CN103708023B - Middle self-locking cabin door stay bar - Google Patents
Middle self-locking cabin door stay bar Download PDFInfo
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- CN103708023B CN103708023B CN201310744666.3A CN201310744666A CN103708023B CN 103708023 B CN103708023 B CN 103708023B CN 201310744666 A CN201310744666 A CN 201310744666A CN 103708023 B CN103708023 B CN 103708023B
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- urceolus
- expansion link
- steel ball
- hole
- ring
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Abstract
In the middle of the present invention, self-locking cabin door stay bar includes expansion link, urceolus, lining and spring；Urceolus hollow, and it is socketed in the outside of expansion link, outer tube wall is provided with several manholes, and the center of circle of these through holes is all at the same cross section of urceolus, and each through hole is built-in with the degree of depth radius more than or equal to steel ball of a steel ball and through hole；The outer wall of expansion link is provided with a ring-type water jacket；The degree of depth of through hole is equal with described steel ball size with the degree of depth sum of ring-type water jacket；Spring is fixedly linked with outer drum outer wall away from one end of expansion link, is connected with lining near one end of expansion link；Lining is the tubular of hollow, it is socketed in the outside of urceolus, and lining is provided with annular inner groove towards the inwall of urceolus, the deep equality of the degree of depth of annular inner groove and ring-type water jacket, when mobile lining makes annular inner groove communicate with through hole, steel ball is arranged in annular inner groove and through hole。The use of the present invention is quite convenient, and reliability is high。
Description
Technical field
The present invention relates to aircraft or the fixed support part of helicopter hatch door or hatchcover。
Background technology
What be presently used for all kinds of aircraft radome safeguards that the telescopic air spring of the generally individually employing of hatch door is to complete the unlatching of hatch door, support and closedown。Because air spring has lifting force, in use supporting hinges need to deflect past the rotary gemel of hatch door, and door just can be made to close smoothly。As it is shown in figure 1, B point inclined line having crossed hatch door hinge AO when hatch door is closed, hatch door can be closed smoothly。Owing to some special constructions of aircraft limit, use air spring cannot deflect past hatch door hinge, and the opening force producing hatch door makes hatch door not close。As in figure 2 it is shown, B point not inclined line having crossed hatch door hinge AO when hatch door is closed, under the effect of air spring lifting force, hatch door cannot be closed。
Summary of the invention
It is desirable to provide self-locking cabin door stay bar in the middle of a kind of, it is both scalable, can complete again secure support, can also meet hatch door requirement under opening and closing two states simultaneously。
Middle self-locking cabin door stay bar of the present invention, including expansion link, urceolus, lining and spring；Urceolus hollow, and it is socketed in the outside of expansion link, outer tube wall is provided with several manholes, and the center of circle of these through holes is all at the same cross section of urceolus, and each through hole is built-in with the degree of depth of a steel ball and through hole more than or equal to the radius of steel ball but less than the diameter of steel ball；The outer wall of expansion link is provided with a ring-type water jacket；The degree of depth of through hole is equal with described steel ball size with the degree of depth sum of ring-type water jacket, and when moving telescopic bar makes ring-type water jacket communicate with through hole, steel ball is arranged in ring-type water jacket and through hole；Spring is fixedly linked with outer drum outer wall away from one end of expansion link, is connected with lining near one end of expansion link；Lining is the tubular of hollow, it is socketed in the outside of urceolus, lining is provided with annular inner groove towards the inwall of urceolus, the degree of depth of annular inner groove is more than or equal to the degree of depth with ring-type water jacket but less than the diameter of steel ball, when mobile lining makes annular inner groove communicate with through hole, steel ball is arranged in annular inner groove and through hole；When spring is when extended configuration, lining than through hole closer to expansion link, when spring is when most compressed state, lining than annular aperture further from expansion link。
Preferably, through hole being projected as in the plane at urceolus arbitrary shaft section place is square, and this square length is more than or equal to the diameter of steel ball；The internal groove side wall of ring-type water jacket being projected as along laterally zygomorphic two the bad circular arcs of urceolus axis in the plane at urceolus arbitrary shaft section place, the two bad circular arc place diameter of a circle is equal, is all higher than or is equal to the diameter of steel ball；The projection in the plane at urceolus arbitrary shaft section place of the internal groove side wall of annular inner groove is also that the two bad circular arc place diameter of a circle is equal along urceolus axis laterally zygomorphic two bad circular arcs, is all higher than or is equal to the diameter of steel ball。
Or preferably, through hole being projected as in the plane at urceolus arbitrary shaft section place is square, and this square length is more than or equal to the diameter of steel ball；The internal groove side wall of ring-type water jacket in the plane at urceolus arbitrary shaft section place be projected as along urceolus axis laterally zygomorphic two trapezoidal, two trapezoidal bottoms are close to urceolus, and bottom more than or equal in circle with trapezoidal with the chord length corresponding to high arc, described circle is equal with steel ball size；The projection in the plane at urceolus arbitrary shaft section place of the internal groove side wall of annular inner groove be also along urceolus axis laterally zygomorphic two trapezoidal, two trapezoidal bottoms are close to urceolus, and bottom more than or equal in circle with trapezoidal with the chord length corresponding to high arc, described circle is equal with steel ball size。
It is highly preferred that also include solving lock tube and back-up ring；Back-up ring is raised on the outer wall of urceolus, and spring is fixedly linked each through back-up ring and outer drum outer wall away from one end of expansion link；Solving lock tube is the tubular of hollow, and it is socketed in the outside of back-up ring, spring and lining, and it is fixed near one end of expansion link near one end of expansion link and lining and is connected。
It is further preferred that also include solving the stopping means that lock tube slides。
In one further preferred embodiment, stopping means is fixedly set the spacing ring on the outer wall of described urceolus, and this stopping means is than solving lock tube further from expansion link；Sliding into stopping means place when solving lock tube, annular inner groove communicates with through hole。
Or in another further preferred embodiment, stopping means is also fixedly set the spacing ring on the outer wall of described urceolus, but it is on the outer drum outer wall solved between lock tube and urceolus。Solve that lock tube inwall is provided accordingly to that internal diameter is different two sections, wherein away from the internal diameter of a section of the expansion link external diameter less than stopping means, near the internal diameter of a section of the expansion link external diameter more than stopping means。
Or at another it is preferred that embodiment in, it is not necessary to stopping means is set, only need to select the spring of suitable stroke, when solving lock tube and sliding into design attitude, spring is compressed to minimum length, and now annular inner groove just communicates completely with through hole, and steel ball enters in annular inner groove and through hole。
Or it is further preferred that urceolus, expansion link, lining is conciliate lock tube and is cylindrical shape。
Or it is further preferred that through hole is provided with four。
Compared with prior art, the present invention may be used for supporting and all kinds of in aircraft radome safeguards hatch door, to installation site and mode without strict demand when it is installed, open at hatch door and only expansion link need to be stretched, urceolus and expansion link are blocked by steel ball, and strut gets final product auto lock, and provides stable support。When hatch door is closed, being promoted to compression direction by lining, make steel ball skid off from expansion link, slip in lining, urceolus and expansion link unlock, and hatch door can be closed。The use of the present invention is quite convenient, meets all kinds of reliable requests safeguarding that hatch door supports in aircraft radome, improves the efficiency of aircraft maintenance。
Accompanying drawing explanation
Fig. 1 is the operable structural representation of air spring in prior art。
Fig. 2 is the structural representation that in prior art, air spring cannot use。
Fig. 3 is the shaft section partial schematic sectional view of middle self-locking cabin door stay bar in embodiment one。
In figure, 1-union joint, 2-urceolus, 3-solves lock tube, 4-back-up ring, 5-air spring, 6-spring, 7-locating ring, 8-steel ball, 9-lining, 10-fairlead, 11-expansion link, 12-joint, 13-oscillating bearing, 14-supporting hinges, 15-hatch door hinge, 16-stopping means。
Detailed description of the invention
Embodiment one
As it is shown on figure 3, the middle self-locking cabin door stay bar of the present invention, including back-up ring 4, spring 6, cylindric urceolus 2, expansion link 11, lock tube 3 conciliate by lining 9；Urceolus 2 hollow, right-hand member is socketed in the outside of expansion link 11 left end, and urceolus 2 wall is provided with 4 through holes, and the center of circle of these through holes is all at the same cross section of urceolus 2, and each through hole is built-in with a steel ball 8。Expansion link 11 left end termination is provided with a locating ring welded with it 7, and the outer wall of locating ring 7 is provided with a ring-type water jacket being perpendicular to urceolus central shaft。In the present embodiment, for the convenience manufacturing and installing, ring-type water jacket is arranged on locating ring 7, it is also possible to according to circumstances, directly ring-type water jacket is arranged on expansion link 11, or locating ring 7 is considered as a part for expansion link 11。
Lining 9 is the tubular of hollow, and it is socketed in the outside of urceolus 2, and the inwall of lining 9 and urceolus 2 junction is provided with the annular inner groove being perpendicular to urceolus central shaft。Back-up ring 4 is raised on the outer wall of urceolus 2, and spring 6 left end is fixedly linked by back-up ring 4 and urceolus 2 outer wall, and right-hand member and lining 9 are fixedly linked；Solving lock tube 3 is the cylindrical shape of hollow, and it is socketed in back-up ring 4, the outside of spring 6 and lining 9, and left end slides on urceolus 2, and right-hand member is fixing near one end of expansion link 11 with lining 9 to be connected。When spring 6 is when extended configuration, lining 9 than through hole closer to expansion link 11, when spring 6 is when most compressed state, lining 9 than annular aperture further from expansion link 11。
In order to when preventing expansion link 11 from pulling out from urceolus 2 because careless manipulation falls off, it is provided with the cylindric fairlead 10 being connected with this end of urceolus 2 near one end of expansion link 11 at urceolus 2, this fairlead 10 is fixedly linked with urceolus 2, and expansion link 11 is stuck in urceolus 2, so as to cannot be backing out from urceolus 2。
In order to make steel ball 8 can slide into and out annular inner groove and ring-type water jacket smoothly, realize unlocking and locking, the degree of depth of through hole more than or equal to steel ball 8 radius but less than the diameter of steel ball 8, the degree of depth sum of the degree of depth of through hole and ring-type water jacket and described steel ball 8 equal diameters, the degree of depth of annular inner groove is more than or equal to the degree of depth with ring-type water jacket but less than the diameter of steel ball 8。Through hole being projected as in the plane at urceolus 2 arbitrary shaft section place is square, and this square length is more than or equal to the diameter of steel ball 8；The internal groove side wall of ring-type water jacket in the plane at urceolus 2 arbitrary shaft section place be projected as along urceolus 2 axis laterally zygomorphic two trapezoidal, two trapezoidal bottoms are close to urceolus 2, and bottom more than or equal in circle with trapezoidal with the chord length corresponding to high arc, described circle and steel ball 8 equal diameters；The projection in the plane at urceolus 2 arbitrary shaft section place of the internal groove side wall of annular inner groove be also along urceolus 2 axis laterally zygomorphic two trapezoidal, two trapezoidal bottoms are close to urceolus 2, and bottom more than or equal in circle with trapezoidal with the chord length corresponding to high arc, described circle and steel ball 8 equal diameters。When moving telescopic bar 11 makes ring-type water jacket communicate with through hole, steel ball 8 is arranged in ring-type water jacket and through hole；When mobile lining 9 makes annular inner groove communicate with through hole, steel ball 8 is arranged in annular inner groove and through hole。
Additionally, be also fixedly provided with stopping means 16 on the outer wall of urceolus 2, this stopping means 16 is than solving lock tube 3 further from expansion link 11；When solving lock tube 3 and sliding into stopping means 16, when solution lock tube 3 is kept off by stopping means 16, now annular inner groove communicates with through hole。So it is more convenient for when operating, determining the sliding position solving lock tube 3。
During use, being connected with union joint 1 away from one end of expansion link 11 by urceolus 2, expansion link 11 is connected with joint 12 away from one end of urceolus 2, and joint 12 is connected with oscillating bearing 13, then union joint 1 and oscillating bearing 13 respectively with hatch door, the hinge in nacelle be connected。When opening hatch door, expansion link 11 stretches out from urceolus 2, and when annular aperture connects with ring-type water jacket, steel ball 8 slips into ring-type water jacket, makes urceolus 2 and expansion link 11 that relative displacement cannot occur, thus realizing hatch door to open the stable support of pass acquisition。Now due to the effect of spring force, lining 9 closer to expansion link, can make steel ball 8 locked in ring-type water jacket, it is achieved auto-lock function。At closing time, promote solving lock tube 3 to the direction away from expansion link 11, make annular inner groove connect with annular aperture, steel ball 8 skids off ring-type water jacket, slips into annular inner groove, and then relative displacement can occur for urceolus 2 and expansion link 11, expansion link 11 extend in urceolus 2, and hatch door is closed。
Embodiment two
The middle self-locking cabin door stay bar of the present invention, including back-up ring 4, spring 6, cylindric urceolus 2, expansion link 11, lock tube 3 conciliate by lining 9；Urceolus 2 hollow, right-hand member is socketed in the outside of expansion link 11 left end, and urceolus 2 wall is provided with 4 through holes, and the center of circle of these through holes is all at the same cross section of urceolus 2, and each through hole is built-in with a steel ball 8。Expansion link 11 left end termination is provided with a locating ring welded with it 7, and the outer wall of locating ring 7 is provided with a ring-type water jacket。In the present embodiment, for the convenience manufacturing and installing, ring-type water jacket is arranged on locating ring 7, it is also possible to according to circumstances, directly ring-type water jacket is arranged on expansion link 11, or locating ring 7 is considered as a part for expansion link 11。
Lining 9 is the tubular of hollow, and it is socketed in the outside of urceolus 2, and the inwall of lining 9 and urceolus 2 junction is provided with annular inner groove。Back-up ring 4 is raised on the outer wall of urceolus 2, and spring 6 left end is fixedly linked by back-up ring 4 and urceolus 2 outer wall, and right-hand member and lining 9 are fixedly linked；Solving lock tube 3 is the cylindrical shape of hollow, and it is socketed in back-up ring 4, the outside of spring 6 and lining 9, and left end slides on urceolus 2, and right-hand member is fixing near one end of expansion link 11 with lining 9 to be connected。When spring 6 is when extended configuration, lining 9 than through hole closer to expansion link 11, when spring 6 is when most compressed state, lining 9 than annular aperture further from expansion link 11。
In order to when preventing expansion link 11 from pulling out from urceolus 2 because careless manipulation falls off, it is provided with the cylindric fairlead 10 being connected with this end of urceolus 2 near one end of expansion link 11 at urceolus 2, this fairlead 10 is fixedly linked with urceolus 2, and expansion link 11 is stuck in urceolus 2, so as to cannot be backing out from urceolus 2。
In order to make steel ball 8 can slide into and out annular inner groove and ring-type water jacket smoothly, realize unlocking and locking, the degree of depth of through hole more than or equal to the radius of steel ball 8, the degree of depth sum of the degree of depth of through hole and ring-type water jacket and described steel ball 8 equal diameters, the deep equality of the degree of depth of annular inner groove and ring-type water jacket。Through hole being projected as in the plane at urceolus 2 arbitrary shaft section place is square, and this square length is more than or equal to the diameter of steel ball 8；The internal groove side wall of ring-type water jacket being projected as along laterally zygomorphic two the bad circular arcs of urceolus 2 axis in the plane at urceolus 2 arbitrary shaft section place, the two bad circular arc place diameter of a circle is equal, is all higher than or is equal to the diameter of steel ball 8；The projection in the plane at urceolus 2 arbitrary shaft section place of the internal groove side wall of annular inner groove is also that the two bad circular arc place diameter of a circle is equal along urceolus 2 axis laterally zygomorphic two bad circular arcs, is all higher than or is equal to the diameter of steel ball 8。When moving telescopic bar 11 makes ring-type water jacket communicate with through hole, steel ball 8 is arranged in ring-type water jacket and through hole；When mobile lining 9 makes annular inner groove communicate with through hole, steel ball 8 is arranged in annular inner groove and through hole。
Additionally, be also fixedly provided with spacing ring on the outer wall of urceolus 2, but it is on urceolus 2 outer wall solved between lock tube 3 and urceolus 2。Solve that lock tube 3 inwall is provided accordingly to that internal diameter is different two sections, wherein away from the internal diameter of a section of expansion link 11 external diameter less than spacing ring, near the internal diameter of a section of expansion link 11 external diameter more than spacing ring。
Or in another preferred embodiment, it is not necessary to stopping means is set, only need to select the spring 6 of suitable stroke, when solving lock tube 3 and sliding into design attitude, spring 6 is compressed to minimum length, and now annular inner groove just communicates completely with through hole, and steel ball 8 enters in annular inner groove and through hole。
During use, being connected with union joint 1 away from one end of expansion link 11 by urceolus 2, expansion link 11 is connected with joint 12 away from one end of urceolus 2, and joint 12 is connected with oscillating bearing 13, then union joint 1 and oscillating bearing 13 respectively with hatch door, hinge in nacelle is connected, and when opening hatch door, expansion link 11 stretches out from urceolus 2, when annular aperture connects with ring-type water jacket, steel ball 8 slips into ring-type water jacket, makes urceolus 2 and expansion link 11 that relative displacement cannot occur, thus realizing hatch door to open the stable support of pass acquisition。At closing time, promote solving lock tube 3 to the direction away from expansion link 11, make annular inner groove connect with annular aperture, steel ball 8 skids off ring-type water jacket, slips into annular inner groove, and then relative displacement can occur for urceolus 2 and expansion link 11, expansion link 11 extend in urceolus 2, and hatch door is closed。
Claims (8)
1. middle self-locking cabin door stay bar, it is characterised in that include expansion link (11), urceolus (2), lining (9) and spring (6)；Urceolus (2) hollow, and it is socketed in the outside of expansion link (11), urceolus (2) wall is provided with several manholes, the center of circle of these through holes is all at the same cross section of urceolus (2), and each through hole is built-in with the degree of depth of a steel ball (8) and through hole more than or equal to the radius of steel ball (8) but less than the diameter of steel ball (8)；The outer wall of expansion link (11) is provided with a ring-type water jacket；The degree of depth sum of the degree of depth of through hole and ring-type water jacket and described steel ball (8) equal diameters, when moving telescopic bar (11) makes ring-type water jacket communicate with through hole, steel ball (8) is arranged in ring-type water jacket and through hole；Spring (6) is fixedly linked with urceolus (2) outer wall away from one end of expansion link (11), is connected with lining (9) near one end of expansion link (11)；The tubular that lining (9) is hollow, it is socketed in the outside of urceolus (2), lining (9) is provided with annular inner groove towards the inwall of urceolus (2), the degree of depth of annular inner groove is more than or equal to the degree of depth with ring-type water jacket but less than the diameter of steel ball (8), when mobile lining (9) makes annular inner groove communicate with through hole, steel ball (8) is arranged in annular inner groove and through hole；When spring (6) is when extended configuration, lining (9) than through hole closer to expansion link (11), when spring (6) is when most compressed state, lining (9) than annular aperture further from expansion link (11)。
2. self-locking cabin door stay bar in the middle of as claimed in claim 1, it is characterised in that through hole being projected as in the plane at urceolus (2) arbitrary shaft section place is square, and this square length is more than or equal to the diameter of steel ball (8)；The internal groove side wall of ring-type water jacket is projected as along laterally zygomorphic two the bad circular arcs of urceolus (2) axis in the plane at urceolus (2) arbitrary shaft section place, the two bad circular arc place diameter of a circle is equal, is all higher than or is equal to the diameter of steel ball (8)；The projection in the plane at urceolus (2) arbitrary shaft section place of the internal groove side wall of annular inner groove is also along laterally zygomorphic two the bad circular arcs of urceolus (2) axis, the two bad circular arc place diameter of a circle is equal, is all higher than or is equal to the diameter of steel ball (8)。
3. self-locking cabin door stay bar in the middle of as claimed in claim 1, it is characterised in that through hole being projected as in the plane at urceolus (2) arbitrary shaft section place is square, and this square length is more than or equal to the diameter of steel ball (8)；The internal groove side wall of ring-type water jacket in the plane at urceolus (2) arbitrary shaft section place be projected as along urceolus (2) axis laterally zygomorphic two trapezoidal, two trapezoidal bottoms are close to urceolus (2), and bottom more than or equal in circle with trapezoidal with the chord length corresponding to high arc, described circle and steel ball (8) equal diameters；The projection in the plane at urceolus (2) arbitrary shaft section place of the internal groove side wall of annular inner groove be also along urceolus (2) axis laterally zygomorphic two trapezoidal, two trapezoidal bottoms are close to urceolus (2), and bottom more than or equal in circle with trapezoidal with the chord length corresponding to high arc, described circle and steel ball (8) equal diameters。
4. the middle self-locking cabin door stay bar as described in claim 1 or 2 or 3, it is characterised in that also include solving lock tube (3) and back-up ring (4)；Back-up ring (4) is raised on the outer wall of urceolus (2), and spring (6) is fixedly linked each through back-up ring (4) and urceolus (2) outer wall away from one end of expansion link (11)；Solve the tubular that lock tube (3) is hollow, it is socketed in back-up ring (4), the outside of spring (6) and lining (9), it is fixed with one end of the close expansion link (11) of lining (9) near one end of expansion link (11) and is connected。
5. middle self-locking cabin door stay bar as claimed in claim 4, it is characterised in that also include solving the stopping means (16) that lock tube slides。
6. middle self-locking cabin door stay bar as claimed in claim 5, it is characterized in that also being fixedly provided with on the outer wall of described urceolus (2) stopping means (16), this stopping means (16) is than solving lock tube (3) further from expansion link (11)；Sliding into stopping means (16) place when solving lock tube (3), annular inner groove communicates with through hole。
7. middle self-locking cabin door stay bar as claimed in claim 4, it is characterised in that urceolus (2), expansion link (11), lining (9) is conciliate lock tube (3) and is cylindrical shape。
8. middle self-locking cabin door stay bar as claimed in claim 4, it is characterised in that through hole is provided with four。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310744666.3A CN103708023B (en) | 2013-12-31 | 2013-12-31 | Middle self-locking cabin door stay bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310744666.3A CN103708023B (en) | 2013-12-31 | 2013-12-31 | Middle self-locking cabin door stay bar |
Publications (2)
| Publication Number | Publication Date |
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| CN103708023A CN103708023A (en) | 2014-04-09 |
| CN103708023B true CN103708023B (en) | 2016-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310744666.3A Active CN103708023B (en) | 2013-12-31 | 2013-12-31 | Middle self-locking cabin door stay bar |
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| Country | Link |
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| CN (1) | CN103708023B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110712745B (en) * | 2019-10-23 | 2021-12-03 | 中航飞机起落架有限责任公司 | Bearable pull rod device |
| CN112623263A (en) * | 2020-12-23 | 2021-04-09 | 大连长丰实业总公司 | Special supporting device for aircraft canopy connecting lock |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3543603A (en) * | 1968-01-10 | 1970-12-01 | Rex Chainbelt Inc | Automatic quick release mechanism |
| US5593239A (en) * | 1994-04-28 | 1997-01-14 | Tracor, Inc. | Extendable support pole |
| CN2773375Y (en) * | 2005-02-01 | 2006-04-19 | 卢伟明 | Pellet-type lock-cover telescopic rod |
| CN202833427U (en) * | 2012-09-29 | 2013-03-27 | 江苏昌力油缸有限公司 | Lifting oil cylinder capable of being fastened |
| CN203638079U (en) * | 2013-12-31 | 2014-06-11 | 陕西中航气弹簧有限责任公司 | Middle self-locking type cabin door supporting rod |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996001064A1 (en) * | 1994-07-01 | 1996-01-18 | Tornare Francois | Adjustable-length walking stick |
-
2013
- 2013-12-31 CN CN201310744666.3A patent/CN103708023B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3543603A (en) * | 1968-01-10 | 1970-12-01 | Rex Chainbelt Inc | Automatic quick release mechanism |
| US5593239A (en) * | 1994-04-28 | 1997-01-14 | Tracor, Inc. | Extendable support pole |
| CN2773375Y (en) * | 2005-02-01 | 2006-04-19 | 卢伟明 | Pellet-type lock-cover telescopic rod |
| CN202833427U (en) * | 2012-09-29 | 2013-03-27 | 江苏昌力油缸有限公司 | Lifting oil cylinder capable of being fastened |
| CN203638079U (en) * | 2013-12-31 | 2014-06-11 | 陕西中航气弹簧有限责任公司 | Middle self-locking type cabin door supporting rod |
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| CN103708023A (en) | 2014-04-09 |
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