CN211001920U - Multistage pneumatic telescopic machanism that can repeatedly lock and separate - Google Patents
Multistage pneumatic telescopic machanism that can repeatedly lock and separate Download PDFInfo
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- CN211001920U CN211001920U CN201921737136.5U CN201921737136U CN211001920U CN 211001920 U CN211001920 U CN 211001920U CN 201921737136 U CN201921737136 U CN 201921737136U CN 211001920 U CN211001920 U CN 211001920U
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Abstract
The utility model discloses a multistage pneumatic telescopic machanism that can repeatedly lock and separate. Use the utility model discloses can provide good locking function for multistage pneumatic telescopic machanism to can carry out the function of drawing in of unblock in order to realize the cylinder. The utility model discloses a multistage cylinder, section of thick bamboo internal lock, sealing member, support ring and suction nozzle etc. combine thin wall drum and wedge phase lock, possess big bearing capacity and quick response characteristics, can stretch out and keep the locking at a high speed under the high-pressure gas effect. Under the locking state, certain pressure gas is introduced from the unlocking gas inlet nozzle to realize the automatic unlocking function of the cylinder inner lock. The utility model discloses maintainability is high, and easy consumable part is changed conveniently, possesses repeatedly that the locking bears and the unblock draws in the function in, and the reliability is high, can be used to the ground landing leg of repeatedly usable delivery vehicle or spacecraft that has big bearing capacity demand.
Description
Technical Field
The utility model belongs to the field of machinery, a multistage pneumatic telescopic machanism is related to.
Background
The reuse technology is considered as an important means for reducing space transportation cost, and is also an effective way for improving the capacity of quick response space. At present, a great deal of research is carried out on the technology of repeatedly using the carrier in countries such as the united states, europe, russia, japan, india and the like, wherein the influence is large that the united states SpaceX company and blue origin company realize the recovery and utilization of rocket bodies through the ground landing of one sub-stage of rocket.
The deployable landing leg type landing mode is wider in the aspect of soft landing application of the carrier or the landing device, and with the increasing urgent demands on the heaviness and economy of the carrier or the landing device, the landing leg has higher and higher requirements on large bearing performance, reusability and reliability. The traditional landing leg usually has the defects of complex structure and incapability of automatically unlocking, and has limited bearing capacity and poor reusability.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the utility model provides a multistage telescopic machanism with repeated locking and unblock function, expand locking, big bearing capacity and high reliability fast.
The utility model adopts the technical proposal that: a multi-stage pneumatic telescopic mechanism capable of being locked and unlocked repeatedly comprises a bottom end cover, a top end cover, a multi-stage cylinder barrel, a cylinder inner lock and an air inlet nozzle;
the multistage cylinder barrel comprises a plurality of cylinders with different diameters and is of a coaxial nested structure, wherein each stage of cylinder barrel respectively slides in the adjacent outer cylinder barrel along the axial direction;
the air inlet nozzle is divided into an unfolding air inlet nozzle and an unlocking air inlet nozzle, wherein the unfolding air inlet nozzle is arranged on the bottom end cover, and the unlocking air inlet nozzle is arranged on the top end cover; the cylinder inner lock is arranged between adjacent cylinder barrels of the multi-stage cylinder barrels and is provided with a wedge-shaped block locking assembly capable of automatically locking under the elastic acting force;
gas is introduced from the unfolding gas inlet nozzle, and the multi-stage cylinder barrel extends out and is locked in place under the action of air pressure; the multistage cylinder barrel is in a locking state, gas is introduced from the unlocking air inlet nozzle, the cylinder inner lock is automatically unlocked, and the multistage cylinder barrel is contracted.
The cylinder inner lock comprises a lock cylinder, a wedge-shaped block, a sliding block, a piston, a locking spring, a support ring and an unlocking ring; the lock cylinder is a step-shaped cylinder, the support ring is arranged on the inner wall of the small end of the lock cylinder, and the inner wall of the large end of the lock cylinder is provided with a wedge-shaped block clamping groove; the unlocking ring and the piston are arranged at the end part of the cylinder barrel, the locking spring and the sliding block are sleeved on a central cylinder of the unlocking ring, the central cylinder of the unlocking ring extends into the piston, and the sliding block is limited by a flanging structure at the end part of the central cylinder of the unlocking ring; one end of the piston is circumferentially provided with a plurality of wedge block mounting holes, the wedge blocks are mounted in the wedge block mounting holes, the sliding block moves along the inner wall of the piston under the action of the locking spring, the piston is mounted in the large end of the lock cylinder, the small end of the lock cylinder is connected with the end part of the next-stage cylinder, and the support ring slides along the outer wall of the next-stage cylinder; under the pushing of the sliding block, the wedge-shaped block is clamped into the wedge-shaped block clamping groove on the inner wall of the lock cylinder, and locking is achieved.
The locking spring is held in contact with the slider in a compressed state.
The wedge-shaped block is an arc-shaped block, the cross section of the wedge-shaped block is trapezoidal, and the wedge-shaped block is uniformly arranged along the circumferential direction of the piston.
The cylinder inner lock also comprises a sealing element which is arranged on the inner wall of the small end of the lock cylinder to prevent air leakage.
And a sealing ring is arranged between the unlocking ring and the inner wall of the cylinder barrel.
The air inlet nozzle is unfolded to introduce air, the piston is pushed to move along the cylinder barrel, after the end part of the piston enters the lock barrel, the locking spring in a compressed state pushes the sliding block to move, the sliding block ejects the wedge block from the wedge block mounting hole and clamps the wedge block into the wedge block clamping groove of the lock barrel, and locking is achieved.
The unlocking air inlet nozzle is filled with air, the sliding block is pushed to release the wedge block, and locking is released, so that the piston moves in the cylinder barrel, and contraction of the multi-stage cylinder barrel is realized.
The number of wedge blocks is 6 or 12.
The cylinder barrel is made of stainless steel.
Compared with the prior art, the utility model beneficial effect be:
(1) the utility model adopts pneumatic pressure as a driving source, has higher unfolding speed, and can realize the orderly step-by-step unfolding or folding function;
(2) the utility model adopts the wedge-shaped block as the lock core structure of the cylinder inner lock, and has the characteristics of compact layout and large bearing capacity; the utility model discloses can provide good locking function for multistage pneumatic telescopic machanism to can carry out the function of drawing in of unblock in order to realize the cylinder.
(3) The utility model discloses a simple structure component, easy dismounting, maintainability is good, and used repeatedly many times bears greatly, long stroke and can launch fast for the ground landing leg of repeatedly usable delivery vehicle or spacecraft.
Drawings
FIG. 1 is a structural cross-sectional view of the multi-stage pneumatic retractable mechanism of the present invention in an expanded locked state;
fig. 2 is a structural cross-sectional view of the multi-stage pneumatic telescopic mechanism capable of being repeatedly locked and unlocked according to the present invention in a folded state;
fig. 3 is a schematic structural view of the lock cylinder of the present invention;
fig. 4 is a schematic structural view of a wedge of the present invention;
fig. 5 is a schematic structural diagram of the piston of the present invention.
The reference numbers in the figures illustrate:
the cylinder lock comprises a bottom end cover 1, a first-stage cylinder barrel 2, a first-stage cylinder barrel 3, a second-stage cylinder barrel 4, a second-stage cylinder barrel 5, a third-stage cylinder barrel 6, a third-stage cylinder barrel 7, a fourth-stage cylinder barrel 8, a top end cover 9, a support ring 10, a seal ring 11, a lock barrel 12, a wedge block 13, a sliding block 14, a piston 15, a locking spring 16 and an unlocking ring 17.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, the multi-stage pneumatic telescopic mechanism capable of being repeatedly locked and unlocked of the present invention comprises a bottom end cover 1, a top end cover 9, a multi-stage cylinder, a cylinder inner lock and an air inlet nozzle. The cylinder inner lock comprises a lock cylinder 12, a wedge block 13, a sliding block 14, a piston 15, a locking spring 16, a sealing piece 11, a supporting ring 10 and an unlocking ring 17.
The multi-stage cylinder barrel is a coaxial barrel structure formed by mutually nesting a series of thin-wall cylinders with different diameters, and each stage of cylinder barrel can respectively slide in the adjacent outer cylinder barrel along the axial direction.
The air inlet nozzle is divided into an expansion air inlet nozzle and an unlocking air inlet nozzle which are respectively arranged on the two end covers of the multi-stage pneumatic telescopic mechanism. High-pressure gas is introduced from the unfolding gas inlet nozzle to generate outward thrust on the unlocking ring 17 at the bottom of each stage of cylinder barrel, and the unlocking ring 17 pushes the cylinder barrel and the cylinder inner lock to extend outwards and lock in place; when the multi-stage pneumatic telescopic mechanism is in a locked state, certain pressure gas is introduced from the unlocking gas inlet nozzle, and the gas thrust overcomes the elastic force of the locking spring 16 to enable the sliding block 14 to leave the locked position, so that the automatic unlocking function of the cylinder inner lock can be realized.
The cylinder inner lock is arranged between adjacent cylinder barrels of the multi-stage cylinder barrels and is a wedge block locking assembly capable of automatically locking under the action of elastic force, and wedge blocks 13 are embedded between a lock cylinder 12 and a piston 15 of the cylinder inner lock and are uniformly arranged along the circumferential direction to serve as lock cylinders to achieve the in-place locking function of the multi-stage cylinder barrels.
The cylinder inner lock comprises a lock cylinder 12, a wedge block 13, a sliding block 14, a piston 15, a locking spring 16, a support ring 10, an unlocking ring 17 and a sealing element 11; as shown in fig. 3, the lock cylinder 12 is a stepped cylinder, the support ring 10 and the sealing element 11 are mounted on the inner wall of the small end of the lock cylinder 12, and the inner wall of the large end of the lock cylinder 12 is provided with a wedge-shaped block slot; the unlocking ring 17 and the piston 15 are arranged at the end part of the cylinder barrel, the locking spring 16 and the sliding block 14 are sleeved on a central cylinder of the unlocking ring 17, and the central cylinder of the unlocking ring 17 extends into the piston 15; as shown in fig. 5, one end of the piston 15 is circumferentially provided with a plurality of wedge block mounting holes, the wedge blocks 13 are mounted in the wedge block mounting holes, the slider 14 moves along the inner wall of the piston 15 under the action of the upper locking spring 16, the piston 15 is mounted in the large end of the lock cylinder 12, the small end of the lock cylinder 12 is connected with the end part of the next-stage cylinder, and the support ring 10 slides along the outer wall of the next-stage cylinder; under the pushing of the sliding block 14, the wedge-shaped block 13 is clamped into the wedge-shaped block clamping groove on the inner wall of the lock cylinder 12, so that locking is realized. As shown in fig. 4, the wedge block 13 is an arc block with a trapezoidal cross section and is uniformly arranged along the circumferential direction of the piston 15. And a sealing ring is arranged between the unlocking ring 17 and the inner wall of the cylinder barrel.
The air inlet nozzle is unfolded to introduce air, the piston 15 is pushed to move along the cylinder barrel, after the end part of the piston 15 enters the lock barrel 12, the locking spring 16 in a compressed state pushes the sliding block 14 to move, and the sliding block 14 ejects the wedge block 13 from the wedge block mounting hole and clamps the wedge block into the wedge block clamping groove of the lock barrel 12 to realize locking.
The unlocking air inlet nozzle is filled with air, the sliding block 14 is pushed to release the wedge block 13, locking is released, the piston 15 moves in the cylinder barrel, and contraction of the multi-stage cylinder barrel is achieved.
The sealing element 11 and the supporting ring 10 are arranged at the port of the lock cylinder 12, so that the air tightness requirement of the multi-stage pneumatic telescopic mechanism in the telescopic process is ensured, and the multi-stage cylinder barrel is radially supported to meet the coaxiality requirement of the multi-stage cylinder barrel.
The multi-stage pneumatic telescopic mechanism is used for introducing gas from the unfolding gas inlet nozzle, so that the multi-stage cylinder barrel can stretch out to realize the step-by-step unfolding function of the multi-stage pneumatic telescopic mechanism; and gas is introduced from the unlocking gas inlet nozzle, so that the cylinder inner lock can be unlocked, and the function of gradually unlocking the multi-stage pneumatic telescopic mechanism is realized under the matching of the unlocking ring.
The number and the length of the multi-stage cylinder barrels can be adjusted adaptively according to the use requirements.
The number of the wedge blocks of the cylinder inner lock can be reasonably determined according to the layout space of the multistage cylinder barrel and the bearing requirements of the multistage pneumatic telescopic mechanism.
Example (b):
the embodiment of the utility model provides an use level four pneumatic telescopic machanism as an example, it expandes the locking state structure to constitute as shown in fig. 1, it expandes the air inlet to dispose on the bottom end cover 1, bottom end cover 1 links firmly with one-level cylinder 2, one-level section of thick bamboo internal lock 3 respectively with one-level cylinder 2, second grade cylinder 4 keeps being connected, second grade section of thick bamboo internal lock 5 respectively with second grade cylinder 4, tertiary cylinder 6 keeps being connected, tertiary section of thick bamboo internal lock 7 respectively with tertiary cylinder 6, level four cylinder 8 keeps being connected, top end cover 9 is installed at level four cylinder 8's tip, it disposes the unblock air inlet on it, support ring 10, sealing washer 11 forms the sliding kinematic pair along with a section of thick. The four-stage pneumatic telescopic mechanism can realize reliable unfolding and locking functions by ventilating at an unfolding air inlet of the bottom end cover 1, and can realize unlocking functions by ventilating at an unlocking air inlet of the top end cover 9.
The utility model discloses a section of thick bamboo internal lock is installed between two adjacent cylinders of multistage cylinder, and wedge 13 retrains in the locking hole of piston 15, is connected a lock section of thick bamboo 12 and piston 15 as whole, and the spring 16 cover of locking is on the outer face of cylinder of deblocking ring 17, and keeps and slider 14 contact with compression state. When the multi-stage pneumatic telescopic mechanism is unfolded in place, the barrel is locked in place under the elastic action of the upper locking spring 16, the sliding block 14 automatically pushes the wedge-shaped block 13 out in the radial direction and is nested between the lock barrel 12 and the piston 15, and the locking and locking functions are realized.
The unlocking air inlet of the top end cover 9 is ventilated, the sliding block 14 is pushed, the wedge block 13 is unlocked, the wedge block 13 moves inwards to realize unlocking, the piston 15 is pushed to slide along the inner wall of the next stage of cylinder barrel, and the contraction of each stage of cylinder barrel is realized.
The utility model discloses a section of thick bamboo internal lock, the quantity and the size of wedge 13 receive the overall arrangement space and the bearing requirement restriction of multistage cylinder, its principle is that wedge 13 is arranged along the even interval of 15 circumference of piston, and the quantity of its preferred is 6 or 12.
The utility model discloses multistage cylinder can be thin wall stainless steel material, adopts thick wall light non-metallic material also the selection of preferred under the condition that the structure size allows.
The utility model discloses multistage cylinder's wall thickness, diameter etc. should compromise multistage pneumatic telescopic machanism's bearing strength and stability can, the quantity of multistage cylinder can be based multistage pneumatic telescopic machanism draw in height and expand the length demand and adjust in, but the scheme of preferred should be that the quantity of multistage cylinder is better more less.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the scope of the claims. Any variations and modifications, equivalent substitutions and improvements, etc., which may occur to those skilled in the art, are intended to be included within the scope of the present invention without departing from the spirit and scope of the invention.
The detailed description of the present invention is not given to the prior art.
Claims (10)
1. A multi-stage pneumatic telescopic mechanism capable of being locked and unlocked repeatedly is characterized by comprising a bottom end cover (1), a top end cover (9), a multi-stage cylinder barrel, a cylinder inner lock and an air inlet nozzle;
the multistage cylinder barrel comprises a plurality of cylinders with different diameters and is of a coaxial nested structure, wherein each stage of cylinder barrel respectively slides in the adjacent outer cylinder barrel along the axial direction;
the air inlet nozzle is divided into an unfolding air inlet nozzle and an unlocking air inlet nozzle, the unfolding air inlet nozzle is arranged on the bottom end cover (1), and the unlocking air inlet nozzle is arranged on the top end cover (9); the cylinder inner lock is arranged between adjacent cylinder barrels of the multi-stage cylinder barrels and is provided with a wedge-shaped block locking assembly capable of automatically locking under the elastic acting force;
gas is introduced from the unfolding gas inlet nozzle, and the multi-stage cylinder barrel extends out and is locked in place under the action of air pressure; the multistage cylinder barrel is in a locking state, gas is introduced from the unlocking air inlet nozzle, the cylinder inner lock is automatically unlocked, and the multistage cylinder barrel is contracted.
2. The multi-stage pneumatic telescoping mechanism of claim 1, wherein: the cylinder inner lock comprises a lock cylinder (12), a wedge block (13), a slide block (14), a piston (15), a locking spring (16), a support ring (10) and an unlocking ring (17); the lock cylinder (12) is a stepped cylinder, the support ring (10) is arranged on the inner wall of the small end of the lock cylinder (12), and the inner wall of the large end of the lock cylinder (12) is provided with a wedge-shaped block clamping groove; the unlocking ring (17) and the piston (15) are arranged at the end part of the cylinder barrel, the locking spring (16) and the sliding block (14) are sleeved on a central cylinder of the unlocking ring (17), the central cylinder of the unlocking ring (17) extends into the piston (15), and the sliding block (14) is limited by a flanging structure at the end part of the central cylinder of the unlocking ring (17); one end of a piston (15) is circumferentially provided with a plurality of wedge block mounting holes, wedge blocks (13) are mounted in the wedge block mounting holes, a sliding block (14) moves along the inner wall of the piston (15) under the action of an upper locking spring (16), the piston (15) is mounted in the large end of a lock cylinder (12), the small end of the lock cylinder (12) is connected with the end part of a next-stage cylinder barrel, and a support ring (10) slides along the outer wall of the next-stage cylinder barrel; under the pushing of the sliding block (14), the wedge-shaped block (13) is clamped into the wedge-shaped block clamping groove on the inner wall of the lock cylinder (12) to realize locking.
3. The multi-stage pneumatic telescoping mechanism of claim 2, wherein: the locking spring (16) is held in contact with the slider (14) in a compressed state.
4. A relockable, multi-stage pneumatic retraction mechanism as claimed in claim 2 or 3, wherein: the wedge-shaped block (13) is an arc-shaped block, the section of the wedge-shaped block is trapezoidal, and the wedge-shaped block is uniformly arranged along the circumferential direction of the piston (15).
5. The relockable, multi-stage pneumatic telescoping mechanism of claim 4, wherein: the cylinder inner lock also comprises a sealing element (11), and the sealing element (11) is arranged on the inner wall of the small end of the lock cylinder (12) to prevent air leakage.
6. The relockable, multi-stage pneumatic telescoping mechanism of claim 5, wherein: a sealing ring is arranged between the unlocking ring (17) and the inner wall of the cylinder barrel.
7. The relockable, multi-stage pneumatic telescoping mechanism of claim 6, wherein: the air inlet nozzle is unfolded to introduce air, the piston (15) is pushed to move along the cylinder barrel, after the end part of the piston (15) enters the lock barrel (12), the locking spring (16) in a compressed state pushes the sliding block (14) to move, the sliding block (14) pushes the wedge block (13) out of the wedge block mounting hole and clamps the wedge block into the wedge block clamping groove of the lock barrel (12), and locking is achieved.
8. The relockable, multi-stage pneumatic telescoping mechanism of claim 7, wherein: the air inlet nozzle is unlocked to introduce air, the sliding block (14) is pushed to release the wedge-shaped block (13), and locking is released, so that the piston (15) moves in the cylinder barrel, and the contraction of the multi-stage cylinder barrel is realized.
9. A relockable, multi-stage pneumatic telescoping mechanism as in claim 3, wherein: the number of the wedge blocks (13) is 6 or 12.
10. The multi-stage pneumatic telescoping mechanism of claim 1, wherein: the cylinder barrel is made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921737136.5U CN211001920U (en) | 2019-10-16 | 2019-10-16 | Multistage pneumatic telescopic machanism that can repeatedly lock and separate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921737136.5U CN211001920U (en) | 2019-10-16 | 2019-10-16 | Multistage pneumatic telescopic machanism that can repeatedly lock and separate |
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| Publication Number | Publication Date |
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| CN211001920U true CN211001920U (en) | 2020-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921737136.5U Active CN211001920U (en) | 2019-10-16 | 2019-10-16 | Multistage pneumatic telescopic machanism that can repeatedly lock and separate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113154957A (en) * | 2021-04-15 | 2021-07-23 | 湖北航天技术研究院总体设计所 | Rocket shelter device and using method thereof |
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2019
- 2019-10-16 CN CN201921737136.5U patent/CN211001920U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113154957A (en) * | 2021-04-15 | 2021-07-23 | 湖北航天技术研究院总体设计所 | Rocket shelter device and using method thereof |
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