Steel cable and bolt waterproof structure of automatic parachute opening device

Abstract

The invention belongs to the field of airborne landing and airdrop of airplanes, and particularly relates to a steel cable and bolt waterproof structure of an automatic parachute opening device. A traditional umbrella opening device does not have a waterproof function, and parts of the umbrella opening device are rusted after water enters the umbrella opening device. A waterproof rubber sleeve is installed on a steel cable pipeline, and a sealing ball is fixed to a steel cable; the unlocking mechanism comprises a push rod assembly in the shell, the push rod assembly is provided with a rubber pad in the middle of a push rod, the circumferential outer edge of the rubber pad is fixed to the step face of the shell to separate an inner cavity and an outer cavity, the inner end of the push rod abuts against the lock rod to lock the gear train, and the outer end of the push rod is limited through a plug pin. When the plug pin is pulled out, the push rod assembly is far away from the gear train under the action of the rebound spring, the power is released in time after preset time, the spring pulls the parachute pack sealing rope, and the sealing ball on the steel rope is clamped in the waterproof rubber sleeve. The problem of water leakage caused by damage of the rubber pad is greatly reduced, the waterproof reliability is ensured, the structure is compact, the reliability is high, and additional operation is not needed during use.

Description

Technical Field

[0001] The invention belongs to the field of aircraft airborne airdrop, and in particular relates to a steel cable and latch waterproof structure of an automatic parachute opener. Background Art

[0002] Traditional parachute openers are not waterproof. When water enters the parachute opener, its parts will rust, and when seawater evaporates, salt crystals will form inside the parachute opener. Both will affect the normal opening function of the parachute opener.

[0003] In addition to the parts that need to be statically sealed and waterproof, there are two places where the inside of the parachute opener is connected to the outside world, namely the pin and the steel cable. Both of the above places are moving and cannot be simply sealed with rubber rings. Summary of the invention

[0004] The invention aims at the problem of waterproofing of current umbrella openers and provides a sealed automatic umbrella opener with strong environmental adaptability, so that the umbrella opener can complete dynamic sealing without wearing rubber parts.

[0005] The present invention provides a steel cable and latch waterproof structure of an automatic parachute opener, the automatic parachute opener comprises a housing, a steel cable pipeline, a steel cable, a power spring, a gear train and an unlocking mechanism, the steel cable pipeline has a steel cable waterproof structure, the unlocking mechanism has a latch waterproof structure, wherein

[0006] A waterproof rubber sleeve is installed on the steel cable pipeline, and a sealing ball is fixed on the steel cable;

[0007] The unlocking mechanism includes a push rod assembly in the housing, the push rod assembly has a rubber pad in the middle of the push rod, the circumferential outer edge of the rubber pad is fixed on the step surface of the housing to separate the inner and outer cavities, the inner end of the push rod abuts against the lock rod to lock the gear train, and the outer end is limited by a latch;

[0008] When the pin is pulled out, the push rod assembly moves away from the gear system under the action of the rebound spring, and the parachute opener starts to work. After a predetermined time, the power spring is released in time to pull the parachute bag sealing rope, and the sealing ball on the steel cable is stuck in the waterproof rubber sleeve.

[0009] Advantageously, the waterproof rubber sleeve has a V-shaped groove or a trumpet hole at one end to prevent the sealing ball from being stuck when entering.

[0010] Advantageously, the push rod assembly comprises an upper push rod and a lower push rod fixedly connected along the axial direction.

[0011] Advantageously, the upper push rod has an upper rubber pad, and the circumferential outer edge of the upper rubber pad is fixed on the first step surface of the housing.

[0012] Advantageously, the lower push rod has a lower rubber pad, and the circumferential outer edge of the lower rubber pad is fixed on the second step surface of the housing.

[0013] Advantageously, the locking rod is hinged in the housing at one end, and the outer side of the other end is in contact with the lower push rod.

[0014] Advantageously, the clamping ring is mounted on the housing, and an adjustable movable cover is mounted on the outer end of the clamping ring. The movable cover has radial pin holes, and the tightness of the insertion of the latch can be controlled by adjusting the position of the movable cover.

[0015] Advantageously, the outer end of the latch is fixedly connected to the aircraft via a rope and is pulled out during ejection.

[0016] Advantageously, when the latch is pulled out, the gear train starts to rotate under the impetus of the power spring, generating periodic swings through the clock principle, and after a predetermined time, the power spring is released in time to output the working power.

[0017] Beneficial effects: The present invention adds a push rod and a rubber pad structure between the pin and the gear system of the traditional umbrella opener, so that the strong force of plugging and pulling the pin does not act on the waterproof rubber sleeve pad, thereby increasing the service life of the rubber pad; and greatly reducing the water leakage problem caused by the damage of the rubber pad, ensuring the reliability of waterproofing. The invention has a compact structure, strong reliability, and does not require additional operation when used.

[0018] The features, functions, and advantages that have been discussed can be achieved independently in various examples or may be combined in yet other examples. Further details of the examples can be seen with reference to the following description and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Examples, as well as preferred modes of use, other objects and description thereof, will be best understood by reference to the following detailed description of examples of the invention when read in conjunction with the accompanying drawings, in which:

[0020] Figure 1 It is a schematic diagram of the appearance structure of the automatic parachute opener;

[0021] Figure 2 It is a schematic diagram of the waterproof structure of the steel cable;

[0022] Figure 3 It is a schematic diagram of the waterproof structure of the plug.

[0023] 1-housing, 2-cable pipe, 3-cable, 4-power spring, 5-gear train, 6-unlocking mechanism, 7-sealing ball, 8-waterproof rubber sleeve, 9-locking rod, 10-lower push rod, 11-pressure ring, 12-movable cover, 13-upper push rod, 14-latch, 15-upper rubber pad, 16-lower rubber pad DETAILED DESCRIPTION

[0024] The disclosed examples will be more fully described with reference to the accompanying drawings, in which some (but not all) of the disclosed examples are shown. In fact, many different examples may be described and these examples should not be construed as limited to the examples set forth herein. Instead, these examples are described so that this disclosure will be thorough and complete and will fully convey the scope of the disclosure to those skilled in the art.

[0025] Now, referring to the automatic parachute opener shown in Attachment 1, it comprises a housing 1, a steel cable pipe 2, a steel cable 3, a power spring 4, a gear train 5, and an unlocking mechanism 6. In addition to the static sealing waterproof design, the parachute opener is designed with waterproof structures at two locations connected to the outside world, namely, a steel cable waterproof structure and a latch waterproof structure.

[0026] The static sealing and waterproof design of the automatic umbrella opener is integrated on the housing 1, and each threaded connection is sealed with a sealing ring. The glass window on the housing 1 is formed by a spinning method after filling a rubber ring, and silicone rubber is filled in the gap to achieve sealing.

[0027] Steel cable waterproof structure

[0028] One end of the steel cable 3 is fixed, and the other end passes through the power spring 4 and extends from the steel cable pipe 2. The power spring 4 is fixed at one end and connected to the steel cable 3 at the other end, serving as a power output device for the parachute opener. The gear train 5 can complete timing under the action of the power spring 4, and is a timing device for the parachute opener.

[0029] like Figure 2 As shown, a waterproof rubber sleeve 8 is provided in the steel cable pipe 2, and a sealing ball 7 is fixed on the steel cable 3. After the umbrella opener is completed, the sealing ball 7 is pulled into the hole of the waterproof rubber sleeve 7, thereby achieving a waterproof function. The waterproof rubber sleeve 8 is a tubular structure, and a V-shaped groove is opened at one end to prevent the sealing ball 7 from being stuck when entering.

[0030] Latch waterproof structure

[0031] See also Figure 3The unlocking mechanism 6 includes a locking rod 9, a lower push rod 10, a clamping ring 11, a movable cover 12, an upper push rod 13, a latch 14, an upper rubber pad 15 and a lower rubber pad 16. The clamping ring 11 is mounted on the housing 1, and a push rod assembly is installed inside. The push rod assembly includes an upper push rod 13 and a lower push rod 10 fixedly connected in the axial direction. The upper push rod 13 has an upper rubber pad 15, and the circumferential outer edge of the upper rubber pad 15 is fixed on the first step surface of the housing 1. The lower push rod 10 has a lower rubber pad 16, and the circumferential outer edge of the lower rubber pad 16 is fixed on the second step surface of the housing 1. When the push rod assembly moves in the axial direction, the upper rubber pad 15 and the lower rubber pad 16 maintain the inner and outer sealing, and the outer shell of the umbrella opener is divided into two cavities, the cavity on the side of the gear train 5 is the inner cavity, and the cavity on the side of the latch 14 is the outer cavity. The inner cavity is always not in contact with the outside world, thereby achieving a waterproof function. The movable cover 12 is installed at the outer end of the clamping ring 5 and has a pin hole thereon, through which the push rod assembly is limited by inserting a pin 14.

[0032] The lock rod 9 is hinged on the housing 1 at one end, and the outer side of the other end contacts the lower push rod 10. When the latch 14 is inserted, the lock rod 9 approaches and locks the gear train 5, so that the umbrella opener cannot work; when the latch 14 is pulled out, the push rod assembly moves away from the gear train 5 under the action of the rebound spring, and the umbrella opener starts to work. The push rod assembly plays a transmission role between the latch 14 and the lock rod 9, and divides the umbrella opener housing into two cavities, realizing the full sealing of the cavity on the gear train side.

[0033] The latch 14 acts as a switch by being inserted into and pulled out of the movable cover 12. When the latch 14 is inserted, it contacts the push rod assembly 2, restricting the rebound of the lock rod 9. The lock rod 9 presses against the gear train, making the gear train unable to rotate, and the umbrella opener is in a non-operating state. After the latch 14 is pulled out, the lock rod 9 rebounds under the action of the return spring.

[0034] The clamping ring 11 is connected to the housing by threads, and plays a role in limiting the position of the movable cover 4. The tightness of the insertion of the latch can be adjusted by tightening and loosening the clamping ring 11.

[0035] When the parachute opener is in the waiting state, the latch 14 is inserted into the movable cover 12, and the gear train 5 is locked by the push rod assembly, so that the clock mechanism stops working. The outer end of the latch 14 is fixedly connected to the aircraft through a rope and is pulled out during ejection.

[0036] When the latch 14 is pulled out, the gear train 5 starts to rotate under the push of the power spring 4, and produces periodic swings according to the clock principle. After a predetermined time, the power spring 4 is released in time to output working power, pull the parachute bag rope, and open the parachute. When the power spring 4 is released, it pulls the steel cable 3 so that the sealing ball 7 on the steel cable is stuck in the waterproof rubber sleeve 8, so as to achieve sealing at the pipe.

[0037] When the umbrella opener is working, all waterproof structures take effect to achieve waterproofness of the umbrella opener.

[0038] Descriptions of different advantageous arrangements have been presented for purposes of illustration and description, but the description is not intended to be exclusive or limited to examples of the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. Additionally, different advantageous examples may be described as having different advantages over other advantageous examples. The selected example or examples are selected and described in order to best illustrate the principles of the examples, practical applications, and to enable those of ordinary skill in the art to understand the disclosure as having various examples with various modifications suitable for the particular use contemplated.

Claims

1. A waterproof structure of a steel cable and a latch for an automatic parachute opener, the automatic parachute opener comprising a housing (1), a steel cable conduit (2), a steel cable (3), a power spring (4), a gear train (5) and an unlocking mechanism (6), characterized in that: The steel cable pipeline (2) has a steel cable waterproof structure, and the unlocking mechanism (6) has a latch waterproof structure, wherein A waterproof rubber sleeve (8) is installed on the steel cable pipeline (2), and a sealing ball (7) is fixed on the steel cable (3); The unlocking mechanism (6) comprises a push rod assembly in a housing (1), wherein the push rod assembly has a rubber pad in the middle of the push rod, the circumferential outer edge of the rubber pad is fixed on the step surface of the housing (1) to separate the inner and outer cavities, the inner end of the push rod abuts against the locking rod (9) to lock the gear train (5), and the outer end is limited by a latch pin (14); When the latch (14) is pulled out, the push rod assembly moves away from the gear train (5) under the action of the rebound spring, and the parachute opener starts to work. After a predetermined time, the power spring (4) is released in time to pull the parachute bag sealing rope, and the sealing ball (7) on the steel cable is stuck in the waterproof rubber sleeve (8).

2. The waterproof structure of the steel cable and latch of the automatic parachute opener according to claim 1, characterized in that: The waterproof rubber sleeve (8) is provided with a V-shaped groove or a trumpet hole at one end to prevent the sealing ball (7) from being stuck when entering.

3. The waterproof structure of the steel cable and latch of the automatic parachute opener according to claim 1, characterized in that: The push rod assembly comprises an upper push rod (13) and a lower push rod (10) which are fixedly connected along the axial direction.

4. The waterproof structure of the steel cable and latch of the automatic parachute opener according to claim 3, characterized in that: The upper push rod (13) has an upper rubber pad (15), and the circumferential outer edge of the upper rubber pad (15) is fixed on the first step surface of the housing (1).

5. The waterproof structure of the steel cable and latch of the automatic parachute opener according to claim 4, characterized in that: The lower push rod (10) has a lower rubber pad (16), and the circumferential outer edge of the lower rubber pad (16) is fixed on the second step surface of the housing (1).

6. The waterproof structure of the steel cable and latch of the automatic parachute opener according to any one of claims 1 to 5, characterized in that: The locking rod (9) is hinged in the housing (1) at one end, and the outer side of the other end is in contact with the lower push rod (10).

7. The waterproof structure of the steel cable and latch of the automatic parachute opener according to claim 6, characterized in that: The clamping ring (11) is mounted on the housing 1, and an adjustable movable cover (12) is mounted on the outer end of the clamping ring (11). The movable cover (12) has a radial pin hole, and the tightness of the insertion of the pin can be controlled by adjusting the position of the movable cover (12).

8. The waterproof structure of the steel cable and latch of the automatic parachute opener according to claim 7, characterized in that: The outer end of the latch (14) is fixedly connected to the aircraft through a rope and is pulled out during ejection.

9. The waterproof structure of the steel cable and latch of the automatic parachute opener according to claim 8, characterized in that: When the latch (14) is pulled out, the gear train (5) starts to rotate under the impetus of the power spring (4), and generates periodic swings through the clock principle. After a predetermined time, the power spring (4) is released in time to output working power.

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