CN107792346B - Motor lead screw nut assembly, steering engine and aircraft - Google Patents
Motor lead screw nut assembly, steering engine and aircraft Download PDFInfo
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- CN107792346B CN107792346B CN201710917179.0A CN201710917179A CN107792346B CN 107792346 B CN107792346 B CN 107792346B CN 201710917179 A CN201710917179 A CN 201710917179A CN 107792346 B CN107792346 B CN 107792346B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C13/00—Control systems or transmitting systems for actuating flying-control surfaces, lift-increasing flaps, air brakes, or spoilers
- B64C13/24—Transmitting means
- B64C13/38—Transmitting means with power amplification
- B64C13/50—Transmitting means with power amplification using electrical energy
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Abstract
The invention provides a motor lead screw nut assembly, a steering engine and an aircraft. The steering engine provided by the invention comprises a transmission mechanism, an unfolding locking mechanism and a support body; the transmission mechanism motor screw nut component, the pull pin, the rotating body, the rudder piece, the upper sliding bearing and the lower sliding bearing; the unfolding locking mechanism comprises a locking pin assembly, a middle sliding bearing, a rotating shaft, a short screw rod, a tension spring and a long screw rod; the supporting body is used for fixing the motor. The steering engine provided by the invention has the advantages of simple structure, high mechanical transmission efficiency, small transmission gap and reliable locking.
Description
Technical Field
The invention relates to the technical field of folding steering engines and electric steering engines for a cartridge launching small aircraft, in particular to a motor screw nut assembly, a steering engine and an aircraft.
Background
Along with the miniaturization of aircrafts, the miniaturization of steering engines is an inevitable trend of the development of aircrafts, and the aircrafts are widely concerned by domestic and foreign scholars. The driving modes of the steering engine include air pressure type, hydraulic type and electric type. Wherein pneumatic cylinder and pneumatic cylinder drive realize miniaturized difficulty owing to drive power device is great, so electric steering engine receives people's favor more and more. The ball screw type steering engine has the characteristics of large transmission ratio and small occupied space, meets the requirements of small volume and large transmission ratio, and is a commonly used transmission mechanism of an electric steering engine.
Chinese patent application CN105035310A discloses an electric steering engine, comprising: a motor, a reducer and a feedback potentiometer; the speed reducer includes: the bevel gear is meshed with an output shaft of the motor; the gear assembly is in meshed connection with the bevel gear; the straight gear is meshed with the gear assembly; the output shaft is connected with the straight gear; furthermore, a feedback potentiometer is connected to the output shaft. The bevel gear is used as a speed reducing mechanism, the transmission mechanism can realize the change from horizontal rotation to vertical rotation, but the bevel gear is complex to process, has high requirement on assembly precision, and can not be applied to small aircrafts due to large occupied space.
The steering engine with the folding rudder mechanism has very important significance for transportation and storage of aircrafts, adaptability of aircrafts, reduction of sizes of packing boxes and the like, so that the folding rudder aircrafts are concerned more and more widely. The unfolding performance of the folding rudder mechanism directly influences the flight performance of the aircraft, so the invention of the quick unfolding locking mechanism has very important significance.
Disclosure of Invention
The invention solves the problems that the existing steering engine is complex in structure, large in mass, poor in high and low temperature performance, large in impact force of a folding rudder, lack of a small-size steering engine with a folding rudder sheet and the like, and provides a motor screw nut assembly, a steering engine and an aircraft.
In a first aspect, the present invention provides a motor lead screw nut assembly comprising: the device comprises a motor, a coupler, a lower bearing, a lead screw nut, a nut seat, a bearing retainer ring, an upper bearing and a locking nut; the motor is connected with the lead screw through a coupler and transmits the power of the motor to the lead screw; the screw rod is connected with the screw rod nut, and the screw rod nut is fixedly connected with the nut seat; the coupler is in contact with the lower bearing to play a role in supporting the lower bearing, and the bearing retainer ring is connected to the lead screw through threads and can apply pre-tightening force to the bearing; the locking nut is connected to the lead screw through threads and locks and prevents looseness of the bearing retainer ring. According to the motor lead screw nut component, two ends of a lead screw are supported through the angular contact ball bearings, a bearing close to the end of a motor is used as a bearing retainer ring by a coupler, the bearing retainer ring is connected to the lead screw through threads and is in contact with the inner ring of the bearing, and a locking nut is connected to the lead screw through threads to play a role in locking the bearing retainer ring. The two bearings are installed back to back, the pretightening force of the bearings is adjusted through the bearing retainer rings, and the friction torque of the bearings can be slightly increased by the installation mode when the bearings deform at high and low temperatures.
In a second aspect, the present invention provides a steering engine, comprising: the transmission mechanism comprises a motor lead screw nut assembly, a pull pin, a rotating body, a rudder piece, an upper sliding bearing and a lower sliding bearing, wherein the pull pin is fixedly connected with a nut seat of the motor lead screw nut assembly; the rudder sheet is connected to the rotor through the rotating shaft and the middle sliding bearing, the rudder sheet can rotate around the rotating shaft, and the locking pin assembly is fixed on the rudder sheet; and the support body is used for fixing the motor. The transmission mechanism of the steering engine takes the motor as a power source, transmits power to the screw nut through the coupler, transmits the power to the rotor through the screw nut, and transmits the power to the rudder sheet through the matching of the rotor and the rudder sheet. The lead screw nut can realize the conversion from rotary motion to linear motion, and realize large transmission ratio, and the cooperation of thumb pin and fork spare can convert the linear motion of nut seat into the rotary motion of rotor. In the transmission process, the nut seat is matched with the guide mechanism on the supporting piece to realize linear motion. The unfolding locking device takes a tension spring as a power source, the tension spring is fixed on a screw rod connected to a rudder piece and a rotating body and provides unfolding power for the rudder piece, a rotating shaft and a middle sliding bearing are connected to the rudder piece and the rotating body, and a locking pin assembly is connected to the rudder piece through a screw. When the rudder blade is unfolded, the tension spring pulls the rudder blade to be unfolded through the screw rod, and after the rudder blade is unfolded in place, the locking pin is ejected out and enters the locking hole of the rotating body, so that locking is realized.
Optionally, in some embodiments, the steering engine further includes a potentiometer, and the potentiometer is connected to the other end of the rotating body.
Optionally, in some embodiments, the locking pin assembly comprises: locking pin separation blade, spring and locking pin. The locking device is fixed on the rudder piece, and the locking pin is popped up by taking the spring as power. In the unfolding process, the locking pin can be retracted through matching with the chute on the rotating body, and after the locking pin is unfolded in place, the locking pin enters the locking hole of the rotating body through the elasticity of the spring to realize locking.
Optionally, in some embodiments, the short screw is fixed to the rudder sheet through a thread, the long screw is fixed to the rotor through a thread, and two ends of the tension spring are fixed to the long screw and the short screw respectively to provide power for unfolding the rudder sheet.
Optionally, in some embodiments, a guide groove and a locking hole are formed in the rotor, when the rudder sheet is unfolded, the locking pin is in contact with the guide groove of the rotor to achieve compression, and the rudder sheet is ejected out of the locking hole of the rotor to achieve locking after being unfolded in place.
Optionally, in some embodiments, a shifting fork is further disposed on the rotator, and the shifting fork cooperates with the pulling pin to drive the rotator to move, preferably, translation of the pulling pin drives rotation of the rotator, and cooperation of the pulling pin and the shifting fork can convert linear motion of the nut seat into rotational motion of the rotator.
In a third aspect, the invention further provides an aircraft, and the steering engines provided by the invention are symmetrically fixed at two ends of the aircraft.
The steering engine provided by the invention has the advantages of simple structure, high mechanical transmission efficiency, small transmission gap and reliable locking.
Drawings
FIG. 1 is an expanded front cross-sectional view of a steering engine according to one embodiment of the present invention;
FIG. 2 is an expanded side cross-sectional view of a steering engine according to one embodiment of the present invention;
FIG. 3 is a cross-sectional view of a motor screw nut assembly of a steering engine according to an embodiment of the present invention;
figure 4 is a cross-sectional view of a locking pin assembly of a steering engine according to one embodiment of the present invention.
The labels in the figure are:
1. rudder sheet, 2, locking pin assembly, 3, support body, 4, upper sliding bearing, 5, rotating body, 501, guide groove, 502, locking hole, 503, shifting fork assembly, 6, middle sliding bearing, 7, rotating shaft, 8, lower sliding bearing, 9, potentiometer press plate, 10, potentiometer, 11, motor screw nut assembly, 12, shifting pin, 13, short screw, 14, tension spring, 15, long screw, 21, locking pin baffle, 22, spring, 23, locking pin, 1101, motor, 1102, shaft coupling, 1103, bearing, 1104, screw, 1105, screw nut, 1106, nut seat, 1107, bearing retainer, 1108 and locking nut.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As shown in fig. 3, which is a cross-sectional view of a motor screw nut assembly of a steering engine according to an embodiment of the present invention, in a specific embodiment, the motor screw nut assembly 11 includes: the motor 1101, a coupler 1102, a lower bearing 1132, a lead screw 1104, a lead screw nut 1105, a nut seat 1106, a bearing retainer ring 1107, an upper bearing 1131 and a lock nut 1108; the motor 1101 is connected with the lead screw 1104 through a coupler 1102, and the power of the motor 1101 is transmitted to the lead screw 1104; the lead screw 1104 is connected with the lead screw nut 1105, and the lead screw nut 1105 is fixedly connected with the nut seat 1106; the end face of the coupler 1102 is in contact with the lower bearing 1132 to play a role in supporting the bearing, and the bearing retainer ring 1107 is connected to the lead screw 1104 through threads to apply pre-pressure to the lower bearing 1132; the locking nut 1108 is connected to the lead screw 1104 through threads to lock and prevent looseness of the bearing retainer ring. According to the motor lead screw nut component 11, two ends of a lead screw are supported through angular contact ball bearings, the coupler 1102 is in contact with the lower bearing 1132 to support the lower bearing 1132, the bearing retainer ring 1107 is connected to the lead screw 1104 through threads to support the upper bearing 1131 and apply pretightening force to contact with the inner ring of the bearing, and the locking nut is connected to the lead screw through threads to lock the bearing retainer ring. The two bearings are installed back to back, the pretightening force of the bearings is adjusted through the bearing retainer rings, and the friction torque of the bearings can be slightly increased by the installation mode when the bearings deform at high and low temperatures.
As shown in fig. 1-2, which are a front unfolded sectional view and a side unfolded sectional view of a steering engine according to an embodiment of the present invention, the steering engine provided by the present invention includes a steering engine transmission mechanism, an unfolding locking mechanism, and a support.
Specifically, the transmission mechanism comprises a motor lead screw nut assembly 11, a pull pin 12, a rotating body 5, a rudder blade 1, an upper sliding bearing 4 and a lower sliding bearing 8, the pull pin 12 is fixedly connected with a nut seat 1106 of the motor lead screw nut assembly 11, the rotating body 5 is provided with a guide groove 501, and the rudder blade 1 is installed in the guide groove 501. It is further preferred that the rotor guide channel 501 and the locking pin 203 cooperate to ensure a uniform transition without jamming, ensuring that the surfaces of the guide channel 501 and the locking pin 203 are smooth. Specifically, the support body 3 is used to fix the motor 1101. It is further preferred that the rudder blade 1 and the rotor 5 are fitted to ensure a small clearance and at the same time a low friction during the relative movement between the two.
Specifically, expand locking mechanism and include locking pin subassembly, well slide bearing 6, pivot 7, short screw 13, extension spring 14 and long screw 15, rudder piece 1 passes through pivot 7 and well slide bearing 6 are connected on the rotor 5, rudder piece 1 can wind pivot 7 rotates, the locking pin subassembly is fixed on rudder piece 1. Preferably, the tension spring 14 satisfies a large deformation condition, and the maximum deformation amount reaches twice the length of the tension spring, so that the spring is better ensured not to be out of order and not to be plastically deformed under the large deformation condition.
The transmission mechanism of the steering engine takes a motor 1101 as a power source, transmits power to a lead screw nut 1105 through a coupler, transmits the power to a rotor 5 through the lead screw nut 1105, and transmits the power to a rudder piece 1 through the matching of the rotor 5 and the rudder piece 1. The lead screw nut 1105 can realize the conversion from the rotation motion to the linear motion, and realize the large transmission ratio, and the poking pin 12 and the poking fork piece are matched to convert the linear motion of the nut seat into the rotation motion of the rotating body 5. In the transmission process, the nut seat is matched with the guide mechanism on the supporting piece to realize linear motion. The unfolding locking device takes a tension spring 14 as a power source, the tension spring 14 is fixed on a screw rod connected to the rudder blade 1 and the rotor 5 to provide unfolding power for the rudder blade 1, a rotating shaft 7 and a middle sliding bearing are connected to the rudder blade 1 and the rotor 5, and a locking pin assembly is connected to the rudder blade 1 through a screw. When the tension spring is stretched in a folded state, the tension spring 14 pulls the rudder sheet 1 to be unfolded through the screw rod, and after the rudder sheet is unfolded in place, the locking pin is ejected out and enters the locking hole of the rotating body 5 to realize locking. The fit clearance between the nut seat 1106 and the support body 3 is proper, which ensures both smooth sliding of the nut seat 1106 on the support body 3 and a small clearance therebetween.
In a specific embodiment, preferably, the steering engine provided by the invention further comprises a potentiometer, and the potentiometer 10 is connected with the other end of the rotating body 5.
In a specific embodiment, preferably, the short screw is fixed on the rudder blade 1 through a thread, the long screw is fixed on the rotor 5 through a thread, and two ends of the tension spring 14 are respectively fixed on the long screw and the short screw to provide power for unfolding the rudder blade 1.
Fig. 4 is a cross-sectional view of a locking pin assembly of a steering engine according to an embodiment of the present invention. In a particular embodiment, the locking pin assembly comprises: a locking pin catch 201, a spring 202 and a locking pin 203. The locking device is fixed on the rudder sheet 1, and the locking pin 203 is ejected by taking the spring 202 as power. In the unfolding process, the locking pin 203 can be retracted through the matching with the inclined groove on the rotating body 5, and after the locking pin is unfolded in place, the locking pin 203 enters the locking hole 502 of the rotating body 5 through the elasticity of the spring 202 to realize locking. Preferably, a guide groove 501 and a locking hole 502 are formed in the rotor 5, when the rudder sheet 1 is unfolded, the locking pin 203 is in contact with the guide groove of the rotor 5 to achieve compression, and the rudder sheet 1 is ejected out of the locking hole 502 of the rotor 5 to achieve locking after being unfolded in place.
The invention further provides an aircraft, and the steering engines provided by the invention are symmetrically fixed at two ends of the aircraft.
In a specific embodiment, the steering engine with the folding rudder piece is a steering engine mechanism for a barrel type launching aircraft, the folding rudder can be safely and reliably unfolded and locked under launching disturbance and pneumatic interference when being launched out of a barrel, the locking is reliable after the folding rudder is longitudinally unfolded, and a steering engine transmission mechanism can overcome pneumatic torque and normally work under flight vibration interference. Further preferably, the motor 1101 is fixed on the support body 3, and is connected with the lead screw 1104 through the coupling 1102, so that the power of the motor 1101 is transmitted to the lead screw 1104, the lead screw 1104 is fixedly connected with the lead screw nut 1105 and the nut seat 1106, the nut seat 1106 is mutually matched with the support body 3, the surface slides, the shift pin 12 is fixedly connected with the nut seat 1106, the shift pin 12 is matched with a shift fork on the rotating body 5, the translation of the shift pin 12 drives the rotating body 5 to rotate, and the two ends of the rotating body 5 are connected with the rudder piece 1 and the potentiometer 10, so that synchronous rotation is realized.
The invention has the beneficial effects that:
the transmission mechanism of the steering engine takes a motor as a power source, transmits power to a screw nut through a coupler, transmits the power to a rotor through the screw nut, and transmits the power to a rudder blade through the matching of the rotor and the rudder blade. The lead screw nut realizes the conversion from rotary motion to linear motion and realizes a large transmission ratio, and the shifting pin is matched with the shifting fork piece to convert the linear motion of the nut seat into the rotary motion of the rotator. In the transmission process, the nut seat is matched with the guide mechanism on the supporting piece to realize linear motion.
Two ends of the screw rod are supported through angular contact ball bearings, a bearing close to the end of the motor is used as a bearing retainer ring, the bearing retainer ring is connected to the screw rod through threads and is in contact with an inner ring of the bearing, and a locking nut is connected to the screw rod through threads and plays a role in locking the bearing retainer ring. The upper bearing and the lower bearing are installed back to back, the pretightening force of the bearing is adjusted through the bearing retainer ring, and the friction torque of the bearing can be slightly increased by the installation mode when high-temperature and low-temperature deformation occurs.
The unfolding locking device takes a tension spring as a power source, the tension spring is fixed on a screw rod connected to the rudder piece and the rotating body and provides unfolding power for the rudder piece, the rotating shaft and the middle sliding bearing are connected to the rudder piece and the rotating body, and the locking pin assembly is connected to the rudder piece through a screw. When the tension spring is stretched in a folded state, the tension spring pulls the rudder sheet to be unfolded through the screw rod during unfolding, and after the rudder sheet is unfolded in place, the locking pin is ejected out and enters a locking hole (shown as 502) of the rotating body to realize locking.
And fourthly, the locking device is fixed on the plurality of sheets, and the locking pin is ejected out by taking a spring as power. In the unfolding process, the locking pin can retract through the matching of the locking pin and the guide groove on the rotating body (as shown in 501), and the locking pin enters the locking hole of the rotating body through the elasticity of the spring after the locking pin is unfolded in place to realize locking.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
While the laser self-mixing detection monitoring device provided by the present invention has been described in detail, those skilled in the art will appreciate that the embodiments and applications of the invention are not limited thereto.
Claims (4)
1. A steering engine, comprising:
the transmission mechanism comprises a motor lead screw nut component, a pull pin, a rotor, a rudder sheet, an upper sliding bearing and a lower sliding bearing,
the motor lead screw nut subassembly includes: the device comprises a motor, a coupler, a lower bearing, a lead screw nut, a nut seat, a bearing retainer ring, an upper bearing and a locking nut; the motor is connected with the lead screw through a coupler and transmits the power of the motor to the lead screw; the screw rod is connected with the screw rod nut, and the screw rod nut is fixedly connected with the nut seat; the coupler is in contact with the lower bearing to play a role in supporting the lower bearing; the bearing retainer ring is connected to the lead screw through threads and applies pretightening force to the bearing; the locking nut is connected to the lead screw through threads and locks and prevents the bearing retainer ring from loosening;
the transmission mechanism takes the motor as a power source, transmits power to the lead screw nut through a coupler, the lead screw nut transmits the power to the rotating body, the pull pin is fixedly connected with a nut seat of the motor lead screw nut assembly, and the rotating body is also provided with a shifting fork piece which is matched with the pull pin so as to drive the rotating body to move; the rotating body is provided with a guide groove, and the rudder piece is arranged in the guide groove; the upper sliding bearing is arranged at the upper end of the rotating body, and the lower sliding bearing is arranged at the lower end of the rotating body;
the unfolding locking mechanism comprises a locking pin assembly, a middle sliding bearing, a rotating shaft, a short screw, a tension spring and a long screw, wherein the short screw is fixed on the rudder piece through threads, the long screw is fixed on the rotating body through threads, and two ends of the tension spring are respectively fixed on the long screw and the short screw; the unfolding locking mechanism takes the tension spring as a power source, the rudder sheet is connected to the rotor through the rotating shaft and the middle sliding bearing, the rudder sheet can rotate around the rotating shaft, and the locking pin assembly is fixed on the rudder sheet; the locking pin assembly includes: the locking pin retaining piece, the spring and the locking pin, and the rotating body is provided with a guide groove and a locking hole; when the rudder sheet is unfolded, the locking pin is in contact with the guide groove of the rotating body to realize compression; the rudder sheet is popped out to a locking hole of the rotor to realize locking after being unfolded in place; and
the supporting body is used for fixing the motor.
2. The steering engine of claim 1, wherein the upper bearing and the lower bearing are mounted back to back, and the pre-tightening force of the upper bearing and the lower bearing is adjusted by a bearing retainer ring; and two ends of the lead screw are supported by angular contact bearings.
3. The steering engine of claim 1, further comprising a potentiometer, wherein the potentiometer is connected to the other end of the rotor.
4. An aircraft, characterized in that the steering engine of any one of claims 1-3 is symmetrically fixed on both ends of the aircraft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710917179.0A CN107792346B (en) | 2017-09-30 | 2017-09-30 | Motor lead screw nut assembly, steering engine and aircraft |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710917179.0A CN107792346B (en) | 2017-09-30 | 2017-09-30 | Motor lead screw nut assembly, steering engine and aircraft |
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| Publication Number | Publication Date |
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| CN107792346A CN107792346A (en) | 2018-03-13 |
| CN107792346B true CN107792346B (en) | 2020-04-10 |
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| CN201710917179.0A Active CN107792346B (en) | 2017-09-30 | 2017-09-30 | Motor lead screw nut assembly, steering engine and aircraft |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109760858B (en) | 2018-12-18 | 2022-08-05 | 上海航天控制技术研究所 | Two-degree-of-freedom decoupling space adhering claw transmission device |
| CN110260777A (en) * | 2019-07-05 | 2019-09-20 | 贵州航天控制技术有限公司 | A kind of embedded rudder face corner measuring apparatus |
| CN110953313B (en) * | 2019-11-15 | 2021-11-02 | 北京机械设备研究所 | Actuating mechanism of heavy-load anti-locking electric steering engine |
| CN114562918A (en) * | 2022-03-25 | 2022-05-31 | 西安雷神防务技术有限公司 | Miniature electric folding steering engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8281678B2 (en) * | 2008-12-30 | 2012-10-09 | Eaton Corporation | Ballscrew assembly with detection feature |
| CN202283680U (en) * | 2011-08-10 | 2012-06-27 | 宁波顺兴机械制造有限公司 | Lower mold plate transfer-molded device of closing device |
| CN102774494A (en) * | 2012-07-06 | 2012-11-14 | 北京林业大学 | Aircraft folding rudder capable of stretching automatically |
| CN103192975A (en) * | 2013-03-19 | 2013-07-10 | 肖明建 | Crosshead helm shifting machine |
| CN203906696U (en) * | 2014-04-23 | 2014-10-29 | 兰溪市海德机床制造有限公司 | Screw rod assembly and prestretching structure thereof |
| CN106151431A (en) * | 2015-04-09 | 2016-11-23 | 哈尔滨建成集团有限公司 | A kind of electric steering engine ball-screw transmission mechanism loading flexible damping |
| CN106347632B (en) * | 2016-10-26 | 2018-10-26 | 中国科学院长春光学精密机械与物理研究所 | A kind of expansion retaining mechanism |
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Effective date of registration: 20210219 Address after: No.17, Hongxiang 2nd Road, Jihongtan street, Chengyang District, Qingdao City, Shandong Province 266109 Patentee after: Zhongtian Changguang (Qingdao) equipment Technology Co.,Ltd. Address before: 130033 No. 3888 southeast Lake Road, Changchun economic and Technological Development Zone, Jilin Patentee before: Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences |
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