Limiting device for controlling size of closing opening of parachute

Abstract

The limiting device comprises a canopy bottom edge, a limiting structure, a parachute cord and closing-in sliding cloth, a center hole is formed in the center of the limiting structure, one end of the parachute cord penetrating through the center hole in the limiting structure is connected with the canopy bottom edge, and the other end of the parachute cord is connected with the closing-in sliding cloth. And the limiting structure slides along the parachute cord between the bottom edge of the parachute canopy and the closing-up sliding cloth. A movable limiting structure is arranged on a parachute cord, the adverse working condition that the closing-up sliding cloth cannot work normally due to the fact that eyelets on the closing-up sliding cloth are clamped on a parachute canopy radiation reinforcing band and a parachute cord connecting joint is overcome, and meanwhile according to different tasks, the position of the limiting device on the parachute cord is moved in the lifesaving parachute packaging stage. The position of the closing-up sliding cloth on the parachute rope is positioned, the tightening degree of the closing-up sliding cloth on the bottom edge of a parachute canopy of the parachute is controlled, and then the parachute filling time is controlled.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of aviation lifesaving equipment, and relates to a limiting device for controlling the size of parachute closing. BACKGROUND

[0002] For the whole machine lifesaving system, the stability of the parachute directly affects the whole machine lifesaving condition, and good stability can make the whole machine land stably. Since the weight of the whole machine lifesaving system of the light aircraft is large, the vibration caused by the interaction between the parachute rope and the air at the parachute opening moment can affect the stability and control performance of the parachute. The closing slide cloth is used to balance the contradiction between the rapid filling at low speed and the load reduction at high speed of the parachute, and is the most core and key technology of the whole machine lifesaving system of the light aircraft. Whether the closing slide cloth can smoothly close the bottom edge of the canopy at the initial stage of parachute opening will determine whether the load reduction of the canopy is successfully completed, and whether the closing slide cloth can smoothly slide according to the program design during the inflation process of the canopy will also relate to whether the canopy can be rapidly filled. The bottom of the conventional parachute canopy is connected with the parachute rope through a radiation reinforcing belt, and a natural joint is formed, which can easily cause the eye ring on the closing slide cloth to be stuck at the joint, so that the closing slide cloth cannot work normally, and the parachute cannot be filled. Due to the existence of the closing slide cloth, the diameter of the bottom edge of the canopy is limited by the closing slide cloth at the low speed stage, so that the canopy cannot be rapidly and fully inflated.

[0003] In summary, the prior art has the technical problem of the unfavorable working condition that the eye ring on the closing slide cloth is stuck at the joint of the radiation reinforcing belt of the bottom of the parachute canopy and the parachute rope and cannot slide down. UTILITY MODEL CONTENTS

[0004] The utility model aims to provide a limiting device for controlling the size of parachute closing, which has a movable function for positioning the position of the closing slide cloth on the parachute rope, realizing the control of the closing ratio of the parachute, ensuring the falling time of the closing slide cloth under different tasks, and then controlling the inflation time of the canopy.

[0005] The utility model technical scheme is a limiting device for controlling the size of parachute closing, which comprises a canopy bottom edge, a limiting structure, a parachute rope and a closing slide cloth, the limiting structure is provided with a center hole in the center, one end of the parachute rope passing through the center hole on the limiting structure is connected with the canopy bottom edge, and the other end is connected with the closing slide cloth, so that the limiting structure slides along the parachute rope between the canopy bottom edge and the closing slide cloth.

[0006] In the above scheme, the closing slide cloth is provided with an eye ring, the length of the limiting structure is greater than the diameter of the eye ring, the eye ring is prevented from passing through the limiting structure, and the upward movement of the closing slide cloth is limited.

[0007] In the above scheme, the canopy bottom edge is provided with a radiation reinforcing belt, and the radiation reinforcing belt is sleeved with the parachute rope.

[0008] In the above scheme, the limiting structure is made of rubber material.

[0009] In the above scheme, the umbrella rope and the center hole on the limiting structure are in interference fit, so that the limiting structure can be fixed on the umbrella rope without external force and can be moved with external force.

[0010] In the above scheme, the number of eyelets arranged on the closing slide cloth is consistent with the number of umbrella ropes.

[0011] The device has the advantages and beneficial effects that: the limiting device arranged between the umbrella cloth bottom edge and the closing slide cloth can avoid the adverse working condition that the closing slide cloth moves up to the umbrella cloth bottom edge and is stuck, and improve the working reliability of the closing slide cloth; meanwhile, the device controls the position of the closing slide cloth on the umbrella rope, controls the closing ratio of the parachute under different conditions, and ensures the normal opening of the parachute under the low-altitude and low-speed working condition. The device has simple structure, can meet the needs of different parachute with slide cloth, has strong universality and high practicability. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is the whole parachute assembly structure schematic diagram of the utility model;

[0013] Figure 2 is the limiting structure schematic diagram of the utility model;

[0014] Figure 3 is the Figure 2 top view structure schematic diagram of the utility model;

[0015] Figure 4 is the limiting structure structure schematic diagram of the utility model at position one;

[0016] Figure 5 is the limiting structure structure schematic diagram of the utility model at position two

[0017] Figure 6 is the Figure 4 longitudinal sectional view of the utility model.

[0018] In the figure, 1 is the umbrella cloth bottom edge; 2 is the limiting structure; 2a is the center hole; 3 is the umbrella rope; 3a is position one; 3b is position two; 4 is the closing slide cloth; 4a is the eyelet; 5 is the radial reinforcing belt. DETAILED DESCRIPTION

[0019] The utility model will be further described in detail through specific embodiments:

[0020] Figure 1 is the whole diagram of the limiting structure 2 assembled on the parachute rope 3. Referring to Figure 2 and Figure 4 , the limiting structure 2 in Figure 2 is sleeved into the umbrella rope 3 in Figure 4 , and thenFigure 4 The umbrella rope 3 is sleeved with the bottom edge of the canopy, and the canopy, the limiting structure 2, the umbrella rope 3 and the closing slide cloth 4 are combined.

[0021] Referring to Figure 4 and Figure 5 When packing the parachute, the limiting structure 2 can be moved along the umbrella rope 3, for example, the limiting structure 2 can be moved from position one 3a to position two 3b, so as to limit the movement position of the closing slide cloth 4 along the umbrella rope 3 to realize the closing of the parachute. In some low-altitude and low-speed cases, the operation can reduce the closing time of the parachute, shorten the time of the slide cloth sliding down, and make the canopy fill faster.

[0022] The working principle of the utility model is as follows: a limiting structure 2 is arranged on the umbrella rope 3 of the parachute, the limiting structure 2 is arranged between the bottom edge 1 of the canopy and the closing slide cloth 4, when the closing slide cloth 4 moves upwards along the umbrella rope 3, the eyelet 4a on the closing slide cloth 4 cannot pass through the limiting structure 2, so that the closing slide cloth 4 is prevented from being clamped at the joint between the bottom edge of the canopy and the umbrella rope; when packing the parachute, the limiting structure 2 can be slid up and down along the umbrella rope 3 to position the slide cloth on the umbrella rope, when the position of the slide cloth is lower, the air inlet of the bottom edge of the canopy of the parachute is expanded, the inflow of air is increased, and the canopy is filled faster. The limiting structure 2 is made of rubber material, the high elasticity and viscoelasticity of the rubber material are used to absorb the energy of the interaction between the umbrella rope and the air flow, weaken the shaking phenomenon of the umbrella rope, and improve the stability and control performance of the parachute.

[0023] The above technical scheme is only a preferred embodiment of the application, and of course cannot limit the scope of the application, therefore, equivalent changes made according to the patent scope of the application still belong to the protection scope of the application.

Claims

1. A limiting device for controlling the size of a parachute closing, comprising a canopy bottom edge (1), a limiting structure (2), a canopy line (3) and a closing slide (4), characterized in that, The center of the limiting structure (2) is provided with a center hole (2a), the umbrella rope (3) is connected with the umbrella cloth bottom edge (1) at one end of the center hole (2a) on the limiting structure (2) and connected with the closing sliding cloth (4) at the other end, so that the limiting structure (2) slides along the umbrella rope (3) between the umbrella cloth bottom edge (1) and the closing sliding cloth (4).

2. The device according to claim 1, wherein, The closing sliding cloth (4) is provided with an eye ring (4a), the length of the limiting structure (2) is greater than the diameter of the eye ring (4a), so as to prevent the eye ring (4a) from passing through the limiting structure (2) and limit the upward movement of the closing sliding cloth (4).

3. The device of claim 2, wherein the device is configured to control the size of the parachute reefing. The umbrella cloth bottom edge (1) is provided with a radiation reinforcing belt (5), and the radiation reinforcing belt (5) is sleeved with the umbrella rope (3).

4. The device according to claim 3, wherein, The limiting structure (2) is made of rubber material.

5. A device for controlling the size of the opening of a parachute according to claim 4, characterized in that, The umbrella rope (3) and the center hole (2a) on the limiting structure (2) are in interference fit, so that the limiting structure (2) can be fixed on the umbrella rope (3) without external force and can be moved when there is external force.

6. The device of claim 1, wherein the device is configured to control the size of the parachute reefing. The number of the eye rings (4a) provided on the closing sliding cloth (4) is consistent with the number of the umbrella ropes (3).

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