Separable connecting structure and parachute

Abstract

The invention discloses a separable connecting structure and a parachute, and relates to the technical field of parachutes, the connecting structure comprises a connecting mechanism and a pre-tightening mechanism, the connecting mechanism comprises a first connecting piece and a second connecting piece, and the first connecting piece and the second connecting piece can be used for being connected with a parachute body and a load of the parachute correspondingly; the pre-tightening mechanism comprises a pre-tightening piece, a limiting piece and a cutting piece, the pre-tightening piece is connected with the limiting piece so that the two opposite sides of the limiting piece can be connected with the first connecting piece and the second connecting piece correspondingly, the cutting piece is connected with the pre-tightening piece and can cut off the pre-tightening piece under the action of external force so that the pre-tightening piece can be separated from the first connecting piece and the second connecting piece, and therefore the load is separated from the umbrella body. The load is not buffered by the parachute body any more, and the parachute can rapidly descend to a target landing point. By arranging the connecting structure, the load can be separated from the parachute body when the parachute stably lands for a certain time, so that the situation that the parachute body drives the load to deviate from a target landing point is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of parachutes, and in particular to a detachable connection structure and a parachute. Background Art

[0002] The parachute is mainly made of breathable flexible fabric and can be folded in a parachute bag or parachute cabin. When working, it is quickly inflated and fully expanded under the action of aerodynamic force, achieving the effect of rapid deceleration and stable landing, so that the dropped objects or people can land safely. At present, parachutes play a key role in the aerospace field. Their purpose is no longer limited to the degree of landing of objects, but more inclined to a rapid deceleration parachute, so that the connected dropped objects can quickly reach a predetermined speed, so as to continue the subsequent work steps. It has a wide range of applications, good deceleration effect, and lower cost than other methods.

[0003] The prior art with announcement number CN212448115U discloses a parachute that is easy to search and recover, including a canopy, parachute ropes, and dropped objects, and is characterized in that: each of the parachute ropes includes an upper combined parachute rope on the canopy that is combined with the canopy, and a lower suspension parachute rope connected to the lower end of the upper combined parachute rope; several of the upper combined parachute ropes are at least partially fixed with reflective material and the fixing method is sewing, and the lower suspension parachute ropes and the canopy sector are also sewn with reflective material. The method of sewing reflective material on the parachute ropes and the canopy locally facilitates the observation of the parachute landing status in the air, and the search for the parachute and dropped objects on the ground after landing.

[0004] However, the existing parachute still has defects, such as when the projectile reaches a stable landing speed, the parachute and the projectile cannot be separated. Under the effect of wind, the parachute will carry the projectile away from the target point, and the parachute at this time has a negative effect. Summary of the invention

[0005] The purpose of the present invention is to overcome the above technical deficiencies and to provide a detachable connection structure and a parachute to solve the technical problem in the prior art that after the object reaches a stable landing speed, the parachute cannot be separated from the object and the parachute brings negative effects.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a detachable connection structure, comprising: A connecting mechanism, comprising a first connecting member and a second connecting member; and The pre-tightening mechanism includes a pre-tightening member, a limiting member and a cutting member, wherein the limiting member includes two detachable first half shells and a second half shell, the pre-tightening member connects the first half shell and the second half shell so that the first half shell and the second half shell are clamped and connected with the first connecting member and the second connecting member, and the cutting member is connected to the pre-tightening member and can cut off the pre-tightening member under the action of an external force so that the first half shell, the second half shell are separated from the first connecting member and the second connecting member.

[0007] In some embodiments, the first half shell and the second half shell are combined to form an inner cavity, the first connecting member has a first chuck, the second connecting member has a second chuck, the first chuck is clamped to the top surface of the inner cavity, and the second chuck is clamped to the bottom surface of the inner cavity.

[0008] In some embodiments, the first connecting member further has a plurality of first balls, which are all located on the side of the first chuck facing away from the second connecting member and are arranged around the circumference of the first chuck, and the plurality of first balls simultaneously abut against the top surface of the inner cavity.

[0009] In some embodiments, the second connecting member further has a plurality of second balls, which are all located on the side of the second chuck facing away from the first connecting member and are arranged around the circumference of the second chuck, and the plurality of second balls simultaneously abut the bottom surface of the inner cavity.

[0010] In some embodiments, the pre-tightening member includes a pre-tightening rod, a first spring and a second spring, the two ends of the pre-tightening rod are respectively connected to the first half shell and the second half shell, the first spring and the second spring are respectively sleeved on both sides of the pre-tightening rod and both accumulate elastic force, and can drive the first half shell to separate from the second half shell when the pre-tightening rod is cut off.

[0011] In some embodiments, both the first half shell and the second half shell are provided with a clamping hole, and two clamping holes are penetrated at both ends of the pre-tightening rod. Both ends of the pre-tightening rod are L-shaped and respectively clamped with the two clamping holes to limit the separation of the first half shell and the second half shell.

[0012] In some embodiments, the preload member is disposed in the inner cavity and is located between the first chuck and the second chuck. The cutting member passes through the first connecting member and extends into the inner cavity to be sleeved on the middle part of the preload member. The cutting member can cut off the preload member under the action of external force.

[0013] In some embodiments, the limiting member further includes a positioning pin, and the first half shell and the second half shell are both provided with a positioning groove and are plugged in through the positioning pin.

[0014] In some embodiments, the first connector has two first connecting pins arranged at intervals, and the first connecting pins are used to connect the parachute rope and are connected to the parachute body through the parachute rope; the second connector has two second connecting pins arranged at intervals, and the second connecting pins are used to connect the sling and connect the load through the sling.

[0015] In a second aspect, the present invention further provides a parachute, comprising a parachute body, parachute ropes, a load, and a detachable connection structure as described in any one of claims 1 to 9, wherein one end of the parachute rope is connected to the parachute body, the other end of the parachute rope is connected to the first connecting piece and the cutting piece, the load is connected to the second connecting piece, and the parachute rope can drive the cutting piece to cut the preloaded piece when being straightened.

[0016] Compared with the prior art, the present invention provides a detachable connection structure, wherein the first connection member and the second connection member can be used to respectively connect the parachute body and the load, so that the parachute body can assist the load in landing safely when being buffered by the air. The parachute body is connected to the connection structure through an umbrella rope, and the umbrella rope is connected to the cutting member. When the umbrella rope is straightened, the umbrella rope can exert an external force on the cutting member, triggering the cutting member to enter a delay state. After the delay time, the cutting member cuts off the pre-tightening member to separate the first half shell from the second half shell, releases the connection between the first connection member and the second connection member, and the first connection member and the second connection member can be separated, so that the load is separated from the parachute body, and the load is no longer buffered by the parachute body, and can quickly land to the target landing point. By setting a connection structure, the present invention can separate the load from the parachute body when the parachute has been landing stably for a certain period of time, so as to prevent the parachute body from driving the load away from the target landing point. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a structural schematic diagram of a connection structure provided by an embodiment of the present invention; Figure 2 is a cross-sectional schematic diagram of a connection structure provided by an embodiment of the present invention; Figure 3 is a disassembly schematic diagram of a connection structure provided by an embodiment of the present invention; Figure 4 is a cross-sectional schematic diagram of a cutting piece provided by an embodiment of the present invention; Figure 5 It is a schematic diagram of the structure of a parachute provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] In order to solve the technical problem in the prior art that the parachute and the dropped object cannot be separated after the dropped object reaches a stable landing speed, which brings negative effects on the parachute, the present invention provides a detachable connection structure, which can drive the load and the parachute body to separate in time when the parachute landing tends to be stable, so as to avoid the parachute body driving the load to deviate from the target landing point.

[0020] It should be noted that the detachable connection structure described in the present invention is used for but not limited to parachutes, etc. For the convenience of explanation, in the present invention, only the detachable connection structure applied to a parachute is used as an example for explanation, and the principle of applying the detachable connection structure to other types of equipment is essentially the same as that applied to a parachute, and will not be described in detail here.

[0021] See also Figure 1 , Figure 1 The structural schematic diagram of a detachable connection structure 100 in an embodiment of the present invention is shown. The detachable connection structure 100 includes a connection mechanism 1 and a pre-tensioning mechanism 2. The connection mechanism 1 includes a first connection member 11 and a second connection member 12. The first connection member 11 is used to connect the parachute body through the parachute rope, and the second connection member 12 is used to connect the load. The first connection member 11 and the second connection member 12 are connected through the pre-tensioning mechanism 2, so that the parachute body is connected to the load, and the parachute body can assist the load to land safely when being buffered by air. The pre-tensioning mechanism 2 can start to perform the delayed separation work when the parachute rope is straightened. When it is executed for a certain time, the pre-tensioning mechanism 2 can disintegrate by itself, and the first connection member 11 and the second connection member 12 can be separated, so that the load is separated from the parachute body, which can prevent the parachute body from driving the load away from the target landing point.

[0022] The pre-tightening mechanism 2 includes a pre-tightening member 21, a limiting member 22 and a cutting member 23. The pre-tightening member 21 is connected to the limiting member 22 so that the opposite sides of the limiting member 22 are respectively connected to the first connecting member 11 and the second connecting member 12. The first connecting member 11 and the second connecting member 12 remain connected to assist the load to land safely. The cutting member 23 is connected to the pre-tightening member 21 and can cut off the pre-tightening member 21 under the action of an external force. Specifically, the cutting member 23 is connected to one or more parachute ropes. When the parachute ropes are straightened, the parachute ropes can apply external force to the cutting member 23, triggering the cutting member 23 to enter a delayed cutting state. After a preset time has passed, the cutting member 23 can cut off the pre-tightening member 21, so that the pre-tightening member 21 is separated from the first connecting member 11 and the second connecting member 12. The first connecting member 11 and the second connecting member 12 are released from restrictions and can be separated from each other, so that the load is separated from the parachute body.

[0023] In one embodiment, see Figure 2The limiting member 22 includes a first half shell 221 and a second half shell 222. The first half shell 221 and the second half shell 222 are connected by a pre-tightening member 21. The first half shell 221 is connected to the first connecting member 11, and the second half shell 222 is connected to the second connecting member 12, so that the first connecting member 11 is indirectly connected to the second connecting member 12. The pre-tightening member 21 connects the first half shell 221 and the second half shell 222 to prevent the first half shell 221 and the second half shell 222 from being separated in advance, causing the load to be separated from the parachute body. When it is necessary to separate the load from the parachute body, the cutting member 23 can be driven to cut off the pre-tightening member 21, the first half shell 221 and the second half shell 222 are separated and unlocked, the first connecting member 11 is separated from the second connecting member 12, and the load is separated from the parachute body.

[0024] In one embodiment, see Figure 2 , the first half shell 221 and the second half shell 22 are both semicircular and enclose an inner cavity 223, the first connector 11 has a first chuck 111, the second connector 12 has a second chuck 121, the first chuck 111 is clamped to the top surface of the inner cavity 223, and the second chuck 121 is clamped to the bottom surface of the inner cavity 223. In this embodiment, the first connector 11 and the second connector 12 are respectively clamped to the top surface and the top surface of the inner cavity 223 of the limiting member 22, so as to complete the indirect connection through the limiting member 22. The limiting member 22 of this embodiment is connected to the first connector 11 and the second connector 12 by internal clamping, which is not only stable but also convenient for subsequent unlocking. In other embodiments, the first connector 11 and the second connector 12 can also be connected to the outer surface of the limiting member 22, for example, they can be welded to the outer surfaces of the first half shell 221 and the second half shell 22 respectively by welding.

[0025] In one embodiment, see Figure 2 The first connecting member 11 also has a plurality of first balls 112, which are all located on the side of the first chuck 111 facing away from the second connecting member 12 and are arranged around the circumference of the first chuck 111, and the plurality of first balls 112 simultaneously abut against the top surface of the inner cavity 223. In this embodiment, the first connecting member 11 can be rotatably connected to the limit member 22 through the plurality of first balls 112, so that the first connecting member 11 can be rotated after the umbrella rope is connected, which is conducive to enhancing the flexibility of the movement of the umbrella rope, and the umbrella rope is not easy to be knotted during use. In addition, the contact area between the first ball 112 and the top surface of the inner cavity 223 is small, which can reduce friction and wear. Lubricating oil can also be applied to each first ball 112 to further enhance the flexibility of the movement of the umbrella rope and reduce the wear of parts.

[0026] In one embodiment, see Figure 2The second connecting member 12 also has a plurality of second balls 122, which are all located on the side of the second chuck 121 facing away from the first connecting member 11 and are arranged around the circumference of the second chuck 121. The plurality of second balls 122 simultaneously abut the bottom surface of the inner cavity 223. The second connecting member 12 of this embodiment has the same structure as the first connecting member 11 described above, and the method of connecting the stopper 22 is also the same, which will not be described in detail here. The second connecting member 12 can also be rotatably connected to the stopper 22 through the plurality of second balls 122, so that the suspension rope connected to the load can be flexibly rotated to avoid the suspension rope from getting tangled.

[0027] In one embodiment, see Figure 2 The preload member 21 includes a preload rod 211, a first spring 212 and a second spring 213. Figure 2 The two ends of the preload rod 211 of the illustrated embodiment are respectively connected to the first half shell 221 and the second half shell 222, and the first spring 212 and the second spring 213 are respectively sleeved on the two sides of the preload rod 211 and both accumulate elastic force. Since the two ends of the preload rod 211 lock the first half shell 221 and the second half shell 222, the first spring 212 and the second spring 213 cannot eject the first half shell 221 and the second half shell 222. When the preload rod 211 is cut off by the cutting member 23, the preload rod 211 releases the lock on the first half shell 221 and the second half shell 222, and the first spring 212 and the second spring 213 can simultaneously release the elastic force to drive the first half shell 221 and the second half shell 222 to separate, so that the first connecting member 11 and the second connecting member 12 are separated.

[0028] In one embodiment, see Figure 2 , the first half shell 221 and the second half shell 222 are both provided with a locking hole 224, and the two ends of the pre-tightening rod 211 are respectively penetrated through the locking holes 224 on the first half shell 221 and the second half shell 222 and bent and locked. Specifically, both ends of the pre-tightening rod 211 are L-shaped and the two locking holes 224 are respectively locked through the ends of the L-shaped to limit the separation of the first half shell 221 and the second half shell 222. In other embodiments, the two ends of the pre-tightening rod 211 can also lock the first half shell 221 and the second half shell 222 by other means, such as welding or threaded connection. When the middle part of the pre-tightening rod 211 is cut off by the cutting piece 23, the pre-tightening rod 211 no longer has a locking effect on the first half shell 221 and the second half shell 222.

[0029] In one embodiment, see Figure 2, the pre-tension rod 211 is arranged in the inner cavity 223 and is located between the first chuck 111 and the second chuck 121, the cutting member 23 penetrates the first connecting member 11 and extends into the inner cavity 223 and is sleeved on the middle part of the pre-tension rod 211, and the cutting member 23 can cut off the pre-tension rod 211 under the action of external force. In this embodiment, the first connecting member 11 has a through hole, one end of the cutting member 23 penetrates the through hole and is sleeved on the middle part of the pre-tension rod 211, and the other end of the cutting member 23 is used to connect the parachute rope and is connected to the parachute body through the parachute rope. When the parachute is released, before the parachute rope is straightened, the cutting member 23 will not apply tension to the pre-tension rod 211. When the parachute rope is straightened, the parachute rope applies tension to the cutting member 23, triggering the cutting member 23 to enter the delayed cutting state, and after a period of time, the cutting member 23 cuts off the pre-tension rod 211. The inner cavity 223 of this embodiment has reasonable space utilization, ingenious structure, basically no unnecessary space is wasted, compact structure, and small space occupation.

[0030] In one embodiment, see Figure 4 The cutting member 23 includes a cylinder 231, a pull ring 232, a driving spring 233, a firing pin 234, a triggering gunpowder 235, a pneumatic gunpowder 236, a delay body 237, a movable baffle 238 and a blade 239, wherein the bottom of the cylinder 231 has a through hole 80 for the preload rod 211 to pass through. An active cavity is provided in the cylinder 231, the outer wall of the delay body 237 is connected to the cavity wall of the active cavity, the head of the delay body 237 is provided with a triggering gunpowder 235, a driving chamber 240 is formed between the tail of the delay body 237 and the blade 239, and the pneumatic gunpowder 236 is located in the driving chamber 240. The pull ring 232 is used to connect the parachute's drawstring, one end of the driving spring 233 is connected to the firing pin 234, and the other end abuts the cylinder 231, and the pull ring 232 is connected to the firing pin 234 through a thin wire through the driving spring 233. When the parachute drives the pull rope to straighten under the action of air, the pull rope applies force to the pull ring 232, and the pull ring 232 pulls the firing pin 234 through the thin wire to compress the driving spring 233 to accumulate elastic force until the thin wire is broken, and the driving spring 233 releases the elastic force to drive the firing pin 234 to quickly hit the trigger gunpowder 235 in the delay body 237 to ignite the trigger gunpowder 235. After being ignited, the trigger gunpowder 235 can ignite the pneumatic gunpowder 236. Since the amount of pneumatic gunpowder 236 is large, it takes a certain amount of time for the pneumatic gunpowder 236 to burn to the drive chamber 240. When burning, the pneumatic gunpowder 236 in the drive chamber 240 can drive the movable baffle 238 to block the combustion channel of the delay body 237, so that the air pressure in the drive chamber 240 increases rapidly, so as to drive the blade 239 to slide quickly and cut off the preload rod 211.

[0031] Therefore, when the parachute rope is straightened, the blade 239 does not immediately cut the preload rod 211, but first triggers the cutting mechanism, and only when the pneumatic powder 236 burns to a certain extent will the blade 239 be driven to cut the preload rod 211. During the period of burning of the pneumatic powder 236, the parachute rope is always in a straightened state. The length of this buffer time can be adjusted by adjusting the content of the pneumatic powder 236 and the size of the delay body 237, which can be set through multiple tests.

[0032] In one embodiment, see Figure 2 The limiting member 22 further includes a positioning pin 225. The first half shell 221 and the second half shell 222 are both provided with a positioning groove 226 and are plugged in through the positioning pin 225. In this embodiment, during the installation of the first half shell 221 and the second half shell 222, the positioning pin 225 can be inserted into the positioning groove 226 of the first half shell 221 and the second half shell 222 for pre-fixation, and then the pre-tightening rod 211 can be used to connect and lock the first half shell 221 and the second half shell 222, so as to facilitate quick installation.

[0033] In one embodiment, see Figure 2 The first connecting member 11 also has a first connecting pin 113, which is used to connect the parachute rope and is connected to the parachute body through the parachute rope. The second connecting member 12 also has a second connecting pin 123, which is used to connect the suspension rope and is connected to the load through the suspension rope. In this embodiment, two first connecting pins 113 and two second connecting pins 123 are provided, and both are arranged at intervals. Both the two first connecting pins 113 can connect the parachute rope, and both the two second connecting pins 123 can connect the suspension rope, so that the connection is stable.

[0034] See also Figure 5 In a second aspect, the present invention further provides a parachute 200, comprising a parachute body 3, parachute ropes 4, a load 5 and the above-mentioned detachable connection structure 100, wherein the parachute ropes 4 have a plurality of ropes, two ends of a part of the parachute ropes 4 are respectively connected to the parachute body 3 and the first connecting member 11, and two ends of another part of the parachute ropes 4 are respectively connected to the cutting member 23 and the parachute body 3, and the load 5 is connected to the second connecting member 12 through the suspension rope 6, and all the parachute ropes 4 can trigger the cutting member 23 when straightened, and the cutting member 23 enters a delayed state. After a short period of time, the cutting member 23 cuts off the pre-tightening rod 211, and the first connecting member 11 is separated from the second connecting member 12, and the load 5 is no longer affected by the parachute body 3 and will not be deviated by the parachute body 3.

[0035] In order to better understand the present invention, the following Figures 1 to 5 The technical solution of the present invention is described in detail: The first connecting member 11 and the second connecting member 12 of the detachable connecting structure 100 provided by the present invention can be used to respectively connect the parachute body 3 and the load 5 of the parachute, so that the parachute body 3 can assist the load 5 to land safely when being buffered by the air. During the release process of the parachute 200, the parachute rope 4 is gradually straightened under the action of the airflow and the load. When the parachute rope 4 is straightened, the parachute rope 4 can exert an external force on the cutting member 23, triggering the cutting member 23 to enter the delay state. After the delay waiting time, the cutting member 23 cuts off the preload rod 211. Under the elastic action of the first spring 212 and the second spring 213, the first half shell 221 is separated from the second half shell 222, and the limiting member 22 releases the connection limit of the first connecting member 11 and the second connecting member 12. The first connecting member 11 and the second connecting member 12 are separated, so that the load 5 is separated from the parachute body 3, and the load 5 is no longer buffered by the parachute body 3, and can quickly land to the target landing point to avoid the parachute body 3 driving the load to deviate from the target landing point.

[0036] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A detachable connection structure, characterized in that: include: A connecting mechanism, comprising a first connecting member and a second connecting member; and The pre-tightening mechanism includes a pre-tightening member, a limiting member and a cutting member, wherein the limiting member includes two detachable first half shells and a second half shell, the pre-tightening member connects the first half shell and the second half shell so that the first half shell and the second half shell are clamped and connected with the first connecting member and the second connecting member, and the cutting member is connected to the pre-tightening member and can cut off the pre-tightening member under the action of an external force so that the first half shell, the second half shell are separated from the first connecting member and the second connecting member.

2. The detachable connection structure according to claim 1, characterized in that: The first half shell and the second half shell are combined to form an inner cavity. The first connecting member has a first chuck, and the second connecting member has a second chuck. The first chuck is clamped to the top surface of the inner cavity, and the second chuck is clamped to the bottom surface of the inner cavity.

3. The detachable connection structure according to claim 2, characterized in that: The first connecting member also has a plurality of first rolling balls, which are all located on the side of the first chuck facing away from the second connecting member and are arranged around the circumference of the first chuck. The plurality of first rolling balls simultaneously abut against the top surface of the inner cavity.

4. The detachable connection structure according to claim 2, characterized in that: The second connecting member also has a plurality of second balls, which are all located on the side of the second chuck facing away from the first connecting member and are arranged around the circumference of the second chuck. The plurality of second balls abut against the bottom surface of the inner cavity at the same time.

5. The detachable connection structure according to claim 1, characterized in that: The preload member includes a preload rod, a first spring and a second spring. The two ends of the preload rod are respectively connected to the first half shell and the second half shell. The first spring and the second spring are respectively sleeved on both sides of the preload rod and both accumulate elastic force, and can drive the first half shell to separate from the second half shell when the preload rod is cut off.

6. The detachable connection structure according to claim 5, characterized in that: The first half shell and the second half shell are both provided with a clamping hole, and two clamping holes are penetrated at both ends of the preload rod. Both ends of the preload rod are L-shaped and respectively clamped with the two clamping holes to limit the separation of the first half shell and the second half shell.

7. The detachable connection structure according to claim 2, characterized in that: The preload member is arranged in the inner cavity and located between the first chuck and the second chuck. The cutting member passes through the first connecting member and extends into the inner cavity to be sleeved on the middle part of the preload member. The cutting member can cut off the preload member under the action of external force.

8. The detachable connection structure according to claim 1, characterized in that: The limiting member further includes a positioning pin. The first half shell and the second half shell are both provided with positioning grooves and are plugged in through the positioning pin.

9. The detachable connection structure according to claim 1, characterized in that: The first connecting member has two first connecting pins arranged at intervals, and the first connecting pins are used to connect the parachute rope and are connected to the parachute body through the parachute rope; the second connecting member has two second connecting pins arranged at intervals, and the second connecting pins are used to connect the suspension rope and connect the load through the suspension rope.

10. A parachute, characterized in that: The invention comprises an umbrella body, an umbrella rope, a load and a detachable connection structure as described in any one of claims 1 to 9, wherein one end of the umbrella rope is connected to the umbrella body, the other end of the umbrella rope is connected to the first connecting member and the cutting member, the load is connected to the second connecting member, and the umbrella rope can drive the cutting member to cut the pretensioning member when being straightened.

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