CN115071982A - A multi-stage deployable parachute device based on task sequence - Google Patents

Abstract

The invention provides a multi-stage deployable deceleration parachute device based on task sequence, which comprises a mounting frame, an umbrella-shaped unfolding mechanism and a limiting mechanism, and the mounting frame includes a middle strut and a connecting seat arranged on the middle strut; the umbrella The 3R1P unfolding mechanism includes a plurality of 3R1P unfolding units distributed in an umbrella shape. The 3R1P unfolding unit includes a sliding seat, an umbrella rib rod and a support rod. The two ends of the support rod are respectively hinged on the sliding seat and the umbrella rib rod, and the sliding seats in the two or more umbrella-shaped unfolding mechanisms are arranged in sequence along the middle support rod; the limiting mechanism includes a rotating pin, a limiting swing arm and a The elastic piece is provided with a hollow slot in the middle strut, and the limit swing arm is hidden in the hollow slot through a rotating pin and compresses the elastic piece. The invention adopts the multi-stage design to cope with the deceleration conditions required by different tasks, and at the same time adopts the truss-type deployable mechanism, which can effectively avoid the jamming phenomenon of the deceleration umbrella bag when it is opened.

Description

A multi-stage deployable parachute device based on task sequence

technical field

The invention relates to a multi-stage deployable deceleration parachute device based on task sequence.

Background technique

The parachute is a deployable aerodynamic reducer that uses the principle of air resistance and relies on inflatable and unfolded relative to the air movement. A modern parachute makes people or objects fall safely from the air to the ground. It is mainly made of flexible fabrics. It is the equipment and equipment for the combat and training of airborne troops, the lifesaving and training of aerospace personnel, the training, competition and performance of skydivers, airdrops, and recovery of aircraft.

The main components of the traditional parachute are umbrella canopy, guide umbrella, umbrella rope, harness system, umbrella opening parts and umbrella bag. It is composed of deceleration umbrella silk (made of silk, cotton cloth, and now nylon fabric in the early days), umbrella rope, umbrella belt and umbrella thread and other textile materials, as well as some metal parts and rubber plastic parts; the umbrella rope is woven with hollow or core. The rope requires compact structure, high strength, softness, good elasticity, and small elongation unevenness. The umbrella belt is used as the reinforcement belt and harness system of the umbrella. The umbrella rope is the skeleton of the umbrella. It has higher elastic modulus and is smaller than the elongation at break of the umbrella fabric; the umbrella belt adopts a thick belt of double or triple fabric, which requires high strength. Umbrella thread is a connecting material for sewing parachute silk, belt and rope, and requires high strength, good lubrication and even and stable twist. This type of parachute has poor stability during deployment, is easy to get stuck, and is prone to entanglement between the ropes and nets. It has the characteristics of one-time deployment, and the impact load is large, which has a certain impact on the aircraft body, and can only be used for deceleration from altitude to zero. process, it has no practical value for aircraft with deceleration task timing requirements.

Most of the existing deceleration parachute bags used in high-speed aircraft are self-adaptively deployed by direct throwing. The umbrella bag of the entire deceleration parachute is made of flexible materials, which are characterized by light weight and easy storage, but this deployment method has poor reliability. , it often happens that the deceleration parachute bag cannot be opened, and at the same time, the ropes are easily entangled to form the unfolded shape, which brings great hidden danger to the flight safety of the aircraft. In addition, the current deceleration parachute bag opening happens almost instantaneously, this way will cause a rapid rise of air resistance, and the instantaneous increase of air resistance from zero to a very large state will cause great shock load, which will cause high speed The violent vibration of the aircraft can even damage the aircraft itself.

Therefore, there is a need for improvements to the prior art.

SUMMARY OF THE INVENTION

In view of the defects of the prior art, the present invention provides a multi-stage deployable deceleration parachute device based on task sequence, which adopts multi-stage design to cope with deceleration conditions required by different tasks, and adopts a truss-type deployable mechanism, which can effectively It avoids the jamming phenomenon of the parachute bag when it is opened.

In order to achieve the above object, the present invention provides a multi-stage deployable parachute device based on task sequence, which includes:

Mount;

two or more umbrella deployment mechanisms;

limit mechanism;

The installation frame includes an intermediate strut and a connecting seat arranged on the intermediate strut;

The umbrella-shaped unfolding mechanism includes a plurality of 3R1P unfolding units distributed in an umbrella shape with the middle strut as the center. The 3R1P unfolding unit includes a sliding seat, an umbrella rib and a supporting rod. The sliding seat is slidably arranged on the middle strut. One end is hinged on the connecting seat, and the two ends of the support rod are hinged on the sliding seat and the rib rod respectively;

The sliding seats in two or more umbrella-shaped deployment mechanisms are sequentially arranged along the middle strut;

The limit mechanism includes a rotation pin, a limit swing arm and an elastic piece. The middle strut is provided with a hollow slot, and the limit swing arm is hidden in the hollow slot and compresses the elastic piece through the pivot pin. The rotation center is perpendicular to the center line of the intermediate strut, and the limit swing arm is arranged on the sliding path of the sliding seat to limit the unfolding of the umbrella-shaped unfolding mechanism.

According to another specific embodiment of the present invention, it further includes a trigger mechanism for performing the coupling action of the sliding seats in two adjacent umbrella-shaped deployment mechanisms, the trigger mechanism includes a follow-up link and a trigger mechanism disposed on the follow-up link The trigger block, the number of umbrella-shaped deployment mechanisms is three or more, the follow-up link is connected with the sliding seat in the front umbrella-shaped deployment mechanism, and the trigger block is located at the sliding seat in the rear umbrella-shaped deployment mechanism. At the rear of the seat, the slider in the front umbrella deployment mechanism can abut against the slider in the rear umbrella deployment mechanism before sliding to the limit position.

According to another specific embodiment of the present invention, the intermediate strut is provided with a chute arranged along its length direction, the follow-up link is arranged in the chute, and the trigger block extends to the outside of the chute.

According to another specific embodiment of the present invention, the number of trigger blocks is two or more.

According to another specific embodiment of the present invention, the elastic member is a torsion spring, and the limit swing arm always compresses the torsion spring in the process of swinging into the avoidance groove.

According to another specific embodiment of the present invention, the number of limit swing arms is two or more.

According to another specific embodiment of the present invention, one end of the umbrella rib rods in different umbrella-shaped unfolding mechanisms is hinged on the connecting seat in the form of a staggered and uniform arrangement.

According to another specific embodiment of the present invention, the lengths of the rib rods and the lengths of the support rods in the rear umbrella-shaped deployment mechanism are successively increased to have different deployment dimensions.

According to another specific embodiment of the present invention, an umbrella bag wrapped around the outside of the umbrella-shaped unfolding mechanism is further included.

The present invention has the following beneficial effects:

In the present invention, the umbrella-shaped deployment mechanism adopts a truss structure to replace the self-adaptive deployment of the deceleration parachute bag, which improves the fault tolerance space of the traditional deceleration parachute bag, and can effectively avoid the jamming phenomenon of the deceleration parachute bag when it is opened.

In the present invention, multiple umbrella-shaped deployment mechanisms adopt multi-level design, which can form umbrella-shaped structures of different scales and can cope with deceleration conditions required by different tasks, thereby ensuring the speed adjustment capability of the aircraft.

In the present invention, the limit mechanism adopts a special limit mechanism, which ensures the single degree of freedom characteristic of the entire deceleration umbrella, and this single degree of freedom can be driven by a simple driving method such as a spring, which further increases the movement of the mechanism. reliability.

In the present invention, the trigger mechanism is designed for the motion coupling of different levels of slides (drive joints), so as to realize the controllability of the coupling time and form the motion effect with time sequence characteristics, which is of great significance to the multi-level deceleration of the aircraft. .

The present invention will be further described in detail below in conjunction with the accompanying drawings.

Description of drawings

1 is a schematic diagram of the folded state of the multi-stage deployable deceleration parachute device according to Embodiment 1 of the present invention;

Fig. 2 is the schematic diagram of the expanded state of the multi-stage deployable deceleration parachute device according to Embodiment 1 of the present invention;

3 is a schematic structural diagram of an umbrella-shaped deployment mechanism in Embodiment 1 of the present invention;

4 is a schematic structural diagram of a first-stage umbrella-shaped deployment mechanism in Embodiment 1 of the present invention;

5 is a schematic structural diagram of a second-stage umbrella-shaped deployment mechanism in Embodiment 1 of the present invention;

6 is a schematic structural diagram of a third-stage umbrella-shaped deployment mechanism in Embodiment 1 of the present invention;

7 is a schematic diagram of a limiting mechanism in Embodiment 1 of the present invention;

8 is a schematic diagram of a trigger mechanism in Embodiment 1 of the present invention;

FIG. 9 is a schematic diagram of the deployment process of the multi-stage deployable parachute device in Embodiment 1 of the present invention.

Detailed ways

In order to understand the above objects, features and advantages of the present invention more clearly, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments may be combined with each other in the case of no conflict.

Many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific details disclosed below. Example limitations.

Example 1

This embodiment provides a multi-stage deployable deceleration parachute device based on task sequence, as shown in FIGS. 1-2 , which includes a mounting frame 100 , two or more umbrella-shaped deployment mechanisms 200 , and a limiting mechanism 300 and trigger mechanism 400.

The mounting frame 100 includes an intermediate strut 110 and a connecting seat 120 disposed on the intermediate strut 110;

In this embodiment, the three-level deceleration formed by three umbrella-shaped deployment mechanisms 200 is used as an example for introduction. As shown in FIG. 3 , specifically, the umbrella-shaped deployment mechanisms 200 are a first-level umbrella-shaped deployment mechanism A stage umbrella deployment mechanism 200b and a third stage umbrella deployment mechanism 200c.

As shown in FIG. 4 , the first-stage umbrella-shaped unfolding mechanism 200 a includes a plurality of first-stage 3R1P unfolding units 210 distributed in an umbrella-like shape with the middle strut 110 as the center, and the first-stage 3R1P unfolding unit 210 includes a first sliding seat 211 , the first rib rod 212 and the first support rod 213, the first sliding seat 211 is slidably arranged on the intermediate rod 110 to form a moving pair P1, and one end of the first rib rod 212 is hinged on the connecting seat 120 to form a rotation In the pair R1, the two ends of the first support rod 213 are respectively hinged on the first sliding seat 211 and the first rib rod 212 to form a rotating pair R2 and a rotating pair R3.

As shown in FIG. 5 , the second-stage umbrella-shaped unfolding mechanism 200 b includes a plurality of second-stage 3R1P unfolding units 220 distributed in an umbrella-like shape with the middle strut 110 as the center, and the second-stage 3R1P unfolding unit 220 includes a second sliding seat 221 , the second rib rod 222 and the second support rod 223, the second sliding seat 221 is slidably arranged on the intermediate rod 110 to form a moving pair P2, and one end of the second rib rod 222 is hinged on the connecting seat 120 to form a rotation In the pair R4, both ends of the second support rod 223 are hinged on the second sliding seat 221 and the second rib rod 222, respectively, to form a rotating pair R5 and a rotating pair R6.

As shown in FIG. 4 , the third-stage umbrella-shaped unfolding mechanism 200 c includes a plurality of third-stage 3R1P unfolding units 230 distributed in an umbrella-like shape with the middle strut 110 as the center, and the third-stage 3R1P unfolding unit 230 includes a third sliding seat 231 , the third rib rod 232 and the third support rod 233, the third sliding seat 231 is slidably arranged on the middle rod 110 to form a moving pair P2, and one end of the third rib rod 232 is hinged on the connecting seat 120 to form a rotation In the pair R7, both ends of the third support rod 233 are hinged on the third sliding seat 231 and the third rib rod 232, respectively, to form a rotating pair R8 and a rotating pair R9.

Wherein, the first sliding seat 211, the second sliding seat 221 and the third sliding seat 231 are arranged in sequence along the middle strut 110, and the length of the first rib rod 212, the length of the second rib rod 222, the length of the third rib The lengths of the rods 232 increase successively, and the lengths of the first support rod 213 , the length of the second support rod 223 , and the length of the third support rod 233 also increase successively to have different deployment dimensions.

Specifically, as shown in FIG. 3 , one end of the first rib rod 212, one end of the second rib rod 222, and one end of the third rib rod 232 are hinged on the connecting seat 120 in a staggered and evenly arranged form. In the embodiment, the connecting seat 120 is provided with 24 hinge points for hinged connection with different umbrella rib rods, and the 24 hinge points are located on the same circumference with the middle strut 110 as the center. 8 3R1P expansion units.

As shown in FIG. 7 , the limiting mechanism 300 includes a rotating pin 310 , a limiting swing arm 320 and an elastic member (not shown in the figure), the middle strut 110 is provided with an escape groove 111 , and the limiting swing arm 320 passes through the rotating pin 310 can be swung in and hidden in the recess 111 and compress the elastic member, wherein the rotation center of the rotating pin 310 is perpendicular to the center line of the middle strut 110, and the limit swing arm 320 is arranged on the sliding path of its corresponding sliding seat To limit the deployment of the umbrella-shaped deployment mechanism 200 .

Specifically, the elastic member is a torsion spring, and the limit swing arm 320 always compresses the torsion spring in the process of swinging into the hollow groove 111 , wherein the number of limit swing arms 320 is two.

Under the action of the elastic member, the limiting swing arm 320 is located outside the recess 111 without external force (ie, in the unfolding position) to limit the unfolding of the umbrella-shaped unfolding mechanism 200, and only a small force is required at this time. Lock the corresponding sliding seat so that it does not move, and when the corresponding sliding seat (such as the second sliding seat 221, the third sliding seat 231) starts to move under the action of air resistance, the torsion spring is increased in force and rotates and is hidden in the In the avoidance groove 111 , the corresponding sliding seat can successfully move over the limiting mechanism 300 at this time.

As shown in FIG. 8 , the trigger mechanism 400 is used to perform the coupling action of the sliders in the adjacent two umbrella-shaped deployment mechanisms 200 , and the trigger mechanism 400 includes a follow-up link 410 and a trigger block arranged on the follow-up link 410 420. Preferably, the number of trigger blocks 420 is two.

It should be pointed out that when the number of umbrella-shaped deployment mechanisms 200 is three or more, the trigger mechanism 400 needs to be triggered to realize the task timing characteristics of multiple umbrella-shaped deployment mechanisms 200. If there are only two umbrella-shaped deployment mechanisms 200 , the sequential deployment of the two-stage umbrella deployment mechanism 200 can be realized based on the existence of the limiting mechanism 300 .

In this embodiment, the first-stage umbrella-shaped deployment mechanism 200a is taken as the front, and the second-level umbrella-shaped deployment mechanism 200b is deployed as the rear to introduce the specific structure of the trigger mechanism 400:

The follower link 410 is connected with the first sliding seat 211, the triggering block 420 is located behind the second sliding seat 221, the first sliding seat 211 can abut against the second sliding seat 221 before sliding to the limit position, and the triggering block 420 A sliding coupling force is started to be provided to the second sliding seat 221; before this, the movements of the first sliding seat 211 and the second sliding seat 221 are decoupled from each other.

The intermediate strut 110 is provided with a chute 112 along its length direction, the follower link 410 is arranged in the chute 112 , and the trigger block 420 extends to the outside of the chute 112 .

Further, in order to avoid the interference phenomenon, the follower link 410 is also set to be partially hollow, as long as the relative sliding between the multiple components can be achieved, which will not be described here.

In terms of deployment, as shown in FIG. 9 , since the subsequent umbrella-shaped deployment mechanisms 200 are provided with the limiting mechanisms 300 , in the initial stage of the overall deployment, the limitless mechanism 300 at the first-stage umbrella-shaped deployment mechanism 200a opens and unfolds first. When the first sliding seat 211 moves to the end of its stroke, the trigger block 420 connected with the first sliding seat 211 is coupled with the second sliding seat 221, and the first-stage umbrella-shaped deployment mechanism 200a is about to move At the end point, under the coupling action of the trigger block 420 and the action of air resistance, the second-stage umbrella-like unfolding mechanism 200b begins to unfold gradually; when the second sliding seat 221 moves to the end of its stroke, the The triggering block 420 is coupled with the third sliding seat 231 , and the second-stage umbrella-shaped deployment mechanism 200b is about to reach the end of its movement, and the third-stage umbrella-shaped deployment mechanism 200c starts to be gradually deployed until it is fully deployed.

Specifically, the multi-stage deployable deceleration parachute device in this embodiment is provided with an umbrella bag 500 wrapped outside the umbrella-shaped deployment mechanism 200. When the third-stage umbrella-shaped deployment mechanism 200c is fully deployed, the area of the umbrella bag 500 gradually increases. Increase to the maximum value, the air resistance at this time is the maximum value, and the aircraft obtains the maximum deceleration provided by the multi-stage parachute until the aircraft stops moving.

In this embodiment, the process of deploying the multi-stage parachute in time sequence can be applied to aircrafts of different sizes. If the flying speed of the aircraft is not high and its mass is small, it may not be necessary to deploy all the multi-stage parachutes. One-level deployment is also sufficient to complete the mission requirements. If the aircraft has a high flight speed and a large mass, a multi-stage parachute can also meet different deceleration needs. The entire deceleration process is divided into multiple levels, which can provide increased flight resistance. Multiple steps, which help to avoid excessive shock loads to protect the aircraft itself.

Although the present invention is disclosed above with preferred embodiments, it is not intended to limit the scope of implementation of the present invention. Any person of ordinary skill in the art can make some improvements without departing from the scope of the present invention, that is, all equivalent improvements made according to the present invention should be covered by the scope of the present invention.

Claims (9)

1. a multi-stage deployable deceleration parachute device based on task sequence, is characterized in that, comprises: Mount; two or more umbrella deployment mechanisms; limit mechanism; The mounting frame includes an intermediate strut and a connecting seat arranged on the intermediate strut; The umbrella-shaped unfolding mechanism includes a plurality of 3R1P unfolding units distributed in an umbrella shape with the middle strut as the center. The 3R1P unfolding unit includes a sliding seat, an umbrella rib rod and a supporting rod, and the sliding seat is slidably arranged at the place. On the intermediate support rod, one end of the rib rod is hinged on the connecting seat, and both ends of the support rod are hinged on the sliding seat and the rib rod respectively; The sliding seats in two or more of the umbrella-shaped unfolding mechanisms are sequentially arranged along the middle strut; The limit mechanism includes a rotation pin, a limit swing arm and an elastic piece, the intermediate strut is provided with a hollow slot, and the limit swing arm can be swung in and hidden in the hollow slot through the pivot pin inside and compress the elastic member, wherein the rotation center of the rotating pin is perpendicular to the center line of the intermediate strut, and the limiting swing arm is arranged on the sliding path of the sliding seat to limit the umbrella-shaped Expand the expansion of the organization. 2 . The multi-stage deployable deceleration parachute device based on task sequence according to claim 1 , further comprising a trigger mechanism for performing a coupling action between the sliding seats in two adjacent umbrella-shaped deployment mechanisms. 3 . , the trigger mechanism includes a follower link and a trigger block arranged on the follower link, the number of the umbrella-shaped deployment mechanism is three or more, and the follower link is the same as the previous one. The sliding seat in the umbrella-shaped deployment mechanism is connected, the trigger block is located at the rear of the sliding seat in the rear umbrella-shaped deployment mechanism, and all the front umbrella-shaped deployment mechanisms are located. The sliding seat can abut against the sliding seat in the rear umbrella-shaped deployment mechanism before sliding to a limit position. 3. The multi-stage deployable deceleration parachute device based on task sequence according to claim 2, wherein the intermediate strut is provided with a chute arranged along its length direction, and the follow-up link is arranged on the In the chute, the trigger block protrudes to the outside of the chute. 4 . The multi-stage deployable parachute device based on the task sequence of claim 3 , wherein the number of the trigger blocks is two or more. 5 . 5 . The multi-stage deployable deceleration parachute device based on task sequence according to claim 1 , wherein the elastic member is a torsion spring, and the limit swing arm is in the process of swinging into the air escape groove. 6 . Always compress the torsion spring. 6 . The multi-stage deployable parachute device based on the task sequence of claim 5 , wherein the number of the limit swing arms is two or more. 7 . 7 . The multi-stage deployable deceleration parachute device based on task sequence according to claim 1 , wherein one end of the umbrella rib rod in the different umbrella-shaped deployment mechanisms is hinged in the form of a staggered and uniform arrangement. 8 . on the connector. 8 . The multi-stage deployable deceleration parachute device based on task sequence according to claim 1 , wherein the length of the rib rod and the length of the support rod in the latter umbrella-shaped deployment mechanism are: 9 . Incrementally increases to have different unrolled dimensions. 9 . The multi-stage deployable deceleration parachute device based on the task sequence of claim 1 , further comprising an umbrella bag wrapped outside the umbrella-shaped deployment mechanism. 10 .

Images