A detachable connection structure and parachute

Abstract

The present invention discloses a detachable connection structure and a parachute, relating to the technical field of parachutes. The connection structure includes a connection mechanism and a pre-tensioning mechanism. The connection mechanism includes a first connection member and a second connection member, which can be used to respectively connect the parachute body and the load. The pre-tensioning mechanism includes a pre-tensioning member, a limiter, and a cutting member. The pre-tensioning member is connected to the limiter so that opposite sides of the limiter are respectively connected to the first connection member and the second connection member. The cutting member is connected to the pre-tensioning member and can be cut off by an external force to separate the pre-tensioning member from the first connection member and the second connection member, thereby separating the pre-tensioning member from the parachute body. The load is no longer buffered by the parachute body and can be quickly dropped to a target landing point. By providing a connection structure, the present invention can separate the load from the parachute body after 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.

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] Parachutes are primarily made of breathable, flexible fabric and foldable into a bag or capsule. During operation, they rapidly inflate under the influence of aerodynamic forces, achieving rapid deceleration and a stable descent, allowing dropped objects or people to land safely. Parachutes currently play a critical role in the aerospace industry, and their purpose has evolved beyond simply landing objects. They also provide rapid deceleration, allowing attached objects to quickly reach a predetermined speed and proceed with subsequent operations. They have a wide range of applications, offer effective deceleration, and are relatively inexpensive compared to other methods.

[0003] The prior art with announcement number CN212448115U discloses a parachute that is easy to search and recover, including a canopy, parachute lines, and dropped objects, and is characterized in that: each of the parachute lines includes an upper connecting line on the canopy that is combined with the canopy, and a lower suspension line connected to the lower end of the upper connecting line; several of the upper connecting lines are at least partially fixed with reflective material and the fixing method is sewing, and the lower suspension line and the canopy sector are also sewn with reflective material. The method of sewing reflective material on the lines 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, this existing parachute also 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 can 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 propose a detachable connection structure and 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, causing negative effects of the parachute.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0007] In a first aspect, the present invention provides a detachable connection structure, comprising:

[0008] A connecting mechanism comprising a first connecting member and a second connecting member; and

[0009] The pre-tightening mechanism includes a pre-tightening member, a limiting member and a cutting member. 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 clamp and connect the first connecting member and the second connecting member. The cutting member is connected to the pre-tightening member and can cut off the pre-tightening member under the action of external force to separate the first half shell and the second half shell from the first connecting member and the second connecting member.

[0010] In some embodiments, the first half shell and the second half shell enclose 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.

[0011] 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 the top surface of the inner cavity.

[0012] 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.

[0013] 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 and the second half shell to separate when the pre-tightening rod is cut off.

[0014] In some embodiments, both the first half shell and the second half shell are provided with a clamping hole, and two clamping holes are passed through the two 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.

[0015] 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.

[0016] 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.

[0017] 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 lines and are connected to the parachute body through the parachute lines; the second connector has two second connecting pins arranged at intervals, and the second connecting pins are used to connect the slings and connect the load through the slings.

[0018] In a second aspect, the present invention also provides a parachute, comprising a parachute body, a parachute rope, a load, and the above-mentioned detachable connection structure, 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 pre-tensioning piece when being straightened.

[0019] Compared to the prior art, the present invention provides a detachable connection structure, with a first connector and a second connector that can be used to connect the parachute body and the payload, respectively, so that the parachute body, while cushioned by air, can assist the payload in landing safely. The parachute body is connected to the connection structure via a parachute cord, which is connected to a cutting member. When the cord is straightened, it exerts an external force on the cutting member, triggering the cutting member to enter a delayed state. After the delay, the cutting member severs the pretensioner, separating the first and second half shells and releasing the connection between the first and second connectors. The first and second connectors can then be separated, thereby separating the load from the parachute body. The load is no longer cushioned by the parachute body and can quickly descend to the target landing point. By providing this connection structure, the present invention can separate the load from the parachute body after the parachute has been in stable descent for a certain period of time, preventing the parachute from dragging the load away from the target landing point. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a structural diagram of a connection structure provided by an embodiment of the present invention;

[0021] Figure 2 is a cross-sectional schematic diagram of a connection structure provided by an embodiment of the present invention;

[0022] Figure 3 is a disassembled schematic diagram of a connection structure provided by an embodiment of the present invention;

[0023] Figure 4 is a cross-sectional schematic diagram of a cutting piece provided by an embodiment of the present invention;

[0024] Figure 5 It is a schematic structural diagram of a parachute provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to 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.

[0026] 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 has a negative effect on the parachute, the present invention provides a detachable connection structure that can drive the load and the parachute body to separate in time when the parachute landing tends to be stable, so as to prevent the parachute body from driving the load away from the target landing point.

[0027] 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 application of the detachable connection structure to a parachute is used as an example for explanation. 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.

[0028] See also Figure 1 , Figure 1 This is a schematic diagram of a detachable connection structure 100 according to an embodiment of the present invention. The detachable connection structure 100 includes a connection mechanism 1 and a pre-tensioning mechanism 2. The connection mechanism 1 includes a first connector 11 and a second connector 12. The first connector 11 is used to connect the parachute to the body via the parachute cord, and the second connector 12 is used to connect the load. The first connector 11 and the second connector 12 are connected by the pre-tensioning mechanism 2, thereby connecting the parachute to the load. The parachute, when cushioned by air, can assist the load in landing safely. The pre-tensioning mechanism 2 can initiate a delayed separation when the parachute cord is straightened. After a certain period of time, the pre-tensioning mechanism 2 automatically disintegrates, and the first connector 11 and the second connector 12 separate, thereby separating the load from the parachute body and preventing the parachute from dragging the load away from the target landing point.

[0029] The pre-tensioning mechanism 2 includes a pre-tensioning member 21, a limiting member 22, and a cutting member 23. The pre-tensioning member 21 is connected to the limiting member 22, so that 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, assisting in the safe landing of the load. The cutting member 23 is connected to the pre-tensioning member 21 and can cut the pre-tensioning member 21 under the action of an external force. Specifically, the cutting member 23 is connected to one or more parachute lines. When the parachute lines are straightened, the parachute lines can exert external force on the cutting member 23, triggering the cutting member 23 to enter a delayed cutting state. After a preset time, the cutting member 23 can cut the pre-tensioning member 21, thereby separating the pre-tensioning member 21 from the first connecting member 11 and the second connecting member 12. The first connecting member 11 and the second connecting member 12 are no longer restricted and can separate from each other, thereby separating the load from the parachute body.

[0030] In one embodiment, see Figure 2 The retaining member 22 includes a first half shell 221 and a second half shell 222, which are connected by a preload 21. The first half shell 221 is connected to the first connector 11, and the second half shell 222 is connected to the second connector 12, thereby indirectly connecting the first connector 11 and the second connector 12. The preload 21 connects the first half shell 221 and the second half shell 222 to prevent premature separation of the first and second half shells 221, 222, which could cause the load to escape from the parachute. When the load needs to be separated from the parachute, the cutting member 23 can be driven to cut the preload 21, separating and unlocking the first and second half shells 221, 222, and separating the first and second connectors 11, 12, and the load is separated from the parachute.

[0031] 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 connecting member 11 has a first chuck 111, and the second connecting member 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 connecting member 11 and the second connecting member 12 are respectively clamped to the top surface and the top surface of the inner cavity 223 of the limiting member 22 to complete an indirect connection through the limiting member 22. The limiting member 22 of this embodiment is connected to the first connecting member 11 and the second connecting member 12 by an internal clamping method, which is not only stable but also convenient for subsequent unlocking. In other embodiments, the first connecting member 11 and the second connecting member 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.

[0032] In one embodiment, see Figure 2 The first connecting member 11 also has a plurality of first balls 112. The plurality of first balls 112 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. The plurality of first balls 112 simultaneously abut 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 via the plurality of first balls 112, so that the first connecting member 11 can rotate after being connected to the parachute cord, which is beneficial for enhancing the flexibility of the parachute cord movement and making the parachute cord less likely to become tangled during use. In addition, the contact area between the first balls 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 parachute cord movement and reduce wear on components.

[0033] In one embodiment, see Figure 2The second connector 12 also has a plurality of second balls 122. These are located on the side of the second chuck 121 facing away from the first connector 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 connector 12 of this embodiment has the same structure as the first connector 11 described above, and is connected to the retaining member 22 in the same manner, which will not be described here. The second connector 12 can also be rotatably connected to the retaining member 22 via the plurality of second balls 122, allowing the rope connected to the load to rotate flexibly to prevent the rope from becoming tangled.

[0034] 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 In the illustrated embodiment, the preload rod 211 has two ends connected to the first and second half shells 221, 222, respectively. The first and second springs 212, 213 are respectively sleeved onto the sides of the preload rod 211 and each stores elastic force. Because the ends of the preload rod 211 lock the first and second half shells 221, 222, the first and second springs 212, 213 are unable to eject the first and second half shells 221, 222. When the preload rod 211 is severed by the cutting member 23, the preload rod 211 releases its lock on the first and second half shells 221, 222. The first and second springs 212, 213 can then simultaneously release their elastic force, driving the first and second half shells 221, 222 apart, thereby separating the first and second connectors 11, 12.

[0035] 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. The two ends of the pre-tightening rod 211 pass through the locking holes 224 on the first half shell 221 and the second half shell 222, respectively, and are bent and locked. Specifically, both ends of the pre-tightening rod 211 are L-shaped, and the ends of the L-shaped parts are respectively engaged with the two locking holes 224 to prevent the first half shell 221 from separating from 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 portion of the pre-tightening rod 211 is severed by the cutting member 23, the pre-tightening rod 211 no longer has a locking effect on the first half shell 221 and the second half shell 222.

[0036] In one embodiment, see Figure 2The preload rod 211 is disposed within the inner cavity 223 and is located between the first chuck 111 and the second chuck 121. The cutting element 23 penetrates the first connector 11 and extends into the inner cavity 223, where it is sleeved onto the middle portion of the preload rod 211. The cutting element 23 is capable of severing the preload rod 211 under the action of an external force. In this embodiment, the first connector 11 has a through hole. One end of the cutting element 23 penetrates the through hole and sleeved onto the middle portion of the preload rod 211. The other end of the cutting element 23 is used to connect to the parachute lines and, through the lines, to the parachute body. During the parachute release process, before the lines are straightened, the cutting element 23 does not apply tension to the preload rod 211. When the lines are straightened, the lines apply tension to the cutting element 23, triggering the cutting element 23 to enter a delayed cutting state. After a period of time, the cutting element 23 severs the preload rod 211. This embodiment utilizes the inner cavity 223 space rationally and features an ingenious structure, with little wasted space. The structure is compact and occupies little space.

[0037] In one embodiment, see Figure 4 The cutting element 23 comprises a barrel 231, a pull ring 232, a drive spring 233, a firing pin 234, a trigger powder 235, a pneumatic powder 236, a delay body 237, a movable baffle 238, and a blade 239. The bottom of the barrel 231 has a through-hole 80 for the preload rod 211 to pass through. A movable cavity is defined within the barrel 231. The outer wall of the delay body 237 is connected to the wall of the movable cavity. The head of the delay body 237 is provided with a trigger powder 235. A drive chamber 240 is formed between the tail of the delay body 237 and the blade 239. The pneumatic powder 236 is located in the drive chamber 240. The pull ring 232 is used to connect to the parachute's drawstring. One end of the drive spring 233 is connected to the firing pin 234, while the other end abuts the barrel 231. The pull ring 232 is connected to the firing pin 234 via a thin wire that passes through the drive 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 drive spring 233 to accumulate elastic force until the thin wire is broken. The drive 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 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.

[0038] Therefore, when the parachute cord is straightened, blade 239 does not immediately cut preload rod 211. Instead, the cutting mechanism is triggered first. Only when the pneumatic powder 236 burns to a certain degree will blade 239 be driven to cut preload rod 211. During this period of combustion, the parachute cord remains straightened. The length of this buffer period can be adjusted by adjusting the content of pneumatic powder 236 and the size of delay element 237. The specific setting can be achieved through multiple experiments.

[0039] 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 connected by the positioning pin 225. In this embodiment, during the installation process 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 to pre-fix them, 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 to facilitate quick installation.

[0040] In one embodiment, see Figure 2 The first connector 11 also has a first connecting pin 113, which is used to connect to the parachute lines and, through the lines, to the parachute body. The second connector 12 also has a second connecting pin 123, which is used to connect to the suspension ropes and, through the suspension ropes, to the load. In this embodiment, two first connecting pins 113 and two second connecting pins 123 are provided, spaced apart. Both first connecting pins 113 can connect to the parachute lines, and both second connecting pins 123 can connect to the suspension ropes, ensuring a stable connection.

[0041] See also Figure 5 In a second aspect, the present invention further provides a parachute 200, comprising a parachute body 3, parachute lines 4, a load 5, and the above-mentioned detachable connection structure 100, wherein the parachute lines 4 have multiple roots, the two ends of a part of the parachute lines 4 are respectively connected to the parachute body 3 and the first connecting member 11, and the two ends of another part of the parachute lines 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. All the parachute lines 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-tensioning rod 211, and the first connecting member 11 is separated from the second connecting member 12. The load 5 is no longer affected by the parachute body 3 and will not be deviated by the parachute body 3.

[0042] 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:

[0043] The detachable connection structure 100 provided by the present invention comprises a first connector 11 and a second connector 12, which can be used to respectively connect the parachute body 3 and the payload 5, so that the parachute body 3, while being cushioned by air, can assist the payload 5 in safely landing. During the release process of the parachute 200, the parachute cord 4 is gradually straightened by the airflow and the load. As the cord 4 is straightened, it exerts an external force on the cutting element 23, triggering the cutting element 23 to enter a delayed state. After the delayed waiting time, the cutting element 23 severs the preload rod 211. Under the elastic action of the first spring 212 and the second spring 213, the first half shell 221 separates from the second half shell 222. The stopper 22 releases the connection limit on the first and second connectors 11 and 12, separating the first and second connectors 11 and 12. As a result, the payload 5 is separated from the parachute body 3. The payload 5 is no longer cushioned by the parachute body 3 and can quickly descend to the target landing point, preventing the parachute body 3 from dragging the payload away from the target landing point.

[0044] The specific embodiments of the present invention described above do not limit the scope of protection 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 scope of protection 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 A pre-tightening mechanism includes a pre-tightening member, a limiting member, and a cutting member, wherein the limiting member includes two separable first and second half shells, the pre-tightening member connects the first and second half shells so that the first and second half shells clamp and connect the first and second connecting members, and the cutting member connects the pre-tightening member and can cut the pre-tightening member under the action of an external force to separate the first and second half shells from the first and second connecting members; 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.

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 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 balls simultaneously abut 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 simultaneously abut the bottom surface of the inner cavity.

5. The detachable connection structure according to claim 1, characterized in that: Both the first half shell and the second half shell are provided with a clamping hole, and two clamping holes are passed through the two 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.

6. The detachable connection structure according to claim 2, characterized in that: The pre-tightening member is arranged 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 pre-tightening member. The cutting member can cut off the pre-tightening member under the action of external force.

7. 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 a positioning groove and are plugged in through the positioning pin.

8. The detachable connection structure according to claim 1, wherein: 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 sling and connect the load through the sling.

9. A parachute, characterized in that: The invention comprises an umbrella body, an umbrella cord, a load, and a detachable connection structure according to any one of claims 1 to 8, wherein one end of the umbrella cord is connected to the umbrella body, the other end of the umbrella cord is connected to the first connecting member and the cutting member, the load is connected to the second connecting member, and the umbrella cord can drive the cutting member to cut the pre-tensioning member when being straightened.

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