CN111278729A

CN111278729A - Connection structure, frame and aircraft

Info

Publication number: CN111278729A
Application number: CN201980004972.9A
Authority: CN
Inventors: 蒋李; 吴利鑫; 陈志强
Original assignee: SZ DJI Technology Co Ltd
Current assignee: SZ DJI Technology Co Ltd
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2020-06-12
Also published as: WO2020237678A1

Abstract

A connecting structure comprising: an elastic body (100) for connecting to one of the horn (20) and the body (30); the rotating shaft assembly (200) is connected with the elastic body (100) and is used for being connected with the other one of the machine arm (20) and the machine body (30) so that the machine arm (20) rotates relative to the machine body (30) to have at least one stroke interval; the rotating shaft assembly (200) is also used for abutting and compressing the elastic body (100) in the process that the machine arm (20) is close to the third position, and the elastic body (100) is also used for enabling the machine arm (20) to automatically rotate to the first position or the second position when the machine arm (20) exceeds the third position; it also relates to a frame and an aircraft.

Description

Connection structure, frame and aircraft

Technical Field

The application relates to the technical field of vibration reduction connection of aircrafts, in particular to a connection structure, a rack and an aircraft.

Background

For aircrafts such as unmanned planes, the power system is the main source of fuselage vibration, and the vibration of the fuselage causes many problems, such as the over-range, aliasing, structural fatigue and the like of the IMU.

Among the prior art, reduce the vibration influence of fuselage through addding damping system between fuselage and horn, however, under a lot of circumstances, aircrafts such as unmanned aerial vehicle have the volume requirement, addding damping system can increase the complete machine volume undoubtedly, and both need realize rotating the function and need realize self-locking function between current fuselage and the horn, this setting degree of difficulty that leads to damping system increases, and the damping effect is also not good.

Disclosure of Invention

Accordingly, there is a need for a connection structure that solves at least one of the above problems.

A connection structure for rotational connection of a horn to a fuselage such that the horn is rotatable relative to the fuselage and is maintained in a predetermined position relative to the fuselage, wherein the connection structure comprises: an elastic body for connecting with one of the horn and the body; the rotating shaft assembly is connected with the elastic body and is used for being connected with the other one of the machine arm and the machine body, so that the machine arm has at least one stroke interval relative to the rotation of the machine body; the rotating shaft assembly is also used for abutting and compressing the elastic body in the process that the machine arm is close to the third position, and the elastic body is also used for enabling the machine arm to automatically rotate to the first position or the second position when the machine arm exceeds the third position.

A rack, comprising: the connecting structure in any one of the above technical solutions; a horn connected to one of the elastic body of the connection structure and the rotary shaft assembly; a body connected to the other of the elastic body and the rotary shaft assembly.

An aircraft, comprising: in any of the above technical solutions, the power system is disposed on an arm in the frame and is configured to provide flight power for the aircraft.

Compared with the prior art, the method has the following beneficial technical effects:

the application provides a connection structure utilizes the elastomer to be connected with one in horn and the fuselage, and the pivot subassembly is connected with the other in horn and the fuselage to the pivot subassembly is connected in the elastomer, has realized assembling fuselage and horn, and has the function of following triplex between messenger's horn and the fuselage:

firstly, the machine body and the machine arm can rotate relatively by utilizing the rotating shaft assembly, so that the rotating requirement of the machine arm relative to the machine body is met, and the function that the machine arm can rotate relative to the machine body to fold or unfold is realized;

the elastic body can efficiently absorb vibration energy by utilizing the vibration absorption and buffering performance of the elastic body, and the elastic body is connected with one of the horn and the fuselage, so that the elastic body has a good vibration interception effect between the rotating shaft assembly and one of the horn and the fuselage, the vibration energy transmitted to the fuselage is reduced, the vibration influence of a power system on the horn and the horn on the fuselage is greatly reduced, the vibration attenuation effect on the fuselage is improved, and the performance of the aircraft is improved;

and thirdly, in the process that the elastic body and the rotating shaft assembly rotate relative to the machine body, the elastic body is compressed when the rotating shaft assembly is close to a third position in a stroke interval by the machine arm so that the elastic body can store energy, and after the machine arm exceeds the third position, the elastic body releases elastic potential energy to drive the machine arm to reset to the first position or the second position in the stroke interval, so that the self-locking function between the machine arm and the machine body is realized.

Generally speaking, the connection structure provided by the application has the elastic body capable of absorbing vibration to prevent the vibration energy of the horn from being transferred to the machine body between the horn and the machine body, and solves the problem of machine body vibration, and compared with the scheme of additionally arranging a vibration damping system for vibration damping in the prior art, the elastic body in the design can be matched with the rotating shaft assembly in the rotation process of the horn and can respond by energy storage and elastic recovery through compression, so that the self-locking and rotation processes between the horn and the machine body are well integrated, therefore, on one hand, the integrated design of the connection structure integrating vibration damping, rotation and self-locking functions into a whole is realized, the problems of large difficulty in setting the vibration damping system, poor vibration damping effect and the like caused by poor compatibility with the rotation and self-locking processes existing in the prior art due to the independent arrangement of the vibration damping system are avoided, and meanwhile, the simplification of product parts is also realized, the aircraft is more beneficial to the miniaturization design of the aircraft and is also more beneficial to popularization and application in the field; on the other hand, be different from the pivot subassembly that the tradition utilized the spring to carry out the energy storage and put the ability, what this application adopted is that the elastomer carries out the energy storage and puts the ability, like this, when satisfying the energy storage, putting the ability demand, the volume of elastomer is far less than the spring to compare in the spring and can greatly reduce the compression stroke volume, thereby can save the inner space demand of product, more do benefit to the compactedness design of product, reduce product overall dimension, in order to do benefit to the miniaturized design of aircraft.

Additional aspects and advantages of the present application will be set forth in part in the description which follows, or may be learned by practice of the present application.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic front view of a connection structure according to an embodiment of the present application;

FIG. 2 is a schematic bottom view of the connection shown in FIG. 1;

FIG. 3 is a schematic view of the cross-sectional structure B-B in FIG. 2;

FIG. 4 is a perspective view of the connection shown in FIG. 1;

FIG. 5 is an exploded view of the connection shown in FIG. 1;

FIG. 6 is a schematic view of an assembly structure of the connecting structure and the horn according to an embodiment of the present application;

FIG. 7 is a schematic view of the assembled structure shown in FIG. 6 from another perspective;

FIG. 8 is a bottom view of the assembled structure shown in FIG. 6;

FIG. 9 is a schematic view of the cross-sectional structure C-C of FIG. 8;

FIG. 10 is an exploded view of the assembled structure shown in FIG. 6;

FIG. 11 is a schematic view of an assembled structure of a connecting structure and a fuselage according to an embodiment of the present application;

FIG. 12 is a schematic view of an assembled structure of a connecting structure and a fuselage according to an embodiment of the present application;

FIG. 13a is a graphical illustration of frequency versus acceleration magnitude for a fuselage in an embodiment of the present application;

FIG. 13b is a graph of frequency versus acceleration amplitude for a fuselage in a prior art airframe;

FIG. 14a is a graph of frequency versus acceleration amplitude for a horn according to one embodiment of the present application;

figure 14b is a graph of frequency versus acceleration amplitude for a horn in a prior art gantry.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 12 is:

10 connecting structure, 100 elastomer, 110 elastomer shaft hole, 121 first boss, 122 second boss, 123 connecting part, 1231 lug, 1232 mounting hole, 124 recess, 200 pivot subassembly, 210 pivot, 211 first backstop, 2111 backstop structure, 2112 backstop end face, 212 second backstop, 2121 fixed part, 220 rotating part, 221 outer contour line, 221a arc line segment, 221b connecting line segment, 222 rotating part shaft hole, 223 second cam structure, 230 moving part, 231 first cam structure, 2311 hump structure, 232 moving part shaft hole, 233 bulge, 20 machine arm, 21 connecting hole, 22a first end, 22b second end, 30 machine body, 31 avoiding hole, 32 positioning part, 33 fixing hole and 40 fastener.

Detailed Description

In order that the above objects, features and advantages of the present application can be more clearly understood, the present application will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.

The connection structure, the airframe and the aircraft according to some embodiments of the present application are described below with reference to fig. 1-12.

As shown in fig. 1 to 5, the embodiment of the first aspect of the present application provides a connection structure 10 for rotatably connecting the horn 20 to the body 30, so that the horn 20 can rotate relative to the body 30 and be maintained at a predetermined position relative to the body 30.

Among them, it can be understood that the horn 20 and the body 30 are adapted to: the horn 20 is rotatable relative to the body 30 between a folded position and an unfolded position to effect folding or unfolding, respectively, of the horn 20 relative to the body 30. The aforementioned predetermined position of the middle arm 20 relative to the fuselage 30 may be specified as a folded position, as well as an unfolded position, and may even be specified as any one of one or more intermediate positions between the folded position and the unfolded position.

As shown in fig. 1, the connecting structure 10 includes an elastic body 100 and a rotary shaft assembly 200.

As for the elastic body 100, it is understood by those skilled in the art that the elastic body 100 may be understood as a material that can be restored to its original shape after an external force is removed, or a polymer material that can be deformed significantly under stress and can be restored to its original state and size rapidly after the stress is relaxed.

The elastic body 100 is used for connecting with one of the horn 20 and the body 30; the rotating shaft assembly 200 is connected with the elastic body 100 and is used for being connected with the other one of the horn 20 and the body 30, so that the rotating movement of the horn 20 relative to the body 30 has at least one stroke interval; the stroke section has a first position, a second position and a third position between the first position and the second position, the rotating shaft assembly 200 is further configured to abut against and compress the elastic body 100 when the robot arm 20 approaches the third position, and the elastic body 100 is further configured to automatically rotate the robot arm 20 to the first position or the second position when the robot arm 20 exceeds the third position.

For example, any stroke interval is taken as an example for description:

during the process that the horn 20 approaches the third position from the first position under the action of the external force (i.e. during the process that the horn 20 moves from the first position to the third position), the rotating shaft assembly 200 can act against the elastic body 100, so that the elastic body 100 is compressed to store energy.

When the external force acting on the horn 20 is removed, for a case where the horn 20 does not exceed the third position but is between the first position and the third position when the external force is removed, the elastic body 100 releases the elastic potential energy and drives the horn 20 so that the horn 20 rotates to the first position.

When the horn 20 exceeds the third position, the elastic body 100 releases the elastic potential energy and drives the horn 20 such that the horn 20 rotates to the second position.

Thereby, it is achieved that the horn 20 is held in this first or second position relative to the body 30, i.e. a self-locking function of the horn 20 relative to the body 30 is achieved.

Of course, for the above-listed cases, the process of the horn 20 approaching from the second position to the third position may be reversely understood, so that the elastic body 100 automatically drives the horn 20 to return to the second position according to the case that the horn 20 does not exceed the third position when the external force is removed; and automatically drives the arm 20 to return to the first position when the arm 20 is beyond the third position and between the third position and the first position.

Additionally, it will be appreciated that the horn 20 may have one or more travel ranges between the folded and unfolded positions relative to the fuselage 30.

For example, in the case of a travel range between the folded position and the unfolded position, one of the first position and the second position may be understood as the folded position, and the other may be understood as the unfolded position, and then the preset positions may be adjusted according to the product status in both the folded position and the unfolded position.

For the condition that a plurality of travel intervals are arranged between the folding position and the unfolding position, the plurality of travel intervals are sequentially arranged, wherein for two travel intervals arranged at the head end and the tail end in the plurality of travel intervals, the first position of the travel interval at the head end can be understood as the folding position, and the second position of the travel interval at the tail end can be understood as the unfolding position, at this time, the preset position can be adjusted at the first position and the second position (including the folding position at the head end and the unfolding position at the tail end) of the plurality of travel intervals along with the product state. Optionally, for any two adjacent stroke intervals in the plurality of stroke intervals, the second position of the previous stroke interval may be used as the first position of the next stroke interval; of course, the present solution is not limited to this, and the adjacent stroke intervals may be in a relatively independent relationship.

In the connection structure 10 provided in the above embodiment of the present application, the elastic body 100 can absorb vibration to prevent the vibration energy of the horn 20 from being transferred to the body 30 between the horn 20 and the body 30, so as to solve the problem of vibration of the body 30, and compared with the scheme of additionally adding a vibration damping system to damp vibration in the prior art, the elastic body 100 in the design can be matched with the rotating shaft assembly 200 in the rotation process of the horn 20 and can respond by compressing to store energy and elastically recover to release energy, so as to be well integrated in the self-locking and rotating processes between the horn 20 and the body 30, so on one hand, an integrated design that the connection structure 10 integrates vibration damping, rotation and self-locking functions into a whole is realized, and the problems of great difficulty in setting the vibration damping system, poor vibration damping effect and the like caused by the fact that the vibration damping system is separately set up in the prior art and the self-locking process is poor are avoided, meanwhile, the simplification of product parts is realized, the miniaturization design of the aircraft is facilitated, and the popularization and the application in the field are facilitated; on the other hand, be different from the pivot subassembly 200 that the tradition utilized the spring to carry out the energy storage and put the ability, what this application adopted is that elastomer 100 carries out the energy storage and puts the ability, like this, satisfying the energy storage, when putting the ability demand, elastomer 100's volume is far less than the spring to compare in the spring and can greatly reduce the compression stroke volume, thereby can save the inner space demand of product, more do benefit to the compactedness design of product, reduce product overall dimension, in order to do benefit to the miniaturized design of aircraft.

Preferably, the elastic body 100 is used for the connection of the body 30, and the rotation shaft assembly 200 is used for the connection of the horn 20.

Example 1:

as shown in fig. 3, in addition to the features of any of the above embodiments, it is further defined that the rotary shaft assembly 200 includes: a rotating shaft 210 and a rotating member 220, wherein the rotating shaft 210 is connected to the elastic body 100; the rotating part 220 is arranged on the rotating shaft 210 and can rotate around the rotating shaft 210, the rotating part 220 is used for connecting with the other one of the machine arm 20 and the machine body 30, and the rotating part 220 is in transmission fit with the elastic body 100; the elastic body 100 is compressed when the rotating member 220 rotates to make the arm 20 approach the third position, and when the rotating member 220 rotates to make the arm 20 exceed the third position, the elastic body 100 is released, and the elastic restoring force generated by the elastic body 100 makes the rotating member 220 drive the arm 20 to rotate to the first position or the second position.

In this embodiment, the elastic body 100 is connected to the rotating shaft 210 for providing a rotation center to the rotating member 220, so that the assembly is simple and convenient, and the stability of the assembly of the rotating shaft 210 is ensured, thereby improving the stability of the rotation of the rotating member 220 rotating around the rotating shaft 210 and the rotating stability of the arm 20 or the body 30 connected to the rotating member 220 and rotating around the rotating shaft 210 with the rotating member 220. And the elastic body 100 can directly absorb the vibration of the rotating shaft 210 for providing the rotation center, wherein it can be understood that the rotating shaft 210 is a component for providing the rotation center for the rotating member 220, and can be equivalent to a base or a foundation of the whole rotating shaft assembly 200, and the vibration of the rotating shaft 210 is directly absorbed by the vibration, compared with the existing scheme of self-locking the horn 20 and the body 30 by using spring energy storage and energy release, the vibration energy of the elastic body 100 in all directions of the rotating shaft assembly 200 can be well absorbed, so that the intercepting effect of the vibration energy between the horn 20 and the body 30 is maximally improved, the vibration absorbing effect is better and more reliable, and the vibration influence of the body 30 is further improved.

Example 2:

as shown in fig. 3, in addition to the features of embodiment 1 described above, there are further defined: the elastic body 100 is provided with an elastic body shaft hole 110, and a part of the rotating shaft 210 is sleeved in the elastic body shaft hole 110. The shaft hole matching is formed between the elastic body 100 and the rotating shaft 210, so that the elastic body 100 can efficiently absorb the vibration of any radial position of the rotating shaft 210, and thus, the whole connecting structure 10 not only has better flexibility (or smaller rigidity) in the direction in which the elastic body 100 is pressed or released for energy storage or release, but also has better flexibility in any radial direction of the rotating shaft 210, so that the connecting structure 10 has better vibration damping effect between the horn 20 and the body 30, and the vibration influence of the body 30 is further improved.

Optionally, the shaft 210 is in a transition or interference fit with the elastomeric shaft bore 110. Therefore, no gap or a small amount of gap is formed between the rotating shaft 210 and the elastic body shaft hole 110, so that the stability of the rotating member 210 by the elastic body 100 is further improved, the rotating stability of the rotating member 220 and the arm 20 or the body 30 connected to the rotating member 220 is correspondingly improved, and the vibration absorption effect of the elastic body 100 on the rotating shaft 210 can be further improved.

Preferably, the rotating shaft 210 is in transition fit with the elastic body shaft hole 110, that is, a certain clearance is provided between the rotating shaft 210 and the elastic body shaft hole 110, or the rotating shaft 210 and the elastic body shaft hole 110 are just adapted to each other, or a certain tight fit is provided between the rotating shaft 210 and the elastic body shaft hole 110, so that the rotating shaft 210 can be more conveniently inserted into the elastic body shaft hole 110 to realize assembly, and the assembly efficiency of the product is ensured.

Optionally, the ratio of the axial length of the portion of the rotating shaft 210 in the elastomer shaft hole 110 to the total axial length of the rotating shaft 210 is greater than or equal to 1/4. The axial direction of the rotating shaft 210 can refer to the direction indicated by ax in fig. 1, 3, 4, 6 and 9. The axial length is also the length in the ax direction.

This can further improve the stability of the elastic body 100 on the rotating shaft 210, avoid the rotating shaft 210 from deflecting, and improve the rotating smoothness of the rotating member 220 rotating around the rotating shaft 210 and even the arm 20 or the body 30 connected to the rotating member 220. And the matching length of the rotating shaft 210 and the elastic body shaft hole 110 is designed to be more than 1/4 of the total length of the rotating shaft 210, so that the vibration energy of the elastic body 100 on the rotating shaft 210 can be sufficiently absorbed, and the vibration influence of the machine body 30 is further improved.

Preferably, the ratio of the axial length of the portion of the rotating shaft 210 in the elastomer shaft hole 110 to the total axial length of the rotating shaft 210 is greater than or equal to 1/3.

Preferably, the shape of the elastic body shaft hole 110 is adapted to the shape of the shaft section of the portion of the rotating shaft 210 located in the elastic body shaft hole 110, so that the opposite surfaces of the rotating shaft 210 and the elastic body shaft hole 110 can be uniformly contacted or have a similar curvature, so that the elastic body 100 has a better vibration absorption effect on the rotating shaft 210, and the stability effect of the elastic body 100 on the rotating shaft 210 can be better improved.

Alternatively, the elastomer shaft hole 110 may be designed as a circular hole, and the axial cross-sectional shape of the portion of the rotating shaft 210 located in the elastomer shaft hole 110 is circular. Of course, the present embodiment is not limited to this, and in other embodiments, the elastic body shaft hole 110 may be designed as an elliptical hole, a square hole, a rectangular hole, a trapezoidal hole, or the like, and accordingly, the shaft cross-sectional shape of the portion of the rotating shaft 210 located in the elastic body shaft hole 110 may be designed as an elliptical shape, a square shape, a rectangular shape, a trapezoidal shape, or the like.

It should be noted that, regardless of whether the shape of the inner peripheral surface of the elastic body shaft hole 110 and the axial cross-sectional shape of the portion of the rotating shaft 210 located in the elastic body shaft hole 110 are circular, elliptical, square, rectangular, trapezoidal, or other shapes not listed, such as triangular, pentagonal, semicircular, the shapes thereof are roughly understood to be circular, elliptical, square, rectangular, trapezoidal, triangular, pentagonal, semicircular, etc., macroscopically, and the shapes thereof are not particularly specified to be circular, elliptical, square, rectangular, trapezoidal, triangular, pentagonal, semicircular, etc., whose shapes are strictly required to be standardized.

Example 3:

as shown in fig. 4, in addition to the features of any of the above embodiments, further defined are: the rotating shaft 210 is provided with a first stopping portion 211 and a second stopping portion 212, the first stopping portion 211 and the second stopping portion 212 are distributed at intervals along the axial direction of the rotating shaft 210, and a portion of the rotating shaft 210 located between the first stopping portion 211 and the second stopping portion 212 is connected with the elastic body 100 and the rotating member 220, so that the elastic body 100 and the rotating member 220 are axially limited between the first stopping portion 211 and the second stopping portion 212.

In this scheme, set up first backstop portion 211 and second backstop portion 212 and distribute in the both sides of elastomer 100 and rotation piece 220 along the axial of pivot 210, can realize spacing first backstop portion 211 and second backstop portion 212 with elastomer 100 and rotation piece 220 axial, thus, on the one hand, the effect of absorbing vibration of elastomer 100 to pivot 210 along axial vibration has been guaranteed, thereby realize that elastomer 100 is to the comprehensive cover (axial and arbitrary radial) of the direction of absorbing vibration of pivot 210, further strengthen the damping effect to fuselage 30, on the other hand, can form and rotate and be spacing relatively between 220 and the elastomer 100, make the stress output of rotation piece 220 and the compressive stress input of elastomer 100 keep accurate, thereby improve the atress effect of elastomer 100, promote the effect of absorbing vibration of elastomer 100 and energy storage and release the effect.

Preferably, as shown in fig. 5, one of the first and second stopping

portions

211 and 212 is a stopping structure 2111 integrally formed on the rotating shaft 210, and the other is a fixing member 2121 assembled with the rotating shaft 210. That is, one of the first stopping portion 211 and the second stopping portion 212 is integrated with the rotating shaft 210, and the other is the fixing element 2121 capable of being assembled with or disassembled from the rotating shaft 210, so that the assembly between the rotating shaft 210 and the elastic body 100 and the rotating element 220 is more convenient.

For example, the first blocking portion 211 is a blocking structure 2111 and is integrally formed on the rotating shaft 210. More specifically, as shown in fig. 3 and 5, the stop feature 2111 is embodied as a shoulder feature formed on the shaft 210.

As shown in fig. 2, the second stopping portion 212 is a fixing element 2121, the fixing element 2121 can be a nut or a threaded locking ring, and the rotating shaft 210 is provided with a threaded structure, and the fixing element 2121 is threadedly connected to the rotating shaft 210 for assembly.

Of course, in other embodiments, the first stopping portion 211 and the second stopping portion 212 may be alternatively provided as the fixing member 2121, which can be assembled with or disassembled from the rotating shaft 210.

Preferably, as shown in fig. 3 and 4, the first stopper 211 is located at one axial end of the rotating shaft 210 and abuts against the elastic body 100. This makes the axial abutting position of the elastic body 100 and the rotating shaft 210 adjacent to the end of the rotating shaft 210, and can further strengthen the vibration absorbing effect on the rotating shaft 210 and even the whole rotating shaft assembly 200, and further improve the vibration effect of the body 30.

Further, as shown in fig. 4 and 5, the first stopper portion 211 has a stopper end surface 2112, and the stopper end surface 2112 is disposed along the outer circumference of the rotating shaft 210 and abuts against the elastic body 100. Thus, the supporting stress of the stop end face 2112 on the elastic body 100 is more uniformly distributed along the circumferential direction of the elastic body 100, the elastic body 100 is prevented from being affected by concentrated stress, the crushing risk of the elastic body 100 is reduced, and the service life of the product is prolonged.

Preferably, as shown in fig. 3, 4 and 5, a first boss 121 is configured at a position of the elastic body 100 corresponding to the first stopping portion 211, and the first boss 121 of the elastic body 100 abuts against the first stopping portion 211. This strengthens the elastic ability of the portion of the elastic body 100 for abutting against the first stopper portion 211, thereby further strengthening the vibration-damping and shock-absorbing effect of the elastic body 100 on the rotating shaft 210. And the design of the first boss 121, on the premise of not needing to increase the volume of the elastic body 100 too much, can help to lengthen the matching length of the elastic body shaft hole 110 and the rotating shaft 210, strengthen the stability of the rotating shaft 210.

For example, as shown in fig. 10, the first boss 121 is a circular cylinder, and the stopping structures 2111 are circular shoulders distributed around the periphery of the rotating shaft 210.

Example 4:

as shown in fig. 2, in addition to the features of any of the above embodiments, further defined are: the outer contour line 221 of the section formed by the rotation member 220 taken by a plane perpendicular to the center line of the rotation shaft 210 is non-circular, and the rotation member 220 is adapted to be inserted into the coupling hole 21 of the other of the arm 20 and the body 30; wherein the outer contour line 221 is adapted to the shape of the inner circumferential contour of the connection hole 21. Therefore, in the process that the rotating piece 220 rotates around the rotating shaft 210, the torque can be transmitted to the machine arm 20 or the machine body 30 connected with the rotating piece to drive the machine arm 20 or the machine body 30 connected with the rotating piece to rotate, the structural design enables the rotating piece 220 and the machine arm 20 or the machine body 30 not to slip easily, the advantages of high efficiency and reliability in torque transmission are achieved, and the rotating piece 220 and the connecting hole 21 are convenient to assemble, for example, the rotating piece 220 can be inserted into the connecting hole 21.

Preferably, the outer contour line 221 includes an unclosed arc line segment 221a and a connection line segment 221b, and the arc line segment 221a and the connection line segment 221b are connected in a staggered manner; the connecting line 221b is a straight line segment, a broken line segment, or an arc line segment with a curvature different from that of the arc line segment 221 a.

For example, the centerline of the rotating shaft 210 is perpendicular to the paper surface and the perpendicular point can refer to the point O shown in fig. 2, wherein the outer contour 221 of the projection of the rotating member 220 along the centerline of the rotating shaft 210 (or the outer contour 221 of the cross section of the rotating member 220 perpendicular to the centerline of the rotating shaft 210) is non-circular.

As shown in fig. 2, more specifically, the outer contour line 221 includes two circular arc line segments 221a and two connecting line segments 221b, and the connecting line segments 221b are selected as straight line segments, two ends of one straight line segment are correspondingly connected to one end of each of the two circular arc line segments 221a, and two ends of the other straight line segment are correspondingly connected to the other end of each of the two circular arc line segments 221a, so that the two straight line segments and the two circular arc line segments 221a are alternately arranged around the center line of the rotating shaft 210 and enclose the closed outer contour line 221.

Preferably, the two arc line segments 221a are distributed oppositely, and the middle of the arc line segment 221a protrudes towards a direction away from the central line of the rotating shaft 210; the two straight line segments are oppositely distributed.

More preferably, the two circular arc line segments 221a are distributed axisymmetrically or rotationally symmetrically, and the two straight line segments are distributed axisymmetrically or rotationally symmetrically. Such that the outer contour line 221 is substantially racetrack shaped. The design can make the atress of rotating piece 220 more even, more symmetrical in the transmission process to more do benefit to and promote the bearing capacity who rotates piece 220, promote product quality.

Of course, it is understood that the number of the circular arc line segments 221a may not be limited to the 2 listed, and may also be designed to be 1, 3 or more than 3 according to the requirement, and correspondingly, the number of the connecting line segments 221b may also not be limited to the 2 listed, and may also be designed to be 1, 3 or more than 3 according to the requirement.

Example 5:

as shown in fig. 3, in addition to the features of any of the above embodiments, further defined are: the rotating member 220 is provided with a rotating member shaft hole 222, and a portion of the rotating shaft 210 is inserted into the rotating member shaft hole 222, so that the rotating member 220 can rotate around the rotating shaft 210. Through making and forming the shaft hole cooperation between rotation piece 220 and the pivot 210, both guaranteed the rotation stationarity of rotating piece 220, and the vibration on the horn 20 transmits for rotating piece 220 after, rotation piece 220 can radially transmit for pivot 210 to further radially transmit for elastomer 100 through pivot 210, thereby make vibration energy finally absorbed by elastomer 100, thereby guaranteed the absorption efficiency to the vibration energy of rotation piece 220, further improve the damping effect to fuselage 30. And the elastic body 100 and the rotating member 220 are respectively matched with the rotating shaft 210 to form shaft holes, so that the torque transmitted from the rotating member 220 to the elastic body 100 through the rotating shaft 210 is smaller, and the abrasion of the elastic body 100 is reduced.

Example 6:

as shown in fig. 1 and 3, in addition to the features of any of the above embodiments, further defined are: the rotating shaft assembly 200 further includes a movable member 230, a cam transmission fit is formed between the movable member 230 and the rotating member 220, and the rotating member 220 can rotate relative to the movable member 230, so that the movable member 230 compresses or releases the elastic body 100; when the contact point of the rotating member 220 and the moving member 230 reaches the highest point of the cam, the elastic body 100 is compressed, and when the contact point of the rotating member 220 and the moving member 230 avoids the highest point of the cam, the elastic body 100 is released, and the elastic restoring force generated by the elastic body 100 drives the rotating member 220 to rotate, so that the arm 20 automatically rotates to the first position or the second position.

The cam transmission cooperation is formed between the moving member 230 and the rotating member 220, so that the rotating motion of the rotating member 220 can be converted into the displacement motion of the moving member 230 for outputting, that is, in the rotating process of the rotating member 220, the moving member 230 is driven to perform the displacement motion and compress the elastic body 100, and in turn, the elastic body 100 elastically restores to drive the moving member 230 to perform the displacement motion, so that the moving member 230 drives the rotating member 220 to rotate, and the rotating member 220 drives the arm 20 to rotate for resetting. Wherein, utilize moving part 230, when realizing the transmission purpose, have simple structure, arrange advantages such as compact, small in size, equipment convenience, and the cam transmission cooperation that forms between moving part 230 and the rotation piece 220 is regarded as separation and reunion type cooperation, can play certain damping, inhale the vibration effect to reduce the vibration volume that rotates the piece 220 to the moving part 230 transmission, and then to the vibration energy of fuselage 30 transmission, promote the stationarity of fuselage 30.

Further, as shown in fig. 3, the elastic body 100 is located on one side of the movable element 230 along the axial direction of the rotating shaft 210, the rotating element 220 is located on the other side of the movable element 230 along the axial direction of the rotating shaft 210, a first cam structure 231 is configured on the surface of the movable element 230 corresponding to the rotating element 220, a second cam structure 223 is configured on the surface of the rotating element 220 corresponding to the movable element 230, and the first cam structure 231 and the second cam structure 223 form a cam transmission fit.

The form that the elastomer 100, the moving part 230, the rotation part 220 are arranged along the axial direction of the rotating shaft 210 has the advantages of compact layout, positioning and accurate limiting of the moving part 230, and the moving part 230 is arranged between the elastomer 100 and the rotation part 220, so that the moving stroke of the moving part 230 can be designed to be shorter, the driving precision of the rotation part 220 and the elastomer 100 to the moving part 230 can be higher, and the running precision of a product can be further improved.

In more detail, one of the first cam structure 231 and the second cam structure 223 includes a slider, and the other includes a plurality of grooves, both side wall surfaces of the grooves opposite to each other are configured as inclined surfaces or arc surfaces and make openings of the grooves gradually increase, and the rotation member 220 rotates relative to the movable member 230 so that the slider slides along the side wall surfaces of the grooves.

Further, adjacent sidewall surfaces of adjacent grooves are engaged and define a peak structure 2311, and the apex of the peak structure 2311 is formed as the highest point of the cam.

For example, as shown in fig. 5, the movable member 230 is provided with a first cam structure 231, the first cam structure 231 includes two grooves, the rotating member 220 is provided with a second cam structure 223, and the second cam structure 223 includes a slider as an example for description:

wherein, the moving member 230 is formed with two convex peak structures 2311, which are corresponding to a first convex peak structure and a second convex peak structure, the two grooves are corresponding to a first groove and a second groove, the first groove and the second groove are arranged along the circumferential direction of the rotating shaft 210, each groove has two side wall surfaces, the first side wall surface of the first groove is adjacent to the first side wall surface of the second groove and defines the first convex peak structure, and the second side wall surface of the first groove is adjacent to the second side wall surface of the second groove and defines the second convex peak structure.

Preferably, the first side wall surface and the second side wall surface of the first groove together form an arc-shaped recess with gradually increasing opening, and the first side wall surface and the second side wall surface of the second groove together form an arc-shaped recess with gradually increasing opening, so as to reduce the sliding resistance.

The rotating member 220 is formed with a convex surface portion protruding toward the moving member 230, and the convex surface portion defines a protrusion 233 structure as a slider, and the number of the sliders may be one or more, and preferably, the surface of the convex surface portion is in a convex arc shape to reduce sliding resistance.

When the arm 20 is located at the first position, the slider extends into the first groove to fit with the first groove.

When the arm 20 is located at the second position, the slider extends into the second groove to fit with the second groove.

During the rotation of the arm 20 from the first position to the third position, the slider slides along the first sidewall of the first groove and approaches the first hump structure, so that the movable member 230 is pushed up by the rotating member 220 and compresses the elastic member 100, wherein,

when the external force applied to the horn 20 is removed and the horn 20 does not exceed the third position, the elastic body 100 releases elastic potential energy to push the moving member 230 to make the moving member 230 lean against the rotating member 220, in the process, the slider slides along the first side wall surface of the first groove and is away from the first hump structure, so that the rotating member 220 rotates relative to the moving member 230 until the slider returns to the position matched with the first groove again, and the horn 20 is correspondingly reset to the first position;

when the arm 20 exceeds the third position, the elastic member 100 releases elastic potential energy to push the moving member 230 to make the moving member 230 lean against the rotating member 220, in the process, the slider slides along the first side wall surface of the second groove and is away from the first hump structure, so that the rotating member 220 rotates relative to the moving member 230 until the slider reaches a position engaged with the second groove, and the arm 20 correspondingly resets to the second position.

Preferably, as shown in fig. 3, the movable member 230 is provided with a movable member shaft hole 232, a portion of the rotating shaft 210 is inserted into the movable member shaft hole 232, and the movable member 230 moves along the axial direction of the rotating shaft 210 to compress or release the elastic body 100. Through making form the shaft hole cooperation between moving part 230 and the pivot 210, on the one hand, accessible pivot 210 location between moving part 230 and the rotation piece 220, thus, ensure that the cam drive between moving part 230 and the rotation piece 220 is high-efficient, accurate, steady, ensure pivot subassembly 200 self-locking function reliability, on the other hand, pivot 210 can be for the motion direction of moving part 230, make moving part 230 can be along the axial compression of pivot 210 or release elastomer 100, thereby the flexible direction of corresponding control elastomer 100, more do benefit to the high efficiency nature of guaranteeing elastomer 100 energy storage and energy release like this, improve the atress effect of elastomer 100 simultaneously, the life of extension elastomer 100.

Preferably, as shown in fig. 3 and 4, a portion of the elastic body 100 corresponding to the movable member 230 is configured with a second boss 122, and the second boss 122 of the elastic body 100 abuts against the movable member 230. Wherein, the second boss 122 abuts against the movable element 230, which strengthens the elastic capability of the part of the elastic body 100 for abutting against the movable element 230, thereby further strengthening the vibration reduction and absorption effect of the elastic body 100 on the rotating shaft 210. And the design of the second boss 122 is favorable for prolonging the matching length of the elastic body shaft hole 110 and the rotating shaft 210 and strengthening the stability of the rotating shaft 210 on the premise of not excessively increasing the volume of the elastic body 100.

For example, as shown in fig. 4, the second boss 122 is a circular cylindrical body, and the movable member 230 is located at one axial end of the circular cylindrical body and abuts against the circular cylindrical body.

Further, the movable member 230 is connected to the elastic body 100. Because the elastic body 100 is connected with one of the horn 20 or the body 30, the movable piece 230 is connected with the elastic body 100, and the movable piece 230 and the one of the horn 20 or the body 30 can be further fixed relatively, so that the elastic body 100 can absorb and intercept the vibration transmitted by the movable piece 230, the vibration problem of the body 30 is improved, the rotation of the movable piece 230 along with the rotating piece 220 is limited, the cam matching precision between the movable piece 230 and the rotating piece 220 is improved, and the self-locking effect between the horn 20 and the body 30 is improved. In addition, the elastic body 100 is connected with the movable member 230, and the movable amount of the movable member 230 relative to the elastic body 100 can be limited, so that the mutual friction between the movable member 230 and the elastic body 100 is limited, and the abrasion of the elastic body 100 is prevented.

In one example, the movable member 230 is bonded to the elastic body 100. In more detail, for example, the movable member 230 and the elastic body 100 are fixed by adhering the opposite surfaces of the movable member 230 and the elastic body 100 together by using an adhesive substance such as glue, double-sided tape, or the like.

In another example, as shown in fig. 5, one of the movable member 230 and the elastic member 100 is provided with a protrusion 233, and the other is provided with a recess 124, and the protrusion 233 is inserted into the recess 124 to fix the movable member 230 and the elastic member 100.

For the second example, optionally, the number of the protrusions 233 and the number of the recesses 124 may be the same, so that the protrusions 233 and the recesses 124 may be assembled in a one-to-one manner, and of course, the number of the protrusions 233 may be less than the number of the recesses 124, so that the protrusions 233 and a part of the recesses 124 are assembled in a plugging manner.

The number of the protrusions 233 may be one, the number of the recesses 124 may be designed to be one, and the recesses 124 are disposed corresponding to the protrusions 233. Preferably, the protrusion 233 is eccentrically disposed with respect to the center line of the rotating shaft 210, such that the protrusion 233 and the recess 124 are coupled to transmit torque between the movable member 230 and the elastic body 100, and prevent the movable member 230 from rotating with respect to the elastic body 100. Of course, this does not exclude the case where the protrusion 233 is concentrically disposed with the rotation shaft 210, and when only one protrusion 233 is concentrically disposed with the rotation shaft 210, a form between the protrusion 233 and the recess 124 may be designed to be adapted to restrict the rotation of the protrusion 233 in the recess 124, for example, the protrusion 233 may be designed to have a non-circular cross section, which may also prevent the movable member 230 from rotating with respect to the elastic body 100.

Alternatively, the number of the protrusions 233 may be multiple, and the number of the recesses 124 may be correspondingly designed to be multiple, so that the protrusions 233 are inserted into the recesses 124 in a one-to-one correspondence. For example, as shown in fig. 5, the movable member 230 is provided with a plurality of protrusions 233, and the plurality of protrusions 233 are arranged around the movable member 230 at intervals in the circumferential direction, so that the transmission of the torque between the movable member 230 and the elastic body 100 is more uniform, and the stress effect of the movable member 230 and the elastic body 100 is improved. Preferably, the protrusions 233 are cylindrical.

Of course, it is to be understood that the above examples one and two may also be combined in a non-conflicting manner.

In addition, it can be understood that the design is not limited to the first example and the second example, and there are various ways for connecting the movable element 230 and the elastic body 100, for example, the movable element 230 and the elastic body 100 may be optionally designed to be combined into a whole in an overmolding manner, and the like, and the connection form between the elastic body 100 and the movable element 230 is not exhaustive here, but the present design concept is not departing from the protection scope of the present disclosure.

Besides, it is understood that the design is not limited to the form of the above-mentioned embodiment 6, and in other embodiments, the movable member 230 may not be designed, but the first cam structure 231 is provided on the elastic body 100, and the second cam structure 223 is provided on the rotating member 220, so that the elastic body 100 and the rotating member 220 form a cam transmission fit.

Example 7:

in addition to the features of any of the embodiments described above, there is further defined: the shaft 210 is a steel member. For example, the shaft 210 is a carbon steel shaft. The vibration absorption device has the advantages of low cost, strong rigidity, difficulty in deformation and the like, ensures smooth rotation between the horn 20 and the machine body 30, and is favorable for ensuring the matching precision of the rotating shaft 210 and the elastic body 100, thereby ensuring the vibration absorption effect of the elastic body 100 on the rotating shaft 210, ensuring the matching precision of the rotating part 220 and the moving part 230, and ensuring the self-locking precision between the horn 20 and the machine body 30.

Example 8:

in addition to the features of any of the embodiments described above, there is further defined: the elastic body 100 is a rubber body or a super rubber body. The rubber body and the high-strength rubber body can have good vibration absorption performance and resilience performance, so that the vibration reduction effect on the machine body 30 is further improved, and the self-locking precision and the reliability of the self-locking function between the machine arm 20 and the machine body 30 are further improved.

Example 9:

as shown in fig. 2, in addition to the features of any of the above embodiments, further defined are: the elastic body 100 is configured with a plurality of connecting portions 123, the connecting portions 123 are used for connecting with one of the horn 20 and the body 30, and at least two connecting portions 123 of the plurality of connecting portions 123 are axially symmetrically distributed. In this embodiment, the plurality of connecting portions 123 are axially and symmetrically distributed between at least two of the connecting portions, so that the elastic body 100 can have at least two connecting positions symmetrically distributed, and the elastic body 100 is not easily rotated relative to the arm 20 or the body 30 connected thereto, thereby improving the assembly stability of the elastic body 100 and further enhancing the vibration damping effect of the elastic body 100.

Further, as shown in fig. 2, at least two connection portions 123 of the plurality of connection portions 123 use the center line of the rotating shaft assembly 200 as a vertex to form an included angle.

In more detail, the rotating shaft assembly 200 includes a rotating shaft 210, a center line of the rotating shaft assembly 200 can be understood as a center line or an axis of the rotating shaft 210, as shown in fig. 2, the rotating shaft 210 is arranged perpendicular to the paper, the center line can be understood with reference to a point O, the elastic body 100 is provided with two connecting portions 123, a ray is led out from the point O through the center of one connecting portion 123, a ray is led out from the point O through the center of the other connecting portion 123, the two rays form an included angle a, and it can be understood that the two connecting portions 123 substantially form a shape of the included angle a. The shape design of the angle shape is beneficial to improving the stability of the elastic body 100, so that after the two connecting portions 123 are respectively connected with the horn 20 or the body 30, the elastic body 100 is not easy to rotate relative to the horn 20 or the body 30 along with the rotating member 220, and the vibration damping effect of the elastic body 100 is further enhanced.

Preferably, as shown in fig. 2, the connecting portion 123 includes a lug 1231, and the lug 1231 is located at the edge of the elastic body 100. The lug 1231 is used for being connected with the horn 20 or the body 30, and the lug 1231 is designed to be located at the edge of the elastic body 100, so that a certain distance is formed between the part of the elastic body 100, which is used for being connected with the horn 20 or the body 30, and the center line of the rotating shaft 210 to form a moment arm, so that the anti-rotation effect of the elastic body 100 can be further strengthened, and at the same time, the rotating shaft 210 is avoided, and the interference between the rotating shaft 210 and the fastener 40 for locking the elastic body 100 and the horn 20 or the body 30 is prevented.

Further, as shown in fig. 2 and 3, the boss 1231 is provided with a mounting hole 1232, as shown in fig. 11 and 12, the mounting hole 1232 is used for being assembled with a fastener 40 (e.g., a screw) to be fixed to one of the horn 20 and the body 30. Not only has simple structure, the effect of easily processing and assembly, and can promote the fastening effect to elastomer 100 and horn 20 or fuselage 30, avoids elastomer 100 to rock, so with the effect of promoting the vibration absorption of elastomer 100, damping.

Example 10:

in addition to the features of any of the embodiments described above, there is further defined: when the horn 20 rotates to a first position relative to the body 30, the horn 20 is in a deployed state relative to the body 30; when the horn 20 rotates to the second position relative to the body 30, the horn 20 is in a folded state relative to the body 30. Thus, the function of automatically driving the arm 20 to the folded position or the unfolded position by releasing the elastic potential energy by the elastic body 100 after releasing the arm 20 is realized, the use is convenient, and the cam transmission matching mechanism between the rotating member 220 and the moving member 230 can be simplified.

It is to be understood that any one or more of the above embodiments 1 to 9 may be combined in a non-conflicting manner, and will not be described herein again.

As shown in fig. 6 to 12, an embodiment of the second aspect of the present application provides a rack including: the connecting structure 10 described in any of the above embodiments; a horn 20 connected to one of the elastic body 100 and the rotation shaft assembly 200 of the connection structure 10; and a body 30 connected to the other of the elastic body 100 and the rotary shaft assembly 200.

The rack provided by the above embodiment of the present application has all the above beneficial effects by providing the connecting structure 10 in any one of the above technical solutions, which is not described herein again.

Preferably, as shown in fig. 11, one of the horn 20 and the body 30 for connecting with the elastic body 100 is provided with a fixing hole 33 and a relief hole 31, the relief hole 31 is for relieving the rotating shaft assembly, the fixing hole 33 is opposite to the mounting hole 1232 of the elastic body 100, the fastener 40 penetrates through the fixing hole 33 and the mounting hole 1232, and locks the one of the horn 20 and the body 30 for connecting with the elastic body 100.

Further, as shown in fig. 11, one of the horn 20 and the body 30 for connecting with the elastic body 100 is further provided with a positioning portion 32, and the positioning portion 32 is used for abutting against the elastic body 100, so that the mounting hole 1232 and the fixing hole 33 are quickly aligned.

For example, as shown in fig. 11, the positioning portion 32 is a rib, and the rib abuts against the side wall surface of the elastic body 100 to position the elastic body 100. More in detail, the convex rib is in an included angle shape, the vertex position of the convex rib leans against the concave angle formed by the two connecting parts 123, the positioning guidance performance is better, the convex rib has higher strength, and the elastic body 100 is assisted to be limited to a certain extent.

The specific embodiment is as follows:

the rack that this embodiment provided, it includes: horn 20, fuselage 30, and attachment structure 10. A set of connecting structures 10 may be disposed between the horn 20 and the fuselage 30, or as shown in fig. 6, 9, and 10, a plurality of sets of connecting structures 10 may be disposed between the horn 20 and the fuselage 30. Wherein each set of connecting structures 10 is respectively connected with the horn 20 and the fuselage 30, and enables the horn 20 to rotate relative to the fuselage 30, and enables the rotation of the horn 20 relative to the fuselage 30 to have a first position and a second position, wherein, when the horn 20 rotates to the first position relative to the fuselage 30, the horn 20 is in a deployed state relative to the fuselage 30; when the horn 20 rotates to the second position relative to the body 30, the horn 20 is in a folded state relative to the body 30.

Preferably, as shown in fig. 6 and 9, two sets of connecting structures 10 are disposed between the horn 20 and the body 30, and preferably, the two sets of connecting structures 10 are arranged and distributed at intervals along the axial direction of the rotating shaft 210.

Each set of connection structures 10 includes: an elastomer 100 and a spindle assembly 200.

The elastic body 100 is a rubber body or a super rubber body, and the elastic body 100 is connected with the body 30.

The rotating shaft assembly 200 includes a rotating shaft 210, a rotating member 220 and a movable member 230, wherein the rotating shaft 210 is a steel member, and the rotating member 220 and the movable member 230 can be plastic members. As shown in fig. 3, the elastic body 100 is provided with an elastic body shaft hole 110, the movable member 230 is provided with a movable member shaft hole 232, the rotatable member 220 is provided with a rotatable member shaft hole 222, the rotating shaft 210 is inserted into the elastic body shaft hole 110, the movable member shaft hole 232, and the rotatable member shaft hole 222, the movable member 230 is located between the elastic body 100 and the rotatable member 220, and the movable member 230 is connected to the elastic body 100, specifically, as shown in fig. 5, the movable member 230 is inserted into the elastic body 100 through the protrusion 233 and the. The surface of the movable member 230 corresponding to the rotating member 220 is configured with a first cam structure 231, the surface of the rotating member 220 corresponding to the movable member 230 is configured with a second cam structure 223, and the first cam structure 231 and the second cam structure 223 form a cam transmission fit.

Wherein, the rotating member 220 can rotate relative to the moving member 230, so that the moving member 230 compresses or releases the elastic body 100. Specifically, when the contact point of the rotating member 220 and the moving member 230 reaches the highest point of the cam, the elastic body 100 is compressed, and when the contact point of the rotating member 220 and the moving member 230 avoids the highest point of the cam, the elastic body 100 is released, and the elastic restoring force generated by the elastic body 100 drives the rotating member 220 to rotate, so that the arm 20 automatically rotates to the first position or the second position.

In more detail, the first cam structure 231 may be specifically referred to as a groove as shown in fig. 5, and the second cam structure 223 may be specifically referred to as a slider as shown in fig. 5. The opposite side wall surfaces of the groove are configured as inclined surfaces or curved surfaces and the opening of the groove is gradually enlarged, and the rotation member 220 rotates relative to the movable member 230 so that the slider slides along the side wall surfaces of the groove. Adjacent side wall surfaces of adjacent grooves are connected and define a convex peak structure 2311, and the vertex of the convex peak structure 2311 is formed as the highest point of the cam.

The ratio of the axial length of the portion of the rotating shaft 210 in the elastic body shaft hole 110 to the total axial length of the rotating shaft 210 is greater than or equal to 1/4. And the rotating shaft 210 and the elastomer shaft hole 110 are in transition fit or interference fit.

The first stopping portion 211 is disposed at one axial end of the rotating shaft 210, the second stopping portion 212 is disposed at the other axial end of the rotating shaft, and the elastic body 100, the movable element 230, and the rotating element 220 are limited between the first stopping portion 211 and the second stopping portion 212.

A first boss 121 is formed at a position of the elastic body 100 corresponding to the first stopper portion 211, and the first boss 121 of the elastic body 100 abuts against the first stopper portion 211. The portion of the elastic body 100 corresponding to the movable member 230 is configured with a second boss 122, and the second boss 122 of the elastic body 100 abuts against the movable member 230.

The outer contour line 221 of the section of the rotation member 220 taken by a plane perpendicular to the center line of the rotation shaft 210 is non-circular, and as shown in fig. 9, the rotation member 220 is inserted into the coupling hole 21 of the horn 20, wherein the outer contour line 221 is adapted to the shape of the inner circumferential contour of the coupling hole 21.

In addition, the elastic body 100 is configured with a plurality of connecting parts 123, the connecting parts 123 are connected with the body 30, and at least two connecting parts 123 in the plurality of connecting parts 123 are axially symmetrically distributed. Further, at least two connection portions 123 of the plurality of connection portions 123 construct an included angle shape with the center line of the rotating shaft assembly 200 as a vertex.

Preferably, the connecting portion 123 includes a lug 1231, and the lug 1231 is located at the edge of the elastic body 100.

Further, the lug 1231 is provided with a mounting hole 1232, and the mounting hole 1232 is used for being assembled with the fastener 40 to be fixed to the body 30.

In contrast, in the existing rack, the arm and the body are connected by a rotating shaft assembly (also called a rotating shaft), and the rotating shaft assembly includes: the rotating shaft is connected with the machine body through the upper cam, the lower cam is sleeved on the rotating shaft, one end of the lower cam abuts against the upper cam, the other end of the lower cam abuts against the spring, and the barrel is sleeved on the outer sides of the spring and the lower cam and connected with the machine arm. In the structure, the positioning is realized through the matching of the upper cam, the lower cam and the spring. The disadvantages are that: on one hand, the spring is adopted to provide elastic force, so that the structure of the rotating shaft assembly is complex, and the structural size design is limited. On the other hand, the spring is used as an elastic element, so that the rigidity of the existing rotating shaft assembly in the folding direction is small, the rigidity in other directions is very high, and the vibration damping function of the rotating shaft assembly is poor.

The connecting structure 10 of the rack provided in this embodiment is different from an existing rotating shaft assembly, and specifically, the connecting structure 10 includes a rotating shaft 210, an elastic body 100 (such as rubber, acrylic rubber, etc.), a rotating member 220, a movable member 230, a fixing member 2121, etc., where the rotating member 220 is fixed to the arm 20, and rotates with the arm 20, and during the rotation process, the movable member 230 is acted by the acting force of the rotating member 220 to move upward to compress the elastic body 100, and the elastic body 100 generates an elastic force after being deformed, and the elastic force reaches a maximum value after rotating by a certain angle (that is, when a contact point of the first cam structure 231 and the second cam structure 223 is at a position of a highest point of the cam), and then the elastic body 100 releases elastic potential energy to enable the rotating member 220 to automatically rotate to a certain angle.

Compared with the prior art, the structure has the advantages that the elastic body 100 is adopted to absorb vibration and reduce vibration and store energy and release energy, so that the size of the whole connecting structure 10 can be greatly reduced, and the number of parts of the whole connecting structure 10 is reduced. And wherein, the elastic body 100 is installed on the fuselage 30 through the two installation holes 1232 (or more) of the fastening member 40, so that the fuselage 30 is isolated from the horn 20 by the elastic body 100, thus, the mode of the elastic system composed of the horn 20+ the elastic body 100 can be changed by designing the size of the elastic body 100, etc., so as to better isolate the vibration of the horn 20, reduce the vibration amplitude of the fuselage 30, and improve the vibration performance of the fuselage 30.

In order to further verify the vibration damping effect brought by the connecting structure 10 of the frame to the horn 20 and the fuselage 30 of the frame in this embodiment, on the four-axis unmanned aerial vehicle, the other conditions are kept substantially the same, a test is performed with a variable as the connecting structure 10 (currently, a rotating shaft assembly), and the vibration acceleration amplitudes of the horn 20 and the fuselage 30 are respectively detected. The following will describe the vibration of the arm 20 and the body 30 according to the present design in comparison with the vibration of the conventional arm and body with respect to the above test result data:

fig. 13a is a graph showing the relationship between frequency and acceleration amplitude of the body 30 in the gantry according to the present embodiment. In the frame, a machine arm 20 is connected with a machine body 30 through a connecting structure 10 of the embodiment;

FIG. 13b is a graph of frequency versus acceleration amplitude for a fuselage in a conventional airframe. In the frame, the machine arm is connected with the machine body through the existing rotating shaft component (also called rotating shaft).

Comparison table of maximum values of fuselage acceleration amplitude

From the above comparison results, the maximum value of the acceleration amplitude of the fuselage 30 of the embodiment shows a reduced variation result in the x, y, and z directions compared with the maximum value of the acceleration amplitude of the existing fuselage, and from the reduced amplitude, it can be known that the connection structure 10 is adopted to connect the fuselage 30 and the horn 20 in the embodiment, and compared with the existing case of connecting the fuselage 30 and the horn 20 by using the rotating shaft assembly (also called rotating shaft), the comprehensive vibration amplitude of the fuselage 30 is reduced by at least 30%, so that the performance of the structure and the internal components of the fuselage 30 can be greatly optimized, and the performance of the aircraft can be greatly improved. Taking fig. 11 as an example, according to a coordinate setting rule, a coordinate system is established by the body 30, one of the length extending directions of the body 30 points in the x direction, one of the width directions of the body 30 points in the y direction, and one of the up-down directions of the body 30 points in the z direction.

Fig. 14a is a graph showing the relationship between the frequency and the acceleration amplitude of the horn 20 in the gantry according to the present embodiment. In the frame, a machine arm 20 is connected with a machine body 30 through a connecting structure 10 of the embodiment;

fig. 14b is a graph of frequency versus acceleration amplitude for the horn 20 in the prior art gantry. In the machine frame, the machine arm 20 and the machine body 30 are connected through a conventional rotating shaft assembly (also called a rotating shaft).

Comparison table of maximum values of acceleration amplitude of horn

Direction of acceleration amplitude	Arm of the embodiment	Existing horn	Change of state
				x	1022m/s²	1172m/s²	Descend
y	1199m/s²	1373m/s²	Descend
				z	1713m/s²	2362m/s²	Descend

From the above comparison results, the maximum value of the acceleration amplitude of the horn 20 of the present embodiment shows a decreasing change result in the x, y, and z directions compared to the maximum value of the acceleration amplitude of the existing horn, and from the decreasing, it can be known that the present embodiment adopts the connection structure 10 to connect the fuselage 30 and the horn 20, and compared with the existing case of adopting the rotating shaft assembly (also called rotating shaft) to connect the fuselage 30 and the horn 20, the comprehensive vibration amplitude of the horn 20 is reduced by about 30%, the shaking of the horn 20 can be reduced, the flight stability and the control accuracy can be improved, and the structure and the internal component performance of the fuselage 30 can be further greatly optimized.

Moreover, it can be understood that, in the two sets of experiments, the variables are the connecting structure 10 (in this embodiment) and the rotating shaft assembly (in the prior art), so that the vibration reduction effect obtained by the connecting structure 10 in the embodiment of the first aspect compared to the prior rotating shaft assembly can also be demonstrated by referring to the above experimental conclusion, and is not described herein again.

Embodiments of the third aspect of the present application provide an aircraft, including a power system and the airframe as described in any of the above embodiments, where the power system is disposed on the airframe arm 20, and is used for providing flight power for the aircraft.

The aircraft that this application above-mentioned embodiment provided is through being provided with the frame among the above-mentioned arbitrary technical scheme to have above all beneficial effects, no longer give unnecessary details here.

Preferably, as shown in fig. 6, 7 and 8, the horn 20 has opposite first and second ends 22a and 22b, the connecting structure 10 is connected to the first end 22a of the horn 20, and the power system is connected to the second end 22 b.

Alternatively, the power system may include a motor and a rotor driven to rotate by the motor.

Optionally, the aircraft is a drone.

To sum up, the connection structure, frame and aircraft that this application provided, in the connection structure, adopt this elastomer (for example rubber, super power glue etc.) to provide elasticity, promote the horn to carry out automatic re-setting, simultaneously, the elastomer can directly be regarded as the part that pivot and fuselage are connected, realize that the elastomer vibrates the interception between fuselage and horn, on the one hand, compared with current pivot, shortened the holistic length of pivot or connection structure, reduce the holistic volume of pivot or connection structure, make connection structure's design more free, and also more do benefit to the miniaturized design of aircraft, on the other hand, the elastomer is as the adapting unit of connection structure and fuselage, all possess the damping function in all directions, and compared with current structure that has the spring to carry out the energy storage, the structure of discharging and the structure of extra damping system, when realizing reducing product volume size, the vibration reduction effect on the machine body is better.

In this application, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A connection structure for rotational connection of a horn to a fuselage such that the horn is rotatable relative to the fuselage and is maintained in a predetermined position relative to the fuselage, wherein the connection structure comprises:

an elastic body for connecting with one of the horn and the body;

the rotating shaft assembly is connected with the elastic body and is used for being connected with the other one of the machine arm and the machine body, so that the machine arm has at least one stroke interval relative to the rotation of the machine body;

the rotating shaft assembly is also used for abutting and compressing the elastic body in the process that the machine arm is close to the third position, and the elastic body is also used for enabling the machine arm to automatically rotate to the first position or the second position when the machine arm exceeds the third position.

2. The connection structure according to claim 1, wherein the rotary shaft assembly includes:

the rotating shaft is connected with the elastic body;

the rotating part is arranged on the rotating shaft, can rotate around the rotating shaft, is used for being connected with the other one of the machine arm and the machine body, and is in transmission fit with the elastic body;

the elastic body is compressed in the process that the rotating piece rotates to enable the machine arm to be close to the third position, when the rotating piece rotates to enable the machine arm to exceed the third position, the elastic body is released, and the elastic restoring force generated by the elastic body enables the rotating piece to drive the machine arm to rotate to the first position or the second position.

3. The connection structure according to claim 2,

the elastic body is provided with an elastic body shaft hole, and one part of the rotating shaft is sleeved in the elastic body shaft hole in a penetrating manner.

4. The connection structure according to claim 3,

the proportion of the axial length of the part of the rotating shaft in the elastic body axial hole to the total axial length of the rotating shaft is greater than or equal to 1/4.

5. The connection structure according to claim 3,

the rotating shaft and the elastic body shaft hole are in transition fit or interference fit.

6. The connection structure according to claim 2,

the rotating shaft is provided with a first stopping portion and a second stopping portion, the first stopping portion and the second stopping portion are distributed at intervals along the axial direction of the rotating shaft, and the rotating shaft is located between the first stopping portion and the second stopping portion and is connected with the elastic body and the rotating member, so that the elastic body and the rotating member are axially limited between the first stopping portion and the second stopping portion.

7. The connection structure according to claim 6,

one of the first stopping portion and the second stopping portion is a stopping structure integrally formed on the rotating shaft, and the other one is a fixing member assembled and connected with the rotating shaft.

8. The connection structure according to claim 6,

the first stopping portion is located at one axial end of the rotating shaft and abuts against the elastic body.

9. The connection structure according to claim 8,

the first stopping part is provided with a stopping end surface, and the stopping end surface is arranged along the outer circumference of the rotating shaft and is abutted against the elastic body.

10. The connection structure according to claim 8,

the elastic body is provided with a first boss corresponding to the first stopping part, and the first boss of the elastic body is abutted against the first stopping part.

11. The connection structure according to claim 2,

the outer contour line of the cross section formed by a plane perpendicular to the central line of the rotating shaft of the rotating part is non-circular, and the rotating part is used for being inserted into a connecting hole on the other one of the machine arm and the machine body;

wherein the outer contour line is adapted to the shape of the inner circumferential contour of the coupling hole.

12. The connection structure according to claim 11,

the outer contour line comprises an unsealed circular arc line segment and a connecting line segment, and the circular arc line segment and the connecting line segment are connected in a staggered mode;

the connecting line segment is a straight line segment, a broken line segment or an arc line segment with curvature different from that of the circular arc line segment.

13. The connection structure according to claim 2,

the rotating piece is provided with a rotating piece shaft hole, and one part of the rotating shaft is connected in the rotating piece shaft hole in a penetrating mode, so that the rotating piece can rotate around the rotating shaft.

14. The connection structure according to claim 2, wherein the rotary shaft assembly further comprises:

the movable piece and the rotating piece form cam transmission fit, and the rotating piece can rotate relative to the movable piece so that the movable piece compresses or releases the elastic body;

when the contact point of the rotating piece and the moving piece reaches the highest point of the cam, the elastic body is compressed, and when the contact point of the rotating piece and the moving piece avoids the highest point of the cam, the elastic body is released, and the elastic restoring force generated by the elastic body drives the rotating piece to rotate, so that the machine arm automatically rotates to the first position or the second position.

15. The connection structure according to claim 14,

the elastomer is located the moving part is followed the axial one side of pivot, rotate the piece and be located the moving part is followed the axial opposite side of pivot, the moving part correspond to the surface structure of rotating the piece has first cam structure, it corresponds to rotate the surface structure of moving part has second cam structure, first cam structure with second cam structure forms cam drive cooperation.

16. The connection structure according to claim 15,

one of the first cam structure and the second cam structure comprises a sliding block, the other cam structure comprises a plurality of grooves, two opposite side wall surfaces of the grooves are configured to be inclined surfaces or arc surfaces, the openings of the grooves are gradually enlarged, and the rotating piece rotates relative to the movable piece to enable the sliding block to slide along the side wall surfaces of the grooves.

17. The connection structure according to claim 16,

and adjacent side wall surfaces of adjacent grooves are connected with each other and define a convex peak structure, and the peak of the convex peak structure is formed as the highest point of the cam.

18. The connection structure according to claim 14,

the movable piece is provided with a movable piece shaft hole, one part of the rotating shaft is sleeved in the movable piece shaft hole in a penetrating mode, and the movable piece moves along the axial direction of the rotating shaft to compress or release the elastic body.

19. The connection structure according to claim 14,

the elastic body is provided with a second boss corresponding to the movable piece, and the second boss of the elastic body is abutted against the movable piece.

20. The connection structure according to claim 14,

the movable piece is connected with the elastic body.

21. The connection structure according to claim 20,

the movable piece is bonded with the elastic body.

22. The connection structure according to claim 20,

one of the moving part and the elastic body is provided with a bulge, the other one is provided with a depressed part, and the bulge is inserted in the depressed part to fix the moving part and the elastic body.

23. The connection structure according to claim 2,

the rotating shaft is a steel part.

24. The connection structure according to claim 1,

the elastic body is a rubber body or a super rubber body.

25. The connection structure according to claim 1,

the elastic body is configured with a plurality of connecting parts, the connecting parts are used for being connected with the one of the machine arm and the machine body, and at least two of the connecting parts are in axisymmetrical distribution.

26. The connecting structure according to claim 25,

and at least two of the connecting parts use the central line of the rotating shaft assembly as a vertex to construct an included angle model.

27. The connecting structure according to claim 25,

the connecting portion includes a lug at the elastomeric edge.

28. The connecting structure according to claim 27,

the lug is provided with a mounting hole for fitting with a fastener to be fixed to the one of the horn and the body.

29. The connection structure according to claim 1,

when the horn rotates to the first position relative to the fuselage, the horn is in a deployed state relative to the fuselage;

when the horn rotates to the second position relative to the fuselage, the horn is in a folded state relative to the fuselage.

30. A rack, comprising:

the connecting structure of any one of claims 1 to 29;

a horn connected to one of the elastic body of the connection structure and the rotary shaft assembly;

a body connected to the other of the elastic body and the rotary shaft assembly.

31. An aircraft comprising a airframe as defined in claim 30 and a power system provided on an arm in the airframe for providing flight power to the aircraft.