A latch seal assembly for an umbrella opener

Abstract

The utility model provides a kind of latch seal assembly of umbrella opener, including cylinder and end cap, the end face center of cylinder, end cap is all set with the through-hole allowing latch to pass through, cylinder inside is equipped with sealing ring and sealing oil, the sealing ring is sleeved on the outside of latch;The side wall of end cap is set with blind hole along radial direction, the end of blind hole extends into the through-hole in the center of end cap, sealing ball and elastic element are equipped in blind hole, and the elastic element is used to force sealing ball to move to the end of blind hole;Limiting assembly is equipped on the end cap, for preventing elastic element from coming out.The utility model can realize static sealing to latch in position by setting sealing ring and sealing oil in cylinder;Meanwhile, by setting sealing ball and elastic element in end cap, when pulling out latch, sealing ball can be driven by elastic element to seal the through-hole in end cap, realize dynamic sealing after pulling out latch, so as to satisfy the dynamic sealing of wading / sand scene.

Description

Technical Field

[0001] This utility model relates to the field of parachute opener technology, and in particular to a pin sealing assembly for an opener. Background Technology

[0002] The automatic parachute opener is a crucial device for ensuring parachuting safety. Its core function is to trigger the parachute deployment procedure via a pin at a safe altitude. This action relies on an internal mechanism where a compressed spring instantly releases energy, rapidly retracting the deployment cable connected to the parachute pack, thereby reliably opening the parachute.

[0003] The existing parachute deployer lock box requires the safety pin to be pulled out upon activation, which creates a through-hole on the side of the lock box housing. When the parachute lands in harsh environments such as the sea or desert, water and sand can directly enter the lock box through this hole. Sand infiltration can cause the diaphragm and lever transmission mechanism to jam, and salt water can easily cause corrosion of metal parts and short circuits, leading to the failure of precision components inside the lock box.

[0004] Traditional protection solutions rely on static sealing when the pin is in place (such as O-rings). Once the pin is removed, the sealing function is lost, which cannot meet the automatic protection requirements of water / dust scenarios. Existing technologies lack a dynamic sealing mechanism that is triggered instantly after the pin is removed and requires no manual intervention.

[0005] Therefore, there is an urgent need to develop a self-closing sealing structure that is linked to the action of removing the pin, which can automatically close the channel when the umbrella is triggered, so as to ensure the integrity and recyclability of the internal mechanism of the lock box under extreme environments. Utility Model Content

[0006] This invention proposes a pin sealing assembly for a parachute opener, which solves the problems in the prior art where the parachute opener relies on static sealing when the pin is in place, and loses its sealing function once the pin is removed, thus failing to meet the automatic protection requirements in water / dust scenarios.

[0007] The technical solution of this utility model is implemented as follows:

[0008] This utility model provides a pin sealing assembly for an umbrella opener, including a cylindrical body and an end cap. Both the cylindrical body and the end cap have through holes at their center, allowing the pin to pass through. The cylindrical body contains a sealing ring and sealing oil, with the sealing ring fitted over the pin. The end cap has a blind hole radially formed on its side wall, the end of which extends into the through hole at the center of the end cap. A sealing ball and an elastic element are disposed within the blind hole. The outer diameter of the sealing ball is larger than the inner diameter of the through hole at the center of the end cap. The elastic element forces the sealing ball to move to the end of the blind hole. A limiting assembly is provided on the end cap to prevent the elastic element from dislodging.

[0009] Specifically, the limiting component is a sleeve, which is rotatably fitted onto the outside of the end cap, and the side wall of the sleeve has an clearance opening corresponding to the blind hole.

[0010] Specifically, the cylinder includes an outer cylinder and an inner cylinder arranged coaxially. The inner cavity of the inner cylinder and the gap between the outer cylinder and the inner cylinder are filled with sealing oil. The end cap is detachably connected to the open end of the outer cylinder. The inner cylinder is provided with a first sealing ring at one end near the end cap and a second sealing ring at the other end away from the end cap. The first sealing ring and the second sealing ring are pressed and sealed by the connection between the end cap and the outer cylinder.

[0011] Preferably, the end of the inner cylinder away from the end cap is open, and a gasket is provided between the open end face of the inner cylinder and the second sealing ring.

[0012] Preferably, the outer wall of the inner cylinder is provided with a sealing groove, and a third sealing ring is embedded in the sealing groove.

[0013] Preferably, the first sealing ring and the second sealing ring are interference-fitted with the pin.

[0014] Optionally, the open end of the outer cylinder is snapped into an end cap or connected by a thread.

[0015] Preferably, the open end of the outer cylinder is provided with an external thread, and the inner side of the end cap is provided with an internal thread that matches the external thread.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] (1) By setting a sealing ring and sealing oil in the cylinder, this utility model can achieve static sealing of the pin in the position; at the same time, by setting a sealing ball and elastic element in the end cap, when the pin is pulled out, the elastic element can drive the sealing ball to seal the through hole in the end cap, thereby achieving dynamic sealing after the pin is pulled out, thus meeting the dynamic sealing requirements of water / dust scenarios.

[0018] (2) This utility model designs a double-cylinder structure and fills the inner cavity of the inner cylinder and the gap between the outer cylinder and the inner cylinder with sealing oil. Sealing rings are set at both ends of the inner cylinder. Through the cooperation of sealing oil and sealing rings, the static sealing performance of the sealing component to the pin is improved on the one hand, and the friction between the pin and the sealing ring can be lubricated on the other hand, so as to meet the use requirements of the umbrella opener in high reliability requirements and complex and harsh environments.

[0019] (3) By setting one end of the inner cylinder as an open end, the sealing oil can quickly fill the inner cavity of the inner cylinder when the inner cylinder is inserted into the outer cylinder; at the same time, by setting a gasket on the open end face of the inner cylinder, the pin can be prevented from pulling the second sealing ring during rapid movement, which would cause large deformation and lead to oil leakage.

[0020] (4) By opening a sealing groove on the outside of the inner cylinder and embedding a sealing ring, this utility model further improves the static sealing performance of the sealing assembly for the pin. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the internal structure of the pin sealing assembly of an umbrella opener according to the present invention;

[0023] Figure 2 This is an exploded view of the pin sealing assembly of an umbrella opener according to the present invention.

[0024] Figure 3 This is a schematic diagram of the external structure of the sealing assembly when the clearance opening is aligned with the blind hole in an embodiment of this utility model;

[0025] Figure 4 This is a schematic diagram of the external structure of the sealing assembly when the clearance opening and the blind hole are misaligned in an embodiment of this utility model;

[0026] In the diagram: 1. End cap; 2. Through hole; 3. Blind hole; 4. Sealing ball; 5. Elastic element; 6. Sleeve; 7. Clearance opening; 8. Outer cylinder; 9. Inner cylinder; 10. First sealing ring; 11. Second sealing ring; 12. Third sealing ring; 13. External thread; 14. Internal thread. Detailed Implementation

[0027] The technical solution of this utility model will be clearly and completely described below with reference to its embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] Reference Figures 1 to 4This utility model provides a pin sealing assembly for an umbrella opener, including a cylindrical body and an end cap 1. Both the cylindrical body and the end cap 1 have through holes 2 at their center, allowing the pin to pass through. The cylindrical body contains a sealing ring and sealing oil, with the sealing ring fitted over the pin. The end cap 1 has a blind hole 3 radially formed on its side wall, with the end of the blind hole 3 extending into the through hole 2 at the center of the end cap 1. The blind hole 3 contains a sealing ball 4 (in this embodiment, a steel ball; the specific type of sealing ball 4 can be flexibly selected according to actual conditions) and an elastic element 5 (in this embodiment, a spring; the specific type of elastic element 5 can be flexibly selected according to actual conditions). The outer diameter of the sealing ball 4 is larger than the inner diameter of the through hole 2 at the center of the end cap 1 (the through hole 2 at the center of the end cap 1 is cut off by the blind hole 3, and the outer wall of the sealing ball 4 abuts against the cut-off end face of the through hole 2 for sealing). The elastic element 5 is used to force the sealing ball 4 to move to the end of the blind hole 3. The end cap 1 has a limiting assembly to prevent the elastic element 5 from dislodging.

[0029] This invention achieves static sealing of the pin in the in-position state by setting a sealing ring and sealing oil inside the cylinder; at the same time, by setting a sealing ball 4 and an elastic element 5 inside the end cap 1, when the pin is pulled out, the elastic element 5 can drive the sealing ball 4 to seal the through hole 2 inside the end cap 1, thereby achieving dynamic sealing after the pin is pulled out, thus meeting the dynamic sealing requirements of water / dust scenarios.

[0030] Specifically, such as Figures 1 to 4 As shown, the limiting component is a sleeve 6, which is rotatably fitted onto the outside of the end cap 1. The side wall of the sleeve 6 has a clearance opening 7 corresponding to the blind hole 3. When the pin is inserted into the lock box of the umbrella opener through the central through hole 2 of the end cap 1 and the cylinder body, rotating the sleeve 6 causes the clearance opening 7 to be misaligned from the blind hole 3 (e.g., ...). Figure 4 As shown), the spring is in a compressed state at this time, with one end of the spring abutting against the sealing ball 4 and the other end abutting against the inner wall of the sleeve 6. When the pin is pulled out, the spring will quickly release its elastic force to squeeze the sealing ball 4, causing the sealing ball 4 to move to the end of the blind hole 3. At this time, the sealing ball 4 just blocks the through hole 2 in the center of the end cap 1, thus playing a sealing role and preventing external moisture, sand, etc. from entering the lock box through the through hole 2. When the lock box is recycled for reuse, simply rotate the sleeve 6 to align the clearance opening 7 with the blind hole 3 (as shown). Figure 3 (As shown), remove the spring, insert the pin and install the spring, then rotate the sleeve 6 to offset the clearance opening 7 from the blind hole 3.

[0031] Specifically, such as Figure 1 , 2As shown, the cylindrical body includes an outer cylinder 8 and an inner cylinder 9 coaxially arranged. The inner cavity of the inner cylinder 9 and the gap between the outer cylinder 8 and the inner cylinder 9 are filled with sealing oil. The end cap 1 is detachably connected to the open end of the outer cylinder 8. The inner cylinder 9 has a first sealing ring 10 at one end near the end cap 1 and a second sealing ring 11 at the other end away from the end cap 1. The connection between the end cap 1 and the outer cylinder 8 achieves a tight seal between the first sealing ring 10 and the second sealing ring 11. This utility model, by designing a double-cylinder structure and filling the inner cavity of the inner cylinder 9 and the gap between the outer cylinder 8 and the inner cylinder 9 with sealing oil, and setting sealing rings at both ends of the inner cylinder 9, improves the static sealing performance of the sealing assembly for the pin through the cooperation of the sealing oil and the sealing rings. On the other hand, it lubricates the friction between the pin and the sealing rings, thereby meeting the needs of the umbrella opener in high reliability requirements and complex and harsh environments.

[0032] Preferably, such as Figure 1 As shown, the end of the inner cylinder 9 furthest from the end cap 1 is open, and a metal washer (not shown in the figure) is provided between the open end face of the inner cylinder 9 and the second sealing ring 11. By making the end of the inner cylinder 9 furthest from the end cap 1 (i.e. the end that extends into the outer cylinder 8) open, the sealing oil can quickly fill the inner cavity of the inner cylinder 9 when the inner cylinder 9 is inserted into the outer cylinder 8, ensuring that the inner cavity of the inner cylinder 9 is full of sealing oil. At the same time, by providing a washer on the open end face of the inner cylinder 9, the problem of the second sealing ring 11 failing due to large deformation caused by the pin pulling the second sealing ring 11 during rapid movement is avoided.

[0033] Preferably, such as Figure 1 , 2 As shown, a sealing groove (not shown in the figure) is provided on the outer wall of the inner cylinder 9, and a third sealing ring 12 is embedded in the sealing groove; by setting the third sealing ring 12, the inner cylinder 9 and the outer cylinder 8 are more tightly fitted, and the sealing performance of the sealing assembly is further improved.

[0034] Preferably, the first sealing ring 10 and the second sealing ring 11 are interference-fitted with the pin, and the inner diameter of the first sealing ring 10 and the second sealing ring 11 is slightly smaller than the outer diameter of the wire rope, thereby maximizing the sealing performance of the sealing rings.

[0035] Optionally, the open end of the outer cylinder 8 can be snapped into or threaded into the end cap 1. The specific method of detachable connection can be flexibly selected according to the actual situation and is not limited to the snap-fit ​​and threaded connection mentioned in this embodiment.

[0036] Preferably, such as Figure 1 , 2As shown, the open end of the outer cylinder 8 is provided with an external thread 13, and the inner side of the end cap 1 is provided with an internal thread 14 that matches the external thread 13; the open end of the outer cylinder 8 and the end cap 1 are connected by threads, and a fourth sealing ring (not shown in the figure) is provided on the outside of the threaded interface of the outer cylinder 8, so that the threaded surfaces of the outer cylinder 8 and the end cap 1 are sealed; the end face of the end cap 1 abuts against the first sealing ring 10, and the first sealing ring 10 can be compressed by tightening the end cap 1, and then the second sealing ring 11 is further compressed by the extrusion force transmitted axially by the inner cylinder 9, thereby ensuring the sealing effect of the sealing assembly.

[0037] In this embodiment, all sealing rings used are O-rings.

[0038] The installation method of the sealing component in this embodiment is as follows:

[0039] First, place the second sealing ring 11 and the washer into the inner side of the end face of the outer cylinder 8 in sequence. Then, fill the inside of the outer cylinder 8 with sealing oil and insert the inner cylinder 9 into the outer cylinder 8 (with the opening of the inner cylinder 9 facing the end face of the outer cylinder 8). Next, place the first sealing ring 10 into the inner side of the end cap 1 near the cylinder body. After the sealing oil fills the inner cavity of the inner cylinder 9 and the gap between the outer cylinder 8 and the inner cylinder 9, lock the end cap 1 and the outer cylinder 8 with a threaded connection. Then, rotate the sleeve 6 to align the clearance opening 7 with the blind hole 3, remove the spring, insert the pin and install the spring, and then rotate the sleeve 6 to offset the clearance opening 7 from the blind hole 3.

[0040] In use, pulling out the pin triggers the unlocking mechanism inside the lock box to release the compressed spring, which in turn drives the steel wire rope to move quickly to open the umbrella. After the pin is pulled out, the spring releases its elasticity and pushes the steel ball to the center through hole 2 of the end cap 1 to seal the through hole 2, thus achieving dynamic sealing after the pin is pulled out.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pin sealing assembly for an umbrella opener, characterized in that, The device includes a cylindrical body and an end cap (1). The end faces of both the cylindrical body and the end cap (1) are provided with through holes (2) that allow the pin to pass through. The cylindrical body is provided with a sealing ring and sealing oil inside, and the sealing ring is fitted outside the pin. The side wall of the end cap (1) is provided with a blind hole (3) along the radial direction. The end of the blind hole (3) extends into the through hole (2) in the center of the end cap (1). The blind hole (3) is provided with a sealing ball (4) and an elastic element (5). The outer diameter of the sealing ball (4) is larger than the inner diameter of the through hole (2) in the center of the end cap (1). The elastic element (5) is used to force the sealing ball (4) to move to the end of the blind hole (3). The end cap (1) is provided with a limiting component to prevent the elastic element (5) from coming out.

2. The pin sealing assembly for an umbrella opener as described in claim 1, characterized in that, The limiting component is a sleeve (6), which is rotatably sleeved on the outside of the end cap (1). The side wall of the sleeve (6) is provided with a clearance opening (7) corresponding to the blind hole (3).

3. The pin sealing assembly for an umbrella opener as described in claim 1, characterized in that, The cylinder body includes an outer cylinder (8) and an inner cylinder (9) arranged coaxially. The inner cavity of the inner cylinder (9) and the gap between the outer cylinder (8) and the inner cylinder (9) are filled with sealing oil. The end cap (1) is detachably connected to the open end of the outer cylinder (8). The inner cylinder (9) is provided with a first sealing ring (10) at one end near the end cap (1) and a second sealing ring (11) at the other end away from the end cap (1). The first sealing ring (10) and the second sealing ring (11) are pressed and sealed by the connection between the end cap (1) and the outer cylinder (8).

4. The pin sealing assembly for an umbrella opener as described in claim 3, characterized in that, The end of the inner cylinder (9) away from the end cap (1) is open, and a gasket is provided between the open end face of the inner cylinder (9) and the second sealing ring (11).

5. The pin sealing assembly for an umbrella opener as described in claim 3, characterized in that, The outer wall of the inner cylinder (9) is provided with a sealing groove, and a third sealing ring (12) is embedded in the sealing groove.

6. The pin sealing assembly for an umbrella opener as described in claim 3, characterized in that, The first sealing ring (10) and the second sealing ring (11) are interference-fitted with the pin.

7. The pin sealing assembly for an umbrella opener as described in claim 3, characterized in that, The open end of the outer cylinder (8) is snapped into the end cap (1) or connected by threads.

8. The pin sealing assembly for an umbrella opener as described in claim 7, characterized in that, The open end of the outer cylinder (8) is provided with an external thread (13), and the inner side of the end cap (1) is provided with an internal thread (14) that matches the external thread (13).

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