CN101886799A - Expansion bar - Google Patents
Expansion bar Download PDFInfo
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- CN101886799A CN101886799A CN2009101073259A CN200910107325A CN101886799A CN 101886799 A CN101886799 A CN 101886799A CN 2009101073259 A CN2009101073259 A CN 2009101073259A CN 200910107325 A CN200910107325 A CN 200910107325A CN 101886799 A CN101886799 A CN 101886799A
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- slide bar
- expansion link
- lock pin
- link according
- piston
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Abstract
The invention relates to an expansion bar, at least comprising a first slide bar and a second slide bar which are in sliding joint with each other, wherein the second slide bar is positioned on the upper part and is sleeved in the first slide bar. The expansion bar also comprises a nozzle, a clamping claw and a first locknut, wherein the lower part of the nozzle is fixed at the upper end of the first slide bar in a surrounding manner and the upper part thereof is provided with an external thread; the lower part of the clamping claw is arranged in the nozzle, and the upper part of the clamping claw, which is exposed out of the nozzle, is provided with a truncated cone-like peripheral surface and surrounds the second slide bar; and the first locknut is sleeved outside the clamping claw, the lower part of the first locknut is provided with an internal thread meshed with the external thread and the first locknut is provided with a truncated cone-like internal surface which extrudes the truncated cone-like peripheral surface and ensures the clamping claw to clasp the second slide bar. The expansion bar can maintain tight connection even on the oscillatory occasions to prevent rotation. Meanwhile, when accidentally falling down, the second slide bar can be cushioned, thus avoiding impact on the bottom. The lockpin component arranged on the expansion link can avoid detachment among the slide bars.
Description
Technical field
The present invention relates to a kind of expansion link.
Background technology
All need lighting is carried out descending operation in a lot of occasions at present, to adapt to the needs of on-the-spot illumination.This lighting all adopts expansion link usually, and luminescence component is fixed on an end of expansion link, regulates the flexible state of expansion link, can change the height of luminescence component.
The structure and the stretch mode of these expansion links have nothing in common with each other, and mainly are divided into mechanical type expansion link, fluid pressure type expansion link and vapour-pressure type expansion link.Wherein the fluid pressure type expansion link is relative simple with vapour-pressure type expansion link framework, but cost is higher.The structure of mechanical type expansion link is comparatively complicated, but cost is lower.
Currently used mechanical type expansion link especially multi-section type expansion link generally adopts more connector, makes syndeton very complicated.These expansion links adopt screw nut or latch structure, so that fix after elongation.Wherein the cooperation of screw nut occurs stripped thread easily, nibbles dead phenomenon, need carry out preservative treatment.Though and latch structure can solve the problem anti-rotation and location, latch comes off easily and ruptures, especially in the vibration occasion.In addition, stretch the restriction that the height that falls also can be subjected to locating height.
The mechanical type expansion link is commonly two-segment type, and this has brought restriction to collapsing length, and has the defective that can not bear larger side face power, seems more insecure in the vibration occasion.Expansion link in the process of lifting, fixing before, a pole wherein is easy to fall down, and the bottom is impacted, and may damage relevant assembly.When expansion link is assembled mutually with other assembly, install and fix the program complexity, safeguard inconvenience.
Summary of the invention
The technical problem to be solved in the present invention is, adopts latch to prevent the defective of rotating and locating, coming off easily and rupture at expansion link of the prior art, and a kind of expansion link is provided, even also can prevent rotation and location in the occasion of vibration.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of expansion link, comprise first slide bar and second slide bar that slidably connect at least, wherein second slide bar is positioned at top, and is set in first slide bar, and described expansion link also comprises:
The mouth of pipe, its underpart are around being fixed in described first slide bar upper end, and top is provided with external screw thread;
Adapter claw, bottom are arranged in the described mouth of pipe, are exposed to the outer top of the mouth of pipe and have the truncated cone-shaped outer peripheral face, and be surrounded on outside described second slide bar; And
First locking nut is set in outside the described adapter claw, and the bottom is provided with the internal thread with the engagement of described external screw thread, and has the described truncated cone-shaped outer peripheral face of extruding, makes described adapter claw hold the truncated cone-shaped inner peripheral surface of described second slide bar tightly.
According to expansion link of the present invention, on the described adapter claw, be provided with the groove that runs through its sidewall from the top to the bottom.
According to expansion link of the present invention, described adapter claw is made by rubber.
According to expansion link of the present invention, the outer peripheral face of described first locking nut is provided with a plurality of latches, the described mouth of pipe is provided with the fixture block device that can pivot, and described fixture block device comprises and cooperates the fixture block that makes its location with described latch and sway to change the handle of described fixture block position.
According to expansion link of the present invention, the bottom of described second slide bar is fixed with piston, and described piston extends in described first slide bar; The bottom lock of described first slide bar, described piston communicates with the external world by narrow gap with space between described first slide bar.
According to expansion link of the present invention, described piston is provided with centre bore, and described centre bore comprises a plurality of parts that diameter does not wait; Be provided with the gas pearl in described centre bore, described gas pearl is the lid shape of bottom opening, and the top contacts with the inwall of described piston, and the part that described centre bore is positioned at described gas pearl top communicates with the external world.
According to expansion link of the present invention, be provided with in the described centre bore and be used to the block that prevents that described gas pearl from deviating from, described block both ends open, and be fixedly installed on described gas pearl below.
According to expansion link of the present invention, the outer wall of described first slide bar is provided with the lock pin assembly, the outer peripheral face of described piston is provided with groove, and described lock pin assembly penetrates the outer wall of first slide bar along the axis direction perpendicular to described first slide bar, and telescopically extends in the described groove.
According to expansion link of the present invention, described lock pin assembly comprise the stop axle sleeve that is fixed on described first slide bar, be slidably disposed on lock pin and lock pin cap in the described stop axle sleeve, first end of described lock pin extends in the described groove, second end extends to outside described first slide bar and with described lock pin cap and is connected, between described stop axle sleeve and described lock pin, be provided with the flexible member of described lock pin to described piston direction pushing and pressing.
According to expansion link of the present invention, described expansion link top is provided with connector, and described connector comprises:
The top guide pillar is connected described expansion link tip exterior by internal thread, and tapering is all arranged at its outer peripheral face top;
Top lock pressure ring is used to connect light fixture, is set in outside the guide pillar of described top, and inner peripheral surface has tapering; And
Second locking nut is set in outside the lock pressure ring of described top, and is mated by screw thread, makes described top lock pressure ring hold described top guide pillar tightly.
According to expansion link of the present invention, described expansion link comprises three slide bars that slidably connect.
According to expansion link of the present invention, the bottom of described first slide bar is provided with crashproof rubber cushion.
Implement expansion link of the present invention, have following beneficial effect:, prevent rotation even expansion link of the present invention also can keep tight connection in the occasion of vibration.Simultaneously, when the second slide bar accident that is positioned at the top falls, can be cushioned, avoid the bottom is impacted.The set lock pin assembly of this expansion link can be avoided deviating between the slide bar.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the partial sectional view of expansion link among the present invention;
Fig. 2 is the cutaway view of the bottom of expansion link among the present invention;
Fig. 3 is the cutaway view at the top of expansion link among the present invention;
Fig. 4 is the cutaway view of piston among the present invention;
Fig. 5 is the cutaway view of the mouth of pipe among the present invention;
Fig. 6 is the schematic diagram of adapter claw;
Fig. 7 is the cutaway view of lock pin assembly among the present invention;
Fig. 8 is the cutaway view of the upper guide post of expansion link among the present invention;
Fig. 9 is the structural representation that expansion link of the present invention is applied to lighting;
Figure 10 is the partial sectional view of another enforcement of expansion link among the present invention.
The specific embodiment
The bottom lock of first slide bar 101, in illustrated embodiment, the bottom of first slide bar 101 is by slide bar cap 106 sealings of piston-shaped, and this slide bar cap 106 is provided with external screw thread, inside, first slide bar, 101 lower end is provided with internal thread, and slide bar cap 106 is fixed in the bottom of first slide bar 101 by screw thread.In first slide bar 101, above the slide bar cap 106, be provided with crashproof rubber cushion 107, this crashproof rubber cushion 107 is fixed on the slide bar cap 106 by screw 108.
In the bottom of second slide bar 102, be provided with piston 105.The top of this piston 105 is provided with external screw thread, is provided with internal thread in inside, second slide bar, 102 lower end.The top of piston 105 is fixed in second slide bar 102 by screw thread, and the lower end extends in first slide bar 101 and can slide therein.
In order to prevent that second slide bar 102 from not falling down before fixing, first slide bar, 101 bottoms are impacted, damage associated component, on piston 105, be provided with centre bore 109.As shown in Figure 4, this centre bore 109 comprises a plurality of parts that diameter is different: be positioned at the below the 109a of first, be positioned at the middle part second portion 109b and superposed third part 109c, wherein the 109a of first is used for fixing and holds link stopper 110.This link stopper 110 is the cylindric of both ends open, fixes by screw thread.Second portion 109b is used to hold gas pearl 111, and this gas pearl 111 is the lid shape of bottom opening, and its external diameter is greater than the internal diameter of link stopper 110, is therefore located by link stopper 110 and can not deviate from.When gas pearl 111 is arranged among the second portion 109b, between periphery and the second portion 109b a little gap is arranged.
The diameter of the third part 109c of centre bore 109 is less than the diameter of second portion 109b, and the top of gas pearl 111 is circular-arc, perhaps has circular arc portion, with the inwall of centre bore 109, the following end in contact of third part 109c just.The upper end open of third part 109c allows gas to pass through.Also can be as shown in the figure, the upper end of third part 109c has internal thread, the second crashproof rubber cushion 112 is fixed in the top of piston 105 by screw 113, this moment screw 113 with the internal thread engagement of third part 109c, with top seal.Meanwhile, third part 109c middle part is communicated with passage 114.Passage 114 is through to the outer peripheral face of piston 105.Those skilled in the art person can understand, and also can adopt other structure, and piston 105 is communicated with the external world by narrow gap with space between first slide bar 101.
When second slide bar 102 when accident falls before fixing, piston 105 will move downwards in first slide bar 101.Because the top of gas pearl 111 contacts with third part 109c, can only allow air slowly to pass through, therefore the air of first slide bar, 101 lower ends is compressed, and forms air cavity, these compressed air can apply air pressure upwards to second slide bar 102, make second slide bar 102 slowly fall.So can avoid second slide bar 102 to fall impact and the damage that causes fast.
Be provided with draw-in groove on the outer wall of the lower end of piston 105, be provided with damping ring 115 in it, this damping ring 115 plays sealing and lubrication, can prevent that compressed air from from the effusion of the gap between the piston 105 and first slide bar 101, stoping second slide bar 102 to fall fast.
When making that second slide bar 102 stretches out with respect to first slide bar 101, keep relative positioning between the two, first slide bar 101 is provided with the mouth of pipe 116.In conjunction with shown in Figure 5, this mouth of pipe 116 roughly is tubular, and its lower end is provided with internal thread, and lock onto first slide bar, 101 upper ends by this internal thread.The middle part of the mouth of pipe 116 is provided with the screw 117 that runs through its outer wall, and this screw 117 is perpendicular to the axis direction of the mouth of pipe 116.The mouth of pipe 116 upper end inwalls are provided with ring-type draw-in groove 118.
Outside the mouth of pipe 116 and adapter claw 119, also be arranged with first locking nut 121.This first locking nut 121 roughly is tubular, and lower inner wall has internal thread 137.Top at the mouth of pipe 116 is provided with external screw thread, and the bottom of first locking nut 121 is by being threaded in the top of the mouth of pipe 116, and the upper inside wall of first locking nut 121 tilts, and forms the truncated cone-shaped inner chamber.The tapering of this truncated cone-shaped inner chamber can be identical with the tapering of the round table-like outer peripheral face of adapter claw 119, but undersized.Like this, when both cooperated, the truncated cone-shaped inner chamber of first locking nut 121 can be oppressed the round table-like outer peripheral face of adapter claw 119.
After each assembly assembling finished, the bottom of the mouth of pipe 116 was set in outside first slide bar 101, and the mouth of pipe 116 tops are fixed in the bottom of adapter claw 119, and the bottom of first locking nut 121 is by being threaded in the mouth of pipe 116 tops.Adapter claw 119 is positioned at the mouth of pipe 116, the first locking nuts 121 and is positioned at outside the mouth of pipe 116, and adapter claw 119 and first locking nut 121 are toward each other.Second slide bar 102 by the top loop of adapter claw 119 around.
At this moment, adapter claw 119 is exposed to the outer truncated cone-shaped outer peripheral faces of the mouth of pipe 116 and matches with the truncated cone-shaped inner chamber on first locking nut, 121 tops.When being screwed down first locking nut 121, its inner chamber can be oppressed the round table-like outer peripheral face of adapter claw 119, makes adapter claw 119 distortion dwindle, thereby hugs second slide bar 102, makes that second slide bar 102 can not be with respect to 101 motions of first slide bar.When upwards unscrewing first locking nut 121, its inner chamber reduces the power of the round table-like outer peripheral face of adapter claw 119, and adapter claw 119 restores to the original state, and it is big that internal diameter becomes, and makes second slide bar 102 to move up and down with respect to first slide bar 101, thereby stretches out, indentation.That this structure can play is fixing, prevent the effect of rotating.
In this embodiment, adapter claw 119 preferably adopts elastomeric material, and adapter claw 119 is extruded distortion like this, with first locking nut 121 damping action is preferably arranged, when expansion link 100 was applied to vibration environment, the threaded engagement between first locking nut 121 and the mouth of pipe 116 can not become flexible yet.
With reference to Figure 10, when adapter claw 119 adopts the nonrubber material, a plurality of latches 130 can be set on the outer peripheral face of first locking nut 121.The mouth of pipe 116 is provided with the fixture block device 131 that can pivot.This fixture block device 131 comprises fixture block 132 that cooperates with latch 130 and the handle 133 that is connected as a single entity with fixture block 132, and when raising handle 133, fixture block 132 can not rotate the locking nut 121 of winning with respect to the mouth of pipe 116 between two latches 130.When depressing handle 133, fixture block 132 is thrown off, and first locking nut 121 is rotatable.Like this, even adapter claw 119 adopts materials such as plastics, metal, also can play the anti-rotation effect.Those skilled in the art person can understand, and also the vee gutter that cooperates with latch 130 can be set on fixture block 132, cooperates with latch 130, prevents to rotate.
In order to prevent that second slide bar 102 accident in the process of stretching out with respect to first slide bar 101 from deviating from, on first slide bar 101, also be provided with lock pin assembly 122.Outer peripheral face middle part at piston 105 is provided with groove 123, and this lock pin assembly 122 is fixed in the screw 117 along the direction perpendicular to first slide bar, 101 axis, penetrates the outer wall of first slide bar 101, and telescopically extends in this groove 123.
As shown in Figure 7, this lock pin assembly 122 comprises by screw thread and is fixed in the stop axle sleeve 124 on first slide bar 101 and is slidably disposed on lock pin 125 in the stop axle sleeve 124, first end of this lock pin 125 extends in the groove 123, second end passes the hole on the stop axle sleeve 124, extend to outside first slide bar 101, and fixedly connected with lock pin cap 134.The outer peripheral face of this lock pin 125 is step, is provided with the flexible member 126 of lock pin 125 perseverances being pushed to piston 105 between lock pin 125 and stop axle sleeve 124.This flexible member 126 can be spring or shell fragment, and an end installs on lock pin 125, and an end installs in stop axle sleeve 124.The diameter of lock pin cap 134 is greater than the diameter in the hole on the stop axle sleeve 124, and under the effect of flexible member 126, offset with stop axle sleeve 124, it plays two effects: can spur lock pin 125, prevent that simultaneously lock pin 125 is under the active force of flexible member in indentation first slide bar 101.
When pulling lock pin cap 124, lock pin 125 moves outside first slide bar 101, this moment, flexible member 126 was compressed, second slide bar 102 can be with respect to 101 indentations of first slide bar, when lock pin 125 with after groove 123 separates, cancel external force, this moment, lock pin 125 installed on the outer wall of second slide bar 102, can continue indentation.After being fully retracted, can be by 121 lockings of first locking nut.
When second slide bar 102 stretches out, unclamp first locking nut 121, spur second slide bar 102 and slide.This moment, lock pin 125 installed on the outer wall of second slide bar 102, when the groove on the piston 105 123 moves to the position of lock pin 125, lock pin 125 can stretch in the groove 123 under the restoring force effect of flexible member 126, because stopping of lock pin 125, second slide bar 102 can not continue motion, therefore can prevent from.By the width of groove 123 along piston 105 circumference is set, after second slide bar 102 stretches out, can prevent that also second slide bar 102 from rotating.
Except the latch assembly 122 that adopts this structure, can also adopt directly perforate on first slide bar 101, and latch assembly 122 adopts common latch, it cooperates with groove 123, needs this moment operating personnel to observe the relative position of groove 123.When second slide bar 102 reaches preposition, promptly adopt latch to fix.
In the embodiment shown in fig. 1, between second slide bar 102 and the 3rd slide bar 103 be connected similar.Do not repeat them here.The bottom of expansion link 100 is fixed on the installing device, there is shown the example that adopts anchor ear 135 that expansion link 100 is fixed, and also can adopt other connector, for example sleeve, bolt etc.
Be provided with the connector that is used to connect lighting on the top of expansion link 100, in conjunction with Fig. 1, Fig. 3 and Fig. 8, this connector comprises top guide pillar 127, top lock pressure ring 128 and second locking nut 129.The bottom hollow of top guide pillar 127 wherein, and be connected the top of expansion link 100 by internal thread.The outer peripheral face top of top guide pillar 127 has tapering.Top lock pressure ring 128 is set in outside the top guide pillar 127, and inner peripheral surface has corresponding tapering.Second locking nut 129 is set in outside the lock pressure ring 128 of top, by being threaded.
Top lock pressure ring 128 needs the device of lifting to be connected with lighting or other.Identical with the principle of the round table-like outer peripheral face of the truncated cone-shaped inner chamber of above-described first locking nut 121 compressing adapter claw 119, when second locking nut 129 is tightened with top lock pressure ring 128, will make top lock pressure ring 128 hold top guide pillar 127 tightly, thereby need the device of lifting to be connected the top of expansion link 100 lighting or other.
Fig. 9 shows the schematic diagram that expansion link 100 is applied to lighting.This expansion link 100 is connected with the light fixture 201 of lighting apparatus 200, and the lower end is installed on the generator stand 203 with anchor ear, thereby regulates the height of light fixture 201 as required, realizes illumination on a large scale.
Certain expansion link of the present invention 100 not only can be used on the lighting apparatus, also can be applicable on other occasions or device that lifting, flexible operation need be arranged.
Even expansion link 100 of the present invention also can keep tight connection in the occasion of vibration, prevent rotation.Simultaneously, when second slide bar, 102 accidents that are positioned at the top fall, can be cushioned, avoid the bottom is impacted.These expansion link 100 set lock pin assemblies can be avoided deviating between the slide bar.
Claims (12)
1. an expansion link comprises first slide bar and second slide bar that slidably connect at least, and wherein second slide bar is positioned at top, and is set in first slide bar, it is characterized in that, described expansion link also comprises:
The mouth of pipe, its underpart are around being fixed in described first slide bar upper end, and top is provided with external screw thread;
Adapter claw, bottom are arranged in the described mouth of pipe, are exposed to the outer top of the mouth of pipe and have the truncated cone-shaped outer peripheral face, and be surrounded on outside described second slide bar; And
First locking nut is set in outside the described adapter claw, and the bottom is provided with the internal thread with the engagement of described external screw thread, and has the described truncated cone-shaped outer peripheral face of extruding, makes described adapter claw hold the truncated cone-shaped inner peripheral surface of described second slide bar tightly.
2. expansion link according to claim 1 is characterized in that, on the described adapter claw, is provided with the groove that runs through its sidewall from the top to the bottom.
3. expansion link according to claim 1 is characterized in that described adapter claw is made by rubber.
4. expansion link according to claim 1, it is characterized in that, the outer peripheral face of described first locking nut is provided with a plurality of latches, the described mouth of pipe is provided with the fixture block device that can pivot, and described fixture block device comprises and cooperates the fixture block that makes its location with described latch and sway to change the handle of described fixture block position.
5. expansion link according to claim 1 is characterized in that the bottom of described second slide bar is fixed with piston, and described piston extends in described first slide bar; The bottom lock of described first slide bar, described piston communicates with the external world by narrow gap with space between described first slide bar.
6. expansion link according to claim 5 is characterized in that described piston is provided with centre bore, and described centre bore comprises a plurality of parts that diameter does not wait; Be provided with the gas pearl in described centre bore, described gas pearl is the lid shape of bottom opening, and the top contacts with the inwall of described piston, and the part that described centre bore is positioned at described gas pearl top communicates with the external world.
7. expansion link according to claim 6 is characterized in that, is provided with in the described centre bore to be used to the block that prevents that described gas pearl from deviating from, and described block both ends open, and be fixedly installed on described gas pearl below.
8. expansion link according to claim 5, it is characterized in that, the outer wall of described first slide bar is provided with the lock pin assembly, the outer peripheral face of described piston is provided with groove, described lock pin assembly penetrates the outer wall of first slide bar along the axis direction perpendicular to described first slide bar, and telescopically extends in the described groove.
9. expansion link according to claim 8, it is characterized in that, described lock pin assembly comprises the stop axle sleeve that is fixed on described first slide bar, is slidably disposed on lock pin and lock pin cap in the described stop axle sleeve, first end of described lock pin extends in the described groove, second end extends to outside described first slide bar and with described lock pin cap and is connected, between described stop axle sleeve and described lock pin, be provided with the flexible member of described lock pin to described piston direction pushing and pressing.
10. expansion link according to claim 9 is characterized in that, described expansion link top is provided with connector, and described connector comprises:
The top guide pillar is connected described expansion link tip exterior by internal thread, and tapering is all arranged at its outer peripheral face top;
Top lock pressure ring is used to connect light fixture, is set in outside the guide pillar of described top, and inner peripheral surface has tapering; And
Second locking nut is set in outside the lock pressure ring of described top, and is mated by screw thread, makes described top lock pressure ring hold described top guide pillar tightly.
11. expansion link according to claim 1 is characterized in that, described expansion link comprises three slide bars that slidably connect.
12. expansion link according to claim 5, the bottom of described first slide bar is provided with crashproof rubber cushion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101073259A CN101886799B (en) | 2009-05-13 | 2009-05-13 | Expansion bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101073259A CN101886799B (en) | 2009-05-13 | 2009-05-13 | Expansion bar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101886799A true CN101886799A (en) | 2010-11-17 |
| CN101886799B CN101886799B (en) | 2012-01-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101073259A Expired - Fee Related CN101886799B (en) | 2009-05-13 | 2009-05-13 | Expansion bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101886799B (en) |
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| CN102295071A (en) * | 2011-06-30 | 2011-12-28 | 北京航空航天大学 | Telescopic truss structure and manufacturing method thereof |
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| CN103134016A (en) * | 2011-11-24 | 2013-06-05 | 海洋王照明科技股份有限公司 | Telescopic rod and lamp comprising the same |
| CN103134016B (en) * | 2011-11-24 | 2016-09-14 | 海洋王照明科技股份有限公司 | Expansion link and there is the light fixture of this expansion link |
| CN104456467A (en) * | 2013-09-16 | 2015-03-25 | 深圳市海洋王照明工程有限公司 | Lifting bar structure for lamps and projection lamp with same |
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