CN213869437U - One-way damping type air spring for airplane cabin door - Google Patents
One-way damping type air spring for airplane cabin door Download PDFInfo
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- CN213869437U CN213869437U CN202020716161.1U CN202020716161U CN213869437U CN 213869437 U CN213869437 U CN 213869437U CN 202020716161 U CN202020716161 U CN 202020716161U CN 213869437 U CN213869437 U CN 213869437U
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- piston rod
- outer cylinder
- guide sleeve
- single lug
- cavity
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- 238000013016 damping Methods 0.000 title claims abstract description 47
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 20
- 238000007667 floating Methods 0.000 claims abstract description 20
- 239000010959 steel Substances 0.000 claims abstract description 20
- 239000007789 gas Substances 0.000 claims description 36
- 239000003921 oil Substances 0.000 claims description 36
- 238000007789 sealing Methods 0.000 claims description 21
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 239000010720 hydraulic oil Substances 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 238000002788 crimping Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 5
- 230000003139 buffering effect Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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Abstract
The utility model provides an one-way damping type air spring for aircraft hatch door, include: the device comprises an outer cylinder (1), a single lug I (2), a floating piston (3), a piston rod (5), an embedded cylinder (6), a steel ball (7), a return spring (8), a single lug II (15) and a joint bearing (16); one end of the single lug I (2) is fixedly connected with one end of the outer cylinder (1), and the other end of the single lug I (2) is connected with the fixed end of the cabin door through a joint bearing (16); one end of the single lug II (15) is connected with one end of the piston rod (5) far away from the piston, and the other end of the single lug II (15) is connected with the movable end of the cabin door through a joint bearing (16); the other end of the piston rod (5) is provided with an annular bulge which penetrates through the outer cylinder (1) to separate the outer cylinder (1) into a rod cavity (51) and a rodless cavity (61); the structure is simple and reliable, stable one-way damping force is output in the stretching direction, and no damping force exists in the retracting direction.
Description
Technical Field
The utility model belongs to aircraft hatch door structure field, concretely relates to one-way damping type air spring for aircraft hatch door.
Background
The gas spring is also called a support rod, an angle adjuster, a gas pressure rod or a damper, is an elastic element which takes gas or liquid as a working medium, and becomes a standard accessory in the fields of aerospace, automobile, mechanical manufacturing and the like because of convenient installation, stable work, safe use and no need of maintenance. Because the air spring has the functions of supporting, buffering, height adjusting, angle adjusting and the like, the air spring is widely suitable for airplane doors with various adjustable angles and heights.
The common gas spring comprises a stainless steel outer cylinder, a piston rod, a sealing assembly and the like, the damping force of the existing damping type gas spring is mainly realized in a mode of throttling through a damping hole, the output damping force of the gas spring is the same when the piston rod extends out or retracts, and the rebound phenomenon is easily generated when the piston rod retracts in one-way damping.
However, in the process of requiring the cabin door to be opened downwards, the air spring is required to output large damping force, the damping force is not required to be output during lifting, the retraction is stable, and the existing air spring cannot meet the use requirement.
SUMMERY OF THE UTILITY MODEL
The utility model aims at: the utility model provides a one-way damping type air spring for aircraft hatch door, solves common air spring and has that the air spring output damping force size is the same when the piston rod stretches out or retracts, produces the problem of resilience phenomenon easily during the indentation during one-way damping.
The utility model provides an one-way damping type air spring for aircraft hatch door, include: the device comprises an outer cylinder 1, a single lug I2, a floating piston 3, a piston rod 5, an embedded cylinder 6, a steel ball 7, a return spring 8, a single lug II 15 and a joint bearing 16;
one end of the single lug I2 is fixedly connected with one end of the outer barrel 1, and the other end of the single lug I2 is connected with the fixed end of the cabin door through a joint bearing 16;
one end of the single lug II 15 is fixedly connected with one end, far away from the piston, of the piston rod 5 through threads, and the other end of the single lug II 15 is connected with the movable end of the cabin door through a joint bearing 16;
the other end of the piston rod 5 is provided with an annular bulge which penetrates through the outer barrel 1 to separate the outer barrel 1 into a rod cavity 51 and a rodless cavity 61;
the annular bulge is provided with at least one damping hole 53 which is uniformly distributed, the other end of the piston rod 5 is provided with an oil passing hole 52, and both the oil passing hole 52 and the damping hole 53 can be communicated with the rod cavity 51 and the rodless cavity 61;
the embedded cylinder 6 is arranged in the oil passing hole 52, the steel ball 7 and the return spring 8 are arranged in the embedded cylinder 6, and the return spring 8 extrudes the steel ball 7 to one end of the embedded cylinder 6 close to the rodless cavity 61;
the floating piston 3 is arranged in the rodless cavity 61, and the floating piston 3 is separated from the gas cavity 31 in the rodless cavity 61;
the gas chamber 31 is filled with high-pressure nitrogen gas, and the rod chamber 51 is filled with hydraulic oil.
Optionally, the inner wall of the embedded cylinder 6 is step-shaped, and the steel ball 7 is arranged at the bottom of the end of the embedded cylinder 6 with the smaller inner diameter.
Optionally, the one-way damping type gas spring still includes: an O-shaped sealing ring 4;
at least one group of O-shaped sealing rings 4 are arranged between the single lug I2 and the outer cylinder 1;
at least one group of O-shaped sealing rings 4 are arranged between the floating piston 3 and the outer cylinder 1;
at least one group of O-shaped sealing rings 4 is arranged between one end of the piston rod 5 arranged in the outer cylinder 1 and the outer cylinder 1.
Optionally, the one-way damping type gas spring still includes: the device comprises a guide sleeve I9, a protective ring I10, a protective ring II 11, a rectangular sealing ring 12, a guide sleeve II 13 and a guide sleeve III 14;
the protection ring I10, the protection ring II 11, the rectangular sealing ring 12, the guide sleeve II 13 and the guide sleeve III 14 are fixedly arranged in the other end of the outer barrel 1 in sequence along the axial direction; the protection ring I10, the protection ring II 11, the rectangular sealing ring 12 and the guide sleeve II 13 are all sleeved on the piston rod 5;
the guide sleeve I9 is fixedly provided with the protection ring I10 and is sleeved on the piston rod 5 and the protection ring I10;
the guide sleeve III 14 is fixedly provided with the protection ring I10 and sleeved on the guide sleeve I9, the protection ring II 11, the rectangular sealing ring 12 and the guide sleeve II 13.
Optionally, at least one group of O-ring seals 4 is disposed between the guide sleeve iii 14 and the outer cylinder 1.
Optionally, the single lug i 2 and the outer cylinder 1, and the guide sleeve iii 14 and the outer cylinder 1 are sealed by rotary compression.
Optionally, the oil passing hole 52 is in a Y shape, a central axis of the oil passing hole 52 is coaxial with an axis of the piston rod 5, and an arm axis of the oil passing hole 52 forms an included angle with the axis of the piston rod 5;
the damping hole 53 is parallel to the axial direction of the piston rod 5;
the diameter of the oil passing hole 52 is larger than that of the damping hole 53.
The utility model has the advantages that:
the utility model provides an one-way damping type air spring for aircraft hatch door, include: the device comprises an outer cylinder 1, a single lug I2, a floating piston 3, a piston rod 5, an embedded cylinder 6, a steel ball 7, a return spring 8, a single lug II 15 and a joint bearing 16; one end of the single lug I2 is fixedly connected with one end of the outer barrel 1, and the other end of the single lug I2 is connected with the fixed end of the cabin door through a joint bearing 16; one end of the single lug II 15 is connected with one end of the piston rod 5, and the other end of the single lug II 15 is connected with the movable end of the cabin door through a joint bearing 16; the other end of the piston rod 5 is provided with an annular bulge which penetrates through the outer barrel 1 to separate the outer barrel 1 into a rod cavity 51 and a rodless cavity 61; the annular bulge is provided with at least one damping hole 53 which is uniformly distributed, the other end of the piston rod 5 is provided with an oil passing hole 52, and both the oil passing hole 52 and the damping hole 53 can be communicated with the rod cavity 51 and the rodless cavity 61; the embedded cylinder 6 is arranged in the oil passing hole 52, the steel ball 7 and the return spring 8 are arranged in the embedded cylinder 6, and the return spring 8 extrudes the steel ball 7 to one end of the embedded cylinder 6 close to the rodless cavity 61; the floating piston 3 is arranged in the rodless cavity 61, and the floating piston 3 is separated from the gas cavity 31 in the rodless cavity 61; the gas chamber 31 is filled with high-pressure nitrogen gas, and the rod chamber 51 is filled with hydraulic oil. The steel ball-spring is used as an opening and closing valve to open and close oil passages of oil in the rod cavity and the rodless cavity, so that the gas spring has a one-way damping effect when stretched, the floating piston is added to form two compartments, the oil and the gas are isolated, and the functions of buffering and compensating the oil are achieved by utilizing the compressibility of the gas.
Drawings
Fig. 1 is a schematic structural view of a one-way damping type gas spring for an aircraft door according to an embodiment of the present invention;
fig. 2 is a schematic view of an oil passing hole provided in an embodiment of the present invention;
description of reference numerals:
1-outer cylinder; 2-monaural I; 3-a floating piston;
4 o-ring seal; 5-a piston rod; 6, embedding a cylinder;
7, steel balls; 8-a return spring; 9-a guide sleeve I;
10-protective ring I; 11-guard circle II; 12-rectangular sealing ring;
13-a guide sleeve II; 14-a guide sleeve III; 15-monaural II;
16 knuckle bearing.
Detailed Description
Fig. 1 is the utility model provides a structural schematic diagram of a one-way damping type gas spring for aircraft hatch door, fig. 2 are the utility model discloses the schematic diagram of the oilhole that crosses that the embodiment provides, as shown in fig. 1 and 2, the utility model provides a one-way damping type gas spring for aircraft hatch door includes: the device comprises an outer cylinder 1, a single lug I2, a floating piston 3, an O-shaped sealing ring 4, a piston rod 5, an embedded cylinder 6, a steel ball 7, a reset spring 8, a guide sleeve I9, a protection ring I10, a protection ring II 11, a rectangular sealing ring 12, a guide sleeve II 13, a guide sleeve III 14, a single lug II 15 and a joint bearing 16; wherein,
the single lug I2, the single lug II 15 and the outer barrel 1 enclose a closed cavity;
an integrated piston rod 5 is arranged in the closed cavity, a piston integrated with the piston rod is arranged at one end of the piston rod, a groove for installing an O-shaped sealing ring 4 is formed in the piston, the other end of the piston rod extends outwards, penetrates through a guide sleeve I9, a protection ring I10, a protection ring II 11, a rectangular sealing ring 12, a guide sleeve II 13 and a guide sleeve III 14 and is connected with a single lug II 15 through threads; the piston rod divides the closed cavity into a rod cavity 51 and a rodless cavity 61, and the rod cavity and the rodless cavity form an oil damping channel with two cavities through a dry damping hole 53 arranged on the piston rod; the rodless cavity is internally provided with a floating piston 3 which divides the rodless cavity into a rodless cavity 61 and a gas cavity 31, and the gas cavity 31 is filled with high-pressure nitrogen.
The steel ball 7 is pressed into the embedded cylinder 6 through the reset spring 8, a through hole is formed in one end, far away from the piston rod, of the embedded cylinder 6, the diameter of the through hole is smaller than that of the steel ball, the embedded cylinder 6 is pressed into the piston rod through a mounting hole in the bottom end of the piston rod, and an oil through hole 52 is formed in the piston rod to form a rodless cavity and a rodless cavity oil way communication channel.
The single ear I2 and the single ear II 15 are provided with mounting holes, and the knuckle bearing 16 is mounted on the single ear I and the single ear II and is conveniently used for adjusting the mounting height and the mounting angle.
The main working principle is as follows: hydraulic oil is sealed on both sides of the piston rod 5 and high pressure gas is sealed in the floating piston gas chamber. When the cabin door or the cabin cover is closed, the gas spring is in a fully retracted state; when the cabin door or the cabin cover is opened downwards, the gas spring is continuously stretched under the gravity action of the cabin door, one end of the piston rod extends out, the steel ball moves leftwards under the action of the spring force and the oil pressure in the rod cavity 51 to press the groove of the embedded cylinder, the oil way is completely closed, oil can only flow to the left rodless cavity through the long and thin damping hole 53 in the piston rod, the long and thin damping hole 53 provides a damping effect, high-pressure gas expands to push the floating piston 3 to move rightwards, and the rod-less cavity 61 vacuumizes part of the oil to occupy the volume when the compensation piston rod 5 extends out. When the cabin door or the cabin cover is closed upwards, the cabin door is lifted by hands to enable the gas spring to be compressed, the piston rod retracts, the steel ball moves the compression spring rightwards under the action of oil pressure of the rodless cavity 61 and is separated from the groove of the embedded cylinder, the oil way is completely opened, oil flows into the rod cavity through the oil through hole in the middle of the piston rod, the damping effect of the long and thin damping hole is negligible, the floating piston moves leftwards, and high-pressure gas recovers the compression state from the expansion state to play a buffering effect.
The piston rod is provided with a Y-shaped oil through hole 52, oil flows through the oil through hole, the steel ball-spring as an opening and closing valve is communicated with a rod cavity and a rodless cavity, the valve is closed when the piston rod extends out, and the slender holes distributed on the piston rod are used as damping holes to generate a damping effect; when the piston rod retracts, the valve is opened, and the damping effect of the elongated hole on the piston rod can be ignored. The floating piston is arranged in the cylinder body of the air spring, plays roles of buffering and compensating, avoids the phenomena of vacuumizing and rebounding during retraction when the piston rod extends out of the rod-free cavity, and provides stable one-way damping force.
Claims (7)
1. A one-way damped gas spring for an aircraft door comprising: the device comprises an outer cylinder (1), a single lug I (2), a floating piston (3), a piston rod (5), an embedded cylinder (6), a steel ball (7), a return spring (8), a single lug II (15) and a joint bearing (16);
one end of the single lug I (2) is fixedly connected with one end of the outer cylinder (1), and the other end of the single lug I (2) is connected with the fixed end of the cabin door through a joint bearing (16);
one end of the single lug II (15) is connected with one end, far away from the piston, of the piston rod (5), and the other end of the single lug II (15) is connected with the movable end of the cabin door through a joint bearing (16);
the other end of the piston rod (5) is provided with an annular bulge, the annular bulge penetrates through the outer cylinder (1) to separate the outer cylinder (1) into a rod cavity (51) and a rodless cavity (61);
the annular bulge is provided with at least one damping hole (53) which is uniformly distributed, the other end of the piston rod (5) is provided with an oil passing hole (52), and the oil passing hole (52) and the damping hole (53) can be communicated with the rod cavity (51) and the rodless cavity (61);
the embedded cylinder (6) is arranged in the oil passing hole (52), the steel ball (7) and the return spring (8) are arranged in the embedded cylinder (6), and the return spring (8) extrudes the steel ball (7) to one end, close to the rodless cavity (61), of the embedded cylinder (6);
the floating piston (3) is arranged in the rodless cavity (61), and the floating piston (3) is separated from the gas cavity (31) in the rodless cavity (61);
the gas cavity (31) is filled with high-pressure nitrogen, and the rod cavity (51) is filled with hydraulic oil.
2. A one-way damping gas spring as claimed in claim 1, wherein the inner wall of the sleeve insert (6) is stepped, and the steel ball (7) is disposed at the bottom of the end of the sleeve insert (6) having the smaller inner diameter.
3. A one-way damped gas spring as set forth in claim 1 and further comprising: an O-shaped seal ring (4);
at least one group of O-shaped sealing rings (4) are arranged between the single lug I (2) and the outer cylinder (1);
at least one group of O-shaped sealing rings (4) is arranged between the floating piston (3) and the outer cylinder (1);
at least one group of O-shaped sealing rings (4) are arranged between one end of the piston rod (5) arranged in the outer cylinder (1) and the outer cylinder (1).
4. A one-way damped gas spring as set forth in claim 3 further comprising: the device comprises a guide sleeve I (9), a protective ring I (10), a protective ring II (11), a rectangular sealing ring (12), a guide sleeve II (13) and a guide sleeve III (14);
the protection ring I (10), the protection ring II (11), the rectangular sealing ring (12), the guide sleeve II (13) and the guide sleeve III (14) are fixedly arranged in the other end of the outer barrel (1) along the axial direction in sequence; the protection ring I (10), the protection ring II (11), the rectangular sealing ring (12) and the guide sleeve II (13) are sleeved on the piston rod (5);
the guide sleeve I (9) is fixedly provided with the protection ring I (10) and sleeved on the piston rod (5) and the protection ring I (10);
the guide sleeve III (14) is fixedly provided with the protection ring I (10) and sleeved with the guide sleeve I (9), the protection ring II (11), the rectangular sealing ring (12) and the guide sleeve II (13).
5. A one-way damped gas spring as claimed in claim 4 wherein at least one set of said O-rings (4) is disposed between said guide sleeve III (14) and said outer cylinder (1).
6. A one-way damped gas spring as set forth in claim 4 wherein said one lug I (2) and said outer cylinder (1) and said guide sleeve III (14) and said outer cylinder (1) are sealed by rotational crimping.
7. The one-way damping type gas spring as claimed in claim 1, wherein the oil passing hole (52) is Y-shaped, a central axis of the oil passing hole (52) is coaxial with an axis of the piston rod (5), and an arm axis of the oil passing hole (52) forms an included angle with the axis of the piston rod (5);
the damping hole (53) is parallel to the axial direction of the piston rod (5);
the aperture of the oil passing hole (52) is larger than that of the damping hole (53).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020716161.1U CN213869437U (en) | 2020-04-30 | 2020-04-30 | One-way damping type air spring for airplane cabin door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020716161.1U CN213869437U (en) | 2020-04-30 | 2020-04-30 | One-way damping type air spring for airplane cabin door |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213869437U true CN213869437U (en) | 2021-08-03 |
Family
ID=77032476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020716161.1U Active CN213869437U (en) | 2020-04-30 | 2020-04-30 | One-way damping type air spring for airplane cabin door |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213869437U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113944390A (en) * | 2021-10-15 | 2022-01-18 | 兰州空间技术物理研究所 | Spacecraft cabin door opening and closing device |
-
2020
- 2020-04-30 CN CN202020716161.1U patent/CN213869437U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113944390A (en) * | 2021-10-15 | 2022-01-18 | 兰州空间技术物理研究所 | Spacecraft cabin door opening and closing device |
| CN113944390B (en) * | 2021-10-15 | 2023-05-02 | 兰州空间技术物理研究所 | Spacecraft cabin door opening and closing device |
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