A special vehicle lightning protection seat energy absorber

Abstract

The present invention provides a lightning protection seat energy absorber for special vehicles, which includes a piston, a gland, a buffer sheet, a positioning block, a cylinder barrel, a cylinder head and fixing bolts. Among them, the piston and the cylinder head are on the same straight line, which can make the tensile force and the explosion impact force in the same direction, with a high utilization rate of the buffer stroke, 20% higher than that of similar products; the buffer sheet is designed in a "W" shape and arranged in a double-sheet stacking manner, with a unit weight bearing capacity more than 15% higher than that of similar products. When the seat of a special vehicle encounters the impact of a landmine explosion, the energy absorber of the present invention can quickly buffer and absorb energy within a short stroke, maximizing the protection of the lives of the occupants and reducing the injuries of the occupants. The energy absorber is simple, reliable, compact in structure, high in space utilization rate, large in buffer force and light in weight.

Description

Technical Field

[0001] The invention belongs to the technical field of special vehicle lightning protection equipment, and in particular relates to a special vehicle lightning protection seat energy absorber. Background Art

[0002] At present, most of the mine-proof seats for special vehicles in my country are wall-mounted. The seats cannot effectively dissipate the energy of the blast wave caused by the mine impact within a short stroke, and therefore cannot meet the requirements for protecting the lives of the occupants. Under the condition of a large relative velocity formed when a mine explodes, the traditional hydraulic shock absorber is similar to a rigid body and cannot quickly attenuate the impact energy generated by the explosion within a short stroke, which will cause a large impact acceleration to the occupants and cause personal injury. In addition, the traditional hydraulic shock absorber occupies a large space. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] The present invention provides a mine-proof seat energy absorber for special vehicles to solve the technical problem that when a special vehicle encounters a mine explosion, the seat can quickly buffer and absorb energy within a short stroke to reduce the degree of injury to the occupants caused by the mine explosion.

[0005] (II) Technical solution

[0006] In order to solve the above technical problems, the present invention proposes a special vehicle lightning protection seat energy absorber, which includes a piston, a pressure cover, a buffer sheet, a positioning block, a cylinder, a cylinder cover and a fixing bolt; wherein,

[0007] The positioning block is a hollow cuboid structure with a stepped hole machined at the bottom, and a bolt mounting hole communicating with the stepped hole is machined at the top of the positioning block; a groove for ensuring the buffer piece to fall into and be positioned is machined on the top plane of the positioning block, and the edge part in contact with the buffer piece around the top plane is machined into an arc shape; an installation hole capable of being connected to the vehicle body bracket through a pin shaft is arranged at the top of the piston, and a threaded hole is machined at the middle position of the bottom of the piston; two buffer pieces are fixed in the groove on the top plane of the positioning block in a cross-overlapping form, and a round hole is machined at the middle position of the buffer piece; the fixing bolt is screwed into the bolt mounting hole in sequence from the bottom stepped hole of the positioning block, passes through the two buffer pieces, and is screwed tightly with the threaded hole at the bottom of the piston, fastening the positioning block, the buffer pieces and the piston into a whole, so that the two buffer pieces are clamped between the piston and the positioning block; the positioning block, the buffer pieces and the piston as a whole are inserted into the cylinder barrel from the top end of the cylinder barrel; the gland is arranged on the outer periphery of the piston in an interference fit manner, is inserted into the cylinder barrel from the top end of the cylinder barrel, and is welded to the cylinder barrel as a whole, and a gap is left between the piston and the gland; after the two free ends of the buffer piece are bent, the end part is clamped between the gland and the inner wall of the cylinder barrel, and the height exceeds the top plane of the positioning block; the length of the positioning block is greater than the length of the bent part of the buffer piece; an installation hole capable of being connected to the seat hanger shaft through a pin shaft is arranged at the bottom of the cylinder head cover, and the top of the cylinder head cover is welded to the bottom of the cylinder barrel as a whole; a groove is machined at the middle position of the bottom of the cylinder head cover, and the bottom end of the positioning block extends into the groove.

[0008] Further, positioning claws are arranged at the top of the positioning block; positioning grooves corresponding to the positioning claws are arranged at the bottom of the piston.

[0009] Further, the length of the positioning block exceeds twice the rising height stroke of the buffer piece.

[0010] Further, welding chamfers are left at the contact positions between the cylinder head cover and the cylinder barrel.

[0011] Further, observation holes are machined on the periphery of the cylinder barrel.

[0012] (III) Beneficial effects

[0013] The present invention provides a lightning protection seat energy absorber for special vehicles, including a piston, a gland, buffer pieces, a positioning block, a cylinder barrel, a cylinder head cover and fixing bolts. Among them, the piston and the cylinder head cover are on the same straight line, which can make the tensile force and the explosion impact force in the same direction, with a high utilization rate of the buffer stroke, 20% higher than that of similar products; the buffer pieces are designed in a "W" shape and arranged in a double-piece superposition manner, and the unit weight bearing capacity is more than 15% higher than that of similar products. When the seat of the special vehicle encounters a mine explosion impact, the energy absorber of the present invention can quickly buffer and absorb energy within a short stroke, protect the life safety of the crew to the greatest extent, and reduce the injury of the crew. The energy absorber is simple and reliable, has a compact structure, high space utilization rate, large buffer force and light weight. Description of the drawings

[0014] Figure 1 Schematic diagram of the internal structure of the lightning protection seat energy absorber according to an embodiment of the present invention;

[0015] Figure 2 Schematic diagram of the external structure of the lightning protection seat energy absorber according to an embodiment of the present invention. Detailed implementation manners

[0016] To make the objectives, contents and advantages of the present invention clearer, the following further describes in detail the specific implementation manners of the present invention with reference to the accompanying drawings and embodiments.

[0017] This embodiment provides a lightning protection seat energy absorber for special vehicles, and its structure is as shown in Figure 1 and 2 and mainly includes a piston 1, a gland 2, a buffer sheet 3, a positioning block 4, a cylinder barrel 5, a cylinder head 6 and a fixing bolt 7.

[0018] The positioning block 4 is a hollow cuboid structure with a stepped hole machined at the bottom. The top of the positioning block 4 is machined with a bolt mounting hole communicating with the stepped hole, which is not only convenient for the installation of the fixing bolt 7, but also can achieve weight reduction. The top plane of the positioning block 4 is machined with a groove for ensuring that the buffer sheet 3 falls into and is positioned. The edge part of the top plane in contact with the buffer sheet 3 around the periphery is machined into an arc shape to increase the contact area between the buffer sheet 3 and the positioning block 4, avoid scratching and breaking of the surface of the buffer sheet 3, increase the bending radius of the buffer sheet 3, reduce the pressure concentration during the bending process, and enhance the bending processability. Four positioning claws are provided at the top of the positioning block 4.

[0019] The top of the piston 1 is provided with a mounting hole that can be connected to the vehicle body bracket through a pin shaft. Four positioning grooves corresponding to the positioning claws are provided at the four corners of the bottom of the piston 1, and a threaded hole is machined at the middle position of the bottom. The grooves at the four corners of the bottom of the piston 1 cooperate with the four positioning claws at the top of the positioning block 4 for positioning, which can ensure the reliable fixation of the buffer sheet 3 during installation and stretching deformation.

[0020] Two buffer sheets 3 are fixed in the groove of the top plane of the positioning block 4 in a cross-overlapping form. A round hole is machined at the middle position of the buffer sheet 3. The fixing bolt 7 is sequentially screwed into the bolt mounting hole from the bottom stepped hole of the positioning block 4, passes through the two buffer sheets 3, and is screwed tightly with the threaded hole at the bottom of the piston 1, thereby fastening the positioning block 4, the buffer sheet 3 and the piston 1 into one body, so that the two buffer sheets 3 are clamped between the piston 1 and the positioning block 4.

[0021] The positioning block 4, the buffer piece 3, and the piston 1 are inserted into the interior of the cylinder barrel 5 as a whole from the top end of the cylinder barrel 5. The gland 2 is arranged on the outer periphery of the piston 1 in an interference fit manner and is inserted into the cylinder barrel 5 from the top end of the cylinder barrel 5 and welded to the cylinder barrel 5 as a whole. A gap is left between the piston 1 and the gland 2 to facilitate the pulling out of the buffer piece 3 and the positioning block 4 from the cylinder barrel 5.

[0022] After the two free ends of the buffer piece 3 are bent with a small radius, the end part is clamped between the gland 2 and the inner wall of the cylinder barrel 5, and the height exceeds the top plane of the positioning block 4.

[0023] The length of the positioning block 4 is greater than the length of the bent part of the buffer piece 3 and is designed to exceed twice the rising height stroke of the buffer piece 3, which can ensure that the buffer piece 3 is always in the constraint space between the positioning block 4 and the cylinder barrel 5 during the working stroke when being pulled out, increasing the guiding length and ensuring the stability of the tensile force value.

[0024] The bottom of the cylinder head 6 is provided with mounting holes that can be connected to the seat hanger shaft through pin shafts. The top of the cylinder head 6 is welded to the bottom of the cylinder barrel 5 as a whole, and welding chamfers are left at the contact positions between the cylinder head 6 and the cylinder barrel 5. A groove is machined at the middle position of the bottom of the cylinder head 6, and the bottom end of the positioning block 4 extends into this groove. The cylinder barrel 5 and the cylinder head 6 are designed in a split manner. After all components are assembled, the gland 2 and the cylinder barrel 5 are combined and welded into a cylinder assembly. This design can reduce the processing and manufacturing difficulty and cost and is convenient for installation.

[0025] To observe whether the buffer piece 3 is well installed in the cylinder barrel 5, observation holes are machined on all sides of the cylinder barrel 5, which is simple to operate, convenient, and reliable.

[0026] The piston 1 of this energy absorber is on the same straight line as the cylinder head 6, which can make the tensile force and the explosion impact force in the same direction, with a high utilization rate of the buffer stroke, 20% higher than that of similar products. The core energy-absorbing element of this energy absorber - the buffer piece is selected with a "W-shaped" design and arranged in a double-piece superposition manner, with a unit weight bearing capacity more than 15% higher than that of similar products.

[0027] When the mine explosion shock wave acts on the vehicle body and is transmitted to the seat, the piston 1 at the upper end of the seat energy absorber moves upward relative to the seat along with the vehicle body, driving the buffer piece 3 and the positioning block 4 to be pulled out along the pores of the gland 2. During this process, through the curling and stretching deformation of the buffer piece 3, the buffer absorption of the mine explosion energy can be realized, effectively protecting the lives of the vehicle passengers.

[0028] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can still be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A special vehicle lightning protection seat energy absorber, characterized in that The energy absorber includes a piston, a gland, a buffer sheet, a positioning block, a cylinder barrel, a cylinder head and fixing bolts; wherein, The positioning block is a hollow cuboid structure with a stepped hole machined at the bottom, and a bolt mounting hole communicating with the stepped hole is machined at the top of the positioning block; a groove for ensuring that the buffer sheet falls into and is positioned is machined on the top plane of the positioning block, and the edge part in contact with the buffer sheet around the top plane is machined into an arc shape; an installation hole capable of being connected to the vehicle body bracket through a pin shaft is arranged at the top of the piston, and a threaded hole is machined at the middle position of the bottom of the piston; two buffer sheets are fixed in the groove on the top plane of the positioning block in a cross-interleaved stacking form, and a round hole is machined at the middle position of the buffer sheet; the fixing bolt is screwed into the bolt mounting hole in sequence from the bottom stepped hole of the positioning block, passes through the two buffer sheets, and is screwed tightly with the threaded hole at the bottom of the piston, fastening the positioning block, the buffer sheet and the piston into a whole, so that the two buffer sheets are clamped between the piston and the positioning block; the positioning block, the buffer sheet and the piston as a whole are inserted into the cylinder barrel from the top end of the cylinder barrel; the gland is arranged on the outer periphery of the piston in an interference fit manner, is inserted into the cylinder barrel from the top end of the cylinder barrel, and is welded to the cylinder barrel as a whole, leaving a gap between the piston and the gland; after the two free ends of the buffer sheet are bent, the end parts are clamped between the gland and the inner wall of the cylinder barrel, and the height exceeds the top plane of the positioning block; the length of the positioning block is greater than the length of the bent part of the buffer sheet; positioning claws are arranged at the top of the positioning block; a positioning groove corresponding to the positioning claws is arranged at the bottom of the piston; the length of the positioning block exceeds twice the rising height stroke of the buffer sheet; an installation hole capable of being connected to the seat hanger shaft through a pin shaft is arranged at the bottom of the cylinder head, and the top of the cylinder head is welded to the bottom of the cylinder barrel as a whole; a groove is machined at the middle position of the bottom of the cylinder head, and the bottom end of the positioning block extends into the groove.

2. The energy absorber according to claim 1, wherein Welding chamfers are left at the contact positions between the cylinder head and the cylinder barrel.

3. The energy absorber according to claim 1, characterized in that Observation holes are machined around the cylinder barrel.

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