Explosion-proof seat energy absorption device and vehicle

Abstract

An anti-explosion seat energy absorption device and a vehicle relate to the technical field of anti-explosion vehicles, the anti-explosion seat energy absorption device comprises a seat support, the middle part of the seat support is rotatably connected with a torsion energy absorption assembly, a bottom plate of the seat support is fixedly connected with a self-locking mechanism, and the self-locking mechanism is in transmission connection with one end of a cross-shaped support arm of the seat support; the torsion energy absorption assembly is integrally of a linear rod structure and comprises a torsion energy absorption component, the torsion energy absorption component is sleeved with a sleeve, the left end and the right end of the torsion energy absorption component are detachably connected with a first shaft sleeve and a second shaft sleeve respectively, and the first shaft sleeve and the second shaft sleeve are detachably connected with the left side and the right side of the seat support respectively. According to the invention, impact energy can be effectively absorbed, it is ensured that the support does not rebound to cause secondary injury to passengers, meanwhile, adjustment can be carried out according to different passenger weights and different vehicle types, and the problems of small in-vehicle space, hindering of seat back adjustment and low comfort in the prior art can be effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of explosion-proof vehicles, in particular to an explosion-proof seat energy-absorbing device and a vehicle. BACKGROUND

[0002] Most of the existing lightning and explosion-proof seat energy-absorbing devices adopt the way of plastic deformation of pulling spring sheet to absorb the energy of explosion impact. However, such devices can only be arranged on seat supports containing top and bottom beams, which leads to further reduction of the space in the vehicle and also hinders the adjustment of the seat back, reducing the comfort of the passengers.

[0003] CN111572420B relates to a lightning-proof seat energy-absorbing device for military vehicles. It includes a fixing mechanism, a guide mechanism, a starting mechanism and an energy-absorbing mechanism. The fixing mechanism includes an upper connecting block and a lower connecting block of the energy-absorbing device, which are connected to the corresponding mounting points of the upper and lower beams of the seat frame through bolts; the guide mechanism includes a spring sheet mounting block and an external box of the energy-absorbing device, which together constrain the movement trajectory of the energy-absorbing device during its operation; the starting mechanism includes a spring sheet and a constraint bolt, which are connected to the spring sheet mounting block; the energy-absorbing mechanism includes a steel belt and a steel belt limiting bolt, which are connected by the spring sheet mounting block through a bolt and then connected to the fixed support mechanism. However, this prior art compresses the space in the vehicle and also hinders the adjustment of the seat back, reducing the comfort of the passengers.

[0004] CN113715707A discloses a lightning-proof seat energy-absorbing structure for a vehicle, which includes an energy-absorbing mechanism and a seat base, both of which are located between the seat and the vehicle body floor. The energy-absorbing mechanism includes an energy-absorbing pull rod, the outer side of which is sleeved with an inner sleeve, and the outer side of the inner sleeve is fixedly sleeved with an outer sleeve. The energy-absorbing pull rod and the inner sleeve are in interference fit, and when the seat moves downward, the energy-absorbing pull rod and the inner sleeve move relatively and the interference amount increases. However, this prior art adopts a separate point-to-point support method, which is prone to damage or deformation when an impact occurs, thereby affecting the stability and safety of use. SUMMARY

[0005] The present application aims to provide an explosion-proof seat energy-absorbing device and a vehicle, which can effectively absorb impact energy and set a triggering mechanism and a self-locking mechanism after energy absorption is completed, ensuring that the support does not rebound and cause secondary injury to the passengers. It can also be adjusted according to different passenger weights and different vehicle models, and can be reused. It can effectively solve the problems of small space in the vehicle, hindering the adjustment of the seat back and low comfort of the prior art.

[0006] The present application provides the following solutions

[0007] The application discloses an anti-explosion seat energy-absorbing device, which comprises a seat support, a torsion energy-absorbing assembly rotatably connected to the middle part of the seat support, and a self-locking mechanism fixedly connected to the bottom plate of the seat support and in transmission connection with one end of a cross support arm of the seat support.

[0008] Further, the torsion energy-absorbing assembly is in the form of a straight rod structure, comprising a torsion energy-absorbing component, a sleeve externally sleeved on the torsion energy-absorbing component, and a first shaft sleeve and a second shaft sleeve respectively detachably connected to the left end and the right end of the torsion energy-absorbing component and detachably connected to the left side and the right side of the seat support.

[0009] The torsion energy-absorbing component is used for providing elastic buffering and absorbing energy in explosion, and is detachably connected, so that the component can be conveniently replaced, and the universality is improved.

[0010] Further, the self-locking mechanism comprises a fixed support fixedly connected to the upper surface of the bottom plate of the seat support, the fixed support comprises oppositely arranged left and right supports, a rotating shaft rotatably connected between the middle upper parts of the left and right supports, a straight toothed gear and a ratchet wheel fixedly connected in parallel to the middle part of the rotating shaft, a rack meshing with the lower part of the straight toothed gear, a pawl provided below the ratchet wheel, the pawl capable of being clamped into the teeth of the ratchet wheel, a pawl fixing seat provided in front of the pawl, the pawl fixing seat fixedly connected to the bottom plate, the front end of the pawl fixed to the inside of the pawl fixing seat through a pawl fixing pin, a spring provided between the pawl fixing pin and the pawl, a trigger pressing sheet clamped between the ratchet wheel and the pawl, and the front end of the trigger pressing sheet separating the ratchet wheel from the pawl; the rear end of the rack and the trigger pressing sheet are coaxially rotatably connected to the seat support.

[0011] The spring provided between the pawl fixing pin and the pawl can make the rear end of the pawl pop up upward; the pawl can be clamped into the teeth of the ratchet wheel to prevent the ratchet wheel from rotating reversely, so that the self-locking function is realized.

[0012] Further, the seat support comprises a bottom plate, the bottom plate is in the form of a rectangle, a lower support fixedly connected to the upper surface of the bottom plate, an upper support suspended above the lower support, and the lower support and the upper support movably connected through left and right cross support arms.

[0013] The lower support and the upper support are movably connected through the left and right cross support arms, so that the upper support can move up and down relative to the lower support.

[0014] Further, the lower support and the upper support are both rectangular frame structures, left and right sides of the lower support and the upper support are provided with sliding grooves, and the middle parts of the lower support and the upper support are each provided with two sliding rods arranged along the left-right direction, which are respectively a first sliding rod and a second sliding rod connected with the left and right sliding grooves of the upper support, and a third sliding rod and a fourth sliding rod connected with the left and right sliding grooves of the lower support; the first sliding rod and the second sliding rod are arranged in the same plane at the upper part in front and back, the third sliding rod and the fourth sliding rod are arranged in the same plane at the lower part in front and back, the first sliding rod and the third sliding rod are rotationally connected with one end of the corresponding sliding groove, and the second sliding rod and the fourth sliding rod are slidingly connected with the other end of the corresponding sliding groove; the rack of the self-locking mechanism and the rear end of the trigger pressing piece are rotationally sleeved at the middle part of the fourth sliding rod and can move back and forth with the fourth sliding rod.

[0015] The relative up-down movement of the upper and lower supports is converted into the front-back movement of the sliding rods by the sliding rods, and the rack of the self-locking mechanism and the trigger pressing piece are moved front and back, so as to control the displacement to release the pawl and realize the forward rotation and reverse self-locking of the ratchet; the linear motion is converted into rotation by the gear and rack structure, and the transmission ratio can be changed, the small displacement is amplified, and the ratchet is driven to rotate, which can not only realize self-locking in a larger range, but also make the response more timely.

[0016] Further, the left cross support arm includes first and second support pieces cross-hinged, and the right cross support arm includes third and fourth support pieces cross-hinged; the front and rear ends of the first support piece are fixedly connected with the left part of the first sliding rod and the left part of the fourth sliding rod respectively, the second support piece is hinged to the inner side of the first support piece, and the front and rear ends of the second support piece are fixedly connected with the left part of the third sliding rod and the left part of the second sliding rod respectively; the front and rear ends of the fourth support piece are fixedly connected with the right part of the first sliding rod and the right part of the fourth sliding rod respectively, the third support piece is hinged to the inner side of the fourth support piece, and the front and rear ends of the third support piece are fixedly connected with the right part of the third sliding rod and the right part of the second sliding rod respectively.

[0017] The connection of the sliding rods and the support pieces can convert the displacement of the support up and down movement into the front-back displacement of the sliding rods and the rotational displacement of the support pieces.

[0018] Further, the first support sheet and the second support sheet cross and overlap at the middle part of each, a circular hole is arranged on the first support sheet at the overlapping position, a hexagonal hole is arranged at the opposite position of the second support sheet, the left part of the first shaft sleeve is a cylindrical structure matched with the circular hole, and the right part is a hexagonal prism structure matched with the hexagonal hole; the third support sheet and the fourth support sheet cross and overlap at the middle part of each, a circular hole is arranged on the third support sheet at the overlapping position, a hexagonal hole is arranged at the opposite position of the fourth support sheet, the left part of the second shaft sleeve is a cylindrical structure matched with the circular hole, and the right part is a hexagonal prism structure matched with the hexagonal hole; the left end of the first shaft sleeve is provided with a limiting flange, and the first support sheet is stopped at the right side wall of the limiting flange; the outside of the hexagonal hole of the fourth support sheet is provided with an extending flange along the circumference, the right part of the second shaft sleeve is accommodated in the extending flange, and the right end surface of the extending flange is stopped at the elastic gasket; a gasket is arranged between the limiting flange and the first support sheet, between the first support sheet and the second support sheet, and between the third support sheet and the fourth support sheet, and the gasket is sleeved on the outside of the first shaft sleeve or the second shaft sleeve; the left end of the first shaft sleeve and the right end of the elastic gasket are respectively connected with fastening bolts, the fastening bolt at the left end of the first shaft sleeve is arranged in the first shaft sleeve and is threadedly connected with the left end of the torsion energy absorption component, and the fastening bolt at the right end of the elastic gasket is arranged in the elastic gasket and the second shaft sleeve and is threadedly connected with the right end of the torsion energy absorption component; the inner side walls of the second support sheet and the third support sheet at the two ends of the sleeve of the torsion energy absorption assembly are fixedly connected.

[0019] Through the connection of the torsion energy absorption assembly and each support sheet, the rotation of the support sheet can drive the torsion of the torsion energy absorption component, and external energy can be converted into elastic potential energy.

[0020] Further, the left end and the right end of the torsion energy absorption component are both hexagonal prism structures, the left end of the torsion energy absorption component is inserted into the first shaft sleeve, and the right end of the torsion energy absorption component is matched and inserted into the second shaft sleeve.

[0021] The adoption of the hexagonal prism structure and the insertion form can facilitate disassembly and assembly and better force transmission.

[0022] Further, two bearings are fixedly connected to the inner side walls of the middle upper parts of the left support and the right support, and the two ends of the rotating shaft are connected with the two bearings in interference fit; the rear end of the rack is fixedly connected with the trigger pressing sheet, and together they form a rack trigger pressing sheet assembly.

[0023] The arrangement of the bearings can make the rotation smoother, reduce wear, and improve the service life of the rotating shaft; the rear end of the rack and the trigger pressing sheet are integrated to form a rack trigger pressing sheet assembly, which avoids the sliding deviation of the trigger pressing sheet and strengthens the synchronism and stability of the displacement of the rack and the trigger pressing sheet.

[0024] A vehicle comprises the anti-explosion seat energy absorption device, and has all the advantages of the anti-explosion seat energy absorption device.

[0025] Compared with the prior art, the present application has the following advantages:

[0026] The anti-explosion seat energy-absorbing device and the vehicle provided by the present application can convert the energy of the force received by the seat support through torsion into elastic potential energy through a torsion energy-absorbing assembly, and the trigger mechanism and the self-locking mechanism after energy absorption are arranged to ensure that the support will not rebound to cause secondary injury to the passenger, and the device can be replaced and adjusted according to different passenger weights and different vehicle models and can be repeatedly used. The device can effectively solve the problems of small vehicle interior space, hindering seat back adjustment and low comfort in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the specific embodiments or the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0028] FIG. 1 is a structural schematic diagram of the anti-explosion seat energy-absorbing device according to the present application; Figure 1 FIG. 1 is a structural schematic diagram of the anti-explosion seat energy-absorbing device according to the present application;

[0029] FIG. 2 is another structural schematic diagram of the anti-explosion seat energy-absorbing device according to the present application; Figure 2 FIG. 3 is a structural schematic diagram of the torsion energy-absorbing assembly according to the present application;

[0030] FIG. 4 is another structural schematic diagram of the torsion energy-absorbing assembly according to the present application; Figure 3 FIG. 5 is a structural schematic diagram of the seat support according to the present application;

[0031] FIG. 6 is another structural schematic diagram of the seat support according to the present application; Figure 4 FIG. 7 is a top view of the anti-explosion seat energy-absorbing device according to the present application;

[0032] FIG. 8 is another top view of the anti-explosion seat energy-absorbing device according to the present application; Figure 5 FIG. 9 is a structural schematic diagram of the self-locking mechanism according to the present application;

[0033] FIG. 10 is another structural schematic diagram of the self-locking mechanism according to the present application; Figure 6 FIG. 11 is a structural schematic diagram of the self-locking mechanism according to the present application from another angle;

[0034] FIG. 12 is a partial structural schematic diagram of the self-locking mechanism according to the present application. Figure 7 FIG. 13 is a structural schematic diagram of the anti-explosion seat energy-absorbing device according to the present application;

[0035] FIG. 13 is a structural schematic diagram of the anti-explosion seat energy-absorbing device according to the present application;

[0036] 1, seat support; 11, bottom plate; 12, lower support; 121, third slide rod; 122, fourth slide rod; 13, upper support; 131, first slide rod; 132, second slide rod; 14, left cross support arm; 141, first support piece; 142, second support piece; 15, right cross support arm; 151, third support piece; 152, fourth support piece; 153, extension flange; 2, torsion energy absorption assembly; 21, torsion energy absorption component; 22, sleeve; 23, first shaft sleeve; 231, limiting flange; 24, second shaft sleeve; 25, elastic washer; 26, fastening bolt; 27, washer; 3, self-locking mechanism; 31, fixed support; 311, left support; 312, right support; 32, rotating shaft; 33, straight tooth gear; 34, ratchet wheel; 35, rack trigger pressing piece assembly; 351, rack; 352, trigger pressing piece; 36, pawl; 37, pawl fixing pin; 38, pawl fixing seat; 39, bearing. DETAILED DESCRIPTION

[0037] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present application.

[0038] The terms used in the embodiments of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. "Multiple" generally includes at least two.

[0039] It should be understood that the term "and / or" used herein is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0040] It should be understood that although the terms first, second, third, etc. may be used in the embodiments of the present application, these descriptions should not be limited to these terms. These terms are only used to distinguish the description. For example, without departing from the scope of the embodiments of the present application, the first can also be called the second, and similarly, the second can also be called the first.

[0041] Depending on the context, the word "if" as used herein can be interpreted to mean "when" or "while" or "in response to determining" or "in response to detecting." Similarly, the phrase "if it is determined" or "if [a stated condition or event] is detected" can be interpreted to mean "when it is determined" or "in response to determining" or "when [the stated condition or event] is detected" or "in response to detecting [the stated condition or event]."

[0042] It is also important to note that the terms "comprises", "comprising", "includes", "including" or their variants are intended to cover both non-exclusive and exclusive inclusion, such that the products or devices including a series of elements not only include those elements but also include other elements not explicitly listed, or further include other elements inherent in such products or devices. Without more limitations, the element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the product or device comprising the element.

[0043] In particular, it is important to note that the symbols and / or numbers present in the description, if not marked in the description of the figures, are not figure references.

[0044] Embodiment 1, please refer to Figure 1 As shown in the figure, the embodiment provides an anti-explosion seat energy-absorbing device, which comprises a seat support 1, a torsion energy-absorbing assembly 2 rotatably connected to the middle part of the seat support 1, and a self-locking mechanism 3 fixedly connected to the bottom plate 11 of the seat support 1.

[0045] Specifically, please refer to Figure 2 As shown in the figure, the torsion energy-absorbing assembly 2 is in the form of a straight rod body structure, comprising a torsion energy-absorbing component 21, which can be a torsion bar spring or other component that can be twisted and rebounded; the torsion energy-absorbing component 21 is externally sleeved with a sleeve 22, and a sufficient gap is left between the sleeve 22 and the torsion energy-absorbing component 21 to ensure that the normal work of the torsion energy-absorbing component 21 is not affected and it is protected from other forces except torsion force; the left and right ends of the torsion energy-absorbing component 21 are respectively detachably connected with a first shaft sleeve 23 and a second shaft sleeve 24, and the first shaft sleeve 23 and the second shaft sleeve 24 are connected with the seat support 1; the left and right ends of the torsion energy-absorbing component 21 are in the form of hexagonal prism, the left end of the torsion energy-absorbing component 21 is inserted into the first shaft sleeve 23, and the right end of the torsion energy-absorbing component 21 is inserted into the second shaft sleeve 24; the shaft sleeves at the two ends of the seat support 1 can be changed adaptively for different seat supports 1, so that the material or thickness of the torsion energy-absorbing component 21 and the shape of the shaft sleeves at the two ends can be changed to adapt to various environments such as different vehicles, passengers and working conditions, thereby enhancing the versatility.

[0046] Specifically, please refer to Figure 3As shown, the seat support 1 comprises a bottom plate 11, the upper surface of the bottom plate 11 is fixedly connected with a lower support 12, an upper support 13 is arranged above the lower support 12, and the lower support 12 and the upper support 13 are movably connected through a left cross support arm 14 and a right cross support arm 15; the lower support 12 and the upper support 13 are both rectangular frame structures, the left and right sides of the lower support 12 and the upper support 13 are provided with sliding grooves, and the middle portions of the lower support 12 and the upper support 13 are respectively provided with two sliding rods arranged in the left-right direction, which are a first sliding rod 131 and a second sliding rod 132 connected with the left and right sliding grooves of the upper support 13 and a third sliding rod 121 and a fourth sliding rod 122 connected with the left and right sliding grooves of the lower support 12, the first sliding rod 131 is arranged in front of the second sliding rod 132 in parallel, the third sliding rod 121 is arranged in front of the fourth sliding rod 122 in parallel, the first sliding rod 131 and the third sliding rod 121 are rotationally connected with the corresponding sliding grooves, and the second sliding rod 132 and the fourth sliding rod 122 are slidably connected with the corresponding sliding grooves; the left cross support arm 14 comprises a first support piece 141 and a second support piece 142 arranged in cross, and the right cross support arm 15 comprises a third support piece 151 and a fourth support piece 152 arranged in cross; the front and rear ends of the first support piece 141 are fixedly connected with the left portion of the first sliding rod 131 and the left portion of the fourth sliding rod 122 respectively, the second support piece 142 is arranged on the inner side of the first support piece 141, and the front and rear ends of the second support piece 142 are fixedly connected with the left portion of the third sliding rod 121 and the left portion of the second sliding rod 132 respectively; the front and rear ends of the fourth support piece 152 are fixedly connected with the right portion of the first sliding rod 131 and the right portion of the fourth sliding rod 122 respectively, the third support piece 151 is arranged on the inner side of the fourth support piece 152, and the front and rear ends of the third support piece 151 are fixedly connected with the right portion of the third sliding rod 121 and the right portion of the second sliding rod 132 respectively.

[0047] In particular, reference is made to Figure 3 and Figure 4As shown, the first support sheet 141 and the second support sheet 142 cross and overlap at the middle part of each, a circular hole is arranged on the first support sheet 141 at the overlapping position, a hexagonal hole is arranged at the opposite position of the second support sheet 142, the left part of the first shaft sleeve 23 is a cylindrical structure matching the circular hole, the right part is a hexagonal prism structure matching the hexagonal hole, so that the first shaft sleeve 23 is locked relative to the second support sheet 142 and can rotate relative to the first support sheet 141; the third support sheet 151 and the fourth support sheet 152 cross and overlap at the middle part of each, a circular hole is arranged on the third support sheet 151 at the overlapping position, a hexagonal hole is arranged at the opposite position of the fourth support sheet 152, the left part of the second shaft sleeve 24 is a cylindrical structure matching the circular hole, the right part is a hexagonal prism structure matching the hexagonal hole, so that the second shaft sleeve 24 is locked relative to the fourth support sheet 152 and can rotate relative to the third support sheet 151; a limiting flange 231 is arranged at the left end of the first shaft sleeve 23, the first support sheet 141 is stopped at the right side wall of the limiting flange 231; an extension flange 153 is arranged on the outer side of the hexagonal hole of the fourth support sheet 152 in the circumferential direction, the right part of the second shaft sleeve 24 is accommodated in the extension flange 153, and the right end face of the extension flange 153 is stopped at the elastic gasket 25; the sleeve 22 is fixedly connected with the inner side walls of the second support sheet 142 and the third support sheet 151, a gasket 27 is arranged between the limiting flange 231 and the first support sheet 141, between the first support sheet 141 and the second support sheet 142, and between the third support sheet 151 and the fourth support sheet 152, the gasket 27 is sleeved on the first shaft sleeve 23 or the second shaft sleeve 24, so that the cross support arm can drive the torsion energy absorption component 21 to rotate smoothly, the left end of the first shaft sleeve 23 and the right end of the elastic gasket 25 are respectively connected with fastening bolts 26, the fastening bolts 26 are respectively threadedly connected with both ends of the torsion energy absorption component 21, so that the parts of the torsion energy absorption assembly 2 and the support sheets of each cross support arm are clamped, and the elastic gasket 25 can avoid structural looseness during rotation of the support sheets and the torsion energy absorption component 21.

[0048] In particular, please refer to Figures 5 to 7As shown, the self-locking mechanism 3 comprises a fixed support 31 fixedly connected to the upper surface of the bottom plate 11, the fixed support 31 comprises oppositely arranged left and right supports 311 and 312, a rotating shaft 32 is rotatably connected between the middle upper portions of the left and right supports 311 and 312, the middle portion of the rotating shaft 32 is fixedly connected with a straight tooth gear 33 and a ratchet wheel 34 side by side, a rack 351 is engaged below the straight tooth gear 33, the rear end of the rack 351 is sleeved on the middle portion of the fourth sliding rod 122 and can move back and forth with the fourth sliding rod 122; a pawl 36 is arranged below the ratchet wheel 34, the pawl 36 can be clamped into the teeth of the ratchet wheel 34 to prevent the ratchet wheel 34 from rotating reversely, a pawl fixing seat 38 is arranged in front of the pawl 36, the pawl fixing seat 38 is fixedly connected with the bottom plate 11, the front end of the pawl 36 is fixed in the interior of the pawl fixing seat 38 through a pawl fixing pin 37, a spring is arranged between the pawl fixing pin 37 and the pawl 36 to make the rear end of the pawl 36 pop up upward; a trigger pressing plate 352 is arranged between the ratchet wheel 34 and the pawl 36, the front end of the trigger pressing plate 352 separates the ratchet wheel 34 from the pawl 36, and the rear end of the trigger pressing plate 352 is sleeved on the middle portion of the fourth sliding rod 122 and can move back and forth with the fourth sliding rod 122.

[0049] The application also provides a vehicle comprising the anti-explosion seat energy-absorbing device, which has all the advantages of the anti-explosion seat energy-absorbing device.

[0050] The working principle of the anti-explosion seat energy-absorbing device and the vehicle is as follows: the lower support 12 of the seat support 1 is fixed with the vehicle bottom plate 11, and the upper support 13 is fixed with the seat. In normal driving conditions, the seat support 1 is subjected to upward or downward force due to road bumps, and the seat support 1 is compressed. Since the first shaft sleeve 23 is clamped and fixed with the second support piece 142 of the left cross support arm 14, and the second shaft sleeve 24 is clamped and fixed with the fourth support piece 152 of the right cross support arm 15, the two ends of the torsion energy-absorbing component 21 are subjected to opposite forces and are twisted. The second sliding rod 132 in the upper support 13 and the fourth sliding rod 122 in the lower support 12 slide in the sliding groove to generate linear displacement under the pushing of the support plates fixedly connected with them, the rack 351 and the trigger pressing plate 352 generate linear motion under the driving of the fourth sliding rod 122 to pull the gear to rotate. Since the force caused by normal driving bumps is smaller than the trigger pressure, the displacement distance of the trigger pressing plate 352 is short, the trigger pressing plate 352 will not be separated from the pawl 36 to release the pawl 36, and therefore the self-locking mechanism 3 will not work, so that the support can return to the initial position under the elastic force of the torsion energy-absorbing component 21.

[0051] When the explosion occurs, the vehicle will be subjected to a great impact force in an instant, the seat bracket 1 is compressed quickly, the torsion energy absorption component 21 will be subjected to a great torsion force, part of which produces plastic deformation; at the same time, the rack 351 and the trigger pressing sheet 352 will produce a larger displacement, the trigger pressing sheet 352 is separated from the pawl 36 to release the pawl 36, during the compression of the seat bracket 1, the ratchet wheel 34 rotates forward, after the compression is completed, the torsion energy absorption component 21 rebounds, which drives the ratchet wheel 34 to rotate reversely, at this time, the pawl 36 will be clamped on the ratchet wheel 34, and the entire seat bracket 1 will complete self-locking, thereby preventing the rebound of the torsion energy absorption component 21 from causing secondary injury to the passenger.

[0052] Embodiment 2, please refer to Figures 5 to 7 As shown in the figure, the embodiment provides an anti-explosion seat energy absorption device, which improves the structure of the self-locking mechanism 3 on the basis of embodiment 1.

[0053] Specifically, the self-locking mechanism 3 comprises a fixed bracket 31 fixedly connected to the upper surface of the bottom plate 11, the fixed bracket 31 comprises oppositely arranged left and right brackets 311 and 312, two bearings 39 are fixedly connected to the inner walls of the middle upper parts of the left and right brackets 311 and 312, a rotating shaft 32 is connected between the two bearings 39 in interference fit, a straight-toothed gear 33 and a ratchet wheel 34 are fixedly connected in parallel to the middle part of the rotating shaft 32, a rack trigger pressing sheet assembly 35 is arranged below the straight-toothed gear 33, the rear end of the rack trigger pressing sheet assembly 35 is sleeved with the middle part of the fourth sliding rod 122 and can move forward and backward with the fourth sliding rod 122; the front part of the rack trigger pressing sheet assembly 35 is provided with a rack 351 and a trigger pressing sheet 352, the rack 351 is arranged below the straight-toothed gear 33 and is engaged with the straight-toothed gear 33, a pawl 36 is arranged below the ratchet wheel 34, the pawl 36 can be clamped into the tooth tip of the ratchet wheel 34 to prevent the ratchet wheel 34 from rotating reversely, a pawl fixing seat 38 is arranged in front of the pawl 36, the pawl fixing seat 38 is fixedly connected with the bottom plate 11, the front end of the pawl 36 is fixed in the interior of the pawl fixing seat 38 through a pawl fixing pin 37, a spring is arranged between the pawl fixing pin 37 and the pawl 36 to make the rear end of the pawl 36 pop up upward, and the trigger pressing sheet 352 is arranged between the ratchet wheel 34 and the pawl 36, the front end of the trigger pressing sheet 352 separates the ratchet wheel 34 from the pawl 36.

[0054] The bearings 39 arranged at both ends of the rotating shaft 32 can make the rotation more smooth, reduce the abrasion and improve the service life of the rotating shaft 32; the rear ends of the rack 351 and the trigger pressing sheet 352 are integrated into the rack trigger pressing sheet assembly 35, which avoids the sliding deviation of the trigger pressing sheet 352 and strengthens the synchronism and stability of the displacement of the rack 351 and the trigger pressing sheet 352.

[0055] The application also provides a vehicle comprising the anti-explosion seat energy absorption device, which has all the advantages of the anti-explosion seat energy absorption device.

[0056] The above examples are only used to illustrate the technical solutions of the present application, but not to limit the present application; although the present application has been described in detail with reference to the foregoing examples, those ordinarily skilled in the art should understand: the technical solutions recorded in the foregoing examples can still be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An explosion-proof seat energy absorption device, characterized in that: The invention comprises a seat support (1), wherein the middle portion of the seat support (1) is rotatably connected to a torsional energy absorption assembly (2), a bottom plate (11) of the seat support (1) is fixedly connected to a self-locking mechanism (3), and the self-locking mechanism (3) is transmission-connected to one end of a cross support arm of the seat support (1).

2. The explosion-proof seat energy absorption device according to claim 1, characterized in that: The torsional energy absorption assembly (2) is an I-shaped rod structure as a whole, comprising a torsional energy absorption component (21), wherein a sleeve (22) is sleeved on the outside of the torsional energy absorption component (21), and the left and right ends of the torsional energy absorption component (21) are detachably connected to a first shaft sleeve (23) and a second shaft sleeve (24), respectively, and the first shaft sleeve (23) and the second shaft sleeve (24) are detachably connected to the left and right sides of the seat bracket (1), respectively.

3. The explosion-proof seat energy absorption device according to claim 2, characterized in that: The self-locking mechanism (3) includes a fixed bracket (31) fixedly connected to the upper surface of the bottom plate (11) of the seat bracket (1), the fixed bracket (31) includes a left bracket (311) and a right bracket (312) arranged opposite to each other, a rotating shaft (32) is rotatably connected between the middle and upper parts of the left bracket (311) and the right bracket (312), a spur gear (33) and a ratchet (34) are fixedly connected side by side at the middle part of the rotating shaft (32), a rack (351) is meshed below the spur gear (33), a pawl (36) is provided below the ratchet (34), and the pawl (36) can be engaged with the ratchet (3 4), a pawl fixing seat (38) is provided in front of the pawl (36), the pawl fixing seat (38) is fixedly connected to the base plate (11), the front end of the pawl (36) is fixed to the inside of the pawl fixing seat (38) through the pawl fixing pin (37), and a spring is provided between the pawl fixing pin (37) and the pawl (36); a trigger pressing plate (352) is sandwiched between the ratchet (34) and the pawl (36), and the front end of the trigger pressing plate (352) separates the ratchet (34) from the pawl (36); the rear ends of the rack (351) and the trigger pressing plate (352) are coaxially rotatably connected to the seat bracket (1).

4. The explosion-proof seat energy absorption device according to claim 3, characterized in that: The seat support (1) includes a base plate (11) having a rectangular structure. A lower support (12) is fixedly connected to the upper surface of the base plate (11). An upper support (13) is suspended directly above the lower support (12). The lower support (12) and the upper support (13) are movably connected via a left cross support arm (14) and a right cross support arm (15).

5. The explosion-proof seat energy absorption device according to claim 4, characterized in that: The lower bracket (12) and the upper bracket (13) are both rectangular frame structures, and the left and right sides of the lower bracket (12) and the upper bracket (13) are provided with sliding grooves. The middle of the lower bracket (12) and the upper bracket (13) are respectively provided with two sliding rods arranged along the left and right directions, namely a first sliding rod (131) and a second sliding rod (132) connected to the left and right sliding grooves of the upper bracket (13), and a third sliding rod (121) and a fourth sliding rod (122) connected to the left and right sliding grooves of the lower bracket (12); the first sliding rod (131) and the second sliding rod (132) are connected to the left and right sliding grooves of the lower bracket (12); 32) are arranged in the same plane at the upper part, and the third slide bar (121) and the fourth slide bar (122) are arranged in the same plane at the lower part, respectively. The first slide bar (131) and the third slide bar (121) are connected to one end of the corresponding slide groove for limited rotation, and the second slide bar (132) and the fourth slide bar (122) are connected to the other end of the corresponding slide groove for sliding. The rear ends of the rack (351) and the trigger pressing plate (352) of the self-locking mechanism (3) are rotatably sleeved on the middle part of the fourth slide bar (122) and can be displaced forward and backward along with the fourth slide bar (122).

6. The explosion-proof seat energy absorption device according to claim 5, characterized in that: The left cross support arm (14) includes a first support piece (141) and a second support piece (142) that are cross-hinged, and the right cross support arm (15) includes a third support piece (151) and a fourth support piece (152) that are cross-hinged; the front and rear ends of the first support piece (141) are fixedly connected to the left part of the first slide bar (131) and the left part of the fourth slide bar (122), respectively; the second support piece (142) is hinged to the inner side of the first support piece (141), and the second support piece (14 2) are fixedly connected to the left part of the third slide bar (121) and the left part of the second slide bar (132) respectively; the front and rear ends of the fourth support piece (152) are fixedly connected to the right part of the first slide bar (131) and the right part of the fourth slide bar (122) respectively, the third support piece (151) is hinged to the inner side of the fourth support piece (152), and the front and rear ends of the third support piece (151) are fixedly connected to the right part of the third slide bar (121) and the right part of the second slide bar (132) respectively.

7. The explosion-proof seat energy absorption device according to claim 6, characterized in that: The first support piece (141) and the second support piece (142) cross and overlap at their respective middle parts, a circular hole is provided on the first support piece (141) at the overlapping part, and a hexagonal hole is provided at the opposite position of the second support piece (142). The left part of the first sleeve (23) is a cylindrical structure matching the circular hole, and the right part is a hexagonal structure matching the hexagonal hole. The third support piece (151) and the fourth support piece (152) cross and overlap at their respective middle parts, and a circular hole is provided on the third support piece (151) at the overlapping part. The fourth support piece (152) is provided with a hexagonal hole at a relative position, the left part of the second sleeve (24) is a cylindrical structure matching the circular hole, and the right part is a hexagonal structure matching the hexagonal hole; the left end of the first sleeve (23) is provided with a limiting flange (231), and the first support piece (141) is stopped at the right side wall of the limiting flange (231); the outer side of the hexagonal hole of the fourth support piece (152) is provided with an extension flange (153) along the circumferential direction, and the right part of the second sleeve (24) is accommodated in the extension flange. The right end face of the extending flange (153) is stopped by the elastic gasket (25); a gasket (27) is provided between the limiting flange (231) and the first support piece (141), between the first support piece (141) and the second support piece (142), and between the third support piece (151) and the fourth support piece (152), and the gasket (27) is sleeved on the outside of the first shaft sleeve (23) or the second shaft sleeve (24); the left end of the first shaft sleeve (23) and the right end of the elastic gasket (25) are respectively connected There is a fastening bolt (26), the fastening bolt (26) at the left end of the first shaft sleeve (23) is inserted into the first shaft sleeve (23) and is threadedly connected to the left end of the torsional energy absorbing component (21), and the fastening bolt (26) at the right end of the elastic gasket (25) is inserted into the elastic gasket (25) and the second shaft sleeve (24) and is threadedly connected to the right end of the torsional energy absorbing component (21); the two ends of the sleeve (22) of the torsional energy absorbing assembly (2) are fixedly connected to the inner side walls of the second support plate (142) and the third support plate (151), respectively.

8. The explosion-proof seat energy absorption device according to claim 2, characterized in that: The left and right ends of the torsional energy absorbing component (21) are both hexagonal prism structures, the left end of the torsional energy absorbing component (21) is inserted into the first shaft sleeve (23), and the right end of the torsional energy absorbing component (21) is matched and inserted into the second shaft sleeve (24).

9. The explosion-proof seat energy absorption device according to claim 3, characterized in that: Two bearings (39) are relatively fixedly connected to the inner side walls of the upper middle portions of the left bracket (311) and the right bracket (312), and the two ends of the rotating shaft (32) are respectively connected to the two bearings (39) by interference fit; the rear ends of the rack (351) and the trigger pressing piece (352) are fixedly connected, and together they constitute a rack trigger pressing piece assembly (35).

10. A vehicle, characterized in that: It comprises the explosion-proof seat energy absorption device as described in any one of claims 1-9.

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