Sectional type buffer device of vertical soft landing equipment
Through the combination of friction and yield energy-consuming units of the segmented buffer device, the problems of low buffer efficiency and poor reliability of vertical soft landing equipment are solved, and a smooth increase in buffering force and safe and reliable vertical soft landing are achieved.
Patent Information
- Application Number
- CN202510836841.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-22
- Publication Date
- 2025-08-15
AI Technical Summary
The buffering system of existing vertical soft landing equipment has problems of low efficiency and poor reliability in terms of instantaneous impact load and complex residual kinetic energy dissipation. In particular, traditional single-stage energy-absorbing structures are prone to cause peak impact overload and high maintenance costs of hydraulic systems.
The segmented buffering device is adopted, including a friction buffer energy consumption unit, a yield energy consumption unit and a load-bearing force transmission unit. Through the contact between the friction moving sleeve and the friction disc and the deformation energy consumption of the yield energy consumption unit, combined with the torsion and yield of the multi-directional rotating assembly and the deformation energy consumption part, multi-stage buffer energy consumption is achieved.
The buffering force is increased smoothly, the safety and reliability of vertical soft landing equipment is improved, the risk of damage to load-bearing components is reduced, and the structure is simple and the space occupies small.
Smart Images
Figure CN120482389A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of vertical equipment buffering, and in particular to a segmented buffering device for vertical soft landing equipment. Background Art
[0002] With the rapid development of aerospace technology, vertical soft landing recovery has become an important research direction in the aerospace field due to its economy and reusability. During the landing process of vertical soft landing equipment, the dissipation of instantaneous huge impact loads and complex horizontal residual kinetic energy is a core challenge. The buffer system of vertical soft landing equipment must meet the stringent requirements of efficient energy absorption, lightweight and high reliability. Traditional buffer devices mostly use a single-stage energy absorption structure, which has the following technical problems: the problem of sudden change in buffering force. The single-stage energy-absorbing structure is prone to impact peaks at the moment of touching the ground, resulting in the risk of overload of the landing platform. Although it can partially alleviate the impact, relying on a single energy dissipation mode leads to limited energy dissipation capacity when the impact load is instantaneously overloaded, and it is impossible to achieve a reliable soft landing of vertical soft landing equipment. In addition, the buffer structure using a hydraulic system relies on the flow control of the liquid medium during the buffering process, and has extremely high requirements for sealing and medium stability, and has high maintenance costs. Summary of the Invention
[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a segmented buffer device for vertical soft landing equipment that achieves effective buffering energy consumption and has a simple structure and high safety and reliability.
[0004] In order to solve the above technical problems, the technical solution proposed by the present invention is: The segmented buffer device of the vertical soft landing equipment includes a soft landing platform and multiple deformable buffer components arranged between the soft landing platform and the ground. The deformable buffer components include a friction buffer energy absorption unit, a yield energy absorption unit and a load-bearing force transmission unit, wherein the load-bearing force transmission unit includes a load-bearing cylinder connected to the bottom end of the soft landing platform and a force transmission guide rod arranged in the load-bearing cylinder; the friction buffer energy absorption unit includes a friction movable sleeve drivingly connected to the load-bearing cylinder, a friction disk located at the bottom of the friction movable sleeve and a deformable energy absorption part connected to the bottom end of the friction disk; the friction movable sleeve and the friction disk sleeve are movably arranged on the force transmission guide rod and are in contact and friction when the soft landing platform is loaded; the yield energy absorption unit is arranged on the lower side of the friction disk, and the yield energy absorption unit deforms and absorbs energy when the friction disk moves downward and contacts.
[0005] The yield energy dissipation unit includes an axially movable sleeve and a supporting yield energy dissipation part connected to the bottom of the axially movable sleeve. The axially movable sleeve is located at the bottom of the friction disk. The supporting yield energy dissipation part is a yield steel energy dissipation part. The yield steel energy dissipation part deforms and dissipates energy when the axially movable sleeve contacts the friction disk.
[0006] The bottom end of the force transmission guide rod is provided with a multi-directional rotation component that can release the horizontal freedom when bearing load. The multi-directional rotation component includes a hinged ear plate and a joint bearing. The joint bearing is hinged to the ground through the ear plate. The joint bearing is arranged between the force transmission guide rod and the ear plate. The support yield energy absorption part plastically deforms when the force transmission guide rod rotates multi-directionally.
[0007] The supporting yielding energy absorbing member is an arc-shaped energy absorbing member, one end of which is mounted on the axial movable sleeve via a fastener, and the other end is fixed to the ground outside the axial movable sleeve; there are multiple arc-shaped energy absorbing members, and the multiple arc-shaped energy absorbing members are evenly distributed along the outer circumference of the axial movable sleeve.
[0008] The axially movable sleeve consists of a contact plate and a sliding sleeve. The contact plate is connected to the upper end of the sliding sleeve and contacts the friction disk when the friction buffer energy dissipation unit moves downward. The sliding sleeve is axially movably sleeved on the force transmission guide rod, and the support yield energy dissipation part is connected to the sliding sleeve.
[0009] The deformation energy absorbing parts are multiple vertically arranged deformation energy absorbing parts, which are evenly distributed along the circumference of the friction disk and consume energy by torsion when the friction movable sleeve contacts and rubs against the friction disk.
[0010] The deforming energy absorbing part is a soft steel energy absorbing part, and the strength of the soft steel energy absorbing part is lower than the strength of the supporting yielding energy absorbing part.
[0011] The friction movable sleeve is connected to the bearing cylinder through a force transmission sleeve, and a thrust bearing is provided between the force transmission sleeve and the bearing cylinder.
[0012] The friction moving sleeve includes a friction plate and a connecting sleeve that are connected to each other. The connecting sleeve is connected to the force transmission sleeve. The friction plate contacts the friction disc when moving downward.
[0013] The plurality of deformation buffer components are evenly distributed along the circumference of the soft landing platform.
[0014] Compared with the prior art, the advantages of the present invention are: The present invention provides a plurality of deformation buffer components between the soft landing platform and the ground. The deformation buffer components include a friction buffer energy dissipation unit, a yield energy dissipation unit and a load-bearing force transmission unit. The friction buffer energy dissipation unit includes a friction movable sleeve, a friction disc and a deformation energy dissipation part. The friction movable sleeve and the friction disc sleeve are movably arranged on the force transmission guide rod and contact and rub when the soft landing platform is loaded. The yield energy dissipation unit is arranged on the lower side of the friction disc. The yield energy dissipation unit deforms and dissipates energy when the friction disc moves downward and contacts. The overall layout is compact and occupies little space.
[0015] As the soft landing platform moves downward under the influence of the vertical soft landing equipment, the load-bearing force transmission unit moves downward under pressure, pushing the friction sleeve downward and into contact with the friction disc. Simultaneously, the deformable energy dissipation member connected to the friction disc's underside twists under the combined friction and downward force. This causes the deformable energy dissipation member to dissipate energy and achieve a vibration-damping effect through a combination of deflection and twisting as the friction disc moves downward. As the friction disc continues to move downward and contacts the yielding energy dissipation unit, further deformation and energy dissipation occur, providing greater cushioning force and further enhancing the buffering effect. Furthermore, throughout the entire energy dissipation process, the cushioning force increases from small to large, resulting in a stable, reliable, and safe buffering effect.
[0016] At the same time, when the device is subjected to excessive impact, large loads and large displacements may occur, which can easily lead to damage to load-bearing components (such as thrust bearings, etc.). The deformable energy-absorbing parts of the present invention can cut off by themselves in the above situation, thereby protecting the load-bearing components, thereby ensuring safe and reliable operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings, wherein: Figure 1 It is a schematic diagram of the three-dimensional structure of the segmented buffer device of the vertical soft landing equipment of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the deformation buffer component of the present invention; Figure 3 is a front view of the deformation buffer assembly of the present invention; Figure 4 yes Figure 3 A cross-sectional view of section AA; Figure 5 This is a front view of the deformation buffer assembly of the present invention from another direction; The numbers in the figure represent: 1. Soft landing platform; 2. Deformation buffer assembly; 21. Friction buffer energy dissipation unit; 211. Friction moving sleeve; 2111. Friction plate; 2112. Connecting sleeve; 212. Friction disc; 213. Deformation energy dissipation part; 22. Yield energy dissipation unit; 221. Axial moving sleeve; 2211. Contact plate; 2212. Sliding sleeve; 222. Support yield energy dissipation part; 23. Load-bearing force transmission unit; 231. Load-bearing cylinder; 232. Force transmission guide rod; 3. Force transmission sleeve; 4. Thrust bearing; 5. Multi-directional rotation assembly; 51. Articulated ear plate; 52. Spherical bearing. DETAILED DESCRIPTION
[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the scope of protection of the present invention is not limited thereby.
[0019] Figures 1 to 5 The present invention shows an embodiment of a segmented buffer device for vertical soft landing equipment. The vertical soft landing equipment can be a vertical take-off and landing aircraft, a rocket, or the like. In this embodiment, the segmented buffer device includes a soft landing platform 1 and multiple deformable buffer assemblies 2. The multiple deformable buffer assemblies 2 are distributed along the circumference of the soft landing platform 1. The deformable buffer assemblies 2 include a friction buffer energy dissipation unit 21, a yield energy dissipation unit 22, and a load-bearing force transmission unit 23. The load-bearing force transmission unit 23 includes a load-bearing cylinder 231 and a force transmission guide rod 232. The load-bearing cylinder 231 is connected to the bottom end of the soft landing platform 1. The force transmission guide rod 232 is disposed within the load-bearing cylinder 231. The load-bearing cylinder 231 is axially movable relative to the force transmission guide rod 232. The friction buffer energy dissipation unit 21 comprises a friction sleeve 211, a friction disc 212, and a deformable energy dissipation member 213. The friction sleeve 211 is drivingly connected to the support cylinder 231. The friction disc 212 is located below the friction sleeve 211. The friction sleeve 211 and the friction disc 212 are movably mounted on a force transmission guide rod 232 and engage in friction when the soft landing platform 1 is loaded. The deformable energy dissipation member 213 is connected between the bottom end of the friction disc 212 and the ground. The yield energy dissipation unit 22 is located below the friction disc 212 and yields energy when the friction disc 212 moves downward. Its overall layout is compact and occupies little space.
[0020] As the soft landing platform 1 moves downward under the action of the vertical soft landing equipment, the load-bearing force-transmitting unit 23 moves downward under pressure, pushing the friction sleeve 211 downward and into contact with the friction disc 212. The deformable energy-absorbing member 213 connected to the friction disc 212 twists under the friction force and downward force. This causes the deformable energy-absorbing member 213 to dissipate energy and buffer the downward movement of the friction disc 212 through deflection and twisting, achieving a buffering and vibration-reducing effect. As the friction disc 212 continues to move downward and contacts the yielding energy-absorbing unit 22, the yielding energy-absorbing unit 22 further deforms and dissipates energy, providing greater buffering force and further enhancing the buffering effect. Furthermore, throughout the entire energy dissipation process, the buffering force increases from small to large, resulting in a stable, reliable, and safe buffering effect.
[0021] At the same time, when the device is subjected to excessive impact, large loads and large displacements may occur, which may easily lead to damage to the load-bearing components (such as the thrust bearing 4, etc.). The deformable energy-absorbing part 213 of the present invention can be sheared off by itself in the above situation, thereby protecting the load-bearing components, thereby ensuring safe and reliable operation of the device.
[0022] It can be seen that the present invention adopts a combination of the friction buffer energy dissipation unit 21 and the yield energy dissipation unit 22 to achieve effective buffer energy dissipation of vertical soft landing equipment, and has a simple structure and high safety and reliability.
[0023] Furthermore, the yield energy dissipation unit 22 includes an axially movable sleeve 221 and a supporting yield energy dissipation member 222. The axially movable sleeve 221 is located at the bottom of the friction disc 212 and contacts the friction disc 212 as the friction disc 212 continues to move downward. The supporting yield energy dissipation member 222 is connected to the bottom of the axially movable sleeve 221, thereby deforming and dissipating energy when the axially movable sleeve 221 contacts the friction disc 212. In this embodiment, the supporting yield energy dissipation member 222 is a yield steel member. This member can deform and dissipate energy while providing a certain degree of support for the device, thereby further improving the buffering and energy dissipation effect, and its structure is simple.
[0024] Furthermore, a multi-directional rotation assembly 5 is provided at the bottom end of the force transmission guide rod 232. This assembly comprises a hinged lug 51 and a spherical bearing 52. The spherical bearing 52 is hinged to the ground via the hinged lug 51 and is positioned between the force transmission guide rod 232 and the lug. When loaded, the multi-directional rotation assembly 5 releases horizontal degrees of freedom and transmits force through the force transmission guide rod 232 and the support yielding energy dissipation member 222. The plastic deformation of the support yielding energy dissipation member 222 dissipates the energy of the horizontal load.
[0025] In this embodiment, the supporting yielding energy dissipation member 222 is an arc-shaped energy dissipation member. One end of the arc-shaped energy dissipation member is mounted to the axially movable sleeve 221 via fasteners, and the other end is fixed to the ground outside the axially movable sleeve 221. Furthermore, multiple arc-shaped energy dissipation members are evenly distributed along the circumference of the axially movable sleeve 221, ensuring a uniform distribution of deformation. This simple structure further ensures the reliability of the energy buffering provided by the yielding energy dissipation unit 22.
[0026] like Figure 4 As shown, the axially movable sleeve 221 consists of a contact plate 2211 and a sliding sleeve 2212. The contact plate 2211 is connected to the upper end of the sliding sleeve 2212 and contacts the friction disc 212 when the friction buffer energy dissipation unit 21 moves downward. The sliding sleeve 2212 is axially movable around the force transmission guide rod 232, and the supporting yield energy dissipation member 222 is connected to the sliding sleeve 2212. Its structure is simple and easy to disassemble and install. When excessive load and displacement cause the friction disc 212 to contact the yield energy dissipation unit 22, compression or grinding of the contact plate 2211 further protects load-bearing components (such as the thrust bearing 4). The contact plate 2211 can be made of a low-friction or strong plastic material.
[0027] In this embodiment, the deformable energy dissipation members 213 comprise multiple vertically arranged deformable energy dissipation members 213. These members are evenly distributed along the circumference of the friction disc 212 and dissipate energy by torsion when the friction sleeve 211 and the friction disc 212 come into contact and rub against each other. The deformable energy dissipation members 213 are slender rods that automatically shear off if the device is subjected to excessive impact, thereby protecting the load-bearing components.
[0028] In this embodiment, the deformation energy dissipation member 213 is a mild steel energy dissipation member, and the strength of the mild steel energy dissipation member is lower than the strength of the support yielding energy dissipation member 222. The mild steel energy dissipation member has a high deformation capacity, while the support yielding energy dissipation member 222 has a high load-bearing capacity and a certain deformation capacity, so that it can simultaneously provide bottom support, load-bearing capacity, and deformation capacity while dissipating deformation energy.
[0029] Preferably, the friction sleeve 211 is connected to the bearing cylinder 231 via the force transmission sleeve 3 , and a thrust bearing 4 is provided between the force transmission sleeve 3 and the bearing cylinder 231 , so that the force of the soft landing platform 1 can be effectively transmitted to the friction sleeve 211 .
[0030] In this embodiment, the friction moving sleeve 211 includes a friction plate 2111 and a connecting sleeve 2112, which are connected to each other. The connecting sleeve 2112 is connected to the force transmission sleeve 3. When the friction plate 2111 moves downward, it contacts the friction disc 212. The friction disc 212 has a friction surface that cooperates with the friction plate 2111. The layout is compact and easy to install.
[0031] While the present invention has been described with reference to preferred embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, the various technical features described in the various embodiments may be combined in any manner, provided no structural conflicts exist. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.
Claims
1. A segmented buffer device for vertical soft landing equipment, characterized in that: The invention comprises a soft landing platform and a plurality of deformation buffer components arranged between the soft landing platform and the ground. The deformation buffer components include a friction buffer energy absorbing unit, a yield energy absorbing unit and a load-bearing force transmission unit. The load-bearing force transmission unit includes a load-bearing cylinder connected to the bottom end of the soft landing platform and a force transmission guide rod arranged in the load-bearing cylinder. The friction buffer energy absorbing unit includes a friction movable sleeve drivingly connected to the load-bearing cylinder, a friction disk located below the friction movable sleeve and a deformation energy absorbing part connected to the bottom end of the friction disk. The friction movable sleeve and the friction disk sleeve are movably arranged on the force transmission guide rod and are in contact and friction when the soft landing platform is loaded. The yield energy absorbing unit is arranged on the lower side of the friction disk, and the yield energy absorbing unit deforms and consumes energy when the friction disk moves downward and contacts.
2. The segmented buffer device for vertical soft landing equipment according to claim 1, characterized in that: The yield energy dissipation unit includes an axially movable sleeve and a supporting yield energy dissipation part connected to the bottom of the axially movable sleeve. The axially movable sleeve is located at the bottom of the friction disk. The supporting yield energy dissipation part is a yield steel energy dissipation part. The yield steel energy dissipation part deforms and dissipates energy when the axially movable sleeve contacts the friction disk.
3. The segmented buffer device for vertical soft landing equipment according to claim 2, characterized in that: The bottom end of the force transmission guide rod is provided with a multi-directional rotation component that can release the horizontal freedom when bearing load. The multi-directional rotation component includes a hinged ear plate and a joint bearing. The joint bearing is hinged to the ground through the ear plate. The joint bearing is arranged between the force transmission guide rod and the ear plate. The support yield energy absorption part plastically deforms when the force transmission guide rod rotates multi-directionally.
4. The segmented buffer device for vertical soft landing equipment according to claim 2, characterized in that: The supporting yielding energy absorbing member is an arc-shaped energy absorbing member, one end of which is mounted on the axial movable sleeve via a fastener, and the other end is fixed to the ground outside the axial movable sleeve; there are multiple arc-shaped energy absorbing members, and the multiple arc-shaped energy absorbing members are evenly distributed along the outer circumference of the axial movable sleeve.
5. The segmented buffer device for vertical soft landing equipment according to claim 2, characterized in that: The axially movable sleeve consists of a contact plate and a sliding sleeve. The contact plate is connected to the upper end of the sliding sleeve and contacts the friction disk when the friction buffer energy dissipation unit moves downward. The sliding sleeve is axially movably sleeved on the force transmission guide rod, and the support yield energy dissipation part is connected to the sliding sleeve.
6. The segmented buffer device for vertical soft landing equipment according to any one of claims 1 to 5, characterized in that: The deformation energy absorbing parts are multiple vertically arranged deformation energy absorbing parts, which are evenly distributed along the circumference of the friction disk and consume energy by torsion when the friction movable sleeve contacts and rubs against the friction disk.
7. The segmented buffer device for vertical soft landing equipment according to claim 6, characterized in that: The deforming energy absorbing part is a soft steel energy absorbing part, and the strength of the soft steel energy absorbing part is lower than the strength of the supporting yielding energy absorbing part.
8. The segmented buffer device for vertical soft landing equipment according to claim 6, characterized in that: The friction movable sleeve is connected to the bearing cylinder through a force transmission sleeve, and a thrust bearing is provided between the force transmission sleeve and the bearing cylinder.
9. The segmented buffer device for vertical soft landing equipment according to claim 8, characterized in that: The friction moving sleeve includes a friction plate and a connecting sleeve that are connected to each other. The connecting sleeve is connected to the force transmission sleeve. When the friction plate moves downward, it contacts the friction disc.
10. The rocket landing segmented buffer device according to any one of claims 1 to 5, characterized in that: The plurality of deformation buffer components are evenly distributed along the circumference of the soft landing platform.