Seat safety hanger for aircraft production

Abstract

The application provides a seat safety lifting hook for aircraft production, and relates to the technical field of seat lifting hooks. The seat safety lifting hook for aircraft production comprises a lifting hook body, a first sleeve and a blocking rod. The first sleeve is arranged on a traction chain, the lifting hook body is arranged at the lower end of the first sleeve, and the blocking rod is arranged at the bottom end of the lifting hook body in an inclined downward manner. When the lifting hook body is loaded or unloaded, the lifting hook body moves vertically downward or upward relative to the first sleeve, so that the blocking rod reciprocates and extends relative to the lifting hook body in an inclined downward manner. When the lifting hook body moves at a constant speed or accelerates in the loaded state, the blocking rod is adapted to extend and limit the load. The application triggers the extension of the blocking rod by the load of the lifting hook body, so that the aircraft seat is limited to one side of the movement direction. When the lifting hook body moves at a constant speed or accelerates, the blocking rod is adapted to extend and keep the seat limited during the deflection process, so that the production efficiency is improved, the seat is prevented from swinging back and forth during transportation, and the seat is protected from being damaged by knocking.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of seat lifting hook, in particular to a seat safety lifting hook for aircraft production. BACKGROUND

[0002] The safety lifting hook in aircraft seat production is a special tool for hanging and transporting seats on the assembly line, which is connected with the fixed point on the seat through the hole to ensure the stability of the seat during movement and prevent it from falling off, and is a key component to ensure safety and efficiency in the production process.

[0003] The hook for hanging aircraft seats in production is mainly transported by a suspension conveyor, the traction member of which is composed of a punched detachable chain or a die-forged detachable chain and a sliding frame, and the hook is directly connected with the sliding frame on the traction chain.

[0004] However, in actual production process, in order to avoid damage caused by shaking of aircraft seats during transportation, the suspension conveyor generally runs at low speed, which affects the production efficiency. SUMMARY

[0005] The present application relates to the technical field of seat lifting hook, in particular to a seat safety lifting hook for aircraft production.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0007] A seat safety lifting hook for aircraft production, comprising a lifting hook body, a first sleeve and a stop rod, the first sleeve is arranged on the traction chain, the lifting hook body is arranged at the lower end of the first sleeve, and the stop rod is arranged obliquely downward at the bottom end of the lifting hook body.

[0008] Preferably, the bottom end of the hook body is fixedly connected with a second sleeve which is inclined downward, a second piston plate is slidably connected to the inner surface of the second sleeve, a stop rod is fixedly connected to the middle part of the second piston plate, a second spring is sleeved outside the stop rod, the two ends of the second spring are fixedly connected to the end surface of the second piston plate and the inner bottom surface of the second sleeve, the gap between the stop rod and the hole in the end part of the second sleeve is in clearance fit, the space formed by the second piston plate away from the stop rod and the inner wall of the second sleeve is a first space, a first hose is fixedly communicated with the end part of the first space, the end of the first hose away from the second sleeve is fixedly communicated with the bottom end of the first sleeve, the first sleeve, the first hose and the first space are filled with hydraulic oil, when the hook body moves vertically downward relative to the first sleeve, the hydraulic oil in the first sleeve is transported into the first space through the first hose.

[0009] Preferably, the inner surface of the first sleeve is slidably connected with a first piston plate, a telescopic rod is fixedly arranged at the middle part of the bottom end of the first piston plate, the hook body is arranged at the bottom end of the telescopic rod, the telescopic rod is slidably connected with the middle part of the bottom end of the first sleeve, a first spring is sleeved outside the telescopic rod, the two ends of the first spring are fixedly connected between the bottom end of the first piston plate and the inner bottom surface of the first sleeve, the space formed by the bottom end of the first piston plate and the inner wall of the first sleeve is a second space, the second space is filled with hydraulic oil, and a gas hole is arranged at the upper end of the side wall of the first sleeve.

[0010] Preferably, the inner side of the hook body is inclined to arrange a limiting rod, when the hook body reciprocatingly moves vertically relative to the first sleeve, the limiting rod is driven to reciprocatingly move obliquely downward.

[0011] Preferably, the inner side of the hook body is inclined to arrange a limiting rod, when the hook body reciprocatingly moves vertically relative to the first sleeve, the limiting rod is driven to reciprocatingly move obliquely downward.

[0012] Preferably, the end part of the third space is fixedly communicated with a second hose, and the end of the second hose away from the third sleeve is fixedly communicated with the side wall of the first hose.

[0013] Preferably, a fixed pipe is fixedly communicated between the second sleeve and the first hose, and an electromagnetic valve is fixedly installed on the fixed pipe.

[0014] Preferably, a non-slip pad is sleeved outside the end of the stop rod away from the second sleeve.

[0015] Preferably, the upper end of the first sleeve is fixedly connected to the bottom end of the slide on the traction chain.

[0016] Preferably, the telescopic rod has a rectangular groove inside, and a rectangular rod is slidably connected to the inner surface of the rectangular groove. The side of the rectangular rod has a plurality of evenly distributed positioning holes perpendicularly. An L-shaped plate is fixed to the lower outer end of the telescopic rod. A bolt is threaded inside the L-shaped plate. The bolt is threaded to the positioning holes. The bottom end of the rectangular rod is fixed to the upper end of the hook body.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the load triggering stop bar of the hook body extends downward relative to the hook body and abuts against the surface of the aircraft seat, so that the side of the aircraft seat facing the direction of movement is limited. During the acceleration and uniform movement phases of the suspended conveyor, the stop bar adaptively extends during the deflection of the seat and always keeps the side of the aircraft seat facing the direction of movement limited. This improves production efficiency while ensuring that the seat does not swing back and forth during transportation and protects the seat from impact damage. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the seat safety hook used in aircraft production according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic cross-sectional view of the seat safety hook used in aircraft production according to an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the unloaded state of the hook body 100 in the seat safety hook used in aircraft production according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the load state structure of the hook body 100 in the seat safety hook used in aircraft production according to an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the hook body 100 in a static state in the seat safety hook used in aircraft production according to an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of the hook body 100 in the accelerated motion state of the seat safety hook used in aircraft production according to an embodiment of the present invention;

[0024] Figure 7 for Figure 2 Enlarged view of the structure at point A in the image;

[0025] Figure 8 for Figure 2 Enlarged view of the structure at point B in the image;

[0026] Figure 9 This is a schematic diagram of the internal structure of the telescopic rod in the seat safety hook used in aircraft production according to an embodiment of the present invention.

[0027] In the diagram: 100, hook body; 200, first sleeve; 201, first piston plate; 202, telescopic rod; 203, first spring; 204, air hole; 300, second sleeve; 301, second piston plate; 302, stop rod; 303, second spring; 400, third sleeve; 401, third piston plate; 402, limit rod; 403, third spring; 500, first flexible hose; 501, second flexible hose; 502, fixing pipe; 503, solenoid valve; 600, rectangular groove; 601, rectangular rod; 602, positioning hole; 603, L-shaped plate; 604, bolt. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] The terms used in this invention, such as "upper," "lower," "left," "right," "middle," and "one," are merely for clarity of description and are not intended to limit the scope of the invention. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0030] like Figures 1-9 As shown, this embodiment of the invention provides a seat safety hook for aircraft production, including a hook body 100, a first sleeve 200, and a stop bar 302. The first sleeve 200 is disposed on a traction chain, the hook body 100 is disposed at the lower end of the first sleeve 200, and the stop bar 302 is disposed obliquely downward at the bottom end of the hook body 100. When the hook body 100 is loaded or unloaded, the hook body 100 moves vertically downward or upward relative to the first sleeve 200, so that the stop bar 302 reciprocates obliquely downward relative to the hook body 100. When the hook body 100 is running at a constant speed or accelerating under load, the stop bar 302 extends adaptively and limits the load.

[0031] In this embodiment, the aircraft seat needs to be hung and transported during the production process of the aircraft, the seat is hung on the hook body 100 through the hole on the seat, at this time the hook body 100 moves vertically downward relative to the first sleeve 200 due to the weight, so that the stop lever 302 extends obliquely downward relative to the hook body 100 at this time, the extended stop lever 302 abuts on the surface of the aircraft seat, so that the side of the aircraft seat facing the movement direction is limited, at this time the suspension conveyor starts to accelerate and then moves uniformly, in the acceleration stage, the center of mass of the aircraft seat has a tendency to maintain the original speed due to inertia, and the lifting point of the hook body 100 has moved forward with the acceleration of the hook body 100, the speed difference between the center of mass and the lifting point forms a moment that makes the seat rotate backward, causing the seat to deflect in the opposite direction of the movement direction, the stop lever 302 extends and abuts on the surface of the aircraft seat at the same time during the deflection of the seat, and the side of the aircraft seat facing the movement direction is always limited, in the uniform motion stage, the speed of the center of mass and the lifting point is consistent, the seat no longer deflects, when the suspension conveyor stops, the process is the deceleration stage, at this time the seat deflects in the same direction as the movement direction, but due to the limitation of the stop lever 302, the seat cannot deflect at this time until it returns to the static state, during the entire conveying process, the seat deflects slowly and is limited by the stop lever 302 at the same time, then the seat is always limited by the stop lever 302 and cannot deflect during the process of decelerating to the static state, which improves the production efficiency and also ensures that the seat does not swing back and forth during transportation, protecting the seat from being damaged by knocking.

[0032] The stop lever 302 extends obliquely downward relative to the hook body 100 and abuts on the surface of the aircraft seat by the load of the hook body 100, so that the side of the aircraft seat facing the movement direction is limited, during the acceleration and uniform motion stages of the suspension conveyor, the stop lever 302 extends and always keeps the side of the aircraft seat facing the movement direction limited during the deflection of the seat, which improves the production efficiency and also ensures that the seat does not swing back and forth during transportation, protecting the seat from being damaged by knocking.

[0033] As Figures 3-6As shown, the bottom end of the hook body 100 is fixedly connected with a second sleeve 300 which is inclined downward, the inner surface of the second sleeve 300 is slidably connected with a second piston plate 301, the middle part of the second piston plate 301 is fixedly connected with a blocking rod 302, the outer side of the blocking rod 302 is sleeved with a second spring 303, the two ends of the second spring 303 are fixedly connected to the end face of the second piston plate 301 and the inner bottom surface of the second sleeve 300, the blocking rod 302 is in clearance fit with the hole in the middle of the end of the second sleeve 300, the space surrounded by the second piston plate 301 away from the blocking rod 302 and the inner wall of the second sleeve 300 is a first space, the end of the first space is fixedly connected with a first hose 500, the end of the first hose 500 away from the second sleeve 300 is fixedly connected to the bottom end of the first sleeve 200, the first sleeve 200, the first hose 500 and the first space are filled with hydraulic oil, when the hook body 100 moves vertically downward relative to the first sleeve 200, the hydraulic oil in the first sleeve 200 is transported into the first space through the first hose 500.

[0034] In this embodiment, the second piston plate 301 is slidably attached to the inner surface of the second sleeve 300, and the second spring 303 is connected between the second piston plate 301 and the inner bottom surface of the second sleeve 300, which ensures that the second piston plate 301 can move linearly along the axis direction reciprocatingly and in close contact with the inner surface of the second sleeve 300, thereby driving the blocking rod 302 to move linearly along the axis direction reciprocatingly relative to the second sleeve 300, when the hook body 100 is loaded, at this time the hook body 100 moves vertically downward relative to the first sleeve 200, driving the hydraulic oil in the first sleeve 200 to be transported into the first space through the first hose 500, because the hydraulic oil in the first space increases, the second piston plate 301 is inclined to move downward and compresses the second spring 303, at this time the blocking rod 302 extends outward and abuts against the surface of the seat, when the hook body 100 accelerates, the seat will deflect away from the movement direction (for example Figure 5 and Figure 6 As shown, the arrow direction is the movement direction), at this time the seat will move away from the blocking rod 302, but because the hook body 100 is loaded, at this time the hook body 100 continues to move downward relative to the first sleeve 200, driving the hydraulic oil in the first sleeve 200 to continue to be supplemented into the first space (for example Figure 3 and Figure 4As shown, the arrow direction is the moving direction), the stop bar 302 is continuously inclined to move downward by the second piston plate 301, so that the stop bar 302 re-contacts on the seat surface, that is, during the deflection of the seat, the stop bar 302 always extends and limits the seat surface, when the hook body 100 slows down to stop, the seat is always limited by the stop bar 302 and does not deflect, which improves the production efficiency and also ensures that the seat does not swing back and forth during transportation, and protects the seat from being damaged by knocking; when the hook body 100 is unloaded, the second spring 303 restores the deformation to push the second piston plate 301 to reset, so that the excess hydraulic oil in the first space returns to the first sleeve 200, and here the gap between the stop bar 302 and the second sleeve 300 facilitates the air inlet and outlet of the space where the second spring 303 is located, and the structure rationality is ensured.

[0035] As shown in the figure, Figure 2 With Figure 4 As shown, the first piston plate 201 is slidably connected to the inner surface of the first sleeve 200, the telescopic rod 202 is fixedly arranged at the middle of the bottom end of the first piston plate 201, the hook body 100 is arranged at the bottom end of the telescopic rod 202, the telescopic rod 202 is slidably connected to the middle of the bottom end of the first sleeve 200, the first spring 203 is sleeved outside the telescopic rod 202, the two ends of the first spring 203 are tightly connected between the bottom end of the first piston plate 201 and the inner bottom surface of the first sleeve 200, the space surrounded by the bottom end of the first piston plate 201 and the inner wall of the first sleeve 200 is a second space, the second space is filled with hydraulic oil, and the air hole 204 is arranged at the upper end of the side wall of the first sleeve 200.

[0036] In this embodiment, the first piston plate 201 is slidably arranged on the inner surface of the first sleeve 200, and the first spring 203 is connected between the first piston plate 201 and the inner bottom surface of the first sleeve 200, so that the first piston plate 201 drives the hook body 100 at the bottom end of the telescopic rod 202 to vertically move along the axis direction, when the hook body 100 is loaded, the first piston plate 201 moves downward relative to the first sleeve 200, and the first piston plate 201 extrudes the hydraulic oil in the second space when moving downward, so that the hydraulic oil enters the first space through the first hose 500, when the hook body 100 accelerates, the stop bar 302 does not contact the deflected seat, at this time, the second space continues to deliver hydraulic oil outward under the gravity of the seat, so that the stop bar 302 continues to extend and abuts against the seat, so that the stop bar 302 self-adapts to abut against and limit the seat surface, when the hook body 100 is unloaded, the first piston plate 201 moves upward to reset under the pushing of the first spring 203 recovering deformation, and the hydraulic oil in the first space enters the second space to recover, and here the air hole 204 is designed to ensure that the space at the upper end of the first piston plate 201 can intake and exhaust air, and the structure rationality is ensured.

[0037] As Figure 1 shown, optionally, a limiting rod 402 is obliquely arranged inside the hook body 100, and the limiting rod 402 is driven to obliquely and reciprocatingly move downward when the hook body 100 vertically reciprocatingly moves relative to the first sleeve 200.

[0038] In this embodiment, when the hook body 100 is loaded, at this time, the hook body 100 moves downward relative to the first sleeve 200, the limiting rod 402 is driven to obliquely extend downward, and the bottom end of the limiting rod 402 abuts against the hook portion of the hook body 100, at this time, the open end of the hook body 100 is blocked, so that the seat cannot slip off during transportation, and the seat is further protected by this structure to avoid unhooking.

[0039] As Figures 2-8 shown, optionally, a third sleeve 400 is obliquely and fixedly arranged at the upper end of the hook body 100, a third piston plate 401 is slidingly connected to the inner surface of the third sleeve 400, a limiting rod 402 is fixedly arranged at the middle portion of the third piston plate 401, a third spring 403 is sleeved on the outer side of the limiting rod 402, the third spring 403 is tightly connected between the end face of the third piston plate 401 and the inner bottom surface of the third sleeve 400, the limiting rod 402 and the end portion of the third sleeve 400 are gap-fitted, the space formed by the third piston plate 401 away from the limiting rod 402 and surrounded by the third sleeve 400 is a third space, the third space is filled with hydraulic oil, and the hydraulic oil in the third space is driven to decrease or increase when the hook body 100 vertically moves relative to the first sleeve 200.

[0040] In this embodiment, the third piston plate 401 is slidingly attached to the inner surface of the third sleeve 400, and the third spring 403 is connected between the third piston plate 401 and the inner bottom surface of the third sleeve 400, so that the third piston plate 401 drives the limiting rod 402 to reciprocatingly move along the axial direction, the hydraulic oil in the third space is driven to decrease or increase when the hook body 100 vertically moves relative to the first sleeve 200, the limiting rod 402 is pushed to obliquely move downward to block the open end of the hook body 100 when the hydraulic oil in the third space increases, and the limiting rod 402 is reset under the pushing of the third spring 403 recovering deformation when the hydraulic oil in the third space decreases, at this time, the open end of the hook body 100 is opened, and the seat can be taken out.

[0041] As Figures 2-4 shown, optionally, a second hose 501 is fixedly and communicatively connected to the side wall of the first hose 500 at the end away from the third sleeve 400.

[0042] In this embodiment, the hydraulic oil in the second space is compressed into the first hose 500, then into the second hose 501, and finally into the third space, so that the hydraulic oil in the third space increases, pushing the limiting rod 402 to extend outward. When the hydraulic oil in the third space decreases, the decreased hydraulic oil reenters the second space.

[0043] As shown in Figure 4 Optionally, a fixed pipe 502 is fixedly connected between the second sleeve 300 and the first hose 500, and an electromagnetic valve 503 is fixedly installed on the fixed pipe 502.

[0044] In this embodiment, first, the electromagnetic valve 503 is controlled to close the inside of the fixed pipe 502, and then the hook body 100 is loaded. At this time, the hydraulic oil in the second space cannot enter the first space, but only enters the third space, so that the limiting rod 402 extends outward to close the open end of the hook body 100. Then the electromagnetic valve 503 is opened, and at this time the hydraulic oil in the second space enters the first space to push the blocking rod 302 to extend outward. By controlling the opening and closing of the electromagnetic valve 503, the seat movable area is first limited to avoid slipping, and then the seat surface is limited to avoid shaking.

[0045] As shown in Figure 1 Optionally, a non-slip pad is sleeved on the outer surface of the end of the blocking rod 302 away from the second sleeve 300.

[0046] In this embodiment, the non-slip pad is sleeved on the outer surface of the blocking rod 302 to improve the non-slip performance and thus improve the stability of the blocking rod 302 abutting against the seat surface, and protect the seat surface from scratches.

[0047] As shown in Figure 1 Optionally, the upper end of the first sleeve 200 is fixedly connected to the bottom end of the traction chain upper carriage.

[0048] In this embodiment, the traction chain moves to drive the carriage to move, and then drives the first sleeve 200 to move. Since the specific structure and working principle of the suspension conveyor are prior art, they will not be described here.

[0049] As shown in Figure 9 Optionally, a rectangular groove 600 is formed in the inside of the telescopic rod 202, a rectangular rod 601 is slidably connected to the inner surface of the rectangular groove 600, a plurality of evenly distributed positioning holes 602 are vertically formed in the side surface of the rectangular rod 601, an L-shaped plate 603 is fixedly arranged on the lower end of the outside of the telescopic rod 202, a bolt 604 is threadedly connected to the inside of the L-shaped plate 603, the bolt 604 and the positioning hole 602 are threadedly connected to each other, and the bottom end of the rectangular rod 601 is fixedly connected to the upper end of the hook body 100.

[0050] In the embodiment, the rectangular rod 601 is vertically lifted along the path of the rectangular groove 600, and then the hook body 100 is vertically lifted relative to the telescopic rod 202. When the hook body 100 is not mounted on the seat, the rectangular rod 601 is slid upward or downward to adjust the position of the hook body 100 relative to the first piston plate 201. After the position is adjusted, the bolt 604 is rotated and screwed in the corresponding positioning hole 602. At this time, the position of the hook body 100 relative to the first piston plate 201 is fixed, thereby adjusting the distance between the hook body 100 and the first sleeve 200. When hoisting a lower seat, the distance between the hook body 100 and the first sleeve 200 can be adjusted to be larger. In this way, the hook body 100 is relatively close to the ground, which is convenient for placing the seat on the hook body 100 or taking the seat out of the hook body 100, saves labor, and does not affect the conveying of the hook body 100. When hoisting a higher seat, the distance between the hook body 100 and the first sleeve 200 can be adjusted to be smaller. In this way, the hook body 100 is relatively far from the ground, so that the seat has enough space for conveying.

[0051] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can make equivalent replacements or changes to the technical solution and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A seat safety hanger for aircraft production, characterized in that The utility model provides a hook body (100), first sleeve (200) and baffle rod (302) are included, first sleeve (200) is located on the traction chain, the hook body (100) is arranged at the lower end of first sleeve (200), the baffle rod (302) is arranged on the bottom end of hook body (100) and is inclined downward, when the hook body (100) is loaded or unloaded, the hook body (100) moves vertically downward or upward relative to first sleeve (200), so that the baffle rod (302) reciprocates and extends and contracts relative to the hook body (100) and is inclined downward, when the hook body (100) runs at a uniform speed or acceleration in the loaded state, the baffle rod (302) is adapted to extend and limit the load, The bottom end of the hook body (100) is fixedly connected with a second sleeve (300) inclined downward, the inner surface of the second sleeve (300) is slidably connected with a second piston plate (301), the middle part of the second piston plate (301) is fixedly connected with the baffle rod (302), the outer side of the baffle rod (302) is sleeved with a second spring (303), the two ends of the second spring (303) are fixedly connected to the end surface of the second piston plate (301) and the inner bottom surface of the second sleeve (300), the hole in the middle of the baffle rod (302) and the end part of the second sleeve (300) is clearance fit, the space surrounded by the second piston plate (301) away from the baffle rod (302) and the inner wall of the second sleeve (300) is a first space, the end part of the first space is fixedly connected with a first hose (500), the end of the first hose (500) away from the second sleeve (300) is fixedly connected to the bottom end of the first sleeve (200), the first sleeve (200), the first hose (500) and the first space are filled with hydraulic oil, when the hook body (100) moves vertically downward relative to the first sleeve (200), the hydraulic oil in the first sleeve (200) is transported to the first space through the first hose (500).

2. A seat safety hanger for aircraft production according to claim 1, characterized in that, The inner surface of the first sleeve (200) is slidably connected with a first piston plate (201), the bottom end of the first piston plate (201) is fixedly provided with a telescopic rod (202), the bottom end of the telescopic rod (202) is provided with the hook body (100), the telescopic rod (202) is slidably connected with the middle part of the bottom end of the first sleeve (200), the outer side of the telescopic rod (202) is sleeved with a first spring (203), the two ends of the first spring (203) are fixedly connected between the bottom end of the first piston plate (201) and the inner bottom surface of the first sleeve (200), the space surrounded by the bottom end of the first piston plate (201) and the inner wall of the first sleeve (200) is a second space, the second space is filled with hydraulic oil, and a gas hole (204) is formed in the sidewall of the first sleeve (200).

3. The seat safety hanger for aircraft production of claim 1, wherein, The inner side of the hook body (100) is inclinedly provided with a limiting rod (402), when the hook body (100) reciprocatingly and vertically moves relative to the first sleeve (200), the limiting rod (402) is driven to reciprocatingly and extendably and contractably move downwardly and obliquely.

4. The seat safety hanger for aircraft production of claim 1, wherein, The third sleeve (400) is internally and obliquely arranged on the upper end of the hook body (100), the third piston plate (401) is slidably connected to the inner surface of the third sleeve (400), the limiting rod (402) is fixedly arranged on the middle portion of the third piston plate (401), the third spring (403) is arranged on the outer side of the limiting rod (402), the third spring (403) is fixedly connected between the end surface of the third piston plate (401) and the inner bottom surface of the third sleeve (400), the limiting rod (402) and the third sleeve (400) are in clearance fit, the third space is formed between the third piston plate (401) and the third sleeve (400), the third space is filled with hydraulic oil, and the hydraulic oil in the third space is reduced or increased when the hook body (100) vertically ascends or descends relative to the first sleeve (200).

5. A seat safety hanger for aircraft production according to claim 4, characterized in that, The second hose (501) is fixedly connected to the side wall of the first hose (500) and away from the third sleeve (400).

6. The seat safety hanger for aircraft production of claim 1, wherein, The fixed pipe (502) is fixedly connected between the second sleeve (300) and the first hose (500), and the electromagnetic valve (503) is fixedly installed on the fixed pipe (502).

7. The seat safety hanger for aircraft production of claim 1, wherein, The anti-skid pad is arranged on the outer surface of the end of the blocking rod (302) and away from the second sleeve (300).

8. The seat safety hanger for aircraft production of claim 1, wherein, The upper end of the first sleeve (200) is fixedly connected to the bottom end of the traction chain upper carriage.

9. A seat safety hanger for aircraft production according to claim 2, characterized in that, The rectangular groove (600) is arranged in the inner portion of the telescopic rod (202), the rectangular rod (601) is slidably connected to the inner surface of the rectangular groove (600), a plurality of positioning holes (602) are vertically arranged on the side surface of the rectangular rod (601), the L-shaped plate (603) is fixedly arranged on the outer lower end of the telescopic rod (202), the bolt (604) is threadedly connected to the inner portion of the L-shaped plate (603), the bolt (604) is threadedly connected with the positioning hole (602), and the bottom end of the rectangular rod (601) is fixedly connected with the upper end of the hook body (100).

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