CN116280176A - Helicopter pedal electromagnetic shielding and dustproof structure - Google Patents
Helicopter pedal electromagnetic shielding and dustproof structure Download PDFInfo
- Publication number
- CN116280176A CN116280176A CN202310479601.4A CN202310479601A CN116280176A CN 116280176 A CN116280176 A CN 116280176A CN 202310479601 A CN202310479601 A CN 202310479601A CN 116280176 A CN116280176 A CN 116280176A
- Authority
- CN
- China
- Prior art keywords
- dust cover
- cover body
- pedal
- pedal support
- support arm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000428 dust Substances 0.000 claims abstract description 63
- 238000003825 pressing Methods 0.000 claims abstract description 15
- 239000004744 fabric Substances 0.000 claims abstract description 14
- 239000002131 composite material Substances 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 5
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 241000628997 Flos Species 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000002253 acid Substances 0.000 abstract description 3
- 230000032683 aging Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 150000003839 salts Chemical class 0.000 abstract description 3
- 239000007921 spray Substances 0.000 abstract description 3
- 230000003044 adaptive effect Effects 0.000 abstract description 2
- 230000001681 protective effect Effects 0.000 abstract description 2
- RZVHIXYEVGDQDX-UHFFFAOYSA-N 9,10-anthraquinone Chemical compound C1=CC=C2C(=O)C3=CC=CC=C3C(=O)C2=C1 RZVHIXYEVGDQDX-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 238000009958 sewing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009964 serging Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
- B64C13/02—Initiating means
- B64C13/04—Initiating means actuated personally
- B64C13/044—Initiating means actuated personally operated by feet, e.g. pedals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B17/00—Methods preventing fouling
- B08B17/02—Preventing deposition of fouling or of dust
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
- H05K9/009—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising electro-conductive fibres, e.g. metal fibres, carbon fibres, metallised textile fibres, electro-conductive mesh, woven, non-woven mat, fleece, cross-linked
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/40—Weight reduction
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Aviation & Aerospace Engineering (AREA)
- Textile Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Mechanical Control Devices (AREA)
Abstract
The invention discloses an electromagnetic shielding and dustproof structure of a helicopter pedal, belongs to the field of helicopter tail rotor and airplane wheel control, and aims to solve the problems that a traditional dustproof cover is easy to age and has temperature requirements on working environment. Comprises a dust cover pressing plate, a pedal support arm, a dust cover body and a main body frame; the dust cover body is sewn into a cone shape, two first strip holes are formed in the main body frame, a second strip hole is formed in the dust cover pressing plate, the fixing ring is sleeved on the upper portion of the pedal support arm, the dust cover body is sleeved on the pedal support arm, the closing end of the dust cover body is bound to the fixing ring through binding bands, and the dust cover pressing plate and the sliding plate are fixedly clamped at the edge of the flaring end of the dust cover body. The electromagnetic shielding effect is achieved by utilizing the material characteristics of the conductive cloth, and the dustproof effect is achieved by utilizing the structure of the protective cover body. The invention has simple structure, easy manufacture, difficult aging, wide adaptive temperature range, acid atmosphere resistance, salt spray corrosion resistance, damp heat resistance and mould resistance.
Description
Technical Field
The invention belongs to the field of helicopter tail rotor and wheel control, and particularly relates to an electromagnetic shielding and dustproof structure for a helicopter pedal.
Background
Foot pedals are one of the important components of a helicopter flight control system for enabling pilot operation of the helicopter yaw motion control. The pedals are arranged in two sets on the helicopter in parallel, are respectively arranged in front of seats of the front and the back drivers of the cabin, control is transmitted to a tail booster arranged on a machine body structure or a tail reducer casing through a flight control line system by utilizing the pedaling action of the drivers, and the tail booster moves to control the pulling force of the tail propeller, so that yaw movement control of the helicopter is realized, the helicopter turns right when the right pedal is pushed forward, and the helicopter turns left when the left pedal is pushed forward. Under the condition of connecting the hydraulic pressure, the brake function of the helicopter rotor wing can be realized through the pedal control mechanism.
The flight control line extends from the inside of the cockpit to the outside of the fuselage, so holes are formed in the floor at the foot rest of the helicopter, so that the control line passes through the fuselage. However, the hole cannot be provided with a gap for communicating with the external environment, so that dust sealing is required. The traditional dust cover is made of rubber, is easy to age, has temperature requirements on working environment, and is not suitable for higher or low-temperature working environment.
Disclosure of Invention
The invention aims to provide an electromagnetic shielding and dustproof structure of a helicopter pedal, which aims to solve the problems that the traditional dustproof cover is easy to age and has temperature requirements on working environment. The technical scheme adopted by the invention is as follows:
a helicopter pedal electromagnetic shielding and dustproof structure comprises a dustproof cover pressing plate, pedal support arms, a dustproof cover body and a main body frame;
the dust cover body is sewn into a cone shape by composite cloth, the composite cloth comprises black silk-like canvas arranged on the outer surfaces of two sides, and conductive cloth is arranged between the two layers of black silk-like canvas;
the main body frame comprises a sliding plate, a notch is arranged in the middle of the sliding plate, hinge lugs are respectively arranged at the left side and the right side of the lower end of the sliding plate, a separation strip is connected with the sliding plate and separates the notch into two first strip holes, a second strip hole which is suitable for the first strip holes is arranged on the dust cover pressing plate, and the circumference of the flaring end of the dust cover body is larger than that of the first strip holes;
the pedal support arms are sequentially provided with a first hinge hole, a second hinge hole and a third hinge hole from top to bottom, the two pedal support arms penetrate through the two first strip holes in a one-to-one correspondence mode, the hinge shafts penetrate through the second hinge holes of the two pedal support arms respectively and are connected with the two hinge lugs, the third hinge hole is provided with a pin shaft hinged with the course output rod, the first hinge hole is hinged with the pedal, and the pedal is hinged with the outer side end of the sliding plate through the pull rod;
the fixed ring cup joints in the upper portion of pedal support arm, and the periphery of fixed ring is equipped with the ring channel, and the flaring end of dust cover body sets up downwards to cup joint on the pedal support arm, first binding ribbon bind the dust cover body on the ring channel of fixed ring, and the binding ribbon is binded the binding end of dust cover body on the pedal support arm to the second, and the lower extreme of dust cover body passes the rectangular hole of second, dust cover clamp plate and slide are with the flaring end edge clamp of dust cover body fixed.
Further, the fixing ring and the pedal support arm are fixed through rivets.
Further, the fixing ring is a polytetrafluoroethylene fixing ring.
Further, the left and right sides of slide, separate strip and dust cover clamp plate are equipped with ascending hem respectively, and the outside hem of dust cover clamp plate is connected with the hem cooperation of slide, and the inboard hem of dust cover clamp plate is connected with the hem cooperation of separate strip.
Compared with the prior art, the invention has the beneficial effects that:
utilize conductive cloth self material characteristic to play electromagnetic shield's effect, the binding off end of protection casing body is wrapped up in on the pedal support arm, and the flaring end edge of protection casing body presss from both sides between first rectangular hole and the rectangular hole of second, utilizes protection casing body self structure to play dustproof effect. The invention has simple structure, easy manufacture, difficult aging, temperature range of-55 ℃ to 70 ℃, temperature impact resistance, acid atmosphere resistance, salt spray corrosion resistance, damp heat resistance and mould resistance.
Drawings
FIG. 1 is an isometric view of the present invention;
FIG. 2 is a left side view of the present invention;
FIG. 3 is an isometric view of a body frame;
FIG. 4 is an isometric view of a dust cap pressure plate;
FIG. 5 is a schematic illustration of the assembly of two pedal arms;
FIG. 6 is a partial cross-sectional view of the securing ring;
FIG. 7 is a schematic view of the assembly of the present invention with a foot pedal and adjustment mechanism;
FIG. 8 is a schematic view of the assembly of the present invention with another view of the foot pedal and adjustment mechanism.
In the figure: 1-main body frame, 11-slide, 12-separate strip, 13-articulated ear, 14-first rectangular hole, 2-dust cover clamp plate, 21-second rectangular hole, 3-dust cover body, 4-pedal support arm, 51-first binding ribbon, 52-second binding ribbon, 6-solid ring, 7-articulated axle, 8-pedal, 81-pull rod, 9-guiding mechanism.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention is described below by means of specific embodiments shown in the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the invention. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention.
The connection mentioned in the invention is divided into fixed connection and detachable connection, wherein the fixed connection is a conventional fixed connection mode such as folding connection, rivet connection, bonding connection, welding connection and the like, the detachable connection comprises a conventional detachable mode such as bolt connection, buckle connection, pin connection, hinge connection and the like, and when a specific connection mode is not limited, at least one connection mode can be found in the conventional connection mode by default to realize the function, and the person skilled in the art can select the function according to the needs. For example: the fixed connection is welded connection, and the detachable connection is bolted connection.
The present invention will be described in further detail below with reference to the accompanying drawings, the following examples being illustrative of the present invention and the present invention is not limited to the following examples.
Examples: as shown in fig. 1-8, an electromagnetic shielding and dust-proof structure of a helicopter pedal comprises a dust cover pressing plate 2, a pedal support arm 4, a dust cover body 3 and a main body frame 1;
the dust cover body 3 is sewn into a cone shape by composite cloth, the composite cloth comprises black silk-like canvas which is arranged on the outer surfaces of two sides, and conductive cloth is arranged between the two layers of black silk-like canvas;
the main body frame 1 comprises a sliding plate 11, four corners of the sliding plate 11 are respectively provided with oblong holes, four screws correspondingly penetrate through the oblong holes one by one and are connected with the floor of the helicopter cockpit, the front end of the sliding plate 11 is connected with the output end of the adjusting mechanism 9, the middle part of the sliding plate 11 is provided with a notch, the left side and the right side of the lower end of the sliding plate 11 are respectively provided with a hinge lug 13, a separation strip 12 is connected with the sliding plate 11 and separates the notch into two first strip holes 14, the dust cover pressing plate 2 is provided with a second strip hole 21 which is adaptive to the first strip holes 14, and the perimeter of the flaring end of the dust cover body 3 is larger than that of the first strip holes 14;
the pedal support arms 4 are sequentially provided with a first hinge hole, a second hinge hole and a third hinge hole from top to bottom, the two pedal support arms 4 penetrate through the two first strip holes 14 in a one-to-one correspondence manner, the hinge shafts 7 penetrate through the second hinge holes of the two pedal support arms 4 respectively and are connected with the two hinge lugs 13, the third hinge hole is provided with a pin shaft hinged with a course output rod, the first hinge hole is hinged with the pedal 8, and the pedal 8 is hinged with the outer side end of the slide plate 11 through a pull rod 81;
the fixed ring 6 cup joints in the upper portion of pedal support arm 4, and the periphery of fixed ring 6 is equipped with the ring channel, and the flaring end of dust cover body 3 sets up downwards to cup joint on pedal support arm 4, and first binding ribbon 51 binds dust cover body 3 on the ring channel of fixed ring 6, and second binding ribbon 52 binds the binding end of dust cover body 3 on pedal support arm 4, and the lower extreme of dust cover body 3 passes second rectangular hole 21, dust cover clamp plate 2 and slide 11 are with the flaring end edge clamp of dust cover body 3 fixed.
The fixing ring 6 and the pedal support arm 4 are fixed by rivets.
The fixing ring 6 is a polytetrafluoroethylene fixing ring 6.
The left and right sides of slide 11, parting bead 12 and dust cover clamp plate 2 are equipped with ascending hem respectively, and the outside hem of dust cover clamp plate 2 is connected with the hem cooperation of slide 11, and the inboard hem of dust cover clamp plate 2 is connected with the hem cooperation of parting bead 12.
The conductive cloth is of the following type: YG-SC-AGSP-50;
the model of the black silk-like silk is: FZ66204-1995-520;
the rivet has the following model: CR7773S-04-02;
the first binding band 51 and the second binding band 52 are of the type: ASNE0043-1AP;
the manufacturing and mounting steps of the protective cover body 3 comprise:
a) And (3) drawing: drawing lines on the conductive cloth and the brocade silk canvas according to the shape of the mould
b) Sewing: cutting according to thread, sewing and serging
c) And (2) mounting: the edge of the flaring end of the dust cover body 3 is pressed around the first strip hole 14 of the sliding plate 11 by using the dust cover pressing plate 2, the dust cover pressing plate 2 and the sliding plate 11 are fastened by using bolts, the fixed ring 6 is riveted on the pedal support arm 4, the dust cover body 3 and the fixed ring 6 are bound by using the first binding ribbon 51 and the second binding ribbon 52, the dust cover body 3 and the fixed ring 6 are bound in an annular groove of the fixed ring 6, the dust cover is bound at the upper end of the fixed ring 6 and the lower end of the first hinge hole, the dust cover is prevented from slipping, redundant parts are sheared off after the first binding ribbon 51 and the second binding ribbon 52 are tensioned, and the two binding ribbons are sealed by using an electric soldering iron and prevented from sliding.
Utilize conductive cloth self material characteristic to play electromagnetic shield's effect, the binding off end of protection casing body 3 is wrapped up in on pedal support arm 4, and the flaring end edge of protection casing body 3 presss from both sides between first rectangular hole 14 and the rectangular hole 21 of second, utilizes protection casing body self structure to play dustproof effect. The invention has simple structure, easy manufacture, difficult aging, temperature range of-55 ℃ to 70 ℃, temperature impact resistance, acid atmosphere resistance, salt spray corrosion resistance, damp heat resistance and mould resistance.
The above embodiments are only illustrative of the present invention and do not limit the scope thereof, and those skilled in the art may also make modifications to parts thereof without departing from the spirit of the invention.
Claims (4)
1. A helicopter pedal electromagnetic shielding and dustproof structure is characterized in that: comprises a dust cover pressing plate (2), a pedal support arm (4), a dust cover body (3) and a main body frame (1);
the dust cover body (3) is sewn into a cone shape by composite cloth, the composite cloth comprises black silk floss silk on the outer surfaces of two sides, and conductive cloth is arranged between the two layers of black silk floss silk;
the main body frame (1) comprises a sliding plate (11), a notch is formed in the middle of the sliding plate (11), hinge lugs (13) are respectively arranged at the left side and the right side of the lower end of the sliding plate (11), a separation strip (12) is connected with the sliding plate (11) and separates the notch into two first strip holes (14), a second strip hole (21) which is matched with the first strip holes (14) is formed in the dust cover pressing plate (2), and the perimeter of the flaring end of the dust cover body (3) is larger than that of the first strip holes (14);
the pedal support arms (4) are sequentially provided with a first hinge hole, a second hinge hole and a third hinge hole from top to bottom, the two pedal support arms (4) correspondingly penetrate through the two first strip holes (14) one by one, the hinge shafts (7) penetrate through the second hinge holes of the two pedal support arms (4) respectively and are connected with the two hinge lugs (13), the third hinge hole is provided with a pin shaft hinged with a course output rod, the first hinge hole is hinged with the pedal (8), and the pedal (8) is hinged with the outer side end of the sliding plate (11) through the pull rod (81);
the fixed ring (6) is sleeved on the upper portion of the pedal support arm (4), an annular groove is formed in the periphery of the fixed ring (6), the flaring end of the dust cover body (3) is downwards arranged and sleeved on the pedal support arm (4), the first binding band (51) binds the dust cover body (3) on the annular groove of the fixed ring (6), the second binding band (52) binds the closing end of the dust cover body (3) on the pedal support arm (4), the lower end of the dust cover body (3) penetrates through the second strip hole (21), and the dust cover pressing plate (2) and the sliding plate (11) clamp and fix the flaring end edge of the dust cover body (3).
2. The helicopter pedal electromagnetic shielding and dust preventing structure of claim 1, wherein: the fixing ring (6) and the pedal support arm (4) are fixed by rivets.
3. The helicopter pedal electromagnetic shielding and dust preventing structure of claim 1, wherein: the fixing ring (6) is a polytetrafluoroethylene fixing ring (6).
4. A helicopter pedal electromagnetic shielding and dust preventing structure according to any one of claims 1-3, wherein: the left side and the right side of the sliding plate (11), the separation strip (12) and the dust cover pressing plate (2) are respectively provided with an upward folded edge, the outer folded edge of the dust cover pressing plate (2) is connected with the folded edge of the sliding plate (11) in a matched mode, and the inner folded edge of the dust cover pressing plate (2) is connected with the folded edge of the separation strip (12) in a matched mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310479601.4A CN116280176A (en) | 2023-04-28 | 2023-04-28 | Helicopter pedal electromagnetic shielding and dustproof structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310479601.4A CN116280176A (en) | 2023-04-28 | 2023-04-28 | Helicopter pedal electromagnetic shielding and dustproof structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116280176A true CN116280176A (en) | 2023-06-23 |
Family
ID=86826027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310479601.4A Pending CN116280176A (en) | 2023-04-28 | 2023-04-28 | Helicopter pedal electromagnetic shielding and dustproof structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116280176A (en) |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000021506A (en) * | 1998-07-06 | 2000-01-21 | Toyoda Gosei Co Ltd | Terminal shielding structure |
| US6289760B1 (en) * | 1999-01-18 | 2001-09-18 | Hyundai Motor Company | Mounting structure of change lever in vehicle |
| CA2732671A1 (en) * | 2008-08-04 | 2010-02-11 | Bell Helicopter Textron, Inc. | Force gradient using a non-contact proximity sensor |
| CN202691061U (en) * | 2012-07-20 | 2013-01-23 | 陕西重型汽车有限公司 | Dustproof hood of truck shift seat |
| CN204526827U (en) * | 2015-04-13 | 2015-08-05 | 安徽江淮汽车股份有限公司 | A kind of gearshift guard shield assembly of automobile |
| CN105711844A (en) * | 2014-12-03 | 2016-06-29 | 中国直升机设计研究所 | Cyclic variable-pitch screw rod dustproof device for helicopter |
| CN105711818A (en) * | 2014-12-03 | 2016-06-29 | 中国直升机设计研究所 | Helicopter pedal operating mechanism |
| CN205534180U (en) * | 2016-04-28 | 2016-08-31 | 唐山弘基传动科技有限公司 | Derailleur gear level anti -disengagement mechanism of preventing dust |
| CN106741870A (en) * | 2016-11-30 | 2017-05-31 | 中国直升机设计研究所 | A kind of cockpit steerable system and method |
| CN206405149U (en) * | 2016-12-30 | 2017-08-15 | 广西玉柴机器股份有限公司 | A kind of bell housing cleans screening arrangement |
| CN208802143U (en) * | 2018-08-31 | 2019-04-30 | 哈尔滨远驰航空装备有限公司 | A kind of ventilation device of ventilator hole cover |
| CN209000277U (en) * | 2018-05-29 | 2019-06-18 | 福建科德电子科技有限公司 | A kind of simulation C919 aircraft operation lever apparatus |
| CN110182357A (en) * | 2019-06-25 | 2019-08-30 | 西安航空制动科技有限公司 | A kind of dirt-proof boot and its design method for flight control system |
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-
2023
- 2023-04-28 CN CN202310479601.4A patent/CN116280176A/en active Pending
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|---|---|---|---|---|
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| US6289760B1 (en) * | 1999-01-18 | 2001-09-18 | Hyundai Motor Company | Mounting structure of change lever in vehicle |
| CA2732671A1 (en) * | 2008-08-04 | 2010-02-11 | Bell Helicopter Textron, Inc. | Force gradient using a non-contact proximity sensor |
| CN202691061U (en) * | 2012-07-20 | 2013-01-23 | 陕西重型汽车有限公司 | Dustproof hood of truck shift seat |
| CN105711818A (en) * | 2014-12-03 | 2016-06-29 | 中国直升机设计研究所 | Helicopter pedal operating mechanism |
| CN105711844A (en) * | 2014-12-03 | 2016-06-29 | 中国直升机设计研究所 | Cyclic variable-pitch screw rod dustproof device for helicopter |
| CN204526827U (en) * | 2015-04-13 | 2015-08-05 | 安徽江淮汽车股份有限公司 | A kind of gearshift guard shield assembly of automobile |
| CN205534180U (en) * | 2016-04-28 | 2016-08-31 | 唐山弘基传动科技有限公司 | Derailleur gear level anti -disengagement mechanism of preventing dust |
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| CN206405149U (en) * | 2016-12-30 | 2017-08-15 | 广西玉柴机器股份有限公司 | A kind of bell housing cleans screening arrangement |
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| CN110182357A (en) * | 2019-06-25 | 2019-08-30 | 西安航空制动科技有限公司 | A kind of dirt-proof boot and its design method for flight control system |
| CN114056550A (en) * | 2021-11-03 | 2022-02-18 | 哈尔滨哈飞航空工业有限责任公司 | Dustproof device for airplane pedal |
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| Title |
|---|
| 吴群: "微波工程技术", 哈尔滨工业大学出版社, pages: 298 - 302 * |
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