CN113090698A

CN113090698A - Damper, unmanned aerial vehicle foot rest and unmanned aerial vehicle

Info

Publication number: CN113090698A
Application number: CN202110327962.8A
Authority: CN
Inventors: 毛一年; 陆宏伟; 高焓; 刘璐; 王刚; 刘宝俊; 郜奥林; 马聪; 姜欣宏
Original assignee: Beijing Sankuai Online Technology Co Ltd
Current assignee: Beijing Sankuai Online Technology Co Ltd
Priority date: 2021-03-26
Filing date: 2021-03-26
Publication date: 2021-07-09
Anticipated expiration: 2041-03-26
Also published as: CN113090698B

Abstract

The utility model relates to a attenuator, unmanned aerial vehicle foot rest and unmanned aerial vehicle, the attenuator includes fixed part and the motion portion of barrel, fixed connection in the inside of barrel, and the motion portion includes: a slider configured to be axially movable inside the barrel; and an elastic member elastically abutting between the fixing portion and the slider, wherein a first space is formed inside the slider, and the slider has an orifice communicating the first space with an outside of the slider, and the slider is made at least partially of an elastic material so that gas of the first space is compressed and discharged through the orifice when moving toward the fixing portion. Therefore, when the damper is impacted by external collision, the sliding part moves axially towards the fixed part, the first space is compressed, gas in the first space is discharged outwards through the throttling hole, so that the collision impact is buffered by consuming energy, and after the collision is finished, the sliding part moves axially away from the fixed part under the restoring action of the elastic part to restore to the initial position.

Description

Damper, unmanned aerial vehicle foot rest and unmanned aerial vehicle

Technical Field

The utility model relates to a mechanical vibration technical field specifically, relates to a attenuator, unmanned aerial vehicle foot rest and unmanned aerial vehicle.

Background

The moving part of products such as robot, unmanned aerial vehicle need utilize the attenuator to come the bradyseism when receiving the impact, and unmanned aerial vehicle can carry out energy conversion and dissipation through hydraulic damper at the produced impact force of landing in-process foot rest and ground striking for example to prevent that the aircraft from beating and overturning at the landing in-process, improve the security of aircraft. The damper in the correlation technique can play better damping effect to the collision vibration, but entire system's transmission link is more, and the structure is complicated to reduced the reliability, increased the maintenance cost, also can not satisfy the lightweight design requirement that the unmanned aerial vehicle field was very regarded as important simultaneously.

Disclosure of Invention

The purpose of this disclosure is to provide a attenuator, dispose the unmanned aerial vehicle foot rest of this attenuator and dispose the unmanned aerial vehicle of this unmanned aerial vehicle foot rest to at least partly solve the problem that exists among the correlation technique.

In order to achieve the above object, the present disclosure provides a damper including:

a barrel;

the fixing part is fixedly connected inside the cylinder; and

a motion section comprising:

a slide configured to be axially movable inside the barrel; and

the elastic piece elastically props against between the fixed part and the sliding piece,

wherein a first space is formed inside the slider, and the slider has an orifice communicating the first space with an outside of the slider, and the slider is made at least partially of an elastic material so that gas of the first space is compressed and discharged through the orifice when moving toward the fixing portion.

Optionally, the sliding member includes a first sliding body and a second sliding body which are axially abutted and contacted to enclose the first space, wherein the elastic member is elastically abutted between the first sliding body and the fixing portion, and the first sliding body and/or the second sliding body is made of an elastic material.

Optionally, the surfaces of the first sliding body and the second sliding body, which are in contact with each other, are respectively formed with bowl-shaped structures facing each other, and are buckled to form the first space.

Optionally, the first slider and/or the second slider are in frictional contact with an inner wall of the cylinder.

Optionally, the first sliding body is fixedly connected with the second sliding body.

Optionally, the throttle hole is configured as a taper hole that tapers from the first space toward an outer diameter of the slider.

Optionally, a guide hole is formed in the fixing portion, the slider includes a damping structure which is in circumferential fitting contact with the inner wall of the cylinder, and a guide structure which extends from the damping structure to the fixing portion and is in sliding fit with the guide hole, and the elastic piece is elastically abutted between the damping structure and the fixing portion.

Optionally, the guide structure is configured as a cylinder coaxial with the barrel, an end face of a free end of the cylinder is formed with a through hole extending toward the damping structure, and the throttle hole is communicated with the through hole.

Optionally, the lateral wall cover of damping structure is equipped with the sealing washer, and passes through the sealing washer with the inner wall laminating contact of barrel.

Optionally, the elastic member is a compression spring, and the compression spring is sleeved outside the guide structure.

Optionally, the cylinder is configured as a semi-closed structure with an opening at one end and a bottom plate at the other end, and one end of the sliding piece far away from the fixed part penetrates through the bottom plate and extends to the outside of the cylinder.

Optionally, the end of the sliding member protruding out of the cylinder is configured as a tapered column coaxial with the cylinder, the tapered column being tapered in diameter in a direction away from the fixing portion.

Optionally, the end of the sliding part extending out of the cylinder is formed with a mounting hole for mounting a wear pad.

Optionally, the cylinder includes a first sleeve and a second sleeve detachably connected in an axial direction, the first sleeve is formed with a partition serving as the fixing portion, and the moving portion is located in a space formed by the partition and the second sleeve.

Optionally, the outer wall of the first sleeve is formed into a stepped shaft, a small diameter section of the stepped shaft is formed with an external thread, and an inner wall of the second sleeve close to the first sleeve is formed with an internal thread matched with the external thread.

According to a second aspect of the present disclosure, there is provided an unmanned aerial vehicle foot rest comprising a damper according to the above.

According to a third aspect of the present disclosure, there is provided a drone comprising a drone foot stand according to the above.

Through above-mentioned technical scheme, when the attenuator received external collision impact, the slider was towards fixed part axial motion, and first space is compressed, and its inside gas outwards discharges through the orifice to the energy consumption cushions the collision impact, and after the collision, the slider kept away from fixed part axial motion under the restoring action of elastic component, in order to resume to initial position. The damper is simple in structure, light in weight, low in cost, high in reliability and capable of achieving excellent buffering effect.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

FIG. 1 is a schematic view of an external structure of a damper provided in an exemplary embodiment of the present disclosure;

FIG. 2 is a cross-sectional view of a damper provided in an exemplary embodiment of the present disclosure;

FIG. 3 is an exploded view of a damper provided in accordance with an exemplary embodiment of the present disclosure;

FIG. 4 is a schematic structural view of a first sleeve in a damper provided in accordance with an exemplary embodiment of the present disclosure;

FIG. 5 is a schematic structural view of a second sleeve in a damper provided in accordance with an exemplary embodiment of the present disclosure;

FIG. 6 is a schematic view of a first slider in a damper according to an exemplary embodiment of the present disclosure;

FIG. 7 is a schematic view of a first slider in a damper according to another exemplary embodiment of the present disclosure;

fig. 8 is a schematic structural view of a second sliding body in a damper according to an exemplary embodiment of the present disclosure.

Description of the reference numerals

10-cylinder, 11-first sleeve, 12-second sleeve, 121-through hole, 20-stationary part, 21-pilot hole, 30-moving part, 301-first sliding body, 302-second sliding body, 31-sliding part, 311-first space, 312-orifice, 313-damping structure, 3131-first damping structure, 3132-second damping structure, 3133-first sealing groove, 3134-second sealing groove, 314-pilot structure, 315-via hole, 316-conical post, 317-mounting hole, 32-elastic part, 40-sealing ring, 41-first sealing ring, 42-second sealing ring.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, unless otherwise specified, terms of orientation such as "upper", "lower", "top" and "bottom" are used, which are defined based on the orientation shown in the drawings, and refer to the drawing direction shown in fig. 2; "inner" and "outer" refer to the inner and outer contours of the respective components. Furthermore, the terms "first," "second," and the like, as used in this disclosure, are intended to distinguish one element from another, and not necessarily for order or importance. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated.

Referring to fig. 1 to 3, the disclosed embodiment provides a damper including a cylinder 10, a fixed portion 20 fixedly connected to the inside of the cylinder 10, and a moving portion 30, the moving portion 30 being at least partially accommodated in the cylinder 10 and being capable of buffering a collision impact received by the damper by an axial movement inside the cylinder 10, thereby achieving a damping effect. As an embodiment, the moving part 30 may include a slider 31 and an elastic member 32. The slider 31 may be configured to be axially movable inside the barrel 10, which may directly or indirectly receive an external impact of collision. The elastic element 32 can elastically abut against between the fixed portion 20 and the sliding element 31, and can play a certain damping role by storing elastic potential energy when the sliding element 31 axially moves towards the fixed portion 20, and can simultaneously enable the sliding element 31 to axially move away from the fixed portion 20 by releasing the stored elastic potential energy so as to realize the resetting of the damper. That is, the movement of the slider 31 of the damper toward the fixed portion 20 is an operation thereof, and the external impact can be buffered. Wherein the slider 31 may be formed with a first space 311 inside thereof, and the slider 31 has an orifice 312 communicating the first space 311 with the outside of the slider 31, while the slider 31 may be made at least partially of an elastic material so as to be compressively deformed when moving toward the fixing portion 20, so that the gas of the first space 311 is compressed to be discharged through the orifice 312. It should be noted that, in order to enable the first space 311 to be compressed when the sliding member 31 moves axially towards the fixed portion 20, it is ensured that the wall of the cavity enclosing the first space 311 is at least partially made of an elastic material, so that the compression deformation of the first space 311 can be realized by virtue of the characteristic of the elastic material that is easily deformable. The elastic material can be a rubber material with certain compressibility, and the damper can be ensured to normally work within the range of-55 to 120 ℃ by selecting a proper rubber material, such as nitrile rubber. It should be further understood that the size of the orifice 312 is significantly smaller than the first space 311, and due to the existence of the orifice 312 and its own structural characteristics, the gas discharge process can be hindered, and energy can be dissipated to reduce vibration and buffer collision impact.

In addition, when the sliding member 31 moves axially towards the fixing portion 20, one side of the sliding member receives an external impact force towards the fixing portion 20, the other side of the sliding member receives an elastic abutting force away from the fixing portion 20, and the two directions of the external impact force and the elastic abutting force act on the first space 311 together oppositely, so that the first space 311 is easily compressed to generate a damping effect; when the sliding part 31 moves away from the fixing part 20 axially, only one side of the sliding part is subjected to the elastic acting force of the elastic part 32, and the first space 311 is not easy to compress or is not obviously compressed, so that the damper can also realize the effects that the damping of the moving part 30 is larger when the moving part moves axially towards the fixing part 20 and is smaller when the moving part moves axially away from the fixing part 20, namely, the moving part moves slowly towards the fixing part 20 and moves fast when the moving part moves away from the fixing part 20, and further, the difference of the reciprocating speed is realized, so that the better buffering effect and the fast rebound effect of the damper can be simultaneously met.

Through the technical scheme, when the damper is subjected to external collision impact, the sliding part 31 axially moves towards the fixing part 20, the first space 311 is compressed, gas in the first space is exhausted outwards through the throttling hole 312, so that energy is consumed to buffer the collision impact, and after the collision is finished, the sliding part 31 axially moves away from the fixing part 20 under the restoring action of the elastic part 32 to restore to the initial position. The damper is simple in structure, light in weight, low in cost, high in reliability and capable of achieving excellent buffering effect.

The present disclosure does not limit the structural form of the slider 31, and for example, the slider may be configured as an integral structure or as a separate structure as described below. Here, as an embodiment, referring to fig. 2, the sliding member 31 may include a first sliding body 301 and a second sliding body 302 that are in axial abutting contact to enclose the first space 311, that is, a cavity wall where the first space 311 is located may be jointly formed by the first sliding body 301 and the second sliding body 302, so as to facilitate the processing and manufacturing of the first space 311. The first sliding body 301 may be disposed closer to the fixing portion 20 than the second sliding body 302, and the elastic element 32 may be elastically abutted between the first sliding body 301 and the fixing portion 20. Since the cavity wall in which the first space 311 is located is jointly constituted by the first slider 301 and the second slider 302, at least one of the first slider 301 and the second slider 302 may be made of an elastic material. For example, in an embodiment, only the second sliding body 302 may be made of an elastic material, and the second sliding body 302 is disposed away from the fixing portion 20, so that the second sliding body 302 may receive external impact more quickly or directly than the first sliding body 301, thereby easily compressing the first space 311 after receiving the impact. Meanwhile, the elastic member 32 elastically abuts between the fixing portion 20 and the first sliding body 301, so that when the sliding member 31 rebounds reversely, the elastic restoring force of the elastic member 32 can be prevented from directly acting on the second sliding body 302, the deformation of the first space 311 in the rebounding process is reduced, and the quick rebounding is facilitated.

Further, referring to fig. 2, in the case where the second slider body 302 is made of an elastic material, the orifice 312 may be formed on the first slider body 301. Therefore, the orifice 312 is prevented from being deformed after the elastic member 31 is impacted by collision, the resistance of the orifice 312 to the gas discharge is ensured, and the damping effect of the damper is further ensured.

According to some embodiments, referring to fig. 2, the surfaces of the first and second sliding

bodies

301 and 302, respectively, in close contact may be formed with bowl-shaped configurations facing each other, which are snapped to form a first space 311. In other embodiments, a bowl-shaped configuration may be formed on only one of the first and second sliding

bodies

301 and 302. For example, in the case where the second slider body 302 is made of an elastic material as described above, a bowl-shaped configuration may be formed only on the surface of the second slider body 302 which comes into close contact with the first slider body 301, thereby facilitating the compressive deformation of the first space 311.

A preferred embodiment may be combined in accordance with the above discussion, i.e. the slider 31 is composed of a first slider body 301 and a second slider body 302 axially in abutting contact to enclose a first space 311, wherein the abutting contact surfaces of the first slider body 301 and the second slider body 302 are respectively formed with a bowl-shaped configuration facing each other, the throttle hole 312 is formed on the first slider body 301, and the second slider body 302 is made of an elastic material. With such an arrangement, not only the above-mentioned easy compression of the first space 311 and the quick rebound of the elastic member 31 can be achieved, but also the first space 311 can have a sufficient compression space, that is, when the bowl-shaped structure on the second sliding body 302 is compressed to the limit, it can continue to deform toward the bowl-shaped structure on the first sliding body 301, so as to ensure that the damper has a good damping characteristic.

In order to further improve the damping characteristic of the damper, referring to fig. 2, the first sliding body 301 or the second sliding body 302 may be in frictional contact with the inner wall of the cylinder 10, or both the first sliding body 301 and the second sliding body 302 may be in frictional contact with the inner wall of the cylinder 10, so that an auxiliary damping effect may be achieved by the frictional resistance between the sliding member 31 and the inner wall of the cylinder 10, that is, the frictional resistance between the sliding member 31 and the inner wall of the cylinder 10 needs to be overcome during the axial movement of the sliding member 31 toward the fixing portion 20, thereby generating energy loss for buffering. It can be understood that the damping effect of the damper provided by the present disclosure is constituted by the energy loss of the gas discharge of the first space 311 inside the slider 31 and the energy loss by the frictional resistance between the slider 31 and the inner wall of the cylinder 10.

In addition, in order to ensure the sealing property of the first space 311 and the movement synchronization property of the first sliding body 301 and the second sliding body 302, the first sliding body 301 and the second sliding body 302 may be fixedly connected by, for example, bonding or the like.

In the embodiment provided by the present disclosure, referring to fig. 2 and 6, the throttle hole 312 may be configured as a taper hole that tapers from the first space 311 toward the outer diameter of the slider 31. In the case where the orifice 312 is formed in the first slider 301, the axis of the taper hole may coincide with the axis of the cylinder 10, i.e., be coaxial therewith. In this way, the orifice 312 also allows for a difference in the speed of the air flow in the two directions of travel (both axial directions), which is advantageous in that it provides greater damping when moving axially toward the stationary portion 20 and less damping when moving axially away from the stationary portion 20 as described above. The throttle hole 312 may be configured in other shapes and forms according to actual requirements, and the present disclosure is not limited thereto. For example, referring to fig. 7, the orifice 312 may also be configured as a constant-diameter through hole extending from the first space 311 toward the outside of the slider 31. The orifice 312 should be sized within a suitable range, not too large or too small, or not provide a damping effect.

Further, the present disclosure does not limit the number of the orifices 312, and for example, two or more orifices 312 may be provided on the slider 31 to adaptively adjust the damping characteristic of the damper, wherein the plurality of orifices 312 communicate the first space 311 and the outside of the slider 31, respectively.

According to some embodiments, referring to fig. 2 and 4, the fixing portion 20 may be formed with a guide hole 21, and the slider 31 may include a damping structure 313 and a guide structure 314. The damping structure 313 may be in circumferential fitting contact with the inner wall of the cylinder 10 to generate the above-mentioned frictional resistance; the guide structure 314 can extend from the damping structure 313 toward the fixing portion 20 and be slidably engaged with the guide hole 21 to play a guiding role during the axial movement of the slider 31, so as to prevent the slider 31 from tilting away from the axis of the cylinder 10; accordingly, the elastic member 32 can elastically abut between the damping structure 313 and the fixing portion 20. In the case where the slider 31 is composed of the first and

second sliders

301 and 302, referring to fig. 6 to 8, the damping structure 313 may include a first damping structure 3131 formed on the first slider 301 and a second damping structure 3132 formed on the second slider 302, and the first and second damping

structures

3131 and 3132 may respectively achieve the above-described frictional contact of the first and

second sliders

301 and 302 with the inner wall of the cylinder 10. In other embodiments, the damping structure 313 may be formed on only one of the first and second sliding

bodies

301 and 302.

Further, referring to fig. 2, a side wall of the damping structure 313 may be sleeved with a sealing ring 40, and is in contact with an inner wall of the cylinder 10 through the sealing ring 40. The seal ring 40 may be an O-ring, for example. Referring to fig. 6 to 8, a first sealing groove 3133 for mounting the first sealing ring 41 may be opened on a sidewall of the first damping structure 3131, and a second sealing groove 3134 for mounting the second sealing ring 42 may be opened on a sidewall of the second damping structure 3132. While the sliding member 31 generates a frictional resistance between the sealing ring 40 and the inner wall of the cylinder 10 during the axial movement toward the fixed portion 20 to absorb the impact of the external impact, the damping characteristics of the damper can be further improved by providing the first and second sealing rings 41 and 42 on the first and second damping

structures

3131 and 3132, respectively.

As shown in fig. 2, the guide structure 314 may be correspondingly formed on the first slider body 301. It should be noted that the guiding structure 314 has a sufficient axial length, so that the guiding structure 314 is engaged with the guiding hole 21 in the initial state of the damper, and the guiding effect is ensured. As an embodiment, referring to fig. 6 and 7, the guide structure 314 may be configured as a cylinder coaxial with the cylinder 10, which is slidably fitted with the guide hole 21 on the fixing portion 20. The end surface of the free end of the cylinder may be formed with a through hole 315 extending toward the damping structure 313, and the orifice 312 may communicate with the through hole 315, so that the orifice 312 may be opened to a side of the fixed part 20 facing away from the moving part 30, resulting in a wider discharge space of the gas. When the first slider body 301 is manufactured using an injection molding process, the via hole 315 may also serve as a tooling hole to improve the injection molding process by having a uniform wall thickness. That is, in the case that a bowl-shaped structure is formed on the surface of the first slider 301 for contacting the second slider 302, a certain thickness is formed between the wall surface of the first space 311 and the transitional connecting surface between the damping structure 313 and the guiding structure 314, and the thickness of the wall at the position of the via hole 315 and the thickness of the part can be kept uniform by the arrangement of the via hole 315, so that the shrinkage phenomenon in the injection molding process is avoided, and the structural size of the first slider 301 is ensured.

According to some embodiments, referring to fig. 2, the cylinder 10 may be configured as a semi-closed structure with one end open and the other end having a bottom plate, the damping structure 313 may be located inside the cylinder 10, and the end of the slider 31 far away from the fixing portion 20 may extend to the outside of the cylinder 10 through the bottom plate to be able to receive an axial force from the outside. That is, an end of the second sliding body 302 away from the fixing portion 20 may protrude outside the cylinder 10. Meanwhile, the bottom plate can play a role in axially limiting the sliding piece 31, and the sliding piece 31 is prevented from falling off. When the bottom plate is formed on the cylinder 10, the first sliding body 301 and the second sliding body 302 may be formed as separate bodies, that is, there is no connection relationship between the two bodies, and the first sliding body 301 and the second sliding body 302 may be fixed to the bottom plate of the cylinder 10 by being pressed against the elastic force of the elastic member 32.

Further, referring to fig. 2 and 8, the end of the slider 31 protruding out of the cylinder 10 may be configured as a tapered pillar 316 coaxial with the cylinder 10, and the tapered pillar 316 may be tapered toward a direction away from the fixing portion 20, so that the block of the slider 31 caused by the through hole 121 on the bottom plate during the rebound process may be reduced, which is beneficial to achieve rapid rebound. The tapered post 316 may be coupled to the second damping structure 3132 described above. That is, the first slider 301 comprises a first damping structure 3131 and a guiding structure 314, and the second slider 302 comprises a second damping structure 3132 and a tapered post 316.

Referring to fig. 2 and 8, the end of the slider 31 protruding out of the cylinder 10 may also be formed with a mounting hole 317 for mounting a wear pad. That is, the tapered pillar 316 has a mounting hole 317 formed at an end thereof away from the second damping structure 3132, and the wear pad may be fixed in the mounting hole 317 by screwing or bonding. The wear pad can prevent the sliding member 31 from directly contacting with an external object, and reduce the wear of the sliding member 31. In addition, in the case where the bowl-shaped configuration is formed on the surface of the second slider body 302 for abutting contact with the first slider body 301, the mounting hole 317 may also have the above-described effect of helping to improve the uniform wall thickness injection molding process.

In embodiments provided by the present disclosure, referring to fig. 2 and 3, the elastic member 32 may be a compression spring. Wherein the compression spring can be sleeved outside the guiding structure 314 of the sliding part 31. In addition, referring to fig. 2, 6 and 7, in the case that the elastic member 32 is a compression spring, the connection between the damping structure 313 and the guiding structure 314 may also be a tapered structure, which may play a role in limiting the radial direction of the compression spring to some extent, so as to prevent the compression spring from tilting during compression.

According to some embodiments, referring to fig. 1 to 3, in order to facilitate the installation of the slider 31 and the elastic member 32, the cylinder 10 may include a first sleeve 11 and a second sleeve 12 that are axially detachably connected. The first sleeve 11 may be formed with a partition serving as the fixing part 20, and the moving part 30 may be located in a space formed by the partition and the second sleeve 12. Referring to fig. 5, the second sleeve 12 may have a through hole 121 formed therein for the sliding member 31 to extend into the outside of the cylinder 10.

Further, referring to fig. 2 to 4, an outer wall of the first sleeve 11 may be formed as a stepped shaft, a small diameter section of the stepped shaft may be formed with an external thread, and an inner wall of the second sleeve 12 close to the first sleeve 11 may be formed with an internal thread engaged with the external thread, so that the fixed connection of the first sleeve 11 and the second sleeve 12 may be achieved by a screw-coupling manner. Alternatively, the small diameter section of the stepped shaft may be inserted into the second sleeve 12 in an interference fit manner. Still alternatively, the small diameter section of the stepped shaft may be adhesively secured to the second sleeve 12. The outer diameter of the second sleeve 12 may be the same as the outer diameter of the large diameter section of the stepped shaft, so that the cylinder 10 may form an overall smooth outer surface after the second sleeve 12 is mounted on the small diameter section in an abutting manner. In addition, the small diameter section of the stepped shaft may be formed as the above-mentioned blocking member, and the space in the barrel corresponding to the large diameter section of the stepped shaft may reserve an axial movement space for the guide 314 of the slider 31, and may serve as an external space to which the orifice 312 leads.

In other embodiments, the cylinder 10 may be constructed as a single structure having an opening at one end and a bottom plate at the other end, wherein the fixing portion 20 for axially limiting the moving portion 30 may be separately fixed inside the cylinder 10 to facilitate the installation of the sliding member 31 and the elastic member 32 inside the cylinder 10. As an embodiment, a circular groove may be formed on the inner wall of the barrel 10, and the fixing portion 20 may include a snap spring installed in the circular groove and a gasket located on a side of the snap spring close to the sliding member 31. Wherein, the outer diameter of the gasket is larger than the inner diameter of the clamp spring and is propped against the clamp spring by the elastic piece 32. The pads may be correspondingly provided with guide holes 21 for cooperation with the guide structures 314 of the slide 31.

In summary, when the damper provided by the embodiment of the present disclosure is impacted by an external collision, the tapered pillar 316 of the slider 31 moves toward the fixing portion 20 along the axial direction, and drives the second damping structure 3132 inside the cylinder 10 and pushes the first sliding body 301 and the elastic element 32 to move toward the fixing portion 20 at the same time, the guide structure 314 slides along the guide hole 12, the elastic element 32 is compressed to store elastic potential energy, the first space 311 is compressed and deformed, the internal gas is exhausted outwards through the orifice 312, meanwhile, the frictional resistance between the damping structure 313 and the inner wall of the cylinder 10 generates a damping effect, the two damp the impact force together, after the collision is finished, the elastic element 32 releases the elastic potential energy, and pushes the slider 31 to move away from the fixing portion 20 along the axial direction until the second damping structure 3132 abuts against the bottom plate of the cylinder 10, and the damper returns to the initial state.

The present disclosure also provides an unmanned aerial vehicle foot rest and an unmanned aerial vehicle equipped with the same, wherein the unmanned aerial vehicle foot rest can include the above-mentioned damper. Unmanned aerial vehicle foot rest and unmanned aerial vehicle have the whole beneficial effect of foretell attenuator, and this place is no longer repeated. The attenuator can the installation fix on the unmanned aerial vehicle foot rest, also can directly regard as partly of unmanned aerial vehicle foot rest to can cushion the collision that comes from ground or object. The volume and shape of the first space 311 can be adjusted accordingly according to the weight and load of the drone. In addition, unmanned aerial vehicle foot rest in this disclosure also refers to unmanned aerial vehicle's undercarriage.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. A damper, comprising:

a cylinder (10);

a fixing part (20) fixedly connected to the inside of the cylinder (10); and

a moving part (30) comprising:

a slide (31) configured to be axially movable inside the barrel (10); and

an elastic member (32) elastically abutting between the fixed portion (20) and the slider (31),

wherein a first space (311) is formed inside the slider (31), and the slider (31) has an orifice (312) communicating the first space (311) with the outside of the slider (31), the slider (31) being made at least partially of an elastic material so that the gas of the first space (311) is compressed and discharged through the orifice (312) when moving toward the fixing portion (20).

2. Damper according to claim 1, wherein the slider (31) comprises a first slider body (301) and a second slider body (302) in axial abutting contact to enclose the first space (311), wherein the elastic element (32) is elastically urged between the first slider body (301) and the fixed part (20), the first slider body (301) and/or the second slider body (302) being made of an elastic material.

3. Damper according to claim 2, characterized in that the surfaces of the first (301) and second (302) sliding bodies, which are in abutting contact, are formed with respective bowl-shaped configurations facing each other and snap-fitted to form the first space (311).

4. Damper according to claim 2, characterized in that said first slider (301) and/or said second slider (302) are in frictional contact with the inner wall of said cylinder (10).

5. Damper according to claim 2, characterized in that the first slider body (301) is fixedly connected with the second slider body (302).

6. The damper according to claim 1, characterized in that the throttle hole (312) is configured as a taper hole that tapers from the first space (311) toward an outer diameter of the slider (31).

7. A damper according to any one of claims 1 to 6, wherein the fixed portion (20) is formed with a guide hole (21), the slider (31) comprises a damping structure (313) in circumferential abutting contact with the inner wall of the cylinder (10), and a guide structure (314) extending from the damping structure (313) toward the fixed portion (20) and slidably engaged with the guide hole (21), and the elastic member (32) is elastically abutted between the damping structure (313) and the fixed portion (20).

8. A damper according to claim 7, wherein said guide structure (314) is configured as a cylinder coaxial with said cylinder (10), an end face of a free end of said cylinder being formed with a through hole (315) extending toward said damping structure (313), said orifice (312) communicating with said through hole (315).

9. The damper according to claim 7, characterized in that the side wall of the damping structure (313) is sleeved with a sealing ring (40) and is in fit contact with the inner wall of the cylinder (10) through the sealing ring (40).

10. A damper according to claim 7, wherein the resilient member (32) is a compression spring which is fitted over the outside of the guide structure (314).

11. A damper according to any one of claims 1-6, wherein the cylinder (10) is constructed in a semi-closed structure with one end open and the other end having a bottom plate, and the end of the slider (31) remote from the fixing portion (20) is projected to the outside of the cylinder (10) through the bottom plate.

12. A damper as claimed in claim 11, characterized in that the end of the slider (31) projecting beyond the cylinder (10) is configured as a conical column (316) coaxial with the cylinder (10), the conical column (316) tapering in diameter away from the fixed part (20).

13. A damper according to claim 11, wherein the end of the slider (31) projecting from the cylinder (10) is formed with a mounting hole (317) for mounting a wear pad.

14. Damper according to claim 1, characterized in that said cartridge (10) comprises a first sleeve (11) and a second sleeve (12) axially removably connected, said first sleeve (11) being formed with a partition acting as said fixed part (20), said moving part (30) being located in the space formed by said partition and said second sleeve (12).

15. A damper according to claim 14, wherein the outer wall of the first sleeve (11) is formed as a stepped shaft, a small diameter section of the stepped shaft is formed with an external thread, and an inner wall of the second sleeve (12) close to the first sleeve (11) is formed with an internal thread that is engaged with the external thread.

16. An unmanned aerial vehicle foot stand, comprising a damper according to any of claims 1-15.

17. A drone, characterized in that it comprises a drone foot stand according to claim 16.