CN209939005U - Can repeat and take up and expand extension mechanism - Google Patents
Can repeat and take up and expand extension mechanism Download PDFInfo
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- CN209939005U CN209939005U CN201920248874.7U CN201920248874U CN209939005U CN 209939005 U CN209939005 U CN 209939005U CN 201920248874 U CN201920248874 U CN 201920248874U CN 209939005 U CN209939005 U CN 209939005U
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Abstract
The utility model discloses a can repeatedly receive and expand extension mechanism, including outer cover part, first outer locking part, receive and expand locking part and slip unlocking piece. The folding and unfolding locking component can realize synchronous extension and gradual folding under the action of a medium source, and the movement is more stable; furthermore, the locking relationship between the second deployment locking member and the outer telescoping member, and the locking relationship between adjacent deployment locking members, are unlockable so that the deployment mechanism can be reused.
Description
Technical Field
The utility model relates to a spacecraft ground landing leg, in particular to can repeatedly receive and expand extension mechanism.
Background
The lander will bear great impact load at the landing moment, so a landing buffer device needs to be designed to realize soft landing of the lander on the surface of the planet. Leg landing bumpers are currently in widespread use, such as the Apollo manned landing gear in the united states, Luna 16 in the former soviet union, "Hiten" in japan, and EuroMoon 2000 for the planned launch in the european space agency, all of which employ leg landing bumpers.
With the development of aerospace technology and the increasingly refined and complicated SPACE operation tasks, new functions and higher performance requirements are put forward for landing leg mechanisms, for example, the technology of recycling and reusing the soft ground of a first-level stage of a carrier rocket realized by SPACE X requires that the landing legs have the characteristics of high bearing capacity, high reliability, high unfolding speed, reusability and the like. The traditional landing leg is usually not reusable, and the structure is complicated, the bearing capacity is low, or the landing leg needs to be manually unlocked after being unfolded, and automatic repeated unfolding and folding cannot be realized.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problem, the technical scheme of the utility model is that:
a re-deployable extension mechanism, comprising:
an outer sleeved component connected with an external medium source;
a first outer locking member having a bottom end fixed to a top end of the outer telescoping member;
the folding and unfolding locking component defines the folding and unfolding locking component at the topmost end as a first folding and unfolding locking component and defines the folding and unfolding locking component at the bottommost end as a second folding and unfolding locking component; the adjacent folding and unfolding locking parts are nested and connected step by step, and when the folding and unfolding locking parts are extended, the upper folding and unfolding locking part can be locked with the adjacent folding and unfolding locking parts when sliding to the top ends of the adjacent folding and unfolding locking parts; when the folding and unfolding locking component is folded, the folding and unfolding locking component slides reversely, and the next-stage folding and unfolding locking component is unlocked in the sliding process, so that the next-stage folding and unfolding locking component can be folded under the action of a medium source; the second retractable locking member is slidably connected with the outer telescoping member and is lockable with the first outer locking member when sliding thereon; the top end of the first folding and unfolding locking component is connected with the medium source; and the number of the first and second groups,
and the sliding unlocking piece is nested in the first folding and unfolding locking part and is connected with the first folding and unfolding locking part in a sliding way.
Preferably, the deployment locking member comprises:
an intermediate socket;
the inner locking piece is fixedly connected to the bottom end of the middle sleeve-joint piece and is in sliding connection with the middle sleeve-joint piece of the next-stage folding and unfolding locking part; the inner locking piece of the second folding and unfolding locking component is connected with the outer sleeved component in a sliding mode and is locked with the first outer locking piece after being unfolded completely;
the bottom end of the second external locking piece is fixed at the top end of the middle sleeve joint piece;
a self-locking mechanism mounted on the inner locking member for locking the inner locking member to the outer locking member;
the deployment locking member in addition to the first deployment locking member further comprises:
and the fixed unlocking piece is fixedly connected to the inner locking piece and used for unlocking the next-stage folding and unfolding locking component.
Preferably, the self-locking mechanism includes:
the swing rod is rotatably connected to the bracket arranged on the inner locking piece through a rotating shaft, and the bottom end surface of the swing rod, the first outer locking piece and the second outer locking piece form a friction self-locking condition; when unlocking, the fixed unlocking piece or the sliding unlocking piece drives the top end of the swing rod to enable the bottom of the swing rod to rotate so as to be separated from the first external locking piece or the second external locking piece;
the torsion spring is sleeved on the rotating shaft, and two extending arms of the torsion spring are respectively connected with the inner locking piece and the oscillating bar;
and the roller is rotatably arranged at the bottom of the oscillating bar, and in a furled state, the roller is mutually extruded with the outer sleeved part or the middle sleeved part of the upper-stage furling and unfolding locking part under the action of the torsion spring.
Preferably, the inner wall of the first external locking piece and the inner wall of the second external locking piece both comprise locking grooves, and when the swing rod is stretched, the swing rod rotates under the action of the torsion spring, so that the end face of the bottom of the swing rod and the locking grooves are subjected to friction self-locking.
Preferably, the outer sheathing member includes:
the outer sleeve connecting piece is embedded with a second folding and unfolding locking component, and the top end of the outer sleeve connecting piece is connected with a first outer locking piece; and the end cover is arranged at the bottom end of the outer sleeve connecting piece, and is provided with an inlet/outlet.
Preferably, the inner locking member includes:
the first cylindrical section is in dynamic sealing connection with the outer sleeved part or the next-stage middle sleeved part, and a mounting hole for fixing the self-locking mechanism is formed in the first cylindrical section;
the first circular table surface section is connected to the top end of the first cylindrical section, the outer surface of the first circular table surface section is a circular table surface, and the inner surfaces of the first external locking piece and the second external locking piece are provided with surfaces matched with the first circular table surface section; and the number of the first and second groups,
and the thread section is connected to the top end of the first circular table surface section and is used for connecting an intermediate sleeve piece.
Preferably, a plurality of annular grooves are formed in the bottom end of the first cylindrical section and used for placing the sliding ring and the dynamic sealing ring respectively.
Preferably, the structure of the first external locking member and the structure of the second external locking member both include:
the bottom end of the second cylindrical section is connected with the outer sleeved part or the middle sleeved part, and the inner wall of the second cylindrical section is provided with a self-locking structure formed by the self-locking mechanism;
the third cylindrical section is in dynamic sealing connection with the middle sleeve connector of the previous stage; and
and the second circular table surface section is positioned between the second cylindrical section and the third cylindrical section, and the inner surface of the second circular table surface section is a conical surface and used for limiting the inner locking piece.
Preferably, a plurality of annular grooves are formed in the inner wall of the third cylindrical section and are used for placing the sliding ring and the dynamic sealing ring respectively.
Compared with the prior art, the beneficial effects of the utility model are that:
1. in one embodiment, the folding and unfolding locking component can synchronously extend and gradually fold under the action of the medium source, and the movement is more stable. Furthermore, the locking relationship between the second deployment locking member and the outer telescoping member, and the locking relationship between adjacent deployment locking members, are unlockable, and therefore the deployment mechanism can be reused.
2. In the folding and unfolding locking part, the inner locking part can drive the middle sleeve of the same stage to slide relative to the middle sleeve of the next stage or the outer sleeved part, so that the stretching is realized; the folding and unfolding locking part of each stage can automatically unlock the self-locking mechanism of the next stage in the folding process, so that automatic folding is realized, manual unlocking is not needed, manual labor is simplified, and the accuracy of the stretching mechanism is improved.
3. In the self-locking mechanism, under the action of the torsion spring, the bottom end of the oscillating bar has a movement trend of rotating outwards in a folding state, when the end part of the oscillating bar slides to the first outer locking piece or the second outer locking part, the oscillating bar and the first outer locking piece/the second outer locking piece can realize friction self-locking, so that the inner locking piece and the first outer locking piece/the second outer locking piece are locked.
4. The first outer locking piece and the second outer locking piece are provided with locking grooves, and the bottom end of the swing rod can be automatically contacted with the locking grooves and frictionally locked under the action of the torsion spring, so that the axial movement between the inner locking piece and the first outer locking piece/the second outer locking piece is prevented.
5. In one embodiment, the medium source is preferably a gas medium, namely, the embodiment can combine a pneumatic expansion type locking mode based on the self-locking of the swing rod with a sliding sleeve, so that all stages of folding and unfolding locking parts can be synchronously expanded, and the expansion efficiency is higher.
6. In one embodiment, the sliding unlocking piece unlocks the first folding and unfolding locking component under the action of the air source, the first folding and unfolding locking component automatically unlocks the next folding and unfolding locking component in the folding process (through the fixed unlocking piece), and by analogy, the folding and unfolding locking components are folded step by step, so that the operation is more stable.
Drawings
FIG. 1 is a schematic view of a retractable mechanism for repeatedly retracting and extending;
FIG. 2 is a schematic view of the extendable and retractable mechanism in an extended state;
FIG. 3 is an enlarged view of portion A of FIG. 2;
FIG. 4 is a schematic view of a self-locking mechanism;
FIG. 5 is a schematic view of the inner locking member;
FIG. 6 is a schematic view of the outer locking member;
FIG. 7 is a schematic view of the outer locking member.
The locking device comprises an end cover 1, an outer sleeve connector 2, a first outer locking piece 3, an interface flange 4, a fixed unlocking piece 5, a torsion spring 6, a swing rod 7, a swing rod 701, a bottom end face 8, a support 9, a movable sealing ring 10, a sliding ring 11, an inner locking piece 1101, a first cylindrical section 1102, a first circular table surface section 1103, a threaded section 1103, an annular groove 1104, an inlet/outlet 12, an intermediate sleeve connector 13, a second outer locking piece 14, a second cylindrical section 1401, a second circular table surface section 1402, a third cylindrical section 1403, a locking hole 1404, a sliding unlocking piece 15, a rotating shaft 16 and a roller 17.
Detailed Description
The following detailed description is to be read in connection with the drawings and the detailed description.
The folding and unfolding locking unit at the topmost end is defined as a first folding and unfolding locking unit, and the folding and unfolding locking unit at the lowest end is defined as a second folding and unfolding locking unit.
Example 1
Referring to fig. 1-7, a re-deployable extension mechanism includes an outer telescoping member, a first outer locking member, a deployment locking member, and a sliding unlocking member 15. Wherein the outer sleeved component is connected with an external medium source; the adjacent folding and unfolding locking parts are nested and connected step by step, and when the folding and unfolding locking parts are unfolded, the upper folding and unfolding locking part can be locked with the adjacent folding and unfolding locking part when the upper folding and unfolding locking part slides to the top end of the adjacent fighting part; when the folding and unfolding locking component is folded, the folding and unfolding locking component slides reversely, and the next-stage folding and unfolding locking component is unlocked in the sliding process, so that the next-stage folding and unfolding locking component can be folded under the action of a medium source; the second collapsible locking member is slidably connected to the outer telescoping member and is lockable thereto when slid onto the first outer locking member 3; the top end of the first deployment locking member is connected to the media source. The slide release 15 is nested in the first collapsible locking member and is slidably connected thereto.
Specifically, the bottom end of the outer sleeved part is connected with an external medium source, and the outer sleeved part is communicated with the medium source in the stretching and furling processes. In the stretching process, the outer sleeved component guides the sliding of the second folding and unfolding locking component, so that the stretching of the second folding and unfolding locking component is realized; during the furling process, each stage of the furling locking component and the inner telescoping component are partially furled in the outer telescoping component, namely the outer telescoping component also serves as the protection of other components. Structurally, the outer sleeved part can adopt a hollow annular structure, such as a triangular ring structure, a circular ring structure, a square ring structure and the like.
The first outer locking member 3 is used for locking the second collapsible locking mechanism, and the bottom end of the first outer locking member is fixed to the top end of the outer telescoping member, and the specific structure is as follows: the top of outer cover connecting part forms the bellying along radial outside extension, is equipped with the through-hole on the bellying, is equipped with the screw hole on the first outer locking piece 3 to pass through the fastener with first locking piece and connect on the bellying. The first outer locking member 3 may be an annular structure with the outer sleeved member, such as a cylindrical structure with a triangular ring-shaped cross section, a circular ring-shaped cross section, a square ring-shaped cross section, etc., but it is within the scope of the present embodiment that the first outer locking member 3 is a non-annular structure uniformly distributed on the outer sleeved member.
The extension mechanism has a plurality of receipts exhibition locking part, and receipts exhibition locking part self has the function that slides and extend, and adjacent receipts exhibition locking part can realize the function of locking each other and unblock, and wherein, the locking and the phase-locking of two receipts exhibition locking part that are located top and bottom are special, and first receipts exhibition locking part unlocks through sliding unlocking piece 15, and second receipts exhibition locking part locks through first outer locking piece 3.
During expansion, the media source enters from the outer telescoping member and the second collapsible locking member slidably expands along the outer telescoping member under the urging of the media source such that the collapsible locking members synchronously expand.
In the furling process, the inner connecting part unlocks the first furling and unfolding locking part under the action of the medium source, the first furling and unfolding locking part slides and resets in the furling and unfolding locking part at the lower part of the first furling and unfolding locking part, the furling and unfolding locking part at the lower part is unlocked in the sliding process, and then the furling and unfolding locking part at the lower part can furl under the action of the medium source.
Through these receipts exhibition locking part, the extension mechanism that this embodiment provided can realize synchronous extension and draw in step by step under the effect of medium source, and the motion is more stable. Furthermore, the locking relationship between the second deployment locking member and the outer telescoping member, and the locking relationship between adjacent deployment locking members, are unlockable, and therefore the deployment mechanism can be reused.
The sliding locking piece is arranged in the first folding and unfolding locking part, and when the sliding locking piece is unfolded, the sliding locking piece slides to the top of the first folding and unfolding locking part under the action of a medium; when the folding device is folded, the first folding and unfolding locking component is communicated with the medium source, the sliding locking component reversely slides in the first folding and unfolding locking component under the pushing of the medium, when the sliding locking component slides to the lower part of the first folding and unfolding locking component, the sliding locking component unlocks the first folding and unfolding locking component, so that the first folding and unfolding locking component and the next-stage folding and unfolding locking component are unlocked, and then the first folding and unfolding locking component can slide along the next-stage folding and unfolding locking component.
The medium source can be a gaseous medium, such as compressed gas, or a liquid medium, such as hydraulic oil, but the present embodiment is preferably a gaseous medium, in other words, the present embodiment is a retractable and extendable mechanism based on pneumatic principle.
Example 2
The embodiment is further optimized on the basis of the previous embodiment.
With continued reference to fig. 1-7, the deployment locking feature includes an intermediate sleeve 13, an inner locking member 11, a self-locking mechanism, and a second outer locking member 14. The inner locking piece 11 is fixedly connected to the bottom end of the middle sleeve piece 13 and is in sliding connection with the middle sleeve piece 13 of the upper-stage folding and unfolding locking part; the inner locking element 11 of the second collapsible locking member is slidably connected to the outer telescoping member and locks with the first outer locking element 3 after full deployment. The bottom end of the second outer locking member 14 is fixed to the top end of the intermediate sleeve member 13 for locking the inner locking member 11 of the next stage of the collapsible locking member.
The deployment locking means other than the second deployment locking means comprise a fixed unlocking means 5, which is fixedly attached to the inner locking means 11 for unlocking the next level of deployment locking means.
Specifically, the intermediate sleeve 13 is a hollow structure, and may be an annular structure, and the bottom end thereof may be fixedly connected to the inner locking member 11 by a threaded connection or other connection means. The top end of the middle sleeve of the first folding and unfolding locking component is closed, wherein the closed position means that the top end of the middle sleeve is provided with an interface flange 4 or an end cover 1 and the like, and the interface flange 4 or the end cover 1 is provided with an inlet/outlet 12 connected with a medium source.
The inner locking member 11 is also a hollow structure, the inner locking member 11 may have a baffle plate (a through hole may be formed on the baffle plate), the top end has an open structure, the open end thereof may be fixed on the intermediate sleeve member 13, the other portion thereof extends out of the intermediate sleeve member 13, and the inner locking member 11 may be connected at the bottom end thereof to the outer sleeve member or the intermediate sleeve member 13 of the previous stage. When extended and retracted, the media source pushes on the inner locking member 11, thereby bringing the intermediate sleeve member together.
The second outer locking member 14 may adopt the same structure as the first outer locking member 3. The bottom end of the second outer locking member 14 is fixed to the intermediate sleeve member 13.
The self-locking mechanisms are uniformly arranged along the circumferential direction of the inner locking piece 11. After the inner locking member 11 moves to a preset position on the first outer locking member 3 or the second outer locking member 14, the self-locking mechanism acts to lock the two members so that the two members cannot move relatively. During the folding process, the sliding unlocking piece 15 or the fixed unlocking piece 5 pushes the self-locking mechanism, so that the inner locking piece 11 is unlocked from the first outer locking piece 3 or the second outer locking piece 14.
The fixed unlocking part is used for unlocking the automatic locking mechanism at the next stage, and in consideration of the fact that the second folding and unfolding locking part is the bottommost first-battle part, in order to save space, the fixed unlocking part 5 is not arranged on the inner locking part 11 of the folding and unfolding locking part.
Example 3
This example was further optimized on the basis of example 2.
Referring to fig. 1-4, the self-locking mechanism includes a swing link 7, a torsion spring 6 and a roller 17. The swing rod 7 is rotatably connected to a bracket 8 arranged on the inner locking piece 11 through a rotating shaft 16, and the bottom end surface of the swing rod, the first outer locking piece 3 and the second outer locking piece 14 form a friction self-locking condition; when unlocking, the fixed unlocking piece 5 or the sliding unlocking piece 15 drives the top end of the swing rod 7, so that the bottom end of the swing rod 7 rotates to be separated from the first external locking piece 3 or the second external locking piece 14. The torsion spring 6 is sleeved on the rotating shaft 16, and two extending arms of the torsion spring are respectively connected with the inner locking piece 11 and the swing rod 7. The roller 17 is rotatably arranged at the bottom of the swing rod 7; in the furled state, the roller 17 is pressed against the outer telescoping member or the intermediate telescoping member 13 of the upper telescoping locking member by the torsion spring 6.
Specifically, the inner locking member 11 is provided with a locking hole 1404 for providing an operation space for the self-locking mechanism, and the locking hole 1404 may be slightly larger for facilitating installation and adjustment of the components such as the bracket 8 and the swing link 7. The brackets 8 are disposed in one-to-one correspondence with the locking holes 1404, and the brackets 8 are fixed to the inner wall of the inner locking member 11, for mounting the swing link 7 on the inner locking member 11, so as to satisfy a space required for the operation of the swing link 7. The oscillating bar 7 can adopt a structure as shown in fig. 4, and the end surface 701 at the bottom end of the oscillating bar 7 is a specially processed conical surface for forming friction self-locking with the outer sleeved part or the middle sleeved part 13. The upper middle position of the swing rod 7 is rotatably connected with the bracket 8 through a rotating shaft 16, and when the top of the swing rod 7 is rotated, the bottom of the swing rod 7 can rotate reversely. The torsion springs 6 are installed on the rotating shaft 16, preferably at both ends of the rotating shaft 16, and the swing link 7 is located between the two torsion springs 6, so that the swing link 7 operates more stably. The torsion spring 6 provides the bottom end of the rocker 7 in the closed state and in the extended state with a tendency to rotate outwards through the locking opening 1404, which tendency is balanced by the roller 17 against the intermediate sleeve part 13 or the outer sleeve part, so that sliding friction between the rocker 7 directly and the outer sleeve part or the intermediate sleeve part 13 is avoided.
In addition, on the basis of this embodiment, the above-mentioned fixed unlocking piece 5 may adopt a tubular structure, and the outer wall of the bottom end of the fixed unlocking piece 5 is a conical surface structure, so that it cuts into the top end of the swing link 7 in the folding process, and then pushes the top end of the swing link 7 through the outer wall of the section of conical surface, so that the bottom end of the swing link 7 overcomes the acting force of the torsion spring 6 to rotate, thereby disengaging from the first external locking piece 3 or the second external locking piece 14.
Example 4
This example was further optimized on the basis of example 3.
Referring to fig. 5-6, the inner wall of the first external locking member 3 and the inner wall of the second external locking member 14 both include locking grooves, and when extended, the swing link 7 rotates under the action of the torsion spring 6, so that the bottom end surface of the swing link 7 and the locking grooves are self-locked by friction.
Specifically, the first outer locking member 3 and the second outer locking member 14 may adopt a self-locking structure of the same direction. The locking groove is a structure which is concave relative to the inner wall of the first external locking piece 3 and the inner wall of the second external locking piece 14, an inclined transition surface is arranged between the inner wall and the bottom surface of the locking groove, and the transition surface can be a surface which is matched with the conical surface at the end part of the swing rod 7 to form friction self-locking.
Example 5
The embodiment is further optimized on the basis of any one of the embodiments.
Referring to fig. 1-2, the external sleeved component includes an external sleeved member 2 and an end cover 1, wherein the external sleeved member 2 is embedded with a second retractable locking component, and the top end of the external sleeved member 2 is connected to a first external locking member 3, and the end cover 1 is disposed at the bottom end of the external sleeved member 2 and provided with an inlet/outlet 12.
Specifically, the outer telescoping member may have an annular structure, such as a cylindrical structure with openings at both ends, a hollow polyhedral cylindrical structure, or the like. The bottom end of the outer telescoping member is fitted with an end cap 1, preferably in sealed connection, the end cap 1 being adapted to receive the spacecraft and the deployment mechanism. An inlet/outlet port 12 in the end cap 1 is provided to communicate the stretching mechanism with the medium source.
Example 6
The embodiment is further optimized on the basis of any one of the embodiments.
Referring to fig. 5-6, the inner locking member 11 includes a first cylindrical section 1101, a first circular table section 1102 and a threaded section 1103. The first cylindrical section 1101 is in dynamic sealing connection with an outer sleeved part or a next-stage middle sleeved part 13, and a mounting hole for fixing the self-locking mechanism is formed in the first cylindrical section 1101; the first circular table surface section 1102 is connected to the top end of the first cylindrical section 1101, the outer surface of the first circular table surface section is a circular table surface, and the inner surface of the first outer locking piece 3 is arranged on a surface matched with the first circular table surface section 1102; a threaded section 1103 is connected to the top end of the first table top section 1102 for connection to the intermediate sleeve 13.
Specifically, the outer surface of the first cylindrical section 1101 is slidably connected to the outer telescoping member or the next stage of intermediate telescoping member 13 and is sealingly connected to control the tightness of the media source during the expansion and contraction process. The bottom cross-sectional dimension of the first table top section 1102 is larger than the top cross-sectional dimension and the first outer locking member 3 or the second outer locking member 14 will restrain the first table top section 1102. The threaded segment 1103 has threads on its outer wall for engaging an intermediate socket in the same deploying and retracting locking member to allow the two to move together.
Example 7
This example was further optimized on the basis of example 6.
Referring to fig. 5-6, the bottom end of the first cylindrical section 1101 is provided with a plurality of annular grooves 1104 for respectively accommodating the slip ring 10 and the dynamic seal ring 9.
Specifically, the outer wall of the first cylindrical section 1101 is provided with at least two annular grooves 1104, wherein at least one of the grooves is provided with the slip ring 10, and during sliding, the slip ring 10 plays a role of radial support, which may be made of teflon material, so as to reduce frictional resistance. In addition, a dynamic sealing ring 9 is arranged in at least one groove for sealing between the inner locking element 11 and the first/second outer locking element 3/14.
Example 8
This example was further optimized on the basis of any of examples 2 to 7.
Referring to fig. 1-3 and 7, the first outer locking member 3 and the second outer locking member 14 have the same structure, and each of them includes a second cylinder section 1401, a third cylinder section 1403 and a second circular table section 1402. The bottom end of the second cylindrical section 1401 is connected with the outer sleeved part or the middle sleeved part, and the inner wall of the second cylindrical section is provided with a self-locking structure formed by the self-locking mechanism; the third cylindrical section 1403 is in dynamic sealing connection with the middle sleeve connector 13 at the previous stage; the second circular table top section 1402 is located between the second cylindrical section 1401 and the third cylindrical section 1403, and the inner surface of the second circular table top section 1402 is a conical surface for limiting the inner locking member 11.
Specifically, a threaded hole is formed in the end face 701 of the bottom end of the second cylindrical section 1401, and the threaded hole is in threaded connection with the top end of the outer sleeve connector 2 or the middle sleeve connector 13 through a fastener. The locking grooves referred to in the above embodiments may be mounted on the second cylindrical section 1401. The inner wall of the third cylindrical section 1403 is hermetically connected with the middle sleeve connector 13 at the previous stage to ensure the air tightness in the extension and retraction processes. The second table top section 1402 axially limits the inner locking member 11.
Example 9
This example was further optimized on the basis of example 8.
Referring to fig. 7, a plurality of annular grooves 1104 are disposed on an inner wall of the third cylindrical section 1403, and are used for placing the slip ring 10 and the dynamic seal ring 9, respectively.
Specifically, at least three annular grooves 1104 are formed on the inner wall of the third cylindrical section 1403, wherein at least one of the grooves is provided with the slip ring 10, and during sliding, the slip ring 10 plays a role of radial support, which may be made of teflon material, to reduce frictional resistance. In addition, a dynamic sealing ring 9 is arranged in at least one groove for sealing between the inner locking element 11 and the first/second outer locking element 3/14.
The above disclosure is only for the part of the specific embodiments of the present application, but the present application is not limited thereto, and any variations that can be considered by those skilled in the art are intended to fall within the scope of the present application.
Claims (9)
1. A re-deployable extension mechanism, comprising:
an outer sleeved component connected with an external medium source;
a first outer locking member having a bottom end fixed to a top end of the outer telescoping member;
the folding and unfolding locking component defines the folding and unfolding locking component at the topmost end as a first folding and unfolding locking component and defines the folding and unfolding locking component at the bottommost end as a second folding and unfolding locking component; the adjacent folding and unfolding locking parts are nested and connected step by step, and when the folding and unfolding locking parts are extended, the upper folding and unfolding locking part can be locked with the adjacent folding and unfolding locking parts when sliding to the top ends of the adjacent folding and unfolding locking parts; when the folding and unfolding locking component is folded, the folding and unfolding locking component slides reversely, and the next-stage folding and unfolding locking component is unlocked in the sliding process, so that the next-stage folding and unfolding locking component can be folded under the action of a medium source; the second retractable locking member is slidably connected with the outer telescoping member and is lockable with the first outer locking member when sliding thereon; the top end of the first folding and unfolding locking component is connected with the medium source; and the number of the first and second groups,
and the sliding unlocking piece is nested in the first folding and unfolding locking part and is connected with the first folding and unfolding locking part in a sliding way.
2. The extension mechanism of claim 1, wherein the stow and lock member comprises:
an intermediate socket;
the inner locking piece is fixedly connected to the bottom end of the middle sleeve-joint piece and is in sliding connection with the middle sleeve-joint piece of the next-stage folding and unfolding locking part; the inner locking piece of the second folding and unfolding locking component is connected with the outer sleeved component in a sliding mode and is locked with the first outer locking piece after being unfolded completely;
the bottom end of the second external locking piece is fixed at the top end of the middle sleeve joint piece;
a self-locking mechanism mounted on the inner locking member for locking the inner locking member to the outer locking member;
the deployment locking member in addition to the second deployment locking member further comprises:
and the fixed unlocking piece is fixedly connected to the inner locking piece and used for unlocking the next-stage folding and unfolding locking component.
3. The extension mechanism of claim 2, wherein the inner locking member has a locking hole formed therein, the self-locking mechanism comprising:
the swing rod is rotatably connected to the bracket arranged on the inner locking piece through a rotating shaft, and the bottom end face of the swing rod penetrates through the locking hole and forms a friction self-locking condition with the first outer locking piece and the second outer locking piece; when unlocking, the fixed unlocking piece or the sliding unlocking piece drives the top end of the swing rod to enable the bottom of the swing rod to rotate so as to be separated from the first external locking piece or the second external locking piece;
the torsion spring is sleeved on the rotating shaft, and two extending arms of the torsion spring are respectively connected with the inner locking piece and the oscillating bar;
and the roller is rotatably arranged at the bottom of the oscillating bar, and in a furled state, the roller is mutually extruded with the outer sleeved part or the middle sleeved part of the upper-stage furling and unfolding locking part under the action of the torsion spring.
4. The extension mechanism according to claim 3, wherein the inner wall of the first outer locking member and the inner wall of the second outer locking member each include a locking groove, and wherein the swing link is rotated by the torsion spring during extension so that the bottom end surface of the swing link is frictionally self-locked with the locking grooves.
5. An extension mechanism as claimed in any one of claims 1 to 4, wherein said outer telescoping member comprises:
the outer sleeve connecting piece is embedded with a second folding and unfolding locking component, and the top end of the outer sleeve connecting piece is connected with a first outer locking piece; and
and the end cover is arranged at the bottom end of the outer sleeve connecting piece and is provided with an inlet/outlet.
6. An extension mechanism as claimed in any one of claims 2 to 4, wherein said inner locking member comprises:
the first cylindrical section is in dynamic sealing connection with the outer sleeved part or the next-stage middle sleeved part, and a mounting hole for fixing the self-locking mechanism is formed in the first cylindrical section;
the first circular table surface section is connected to the top end of the first cylindrical section, the outer surface of the first circular table surface section is a circular table surface, and the inner surfaces of the first external locking piece and the second external locking piece are provided with surfaces matched with the first circular table surface section; and the number of the first and second groups,
and the thread section is connected to the top end of the first circular table surface section and is used for connecting an intermediate sleeve piece.
7. The stretching mechanism as claimed in claim 6, wherein said first cylindrical section has a plurality of annular grooves formed in a bottom end thereof for receiving a slide ring and a dynamic seal ring, respectively.
8. An extension mechanism as claimed in any one of claims 2 to 4, wherein the configuration of the first outer locking member and the configuration of the second outer locking member each comprise:
the bottom end of the second cylindrical section is connected with the outer sleeved part or the middle sleeved part, and the inner wall of the second cylindrical section is provided with a self-locking structure formed by the self-locking mechanism;
the third cylindrical section is in dynamic sealing connection with the middle sleeve connector of the previous stage; and
and the second circular table surface section is positioned between the second cylindrical section and the third cylindrical section, and the inner surface of the second circular table surface section is a conical surface and used for limiting the inner locking piece.
9. The stretching mechanism as claimed in claim 8, wherein said third cylindrical section has a plurality of annular grooves formed on an inner wall thereof for receiving a slide ring and a dynamic seal ring, respectively.
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| CN201920248874.7U CN209939005U (en) | 2019-02-27 | 2019-02-27 | Can repeat and take up and expand extension mechanism |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111186530A (en) * | 2020-01-21 | 2020-05-22 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Quick and labor-saving opening and closing handle mechanism for pressure-resistant hatch cover |
| CN111591471A (en) * | 2020-04-30 | 2020-08-28 | 南京理工大学 | Braking sail derailing device applied to standing satellite |
| CN113374762A (en) * | 2021-07-20 | 2021-09-10 | 北京航空航天大学 | Multi-stage heavy-load socket joint type extending arm based on rope driving |
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2019
- 2019-02-27 CN CN201920248874.7U patent/CN209939005U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111186530A (en) * | 2020-01-21 | 2020-05-22 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Quick and labor-saving opening and closing handle mechanism for pressure-resistant hatch cover |
| CN111591471A (en) * | 2020-04-30 | 2020-08-28 | 南京理工大学 | Braking sail derailing device applied to standing satellite |
| CN113374762A (en) * | 2021-07-20 | 2021-09-10 | 北京航空航天大学 | Multi-stage heavy-load socket joint type extending arm based on rope driving |
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