * | 2016-12-30 | 2017-11-10 | 安徽江淮汽车集团股份有限公司 | A kind of bascule of lift master |
| CN110562879A (en) * | 2019-09-18 | 2019-12-13 | 武汉理工大学 | A gasbag formula lifting devices for AGV dolly |
| EP3587333A1 (en) * | 2018-06-25 | 2020-01-01 | Otis Elevator Company | Elevator car with a movable working platform |
| CN112320668A (en) * | 2020-09-29 | 2021-02-05 | 陕西科技大学 | Lifting machine |
| US11427441B2 (en) | 2020-07-23 | 2022-08-30 | Otis Elevator Company | Elevator car with foldable working platform |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100270523A1 (en) * | 2009-04-23 | 2010-10-28 | Maha Maschinenbau Haldenwang Gmbh & Co. Kg | Scissor lifting platform |
| CN102050405A (en) * | 2011-01-18 | 2011-05-11 | 中国人民解放军95989部队 | Scissor lifting device |
| CN202717550U (en) * | 2012-07-23 | 2013-02-06 | 金华市亚虎工具有限公司 | Electric lifting platform |
| CN103193179A (en) * | 2013-04-26 | 2013-07-10 | 宁波庆源机械有限公司 | Scissor-type airbag lifting machine |
| CN203740959U (en) * | 2014-03-10 | 2014-07-30 | 桂树国 | Lifting platform |
-
2015
- 2015-05-12 CN CN201510237842.3A patent/CN104944318A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100270523A1 (en) * | 2009-04-23 | 2010-10-28 | Maha Maschinenbau Haldenwang Gmbh & Co. Kg | Scissor lifting platform |
| CN102050405A (en) * | 2011-01-18 | 2011-05-11 | 中国人民解放军95989部队 | Scissor lifting device |
| CN202717550U (en) * | 2012-07-23 | 2013-02-06 | 金华市亚虎工具有限公司 | Electric lifting platform |
| CN103193179A (en) * | 2013-04-26 | 2013-07-10 | 宁波庆源机械有限公司 | Scissor-type airbag lifting machine |
| CN203740959U (en) * | 2014-03-10 | 2014-07-30 | 桂树国 | Lifting platform |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107337146A (en) * | 2016-12-30 | 2017-11-10 | 安徽江淮汽车集团股份有限公司 | A kind of bascule of lift master |
| EP3587333A1 (en) * | 2018-06-25 | 2020-01-01 | Otis Elevator Company | Elevator car with a movable working platform |
| CN110562879A (en) * | 2019-09-18 | 2019-12-13 | 武汉理工大学 | A gasbag formula lifting devices for AGV dolly |
| US11427441B2 (en) | 2020-07-23 | 2022-08-30 | Otis Elevator Company | Elevator car with foldable working platform |
| CN112320668A (en) * | 2020-09-29 | 2021-02-05 | 陕西科技大学 | Lifting machine |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150930 |