Novel general airplane chair back adjustable driving seat

By employing a mechanical adjustment arm and hydraulic cylinder system in the general aviation aircraft pilot seat, the problem of limited cockpit space in general aviation aircraft is solved, improving pilot comfort and reducing seat weight.

CN223878204UActive Publication Date: 2026-02-06ZHEJIANG WANFENG ENGINE MFG CO LTD
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Patent Information

Application Number
CN202520574933.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-31
Publication Date
2026-02-06
Estimated Expiration
2035-03-31

AI Technical Summary

Technical Problem

The cockpit and cabin space of general aviation aircraft are limited, and fixed pilot seats cannot perfectly fit every pilot. Long-term flight can easily cause fatigue, and manually adjusting the seat back is troublesome.

Method used

A novel general-purpose aircraft seat with an adjustable backrest is designed, employing a mechanical adjustment arm and a hydraulic cylinder system. The backrest angle is adjusted via hydraulic control. The design incorporates carbon fiber and glass fiber composite materials to improve strength and reduce weight. The backrest adjustment button controls the hydraulic system for automatic positioning.

Benefits of technology

It enables convenient angle adjustment of the seat back, improving flight comfort, and reduces the hassle of manual operation through automatic positioning.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

The utility model relates to a novel general airplane chair back adjustable driving seat which comprises a chair back and a chair basin of the seat, armrests are fixed on two sides of the chair basin, cavities are arranged on two sides of the chair back, mechanical adjusting arms are arranged in the cavities and comprise movable arm frames fixedly connected in the chair back, the lower ends of the movable arm frames extend out of the chair back and are connected with hinge shafts in an inserted mode, and the hinge shafts are connected with the movable arm frames in an inserted mode. Fixed arm frames are hinged to the fixed arm frames through hinge shafts, and the fixed arm frames are fixedly connected to the outer walls of the two sides of the chair basin respectively; an inclined hydraulic cylinder is arranged on one side of the movable arm frame, a notch is formed in the bottom of a cylinder body of the hydraulic cylinder, a hinged support lug is inserted into the notch, and the hinged support lug is formed on a hinged seat and is hinged with the cylinder body of the hydraulic cylinder through a hinged hole bolt; a rotating shaft is fixedly inserted into a piston rod of the hydraulic cylinder, one end of the rotating shaft abuts against the fixed arm frame and is fixedly connected with a screw, and the screw is inserted into the movable arm frame. The angle of the seat back of the driving seat can be adjusted, adjustment is convenient, and the comfort degree of flight driving can be improved.
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Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of aircraft seat, more particularly to a new type general aircraft chair back adjustable pilot seat. BACKGROUND

[0002] The general aircraft cockpit and cabin space are limited, generally using fixed pilot seat, thus leading to that the pilot seat cannot perfectly adapt to each pilot, and long time flight driving is prone to fatigue. It is required to design corresponding structure to improve the comfort of flight driving, for example, the pilot seat can be divided into two parts of seat bowl and chair back, and the seat bowl and chair back can be hinged together. Then, adjusting structure is arranged to realize the adjustment of the chair back, but the manual adjustment positioning mode is not required. As mentioned above, the general aircraft cockpit and cabin space are limited, and it is troublesome to manually adjust and position the seat back. Therefore, it is required to design a kind of seat back angle adjustment convenient seat. UTILITY MODEL CONTENTS

[0003] The utility model discloses a new type general aircraft chair back adjustable pilot seat, which can adjust the angle of the chair back of the pilot seat, is convenient to adjust, and can improve the comfort of flight driving.

[0004] A new type general aircraft chair back adjustable pilot seat, which comprises a chair back and a seat bowl of a seat, and the seat bowl is fixedly connected with armrests on both sides. The chair back is provided with a cavity on both sides, and a mechanical adjusting arm is arranged in the cavity. The mechanical adjusting arm comprises a movable arm frame fixed in the chair back, a hinge shaft inserted and connected at the lower end of the movable arm frame, and a fixed arm frame hinged to the movable arm frame through the hinge shaft and fixed on the outer walls of the seat bowl on both sides.

[0005] One side of the movable arm frame is provided with an inclined hydraulic cylinder. A notch is formed at the bottom of the cylinder body of the hydraulic cylinder. A hinge lug is inserted into the notch. The hinge lug is formed on a hinge seat and hinged together with the cylinder body of the hydraulic cylinder through a hinge hole bolt. The hinge seat is fixed on the fixed arm frame. A rotating shaft is inserted and fixed on the piston rod of the hydraulic cylinder. One end of the rotating shaft abuts against the fixed arm frame and is fixed with a screw. The screw is inserted into the movable arm frame.

[0006] The top of the hydraulic cylinder is provided with a top pin connected with the inner cavity of the hydraulic cylinder. The top pin is provided with a hydraulic oil channel separated from the inner cavity of the hydraulic cylinder. The hydraulic oil channel is connected with a hydraulic oil tank through an oil pipe. The armrests are fixed with a chair back adjusting button. The chair back adjusting button controls the movement of the top pin in the piston rod of the hydraulic cylinder through a cable. The top pin is pressed into the piston rod to realize the communication of the inner cavity of the hydraulic cylinder and the hydraulic oil tank.

[0007] Preferably, the fixed arm frame and the movable arm frame are made of sheet metal, the fixed arm frame is formed with a plurality of lower mounting holes, the movable arm frame is formed with a plurality of upper mounting holes, bolts are inserted into the upper mounting holes and the lower mounting holes, and the bolts are screwed on the backrest and the seat pan respectively.

[0008] Preferably, one end of the hinge shaft is formed with a limiting head, the limiting head abuts against the movable arm frame, and the other end of the hinge shaft extends out of the fixed arm frame and is screwed with a limiting nut.

[0009] Preferably, the piston rod of the hydraulic cylinder is formed with a central hole which is in communication with an inner cavity of the piston rod, the inner wall of the central hole at the end of the piston rod is formed with a ring groove with a rectangular cross section, and the end face of the piston rod around the central hole is formed with an external thread sleeve.

[0010] The hydraulic oil passage of the plunger pin includes a vertical hole which penetrates the upper end face of the plunger pin, the outer wall of the plunger pin at the central hole is formed with a horizontal hole which is in communication with the vertical hole, a lower sealing ring is inserted and fixed on the inner wall of the central hole at the lower side of the horizontal hole and abuts against the outer wall of the plunger pin.

[0011] The lower end of the plunger pin is inserted into the ring groove of the piston rod and is formed with an adapter column, a compression spring is inserted into the adapter column, and the upper and lower ends of the compression spring abut against the plunger pin and the piston rod respectively, the upper end of the plunger pin extends out of the piston rod and is sleeved with a limiting cap sleeve, the limiting cap sleeve is screwed and fixed on the external thread sleeve of the piston rod, and the outer wall of the plunger pin is formed with a limiting stop ring which is inserted into the limiting cap sleeve and abuts against the inner end face of the upper part of the limiting cap sleeve.

[0012] Preferably, the distance between the lower end face of the ring groove of the piston rod and the lower end face of the adapter column is greater than the distance from the limiting stop ring to the upper end face of the piston rod, and the distance from the limiting stop ring to the upper end face of the piston rod is greater than the distance from the upper end face of the ring groove to the horizontal hole.

[0013] Preferably, the outer wall of the lower part of the plunger pin is formed with an oil passage groove which is in communication with the horizontal hole and is annular.

[0014] Preferably, the upper end of the plunger pin extends out of the limiting cap sleeve and is sleeved with an adapter sleeve, the lower part of the adapter sleeve is inserted into and fixed on the limiting cap sleeve, the outer wall of the upper part of the plunger pin abuts against the inner wall of the middle and upper parts of the adapter sleeve, the vertical hole of the plunger pin is inserted and fixed with an oil passage connector, the upper part of the adapter sleeve is inserted into the oil passage connector and abuts against the outer wall of the oil passage connector, an oil pipe connector is screwed and fixed on one side of the adapter sleeve of the oil passage connector, and a pressurized oil pipe is screwed on the oil pipe connector.

[0015] The driving seat has the advantages that:

[0016] The backrest of the driving seat can be adjusted in angle, the adjustment is convenient, and the comfort of flight driving is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is the three-dimensional structure schematic view of the utility model;

[0018] Fig. 2 It is the three-dimensional structure schematic view of the utility model's inner mechanical adjusting arm;

[0019] Fig. 3 It is the sectional view schematic view of the utility model's hydraulic cylinder head.

[0020] In the drawing: 1, chair back; 2, chair basin; 3, armrest; 4, mechanical adjusting arm; 5, chair back adjusting button; 6, connecting sleeve; 7, oil connection pipe; 8, oil pipe joint; 9, lower sealing ring; 10, upper sealing ring. Specific implementation:

[0021] Embodiment: see Figs. 1 to 3 As shown in the figure, a new type of general aircraft chair back adjustable pilot seat, including the chair back 1 and the chair basin 2 of the seat, the chair basin 2 is fixedly connected with the armrest 3 on both sides, the chair back 1 is provided with a cavity 11 on both sides, the cavity 11 is provided with a mechanical adjusting arm 4, the mechanical adjusting arm 4 includes a movable arm frame 41 fixedly connected in the chair back 1, the lower end of the movable arm frame 41 extends out of the chair back 1 and is connected with a hinge shaft 43, the movable arm frame 41 is hinged with a fixed arm frame 42 through the hinge shaft 43, and the fixed arm frame 42 is fixedly connected to the outer wall on both sides of the chair basin 2 respectively;

[0022] One side of the movable arm frame 41 is provided with a hydraulic cylinder 44 arranged obliquely, the bottom of the cylinder body of the hydraulic cylinder 44 is formed with a notch, the notch is inserted with a hinge lug 451, the hinge lug 451 is formed on a hinge seat 45 and is hinged together with the cylinder body of the hydraulic cylinder 44 through hinge hole bolts 47; the hinge seat 45 is fixedly connected to the fixed arm frame 42; a rotating shaft 46 is inserted and fixed on the piston rod 441 of the hydraulic cylinder 44, one end of the rotating shaft 46 abuts against the fixed arm frame 41 and is fixedly connected with a screw 48, and the screw 48 is inserted in the movable arm frame 41;

[0023] The top of the hydraulic cylinder 44 is provided with a top pin 442 in communication with the inner cavity of the hydraulic cylinder 44, the top pin 442 is provided with a hydraulic oil passage separated from the inner cavity of the hydraulic cylinder 44, and the hydraulic oil passage is connected with a hydraulic oil tank through an oil pipe; the armrest 3 is fixedly connected with a chair back adjusting button 5, the chair back adjusting button 5 controls the top pin 442 to move in the piston rod 441 of the hydraulic cylinder 44 through a cable, and the top pin 442 is pressed into the piston rod 441 to realize the communication pipe of the inner cavity of the hydraulic cylinder 44 and the hydraulic oil tank.

[0024] The fixed arm frame 42 and the movable arm frame 41 are both made of sheet metal parts, a plurality of lower mounting holes 421 are formed on the fixed arm frame 42, a plurality of upper mounting holes 411 are formed on the movable arm frame 41, bolts are inserted in the upper mounting holes 411 and the lower mounting holes 421 respectively, the bolts are screwed on the chair back 1 and the chair basin 2 respectively, and the sheet metal parts facilitate installation and connection.

[0025] One end of the hinge shaft 43 is shaped into a limiting head, the limiting head abuts against the movable arm support 41, the other end of the hinge shaft 43 extends out of the fixed arm support 42 and is screwed with a limiting nut, the structure is that the hinge hole bolt is used as the hinge shaft 43, here, the limiting nut needs to be additionally arranged for limiting.

[0026] The piston rod 441 of the hydraulic cylinder 44 is shaped with a central hole 4411 which is communicated with the inner cavity of the piston rod 441, the inner wall of the central hole 4411 at the end of the piston rod 441 is shaped with a ring groove 4412 which is in rectangular section, the end face of the piston rod 441 around the central hole 4411 is shaped with an outer threaded sleeve 44413;

[0027] The plunger pin 442 is inserted into the central hole 4411 of the piston rod 441, the hydraulic oil passage on the plunger pin 442 comprises a vertical hole 422 which penetrates the upper end face of the plunger pin 442, the outer wall of the plunger pin 442 at the central hole 4411 is shaped with a horizontal hole 4423 which is communicated with the vertical hole 422, the lower side of the horizontal hole 4423 is inserted and fixed with a lower sealing ring 445 on the inner wall of the central hole 4411, the lower sealing ring 445 is pressed against the outer wall of the plunger pin 442;

[0028] The lower end of the plunger pin 442 is inserted into the ring groove 4412 of the piston rod 441 and is shaped with a connecting column 4421, the connecting column 4421 is inserted with a compression spring 443, the upper and lower ends of the compression spring 443 are pressed against the plunger pin 442 and the piston rod 441; the upper end of the plunger pin 442 extends out of the piston rod 441 and is sleeved with a limiting cap sleeve 444, the limiting cap sleeve 444 is screwed and fixed on the outer threaded sleeve 44413 of the piston rod 441; the outer wall of the plunger pin 442 is shaped with a limiting block ring 4424, the limiting block ring 4424 is inserted into the limiting cap sleeve 444 and is pressed against the inner end face of the upper part of the limiting cap sleeve 444;

[0029] The above is a specific connection structure between the plunger pin 442 and the hydraulic cylinder 44, when the plunger pin 442 moves downward, the horizontal hole 4423 can move into the ring groove 4412 of the piston rod 441, so as to realize the communication with the central hole 4411 of the piston rod 441.

[0030] The distance between the lower end face of the ring groove 4412 of the piston rod 441 and the lower end face of the connecting column 4421 is greater than the distance from the limiting block ring 4424 to the upper end face of the piston rod 441, so as to limit the plunger pin 442 from separating from the piston rod 441, the distance from the limiting block ring 4424 to the upper end face of the piston rod 441 is greater than the distance from the upper end face of the ring groove 4412 to the horizontal hole 4423, so as to realize that the horizontal hole 4423 can move into the ring groove 4412.

[0031] The outer wall of the lower part of the plunger pin 442 is shaped with an oil passage groove 4425 which is communicated with the horizontal hole 4423 and is in annular shape.

[0032] The upper end of the plunger 442 protrudes out of the limiting cap sleeve 444 and is sleeved with a connecting sleeve 6, the lower part of the connecting sleeve 6 is fixedly sleeved on the limiting cap sleeve 444, and the outer wall of the upper part of the plunger 442 abuts against the inner wall of the upper part in the connecting sleeve 6; the vertical hole 422 of the plunger 442 is fixedly sleeved with an oil passage 7, the upper part of the connecting sleeve 6 is sleeved on the oil passage 7 and abuts against the outer wall of the oil passage 7; the oil passage 7 is fixedly screwed with an oil pipe joint 8 on the connecting sleeve 6 at one side, the oil pipe joint 8 is screwed with a pressurized oil pipe, in order to improve the sealing performance, an upper sealing ring 10 and a lower sealing ring 9 are arranged respectively, the upper sealing ring 10 is fixedly sleeved on the connecting sleeve 6 and abuts against the oil passage 7, and the lower sealing ring 9 is fixedly sleeved on the plunger 442 and abuts against the inner wall of the connecting sleeve 6; the pressurized oil pipe is connected with an oil tank through an oil pump, and the backrest adjusting button 5 can start the oil pump through a cable, so that the connecting sleeve 6 is input with hydraulic oil, and then the plunger 442 is pressed into the piston rod 441.

[0033] Moreover, the main structure of the driver seat is made of carbon fiber and glass fiber composite material, which provides high strength support and reduces the weight of the driver seat.

[0034] Moreover, the middle part of the backrest 1 is provided with a concave cavity, an adjustable waist support can be arranged in the concave cavity, and a switch for adjusting the waist support is arranged on the side wall of the chair basin 2, if the waist support is provided with an air bag structure, the switch controls the inflation setting through a cable, and the inflation or deflation of the waist support realizes the adjustment of the waist support.

[0035] Working principle: the structure is a new type of backrest adjustable driver seat of a general aircraft, and the technical points mainly lie in the mechanical adjusting arm 4, when the plunger 442 of the hydraulic cylinder 44 on the mechanical adjusting arm 4 is pressed into the piston rod 441 of the hydraulic cylinder 44, the hydraulic oil in the hydraulic cylinder 44 is communicated, the driver sits on the seat, and the adjustment of the backrest 1 in the pitch direction can be realized through the swing of the body and the hand-held armrest 5, when the adjusted position is appropriate, the backrest adjusting button 5 is released, the plunger 442 pops out of the hydraulic cylinder 44, the hydraulic oil in the hydraulic cylinder 44 is cut off, and then the piston rod 441 on the hydraulic cylinder 44 cannot be further extended or retracted, so that the backrest 1 is positioned.

[0036] The embodiments are used to illustrate the utility model, and are not used to limit the utility model. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the utility model, and therefore the protection scope of the utility model should be as listed in the claims of the utility model.

Claims

1. A new type of universal aircraft backrest adjustable pilot seat, comprising a seat backrest (1) and a seat pan (2), both sides of the seat pan (2) are fixedly connected with armrests (3), characterized in that: The chair back (1) is provided with a cavity (11) on both sides, and a mechanical adjusting arm (4) is arranged in the cavity (11). The mechanical adjusting arm (4) comprises a movable arm frame (41) fixed in the chair back (1), the lower end of the movable arm frame (41) extends out of the chair back (1) and is connected by insertion to a hinge shaft (43), the movable arm frame (41) is hingedly connected to a fixed arm frame (42) through the hinge shaft (43), and the fixed arm frame (42) is fixed to the outer wall on both sides of the chair basin (2). One side of the movable arm frame (41) is provided with an inclined hydraulic cylinder (44), the bottom of the cylinder body of the hydraulic cylinder (44) is formed with a notch, the notch is inserted with a hinge lug (451), the hinge lug (451) is formed on a hinge seat (45) and is hingedly connected to the cylinder body of the hydraulic cylinder (44) through hinge hole bolts (47), the hinge seat (45) is fixed to the fixed arm frame (42), the piston rod (441) of the hydraulic cylinder (44) is inserted and fixed with a rotating shaft (46), one end of the rotating shaft (46) abuts against the fixed arm frame (42) and is fixed with a screw (48), and the screw (48) is inserted into the movable arm frame (41). The top of the hydraulic cylinder (44) is provided with a top pin (442) connected with the inner cavity of the hydraulic cylinder (44), the top pin (442) is provided with a hydraulic oil channel separated from the inner cavity of the hydraulic cylinder (44), the hydraulic oil channel is connected with a hydraulic oil tank through an oil pipe, the armrest (3) is fixed with a chair back adjusting button (5), the chair back adjusting button (5) controls the top pin (442) to move in the piston rod (441) of the hydraulic cylinder (44) through a cable, and the top pin (442) is pressed into the piston rod (441) to realize the communication between the inner cavity of the hydraulic cylinder (44) and the hydraulic oil tank.

2. A new type of universal aircraft seat with adjustable backrest according to claim 1, characterized in that: The fixed arm frame (42) and the movable arm frame (41) are both sheet metal parts, a plurality of lower mounting holes (421) are formed on the fixed arm frame (42), a plurality of upper mounting holes (411) are formed on the movable arm frame (41), bolts are inserted into the upper mounting holes (411) and the lower mounting holes (421), and the bolts are screwed into the chair back (1) and the chair basin (2) respectively.

3. A new type of universal aircraft seat with adjustable backrest according to claim 1, characterized in that: One end of the hinge shaft (43) is formed with a limiting head, the limiting head abuts against the movable arm frame (41), and the other end of the hinge shaft (43) extends out of the fixed arm frame (42) and is screwed with a limiting nut.

4. A new type of universal aircraft seat with adjustable backrest according to claim 1, characterized in that: The piston rod (441) of the hydraulic cylinder (44) is formed with a central hole (4411) connected with the inner cavity of the piston rod (441), a ring groove (4412) with a rectangular cross section is formed on the inner wall of the central hole (4411) at the end of the piston rod (441), and an external thread sleeve (44413) is formed on the end face of the piston rod (441) around the central hole (4411). The top pin (442) is inserted into the center hole (4411) of the piston rod (441), the hydraulic oil channel on the top pin (442) comprises a vertical hole (422) penetrating the upper end surface of the top pin (442), the outer wall of the top pin (442) at the center hole (4411) is formed with a horizontal hole (4423) in communication with the vertical hole (422), the lower side of the horizontal hole (4423) is inserted and fixed with a lower sealing ring (445) on the inner wall of the center hole (4411), and the lower sealing ring (445) is pressed against the outer wall of the top pin (442); The lower end of the top pin (442) is inserted into the annular groove (4412) of the piston rod (441) and is formed with an adapter column (4421), the adapter column (4421) is inserted with a compression spring (443), and the upper and lower ends of the compression spring (443) are pressed against the top pin (442) and the piston rod (441); the upper end of the top pin (442) extends out of the piston rod (441) and is sleeved with a limiting cap sleeve (444), the limiting cap sleeve (444) is screwed and fixed on the outer threaded sleeve (44413) of the piston rod (441); the outer wall of the top pin (442) is formed with a limiting stop ring (4424), the limiting stop ring (4424) is inserted into the limiting cap sleeve (444) and abuts against the inner end surface of the upper part of the limiting cap sleeve (444).

5. A new type of universal aircraft seat with adjustable backrest according to claim 1, characterized in that: The distance between the lower end surface of the annular groove (4412) of the piston rod (441) and the lower end surface of the adapter column (4421) is greater than the distance from the limiting stop ring (4424) to the upper end surface of the piston rod (441), and the distance from the limiting stop ring (4424) to the upper end surface of the piston rod (441) is greater than the distance from the upper end surface of the annular groove (4412) to the horizontal hole (4423).

6. A new type of universal aircraft seat with adjustable backrest according to claim 5, characterized in that: The outer wall of the lower part of the top pin (442) is formed with an oil channel (4425) in communication with the horizontal hole (4423) and in the form of a ring.

7. A new type of universal aircraft seat with adjustable backrest according to claim 5, characterized in that: The upper end of the top pin (442) extends out of the limiting cap sleeve (444) and is sleeved with an adapter sleeve (6), the lower part of the adapter sleeve (6) is inserted and fixed on the limiting cap sleeve (444), and the outer wall of the upper part of the top pin (442) abuts against the inner wall of the upper part of the adapter sleeve (6); the vertical hole (422) of the top pin (442) is inserted and fixed with an oil channel connector (7), the upper part of the adapter sleeve (6) is inserted on the oil channel connector (7) and abuts against the outer wall of the oil channel connector (7); the oil pipe connector (8) is screwed and fixed on the adapter sleeve (6) on one side of the oil channel connector (7), and the oil pipe connector (8) is screwed with a pressurized oil pipe.