阅读说明：本技术 一种广角多缓冲变形装配着陆支撑机构 (Wide-angle multi-buffer deformation assembly landing supporting mechanism ) 是由 张东 张宏剑 王辰 于兵 乐晨 王迪 章凌 王婧超 张志峰 吴会强 张希 朱锡 于 2021-08-31 设计创作，主要内容包括：一种广角多缓冲变形装配着陆支撑机构,由张开机构、跨距扩展机构组成,张开机构与跨距扩展机构均设置于火箭本体上,为火箭提供着陆冲击环境,着陆支撑机构用于保证火箭上升段气动外形,并在火箭回收着陆过程中保证火箭稳定性大跨距需求,着陆支撑机构于火箭着陆后可进行回收,结构简单,安装方便,可重复使用。(The utility model provides a wide angle multi-buffering deformation assembly landing supporting mechanism, comprises expanding mechanism, span extension mechanism, and expanding mechanism and span extension mechanism all set up on the rocket body, provide landing impact environment for the rocket, and landing supporting mechanism is used for guaranteeing the aerodynamic appearance of rocket up-take to guarantee the big span demand of rocket stability in the rocket recovery landing process, landing supporting mechanism can retrieve after the rocket lands, simple structure, and simple to operate can repeatedly use.)

1. The utility model provides a many cushions of wide angle support mechanism that lands that warp which characterized in that:

the landing support mechanism is composed of the opening mechanism and the span extension mechanism, is used for guaranteeing the aerodynamic appearance of a rocket ascending section, guarantees the requirement of rocket stability and large span in the process of rocket recovery and landing, and can be recovered after the rocket is landed.

2. The wide-angle multi-cushion deformation assembly landing support mechanism of claim 1, wherein:

the opening mechanism comprises a support, an installation pin shaft, a first left shaft end baffle, a first right shaft end baffle, a trunnion, a first fixing ring, an opening mechanism spring, a first cylinder barrel, a left locking spring, a right locking spring, a left bolt, a right bolt, a left fixing nut, a right fixing nut, a first driving rod, a first sealing ring, a second sealing ring, a hinge pin shaft, an opening mechanism support, a support, a support pin shaft, a left support pin shaft end baffle and a right support pin shaft end baffle, wherein:

the support is installed on a rocket body, the support and a trunnion installation hole of a trunnion are connected through an installation pin shaft, a left shaft end baffle I and a right shaft end baffle I are arranged at the left end and the right end of the installation pin shaft, the trunnion external thread of the trunnion is in internal thread connection with one end part of a cylinder barrel of the cylinder barrel I, an opening mechanism spring is arranged on a driving rod I and then is installed inside the cylinder barrel I, a fixing ring external thread on the fixing ring I is in threaded connection with the internal thread of the cylinder barrel I, a left locking spring, a right locking spring, a left bolt and a right bolt are respectively installed in the left installation hole and the right installation hole of the cylinder barrel I, the external threads of the left fixing nut and the right fixing nut are respectively in threaded connection with the left installation hole and the right installation hole of the cylinder barrel I, the top end of the left bolt and the right bolt after installation are arranged in a guide groove of the driving rod I after passing through a locking hole of the fixing ring I, and a sealing ring II are arranged between the cylinder barrel I and the driving rod I, the connecting end of the first driving rod is connected with a driving hole of the opening mechanism support through a hinged pin shaft, a driven hole of the opening mechanism support is connected with a support installed on the rocket body through a connecting support pin shaft, and a left support pin shaft end baffle and a right support pin shaft end baffle are installed at two ends of the support pin shaft respectively.

3. The wide-angle multi-cushion deformation assembly landing support mechanism of claim 1, wherein:

the span expanding mechanism comprises an expanding mechanism support, a left shaft sleeve, a right shaft sleeve, a left shaft end baffle II, a right shaft end baffle II, an expanding mechanism pin shaft, a left shaft end baffle III, a right shaft end baffle III, a driving rod II, an expanding mechanism spring, a cylinder barrel II, a buffer cylinder barrel, a fixing ring II, a buffer spring, a buffer rod, a sealing ring III, a sealing ring IV, a foot pad pin shaft, a left foot pad pin shaft end baffle and a right foot pad pin shaft end baffle, wherein the left shaft sleeve and the right shaft sleeve are arranged in a hinge hole of the expanding mechanism support and are fixed through the left shaft end baffle II and the right shaft end baffle II after being connected with a hinge pin shaft of the expanding mechanism, so that the hinge pin shaft is prevented from axially moving; the driving hole of the expanding mechanism bracket is connected with the connecting end of the driving rod II through an expanding mechanism pin shaft, the left shaft end baffle III and the right shaft end baffle III are arranged at two ends of the expanding mechanism pin shaft, the expanding mechanism spring is arranged on the driving rod II and then arranged in the cylinder barrel II, the external threads of the fixing ring I on the fixing ring I are in threaded connection with the internal threads of the two end parts of the cylinder barrel II, the left locking spring, the right locking spring, the left bolt and the right bolt are respectively arranged in the left mounting hole and the right mounting hole of the cylinder barrel II, the external threads of the left fixing nut and the right fixing nut are respectively in threaded connection with the internal threads of the left mounting hole and the right mounting hole of the cylinder barrel II, the top ends of the left bolt and the right bolt after installation are just positioned in the guide groove of the driving rod II after passing through the locking hole of the fixing ring II, a sealing ring I and a sealing ring II are arranged between the cylinder barrel II and the driving rod, and the trunnion mounting holes of the support and the trunnion are connected through the mounting pin shaft, and a first left shaft end baffle and a first right shaft end baffle are arranged at the left end and the right end of the mounting pin shaft, and the trunnion external thread of the trunnion is connected with the internal thread at the two end parts of the cylinder barrel of the second cylinder barrel.

4. The wide-angle multi-cushion deformation assembly landing support mechanism of claim 1, wherein:

the buffer cylinder inner thread of the buffer cylinder barrel is connected with the connecting thread of the extension mechanism support, the buffer rod is provided with a buffer spring and then is installed inside the buffer cylinder barrel, the outer thread of the fixing ring on the fixing ring II is connected with the inner thread of the cylinder barrel punching of the buffer cylinder barrel, a third sealing ring and a fourth sealing ring are arranged between the buffer cylinder barrel and the buffer rod, the buffer rod connecting end of the buffer rod is connected with the foot pad through the foot pad pin shaft, and the left and right ends of the foot pad pin shaft are provided with a left foot pad pin shaft end baffle and a right foot pad pin shaft end baffle.

5. The wide-angle multi-cushion deformation assembly landing support mechanism of claim 1, wherein:

the trunnion is provided with trunnion mounting hole and trunnion external screw thread on the trunnion, gu fixed ring one is last to be provided with a solid fixed ring external screw thread, gu fixed ring a locking hole and solid fixed ring handle hole.

6. The wide-angle multi-cushion deformation assembly landing support mechanism of claim 1, wherein:

the left end and the right end of the first cylinder barrel are respectively provided with a left mounting hole and a right mounting hole of the first cylinder barrel, internal threads of the left mounting hole and the right mounting hole of the first cylinder barrel, a medium port of the first cylinder barrel, an internal thread of one end of the first cylinder barrel and an internal thread of the first cylinder barrel, one end of the first driving rod is provided with a connecting end, the other end of the first driving rod is provided with a locking hole of the driving rod, a guiding groove of the driving rod communicated with the locking hole of the driving rod and a sealing ring mounting ring of the driving rod.

7. The wide-angle multi-cushion deformation assembly landing support mechanism of claim 1, wherein:

the opening mechanism support is provided with a driving hole and a driven hole, the expansion mechanism support is provided with a hinge hole, a driving hole, a connecting thread and a long hole, one end of the second driving rod is provided with a connecting end, the other end of the second driving rod is provided with a second driving rod locking hole, and a second driving rod guide groove and a second driving rod sealing ring mounting ring which are communicated with the second driving rod locking hole.

8. The wide-angle multi-cushion deformation assembly landing support mechanism of claim 1, wherein:

the left end and the right end of the second cylinder barrel are respectively provided with a second left mounting hole and a second right mounting hole of the cylinder barrel, the inner threads of the second left mounting hole and the second right mounting hole of the cylinder barrel, a second medium port of the cylinder barrel, the inner threads of the two end parts of the cylinder barrel and the second inner threads of the cylinder barrel, and the buffering cylinder barrel is provided with the internal threads of the buffering cylinder barrel and the medium port of the buffering cylinder barrel.

9. The wide-angle multi-cushion deformation assembly landing support mechanism of claim 1, wherein:

the second fixing ring is provided with two external threads of the fixing ring, a second locking hole of the fixing ring and a second operation hole of the fixing ring.

10. The wide-angle multi-cushion deformation assembly landing support mechanism of claim 1, wherein:

and the buffer rod is provided with a buffer rod connecting end and a sealing ring mounting ring.

Technical Field

The invention relates to a wide-angle multi-buffer deformation assembly landing support mechanism, and belongs to the field of landing buffer mechanism design.

Background

The recoverable carrier rocket has wide application prospect because the launching cost can be obviously reduced. The existing rocket recovery technology can be generally divided into an umbrella landing type, a flying return type with wings and a vertical return type. The parachute-type recovery scheme requires the rocket to carry a parachute, so that high requirements are provided for the structural design of the rocket, and the parachute descending process is greatly influenced by atmospheric operation; the winged flying-back type structure is not only complicated in mechanical structure, but also requires self ignition and braking of the rocket in the recovery process; in the vertical return type recovery scheme, the landing buffer device is directly related to success or failure of a recovery task.

The landing leg type landing buffer device adopts a foldable and extensible leg type structure, the buffer is arranged in the landing leg, and impact energy is absorbed through the compression deformation of the buffer in the landing process, so that the landing leg type landing buffer device has the advantages of high landing reliability, good controllability, strong adjustability, no rebound during landing and the like. However, the leg type land buffer device has the contradiction that the main supporting leg is too long, the rocket has poor landing stability, the main supporting leg is too short, the span of the buffer device on the ground after being unfolded is small, and the rocket is easy to turn on one side. Meanwhile, part of the active carrier rockets in China can only be used once and cannot be recycled.

Disclosure of Invention

The technical problem solved by the invention is as follows: aiming at the problems of poor stability, small span and incapability of recycling of a carrier rocket leg type landing buffer device in the prior art, the wide-angle multi-buffer deformation assembly landing support mechanism is provided.

The technical scheme for solving the technical problems is as follows:

the wide-angle multi-buffer deformation assembly landing support mechanism comprises an opening mechanism and a span extension mechanism, wherein the opening mechanism and the span extension mechanism are both arranged on a rocket body and provide a landing impact environment for the rocket, the landing support mechanism consisting of the opening mechanism and the span extension mechanism is used for guaranteeing the aerodynamic appearance of a rocket ascending section and guaranteeing the requirement of the rocket for stability and large span in the process of recovering the rocket and landing, and the landing support mechanism can be recovered after the rocket is landed.

The opening mechanism comprises a support, an installation pin shaft, a first left shaft end baffle, a first right shaft end baffle, a trunnion, a first fixing ring, an opening mechanism spring, a first cylinder barrel, a left locking spring, a right locking spring, a left bolt, a right bolt, a left fixing nut, a right fixing nut, a first driving rod, a first sealing ring, a second sealing ring, a hinge pin shaft, an opening mechanism support, a support, a support pin shaft, a left support pin shaft end baffle and a right support pin shaft end baffle, wherein:

the support is installed on a rocket body, the support and a trunnion installation hole of a trunnion are connected through an installation pin shaft, a left shaft end baffle I and a right shaft end baffle I are arranged at the left end and the right end of the installation pin shaft, the trunnion external thread of the trunnion is in internal thread connection with one end part of a cylinder barrel of the cylinder barrel I, an opening mechanism spring is arranged on a driving rod I and then is installed inside the cylinder barrel I, a fixing ring external thread on the fixing ring I is in threaded connection with the internal thread of the cylinder barrel I, a left locking spring, a right locking spring, a left bolt and a right bolt are respectively installed in the left installation hole and the right installation hole of the cylinder barrel I, the external threads of the left fixing nut and the right fixing nut are respectively in threaded connection with the left installation hole and the right installation hole of the cylinder barrel I, the top end of the left bolt and the right bolt after installation are arranged in a guide groove of the driving rod I after passing through a locking hole of the fixing ring I, and a sealing ring II are arranged between the cylinder barrel I and the driving rod I, the connecting end of the first driving rod is connected with a driving hole of the opening mechanism support through a hinged pin shaft, a driven hole of the opening mechanism support is connected with a support installed on the rocket body through a connecting support pin shaft, and a left support pin shaft end baffle and a right support pin shaft end baffle are installed at two ends of the support pin shaft respectively.

The span expanding mechanism comprises an expanding mechanism support, a left shaft sleeve, a right shaft sleeve, a left shaft end baffle II, a right shaft end baffle II, an expanding mechanism pin shaft, a left shaft end baffle III, a right shaft end baffle III, a driving rod II, an expanding mechanism spring, a cylinder barrel II, a buffer cylinder barrel, a fixing ring II, a buffer spring, a buffer rod, a sealing ring III, a sealing ring IV, a foot pad pin shaft, a left foot pad pin shaft end baffle and a right foot pad pin shaft end baffle, wherein the left shaft sleeve and the right shaft sleeve are arranged in a hinge hole of the expanding mechanism support and are fixed through the left shaft end baffle II and the right shaft end baffle II after being connected with a hinge pin shaft of the expanding mechanism, so that the hinge pin shaft is prevented from axially moving; the driving hole of the expanding mechanism bracket is connected with the connecting end of the driving rod II through an expanding mechanism pin shaft, the left shaft end baffle III and the right shaft end baffle III are arranged at two ends of the expanding mechanism pin shaft, the expanding mechanism spring is arranged on the driving rod II and then arranged in the cylinder barrel II, the external threads of the fixing ring I on the fixing ring I are in threaded connection with the internal threads of the two end parts of the cylinder barrel II, the left locking spring, the right locking spring, the left bolt and the right bolt are respectively arranged in the left mounting hole and the right mounting hole of the cylinder barrel II, the external threads of the left fixing nut and the right fixing nut are respectively in threaded connection with the internal threads of the left mounting hole and the right mounting hole of the cylinder barrel II, the top ends of the left bolt and the right bolt after installation are just positioned in the guide groove of the driving rod II after passing through the locking hole of the fixing ring II, a sealing ring I and a sealing ring II are arranged between the cylinder barrel II and the driving rod, and the trunnion mounting holes of the support and the trunnion are connected through the mounting pin shaft, and a first left shaft end baffle and a first right shaft end baffle are arranged at the left end and the right end of the mounting pin shaft, and the trunnion external thread of the trunnion is connected with the internal thread at the two end parts of the cylinder barrel of the second cylinder barrel.

The buffer cylinder inner thread of the buffer cylinder barrel is connected with the connecting thread of the extension mechanism support, the buffer rod is provided with a buffer spring and then is installed inside the buffer cylinder barrel, the outer thread of the fixing ring on the fixing ring II is connected with the inner thread of the cylinder barrel punching of the buffer cylinder barrel, a third sealing ring and a fourth sealing ring are arranged between the buffer cylinder barrel and the buffer rod, the buffer rod connecting end of the buffer rod is connected with the foot pad through the foot pad pin shaft, and the left and right ends of the foot pad pin shaft are provided with a left foot pad pin shaft end baffle and a right foot pad pin shaft end baffle.

The trunnion is provided with trunnion mounting hole and trunnion external screw thread on the trunnion, gu fixed ring one is last to be provided with a solid fixed ring external screw thread, gu fixed ring a locking hole and solid fixed ring handle hole.

The left end and the right end of the first cylinder barrel are respectively provided with a left mounting hole and a right mounting hole of the first cylinder barrel, internal threads of the left mounting hole and the right mounting hole of the first cylinder barrel, a medium port of the first cylinder barrel, an internal thread of one end of the first cylinder barrel and an internal thread of the first cylinder barrel, one end of the first driving rod is provided with a connecting end, the other end of the first driving rod is provided with a locking hole of the driving rod, a guiding groove of the driving rod communicated with the locking hole of the driving rod and a sealing ring mounting ring of the driving rod.

The opening mechanism support is provided with a driving hole and a driven hole, the expansion mechanism support is provided with a hinge hole, a driving hole, a connecting thread and a long hole, one end of the second driving rod is provided with a connecting end, the other end of the second driving rod is provided with a second driving rod locking hole, and a second driving rod guide groove and a second driving rod sealing ring mounting ring which are communicated with the second driving rod locking hole.

The left end and the right end of the second cylinder barrel are respectively provided with a second left mounting hole and a second right mounting hole of the cylinder barrel, the inner threads of the second left mounting hole and the second right mounting hole of the cylinder barrel, a second medium port of the cylinder barrel, the inner threads of the two end parts of the cylinder barrel and the second inner threads of the cylinder barrel, and the buffering cylinder barrel is provided with the internal threads of the buffering cylinder barrel and the medium port of the buffering cylinder barrel.

The second fixing ring is provided with two external threads of the fixing ring, a second locking hole of the fixing ring and a second operation hole of the fixing ring.

And the buffer rod is provided with a buffer rod connecting end and a sealing ring mounting ring.

Compared with the prior art, the invention has the advantages that:

the wide-angle multi-buffer deformation assembly landing support mechanism provided by the invention can be repeatedly used, can realize the landing support functions of a folded, large-span and multi-buffer carrier rocket, and can meet the requirement of large span on the return stability of the carrier rocket and provide a good landing impact environment for the carrier rocket on the basis of ensuring the good aerodynamic appearance of the ascending section of the carrier rocket. The problem that the overall aerodynamic appearance of the carrier rocket in the ascending section is small after the carrier rocket is folded against the landing mechanism and the span is large when the carrier rocket returns to the landing section and the landing mechanism is unfolded is solved, the overall bearing capacity of the landing support mechanism can be greatly improved, and the stability and the reliability are greatly improved.

Drawings

FIG. 1 is a three-dimensional view of the invention in a collapsed condition;

FIG. 2 is a three-dimensional view of the invention in an expanded state;

FIG. 3 is an exploded view of the deployment mechanism provided by the present invention;

FIG. 4 is a three-dimensional view of the deployment mechanism in a collapsed state in accordance with the present invention;

FIG. 5 is a two-dimensional view of the deployment mechanism in a collapsed state as provided by the present invention;

FIG. 6 is a cross-sectional view of the two-dimensional view A-A of the deployment mechanism in a collapsed state provided by the present invention;

FIG. 7 is a cross-sectional view of the two-dimensional view B-B of the deployment mechanism in a collapsed state provided by the present invention;

FIG. 8 is a three-dimensional view of the invention in the deployed state of the deployment mechanism;

FIG. 9 is a two-dimensional view of the deployed state of the deployment mechanism provided by the present invention;

FIG. 10 is a cross-sectional view of the deployment mechanism of the present invention in an expanded state, shown in two-dimensional view as C-C;

FIG. 11 is a cross-sectional view of the deployment mechanism of the present invention in the deployed state, as seen in two-dimensional view D-D;

FIG. 12 is an exploded view of a span extension mechanism provided by the present invention;

FIG. 13 is a three-dimensional view of the span extension mechanism in a collapsed state provided by the present invention;

FIG. 14 is a two-dimensional view of a span extension mechanism in a collapsed state provided by the present invention;

FIG. 15 is a cross-sectional view of the span extension mechanism provided in the present invention in a collapsed condition as illustrated in two-dimensional views E-E;

FIG. 16 is a cross-sectional view of the span extension mechanism shown in a collapsed condition in the two-dimensional view F-F in accordance with the present invention;

FIG. 17 is a cross-sectional view of the span extension mechanism shown in a collapsed condition in the two-dimensional view of FIG. G-G;

FIG. 18 is a three-dimensional view of the span extension mechanism of the present invention in an extended state;

FIG. 19 is a two-dimensional view of the span extension mechanism of the present invention in an extended state;

FIG. 20 is a cross-sectional view of the span extension mechanism of the present invention in an expanded state, shown in three-dimensional view in section H-H;

FIG. 21 is a cross-sectional view of the span extension mechanism of the present invention in an expanded state, shown in three-dimensional view as I;

FIG. 22 is a cross-sectional view J-J of the span extension mechanism of the present invention in an expanded state;

FIG. 23 is a three-dimensional view of the trunnion provided by the invention;

FIG. 24 is a three-dimensional view of a first retaining ring provided in accordance with the present invention;

FIG. 25 is a two-dimensional view of a cylinder barrel I provided by the present invention;

FIG. 26 is a three-dimensional view of a first drive rod provided by the present invention;

FIG. 27 is a three-dimensional view of the stent of the deployment mechanism provided by the present invention;

FIG. 28 is a three-dimensional view of the stent of the expansion mechanism provided by the present invention;

fig. 29 is a three-dimensional view of a second driving rod provided by the invention;

FIG. 30 is a two-dimensional view of a second cylinder barrel provided in the present invention;

FIG. 31 is a three-dimensional view of the cushion cylinder provided by the present invention;

FIG. 32 is a three-dimensional view of a second retaining ring provided in accordance with the present invention;

FIG. 33 is a three-dimensional view of a bumper beam provided by the present invention

Detailed Description

The wide-angle multi-buffer deformation assembly landing support mechanism comprises an opening mechanism and a span extension mechanism, wherein the opening mechanism and the span extension mechanism are both arranged on a rocket body and provide a landing impact environment for the rocket, the landing support mechanism is used for ensuring the aerodynamic appearance of an ascending section of the rocket and ensuring the requirement of the rocket for stability and large span in the process of recovering and landing the rocket, and the landing support mechanism can be recovered after the rocket is landed.

As shown in fig. 1 and 2, the landing support mechanism of the foldable large-span multi-buffering carrier rocket capable of being reused comprises an opening mechanism and a span expanding mechanism.

As shown in fig. 3 to 11, the opening mechanism includes a support, a mounting pin, a first left shaft end baffle, a first right shaft end baffle, a trunnion, a first fixing ring, an opening mechanism spring, a first cylinder, a first left locking spring, a first right locking spring, a first left bolt, a first right bolt, a first left fixing nut, a first driving rod, a first sealing ring, a second sealing ring, a hinge pin, an opening mechanism support, a support, a support pin and a first left support pin shaft end baffle and a second support pin shaft end baffle. The support is installed on the rocket body, the support and the trunnion installation hole of the trunnion are connected through an installation pin shaft, and a left shaft end baffle plate and a right shaft end baffle plate are arranged at the left end and the right end of the installation pin shaft. The trunnion external thread of the trunnion is connected with the inner thread at one end part of the first cylinder barrel, the drive rod I is provided with an opening mechanism spring and then is installed inside the first cylinder barrel, and the trunnion external thread is connected with the inner thread of the first cylinder barrel through the fixed ring on the first fixed ring. Meanwhile, a left locking spring, a right locking spring, a left bolt and a right bolt are respectively installed in a left mounting hole and a right mounting hole of a cylinder barrel I, and external threads of a left fixing nut and a right fixing nut are respectively in threaded connection with the left mounting hole and the right mounting hole of the cylinder barrel I; the top ends of the left and right inserted pins after installation are just positioned in a guide groove of a driving rod after penetrating through a locking hole of a fixing ring, a first sealing ring and a second sealing ring are arranged between the first cylinder barrel and the first driving rod, the connecting end of the first driving rod is connected with a driving hole of an opening mechanism support through a hinged pin shaft, a driven hole of the opening mechanism support is connected with a support installed on a rocket body through a connecting support pin shaft, and shaft end baffles of the left and right support pin shafts are installed at two ends of the support pin shaft.

As shown in fig. 12 to 22, the span extension mechanism includes an extension mechanism bracket, a left shaft sleeve, a right shaft sleeve, a left shaft end baffle plate second, a right shaft end baffle plate second, an extension mechanism pin shaft, a left shaft end baffle plate third, a driving rod second, an extension mechanism spring, a cylinder barrel second, a buffer cylinder barrel, a fixing ring second, a buffer spring, a buffer rod, a sealing ring third, a sealing ring fourth, a foot pad pin shaft, and a left foot pad pin shaft end baffle plate and a right foot pad pin shaft end baffle plate. The left shaft sleeve and the right shaft sleeve are arranged in a hinge hole of the expanding mechanism support and are fixed through a left shaft end baffle plate and a right shaft end baffle plate after being connected with a hinge pin shaft of the expanding mechanism, so that the hinge pin shaft is prevented from moving axially. The driving hole of the expanding mechanism bracket is connected with the connecting end of the driving rod II through an expanding mechanism pin shaft, and the left shaft end baffle plate and the right shaft end baffle plate are arranged at two ends of the expanding mechanism pin shaft. And the second driving rod is provided with an extension mechanism spring and then is installed inside the second cylinder barrel, and the second driving rod is in threaded connection with the internal thread of the second end part of the second cylinder barrel through the external thread of the first fixing ring on the first fixing ring. Meanwhile, a left locking spring, a right locking spring, a left bolt and a right bolt are respectively installed in a left mounting hole and a right mounting hole of the cylinder barrel II, and external threads of a left fixing nut and a right fixing nut are respectively in threaded connection with the left mounting hole and the right mounting hole of the cylinder barrel II; the top ends of the installed left and right bolts penetrate through locking holes of the second fixing ring and then are just positioned in guide grooves of the second driving rod, and a first sealing ring and a second sealing ring are arranged between the second cylinder barrel and the second driving rod; the support and the trunnion mounting hole of the trunnion are connected through a mounting pin shaft, and a left shaft end baffle plate I and a right shaft end baffle plate I are arranged at the left end and the right end of the mounting pin shaft. And the trunnion external thread of the trunnion is connected with the internal thread at the two ends of the cylinder barrel II.

As shown in fig. 12 to 22, the internal thread of the buffer cylinder barrel is in threaded connection with the connecting thread of the extension mechanism bracket, the buffer rod is provided with the buffer spring and then is installed inside the buffer cylinder barrel, and the external thread of the fixing ring on the second fixing ring is in threaded connection with the internal thread of the cylinder barrel of the buffer cylinder barrel. A third sealing ring and a fourth sealing ring are arranged between the buffer cylinder barrel and the buffer rod, the buffer rod connecting end of the buffer rod is connected with the foot pad through a foot pad pin shaft, and left and right foot pad pin shaft end baffles are arranged at the left and right ends of the foot pad pin shaft.

The trunnion is provided with a trunnion mounting hole and an trunnion external thread; the first fixing ring is provided with an external thread, a locking hole and an operation hole. The left end and the right end of the first cylinder barrel are respectively provided with a left mounting hole and a right mounting hole of the first cylinder barrel, the left mounting hole and the right mounting hole of the first cylinder barrel are internally threaded, the first cylinder barrel is provided with a medium port, and an internal thread at one end part of the first cylinder barrel and an internal thread of the first cylinder barrel are arranged in the first mounting hole and the right mounting hole of the first cylinder barrel; one end of the driving rod I is provided with a connecting end, the other end of the driving rod I is provided with a driving rod I locking hole, a driving rod I guide groove and a driving rod I sealing ring mounting ring, and the driving rod I guide groove is communicated with the driving rod I locking hole;

the opening mechanism bracket is provided with a driving hole and a driven hole; the expansion mechanism bracket is provided with a hinge hole, a driving hole, a connecting thread and a long hole; one end of the driving rod II is provided with a connecting end, the other end of the driving rod II is provided with a driving rod II locking hole, a driving rod II guide groove communicated with the driving rod II locking hole and a driving rod II sealing ring mounting ring; the left end and the right end of the cylinder barrel II are respectively provided with a left mounting hole and a right mounting hole of the cylinder barrel II, the left mounting hole and the right mounting hole of the cylinder barrel II are internally threaded, the cylinder barrel II is provided with a medium port, two end internal threads of the cylinder barrel and two internal threads of the cylinder barrel II; the buffer cylinder barrel is provided with the internal thread of the buffer cylinder barrel and a medium port of the buffer cylinder barrel; the second fixing ring is provided with a second fixing ring external thread, a second fixing ring locking hole and a second fixing ring operating hole; the buffer rod is provided with a buffer rod connecting end and a sealing ring mounting ring.

The following is further illustrated with reference to specific examples:

as shown in fig. 1-33, 1-opening mechanism, 1.1-support, 1.2-mounting pin shaft, 1.3' -left and right shaft end baffle one, 1.4-trunnion, 1.4 a-trunnion mounting hole, 1.4 b-trunnion external thread, 1.5-fixing ring one, 1.5 a-fixing ring one external thread, 1.5 b-fixing ring one locking hole, 1.5 c-fixing ring one operating hole, 1.6-opening mechanism spring, 1.7-cylinder barrel one, 1.7a ' -cylinder barrel one left and right mounting hole, 1.7b ' -cylinder barrel one left and right mounting hole internal thread, 1.7 c-cylinder barrel one medium port, 1.7 d-cylinder barrel one end internal thread, 1.7 e-cylinder barrel one internal thread; 1.8, 1.8 '-left and right locking springs, 1.9' -left and right bolts, 1.10 '-left and right fixing nuts, 1.11-driving rod I, 1.11 a-connecting end, 1.11 b-driving rod I locking hole, 1.11 c-driving rod I guide groove, 1.11 d-driving rod I sealing ring mounting ring, 1.12-sealing ring I, 1.13-sealing ring II, 1.14-hinge pin, 1.15-opening mechanism bracket, 1.15 a-driving hole, 1.15 b-driven hole, 1.16-bracket support, 1.17-bracket pin, 1.18' left and right bracket pin shaft end baffle plate;

2-span expanding mechanism, 2.1-expanding mechanism bracket, 2.1 a-hinged hole, 2.1 b-driving hole, 2.1 c-connecting thread, 2.1 d-long hole, 2.2' -left and right shaft sleeve, 2.3' -left and right shaft end baffle II, 2.4-expanding mechanism pin shaft, 2.5' -left and right shaft end baffle III, 2.6-driving rod II, 2.6 a-connecting end, 2.6 b-driving rod II locking hole, 2.6 c-driving rod II guide groove, 2.6 d-driving rod II seal ring mounting ring, 2.7-expanding mechanism spring, 2.8-cylinder II, 2.8a ' -left and right mounting hole of cylinder II, 2.8b ' -left and right mounting hole internal thread of cylinder II, 2.8 c-cylinder II medium port, 2.8 d-two end internal thread, 2.8 e-a second inner thread of the cylinder barrel, 2.9-a buffer cylinder barrel, 2.9 a-a buffer cylinder barrel inner thread, 2.9 b-a buffer cylinder barrel medium port, 2.10-a second fixing ring, 2.10 a-a fixing ring outer thread, 2.10 b-a second fixing ring locking hole, 2.10 c-a second fixing ring operation hole, 2.11-a buffer spring, 2.12-a buffer rod, 2.12 a-a buffer rod connecting end and 2.12 b-a sealing ring mounting ring; 2.13-sealing ring three, 2.14-sealing ring four, 2.15-foot pad, 2.16-foot pad pin shaft, 2.17' -left and right foot pad pin shaft end baffle plate;

3-rocket body.

Specifically, the opening mechanism 1 comprises a support 1.1, a mounting pin shaft 1.2, a left shaft end baffle plate 1.3, a right shaft end baffle plate 1.3, a trunnion 1.4, a fixing ring 1.5, an opening mechanism spring 1.6, a cylinder barrel 1.7, a left locking spring 1.8, a right locking spring 1.8 ', a left bolt 1.9, a right bolt 1.9', a left fixing nut 1.10, a right fixing nut 1.10', a driving rod 1.11, a sealing ring I1.12, a sealing ring II 1.13, a hinge pin shaft 1.14, an opening mechanism support 1.15, a support 1.16, a support pin shaft 1.17, a left support pin shaft end baffle plate 1.18, and a right support pin shaft end baffle plate 1.18'. The support 1.1 is installed on the rocket body 3, the support 1.1 is connected with trunnion installation holes 1.4a of the trunnion 1.4 through an installation pin shaft 1.2, and left and right shaft end baffles 1.3 and 1.3' are arranged at the left end and the right end of the installation pin shaft 1.2 to prevent the installation pin shaft 1.2 from axially moving. The trunnion external thread 1.4b of the trunnion 1.4 is connected with the cylinder end internal thread 1.7d of the cylinder I1.7, the drive rod I1.11 is provided with the opening mechanism spring 1.6 and then is installed in the cylinder I1.7, and the opening mechanism spring 1.6 is prevented from moving towards the trunnion 1.4 direction after being in threaded connection with the cylinder I internal thread 1.7e of the cylinder I1.7 through the fixing ring I external thread 1.5a on the fixing ring I1.5. Meanwhile, a left locking spring 1.8, a right locking spring 1.8 ', a left bolt 1.9, a right bolt 1.9', a left fixing nut 1.10 and a right fixing nut 1.10' are respectively arranged in a left mounting hole 1.7a and a right mounting hole 1.7a ' of the cylinder barrel 1.7, and a left bolt 1.7a ' and a right bolt 1.9' are respectively arranged in a right mounting hole 1.7a and a right mounting hole 1.7a ', and the external threads of the left fixing nut 1.10 and the right fixing nut 1.10' are respectively in threaded connection with the internal threads 1.7b and 1.7b ' of the cylinder barrel I; the top ends of the left and right inserted pins 1.9 and 1.9 'after installation penetrate through a locking hole 1.5b of a fixing ring and then are just positioned in a guide groove 1.11c of a driving rod, a sealing ring I1.12 and a sealing ring II 1.13 are arranged between a cylinder I1.7 and a driving rod I1.11, a connecting end 1.11a of the driving rod I1.11 is connected with a driving hole 1.15a of an opening mechanism support 1.15 through a hinge pin 1.14, a driven hole 1.15b of the opening mechanism support 1.15 is connected with a support seat 1.16 installed on a rocket body 3 through a connecting support pin 1.17, and shaft end baffles 1.18 and 1.18' of the left and right support pins are installed at two ends of the support pin 1.17 to prevent the support pin 1.17 from axially moving.

The span expanding mechanism 2 comprises an expanding mechanism support 2.1, a left shaft sleeve 2.2, a right shaft sleeve 2.2', a left shaft end baffle II 2.3, a right shaft end baffle II 2.3', an expanding mechanism pin shaft 2.4, a left shaft end baffle III 2.5, a right shaft end baffle III 2.5', a driving rod II 2.6, an expanding mechanism spring 2.7, a cylinder II 2.8, a buffer cylinder 2.9, a fixing ring II 2.10, a buffer spring 2.11, a buffer rod 2.12, a sealing ring III 2.13, a sealing ring IV 2.14, a foot pad 2.15, a foot pad pin shaft 2.16, a left foot pad pin shaft end baffle II 2.17' and a right foot pad pin shaft end baffle II 2.17 '. The left shaft sleeve 2.2 and the right shaft sleeve 2.2 'are arranged in a hinge hole 2.1a of the expansion mechanism support 2.1 and are fixed through a left shaft end baffle plate 2.3 and a right shaft end baffle plate 2.3' after being connected with a hinge pin 1.14 of the opening mechanism 1, so that the hinge pin 1.14 is prevented from axially moving. The driving hole 2.1b of the expanding mechanism bracket 2.1 is connected with the connecting end 2.6a of the driving rod 2.6 through an expanding mechanism pin shaft 2.4, and the left shaft end baffle plate three 2.5 and the right shaft end baffle plate 2.5' are arranged at two ends of the expanding mechanism pin shaft 2.4, so that the expanding mechanism pin shaft 2.4 is prevented from axially moving. And the second driving rod 2.6 is provided with an extension mechanism spring 2.7 and then is arranged inside the second cylinder barrel 2.8, and the extension mechanism spring 2.7 is prevented from moving towards the trunnion 1.4 after being in threaded connection with the second cylinder barrel end internal thread 2.8d of the second cylinder barrel 2.8 through a first fixing ring external thread 1.5a on the first fixing ring 1.5. Meanwhile, a left locking spring 1.8, a right locking spring 1.8 ', a left bolt 1.9, a right bolt 1.9', a left fixing nut 1.10 and a right fixing nut 1.10 'are respectively arranged in a left mounting hole 2.8a and a right mounting hole 2.8 a' of the cylinder barrel II 2.8, and a left bolt and a right bolt 1.9 a 'are respectively arranged in a right mounting hole 2.8a and a left mounting hole 2.8 a', and a right fixing nut 1.10 'are respectively in threaded connection with the left mounting hole inner thread 2.8b and the right mounting hole 2.8 b' of the cylinder barrel II; the top ends of the left bolt 1.9 and the right bolt 1.9' which are installed penetrate through a locking hole 2.10b of the second fixing ring and then are just positioned in a guide groove 2.6c of the second driving rod, and a first sealing ring 1.12 and a second sealing ring 1.13 are arranged between the second cylinder barrel 2.8 and the second driving rod 2.6; the support 1.1 and the trunnion mounting hole 1.4a of the trunnion 1.4 are connected through the mounting pin shaft 1.2, and left and right shaft end baffles 1.3 and 1.3' are arranged at the left end and the right end of the mounting pin shaft 1.2, so that the mounting pin shaft 1.2 is prevented from axially moving. The trunnion external thread 1.4b of the trunnion 1.4 is connected with the cylinder barrel two-end internal thread 2.8d of the cylinder barrel two 2.8.

The buffer cylinder inner thread 2.9a of the buffer cylinder 2.9 is in threaded connection with the connecting thread 2.1c of the extension mechanism support 2.1, the buffer rod 2.12 is provided with the buffer spring 2.11 and then is installed inside the buffer cylinder 2.9, and the buffer spring 2.11 is prevented from moving towards the buffer cylinder inner thread 2.9a direction of the buffer cylinder 2.9 after the fixed ring outer thread 2.10a on the fixed ring II 2.10 is in threaded connection with the buffer cylinder inner thread 2.9a of the buffer cylinder 2.9. A third sealing ring 2.13 and a fourth sealing ring 2.14 are arranged between the buffer cylinder barrel 2.9 and the buffer rod 2.12, a buffer rod connecting end 2.12a of the buffer rod 2.12 is connected with a foot pad 2.15 through a foot pad pin shaft 2.16, and left and right foot pad pin shaft end baffles 2.17 and 2.17' are arranged at the left and right ends of the foot pad pin shaft 2.16 to prevent the foot pad pin shaft 2.16 from axially moving.

As shown in fig. 23, a trunnion mounting hole 1.4a and a trunnion external thread 1.4b are provided on the trunnion 1.4;

as shown in fig. 24, the first fixing ring 1.5 is provided with a first fixing ring external thread 1.5a, a first fixing ring locking hole 1.5b and a first fixing ring operating hole 1.5c, and the first fixing ring external thread 1.5a of the first fixing ring 1.5 and the first cylinder internal thread 1.7e of the first cylinder 1.7 can be screwed and unscrewed through the first fixing ring operating hole 1.5 c.

As shown in fig. 25, the left end and the right end of the cylinder barrel 1.7 are respectively provided with a left mounting hole 1.7a and a right mounting hole 1.7a 'and a right mounting hole 1.7b and 1.7 b' of the cylinder barrel, a medium port 1.7c of the cylinder barrel, an internal thread 1.7d at one end of the cylinder barrel and an internal thread 1.7e of the cylinder barrel;

as shown in fig. 26, one end of the driving rod one 1.11 is provided with a connecting end 1.11a, the other end is provided with a driving rod one locking hole 1.11b, a driving rod one guide groove 1.11c communicated with the driving rod one locking hole 1.11b and a driving rod one sealing ring mounting ring 1.11 d;

as shown in fig. 27, the opening mechanism bracket 1.15 is provided with a driving hole 1.15a and a driven hole 1.15 b;

as shown in fig. 28, the expanding mechanism bracket 2.1 is provided with a hinge hole 2.1a, a driving hole 2.1b, a connecting thread 2.1c and a long hole 2.1 d;

as shown in fig. 29, one end of the second driving rod 2.6 is provided with a connecting end 2.6a, the other end is provided with a second driving rod locking hole 2.6b, a second driving rod guiding groove 2.6c communicated with the second driving rod locking hole 2.6b, and a second driving rod sealing ring mounting ring 2.6 d;

as shown in fig. 30, the left end and the right end of the second cylinder barrel 2.8 are respectively provided with a second cylinder barrel left mounting hole 2.8a, a second cylinder barrel right mounting hole 2.8a ', a second cylinder barrel left mounting hole inner thread 2.8b, a second cylinder barrel right mounting hole inner thread 2.8 b', a second cylinder barrel medium port 2.8c, a second cylinder barrel end part inner thread 2.8d and a second cylinder barrel inner thread 2.8 e;

as shown in fig. 31, the buffer cylinder 2.9 is provided with the buffer cylinder internal thread 2.9a and the buffer cylinder medium port 2.9 b;

as shown in fig. 32, the second fixing ring 2.10 is provided with a second fixing ring external thread 2.10a, a second fixing ring locking hole 2.10b and a second fixing ring operating hole 2.10c, and the second fixing ring external thread 2.10a of the second fixing ring 2.10 and the second cylinder barrel internal thread 2.8e of the second cylinder barrel 2.8 can be screwed and loosened through the second fixing ring operating hole 2.10 c;

as shown in fig. 33, the buffer rod 2.12 is provided with a buffer rod connection end 2.12a and a seal ring mounting ring 2.12 b.

The folding working process of the invention is as follows:

as shown in fig. 6 and 7, a high-pressure medium is input into a closed space 1A formed by a first medium port 1.7c of the cylinder barrel to the first cylinder barrel 1.7, a first driving rod 1.11, a first sealing ring 1.12 and a second sealing ring 1.13, under the action of the high-pressure medium, the first driving rod 1.11 pushes an opening mechanism spring 1.6 to approach a first fixing ring 1.5, and the first medium port 1.7c of the cylinder barrel is blocked after the extending length of the first driving rod 1.11 reaches the required length; the folded state is shown in fig. 4 and 5.

As shown in fig. 15, a high-pressure medium is input into a closed space 1B formed by the second cylinder barrel medium port 2.8c, the second driving rod 2.6, the first sealing ring 1.12 and the second sealing ring 1.13, under the action of the high-pressure medium, the second driving rod 2.6 pushes the expansion mechanism spring 2.7 to approach the first fixing ring 1.5, and the second cylinder barrel medium port 2.8c is blocked after the extension length of the second driving rod 2.6 reaches the required length; the collapsed state is shown in fig. 13 and 14.

As shown in fig. 16, a high-pressure medium is input into a closed space 1C formed by the buffer cylinder medium port 2.9b, the buffer rod 2.12, the seal ring three 2.13 and the seal ring four 2.14, under the action of the high-pressure medium, the buffer rod 2.12 pushes the buffer spring 2.11 to approach the fixed ring two 2.10, and the buffer cylinder medium port 2.9b is blocked after the extension length of the buffer rod 2.12 reaches the required requirement; the collapsed state is shown in fig. 13 and 14.

When the rocket is about to land, the landing support mechanism of the foldable large-span multi-buffer carrier rocket capable of being repeatedly used needs to be unfolded, and the working process is as follows:

the blocked cylinder barrel one medium port 1.7c is opened in a fire attack mode, and the opening mechanism spring 1.6 pushes the driving rod one 1.11 to move towards the cylinder barrel one medium port 1.7 c; meanwhile, as shown in fig. 6, because the top ends of the left and right plugs 1.9, 1.9' are right located in the first driving rod guide slot 1.11c after being installed, and the end of the first driving rod 1.11, which is provided with the first driving rod guide slot 1.11c, is provided with a first driving rod locking hole 1.11b communicated with the first driving rod guide slot 1.11c, when the first driving rod 1.11 moves towards the first cylinder media port 1.7c under the pushing of the opening mechanism spring 1.6, under the action of the left and right locking springs 1.8, 1.8 ', the end portions of the left and right plugs 1.9, 1.9' pass through the first locking hole 1.5b of the fixing ring and then are inserted into the first driving rod locking hole 1.11b, as shown in fig. 10;

the blocked second cylinder barrel medium port 2.8c is opened in a fire attack mode, and the expansion mechanism spring 2.7 pushes the second driving rod 2.6 to move towards the second cylinder barrel medium port 2.8 c; meanwhile, as shown in fig. 17, because the top ends of the left and right plugs 1.9, 1.9' are right located in the second driving rod guide slot 2.6c after being installed, and the end of the second driving rod 2.6, which is provided with the second driving rod guide slot 2.6c, is provided with the second driving rod locking hole 2.6b communicated with the second driving rod guide slot 2.6c, when the second driving rod 2.6 moves towards the second cylinder barrel media port 2.8c under the pushing of the expanding mechanism spring 2.7, under the action of the left and right locking springs 1.8, 1.8 ', the end portions of the left and right plugs 1.9, 1.9' pass through the second fixing ring locking holes 2.10b and then are inserted into the second driving rod locking holes 2.6b, as shown in fig. 22;

1) as shown in fig. 21, the blocked damping cylinder medium port 2.9b is opened by a fire attack, and the damping spring 2.11 pushes the damping rod 2.12 to move towards the damping cylinder medium port 2.9 b.

And after the three steps of work are finished, the unfolding action is finished.

Although only the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and all changes are encompassed in the scope of the present invention.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.

Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.