A composite expansion tube type cushioning landing device

Abstract

The present invention proposes a composite expansion tube type cushioned landing device, which belongs to the technical field of cushioned landing. It solves the problem that the existing cushioned landing cannot take into account the impact of different loads. It includes an expansion tube, a center tube and a cushioned connecting rod, the upper end of the cushioned connecting rod is connected to an external device, and the lower end is connected to a mounting seat, the lower end of the mounting seat is connected to an impact cone head, the center tube is slidably connected in the mounting seat, a positioning mechanism is provided at the lower part of the center tube, the outer side of the positioning mechanism is connected to the expansion tube, the impact cone head is located on the inner side of the expansion tube, and a plurality of composite material energy-absorbing rings are provided between the expansion tube and the center tube. It is mainly used for cushioned landing.

Description

Technical Field

[0001] The invention belongs to the technical field of cushioned landing, and in particular relates to a composite expansion tube type cushioned landing device. Background Art

[0002] When spacecraft, robots, special equipment airdrops or high-end precision instruments return to the ground from the air, the impact force they are subjected to has a great impact on the equipment and personnel. In severe cases, it can directly damage the electronic equipment and affect the health of the personnel. Therefore, in order to ensure the safe return of airdropped or returning spacecraft, landing cushioning plays a vital role. Especially in the space environment, the smooth and safe landing of equipment is particularly important for scientific research. That is, it is necessary to ensure the reliability of the equipment's smooth landing device and to ensure that the impact load on the equipment is as small as possible, while also ensuring the equipment's carrying capacity.

[0003] At present, the main buffer devices include airbag buffer devices, compressible energy absorbers, gas pressure buffers, hydraulic buffer devices, magnetorheological buffer devices, electromagnetic damping buffer devices and mechanical spring buffer devices, etc. There are flexible buffer devices and rigid buffer devices. For the large-volume bearing capacity requirements, flexible buffer devices are not easy to meet the requirements. For small load impact, rigid buffer devices cannot provide buffering force for the equipment in time. Therefore, it is necessary to design a device that can ensure the bearing capacity of the equipment and ensure the smooth landing buffer of the equipment. Summary of the invention

[0004] In view of this, the present invention aims to propose a composite expansion tube type cushioning landing device to solve the problem that the existing cushioning landing cannot take into account the impact of different loads.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a composite expansion tube type buffer landing device, which includes an expansion tube, a center tube and a buffer connecting rod, the upper end of the buffer connecting rod is connected to an external device, and the lower end is connected to a mounting seat, the lower end of the mounting seat is connected to an impact cone head, the center tube is slidably connected in the mounting seat, a positioning mechanism is arranged at the lower part of the center tube, the outer side of the positioning mechanism is connected to the expansion tube, the impact cone head is located on the inner side of the expansion tube, and a plurality of composite material energy-absorbing rings are arranged between the expansion tube and the center tube.

[0006] Furthermore, the positioning mechanism includes a positioning seat and a clamping seat, the clamping seat is connected to the central tube, the upper part of the clamping seat is connected to the positioning seat, and the expansion tube is connected to the positioning seat.

[0007] Furthermore, the inner side of the upper end of the expansion tube is threadedly connected to the limiting ring.

[0008] Furthermore, a positioning step is provided on the central tube, and the clamping seat is threadedly connected to the central tube and is positioned by the positioning step.

[0009] Furthermore, the positioning seat is provided with a positioning notch, and the expansion tube is installed in the positioning notch.

[0010] Furthermore, a limiting boss is provided on the mounting seat, and the limiting ring cooperates with the limiting boss in a limiting manner.

[0011] Furthermore, the expansion tube is a variable diameter structure, and the impact cone head is located at the large diameter end of the expansion tube.

[0012] Furthermore, a notch is provided on one side of the central tube.

[0013] Furthermore, the buffer connecting rod is threadedly connected to the mounting seat.

[0014] Furthermore, the mounting seat is threadedly connected to the impact cone head.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention proposes a composite expansion tube type cushioning landing device, which can realize the cushioning device through the deformation cushioning of the composite material energy absorbing ring of the cushioning landing device and the deformation energy absorption after the expansion of the expansion tube, so that the cushioning device can realize the cushioning energy absorption through the elastic deformation cushioning of the composite material energy absorbing ring during small impacts, and can also realize that when subjected to a large impact load, when the deformation of the composite material energy absorbing ring cannot absorb most of the impact energy, the impact of the collision cone head and the expansion tube can cause the expansion tube to deform and expand to absorb energy, thereby realizing the function of the cushioning landing of the present invention.

[0016] The composite expansion tube type cushioned landing device proposed in the present invention has a combination of flexible and rigid cushioning models, which can ensure that the vibration and impact caused by small impacts on the spacecraft or airdrop equipment are completely buffered and offset, and can also ensure that the protected equipment can be safely protected by cushioned landing when there is a large load.

[0017] When the center tube of the cushioning landing device is impacted by a load, the entire structure moves into the tube, and the impact cone head can preferentially absorb energy through the elastic deformation of the composite material energy-absorbing ring. When the impact is small, the buffering force is small, and the impact force can be eliminated by the deformation of the composite material energy-absorbing ring alone. When the impact force is large, when the impact cone head compresses the composite material energy-absorbing ring and moves to the expansion tube, the impact force is not eliminated at this time, and the cushioning landing device absorbs energy through the deformation of the impact cone head and the expansion tube, and the further compression deformation of the composite material energy-absorbing ring, thereby achieving the device's anti-impact protection performance.

[0018] The present invention can ensure the bearing capacity of the equipment and buffer the impact force through elastic and rigid deformation. When the impact force is small, the elastic deformation is a damage-free structure. The structure has good repeatability and can ensure the smooth landing buffering of the equipment to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 This is a schematic structural diagram of a composite expansion tube type cushioning landing device according to the present invention;

[0021] Figure 2 This is a schematic diagram of the cross-sectional structure of a composite expansion tube type cushioning landing device according to the present invention;

[0022] Figure 3 The present invention is a schematic diagram of the cross-sectional structure of a composite expansion tube type cushioning landing device in operation.

[0023] 1-mounting seat, 2-impact cone head, 3-expansion tube, 4-positioning seat, 5-center tube, 6-clamping seat, 7-buffer connecting rod, 8-composite material energy absorbing ring, 9-limiting ring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely explain the technical solutions in the embodiments of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict, and the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0025] See also Figure 1-3 The present embodiment is described as a composite expansion tube type cushioning landing device, which includes an expansion tube 3, a center tube 5 and a cushioning connecting rod 7. The upper end of the cushioning connecting rod 7 is connected to an external device, and the lower end is connected to a mounting seat 1. The lower end of the mounting seat 1 is connected to an impact cone head 2. The center tube 5 is slidably connected in the mounting seat 1. A positioning mechanism is provided at the lower part of the center tube 5. The outer side of the positioning mechanism is connected to the expansion tube 3. The impact cone head 2 is located on the inner side of the expansion tube 3. A plurality of composite material energy absorbing rings 8 are provided between the expansion tube 3 and the center tube 5.

[0026] When the center tube 5 of the buffer landing device is impacted by a load, the center tube 5 transfers the load force inwards. First, the center tube 5 moves upwards. Since the upper end of the buffer connecting rod 7 is connected to the external device and is in a relatively static state, the center tube 5 drives the expansion tube 3 to move upwards. At this time, the internal composite material energy-absorbing ring 8 is squeezed and deformed by the positioning mechanism and the impact cone head 2, and part of the impact energy is consumed at this time. When the impact force on the center tube 5 is small, the impact force can be offset by the composite material energy-absorbing ring 8 alone. If the impact force is large, when the center tube 5 drives the expansion tube 3 to move upwards, the impact cone head 2 contacts the expansion tube 3. At this time, the impact cone head 2 squeezes the expansion tube 3, causing the expansion tube 3 to expand by metal plastic deformation and absorb most of the impact energy. In this process, the composite material energy-absorbing ring 8 is still squeezed and deformed to play an efficient energy-absorbing role. After a large amount of impact buffering force is absorbed, the buffer landing device rebounds under the elastic force of the composite material energy-absorbing ring 8 and returns to the initial state. At this time, it can still play a buffering role.

[0027] In this embodiment, the positioning mechanism includes a positioning seat 4 and a clamping seat 6, the clamping seat 6 is connected to the center tube 5, the upper part of the clamping seat 6 is connected to the positioning seat 4, the expansion tube 3 is connected to the positioning seat 4, the center tube 5 is provided with a positioning step, the clamping seat 6 is threadedly connected to the center tube 5 and is positioned by the positioning step, the positioning seat 4 is provided with a positioning notch, the expansion tube 3 is installed in the positioning notch, the lower part of the composite material energy absorbing ring 8 is in contact with the positioning seat 4, and the upper end is in contact with the impact cone head 2, and the composite material energy absorbing ring 8 is extruded by the positioning seat 4 and the impact cone head 2.

[0028] The inner side of the upper end of the expansion tube 3 is threadedly connected with the limiting ring 9, and the mounting seat 1 is provided with a limiting boss. The limiting ring 9 is limitedly matched with the limiting boss, and the limiting ring 9 is used to clamp the mounting seat 1 to limit the mounting seat 1. The composite material energy absorbing ring 8 is installed between the expansion tube 3 and the center tube 5 in a free state, and the composite material energy absorbing ring 8 is compressed by tightening the limiting ring 9 after the installation is completed.

[0029] The buffer connecting rod 7 is threadedly connected to the mounting seat 1, the mounting seat 1 is threadedly connected to the impact cone head 2, the expansion tube 3 is a variable diameter structure, and the impact cone head 2 is located at the large diameter end of the expansion tube 3. In the initial state, there is a certain distance between the impact cone head 2 and the end surface of the small diameter end of the expansion tube 3, and a certain space is reserved for the compression of the composite material energy absorption ring 8.

[0030] A notch is provided on one side of the central tube 5 to ensure that the movement of the impact cone head 2 and the central tube 5 remains within one cross section and does not rotate. The composite material energy absorbing ring 8 is placed in the internal cavity in a free state and can be repeatedly squeezed and deformed.

[0031] In the embodiment, the upper end of the buffer connecting rod 7 is connected to the aircraft and the airdrop equipment, etc. When the central tube 5 is subjected to an external impact load, the load force is first transmitted inward, and the central tube 5 moves upward. At this time, since the upper part is relatively stationary for the equipment and the aircraft, the central tube 5 drives the parts fixedly connected thereto to move, including the positioning seat 4, the clamping seat 6 and the expansion tube 3, and drives them to move upward together. At this time, the internal composite material energy-absorbing ring 8 is squeezed by the positioning seat 4 at the bottom of the expansion tube and is compressed and deformed, consuming part of the impact energy. When the impact force received by the central tube 5 is small, the impact force can be offset by the composite material energy-absorbing ring 8 alone.

[0032] If the impact force is large, the center tube 5 drives its fixing parts to continue to move, and the impact cone head 2 contacts the expansion tube 3. At this time, the impact cone head 2 squeezes the expansion tube 3, causing the expansion tube 3 to expand by metal plastic deformation, thereby absorbing most of the impact energy. In this process, the composite material energy-absorbing ring 8 is still squeezed and deformed to play a highly efficient energy-absorbing role.

[0033] After a large amount of impact buffering force is absorbed, the device rebounds under the elastic force of the composite material energy-absorbing ring 8 and returns to its original state. At this time, it can still play a buffering role and can be applied to scenes of repeated applications such as robot legs.

[0034] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well.

Claims

1. A composite expansion tube type cushioning landing device, characterized in that: It comprises an expansion tube (3), a center tube (5) and a buffer connecting rod (7), wherein the upper end of the buffer connecting rod (7) is connected to an external device, and the lower end is connected to a mounting seat (1), the lower end of the mounting seat (1) is connected to an impact cone head (2), the center tube (5) is slidably connected in the mounting seat (1), a positioning mechanism is provided at the lower part of the center tube (5), the outer side of the positioning mechanism is connected to the expansion tube (3), the impact cone head (2) is located on the inner side of the expansion tube (3), and the expansion tube (3) and the center tube (5) are interposed between the impact cone head (2) and the center tube (5). A plurality of composite material energy absorbing rings (8) are provided, the positioning mechanism comprises a positioning seat (4) and a clamping seat (6), the clamping seat (6) is connected to the center tube (5), the upper part of the clamping seat (6) is connected to the positioning seat (4), the expansion tube (3) is connected to the positioning seat (4), the expansion tube (3) is a variable diameter structure, the impact cone head (2) is located at the large diameter end of the expansion tube (3), the inner side of the upper end of the expansion tube (3) is threadedly connected to the limit ring (9), the center tube (5) is provided with a positioning step, the clamping seat (6) The center tube (5) is threadedly connected and positioned via a positioning step. The positioning seat (4) is provided with a positioning notch. The expansion tube (3) is installed in the positioning notch. A limiting boss is provided on the mounting seat (1). The limiting ring (9) cooperates with the limiting boss. The positioning seat (4) and the impact cone head (2) realize the extrusion of the composite material energy absorption ring (8). In the initial state, there is a distance between the impact cone head (2) and the end face of the small diameter of the expansion tube (3), so as to reserve a space for the compression of the composite material energy absorption ring (8). The composite expansion tube type cushioning landing device can achieve the function of cushioning landing by elastically deforming the composite material energy absorbing ring (8) and absorbing energy by deforming the composite material energy absorbing ring (8) after expansion, and can also achieve the function of cushioning landing by deforming and expanding the expansion tube (3) to absorb energy when a small impact occurs, and can also achieve the function of cushioning landing by deforming and expanding the expansion tube (3) to absorb energy when a large impact load is applied and the composite material energy absorbing ring (8) is unable to absorb most of the impact energy by deformation, through the impact of the collision cone head (2) and the expansion tube (3).

2. The composite expansion tube type cushioning landing device according to claim 1, characterized in that: A notch is provided on one side of the central tube (5).

3. The composite expansion tube type cushioning landing device according to claim 1, characterized in that: The buffer connecting rod (7) is threadedly connected to the mounting seat (1).

4. The composite expansion tube type cushioning landing device according to claim 1, characterized in that: The mounting seat (1) is threadedly connected to the impact cone head (2).

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