CN107265291A - Path internal expanding type self-locking sling - Google Patents
Path internal expanding type self-locking sling Download PDFInfo
- Publication number
- CN107265291A CN107265291A CN201710625497.XA CN201710625497A CN107265291A CN 107265291 A CN107265291 A CN 107265291A CN 201710625497 A CN201710625497 A CN 201710625497A CN 107265291 A CN107265291 A CN 107265291A
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- China
- Prior art keywords
- bracer
- suspension rod
- type self
- expanding type
- internal expanding
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/42—Gripping members engaging only the external or internal surfaces of the articles
- B66C1/44—Gripping members engaging only the external or internal surfaces of the articles and applying frictional forces
- B66C1/54—Internally-expanding grippers for handling hollow articles
- B66C1/56—Internally-expanding grippers for handling hollow articles for handling tubes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
The present invention relates to mechanical hoisting device field, specifically for a kind of path internal expanding type self-locking sling.Its of the invention main body is a suspension rod, includes being located at suspension rod upper end successively from top to bottom along length of boom direction and for the lifting portion for lifting path internal expanding type self-locking sling, the sliding sleeve that is set in outside suspension rod and can be slided up and down along suspension rod and the bracer for being separately positioned on the suspension rod left and right sides；First connecting rod is each hinged between bracer and sliding sleeve, at least two second connecting rods are hinged between each bracer and suspension rod and each second connecting rod be arranged in parallel from top to bottom；The lateral surface of each bracer is provided with CONTACT WITH FRICTION portion that can be with lifted object wall formation CONTACT WITH FRICTION.The present invention is wide to the lifting object internal diameter range of choice of clamping, and bearing is good and hoisting process does not produce slip phenomenon steadily.
Description
Technical field
The present invention relates to mechanical hoisting device field, specifically for a kind of path internal expanding type self-locking sling.
Background technology
Manufactured or logistics transportation field in equipment, be frequently necessary to carry out the lifting of object.And the process lifted is unavoidable
It is accomplished by using suspender, existing suspender is multifarious, different according to the object lifted, such as common hangs
Hook, hang pawl, electromagnet hanging apparatus etc..
In production and living, the weight for needing to lift " tubbiness " is frequently encountered, one of them typical example is in electricity
Machine equipment production field, needs to lift the stator of motor, it is understood that stator is tied for cylinder among the production process of motor
Structure and generally it is made up that quality is larger and its smooth in appearance of steel, if thus being easy to when being lifted using common claw suspender
Generation slips to produce danger；In addition with such as gasoline oil drum the problem of can also run into similar during lifting.
In this regard, only one China Patent No. 201610896738.X, patent (the following letter of entitled " internal-expansion type Three-jaw sling "
Referred to as contrast patent) a kind of scheme that can be used for slinging motor stator is disclosed, it outwards props up support from the inside of stator
Firmly the inwall of stator, make use of the physical principle of " self-locking " to avoid the risk slipped among the process of lifting again,
Largely solve the problem of stator hoisting.
However, the stator hanger still has certain technological deficiency, found by research, the suspender can only be used for lifting
The larger stator of internal diameter, and when the internal diameter of the stator lifted with the suspender is less than certain value, will go out during lifting
The phenomenon now slipped, and the smaller probability slipped of diameter of stator bore lifted is also bigger, thus drastic delimitations its
Popularization and application.
The content of the invention
The goal of the invention of the present invention is：A kind of path internal expanding type self-locking sling is provided, in its lifting object to clamping
Footpath range of choice is wide, and bearing is good and hoisting process does not produce slip phenomenon steadily.
The present invention is achieved through the following technical solutions：A kind of path internal expanding type self-locking sling, it is characterised in that：Its main body is
One suspension rod, includes being located at suspension rod upper end and is hung for lifting path internal expanding type self-locking successively from top to bottom along length of boom direction
The lifting portion of tool, it is set in suspension rod outer and the sliding sleeve that can be slided up and down along suspension rod and is separately positioned on the suspension rod left and right sides
Bracer；
First connecting rod is each hinged between bracer and sliding sleeve, at least two second are hinged between each bracer and suspension rod
Connecting rod and each second connecting rod be arranged in parallel from top to bottom；The lateral surface of each bracer is provided with can be with lifted object wall shape
Into the CONTACT WITH FRICTION portion of CONTACT WITH FRICTION.
Its operation principle and process are as follows：
In use, first pushing down on sliding sleeve, one end that first connecting rod is hinged with left bracer and right bracer is upturned respectively
So as to drive left bracer and right bracer outwards to strut, (principle is that first connecting rod, bracer, suspension rod and second connecting rod are collectively constituted
Similar four-bar mechanism, thus the movement of first connecting rod can drive bracer to move), it is branch with rear left bracer and right bracer
Support produces frictional force on the internal face of tubbiness hanging piece between bracer and inwall, bracer is understood according to physics force analysis
The downward reaction force (reaction force is the stiction that hanging piece applies to bracer) applied by hanging piece, so that support
Block is moved down, and is now deployed laterally according to the deformation principle second connecting rod of four-bar mechanism, and second connecting rod outwards deploys
Bracer is forced to continue outwards to prop up and (increase the normal pressure between bracer and inwall) again, between pressure and stiction
Relation understands that frictional force now between bracer and hanging piece inwall continues to increase, and understands hanging piece to support according to Newton's third law
The frictional force of block also increases simultaneously, so causes bracer to continue to move down (or trend) again, and and so on circulation is formd
The phenomenon of " self-locking ", so as to reach the effect of stable lifting.
Here it is not difficult to find out, either the contrast patent mentioned in of the invention or background technology is to rely on " self-locking "
Phenomenon come reach the purpose of lifting and ensure lifting stationarity, and pass through the above-mentioned further parsing to " self-locking " principle, I
It can be seen that actually two schemes in can be formed " self-locking " key most greatly enhanced with second connecting rod to both sides are extensible
Degree is relevant (as shown in figure 1, passing through geometrical analysis, it is known that the length a marked in Fig. 1 is described second connecting rod to both sides
Extensible maximum length a, contrast patent is similarly), and it can be seen from geometrical principle, connecting rod is to the extensible maximum length in both sides
The length of connecting rod is depended on again.Performance is leaned in order to ensure suspender self-locking, the length b of each group second connecting rod is all higher than bracer
To the distance between suspension rod c.(as shown in Figure 1)
Either the present invention still contrasts patent, and those skilled in the art obviously can be according to size of hanging piece etc. during fabrication
Ratio produces suspender, but according to similar triangle theory, compared with its connecting rod of the suspender of ting model to the extensible maximum in both sides
Length is obvious also smaller, and this numerical value it is too small when can then directly contribute and can not form self-locking.
Principle and the actual use purpose (lifting cylindrical weight) of combination suspender in accordance with the above, can be summarized
Go out this two suspender needs two key factors considered to have two in lifting, and one is the size of hanging piece, secondly being hanging piece
Quality.
We might as well once be compared the structure of the present invention and contrast patent now, it is seen that both most criticals
Difference appear on connecting rod and sliding support, specifically from the point of view of：
Second connecting rod one end is connected to the other end on bracer and is connected directly between on suspension rod in the present invention；And contrast the company of patent
Bar one end is again connected on bracer, but the other end is then first to be connected on sliding support then to install by sliding support again
On suspension rod.
Recognize after above difference, we, which carry out further to probe into again the suspender why contrasted in patent, can not be competent in small
The lifting problem of the annular hanging piece in footpath, specifically from the point of view of：
Because there is travel(l)ing rest outwardly convex certain wall thickness and articulated position to have to take certain length, it is clear that
When two suspender be designed to size it is consistent when (i.e. both are in bracer to the timing of distance one between suspension rod center line), it is of the invention in
Connecting rod it is more longer than connecting rod in patent so as to compare due to being not required to sliding support, which results in contrast patent
The relative length of connecting rod is relatively small.
It is not difficult to find out, when the hanging piece internal diameter very little lifted, the structure of connecting rod is due to having a cunning in contrast patent
Dynamic support so that its length become it is smaller, when the length of connecting rod is less than certain value, just influence whether connecting rod laterally
Expansion degree and then the success rate for influenceing its " self-locking "；
In addition to size, the invention original intention for a little exactly such suspender that we must also be noted that is for facilitating people
Mitigate certain manpower burden when lifting weight, therefore lifted is all the larger object of quality, therefore in design not
It can avoid needing analyzing down this problem again from the angle of engineering mechanics：
From the angle analysis of structural strength, the load-supporting part of core is suspension rod in contrast patent, thus no matter many small sizes
Hanger structure should be guaranteed that the diameter of suspension rod；Secondly, obviously also held as the component activity support of connection connecting rod and suspension rod
By huge load, thus it also must assure that it has enough thickness；
It can be seen that by sacrifice suspension rod and travel(l)ing rest size (briefly i.e. by using smaller diameter suspension rod and
The travel(l)ing rest of smaller wall thickness) so that connecting rod obtains longer length, such mode is definitely infeasible, because one
Denier sacrifices its overall structural strength, then it is without in all senses that such suspender, which is devised and used,.
And the present invention is then different, this structure of sliding support in contrast patent is eliminated in the present invention, so as to connecting rod
" vacateed " space of elongation, even thus use on the hanging piece of small size, also ensure that connecting rod has certain length
Spend and then ensure that the success rate of its " self-locking ".Meanwhile, also avoid the need for sacrificing the diameter of suspension rod, or even ensure that connecting rod
The bigger suspension rod of diameter can be used in the case of length instead and transform suspender so that suspender can sling heavier object.
In addition, further analysis contrasts patent, we can see that necessity that its sliding support belongs in contrast patent
Technical characteristic, reason is：
The suspender that patent is three-pawl type is contrasted, must be used in order that three bracers can be distributed on around suspension rod it
Structure as sliding support is as mounting bracket, once the structure is cancelled into the structure, then can cause to be difficult to three pawls are same
When be fixed on suspension rod without being interfered.
It can be seen that, this hanger structure of the invention not only eliminates the necessary structure in the former, while also greatly strengthen it
Technique effect, the problem of easily being slipped when successfully overcoming while lifting weight is not influenceed and lifting small internal diameter hanging piece.
In order to preferably implement this programme, following prioritization scheme is also provided：
Further, the bracer is by the left bracer being arranged on the left of suspension rod and the right bracer group being arranged on the right side of suspension rod
Into.
Further, the left bracer and right bracer are in strip and block.
Further, the outer middle side part of one of left bracer or right bracer deploys to horizontal two sides respectively provided with one
Arc platform.
Due to only designing two bracers in the present invention, and it is understood that three point contact is more stable, and the mesh of arc platform
Be exactly in order that bracer can provide the CONTACT WITH FRICTION portion of at least two different angles.
Further, the arc platform is provided with least two CONTACT WITH FRICTION portions, and each CONTACT WITH FRICTION part is located at arc
On the lateral surface of platform.
Further, the suspension rod is provided with the elastic component for being used to make sliding sleeve keep relative suspension rod slide downward trend.
Here, the purpose of elastic component be in order to lifting when allow left and right bracer open fully fitted with the internal face of hanging piece from
And ensure that an initial frictional force can be produced between bracer and hanging piece, that is, play a part of a pretension, so as to avoid
In the initial because phenomenon that is bad and causing hanging piece to slide of being fitted between bracer and hanging piece is produced of lifting.
It is preferred that, the elastic component is spring, elastic rod or rubber band.
It is believed that other can make the design of the mechanism or material of sliding sleeve slide downward without departing from the present invention,
Within protection scope of the present invention.
Further, the lifting portion is hanging piece.
Here, hanging piece can be the structure that handle, the suspension ring either class of suspension hook one are easy to user's lifting suspender.
Further, the lifting portion is mechanical arm, and the mechanical arm, which is provided with, to be used to control sliding sleeve relative to suspension rod
The controlling organization of lower slider.
It is preferred that, the controlling organization is cylinder, oil cylinder or electric rod.
It is believed that other can apply the mechanism for automatically controlling sliding sleeve slip on the robotic arm without departing from the present invention
Design, within protection scope of the present invention.
It is preferred that, in order to reach the purpose of frictional force further between increase CONTACT WITH FRICTION portion and hanging piece, the friction
Contact site is provided with non-slip texture or non-slipping block.
Than before for technology, beneficial effects of the present invention are：
1. the present invention has the structure simplified so that it can be well adapted for the lifting requirements of minor diameter hanging piece, hang
Difficultly slipped off when filling less hanging piece；
2. the present invention utilizes self-locking physics principle, its grasping force is directly proportional to the gravity of hanging piece, thus no matter which kind of is big
The hanging piece of quality being capable of stable grasp；
3. the present invention is simple in construction, manufacturing cost is cheap, it is easy to promote the use of a large area.
Brief description of the drawings
Fig. 1 is second connecting rod to the deployable length principle schematic diagram in both sides；
Fig. 2 is the stereogram of embodiment 1；
Fig. 3 is the front view of embodiment 1；
Fig. 4 is the top view of embodiment 1；
Fig. 5 is the stereogram of embodiment 2；
Fig. 6 is the front view of embodiment 2；
Fig. 7 is the top view of embodiment 2；
Fig. 8 is the stereogram of embodiment 3；
Fig. 9 is the front view of embodiment 3；
Figure 10 is the top view of embodiment 3；
Figure 11 is the front view of embodiment 4.
Label declaration：A- second connecting rods are to the extensible maximum length in both sides, the length of b- second connecting rods, c- bracers to hanging
The distance between bar, 1- suspension rods, 11- hanging pieces, 12- sliding sleeves, 131- springs, 132- elastic rods, 133- rubber bands, 2- bracers, 21-
CONTACT WITH FRICTION portion, 211- non-slip textures, the left bracers of 22-, the right bracers of 23-, 231- arcs platform, 3- first connecting rods, 4- second connect
Bar, 5- mechanical arms, 51- cylinders.
Embodiment
Illustrate to elaborate to the present invention below in conjunction with the accompanying drawings：
Embodiment 1：
As in Figure 2-4, it is simply to map, spring 131 is not drawn into the present embodiment main body for a suspension rod 1 in Fig. 2, along suspension rod
1 length direction from top to bottom successively include be located at the upper end of suspension rod 1 and for lift path internal expanding type self-locking sling lifting portion,
It is set in the sliding sleeve 12 that can be slided up and down outside suspension rod 1 and along suspension rod 1 and the bracer 2 for being separately positioned on the left and right sides of suspension rod 1；
First connecting rod 3 is each hinged between bracer 2 and sliding sleeve 12, at least two are hinged between each bracer 2 and suspension rod 1
Individual second connecting rod 4 and each second connecting rod 4 be arranged in parallel from top to bottom；The lateral surface of each bracer 2 is provided with can be with being lifted
The CONTACT WITH FRICTION portion 21 of object wall formation CONTACT WITH FRICTION.
Further, the bracer 2 is by being arranged on the left bracer 22 in the left side of suspension rod 1 and being arranged on the right side on the right side of suspension rod 1
Bracer 23 is constituted.
Further, the left bracer 22 and right bracer 23 are in strip and block.
Further, it is correspondingly provided with a CONTACT WITH FRICTION portion 21 on the lateral surface of the left bracer 22 and right bracer 23.
Further, the suspension rod 1 is provided with the elastic component for being used to make sliding sleeve 12 keep relative suspension rod slide downward trend.
Spring 131 is arranged between the hanging piece 11 of suspension rod 1 and sliding sleeve 12.
Further, the lifting portion is hanging piece (11).
It is preferred that, the CONTACT WITH FRICTION portion 21 is provided with non-slip texture 211.
Embodiment 2：
As illustrated in figs. 5-7, it is simply to map, elastic rod 132 is not drawn into the present embodiment main body for a suspension rod 1 in Fig. 5, and edge is hung
The length direction of bar 1 includes being located at the upper end of suspension rod 1 and the lifting for lifting path internal expanding type self-locking sling from top to bottom successively
Portion, it is set in suspension rod 1 outer and the sliding sleeve 12 that can be slided up and down along suspension rod 1 and the support for being separately positioned on the left and right sides of suspension rod 1
Block 2；
First connecting rod 3 is each hinged between bracer 2 and sliding sleeve 12, at least two are hinged between each bracer 2 and suspension rod 1
Individual second connecting rod 4 and each second connecting rod 4 be arranged in parallel from top to bottom；The lateral surface of each bracer 2 is provided with can be with being lifted
The CONTACT WITH FRICTION portion 21 of object wall formation CONTACT WITH FRICTION.
Further, the suspension rod 1 is provided with the elastic component for being used to make sliding sleeve 12 keep relative suspension rod slide downward trend.
Elastic rod 132 is arranged between the hanging piece 11 of suspension rod 1 and sliding sleeve 12.
Further, the bracer 2 is by being arranged on the left bracer 22 in the left side of suspension rod 1 and being arranged on the right side on the right side of suspension rod 1
Bracer 23 is constituted.
The outer middle side part of right bracer 23 is provided with an arc platform 231 deployed respectively to horizontal two sides.
Further, the arc platform 231 is provided with two CONTACT WITH FRICTION portions 21, and each CONTACT WITH FRICTION portion 21 is divided into arc
On the lateral surface of shape platform 231.
Further, the lifting portion is hanging piece (11).
It is preferred that, the CONTACT WITH FRICTION portion 21 is provided with non-slip texture 211.
Embodiment 3：
As seen in figs. 8-10, it is simply to map, rubber band 133 is not drawn into Fig. 8, the present embodiment main body is a suspension rod 1, edge
The length direction of suspension rod 1 includes being located at the upper end of suspension rod 1 and for lifting hanging for path internal expanding type self-locking sling from top to bottom successively
Dress portion, it is set in suspension rod 1 outer and the sliding sleeve 12 that can be slided up and down along suspension rod 1 and is separately positioned on the left and right sides of suspension rod 1
Bracer 2；
First connecting rod 3 is each hinged between bracer 2 and sliding sleeve 12, at least two are hinged between each bracer 2 and suspension rod 1
Individual second connecting rod 4 and each second connecting rod 4 be arranged in parallel from top to bottom；The lateral surface of each bracer 2 is provided with can be with being lifted
The CONTACT WITH FRICTION portion 21 of object wall formation CONTACT WITH FRICTION.
Further, the suspension rod 1 is provided with the elastic component for being used to make sliding sleeve 12 keep relative suspension rod slide downward trend.
One end of rubber band 133 is fixed on the bottom that the other end on sliding sleeve 12 is fixed on suspension rod 1.
Further, the bracer 2 is by being arranged on the left bracer 22 in the left side of suspension rod 1 and being arranged on the right side on the right side of suspension rod 1
Bracer 23 is constituted.
The outer middle side part of right bracer 23 is provided with an arc platform 231 deployed respectively to horizontal two sides.
Further, the arc platform 231 is provided with three CONTACT WITH FRICTION portions 21, and each CONTACT WITH FRICTION portion 21 is divided into arc
On the lateral surface of shape platform 231.
Further, the lifting portion is hanging piece (11).
It is preferred that, the CONTACT WITH FRICTION portion 21 is provided with non-slip texture 211.
Embodiment 4：
As shown in figure 11, the present embodiment main body is a suspension rod 1, includes being located at successively from top to bottom along the length direction of suspension rod 1
The upper end of suspension rod 1 and for lifting the lifting portion of path internal expanding type self-locking sling, to be set in suspension rod 1 outer and can be along suspension rod 1
The sliding sleeve 12 of lower slider and the bracer 2 for being separately positioned on the left and right sides of suspension rod 1；
First connecting rod 3 is each hinged between bracer 2 and sliding sleeve 12, at least two are hinged between each bracer 2 and suspension rod 1
Individual second connecting rod 4 and each second connecting rod 4 be arranged in parallel from top to bottom；The lateral surface of each bracer 2 is provided with can be with being lifted
The CONTACT WITH FRICTION portion 21 of object wall formation CONTACT WITH FRICTION.
Further, the bracer 2 is by being arranged on the left bracer 22 in the left side of suspension rod 1 and being arranged on the right side on the right side of suspension rod 1
Bracer 23 is constituted.
The outside of the right bracer 23 is provided with an arc platform 231 extended respectively to horizontal two sides, arc platform
231 lateral surface is provided with three CONTACT WITH FRICTION portions 21.
Further, the lifting portion is mechanical arm 5；The mechanical arm 5, which is provided with, is used to control sliding sleeve 12 relative to hanging
The controlling organization that bar 1 is slided up and down, the controlling organization is cylinder 51.
It is preferred that, the CONTACT WITH FRICTION portion 21 is provided with non-slip texture 211.
Although the present invention is illustrated and illustrated to the present invention using specific embodiment and its alternative, but it should reason
Solution, can implement without departing from the variations and modifications in the scope of the present invention.It is therefore understood that except by with
Outside the limitation of attached claim and its condition of equivalent, the present invention is not limited by all senses.
Claims (10)
1. a kind of path internal expanding type self-locking sling, it is characterised in that：Its main body is a suspension rod (1), along suspension rod (1) length direction certainly
Include being located at suspension rod (1) upper end and for lifting the lifting portion of path internal expanding type self-locking sling, being set in and hang successively under above
Bar (1) is outside and the sliding sleeve (12) that can be slided up and down along suspension rod (1) and the bracer for being separately positioned on suspension rod (1) left and right sides
(2)；
First connecting rod (3) is each hinged between bracer (2) and sliding sleeve (12), is hinged between each bracer (2) and suspension rod (1)
At least two second connecting rods (4) and each second connecting rod (4) be arranged in parallel from top to bottom；The lateral surface of each bracer (2) is provided with
The CONTACT WITH FRICTION portion (21) of CONTACT WITH FRICTION can be formed with lifted object wall.
2. path internal expanding type self-locking sling according to claim 1, it is characterised in that：The bracer (2) is hung by being arranged on
Left bracer (22) on the left of bar (1) and right bracer (23) composition being arranged on the right side of suspension rod (1).
3. path internal expanding type self-locking sling according to claim 2, it is characterised in that：The left bracer (22) and right bracer
(23) it is in strip and block.
4. path internal expanding type self-locking sling according to claim 2, it is characterised in that：Left bracer (22) or right bracer (23)
The outer middle side part of one of them is provided with an arc platform (231) deployed respectively to horizontal two sides.
5. path internal expanding type self-locking sling according to claim 4, it is characterised in that：Set on the arc platform (231)
There are at least two CONTACT WITH FRICTION portions (21), each CONTACT WITH FRICTION portion (21) is divided on the lateral surface of arc platform (231).
6. path internal expanding type self-locking sling according to claim 1, it is characterised in that：The suspension rod (1), which is provided with, to be used for
Sliding sleeve (12) is set to keep the elastic component of relative suspension rod slide downward trend.
7. path internal expanding type self-locking sling according to claim 6, it is characterised in that：The elastic component be spring (131),
Elastic rod (132) or rubber band (133).
8. the path internal expanding type self-locking sling according to claim 1-7 any one, it is characterised in that：The lifting portion is
Hanging piece (11).
9. the path internal expanding type self-locking sling according to claim 1-7 any one, it is characterised in that：The lifting portion is
Mechanical arm (5)；
The mechanical arm (5), which is provided with, to be used to control sliding sleeve (12) relative to the controlling organization that suspension rod (1) is slided up and down.
10. path internal expanding type self-locking sling according to claim 9, it is characterised in that：The controlling organization is cylinder
(51), oil cylinder or electric rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710625497.XA CN107265291B (en) | 2017-07-27 | 2017-07-27 | Small-diameter internal-expanding self-locking lifting appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710625497.XA CN107265291B (en) | 2017-07-27 | 2017-07-27 | Small-diameter internal-expanding self-locking lifting appliance |
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| Publication Number | Publication Date |
|---|---|
| CN107265291A true CN107265291A (en) | 2017-10-20 |
| CN107265291B CN107265291B (en) | 2020-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710625497.XA Active CN107265291B (en) | 2017-07-27 | 2017-07-27 | Small-diameter internal-expanding self-locking lifting appliance |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110217694A (en) * | 2019-06-17 | 2019-09-10 | 浙江安格鲁传动***有限公司 | A kind of suspender for belt molding die |
| CN110630405A (en) * | 2019-09-02 | 2019-12-31 | 湖北三江航天江河化工科技有限公司 | Expansion device for charging solid rocket engine and construction method |
| CN110877859A (en) * | 2019-11-19 | 2020-03-13 | 华北水利水电大学 | Hoisting equipment object taking device |
| JP2021038031A (en) * | 2019-08-30 | 2021-03-11 | いすゞ自動車株式会社 | Hanging tool for picking |
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| US4460210A (en) * | 1982-09-07 | 1984-07-17 | Miechur Joseph W | Lifting device |
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