CN112224420B - Crash-resistant seat capable of changing load and absorbing energy - Google Patents
Crash-resistant seat capable of changing load and absorbing energy Download PDFInfo
- Publication number
- CN112224420B CN112224420B CN202011097259.4A CN202011097259A CN112224420B CN 112224420 B CN112224420 B CN 112224420B CN 202011097259 A CN202011097259 A CN 202011097259A CN 112224420 B CN112224420 B CN 112224420B
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- China
- Prior art keywords
- rocker arm
- pipe
- load
- cylinder
- sleeved
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- 238000005096 rolling process Methods 0.000 claims abstract description 37
- 239000006096 absorbing agent Substances 0.000 claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 17
- 239000010959 steel Substances 0.000 claims abstract description 17
- 230000005540 biological transmission Effects 0.000 claims description 10
- 238000010521 absorption reaction Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D11/00—Passenger or crew accommodation; Flight-deck installations not otherwise provided for
- B64D11/06—Arrangements of seats, or adaptations or details specially adapted for aircraft seats
- B64D11/0619—Arrangements of seats, or adaptations or details specially adapted for aircraft seats with energy absorbing means specially adapted for mitigating impact loads for passenger seats, e.g. at a crash
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D11/00—Passenger or crew accommodation; Flight-deck installations not otherwise provided for
- B64D11/06—Arrangements of seats, or adaptations or details specially adapted for aircraft seats
- B64D11/0639—Arrangements of seats, or adaptations or details specially adapted for aircraft seats with features for adjustment or converting of seats
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D11/00—Passenger or crew accommodation; Flight-deck installations not otherwise provided for
- B64D11/06—Arrangements of seats, or adaptations or details specially adapted for aircraft seats
- B64D11/0689—Arrangements of seats, or adaptations or details specially adapted for aircraft seats specially adapted for pilots
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D25/00—Emergency apparatus or devices, not otherwise provided for
- B64D25/02—Supports or holding means for living bodies
- B64D25/04—Seat modifications
Abstract
The invention discloses an anti-crash seat capable of changing load and absorbing energy, which comprises a support frame, a seat body matched with a vertical rod on the support frame through a linear bearing arranged on the back, a load-changing energy absorber, a lifting motor and a load-changing adjusting mechanism, wherein the support frame is provided with a seat body; the variable load energy absorber comprises an outer cylinder and an inner cylinder which are vertically sleeved together, the outer cylinder is connected to the back of a chair body, an adjusting ring is sleeved on the outer cylinder in an axial limiting mode, a steel ball is clamped on the side wall of the outer cylinder, a reverse pull rod is connected to the inner cylinder, the inner cylinder comprises a rolling pipe and a reverse pull pipe which are sleeved together, the radial outer side of the steel ball is limited by a stepped surface on the inner wall of the adjusting ring, the inner side of the steel ball is pressed and supported on the outer wall of the rolling pipe, the rolling pipe is a sandwich pipe, the reverse pull pipe is turned inwards to form an annular space, the middle of the reverse pull rod is propped against the bottom end of the reverse pull pipe, the top of the reverse pull pipe is supported on the top end of the annular space after extending into the reverse pull pipe, two ends of a lifting motor are respectively connected with a supporting frame and the whole inner cylinder, and an operating part of the variable load adjusting mechanism is located on the side part of the chair body and an executing part can drive the adjusting ring to rotate. The invention has convenient load-changing adjustment and lifting adjustment.
Description
Technical Field
The invention belongs to the technical field of aviation equipment, and particularly relates to an anti-crash seat capable of changing load and absorbing energy.
Background
The energy absorption technology is a core technology of the crash-resistant seat and can be divided into a fixed load energy absorption technology and a variable load energy absorption technology, wherein the setting of the energy absorption working load is related to the weight of a pilot and the weight of a movable part of the seat. The helicopter crash-resistant seat generally adopts a fixed load energy absorption technology, but the fixed load energy absorption technology can only provide optimal protection for pilots with specific weight, and is not so effective for protecting pilots with too light weight or too heavy weight, so that in order to ensure that the energy absorption device provides optimal overload protection for all pilots when the helicopter crashes, the limited space below the seat is utilized more reasonably, and the load-changing energy absorption technology is adopted. The existing crash-resistant seat capable of changing load and absorbing energy is complex in load-changing adjustment process and troublesome in operation, and most of lifting adjustment adopts a spring or gas spring mode, and passengers can only operate after leaving the seat cushion in the lifting adjustment process.
Technical proposal
The invention aims to provide an anti-crash seat capable of changing load and absorbing energy, which can adjust the load, and is convenient in changing load adjustment and lifting adjustment.
The technical scheme adopted by the invention is as follows:
the crash-resistant seat capable of absorbing energy in a variable load mode comprises a support frame fixedly connected to a machine body structure, a seat body matched with a vertical rod on the support frame through a linear bearing arranged on the back face, a variable load energy absorber, a lifting motor and a variable load adjusting mechanism arranged on the seat body; the variable load energy absorber comprises an outer cylinder and an inner cylinder which are vertically sleeved together, the outer cylinder is connected to the back of a chair body, an adjusting ring is sleeved on the outer cylinder in an axial limiting mode, a steel ball is clamped on the side wall of the outer cylinder, a reverse pull rod is connected to the inner cylinder, the inner cylinder comprises a rolling pipe and a reverse pull pipe which are sleeved together, the radial outer side of the steel ball is limited by a stepped surface on the inner wall of the adjusting ring, the inner side of the steel ball is pressed and supported on the outer wall of the rolling pipe, the rolling pipe is a sandwich pipe, the reverse pull pipe is turned inwards to form an annular space, the middle of the reverse pull rod is propped against the bottom end of the reverse pull pipe, the top of the reverse pull pipe is supported on the top end of the annular space after extending into the reverse pull pipe, two ends of a lifting motor are respectively connected with a supporting frame and the whole inner cylinder, and an operating part of the variable load adjusting mechanism is located on the side part of the chair body and an executing part can drive the adjusting ring to rotate.
Further, the variable load adjusting mechanism comprises a handle rocker arm which can swing and lock back and forth and is arranged on the side part of the chair body, and a transmission shaft which is rotatably arranged at the vertical corner of the back of the chair body through a support, wherein an upper rocker arm and a lower rocker arm are respectively arranged on the upper part and the lower part of the transmission shaft, the bottom end of the handle rocker arm is connected with the lower rocker arm through a lower pull rod, and the upper rocker arm is connected with an adjusting ring through an upper pull rod.
Further, the lower pull rod is connected with the lower rocker arm through the switching lug, the lower pull rod is hinged with the switching lug, and the switching lug is in sliding hinge with a waist hole on the lower rocker arm.
Further, the two ends of the transmission shaft are cylinders, the middle part is a square column wider than the cylinders, circular arc grooves are formed in the vicinity of the upper rocker arm and the lower rocker arm of the square column, the upper rocker arm and the lower rocker arm are sleeved on the square column through square holes with openings in a matched mode, the openings of the square holes are locked through screws, and the screws are limited through the circular arc grooves.
Further, the operation part of the variable load adjusting mechanism comprises a handle seat arranged at the side part of the chair body and a handle rocker arm capable of swinging back and forth and arranged at the side part of the chair body, a long hole is formed in the top surface of the handle seat, a gear groove is formed along the long hole, a spring and a limiting cylinder are sleeved on the upper part of the handle rocker arm, a handle cover is arranged at the top end of the handle rocker arm in a sleeved mode, the spring is tightly pressed between the limiting cylinder and the handle cover, when the handle rocker arm swings in the long hole, the limiting cylinder is pressed on the inlet side of the long hole to slide, and when the handle rocker arm swings to the gear groove, the limiting cylinder is pushed into the gear groove by the spring and is limited.
Further, three-level stepped surfaces are arranged on the inner wall of the adjusting ring, the load-changing energy absorber has corresponding three-level energy absorbing capacity, and the load-changing adjusting mechanism has corresponding three-gear positions.
Further, the middle part of the counter pull rod is provided with a shaft shoulder, the upper part of the counter pull rod is sleeved with a guide cylinder, the top end of the counter pull rod is connected with a pressure head, the guide cylinder is axially limited through the shaft shoulder and the pressure head, the upper part of the guide cylinder is provided with a first-stage step, the lower part of the guide cylinder is provided with an enlarged second-stage step, the inner wall of the rolling tube is sleeved with the counter pull tube and the second-stage step in a matched manner, the inner wall of the counter pull tube is sleeved with the first-stage step and the top end of the annulus is pressed by the pressure head, and the end face of the second-stage step abuts against the bottom end of the counter pull tube.
Further, the outer cylinder is arranged on the back of the chair body through the fixing ring, the top end of the outer cylinder is provided with a flanging, and the adjusting ring is axially limited through the fixing ring and the flanging.
Further, the outer cylinder is sleeved on the rolling pipe in a matched mode, a limiting shaft is arranged on the rolling pipe, and the limiting shaft is matched with a vertical groove on the outer cylinder.
Further, the top ends of the rolling pipe and the reverse pulling pipe are sleeved on the upper joint and fixed, and the upper joint is connected with the lifting motor.
The beneficial effects of the invention are as follows:
during emergency landing, overload is sequentially transmitted to the lifting motor, the variable load energy absorber and the chair body from the support frame, so that the variable load energy absorber is provided with three stress components and is used as a main energy absorbing mechanism, in the falling collision process, the inner cylinder and the outer cylinder of the variable load energy absorber relatively move to deform the rolling pipe and the counter-pulling pipe, so that falling collision energy is absorbed, the deformation of the rolling pipe is determined by the rolling depth of the steel ball on the rolling pipe, and when the variable load adjusting mechanism drives the adjusting ring to rotate, the rolling depth of the steel ball on the rolling pipe is changed by selecting stepped surfaces with different depths, so that variable load is adjusted to adapt to the weights of passengers with different percents; the operation part of the variable load adjusting mechanism is positioned at the side part of the chair body, so that the variable load adjusting operation is convenient, and the lifting motor is connected with the variable load energy absorber in series, so that the electric lifting adjustment of the chair body can be realized, and the lifting adjustment is convenient.
Drawings
FIG. 1 is a schematic illustration of an anti-crash seat capable of load-changing and energy-absorbing in accordance with an embodiment of the invention.
FIG. 2 is a schematic diagram II of an anti-crash seat capable of varying load and absorbing energy in an embodiment of the invention.
Fig. 3 is an installation schematic diagram of an operation portion of the load adjuster mechanism in the embodiment of the present invention.
Fig. 4 is a schematic view of the installation of the load adjuster mechanism in an embodiment of the invention.
Fig. 5 is a schematic view showing the installation of the lower link, the lower rocker arm and the propeller shaft in the embodiment of the present invention.
Fig. 6 is a schematic view showing the removal of the lower tie rod, lower rocker arm and drive shaft in an embodiment of the present invention.
FIG. 7 is a schematic diagram of a load-varying energy absorber in an embodiment of the present invention.
Fig. 8 is a partial enlarged view of fig. 7.
Fig. 9 is a schematic view of an adjusting ring in an embodiment of the invention.
In the figure: 1-supporting frame, 2-chair body, 3-linear bearing, 4-lifting motor, 5-five-point safety belt, 6-variable load adjustment mechanism, 601-handle cover, 602-spring, 603-limit cylinder, 604-handle rocker arm, 605-scale plate, 606-handle seat, 607-lower pull rod, 608-switching lug, 609-lower rocker arm, 610-transmission shaft, 611-upper rocker arm, 612-support, 613-upper pull rod, 614-flat head shaft, 615-swing shaft, 616-bushing, 617-screw, 7-variable load energy absorber, 701-upper joint, 702-fixed ring, 703-adjusting ring, 704-rolling tube, 705-counter-pulling tube, 706-outer cylinder, 707-steel ball, 708-limit shaft, 709-counter-pull rod, 710-guide cylinder, 711-pressure head, 8-safety belt adjustment handle, 9-lifting adjustment button, 10-backrest component, 11-cushion component, a-circular arc groove, b-vertical groove, c-step surface.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
As shown in fig. 1 to 9, the crash-resistant seat capable of changing load and absorbing energy comprises a support frame 1 fixedly connected to a machine body structure, a seat body 2 matched with a vertical rod on the support frame 1 through a linear bearing 3 arranged on the back, a load-changing energy absorber 7, a lifting motor 4 and a load-changing adjusting mechanism 6 arranged on the seat body 2; the load-changing energy absorber 7 comprises an outer cylinder 706 and an inner cylinder which are vertically sleeved together, the outer cylinder 706 is connected to the back surface of the chair body 2, an adjusting ring 703 is sleeved on the outer cylinder in an axial limiting mode, a steel ball 707 is clamped on the side wall of the outer cylinder, a reverse pull rod 709 is connected to the inner cylinder, the inner cylinder comprises a rolling tube 704 and a reverse pull tube 705 which are sleeved together, the outer side of the steel ball 707 in the radial direction is limited by a step surface c on the inner wall of the adjusting ring 703, the inner side of the steel ball is pressed and supported on the outer wall of the rolling tube 704, the rolling tube 704 is a sandwich tube, the reverse pull tube 705 is turned inwards to form an annular space, the middle part of the reverse pull rod 709 is supported on the top end of the annular space after the top of the reverse pull tube 705 stretches into the reverse pull tube 705, two ends of the lifting motor 4 are respectively connected with the support frame 1 and the whole inner cylinder, and an operating part of the load-changing adjusting mechanism 6 is positioned on the side part of the chair body 2, and an executing part can drive the adjusting ring 703 to rotate. During emergency landing, overload is sequentially transmitted to the lifting motor 4, the variable load energy absorber 7 and the chair body 2 from the support frame 1, so that the variable load energy absorber 7 is provided with three stress components and serves as a main energy absorbing mechanism, during the falling collision process, the inner cylinder and the outer cylinder 706 of the variable load energy absorber 7 move relatively, so that the rolling pipe 704 and the counter-pulling pipe 705 deform, and accordingly the falling collision energy is absorbed, wherein the deformation of the rolling pipe 704 is determined by the rolling depth of the steel ball 707 on the rolling pipe 704, and when the variable load adjusting mechanism 6 drives the adjusting ring 703 to rotate, the rolling depth of the steel ball 707 on the rolling pipe 704 is changed by selecting the step surface c with different depths, and further the variable load is adjusted to adapt to the weights of passengers with different percentiles; the operation part of the variable load adjusting mechanism 6 is positioned at the side part of the chair body 2, so that the variable load adjusting operation is convenient, and the lifting motor 4 and the variable load energy absorber 7 are connected in series, so that the electric lifting adjustment of the chair body 2 can be realized, and the lifting adjustment is convenient.
As shown in fig. 1, in the present embodiment, the lift adjustment button 9 of the lift motor 4 is located at the side of the chair body 2.
As shown in fig. 1, in this embodiment, the lifting motor 4 is provided on a cross brace of the support frame 1, the support frame 1 is provided with two vertical rods, and each vertical rod is matched with the upper and lower linear bearings 3.
As shown in fig. 2, in the present embodiment, a backrest module 10 and a seat cushion module 11 for comfort are attached to the seat body 2.
As shown in fig. 2, in this embodiment, the seat body 2 is provided with a five-point seat belt 5 on the front surface and a seat belt adjusting handle 8 on the side surface.
As shown in fig. 3, in the present embodiment, the operation portion of the load-changing adjusting mechanism 6 includes a handle seat 606 provided at the side of the chair body 2 and a handle rocker arm 604 provided at the side of the chair body 2 so as to be swingable back and forth, a long hole is provided at the top surface of the handle seat 606, a gear groove is provided along the long hole, the upper portion of the handle rocker arm 604 penetrates out of the long hole and is sleeved with a spring 602 and a limiting cylinder 603, a handle cover 601 is provided at the top end, the spring 602 is pressed between the limiting cylinder 603 and the handle cover 601, when the handle rocker arm 604 swings in the long hole, the limiting cylinder 603 is pressed at the entrance side of the long hole to slide, and when swinging to the gear groove, the limiting cylinder 603 is pushed into the gear groove by the spring 602 and is limited, and thereafter the limiting cylinder 603 is pulled out against the spring force to unlock.
As shown in fig. 3, in the present embodiment, the handle rocker arm 604 is connected to the swing shaft 615 through the bushing 616, the front surface of the handle base 606 is provided with the scale plate 605, and the swing shaft 615 also functions as a screw to connect the handle base 606, the scale plate 605 and the handle rocker arm 604 together.
As shown in fig. 4, in the present embodiment, the load-changing adjusting mechanism 6 includes a handle rocker arm 604 provided on a side portion of the chair body 2 and capable of swinging and locking back and forth, and a transmission shaft 610 rotatably provided at a vertical corner of a back surface of the chair body 2 through a support 612, the upper and lower parts of the transmission shaft 610 are respectively provided with an upper rocker arm 611 and a lower rocker arm 609, the bottom end of the handle rocker arm 604 is connected with the lower rocker arm 609 through a lower pull rod 607, and the upper rocker arm 611 is connected with the adjusting ring 703 through an upper pull rod 613.
In this embodiment, as shown in fig. 5 and 6, the lower link 607 is connected to the lower rocker arm 609 by means of a transfer tab 608, the lower link 607 being hinged to the transfer tab 608, the transfer tab 608 being slidably hinged to a waist hole in the lower rocker arm 609. The transfer lug 608 is located between the lower pull rod 607 and the lower rocker arm 609, so as to eliminate the phenomenon that the mechanism is blocked due to the tiny rotation of the lower pull rod 607 in the adjusting process, and the lower rocker arm 609 is connected with the transfer lug 608 by adopting a waist-shaped groove, so that the phenomenon that the mechanism is blocked due to the fact that the rotation track of the hinge point in the adjusting process is an arc line instead of a straight line is effectively avoided.
As shown in fig. 5 and 6, in this embodiment, the two ends of the transmission shaft 610 are cylinders, the middle part is a square column wider than the cylinders, circular arc grooves a are formed near the upper rocker arm 611 and the lower rocker arm 609 on the square column, the upper rocker arm 611 and the lower rocker arm 609 are sleeved on the square column through the square holes with openings, the openings of the square holes are locked through screws 617, and the screws 617 are limited through the circular arc grooves a.
As shown in fig. 3, 5 and 6, in this embodiment, all hinge points on the load adjuster mechanism 6 employ flat-headed shafts 614.
As shown in fig. 6, in this embodiment, the screw 617 is a flat head screw.
As shown in fig. 7 and 8, in this embodiment, the outer cylinder 706 is mounted on the back of the chair body 2 through the fixing ring 702, a flange is provided at the top end of the outer cylinder 706, and the adjusting ring 703 is axially limited by the fixing ring 702 and the flange.
As shown in fig. 7 and 8, in the present embodiment, the top ends of the rolling tube 704 and the counter-pulling tube 705 are both sleeved on the upper joint 701 and fixed, and the upper joint 701 is connected with the lifting motor 4.
As shown in fig. 7 and 8, in this embodiment, the middle part of the counter pull rod 709 is provided with a shaft shoulder, the upper part is sleeved with a guide cylinder 710, the top end is connected with a pressure head 711, the guide cylinder 710 is axially limited by the shaft shoulder and the pressure head 711, the upper part of the guide cylinder 710 is provided with a first stage step, the lower part is provided with an enlarged second stage step, the inner wall of the rolling tube 704 is sleeved on the counter pull tube 705 and the second stage step in a matched manner, the inner wall of the counter pull tube 705 is sleeved on the first stage step in a matched manner, the annular top end is pressed by the pressure head 711, and the end surface of the second stage step is propped against the bottom end of the counter pull tube 705.
As shown in fig. 7, in this embodiment, the outer cylinder 706 is sleeved on the rolling tube 704 in a matched manner, a limiting shaft 708 is arranged on the rolling tube 704, and the limiting shaft 708 is matched with a vertical groove b on the outer cylinder 706.
In this embodiment, as shown in fig. 9, three-stage stepped surfaces exist on the inner wall of the adjusting ring 703, the load-changing energy absorber 7 has a corresponding three-stage energy absorbing capability, and the load-changing adjusting mechanism 6 has a corresponding three-gear position. But not limited to, three gears, two gears, four gears, five gears, etc.
It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.
Claims (3)
1. An anti-crash seat capable of changing load and absorbing energy is characterized in that: comprises a supporting frame fixedly connected to a machine body structure, a chair body matched with a vertical rod on the supporting frame through a linear bearing arranged on the back, a variable load energy absorber, a lifting motor and a variable load adjusting mechanism arranged on the chair body; the variable load energy absorber comprises an outer cylinder and an inner cylinder which are vertically sleeved together, the outer cylinder is connected to the back of a chair body, an adjusting ring is sleeved on the outer cylinder in an axial limiting manner, a steel ball is clamped on the side wall of the outer cylinder, a reverse pull rod is connected to the inner cylinder, the inner cylinder comprises a rolling pipe and a reverse pull pipe which are sleeved together, the radial outer side of the steel ball is limited by a stepped surface on the inner wall of the adjusting ring, the inner side of the steel ball is pressed and supported on the outer wall of the rolling pipe, the rolling pipe is a sandwich pipe, the reverse pull pipe is turned inwards to form an annular space, the middle part of the reverse pull rod is propped against the bottom end of the reverse pull pipe, the top of the reverse pull pipe stretches into the reverse pull pipe and then is supported on the top end of the annular space, two ends of a lifting motor are respectively connected with a supporting frame and the whole inner cylinder, and an operating part of the variable load adjusting mechanism is positioned on the side part of the chair body and an executing part can drive the adjusting ring to rotate;
the load-changing adjusting mechanism comprises a handle rocker arm which can swing and lock back and forth and is arranged at the side part of the chair body, and a transmission shaft which is rotatably arranged at the vertical corner of the back of the chair body through a support, wherein an upper rocker arm and a lower rocker arm are respectively arranged on the upper part and the lower part of the transmission shaft, the bottom end of the handle rocker arm is connected with the lower rocker arm through a lower pull rod, and the upper rocker arm is connected with an adjusting ring through an upper pull rod;
the inner wall of the adjusting ring is provided with three-level stepped surfaces, the load-changing energy absorber has corresponding three-level energy absorbing capacity, and the load-changing adjusting mechanism has corresponding three-gear;
the lower pull rod is connected with the lower rocker arm through the switching lug, the lower pull rod is hinged with the switching lug, and the switching lug is in sliding hinge connection with a waist hole on the lower rocker arm;
the two ends of the transmission shaft are cylinders, the middle part of the transmission shaft is a square column wider than the cylinders, arc grooves are formed in the vicinity of an upper rocker arm and a lower rocker arm of the square column, the upper rocker arm and the lower rocker arm are sleeved on the square column in a matched manner through square holes with openings, the openings of the square holes are locked through screws, and the screws are limited through the arc grooves;
the operation part of the variable load adjusting mechanism comprises a handle seat arranged at the side part of the chair body and a handle rocker arm capable of swinging back and forth and arranged at the side part of the chair body, a long hole is formed in the top surface of the handle seat, a gear groove is formed along the long hole, the upper part of the handle rocker arm penetrates out of the long hole and is sleeved with a spring and a limiting cylinder, the top end of the handle rocker arm is provided with a handle cover, the spring is tightly pressed between the limiting cylinder and the handle cover, when the handle rocker arm swings in the long hole, the limiting cylinder is pressed on the inlet side of the long hole to slide, and when the handle rocker arm swings to the gear groove, the limiting cylinder is pushed into the gear groove by the spring and is limited;
the middle part of the counter pull rod is provided with a shaft shoulder, the upper part of the counter pull rod is sleeved with a guide cylinder, the top end of the counter pull rod is connected with a pressure head, the guide cylinder is axially limited through the shaft shoulder and the pressure head, the upper part of the guide cylinder is provided with a first-stage step, the lower part of the guide cylinder is provided with an enlarged second-stage step, the inner wall of the rolling pipe is sleeved on the counter pull pipe and the second-stage step in a matched manner, the inner wall of the counter pull pipe is sleeved on the first-stage step in a matched manner, the annular top end of the counter pull pipe is pressed by the pressure head, and the end surface of the second-stage step is propped against the bottom end of the counter pull pipe;
the outer cylinder is arranged on the back of the chair body through the fixing ring, the top end of the outer cylinder is provided with a flanging, and the adjusting ring is axially limited through the fixing ring and the flanging.
2. The load-variable energy-absorbing crash-resistant seat of claim 1, wherein: the outer cylinder is sleeved on the rolling pipe in a matched mode, a limiting shaft is arranged on the rolling pipe, and the limiting shaft is matched with a vertical groove on the outer cylinder.
3. The load-variable energy-absorbing crash-resistant seat of claim 1, wherein: the top ends of the rolling pipe and the reverse pulling pipe are sleeved on an upper joint and fixed, and the upper joint is connected with a lifting motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011097259.4A CN112224420B (en) | 2020-10-14 | 2020-10-14 | Crash-resistant seat capable of changing load and absorbing energy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011097259.4A CN112224420B (en) | 2020-10-14 | 2020-10-14 | Crash-resistant seat capable of changing load and absorbing energy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112224420A CN112224420A (en) | 2021-01-15 |
| CN112224420B true CN112224420B (en) | 2023-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011097259.4A Active CN112224420B (en) | 2020-10-14 | 2020-10-14 | Crash-resistant seat capable of changing load and absorbing energy |
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|---|---|
| CN (1) | CN112224420B (en) |
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