CN109307032B - Repeatedly usable's passive energy-absorbing draws/presses two-way buffer - Google Patents
Repeatedly usable's passive energy-absorbing draws/presses two-way buffer Download PDFInfo
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- CN109307032B CN109307032B CN201811358986.4A CN201811358986A CN109307032B CN 109307032 B CN109307032 B CN 109307032B CN 201811358986 A CN201811358986 A CN 201811358986A CN 109307032 B CN109307032 B CN 109307032B
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 106
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 106
- 230000007246 mechanism Effects 0.000 claims abstract description 20
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 15
- 241000264877 Hippospongia communis Species 0.000 claims description 104
- 230000006835 compression Effects 0.000 claims description 57
- 238000007906 compression Methods 0.000 claims description 57
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 230000009471 action Effects 0.000 claims description 6
- 239000011358 absorbing material Substances 0.000 abstract description 8
- 238000013461 design Methods 0.000 abstract description 3
- 239000000306 component Substances 0.000 description 37
- 238000010521 absorption reaction Methods 0.000 description 16
- 230000003139 buffering effect Effects 0.000 description 16
- 239000004411 aluminium Substances 0.000 description 15
- 239000000463 material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- -1 mechanical springs Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/12—Vibration-dampers; Shock-absorbers using plastic deformation of members
- F16F7/121—Vibration-dampers; Shock-absorbers using plastic deformation of members the members having a cellular, e.g. honeycomb, structure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/12—Vibration-dampers; Shock-absorbers using plastic deformation of members
- F16F7/128—Vibration-dampers; Shock-absorbers using plastic deformation of members characterised by the members, e.g. a flat strap, yielding through stretching, pulling apart
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- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses a reusable passive energy-absorbing pull/press bidirectional buffer, which belongs to the technical field of space equipment, and mainly comprises four parts, namely an outer barrel component, a middle barrel component coaxially arranged in the outer barrel component, an inner barrel component coaxially arranged in the middle barrel component and a pull barrel component coaxially arranged at the periphery of the joint of the outer barrel component and the middle barrel component; the device combines a mechanical spring reset device, a ratchet one-way locking device and a pulling/pressing two-way buffer based on an aluminum honeycomb crushing energy-absorbing material through an aluminum honeycomb reset mechanism with an innovative design, fully inherits the advantages of simple structure, light weight and high reliability of the traditional passive energy-absorbing two-way buffer, realizes the reusability of the traditional pulling/pressing two-way buffer, and can be used for a reusable soft landing device required by a future multi-target deep space exploration task.
Description
Technical Field
The invention belongs to the technical field of space equipment, and particularly relates to a reusable passive energy-absorbing pull/press bidirectional buffer serving as an auxiliary buffer strut on a reusable star surface soft landing device.
Background
With the progress of the technology, in the future deep space exploration task, one-time launching is to finish multi-point soft landing exploration on the same target star or soft landing exploration on a plurality of target stars, which puts requirements on the development of a reusable soft landing device, so that the comprehensive cost of a single exploration task including launching is reduced while the increasingly frequent deep space exploration requirements are met.
In the star catalogue survey soft landing device, the leg-foot type landing buffering mechanism is a key component, wherein the main/auxiliary buffering support is a core component for realizing the function of the landing buffering mechanism, and the success or failure of the whole landing buffering process is determined. The nature of the soft landing gear to be reusable is to make the buffer reusable.
Currently, the energy absorption modes of the buffer can be roughly divided into hydraulic pressure, magnetorheological damping fluid, mechanical springs, material deformation and the like. The hydraulic energy absorption device is rarely applied due to the influence of problems such as sealing performance, oil characteristics in a space environment and the like; the magnetorheological damping energy absorption device is complex in structure and immature in related research, and the reliability cannot be effectively guaranteed; the mechanical spring energy absorption device can be easily recovered, but the buffering energy absorption performance is limited; the deformation energy absorption device taking the aluminum honeycomb as a representative material has wide application, high energy absorption ratio and high reliability, but cannot be recovered after being crushed, and the energy absorption material can only be reset in other modes.
Disclosure of Invention
The invention aims at the defect that a pull/press bidirectional buffer in the existing star surface detection soft landing device cannot be reused, and discloses an aluminum honeycomb reset mechanism with innovative design.
The invention is realized by the following steps:
the invention discloses a reusable passive energy-absorbing pull/press bidirectional buffer which mainly comprises four parts, including an outer barrel component, a middle barrel component coaxially arranged in the outer barrel component, an inner barrel component coaxially arranged in the middle barrel component and a pull barrel component coaxially arranged at the periphery of the joint of the outer barrel component and the middle barrel component.
The outer barrel component comprises an outer barrel, a compression-resistant aluminum honeycomb bracket, a compression-resistant aluminum honeycomb bracket resetting compression spring, a ratchet mechanism and a compression-resistant aluminum honeycomb bracket unlocking fire bolt; the middle cylinder assembly comprises a middle cylinder, a steel ball lock, a middle cylinder return spring and an electromagnetic clamping block; the inner cylinder assembly comprises an inner cylinder, a spherical hinge at the top of the inner cylinder and an inner cylinder return spring; the pull cylinder component comprises a pull cylinder, a tensile aluminum honeycomb bracket resetting pressure spring and a tensile aluminum honeycomb bracket unlocking fire bolt;
the device of the invention consists of four parts, namely an outer barrel component, a middle barrel component, an inner barrel component and a pull barrel component, wherein the connection relation of the specific parts is as follows:
the outer barrel component comprises an outer barrel, and a compression-resistant aluminum honeycomb bracket resetting compression spring and a compression-resistant aluminum honeycomb bracket are sequentially arranged in the outer barrel from the bottom to the top; the compression-resistant aluminum honeycomb bracket is internally provided with compression-resistant aluminum honeycombs; the upper part and the lower part of the outer wall of the outer barrel are respectively and uniformly distributed with a plurality of groups of ratchet mechanisms along the circumferential direction.
The pull cylinder component comprises a pull cylinder, a tensile aluminum honeycomb bracket is coaxially arranged in the pull cylinder, one end of the tensile aluminum honeycomb bracket is provided with an annular flange, and the outer diameter of one end provided with the annular flange is in clearance fit with the inner diameter of a cylinder body of the pull cylinder; the outer diameter of the other end of the tensile aluminum honeycomb bracket is in clearance fit with the inner diameter of a flange at the top of the pull cylinder; the annular flange of tensile aluminium honeycomb bracket keep off between the ring with the tensile aluminium honeycomb bracket that sets up on the urceolus outer wall, realize the fastening connection between tensile aluminium honeycomb bracket and the urceolus through a plurality of tensile aluminium honeycomb bracket unblock firer bolt along circumference equipartition on the annular flange of tensile aluminium honeycomb bracket.
Tensile aluminum honeycombs are arranged in an annular cavity between the inner wall of the pull cylinder and the tensile aluminum honeycomb bracket, so that the structural strength of the pull cylinder during stretching and buffering can be enhanced by crushing the aluminum honeycombs; a tensile aluminum honeycomb bracket reset pressure spring is arranged in an annular cavity between the inner wall of the pull cylinder and the outer wall of the outer cylinder; the upper opening of the pull cylinder is of a double-layer structure with two different calibers, namely a large caliber at the end part of the pull cylinder and a small caliber at the end part of the pull cylinder.
Further, the middle barrel assembly comprises a middle barrel coaxially arranged in the outer barrel, and the middle barrel assembly is coaxially arranged in the outer barrel assembly and can do reciprocating motion relative to the extension/retraction of the outer barrel assembly. One end of the middle cylinder is in a cone frustum shape, and the outer diameter of the cone frustum is in clearance fit with the inner diameter of the cylinder body of the compression-resistant aluminum honeycomb bracket; the other end of the middle cylinder is provided with a steel ball lock; an annular baffle is arranged on the inner wall of the outer barrel, and a middle barrel return spring is arranged between the circular truncated cone at one end of the middle barrel and the annular baffle.
Furthermore, the middle cylinder assembly also comprises an electromagnetic fixture block, and the electromagnetic fixture block is positioned at the joint of the middle cylinder and the pull cylinder assembly; the electromagnetic fixture block and the middle cylinder are axially fixed. Under the control of the controller, the middle cylinder and the pull cylinder are connected or disconnected in a one-way mode through the electromagnetic clamping block.
Further, the electromagnetic fixture block comprises an electromagnetic fixture block clamping ring and electromagnetic fixture block movable blocks which are uniformly distributed on the electromagnetic fixture block clamping ring in the circumferential direction; the electromagnetic clamping block is in a normally open type, namely after the electromagnetic clamping block is electrified, the clamping block is attracted by the coil, and the outer diameter of the electromagnetic clamping block is reduced. Specifically, the method comprises the following steps:
when the electromagnetic fixture block is in a power-off state, the movable block of the electromagnetic fixture block is in a natural expansion state, and the large caliber of the end part of the pull cylinder is larger than the outer diameter of the electromagnetic fixture block after the power-off state; the small caliber of the end part of the pull cylinder is smaller than the outer diameter of the electromagnetic clamping block after power failure; when the electromagnetic fixture block is in a power-on state, the movable block of the electromagnetic fixture block shrinks, and the external diameter of the powered electromagnetic fixture block is smaller than the small caliber of the end part of the pull cylinder.
Further, the inner cylinder assembly comprises an inner cylinder, an inner cylinder reset spring is arranged on the outer wall of the inner cylinder, one end of the inner cylinder reset spring is connected with the outer end face of the steel ball lock of the middle cylinder, and the other end of the inner cylinder reset spring is connected with the inner end face of the flange of the inner cylinder; the top of the inner cylinder is provided with an inner cylinder top spherical hinge; the outer wall of the inner cylinder is provided with an annular groove, and the annular groove is matched with the steel ball in a locking way.
Further, among the urceolus subassembly, the internal diameter of the coaxial cooperation part of resistance to compression aluminium honeycomb bracket is greater than the internal diameter of resistance to compression aluminium honeycomb bracket pressure spring coaxial cooperation part that resets for form an annular step at the urceolus inner wall, the outer wall bottom of resistance to compression aluminium honeycomb bracket cooperatees with the annular step on the urceolus inner wall, and realize the fastening connection of resistance to compression aluminium honeycomb bracket and urceolus through a plurality of resistance to compression aluminium honeycomb bracket unblock firer bolt along circumference equipartition in resistance to compression aluminium honeycomb bracket bottom.
Furthermore, ratchet grooves are formed in the inner wall of the tensile aluminum honeycomb bracket and the outer wall of the compressive aluminum honeycomb bracket, and the ratchet grooves are matched with the ratchet mechanism; each ratchet in the ratchet mechanism is kept tightly meshed with the ratchet groove under the action of the spring piece or the torsion spring, so that the tensile aluminum honeycomb bracket and the compressive aluminum honeycomb bracket can only slide coaxially with the outer cylinder in one direction.
The beneficial effects of the invention and the prior art are as follows:
1) according to the aluminum honeycomb energy-absorbing material resetting mechanism, the ratchet mechanism arranged on the outer barrel is matched with the compression-resistant aluminum honeycomb bracket and the ratchet grooves on the tension-resistant aluminum honeycomb bracket to realize unidirectional locking of the aluminum honeycomb energy-absorbing material resetting mechanism, so that the requirement of repeated use is met, and the space and the quality are saved;
2) the resetting of the compression-resistant aluminum honeycomb bracket and the tension-resistant aluminum honeycomb bracket is realized in a manner of unlocking by the firer bolt and releasing the energy storage pressure spring, and compared with motor driving, the resetting device has lighter weight and simpler control;
3) according to the invention, the reset mechanism of the buffering energy-absorbing material takes the compression-resistant aluminum honeycomb bracket and the tensile aluminum honeycomb bracket as main parts, so that the reset of the aluminum honeycomb passive energy-absorbing material after landing buffering is realized, and the repeated use is realized while the advantages of stable performance, high reliability and the like of the aluminum honeycomb material are kept;
4) the whole structure and the mechanism design of the invention can be repeatedly used, and fully inherits the advantages of simple structure, light weight and high reliability of the traditional passive energy-absorbing bidirectional buffer, and has stronger universality;
5) in conclusion, the device combines a mechanical spring reset device, a ratchet one-way locking device and a pull/press two-way buffer based on an aluminum honeycomb crushing energy-absorbing material, provides a reusable pull/press two-way buffer which has a simple structure, high engineering realizability and reliability and strong universality and transportability, and can be used as a reusable soft landing device required by a future multi-target deep space exploration task.
Drawings
FIG. 1 is a schematic structural view of a reusable passive energy absorbing pull/push bi-directional bumper of the present invention;
FIG. 2 is a cross-sectional view of a reusable passive energy absorbing pull/push bi-directional bumper of the present invention.
FIG. 3 is a schematic diagram of an electromagnetic card block in a reusable passive energy-absorbing pull/press bi-directional buffer according to the present invention;
in the figure: 1. the outer cylinder component, the middle cylinder component, the inner cylinder component, the pull cylinder component, the outer cylinder, the compression-resistant aluminum honeycomb bracket, the pull cylinder, the ratchet mechanism, the steel ball lock, the middle cylinder return spring, the electromagnetic clamping block, the inner cylinder top ball hinge, the inner cylinder return spring, the pull cylinder, the tensile aluminum honeycomb bracket return compression spring, the tensile aluminum honeycomb bracket, the electromagnetic clamping ring, the electromagnetic clamping block movable block, the electromagnetic clamping block, the pull cylinder, 412. The end part of the pull cylinder has a large caliber.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention more clear, the present invention is further described in detail by the following examples. It should be noted that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1-2, the reusable passive energy-absorbing pull/press bidirectional buffer of the present invention is composed of an outer cylinder assembly 1, a middle cylinder assembly 2, an inner cylinder assembly 3 and a pull cylinder assembly 4.
The outer cylinder component 1 comprises an outer cylinder 11, a compression-resistant aluminum honeycomb bracket 12, a compression-resistant aluminum honeycomb 13, a compression-resistant aluminum honeycomb bracket resetting compression spring 14, a ratchet mechanism 15, a compression-resistant aluminum honeycomb bracket unlocking fire bolt 16 and a tensile aluminum honeycomb bracket retaining ring 46 arranged on the outer wall of the outer cylinder 11; the middle barrel component 2 comprises a middle barrel 21, a steel ball lock 22, a middle barrel return spring 23 and an electromagnetic fixture block 24; the inner cylinder component 3 comprises an inner cylinder 31, an inner cylinder top spherical hinge 32 and an inner cylinder return spring 33; the slide subassembly 4 include slide 41, tensile aluminium honeycomb 42, tensile aluminium honeycomb bracket 43, tensile aluminium honeycomb bracket pressure spring 44 that resets, tensile aluminium honeycomb bracket unblock firer bolt 45.
The inner cylinder assembly 3 is coaxially arranged in the middle cylinder assembly 2, the inner cylinder 31 extends relative to the middle cylinder 21 through a pre-tightened compression spring, and the inner cylinder 31 is locked relative to the middle cylinder 21 through a steel ball lock 22. The middle barrel component 2 is coaxially arranged in the cavity of the outer barrel component 1, and can realize retraction or extension movement relative to the outer barrel 11. The pull cylinder assembly 4 is coaxially arranged on the periphery of the joint of the outer cylinder assembly 1 and the middle cylinder assembly 2, and is connected with and disconnected from the middle cylinder 21 through an electromagnetic clutch. The middle barrel component 2 and the inner barrel component 3 which is locked and connected with the middle barrel component through the steel ball lock 22 do retraction movement relative to the outer barrel component 4 together, so that the compression-resistant buffering function is realized; the middle barrel component 3 and the inner barrel component 3 which is locked and connected with the middle barrel component 3 through the steel ball lock 22 drive the pull barrel component 4 to do outward extending movement relative to the outer barrel component 1 together, and the tensile buffering function is achieved. Wherein, the energy-absorbing material resetting device in the outer cylinder component 1 and the energy-absorbing material resetting device in the pull cylinder component 4 can respectively realize the repeated use of the compression-resistant and tensile-resistant aluminum honeycomb 42.
The device of the invention can realize the repeated use of the pull/press bidirectional buffer, and the specific working process is as follows:
after a carrier rocket carrying the device disclosed by the invention is thrown off a fairing at a preset height, each landing buffering mechanical leg of the reusable soft landing device in a folded and locked state is unlocked in a way of initiating explosive devices and the like, at the moment, the inner cylinder 31 is in a compressed or stretched state, and the outer cylinder 21 is extended or retracted under the action of the restoring force of the inner cylinder return spring 33 until the steel ball lock 22 and the groove on the inner cylinder are matched and locked, and at the moment, the inner cylinder 31 and the middle cylinder 21 are fixedly connected into a whole.
When the device is carried for first landing buffering, the reusable passive energy-absorbing pull/press bidirectional buffer can absorb compression energy and can also absorb tension energy.
When compression energy absorption is carried out, the middle cylinder 21 compresses the compression-resistant aluminum honeycomb 13 to realize absorption of impact energy, at the moment, because the electromagnetic fixture block 24 is in a power-off expansion state, as shown in fig. 3, the electromagnetic fixture block 24 comprises an electromagnetic fixture block clamping ring 241 and electromagnetic fixture block movable blocks 242 which are circumferentially and uniformly distributed on the electromagnetic fixture block clamping ring 241, and a leaf spring or a torsion spring is arranged between the electromagnetic fixture block clamping ring 241 and the electromagnetic fixture block movable blocks 22. When the electromagnetic latch 24 is in the power-off state, the electromagnetic latch movable block 242 is in a naturally expanded state under the action of the leaf spring or the torsion spring, and at this time, the outer contour of the electromagnetic latch is enveloped in a circular shape. The outer diameter of the electromagnetic fixture block 24 is larger than the small caliber 411 of the end part of the slide, and smaller than the large caliber 412 of the end part of the slide. Therefore, when the retraction movement of the middle cylinder 21 relative to the outer cylinder 11 does not drive the pull cylinder 41 to move together, that is, at this time, the tensile aluminum honeycomb 42 does not participate in the buffering and energy absorption;
when stretching and energy absorbing are carried out, because the electromagnetic fixture block 24 is in a power-off expansion state, the outer contour of the electromagnetic fixture block is enveloped in a circular shape) is larger than the small caliber 411 of the end part of the pull cylinder and smaller than the large caliber 412 of the end part of the pull cylinder. Therefore, when the extension movement of the middle cylinder 21 relative to the outer cylinder 11 will drive the pulling cylinder 41 to move together, the pulling cylinder flange compresses the tensile aluminum honeycomb 42, that is, the tensile aluminum honeycomb 42 participates in the energy absorption.
After the first landing buffering is finished, the device provided by the invention is used for adjusting the posture of the main body and realizing the launching on the surface of the outer star body, and in the process, the electromagnetic fixture block 24 is in an electrified contraction state. In the energized state, the electromagnetic latch moving block 242 made of a ferrous material is in a contracted state by a magnetic attraction of the electromagnetic coil installed in the electromagnetic latch snap ring 241. The enveloping outer diameter of the electromagnetic fixture block 24 is smaller than the small caliber 411 of the end of the pull cylinder, and at this time, the extending or retracting movement of the middle cylinder 21 relative to the outer cylinder 11 will not be affected by the pull cylinder 41.
After the device provided by the invention is launched on the surface of the outer star body to take off, the middle cylinder 21 is reset to the initial position under the action of the restoring force of the middle cylinder restoring spring 23, namely the middle cylinder restoring spring 23 is at the position of natural length, at the moment, the tensile aluminum honeycomb bracket firer bolt 45 is electrified and exploded to release the position locking of the tensile aluminum honeycomb bracket 43 relative to the outer cylinder 11, under the action of the restoring force of the tensile aluminum honeycomb bracket restoring pressure spring 44 in a compressed state, the tensile aluminum honeycomb bracket 43 slides along the outer wall of the outer cylinder 11, and the tensile aluminum honeycomb 42 pushes the pull cylinder 41 to do the resetting movement relative to the outer cylinder 11 until the pull cylinder end with the small caliber 411 and the large caliber 412 of the pull cylinder end is contacted with the flange-mounted flange at the end of the outer cylinder 11; at the moment, the electromagnetic fixture block 24 which is in the power-on state and is positioned below the steel ball lock 22 at the end part of the middle cylinder 21 is powered off, the enveloping outer diameter of the electromagnetic fixture block 24 is larger than the small caliber 411 of the end part of the pull cylinder and smaller than the large caliber 412 of the end part of the pull cylinder, and the one-way connection between the middle cylinder 21 and the pull cylinder 41 is realized again; at this time, the aluminum honeycomb bracket firer bolt 16 is electrically exploded to release the position lock of the aluminum honeycomb bracket 12 with respect to the outer cylinder 11, and the aluminum honeycomb bracket 12 slides along the inner wall of the outer cylinder 11 until the top of the aluminum honeycomb 13 comes into contact with the bottom of the truncated cone end of the middle cylinder 21 by the restoring force of the compressed aluminum honeycomb bracket restoring compression spring 14.
The above realizes the resetting of the reusable passive energy-absorbing pull/press bidirectional buffer.
When the reusable soft landing device is loaded for secondary landing buffering, the reusable passive energy-absorbing pull/press bidirectional buffer can perform compression energy absorption and can also perform tension energy absorption;
when compression energy absorption or tensile energy absorption is carried out, the reverse sliding of the compression-resistant aluminum honeycomb bracket 12 or the tensile aluminum honeycomb bracket 43 relative to the outer cylinder 11 is limited by the ratchet mechanism 15 on the outer wall of the outer cylinder 11 and the ratchet grooves on the compression-resistant aluminum honeycomb bracket 12 or the tensile aluminum honeycomb bracket 43 respectively; the tight engagement between the ratchet mechanism 15 on the outer wall of the outer cylinder 11 and the ratchet grooves on the compression-resistant aluminum honeycomb bracket 12 or the tensile-resistant aluminum honeycomb bracket 43 is realized by a leaf spring or a torsion spring on each ratchet; the stiffness coefficients of the compression-resistant aluminum honeycomb bracket return compression spring 14 and the tensile-resistant aluminum honeycomb bracket return compression spring 44 are much smaller than that of the middle barrel return spring 23. The reusable passive energy-absorbing pull/press bidirectional buffer can realize the two-time landing buffering of the soft landing device on the surface of an outer star body.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the present invention, and these modifications should also be construed as the protection scope of the present invention.
Claims (7)
1. A reusable passive energy-absorbing pull/press bidirectional buffer comprises an outer barrel component (1), a middle barrel component (2) coaxially arranged in the outer barrel component (1), an inner barrel component (3) coaxially arranged in the middle barrel component (2) and a pull barrel component (4) coaxially arranged at the periphery of the joint of the outer barrel component (1) and the middle barrel component (2);
the outer barrel component (1) comprises an outer barrel (11), and a compression-resistant aluminum honeycomb bracket reset compression spring (14) and a compression-resistant aluminum honeycomb bracket (12) are sequentially arranged in the outer barrel (11) from the bottom to the top; the compression-resistant aluminum honeycomb bracket (12) is internally provided with compression-resistant aluminum honeycombs (13); the upper part and the lower part of the outer wall of the outer barrel (11) are respectively and uniformly distributed with a plurality of groups of ratchet mechanisms (15) along the circumferential direction;
the pull cylinder component (4) comprises a pull cylinder (41), a tensile aluminum honeycomb bracket (43) is coaxially arranged in the pull cylinder (41), one end of the tensile aluminum honeycomb bracket (43) is provided with an annular flange, and the outer diameter of one end provided with the annular flange and the inner diameter of the cylinder body of the pull cylinder (41) form clearance fit; the outer diameter of the other end of the tensile aluminum honeycomb bracket (43) is in clearance fit with the inner diameter of a flange at the top of the pull cylinder (41); between the annular flange of the tensile aluminum honeycomb bracket (43) and a tensile aluminum honeycomb bracket retaining ring (46) arranged on the outer wall of the outer cylinder (11), the tensile aluminum honeycomb bracket (43) and the outer cylinder (11) are fixedly connected through a plurality of tensile aluminum honeycomb bracket unlocking fire bolts (45) uniformly distributed on the annular flange of the tensile aluminum honeycomb bracket (43) along the circumferential direction;
a tensile aluminum honeycomb (42) is arranged in an annular cavity between the inner wall of the pull cylinder (41) and the tensile aluminum honeycomb bracket (43); a tensile aluminum honeycomb bracket reset pressure spring (44) is arranged in an annular cavity between the inner wall of the pull cylinder (41) and the outer wall of the outer cylinder (11);
the upper end of the pull cylinder (41) is provided with a hole which is of a double-layer structure with two different calibers, namely a pull cylinder end part large caliber (412) and a pull cylinder end part small caliber (411).
2. The reusable passive energy absorbing pull/push bi-directional buffer as claimed in claim 1, wherein said middle tube assembly (2) comprises a middle tube (21) coaxially installed inside the outer tube (11), one end of said middle tube (21) is in the shape of a truncated cone, and the outer diameter of the truncated cone and the inner diameter of the tube body of the compression-resistant aluminum honeycomb bracket (12) form a clearance fit; the other end of the middle cylinder (21) is provided with a steel ball lock (22);
an annular baffle is arranged on the inner wall of the outer cylinder (11), and a middle cylinder return spring (23) is arranged between the circular truncated cone shape at one end of the middle cylinder (21) and the annular baffle.
3. The reusable passive energy-absorbing pull/press bi-directional bumper as claimed in claim 2, wherein the middle cylinder assembly (2) further comprises an electromagnetic block (24), and the electromagnetic block (24) is located at the connection position of the middle cylinder (21) and the pull cylinder assembly (4); the electromagnetic fixture block (24) and the middle cylinder (21) are axially fixed.
4. The reusable passive energy-absorbing pull/press bidirectional buffer according to claim 3, wherein the electromagnetic fixture block (24) comprises an electromagnetic fixture block snap ring (241), and electromagnetic fixture block movable blocks (242) circumferentially and uniformly distributed on the electromagnetic fixture block snap ring (241);
when the electromagnetic fixture block (24) is in a power-off state, the electromagnetic fixture block movable block (242) is in a natural expansion state, and the large caliber (412) of the end part of the pull cylinder is larger than the outer diameter of the electromagnetic fixture block (24) after the power-off state; the small caliber (411) of the end part of the pull cylinder is smaller than the outer diameter of the electromagnetic fixture block after power failure;
when the electromagnetic fixture block (24) is electrified, the electromagnetic fixture block movable block (242) contracts, and the outer diameter of the electrified electromagnetic fixture block (24) is smaller than the small caliber (411) of the end part of the pull cylinder.
5. The reusable passive energy-absorbing pull/press bidirectional buffer as claimed in claim 1, wherein the inner cylinder assembly (3) comprises an inner cylinder (31), an inner cylinder return spring (33) is arranged on the outer wall of the inner cylinder (31), one end of the inner cylinder return spring (33) is connected with the outer end face of the steel ball lock (22) of the middle cylinder, and the other end is connected with the inner end face of the flange of the inner cylinder (31); the top of the inner cylinder (31) is provided with an inner cylinder top spherical hinge (32); the outer wall of the inner cylinder (31) is provided with an annular groove which is matched with the steel ball lock (22).
6. The reusable passive energy-absorbing tension/compression bidirectional buffer as claimed in claim 1, wherein in the outer cylinder assembly (1), the inner diameter of the coaxial fitting portion of the compression-resistant aluminum honeycomb bracket (12) is larger than that of the coaxial fitting portion of the return compression spring (14) of the compression-resistant aluminum honeycomb bracket, so that an annular step is formed on the inner wall of the outer cylinder (11), the bottom of the outer wall of the compression-resistant aluminum honeycomb bracket (12) is fitted with the annular step on the inner wall of the outer cylinder (11), and the compression-resistant aluminum honeycomb bracket (12) and the outer cylinder (11) are fastened and connected by unlocking the firer bolts (16) through a plurality of compression-resistant aluminum honeycomb brackets which are circumferentially and uniformly distributed at the bottom of the compression-resistant aluminum honeycomb bracket (12).
7. The reusable passive energy-absorbing tension/compression bi-directional buffer as claimed in claim 1, wherein the inner wall of the tension-resistant aluminum honeycomb bracket (43) and the outer wall of the compression-resistant aluminum honeycomb bracket (12) are both provided with ratchet grooves, and the ratchet grooves are matched with the ratchet mechanism (15); each ratchet in the ratchet mechanism (15) is kept tightly engaged with the ratchet groove under the action of the spring piece or the torsion spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811358986.4A CN109307032B (en) | 2018-11-15 | 2018-11-15 | Repeatedly usable's passive energy-absorbing draws/presses two-way buffer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811358986.4A CN109307032B (en) | 2018-11-15 | 2018-11-15 | Repeatedly usable's passive energy-absorbing draws/presses two-way buffer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109307032A CN109307032A (en) | 2019-02-05 |
| CN109307032B true CN109307032B (en) | 2020-04-24 |
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| CN201811358986.4A Active CN109307032B (en) | 2018-11-15 | 2018-11-15 | Repeatedly usable's passive energy-absorbing draws/presses two-way buffer |
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| CN110886809B (en) * | 2019-10-21 | 2021-02-19 | 南京航空航天大学 | Energy absorption/drive integrated electromagnetic buffer capable of realizing compliant falling shock |
| CN111891409B (en) * | 2020-06-28 | 2022-04-12 | 北京控制工程研究所 | Rigid-flexible dual-mode reusable landing buffer device |
| CN112027119B (en) * | 2020-08-10 | 2022-05-24 | 北京宇航系统工程研究所 | Reusable rocket landing leg collapse energy-absorbing bidirectional buffer |
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| US3883127A (en) * | 1972-04-22 | 1975-05-13 | Krupp Gmbh | Buffer having a buffer body of foamed synthetic material |
| US6581919B2 (en) * | 2001-08-20 | 2003-06-24 | Eko Sport, Inc. | Shock absorbing seat post |
| CN103935525B (en) * | 2014-04-24 | 2016-01-20 | 南京航空航天大学 | The buffering landing leg of Control System for Reusable Launch Vehicle and way to play for time thereof |
| CN106704433B (en) * | 2017-01-12 | 2019-05-14 | 南京航空航天大学 | A kind of bidirectional buffer with driving function |
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