CN107757890B - Unmanned plane - Google Patents
Unmanned plane Download PDFInfo
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- CN107757890B CN107757890B CN201710954342.0A CN201710954342A CN107757890B CN 107757890 B CN107757890 B CN 107757890B CN 201710954342 A CN201710954342 A CN 201710954342A CN 107757890 B CN107757890 B CN 107757890B
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- cylinder
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- rod
- shaped body
- cylinder body
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C25/00—Alighting gear
- B64C25/32—Alighting gear characterised by elements which contact the ground or similar surface
- B64C25/58—Arrangements or adaptations of shock-absorbers or springs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C25/00—Alighting gear
- B64C25/32—Alighting gear characterised by elements which contact the ground or similar surface
- B64C25/58—Arrangements or adaptations of shock-absorbers or springs
- B64C25/62—Spring shock-absorbers; Springs
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Vehicle Body Suspensions (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses an unmanned aerial vehicle, which comprises a main body, a propeller arranged at the upper part of the main body and a bracket system arranged at the bottom of the main body, wherein the bracket system comprises: a first bracket formed with a cylinder; a second bracket formed with a rod-shaped body extending into the cylinder body; a first spring provided in the cylinder body; wherein: the operation of the rod-shaped body in the cylinder and the deformed state of the first spring are arranged such that: when the rod-shaped body extends into the cylinder body to a greater depth or the rod-shaped body extends into the cylinder body to a smaller depth, the first spring is compressed and restored for a plurality of times. When the rod-shaped body is stretching into the in-process of the degree of depth increase of cylinder body or the rod-shaped body is stretching into the less in-process of the degree of depth of cylinder body, first spring carries out the deformation that compresses many times-resets to every buffering cycle can make first spring carry out a plurality of elastic deformation cycles, thereby can be fast with the kinetic energy consumption when unmanned aerial vehicle lands, thereby play better cushioning effect.
Description
Technical Field
The invention relates to an aircraft, in particular to an unmanned aerial vehicle.
Background
At present, the unmanned aerial vehicle as the aircraft is widely used in each field, and generally, unmanned aerial vehicle includes the main part, sets up in the screw of main part top, sets up in the support of main part below. The main body is used for mounting functional components, power components and the like. The role of the stent is two: firstly, the unmanned aerial vehicle that corresponds not flight plays the effect of outrigger, secondly, unmanned aerial vehicle plays buffering and shock attenuation effect to the unmanned aerial vehicle when falling to the ground and is used for preventing that unmanned aerial vehicle from receiving great impact and making the part on the unmanned aerial vehicle damage or not hard up when the whereabouts.
In the prior art, the support with the functions of buffering and shock absorption is generally realized by using a spring. Specifically, divide into two parts with the support, namely, first support and second support, first support is fixed in the bottom of main part, has the cylinder body on the first support, and the second support is located first support below for with ground contact, have the piston rod that stretches into in the cylinder body on the second support, the spring setting is in the cylinder body. When unmanned aerial vehicle vertical fall in the in-process on ground, the second support contacts ground at first, ground is to second support recoil power (or call impact force) conduction to piston rod, the relative cylinder body of piston rod moves up, the spring is compressed by the piston rod this moment, the spring has the effect that slows down the piston rod and move up in compression process, along with the continuous quilt compression of spring, or call along with the piston rod stretches into the degree of depth continuous increase of cylinder body, the spring is to the effort continuous increase of piston rod, this kind of increase does not have the benefit to the buffering. From the angle of atress analysis, the spring is to the increase of piston rod effort confronts the reaction force of ground to the support for unmanned aerial vehicle vibrations increase, and this is exactly when the rigidity (the elastic coefficient) of spring is great (when the rigidity of spring reaches a certain degree, just do not have the cushioning effect), the reason that the cushioning effect almost disappears, however, when electing the spring that the elastic coefficient is less, the speed of piston rod can not effectively weaken again, and this can make the support become a flexible body, thereby also do not be favorable to the buffering. From the angle of energy conservation, the buffer process is the process with unmanned aerial vehicle's kinetic energy consumption in fact, and the kinetic energy consumption mainly realizes through the elastic deformation of spring, and because the piston rod carries out reciprocating motion in the cylinder body, the spring only can carry out once compressing and the deformation that resets for the kinetic energy that the spring consumed is less and slower, thereby leads to can not realize the quick buffering to unmanned aerial vehicle, and the cushioning effect is relatively poor.
Disclosure of Invention
Aiming at the technical problems in the prior art, the embodiment of the invention provides an unmanned aerial vehicle.
In order to solve the technical problem, the embodiment of the invention adopts the following technical scheme:
the utility model provides an unmanned aerial vehicle, includes the main part, set up in the screw on main part upper portion, set up in the mounting system of main part bottom, the mounting system includes:
a first bracket formed with a cylinder;
a second bracket formed with a rod-shaped body that extends into the cylinder block;
a first spring provided in the cylinder; wherein:
the operation of the rod-shaped body in the cylinder and the deformed state of the first spring are arranged such that:
when the rod-shaped body extends into the cylinder body to a greater depth or the rod-shaped body extends into the cylinder body to a lesser depth, the first spring is compressed and restored for a plurality of times.
Preferably, the cylinder block comprises a first cylinder block and a second cylinder block, and the second cylinder block is perpendicular to the first cylinder block and is communicated with the first cylinder block;
the rod-shaped body extends into the first cylinder body, a section of the rod-shaped body, which is used for extending into the first cylinder body, forms a screw rod section, a nut is arranged in the first cylinder body, and the screw rod penetrates through the nut and forms spiral transmission with the nut;
an eccentric wheel is sleeved on the nut;
a second spring is arranged in the first cylinder body and used for pushing the rod-shaped body downwards;
the second cylinder body is internally provided with a valve core and a contact part arranged on the valve core, and the first spring is used for pushing the valve core towards the direction of the eccentric wheel so as to enable the contact part to be in contact with the wheel surface of the eccentric wheel;
the elastic coefficient of the first spring is greater than that of the second spring.
Preferably, the upper end and the lower end of the eccentric wheel are provided with thrust bearings.
Preferably, a ratio of the spring constant of the first spring to the spring constant of the second spring is greater than 4.
Preferably, a first blocking ring is arranged on the screw rod section, a second blocking ring is arranged in the first cylinder body, and the second spring is arranged between the first blocking ring and the second blocking ring.
Preferably, a third check ring is arranged in the second cylinder, and the first spring is arranged between the third check ring and the valve core.
Preferably, the first cylinder and the second cylinder are disposed at a lower end of the first bracket, and the first cylinder is screwed with the second cylinder.
Preferably, the first support comprises an oblique beam and a cross beam, the oblique beam is connected with the cross beam to form a first cylinder, and the cross beam is connected with the oblique beam to form a second cylinder.
Preferably, the second bracket comprises a support rod, the rod-shaped body is arranged on the support rod, and the support rod is used for supporting the ground.
Compared with the prior art, the unmanned aerial vehicle provided by the embodiment of the invention has the beneficial effects that: in the process of unmanned aerial vehicle whereabouts ground, ground conducts to the rod-shaped body to the reaction force of second support, and the rod-shaped body constantly moves up and down in the cylinder body (i.e. the rod-shaped body is the degree of depth increase in the cylinder body and reduces after the increase) in order to realize buffering shock attenuation. The rod-shaped body achieves buffering in one cycle in the process of increasing the depth of the rod-shaped body extending into the cylinder body and reducing the depth of the rod-shaped body extending into the cylinder body. When the rod-shaped body is stretching into the in-process of the degree of depth increase of cylinder body or the rod-shaped body is stretching into the less in-process of the degree of depth of cylinder body, first spring carries out the deformation that compresses many times-resets to every buffering cycle can make first spring carry out a plurality of elastic deformation cycles, thereby can be fast with the kinetic energy consumption when unmanned aerial vehicle lands, thereby play better cushioning effect.
Drawings
Fig. 1 is a front view of an unmanned aerial vehicle according to an embodiment of the present invention.
Fig. 2 is a left side view of the drone provided by an embodiment of the present invention.
Fig. 3 is a sectional view taken along line a-a of fig. 1 (the first magnet is opposite to the second magnet in opposite polarity).
Fig. 4 is an enlarged view of a portion B of fig. 3.
Fig. 5 is a sectional view taken along line a-a of fig. 1 (the first magnet and the second magnet are homopolar and opposite).
Fig. 6 is an enlarged view of a portion C of fig. 5.
In the figure:
10-a first cylinder; 20-a second cylinder; 30-a screw section; 40-a nut; 50-eccentric wheel; 60-a valve core; 70-a first spring; 80-a thrust bearing; 81-a first body; 82-a second body; 91-a first baffle ring; 92-a second baffle ring; 93-a third baffle ring; 94-a second spring; 95-a first magnet; 96-a second magnet; 100-a stent system; 101-a first scaffold; 1011-oblique beam; 1012-beam; 102-a second support; 1021-a rod-shaped body; 1022-a support bar; 200-a body; 300-propeller.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-6, an embodiment of the present invention discloses an unmanned aerial vehicle, including a main body 200, a propeller 300 disposed on an upper portion of the main body 200, and a support system 100 disposed at a bottom portion of the main body 200, wherein the support system 100 includes: a first bracket 101, a second bracket 102, a first spring 70. The first bracket 101 is formed with a cylinder; the second bracket 102 is formed with a rod-shaped body 1021, the rod-shaped body 1021 extending into the cylinder; a first spring 70 is provided in the cylinder; the operation of the rod-shaped body 1021 in the cylinder and the deformed state of the first spring 70 are arranged such that: the first spring 70 is deformed by compression-return a plurality of times while the rod-shaped body 1021 is extended to an increased depth into the cylinder or while the rod-shaped body 1021 is extended to a smaller depth into the cylinder.
According to the above description, in the process of dropping the unmanned aerial vehicle on the ground, the reaction force of the ground to the second support 102 is transmitted to the rod-shaped body 1021, and the rod-shaped body 1021 continuously moves up and down in the cylinder (i.e. the depth of the rod-shaped body 1021 in the cylinder increases and decreases after increasing) to achieve the damping effect. The rod-shaped body 1021 achieves one cycle of cushioning during the process of increasing the depth of the rod-shaped body 1021 into the cylinder and decreasing the depth of the rod-shaped body 1021 into the cylinder. When the rod 1021 is stretching into the in-process of the degree of depth increase of cylinder body or the rod 1021 is stretching into the less in-process of the degree of depth of cylinder body, first spring 70 carries out the deformation that compresses many times-resets to every buffering cycle can make first spring 70 carry out a plurality of elastic deformation cycles, thereby can be fast with the kinetic energy consumption when unmanned aerial vehicle lands, thereby play better cushioning effect.
There are various structures that enable the first spring 70 to be deformed a plurality of times during one damping cycle of the rod-shaped body 1021, and in a preferred embodiment of the present invention, as shown in fig. 3 to 6, the cylinder includes a first cylinder 10 and a second cylinder 20, the second cylinder 20 being perpendicular to the first cylinder 10 and penetrating the first cylinder 10; the rod-shaped body 1021 extends into the first cylinder 10, a section of the rod-shaped body 1021, which is used for extending into the first cylinder 10, forms a screw rod section 30, a nut 40 is arranged in the first cylinder 10, and the screw rod penetrates through the nut 40 and forms screw transmission with the nut 40; the nut 40 is sleeved with an eccentric wheel 50; a second spring 94 is arranged in the first cylinder 10, and the second spring 94 is used for pushing the rod-shaped body 1021 downwards; a valve core 60 and a contact part arranged on the valve core 60 are arranged in the second cylinder 20, and the first spring 70 is used for pushing the valve core 60 towards the direction of the eccentric wheel 50 so as to enable the contact part to be in contact with the wheel surface of the eccentric wheel 50; the elastic coefficient of the first spring 70 is larger than that of the second spring 94. Preferably, thrust bearings 80 are provided at upper and lower ends of the eccentric wheel 50.
As can be seen from the above description, as shown in fig. 3 to 6, during the process that the rod-shaped body 1021 is continuously inserted into the cylinder or the rod-shaped body 1021 is continuously retracted from the cylinder, the screw section 30 on the rod-shaped body 1021 rotates the nut 40 through the screw transmission with the nut 40, the rotation of the nut 40 drives the eccentric 50 to rotate, the rotation of the eccentric 50 pushes the valve element 60 to reciprocate through the contact portion continuously via the tread, so that the first spring 70 realizes the multiple compression-return deformation of the first spring 70 during the process that the rod-shaped body 1021 is continuously inserted into the cylinder or the rod-shaped body 1021 is continuously retracted from the cylinder. The multiple compression-reset deformation of the first spring 70 can quickly consume the kinetic energy of the unmanned aerial vehicle, thereby realizing better and faster buffering and shock absorption.
It should be noted that: the second elasticity is set at the same position as the spring of the damper mechanism in the related art, however, the second spring 94 has a much smaller elastic modulus than the spring in the related art and the first spring 70 in the present invention because: the second spring 94 does not act as a consumer of the kinetic energy of the drone, but only serves to reset the rod-shaped body 1021 (i.e. to power the action of the rod-shaped body 1021 extending into the first cylinder 10 to a lesser depth).
As described above, the eccentric wheel 50 rotates a plurality of turns while the rod-shaped body 1021 continues to be inserted into the cylinder or while the rod-shaped body 1021 continues to be retracted from the cylinder, so that the first spring 70 can be compressed-restored and deformed a plurality of times. In fact, the reaction force of the contact portion to which the eccentric 50 is subjected during one rotation is different, for example, when the rotation angle of the eccentric 50 causes the first spring 70 to compress, the reaction force of the contact portion to the eccentric 50 acts to prevent the eccentric 50 from rotating; and when the rotation angle of the eccentric 50 causes the first spring 70 to return, the reaction force of the contact portion against the eccentric 50 serves to drive the eccentric 50 to rotate. The reaction force of the contact portion is transmitted to the lead screw end through the eccentric 50 and the nut 40, thereby generating an uneven force in the axial direction of the rod-shaped body 1021, which may affect the buffering and shock-absorbing effect.
In order to solve the above problems, in a preferred embodiment of the present invention, a thrust bearing 80 provided at a lower end of the eccentric wheel 50 is modified. As is known, the thrust bearing 80 includes a first body 81 and a second body 82 that are axially opposite, the first body 81 and the second body 82 being capable of relative rotation, the first body 81 being mounted on one of the components (e.g., on the nut 40 and capable of rotating with the nut 40), the second body 82 being mounted on the other component (e.g., on the first cylinder 10), thereby enabling the two components to rotate relative to each other (e.g., the nut 40 is enabled to rotate relative to the first cylinder 10). The key points of the invention are as follows: a first magnet 95 is provided on the first body 81 of the thrust bearing 80 provided at the lower end of the eccentric wheel 50, and a second magnet 96 opposed to the first magnet 95 is provided on the second body 82, the first magnet 95 and the second magnet 96 each being formed by abutting two arc-shaped magnet segments. And the opposite magnetic poles of the two butted arc-shaped magnet segments face the same direction. And the relative positions of the two arc-shaped magnet segments of the first magnet 95 and the two arc-shaped magnet segments of the second magnet 96 with respect to the rotation angle of the eccentric 50 are configured such that: as shown in fig. 3 and 4, when the eccentric 50 is rotated at such an angle that the contact portion slides to the point where the curvature of the tread of the eccentric 50 is maximum, the two arc-shaped magnet segments of the first magnet 95 and the two arc-shaped magnet segments of the second magnet 96 are opposite in polarity; as shown in fig. 3 and 4, when the eccentric 50 is rotated at such an angle that the contact portion slides to the point where the curvature of the tread of the eccentric 50 is minimum, the two arc-shaped magnet segments of the first magnet 95 and the two arc-shaped magnet segments of the second magnet 96 are opposite to each other in the same polarity. That is, when the eccentric 50 is rotated at such an angle that the first spring 70 is compressed by the maximum amount, the two arc-shaped magnet segments of the first magnet 95 and the two arc-shaped magnet segments of the second magnet 96 are opposite in polarity; when the rotation angle of the eccentric 50 is such that the first spring 70 is compressed by a minimum amount (or completely restored), the two arc-shaped magnet segments of the first magnet 95 and the two arc-shaped magnet segments of the second magnet 96 are opposite in the same polarity.
According to the above, when the eccentric wheel 50 rotates from the rotation angle that maximizes the compression amount of the first spring 70 to the rotation angle that minimizes the compression amount of the first spring 70, the first magnet 95 and the second magnet 96 are switched from opposite poles to opposite poles, and in the process, the reaction force of the contact portion is used to drive the eccentric wheel 50 to rotate, and the magnetic attraction generated between the first magnet 95 and the second magnet 96 prevents the eccentric wheel 50 from rotating, so that the magnetic attraction counteracts a part of the reaction force, and the eccentric wheel 50 is smoothly stressed in the rotation angle range; similarly, when the eccentric wheel 50 rotates from the rotation angle at which the compression amount of the first spring 70 is minimized to the rotation angle at which the compression amount of the first spring 70 is maximized, the first magnet 95 and the second magnet 96 are switched from the homopolar opposition to the heteropolar opposition, and in this process, the reaction force of the contact portion is used to prevent the eccentric wheel 50 from rotating, and the magnetic repulsion force generated between the first magnet 95 and the second magnet 96 drives the eccentric wheel 50 to rotate, so that the magnetic repulsion force counteracts a portion of the reaction force, and the eccentric wheel 50 is stressed smoothly in this rotation angle range. Thereby, the eccentric wheel 50 is stressed stably during one rotation, and the rod 1021 is stressed stably, i.e., the rod 1021 is stressed stably during the axial movement, thereby improving the stability of the rod 1021 during the buffering process.
In a preferred embodiment of the present invention, the ratio of the spring constant of the first spring 70 to the spring constant of the second spring 94 is greater than 4.
In a preferred embodiment of the present invention, the screw segment 30 is provided with a first stop ring 91, the first cylinder 10 is internally provided with a second stop ring 92, and the second spring 94 is arranged between the first stop ring 91 and the second stop ring 92.
In a preferred embodiment of the present invention, a third check ring 93 is provided in the second cylinder 20, and the first spring 70 is provided between the third check ring 93 and the spool 60.
In a preferred embodiment of the present invention, the first cylinder 10 and the second cylinder 20 are provided at the lower end of the first bracket 101, and the first cylinder 10 is screw-coupled with the second cylinder 20.
In a preferred embodiment of the present invention, the first frame 101 includes an inclined beam 1011 and a cross beam 1012, the position where the inclined beam 1011 is connected to the cross beam 1012 forms the first cylinder 10, and the position where the cross beam 1012 is connected to the inclined beam 1011 forms the second cylinder 20.
In a preferred embodiment of the present invention, the second frame 102 includes a supporting rod 1022, the rod-shaped body 1021 is disposed on the supporting rod 1022, and the supporting rod 1022 is used for supporting on the ground.
The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.
Claims (8)
1. The utility model provides an unmanned aerial vehicle, includes the main part, set up in the screw on main part upper portion, set up in the mounting system of main part bottom, its characterized in that, the mounting system includes:
a first bracket formed with a cylinder;
a second bracket formed with a rod-shaped body that extends into the cylinder block;
a first spring provided in the cylinder; wherein:
the operation of the rod-shaped body in the cylinder and the deformed state of the first spring are arranged such that:
when the rod-shaped body extends into the cylinder body to a greater depth or the rod-shaped body extends into the cylinder body to a lesser depth, the first spring is compressed and restored for multiple times;
the cylinder body comprises a first cylinder body and a second cylinder body, and the second cylinder body is perpendicular to the first cylinder body and is communicated with the first cylinder body;
the rod-shaped body extends into the first cylinder body, a section of the rod-shaped body, which is used for extending into the first cylinder body, forms a screw rod section, a nut is arranged in the first cylinder body, and the screw rod penetrates through the nut and forms spiral transmission with the nut;
an eccentric wheel is sleeved on the nut;
a second spring is arranged in the first cylinder body and used for pushing the rod-shaped body downwards;
the second cylinder body is internally provided with a valve core and a contact part arranged on the valve core, and the first spring is used for pushing the valve core towards the direction of the eccentric wheel so as to enable the contact part to be in contact with the wheel surface of the eccentric wheel;
the elastic coefficient of the first spring is greater than that of the second spring.
2. An unmanned aerial vehicle according to claim 1, wherein thrust bearings are provided at upper and lower ends of the eccentric wheel.
3. The drone of claim 1, wherein a ratio of the spring constant of the first spring to the spring constant of the second spring is greater than 4.
4. The unmanned aerial vehicle of claim 1, wherein a first baffle ring is disposed on the screw section, a second baffle ring is disposed inside the first cylinder, and the second spring is disposed between the first baffle ring and the second baffle ring.
5. The drone of claim 1, wherein a third stop ring is disposed within the second cylinder, the first spring disposed between the third stop ring and the spool.
6. The unmanned aerial vehicle of claim 1, wherein the first cylinder and the second cylinder are disposed at a lower end of the first bracket, the first cylinder being in threaded connection with the second cylinder.
7. The unmanned aerial vehicle of claim 1, wherein the first support comprises a diagonal beam and a cross beam, the diagonal beam being connected to form a first cylinder at a location of the cross beam, and the cross beam being connected to form a second cylinder at a location of the diagonal beam.
8. The unmanned aerial vehicle of claim 1, wherein the second support comprises a support rod, the rod-shaped body is disposed on the support rod, and the support rod is used for supporting on the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710954342.0A CN107757890B (en) | 2017-10-13 | 2017-10-13 | Unmanned plane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710954342.0A CN107757890B (en) | 2017-10-13 | 2017-10-13 | Unmanned plane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107757890A CN107757890A (en) | 2018-03-06 |
| CN107757890B true CN107757890B (en) | 2020-12-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710954342.0A Active CN107757890B (en) | 2017-10-13 | 2017-10-13 | Unmanned plane |
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| CN (1) | CN107757890B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2432572Y (en) * | 2000-05-30 | 2001-05-30 | 高一鹏 | Spring energy-storage sampler |
| US9453437B2 (en) * | 2014-10-29 | 2016-09-27 | Electro-Mechanical Associates, Inc. | Collapsible pushrod valve actuation system for a reciprocating piston machine cylinder |
| CN206068140U (en) * | 2016-08-29 | 2017-04-05 | 桂阳县浩丰科技有限公司 | A kind of vicariouss unmanned plane damping undercarriage |
| CN206520744U (en) * | 2017-01-12 | 2017-09-26 | 河北顺琪通信科技有限公司 | A kind of unmanned plane of up and down balance system |
| CN107187588B (en) * | 2017-05-06 | 2019-08-09 | 重庆乐禾无人机有限公司 | A kind of Intelligent unattended machine with safety and shock-absorption function |
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2017
- 2017-10-13 CN CN201710954342.0A patent/CN107757890B/en active Active
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| CN107757890A (en) | 2018-03-06 |
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Effective date of registration: 20201123 Address after: 225400 Jiangsu city of Taizhou province Taixing City Grain Mill Road Economic Development Zone No. 28 Applicant after: JIANGSU JINCHENG AVIATION TECHNOLOGY Co.,Ltd. Address before: 225600, Yangzhou, Jiangsu province Gaoyou City Ling Tong industrial concentration area Applicant before: JIANGSU HONGQI AVIATION TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20230425 Address after: 311600 Building 108, No.1 Wenhua Road, Hangkong Town, Shouchang Town, Jiande City, Hangzhou City, Zhejiang Province Patentee after: Zhejiang Xianglong Aviation Technology Co.,Ltd. Address before: 225400 No. 28 Nianfang Road, Taixing Economic Development Zone, Taizhou City, Jiangsu Province Patentee before: JIANGSU JINCHENG AVIATION TECHNOLOGY Co.,Ltd. |