CN101503942B - Special hinge for folding ladder and folding ladder for automobile - Google Patents
Special hinge for folding ladder and folding ladder for automobile Download PDFInfo
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- CN101503942B CN101503942B CN2009100259439A CN200910025943A CN101503942B CN 101503942 B CN101503942 B CN 101503942B CN 2009100259439 A CN2009100259439 A CN 2009100259439A CN 200910025943 A CN200910025943 A CN 200910025943A CN 101503942 B CN101503942 B CN 101503942B
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Abstract
The invention relates to a hinge special for a folding ladder and the folding ladder provided with the special hinge for vehicles, and belongs to the technical field of vehicle matching supplies. The hinge special for the folding ladder comprises two hinge plates which can be fixedly connected with both sections of the folding ladder, wherein the two hinge plates are mutually hinged and can be turned over around a hinging point; the two hinge plates are respectively provided with two lateral edges which are combined oppositely after being turned over, and at least one pair of matched combining pieces is arranged near the two lateral edges; when the two hinge plates are turned over around the hinging point along a positive direction and both the two sections of the folding ladder are spread, the combining pieces are mutually combined; and when the two hinge plates are turned over along an opposite direction and both the two sections of the folding ladder are folded, the combining pieces are mutually separated. The folding ladder for the vehicles is divided into at least two sections, and the hinge special for the folding ladder is arranged between the two sections. The hinge special for the folding ladder and the folding ladder provided with the special hinge for the vehicles can avoid the deformation after being pressed so as to improve the service life of the hinge and the ladder.
Description
Technical field
The present invention relates to a kind of hinge that is used for folding ladder, also relate to the folding ladder for automobile of installing this hinge simultaneously, belong to vehicle matching product technical field.
Background technology
Existing folding ladder generally is divided into two sections or multistage, and the overwhelming majority adopts hinge-coupled folding to form between its two sections.The sub-goods of suitable belt wheel that is equipped with such as present some cargo vehicles is (as motorcycle, bicycle) or wheeled go-cart walk in the above the loading folded ladder, hinge arrangement between two sections of this folding ladder as shown in Figure 1, two section 1 of folding ladder, 2 two sides are fixed with two pairs of carrier bars respectively, as shown in Figure 2, the a pair of carrier bar of every side is made of carrier bar 3 and 4 two of carrier bars, carrier bar 3 is by bolt 6,7 with one of two sections of folding ladder 1 fixing, carrier bar 4 is by bolt 8,922 fixing with two sections of folding ladder, carrier bar 3 and carrier bar 4 are hinged each other and can overturn two section 1 of the folding ladder after connecting so relatively by a bolt 5,2 can launch and fold each other.
But the inventor finds the above-mentioned existing hinge arrangement that can walk the loading folding ladder in actual use and has following defective:
1) state when existing folding ladder launches the back by goods as shown in Figure 4, the pressure F that the hinge place is subjected to is born by bolt 5 substantially, and during actual the use because the ground injustice, multiple reasons such as goods weight skewness and goods rock when walking, the goods gravity F of hinge place carrying can not all-the-time stable the bearing surface perpendicular to ladder, therefore goods gravity F will locate to produce direction along pin joint (bolt 5) and not stop the transverse component that changes, this transverse component promptly forms the torsion to carrier bar 3 and carrier bar 4, when this torsion overcomes frictional force (facts have proved that this frictional force is not enough to resist this torsion) between carrier bar 3 and carrier bar 4 contact surfaces, carrier bar 3 will misplace relatively and deform with carrier bar 4 (especially when pin joint is positioned at a bight of carrier bar 3 and carrier bar 4 the relative dislocation of easier generation and distortion), when misplacing and be out of shape greatly, will bring whole folding ladder gross distortion, thereby cause being difficult to even can't normally walk goods and normal folding and retraction, especially when the contact surface of carrier bar 3 and carrier bar 4 staggers fully, can cause folding ladder moment to be collapsed and security incident takes place.
2) existing folding ladder is made the generalization and the consideration that reduces cost for part, and its each section width is normally identical, and the thickness of same carrier bar 3 and carrier bar 4 is also identical; And carrier bar 3 and carrier bar 4 integral body only are to stagger hinged each other in its side simply and not in a plane (as shown in Figure 3).Therefore, when hinged each other carrier bar 3 and carrier bar 4 more respectively with after two sections of folding ladders connect, certainly will cause a wherein carrier bar (as among Fig. 3 being carrier bar 4) another piece carrier bar (as among Fig. 3 being carrier bar 3) inclination and generation flexural deformation (this moment carrier bar 3 and two crossing planes of carrier bar 4 actual formation) relatively, like this, carrier bar one is installed and is promptly formed distortion, has a strong impact on the application life of hinge and whole ladder.
3) as Fig. 2 and shown in Figure 4, during existing folding ladder upset and unfolded ladder two sections, two sections carrying sides (overlapping with the bearing surface of folding ladder) 10-1,10-2 after two carrier bars are involutory are in alignment with each other and are in same plane (promptly the angle of these two sections carryings side 10-1,10-2 is 180 degree), and therefore in use the pin joint of hinge (bolt 5) locates to bear very big power; Easily cause the fracture of pin joint place.(referring to back embodiment explanation)
4) the big and thin thickness of carrier bar 3 and carrier bar 4 equal areas, therefore stressed back is yielding.The folded ladder of this loading of walking is because pressurized when using tends to distortion, and especially hinge fraction just can't use after distortion is serious.
Summary of the invention
The technical problem to be solved in the present invention is: the shortcoming at above-mentioned existing folding ladder exists, the special hinge for folding ladder that a kind of difficult generation misplaces and is out of shape is relatively proposed, and a kind of folding ladder for automobile that uses this special hinge for folding ladder is proposed simultaneously.
One of technical scheme that the present invention solves the problems of the technologies described above is, a kind of special hinge for folding ladder, and comprising can be respectively and two sections of folding ladder two blocks of affixed flaps, hinged each other and can overturn around the hinged place between described two blocks of flaps; Described two blocks of flaps have the dual-side that upset is involutory respectively, are shaped at least one pair of conjunction that matches near the described dual-side respectively; When described two blocks of flaps during around upset of its hinged place forward and unfolded ladder two sections, described conjunction is bonded to each other; When described two blocks of flaps around its hinged place reverse flip and when closing up two sections of folding ladder, described conjunction is separated from one another.
Two of the technical scheme that the present invention solves the problems of the technologies described above is, a kind of folding ladder for automobile, be divided at least two sections, be equiped with special hinge for folding ladder between its two sections, described special hinge for folding ladder comprises can be respectively and two sections of folding ladder two blocks of affixed flaps, hinged each other and can overturn around the hinged place between described two blocks of flaps; Described two blocks of flaps have the dual-side that upset is involutory respectively, are shaped at least one pair of conjunction that matches near the described dual-side respectively; When described two blocks of flaps during around upset of its hinged place forward and unfolded ladder two sections, described conjunction is bonded to each other; When described two blocks of flaps around its hinged place reverse flip and when closing up two sections of folding ladder, described conjunction is separated from one another.
When using special hinge for folding ladder of the present invention and folding ladder for automobile like this, at flap during around upset of its hinged place forward and unfolded ladder two sections, except that original hinged place, form new connection (promptly two blocks of flaps form more than 2 and connect) by conjunction again between two blocks of involutory flaps, comparing existing flap has only a bit after involutory and connects, the present invention can make two blocks of flaps remain in the plane and constitute reliable stress point more than two (interface that is increased can provide much larger than the frictional force between the contact surface of the involutory back of existing flap), thereby can offset the horizontal torsion that two blocks of flaps are subjected to effectively, the relative dislocation of two blocks of flaps of prevention also deforms.And can close up two sections of folding ladder easily by the separation of conjunction during around its hinged place reverse flip at two blocks of flaps; Thereby can effectively resist pressure and not produce relative dislocation and distortion, not influence the folding of ladder again, and then the application life of improving hinge and ladder with torsion.
The improvement of one of technique scheme is that the integral body of described two blocks of flaps flushes each other and is in same plane.Like this, when two hinged each other flaps connect respectively when initial with two sections of folding ladder respectively, just can not form relative tilt and distortion.
The further improvement of one of technique scheme is, when described two blocks of flaps during around its hinged place forward upset and unfolded ladder two sections, the angles of two sections carrying sides after described two blocks of flaps are involutory are 170-176 degree.Like this, two blocks of flaps and continuous folding ladder thereof can form the arch bearing surface, can decompose the goods gravity that is carried by this arch bearing surface, and reduce the stressed of hinge thus, produce distortion thereby can slow down hinge, and then improve and use application life.
Description of drawings
The present invention is further illustrated below in conjunction with accompanying drawing.
Fig. 1 is the structural representation of existing folding ladder upper hinge part.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is an I place partial enlarged drawing among Fig. 1.
Fig. 4 is the stress schematic diagram of Fig. 2.
Fig. 5 is the structural representation of special hinge for folding ladder in the specific embodiment of the invention.
Fig. 6 is the vertical view of Fig. 5.
Fig. 7 is that flap turns over structural representation after the turnback relatively among Fig. 5.
Fig. 8 is the vertical view of Fig. 7.
Fig. 9 is the rear elevation of Fig. 7.
Figure 10 is the structural representation of one of flap of decomposing among Fig. 5.
Figure 11 is the left view of Figure 10.
Figure 12 is two a structural representation of the flap that decomposes among Fig. 5.
Figure 13 is the left view of Figure 12.
Figure 14 is the structural representation of folding ladder for automobile in the specific embodiment of the invention.
Figure 15 is the left view of Figure 14.
Figure 16 is an II place partial enlarged drawing among Figure 14.
Figure 17 is the user mode force analysis sketch of existing folding ladder hinge among Fig. 4.
Figure 18 is the user mode force analysis sketch of special hinge for folding ladder of the present invention among Fig. 7.
The specific embodiment
An embodiment of the special hinge for folding ladder specific embodiment of the present invention as shown in Figure 5, comprising can be respectively and two sections of folding ladder affixed two blocks of flaps 11,12, two flap 11,12 approximate trapezoid, on two blocks of flaps 11,12, be shaped on identical reinforcing rib 17 respectively, on two blocks of flaps 11,12, also be shaped on identical two couple (four) screw 21 respectively, the two pairs of screws 21 distribute along two blocks of flaps, 11,12 trapezoidal diagonal respectively, so that two sections by connector and folding ladder are affixed.As shown in Figure 5, hinged each other by bolt 13 between two blocks of flaps 11,12 in its trapezoidal bight, and can (bolt 13) overturn around the hinged place, structure was as shown in Figure 7 after two blocks of flaps 11,12 turned over turnback.As Fig. 6, shown in Figure 5, two blocks of flaps 11,12 have the dual-side that is involutory after the upset, this dual-side is formed with two first flanging 14-1,14-2 respectively, on two first flanging 14-1,14-2, be shaped on the conjunction that matches respectively, be cramp 15 on one of two first flangings 14-1 wherein, on two 14-2 of two first flangings is catching groove hole 16.As Fig. 6, Fig. 7, Fig. 8 and shown in Figure 9, relative opposite side is shaped on two second flanging 18-1,18-2 respectively in two blocks of flaps, 11,12 upset backs, wherein two 18-2 of one of two second flangings 18-1 and two second flangings oppositely bending each other; The end of two first flanging 14-1,14-2 forms two the 3rd flanging 19-1,19-2 again.As Fig. 8 and shown in Figure 9, also be shaped on two Fourth Fold 20-1,20-2 respectively near the side of two first flanging 14-1,14-2 respectively at two blocks of flaps 11,12.In addition, the reinforcing rib 17 on two flaps 11,12 and two second flanging 18-1,18-2 and two Fourth Fold 20-1,20-2 all can improve the strength and stiffness of two blocks of flaps 11,12.
One of two blocks of flaps after the decomposition 11 are as Figure 10, shown in Figure 11.Two blocks of flaps after the decomposition 2 12 as shown in Figure 12 and Figure 13,2 12 trapezoidal bight of two blocks of flaps is shaped on recess 22, the thickness basically identical of one of the degree of depth of recess 22 and two blocks of flaps 11 around near the hinged place.Like this when 11 and two blocks of flaps of one of two blocks of flaps 2 12 after its trapezoidal bight reclines, two blocks of flaps 11,12 only form the part at recess 22 places each other and stagger, the integral body of two blocks of flaps 11,12 then can remain in the plane (promptly flushing by the part of two blocks of flaps 11,12 integral body that exchanges two blocks of flaps 11,12 for that staggers), as shown in Figure 6.
As Fig. 5, Fig. 7 and shown in Figure 9, two first flanging 14-1,14-2 respectively and the angle between two Fourth Fold 20-1, the 20-2 be the 85-88 degree.As shown in Figure 7, when two blocks of flaps 11,12 (bolt 13) forward upset and unfolded ladder two sections around its hinged place, two first flanging 14-1,14-2 are involutory each other, and two Fourth Fold 20-1,20-2 place face are 170-176 degree as two sections angles that carry sides (these two sections carrying sides overlap with the bearing surface of folding ladder) of two blocks of flaps 11,12 respectively at this moment; As can be seen from Figure 7, these two sections carrying sides (being the bearing surface of folding ladder) are not in a plane and be little arch (these two sections carrying sides can be similar to the bearing surface of regarding arch bridge as).As Figure 17 and shown in Figure 180,1), Figure 17 is existing folding ladder hinge stressed sketch in use be analyzed existing folding ladder hinge and present embodiment special hinge for folding ladder stressing conditions in use as follows:, two sections carrying sides after two carrier bars of hinge are involutory are in alignment with each other and are in same plane, pin joint (bolt 13) with the stressed maximum of hinge locates to be the stress point analysis, and the goods gravity F of hinge carrying herein is finally by the support force F of ladder two ends
1And F
2Bear, i.e. F=F
1+ F
2, and the active force between two blocks of flaps cancels each other out, i.e. F
Hinge 1+ F
Hinge 2=0.
2), Figure 18 is present embodiment special hinge for folding ladder stressed sketch in use, the goods gravity F of hinge carrying this moment can be considered respectively two decomposing force F along two sections load sides of two blocks of flaps towards the ladder two ends
3And F
4(pressure that is equivalent on the arch bridge decomposes to two ends along the arch face of bridge), two decomposing force F
3And F
4Be decomposed into F in the ladder two ends
3 hang down, F
3 is flatAnd F
4 hang down, F
4 is flat, the goods gravity F=F of hinge carrying wherein
3 hang down+ F
4 hang down, and the directed force F between this moment two blocks of flaps
Hinge 3+ F
Hinge 4=0, but because F
Hinge 1=F
Hinge 3+ F
3 is flat, F
Hinge 2=F
Hinge 4+ F
4 is flat, so F
Hinge 3＜F
Hinge 1, F
Hinge 4＜F
Hinge 2, that is to say that the active force between two blocks of flaps that are arch this moment has reduced than the active force between existing two blocks of flaps.This shows that the special hinge for folding ladder of present embodiment is little arch by two sections carrying sides after making two blocks of flaps 11,12 involutory, can effectively reduce the stressed of hinge, produces distortion thereby can slow down hinge, and then improves and use application life.
The folding ladder for automobile of present embodiment, as Figure 14, shown in Figure 15, folding ladder is divided into two sections, is respectively epimere 1-1 and hypomere 1-2, is equiped with the special hinge for folding ladder of above-mentioned present embodiment on the two sides between epimere 1-1 and the hypomere 1-2 respectively.As shown in figure 16, the integral body of the two blocks of flaps 11,12 that assemble is in the same plane, also just makes folding ladder epimere 1-1 and hypomere 1-2 self align.As shown in figure 14, every section folding ladder comprises two identical longerons 24 of parallel interval and is connected in a plurality of strut rails 25 of parallel interval between two longerons 24, longeron 24 and crosspiece 25 form by the sheet material bending, and wherein one of flap 11 is fixedly connected to bolt 22 by following with the longeron 24 of hypomere 1-2; The longeron 24 of 2 12 and epimere 1-1 of flap is fixedly connected to bolt 23 by last.When being fixedly connected, an end of longeron 24 just in time is plugged on the trapezoidal faces of flap 11,12 by the first flanging 14-1,14-2, and one of second flanging 18-1,18-2 and Fourth Fold 20-1,20-2 are respectively from the groove that three faces surround.
Present embodiment special hinge for folding ladder and folding ladder for automobile are in use, when two blocks of flaps 11,12 around its hinged place when two sections of the epimere 1-1 of (bolt 13) forward upset and unfolded ladder and hypomere 1-2, cramp 15 on one of first flanging 14-1 just is bonded to each other in the catching groove hole 16 on two 14-2 that just in time buckle into first flanging, so just make two blocks of flaps 11,12 are fixed in the plane and form two stress points, when flap is stressed, can make the flap pressure all the time in a plane, can not produce distortion to effectively resisting of pressure thereby can significantly improve.Obviously, when two blocks of flaps 11,12 around its hinged place (bolt 13) reverse flip and close up the epimere 1-1 of folding ladder and during two sections of hypomere 1-2, cramp 15 just is easy to deviate from catching groove hole 16 and is separated from one another.
The present invention is not limited to described in the foregoing description, as 1) cramp 15 and catching groove hole 16 also can substitute by fastener member or other conjunctions; 2) conjunction such as cramp 15 and catching groove hole 16 also can be formed on two Fourth Fold 20-1 respectively, 20-2 is last or be formed on respectively near near the two sides the involutory dual-side of two blocks of flaps, 11,12 upsets, as long as be positioned near this dual-side; 3) conjunction such as cramp and catching groove hole also can two pairs or how right; 4) recess 22 also can be on one of flap 11, its degree of depth and flap 2 12 consistent; 5) two blocks of flaps 11,12 can also adopt other modes to keep integral body to flush except flushing by recess 22 maintenance integral body; 6) two blocks of flaps 11,12 also can be square or other quadrangles, polygon; 7) two blocks of flaps 11,12 also can save first, second, third and Fourth Fold; Or the like.In addition to the implementation, all employings are equal to or the technical scheme that forms is replaced in equivalence, all drop on the protection domain of requirement of the present invention.
Claims (6)
1. special hinge for folding ladder, comprising can be respectively and two sections of folding ladder two blocks of affixed flaps, hinged each other and can overturn around the hinged place between described two blocks of flaps; Described two blocks of flaps have the dual-side that upset is involutory respectively, it is characterized in that: be shaped at least one pair of conjunction that matches near the described dual-side respectively; When described two blocks of flaps during around upset of its hinged place forward and unfolded ladder two sections, described conjunction is bonded to each other; When described two blocks of flaps around its hinged place reverse flip and when closing up two sections of folding ladder, described conjunction is separated from one another; The integral body of described two blocks of flaps flushes each other and is in same plane; When described two blocks of flaps during around upset of its hinged place forward and unfolded ladder two sections, the angles of two sections carrying sides after described two blocks of flaps are involutory are 170-176 degree.
2. according to the described special hinge for folding ladder of claim 1, it is characterized in that: be shaped on recess near the hinged place of one of described two blocks of flaps, the thickness basically identical of another flap of described concave depth and described two blocks of flaps.
3. according to the described special hinge for folding ladder of claim 2, it is characterized in that: described dual-side is formed with two first flangings, described conjunction is to lay respectively at cramp and the catching groove hole that corresponds to each other on two first flangings, be shaped on identical reinforcing rib respectively on described two blocks of flaps, the relative opposite side in described two blocks of flaps upset back is shaped on two second flangings respectively, described two second flangings are oppositely bending each other, one end of described two first flangings forms two the 3rd flangings, described two blocks of flaps also are shaped on two Fourth Folds respectively near a side of two first flangings, and described two sections carrying sides are respectively two Fourth Fold place faces.
4. according to the arbitrary described special hinge for folding ladder of claim 1-3, it is characterized in that: described two flap approximate trapezoid, also be shaped on identical a pair of screw on it respectively, every pair of screw distributes along the trapezoidal diagonal of flap respectively.
5. a folding ladder for automobile is divided at least two sections, it is characterized in that: be equiped with special hinge for folding ladder according to claim 1 between its two sections.
6. according to the described folding ladder for automobile of claim 5, it is characterized in that: every section folding ladder comprises two longerons of parallel interval and is connected in a plurality of strut rails of parallel interval between the longeron that described longeron and crosspiece form by the sheet material bending.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100259439A CN101503942B (en) | 2009-03-12 | 2009-03-12 | Special hinge for folding ladder and folding ladder for automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100259439A CN101503942B (en) | 2009-03-12 | 2009-03-12 | Special hinge for folding ladder and folding ladder for automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101503942A CN101503942A (en) | 2009-08-12 |
| CN101503942B true CN101503942B (en) | 2011-05-11 |
Family
ID=40976304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100259439A Active CN101503942B (en) | 2009-03-12 | 2009-03-12 | Special hinge for folding ladder and folding ladder for automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101503942B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112635954B (en) * | 2020-12-07 | 2022-12-16 | 上海卫星工程研究所 | Foldable space antenna on-orbit unfolding self-locking driving hinge and control method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4428458A (en) * | 1981-05-28 | 1984-01-31 | Turbo Inc. | Foldable ladder |
| CN2567331Y (en) * | 2002-07-12 | 2003-08-20 | 林进财 | Toggle device used on ladder for forming V-ladder or long ladder |
| CN2622371Y (en) * | 2003-06-02 | 2004-06-30 | 高力登 | Combined multi-purpose double-ladder |
| CN2784566Y (en) * | 2005-03-23 | 2006-05-31 | 安徽新力电气设备有限责任公司 | Multi-station collapsible ladder for electrician |
| CN101131066A (en) * | 2007-10-11 | 2008-02-27 | 王万兴 | Dual-purpose telescopic ladder |
| CN201386504Y (en) * | 2009-03-12 | 2010-01-20 | 江苏舜天国际集团苏迈克斯工具有限公司 | Special hinge for folding ladder and vehicle folding ladder |
-
2009
- 2009-03-12 CN CN2009100259439A patent/CN101503942B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4428458A (en) * | 1981-05-28 | 1984-01-31 | Turbo Inc. | Foldable ladder |
| CN2567331Y (en) * | 2002-07-12 | 2003-08-20 | 林进财 | Toggle device used on ladder for forming V-ladder or long ladder |
| CN2622371Y (en) * | 2003-06-02 | 2004-06-30 | 高力登 | Combined multi-purpose double-ladder |
| CN2784566Y (en) * | 2005-03-23 | 2006-05-31 | 安徽新力电气设备有限责任公司 | Multi-station collapsible ladder for electrician |
| CN101131066A (en) * | 2007-10-11 | 2008-02-27 | 王万兴 | Dual-purpose telescopic ladder |
| CN201386504Y (en) * | 2009-03-12 | 2010-01-20 | 江苏舜天国际集团苏迈克斯工具有限公司 | Special hinge for folding ladder and vehicle folding ladder |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平10-61357A 1998.03.03 |
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| CN101503942A (en) | 2009-08-12 |
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