A locking recovery mechanism

Abstract

The present invention provides a locking and recovery mechanism, including a screw plug, a bolt, a shell, an air inlet, a screw cover, a reset lock head, a rod, a one-way lock joint, a locking lock head, a shell cavity, and an inner cylinder. The shell is in a ┣ shape, and its upper end connects the shell to the screw plug through a bolt. The screw plug is provided with a reset lock head, which limits the displacement of the rod under the action of a spring; the locking lock head is located in the middle, one end is connected to the screw cover, a second spring is inserted therein, and the other end and the one-way lock joint on the rod are pressed together, and the second spring pushes the locking lock head to move and achieve locking; an air inlet is provided between the shell and the head of the locking lock head, and the air inlet is connected with the shell cavity, and high-pressure gas enters through the air inlet from the gap between the shell cavity and the locking lock head, pushing the locking lock head to overcome the spring force of the second spring to release the lock on the rod. The present invention achieves locking through the one-way lock joint, and the gas drives the locking lock joint to unlock, while the inner cylinder drives the rod to achieve unlocking and recovery.

Description

Technical Field

[0001] The invention belongs to the field of aviation ejection lifesaving, is applied to the locking and recovery of a seat head and neck restraint device, and specifically relates to a locking and recovery mechanism. Background Art

[0002] After the pilot-chair system enters the high-speed airflow, the occupant's head bends forward and lowers under the action of the ejection overload, and then the head is lifted up and hits the headrest under the action of the high-speed airflow, causing the head and neck to be swung; the head and neck restraint device is lowered and locked during the ejection process, thereby filling the gap between the pilot's head and the headrest after lowering his head, reducing the collision space for the head to be swung backward. However, when the pilot-chair is separated, the head and neck restraint device will hook with the control belt, affecting the smooth separation of the pilot-chair.

[0003] Therefore, the problem existing in the prior art is that the locked state of the head and neck restraint device cannot be released, and the head and neck restraint device in the unlocked state cannot be forcibly retracted. Summary of the invention

[0004] Purpose of the present invention: The present invention proposes a locking and recovery mechanism, which can release the locking state of the head and neck restraint device and force it to be retracted to a certain angle.

[0005] The technical solution of the present invention is as follows: a locking and recovery mechanism, comprising a screw plug, a bolt, a shell, an air inlet, a screw cover, a reset lock, a rod, a one-way lock joint, a locking lock, an inner cavity of the shell and an inner cylinder, the shell is in the shape of ┣, and its upper end is connected to the shell and the screw plug by a bolt, and a reset lock is provided on the screw plug to limit the displacement of the rod under the action of a spring; the locking lock is located in the middle, one end is connected to the screw cover, a second spring is stuck therein, and the other end and the one-way lock joint on the rod are pressed against each other, and the second spring pushes the locking lock to move and realize locking; an air inlet is provided between the shell and the head of the locking lock, the air inlet is connected to the inner cavity of the shell, and the high-pressure gas enters through the air inlet from the gap between the inner cavity of the shell and the locking lock, pushing the locking lock to overcome the spring force of the second spring and release the lock of the rod.

[0006] In the above solution, a groove is provided at the top of the rod, and when the rod moves upward, the groove fits with the reset lock.

[0007] In the above solution, the one-way locking joint is an inclined surface, so that the rod is locked by the locking head only when it moves downward.

[0008] In the above solution, the locking and recovery mechanism also includes a sealing ring 1, and there are two sealing rings 1 located in the middle of the locking lock head.

[0009] In the above scheme, the locking and recovery mechanism also includes a second sealing ring, which is two in number and is spaced apart in the middle of the rod.

[0010] In the above solution, the distance between the two sealing rings 2 is greater than the diameter of the locking lock head installation hole.

[0011] In the above scheme, the intersection of the locking lock hole and the axial inner cavity of the shell is transitioned by an arc, so that the second sealing ring will not be sheared when passing through.

[0012] Beneficial effects of the present invention: The locking and recovery mechanism of the present invention cannot move in the reverse direction during the lowering process under the joint action of the one-way locking joint and the locking lock head. This process corresponds to the lowering and reverse locking of the head and neck restraint device to provide head support. When the separation system is working, the locking lock head compresses the spring under the push of gas to release the reverse lock on the pole, and at the same time, the gas pushes the inner cylinder to drive the pole to recover. The locking function is realized by the one-way locking joint, the gas drives the locking joint to unlock, and at the same time, the inner cylinder drives the pole to realize unlocking and recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the appearance structure of the locking and recovery mechanism of the present invention.

[0014] Figure 2 It is a cross-sectional view of the locking recovery mechanism of the present invention.

[0015] Figure 3 It is a schematic diagram of the recovery actuation process of the present invention.

[0016] Figure 4 It is a schematic diagram of the flow direction of the fuel gas during the recovery actuation process of the present invention.

[0017] Among them, 1-screw plug, 2-bolt, 3-shell, 3a-air inlet, 4-screw cover, 5-screw, 6-reset lock, 7-first spring, 8-rod, 8a-one-way lock joint, 9-sealing ring 1, 10 -second spring, 11-locking lock, 11a-shell cavity, 12-plug, 13-sealing ring 2, 14-inner cylinder. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] like Figure 1-4As shown, the locking and recovery mechanism of the present invention mainly includes: a screw plug 1, a bolt 2, a housing 3, an air inlet 3a, a screw cover 4, a reset lock head 6, a first spring 7, a rod 8, a one-way lock joint 8a, a second spring 10, a locking lock head 11, a housing inner cavity 11a, a plug 12 and an inner cylinder 14. The housing 3 is in the shape of ┣, and its upper end is connected to the screw plug 1 through a bolt 2, the middle part is connected to the screw cover 4, and the lower end is connected to the inner cylinder 14. The rod 8 is inserted into the inner cylinder 14 and placed together in the inner cavity of the housing 3. The end of the locking lock head 11 and the one-way lock joint on the rod 8 are pressed against each other, and the second spring ensures that the locking lock head 11 will not be unlocked in daily life. After the screw plug 1 and the housing 3 are plugged, they are locked by the bolt 2, and the reset lock head 6 is pressed into the corresponding groove of the rod 8 under the action of the first spring 7.

[0020] The initial position of the inner cylinder 14 is at the bottom of the inner cavity of the shell 3. In order to ensure air tightness during movement, a double sealing ring structure is adopted, using two sealing rings 13 respectively, the spacing between them is larger than the diameter of the installation hole of the locking lock head 11, and in order to protect the sealing ring 13 from damage during movement, a circular arc is used for transition at the place where the inner cavity diameter changes, so that the sealing ring 13 will not be sheared when passing. The rod 8 is inserted into the inner cylinder 14, and the top groove fits with the reset lock head 6. Under the action of the spring force of the second spring 13, the locking lock head 11 extends into the inner cavity 11a of the shell and presses against the one-way lock joint 8a on the rod 8. Similarly, in order to ensure the air tightness of the mechanism and the integrity of the sealing ring, the locking lock head 11 is also arranged with a double sealing ring structure of two sealing rings 19.

[0021] Working principle:

[0022] The locking function is designed to be realized as follows: during the lowering process, the one-way locking joint on the rod 8 will push the locking lock head 11 along the locking joint inclined surface under the action of external force to retract against the spring force, and when the reset lock head 6 passes the highest point of the locking joint, it will rebound into the groove under the action of the spring force. If the rod 8 moves in the opposite direction, the locking lock head 11 will extend toward the locking joint inclined surface under the action of the spring force until it is locked with the locking joint.

[0023] The recovery function is designed to be realized as follows: the high-pressure gas first enters from the cavity between the air inlet 3a on the shell 3 and the locking lock 11, pushing the locking lock 11 to overcome the spring force of the second spring 10 to unlock the rod 8. When the locking lock 11 passes over the seal ring 9 of the double seal ring set in the middle of the shell 3 and the gas passage opening on the shell 3, the gas enters the cavity between the inner cylinder 14 and the shell 3 through the gas passage, pushing the inner cylinder to move. After a certain rise, the step at the lower edge of the inner cylinder fits with the corresponding step on the rod, driving the rod to retract until it hits the reset lock 6.

Claims

1. A locking and recovery mechanism, comprising a screw plug (1), a bolt (2), a housing (3), an air inlet (3a), a screw cover (4), a reset lock head (6), a rod (8), a one-way lock joint (8a), a locking lock head (11), a housing inner cavity (11a) and an inner cylinder (14), characterized in that: The shell (3) is in the shape of a ┣, and the upper end thereof is connected to the shell (3) and the screw plug (1) by means of a bolt (2). The screw plug (1) is provided with a reset lock head (6) to limit the displacement of the rod (8) under the action of a spring (7); the locking lock head (11) is located in the middle, one end of which is connected to the screw cover (4), a second spring (10) is inserted therein, and the other end is pressed against a one-way lock joint (8a) on the rod (8), and the second spring (10) pushes the locking lock head (11) to move and achieve locking; an air inlet (3a) is provided between the shell (3) and the head of the locking lock head (11), the air inlet (3a) is connected to the inner cavity of the shell, and high-pressure gas enters through the air inlet (3a) from the gap between the inner cavity of the shell and the locking lock head (11), pushing the locking lock head (11) to overcome the spring force of the second spring (10) and release the locking of the rod (8).

2. A locking and recovery mechanism according to claim 1, characterized in that: The top of the rod (8) is provided with a groove, and when the rod (8) moves upward, the groove fits with the reset lock head (6).

3. A locking and recovery mechanism according to claim 1, characterized in that: The one-way locking joint (8a) is an inclined surface, so that the rod (8) is locked by the locking head (11) only when it moves downward.

4. A locking and recovery mechanism according to claim 1, characterized in that: The locking and recovery mechanism also includes a sealing ring (9), wherein the sealing ring (9) is two and is arranged at intervals in the middle of the locking lock head (11).

5. A locking and recovery mechanism according to claim 1, characterized in that: The locking and recovering mechanism also includes a second sealing ring (13), which is in the form of two sealing rings (13) arranged at intervals in the middle of the rod (8).

6. A locking and recovery mechanism according to claim 5, characterized in that: The distance between the two sealing rings (13) is greater than the diameter of the mounting hole of the locking head (11).

7. A locking and recovery mechanism according to claim 6, characterized in that: An arc transition is provided at the intersection of the inner cavity of the locking lock head (11) and the axial inner cavity of the housing (3) so that the second sealing ring (13) will not be sheared when passing through.

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