Highway crash barrier with deceleration energy dissipation function and construction method thereof

Abstract

The application relates to a highway anti-collision guard rail with a deceleration energy consumption function and a construction method thereof, which comprises a supporting column, a vertically-extending rear cover plate is fixedly connected to one side of the upper end of the supporting column, a toothed anti-collision plate is arranged on the other side of the supporting column and is in sliding connection with the rear cover plate, convex teeth are arranged on the inner end surface of the toothed anti-collision plate in an upper and lower interval mode, a friction plate is fixedly connected to the inner side of the rear cover plate, and a friction tooth for facilitating dislocation insertion with the convex teeth is fixedly arranged on the side of the friction plate and the toothed anti-collision plate, a plurality of ball-bearing sliding pull rods are fixedly arranged on the inner end of the toothed anti-collision plate, the ball-bearing sliding pull rods horizontally extend towards the rear cover plate and are provided with grooves at the end portions, a gear device is engaged with the grooves through a first gear rack, and the top end of the gear device is engaged with a second gear rack fixedly connected to the rear cover plate. The anti-collision guard rail is convenient to install, the energy consumption resistance is variable, and in addition to preventing vehicles from jumping over the guard rail, the anti-collision guard rail has good protection ability for dangerous situations such as brake failure on a downhill, difficult braking in rainy and snowy weather and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of expressway crash barrier with deceleration energy dissipation function and its construction method. BACKGROUND

[0002] Expressway vehicle travels fast and there are more heavy trucks, most of the kinetic energy of vehicle, if directly rely on the plastic deformation of crash barrier energy dissipation is difficult to completely absorb the kinetic energy of vehicle impact, prone to major traffic accidents such as vehicle flying guardrail.Energy dissipation effect is poor in the case of continuous downhill vehicle brake failure, vehicle difficult to stop in rain and snow weather, etc. SUMMARY

[0003] In view of the deficiencies of the prior art, the technical problem to be solved by the present application is to provide an expressway crash barrier with deceleration energy dissipation function and its construction method, to realize the deflection of impact direction in the initial stage of impact, and to increase the energy dissipation efficiency during movement, the device is designed with friction plate and crash plate, the friction plate and the crash plate are tightly attached through the engagement and relative movement of the rack and pinion device to increase the energy dissipation resistance, and the deflection of the impact direction in the initial stage is realized.A gear device is provided with a wheel disc with a ratchet cooperating with a ratchet planetary carrier to ensure that the huge impact force in the impact moment will not damage the gear device.In order to facilitate replacement of friction plate, gear device and other components after damage, the device is provided with an inspection hole, and the crash rubber plate and the crash plate are installed by bolts for easy disassembly.

[0004] To solve the above technical problems, the technical scheme of the present application is: an expressway crash barrier with deceleration energy dissipation function, comprising a support column, a vertically extending rear cover plate is fixedly connected to one side of the upper end of the support column, and a toothed crash plate is arranged on the other side and is slidably connected with the rear cover plate, the inner end face of the toothed crash plate is provided with protrusions in an upper and lower spaced manner, the inner side of the rear cover plate is fixedly connected with a friction plate, and a friction tooth is fixedly arranged on the side of the friction plate and the toothed crash plate to facilitate the insertion of the friction tooth with the protrusions, a plurality of ball sliding pull rods are also fixedly arranged on the inner end of the toothed crash plate, the ball sliding pull rods extend horizontally towards the rear cover plate and are provided with recesses at the end portions, the recesses are engaged with a gear device through a first rack, and the top end of the gear device is engaged with a second rack fixedly connected to the rear cover plate.

[0005] Further, the gear device comprises a driven gear engaged with the first rack, the top end of the driven gear is coaxially fixedly connected with a wheel disc with ratchet teeth on the inner periphery, the wheel disc is coaxially provided with a ratchet planetary carrier, and a plurality of planetary gears are connected through the upper end of the ratchet planetary carrier, the planetary gears are driven to rotate through a sun gear between them, the upper portion of the sun gear is engaged with the second rack, and the planetary gears are engaged with a gear ring, which is limited by a gear ring limiting assembly.

[0006] Further, the gear ring limiting assembly comprises two adjusting sliders symmetrically arranged outside the gear ring, the top end of each adjusting slider is vertically provided with a insertion hole, the top end of the gear ring is coaxially provided with an annular limiting plate, the bottom end of the annular limiting plate is fixedly provided with an insertion rod which is inserted and connected with the insertion hole, the near-top end of the adjusting slider is fixedly provided with a flange plate along the outer periphery thereof, and the flange plate and the annular limiting plate are connected through a spring; the lower end surface of the annular limiting plate is uniformly provided with a plurality of pressing rods along the circumferential portion thereof, and the top end of the gear ring is fixedly provided with a limiting protrusion corresponding to the pressing rods to hinder relative rotation.

[0007] Further, the bottom of each adjusting slider is provided with a rotating wheel, and the upper surface of the ball-bearing sliding pull rod is provided with an adjusting sliding groove for the rotating wheel to slide along the length direction thereof.

[0008] Further, the array of ball-bearing sliding pull rods is fixedly connected to the toothed anti-collision plate and symmetrically arranged on the upper and lower sides of the convex teeth, the upper and lower end surfaces of the ball-bearing sliding pull rods are arrayed with balls for sliding, the inner side of the rear cover plate extends a fixed plate for cooperating with the balls to slide, and the lower end of the driven gear and the upper end of the sun gear are fixedly provided with sliding blocks, and the fixed plate is provided with sliding grooves for cooperating with the sliding blocks to slide.

[0009] Further, the outer side of the toothed anti-collision plate is parallelly provided with an anti-collision rubber plate, the inner side of the anti-collision rubber plate is provided with an installation groove for inserting and installing the shear force transmission rod, the shear force transmission rod is correspondingly arranged with the ball-bearing sliding pull rod, and the end portion of the shear force transmission rod penetrates the toothed anti-collision plate and is inserted into the ball-bearing sliding pull rod to transmit impact force, the inner side of the anti-collision rubber plate is fixedly provided with two groups of T-shaped rubber plate sliding blocks, the inner ends of the rubber plate sliding blocks are rotatably connected with pulleys, and the fixed plates located at the top and the bottom are provided with special-shaped sliding grooves for cooperating with the rubber plate sliding blocks to slide.

[0010] Further, the fixed plate comprises a lower layer sliding groove lower plate, a lower layer sliding groove upper plate, an upper layer sliding groove lower plate, and an upper layer sliding groove upper plate, wherein the lower layer sliding groove lower plate and the lower layer sliding groove upper plate form a group, the upper end of the lower layer sliding groove lower plate and the lower end of the lower layer sliding groove upper plate are provided with sliding grooves vertically extending with the ball-bearing sliding pull rod, and the sliding grooves are connected with the sliding blocks to slide, the upper layer sliding groove lower plate and the upper layer sliding groove upper plate form a group, and the upper layer and the lower layer are the same.

[0011] Further, a plurality of horizontal support columns are extended from the rear cover plate to fix a friction plate, the friction plate is clamped by two fixed plates located in the middle portion, and the two fixed plates are supported and fixed by a plurality of vertical support columns.

[0012] Further, the rear cover plate and the top of the anti-collision rubber plate are covered with an upper cover plate, the upper cover plate is fixed on the rear cover plate, the toothed anti-collision plate is provided with two groups, two groups of anti-collision rubber plates are provided, and a flexible waterproof rubber plate is arranged between the two groups of anti-collision rubber plates, and the upper and lower ends of the flexible waterproof rubber plate are fixed on the upper cover plate and the support column respectively.

[0013] A construction method of a highway anti-collision fence with a deceleration energy consumption function is performed according to the following steps: S1: drilling holes at the roadside to anchor the support column into the roadside installation position; S2: after the installation of the support column is completed, the rear cover plate is installed first, then the fixed plate is installed from bottom to top, and is fixed on the rear cover plate by bolts; S3: the friction plate is installed by horizontal support columns and bolts; S4: the toothed anti-collision plate and the sliding rod with balls are connected by bolts and inserted into the corresponding position; S5: the gear device and the second rack are installed at the end of the sliding rod with balls; S6: the rubber plate slider with pulleys is installed at the corresponding position of the special-shaped sliding groove; S7: the shearing force transmission rod is fixed in the groove in the anti-collision rubber plate and inserted into the corresponding hole position on the toothed anti-collision plate; S8: the rubber plate slider with pulleys and the anti-collision rubber plate are fixed by bolts; S9: the flexible waterproof rubber plate is installed between the anti-collision rubber plates, and finally the upper cover plate is installed to clamp and fix the flexible waterproof rubber plate.

[0014] Compared with the prior art, the present application has the following beneficial effects:

[0015] 1) Easy and fast installation, no need for formwork and no need for excavating the road surface; 2) The energy consumption resistance is controlled by the vehicle movement distance to realize that the impact direction is deflected at the moment of impact and the energy consumption ability is increased with the increase of the movement distance; 3) In the case of brake failure on steep slope sections, vehicle skidding in rainy and snowy weather, etc., the vehicle can be close to the device for energy consumption and deceleration; 4) The gear device has an adjustable maximum torque limiting function, which can slide for a long distance for energy consumption for vehicles with large kinetic energy without being stuck due to too large resistance; 5) During the long distance sliding of the vehicle, multiple energy consumption modules can be driven to increase the energy consumption efficiency; 6) The gear device is provided with a ratchet gear to protect the gear at the moment of impact; 7) A maintenance hole is arranged at the rear side of the device to facilitate disassembly and daily maintenance, and the friction plate and the gear device can be replaced more conveniently after being damaged; 8) The device is composed of energy consumption modules and anti-collision modules, and the gaps between the modules are filled with flexible waterproof rubber to prevent rust caused by rainwater and reduce the resistance of direction deflection at the moment of impact; 9) There is a cavity between the toothed anti-collision plate and the anti-collision rubber plate, which can reduce the damage to the vehicle caused by impact and enable the vehicle to better contact the rubber surface to drive the energy consumption modules for energy consumption; 10) There is no damper in the device, and there is no risk of liquid leakage.

[0016] The present application will be further described in detail below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic diagram of the embodiment of the present application;

[0018] Figure 2 is a side view of the embodiment of the present application;

[0019] Figure 3 is a connection schematic diagram of the toothed anti-collision plate and the gear device in the embodiment of the present application;

[0020] Figure 4 is a disassembly view of the gear ring limiting assembly in the embodiment of the present application;

[0021] Figure 5 is a disassembly view of the gear device in the embodiment of the present application;

[0022] Figure 6 is a disassembly view of the internal planetary gear structure of the gear device in the embodiment of the present application;

[0023] Figure 7 is a structural schematic diagram of the gear ring limiting assembly in the embodiment of the present application;

[0024] Figure 8 is a mounting schematic diagram of the energy consumption component in the embodiment of the present application;

[0025] Figure 9 is a disassembly view of the front side of the energy consumption component in the embodiment of the present application;

[0026] Figure 10 is a mounting schematic diagram of the anti-collision component and the ordinary anti-collision plate in the embodiment of the present application;

[0027] Figure 11 is a disassembly view of the anti-collision component in the embodiment of the present application;

[0028] Figure 12 is a structural schematic diagram of the ball sliding pull rod in the embodiment of the present application.

[0029] In the diagram: 1-Support column; 2-Bolt; 3-Lower slide plate; 4-Rear cover plate; 5-Upper slide plate; 6-Horizontal support column; 7-Vertical support column; 8-Lower slide plate; 9-Inspection hole; 10-Sliding tie rod with ball bearings; 11-Upper slide plate; 12-Protruding tooth; 13-Upper cover plate; 14-Second rack; 15-Gear assembly; 16-Friction plate; 17-Flexible waterproof rubber sheet; 18-Anti-collision rubber sheet; 19-Friction tooth; 20-Rubber sheet slider; 21-Groove; 22-Shear transmission rod; 23-Toothed anti-collision plate; 24-First rack; 25-Driven gear; 26-Disc; 27-Ratchet planetary carrier; 28-Planet gear; 29-Gear ring; 30-Gear ring limiting assembly; 31-Sun gear; 32-Adjusting slider; 34-Rotating wheel; 35-Flange plate; 36-Spring; 37-Insertion rod; 38-Annular limiting plate; 39-Pressure rod; 40-Ordinary anti-collision plate; 41-Limiting protrusion; 42-Adjusting slide groove; 43-Ball bearing; 44-Slider; 45-Slide groove; 46-Mounting groove; 47-Pulley; 48-Irregular slide groove. Detailed Implementation

[0030] To make the above features and advantages of the present invention more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings for detailed explanation.

[0031] like Figures 1-12 As shown, a highway crash barrier with deceleration and energy dissipation function includes a support post 1. A vertically extending rear cover plate 4 is fixedly connected to one side of the upper end of the support post, and a toothed crash plate 23 is provided on the other side, parallel to and slidably connected to the rear cover plate. The inner end face of the toothed crash plate has protruding teeth 12 spaced vertically. A friction plate 16 is fixedly connected to the inner side of the rear cover plate, and friction teeth 19 are fixed on the side of the friction plate and the toothed crash plate facing each other to facilitate misaligned insertion with the protruding teeth. The protruding teeth are all made of rubber, and the protruding teeth and friction teeth are... All of them have a cross-section that gradually increases from the opposite end toward the main body end, that is, the opposite end is a pointed end to facilitate insertion, and the cross-section increases the contact area to increase friction. The inner end of the toothed anti-collision plate is also fixed with several ball-bearing sliding rods 10. The ball-bearing sliding rods all extend horizontally toward the rear cover plate and have grooves 21 at their ends. The grooves are all fitted with gear devices by first racks 24. The top of the gear devices meshes with second racks 14 fixed to the rear cover plate. The components between the rear cover plate and the toothed anti-collision plate constitute an energy-consuming component.

[0032] In this embodiment of the invention, the first rack is positioned in the groove according to the direction of ratchet rotation, which ensures that the driven gear rotates and drives the first rack to move toward the rear cover plate.

[0033] In the embodiment of the present application, the rear cover plate is provided with an inspection hole 9 for facilitating replacement and maintenance, so that the friction plate and gear device can be conveniently replaced after being damaged.

[0034] In the embodiment of the present application, the gear device comprises a driven gear 25 engaged with the first rack, and a disc 26 coaxially connected to the top end of the driven gear and provided with ratchet teeth on the inner periphery, a ratchet planetary carrier 27 coaxially arranged in the disc, a plurality of planetary gears 28 connected through the upper end of the ratchet planetary carrier, a sun gear 31 driving the planetary gears to rotate, the upper part of the sun gear being engaged with the second rack, and a gear ring 29 engaged with the planetary gears, the gear ring being limited by a gear ring limiting assembly 30.

[0035] In the embodiment of the present application, the gear ring limiting assembly comprises two adjusting sliding blocks 32 symmetrically arranged outside the gear ring, the top end of each adjusting sliding block being vertically provided with a insertion hole, the top end of the gear ring being coaxially provided with an annular limiting plate 38, the bottom end of the annular limiting plate being fixedly provided with an insertion rod 37 inserted into the insertion hole, the near-top end of the adjusting sliding block being fixedly provided with a flange plate 35 along the outer periphery thereof, the flange plate being connected with the annular limiting plate through a spring 36, the lower end surface of the annular limiting plate being uniformly provided with a plurality of pressing rods 39 along the circumferential part thereof, and the top end of the gear ring being fixedly provided with a limiting protrusion 41 corresponding to the pressing rods to hinder relative rotation.

[0036] In the embodiment of the present application, the bottom part of each adjusting sliding block is provided with a rotating wheel 34, and the upper surface of the ball-bearing sliding pull rod is provided with an adjusting sliding groove 42 for the rotating wheel to slide along the length direction thereof.

[0037] In the embodiment of the present application, the array of ball-bearing sliding pull rods is fixedly connected to the toothed anti-collision plate and symmetrically arranged on the upper and lower sides of the convex teeth, the upper and lower end surfaces of the ball-bearing sliding pull rod are arrayed with balls 43 for sliding, the inner side of the rear cover plate extends a fixed plate for sliding with the balls, the lower end of the driven gear and the upper end of the sun gear are fixedly provided with sliding blocks 44, and the fixed plate is provided with sliding grooves 45 for sliding with the sliding blocks.

[0038] In the embodiment of the present application, the outer side of the toothed anti-collision plate is parallelly provided with anti-collision rubber plates, the inner side surface of the anti-collision rubber plate is provided with mounting grooves 46 for the shear force transmission rods to be inserted and mounted, the shear force transmission rods are correspondingly arranged with the ball-bearing sliding pull rods, the end part of the shear force transmission rod penetrates through the toothed anti-collision plate and is inserted into the ball-bearing sliding pull rod to transmit impact force, the inner side surface of the anti-collision rubber plate is fixedly provided with two groups of T-shaped rubber plate sliding blocks 20, the inner end of the rubber plate sliding block is rotatably connected with a pulley 47 on the upper and lower end surfaces, the fixed plates located at the top and bottom are provided with special-shaped sliding grooves 48 for sliding with the rubber plate sliding blocks, and the rubber plate sliding block, the special-shaped sliding groove, the shear force transmission rod and the anti-collision rubber plate form an anti-collision component.

[0039] In the embodiment of the present application, the fixed plate comprises a lower layer sliding groove lower plate 3, a lower layer sliding groove upper plate 5, an upper layer sliding groove lower plate 8, and an upper layer sliding groove upper plate 11, wherein the lower layer sliding groove lower plate and the lower layer sliding groove upper plate form a group, the upper end of the lower layer sliding groove lower plate and the lower end of the lower layer sliding groove upper plate are both provided with a sliding groove vertically extending with the ball sliding pull rod, and the sliding groove is connected with the sliding block; the upper layer sliding groove lower plate and the upper layer sliding groove upper plate form a group, and the upper layer is the same as the lower layer.

[0040] In the embodiment of the present application, a plurality of horizontal support columns 6 are extended from the rear cover plate to fix the friction plate, the friction plate is clamped between the two fixed plates located in the middle, and the two fixed plates are supported and fixed by a plurality of vertical support columns 7.

[0041] In the embodiment of the present application, the upper cover plate 13 is arranged between the rear cover plate and the top of the anti-collision rubber plate, the upper cover plate is fixedly connected to the rear cover plate, the toothed anti-collision plate is provided with two groups, two groups of anti-collision rubber plates are arranged correspondingly, a flexible waterproof rubber plate is arranged between the two groups of anti-collision rubber plates, and the upper end and the lower end of the flexible waterproof rubber plate are fixed to the upper cover plate and the support column respectively.

[0042] A construction method of a highway anti-collision fence with a speed reduction and energy consumption function is performed according to the following steps: S1: punching holes on the roadside to anchor the support column into the roadside installation position; S2: after the installation of the support column is completed, the rear cover plate is installed first, then the fixed plate is installed from bottom to top, and the fixed plate is fixed to the rear cover plate by bolts; S3: the friction plate is installed by horizontal support columns and bolts; S4: the toothed anti-collision plate and the ball sliding pull rod are connected by bolts and inserted into the corresponding position; S5: the gear device and the second rack are installed at the end of the ball sliding pull rod; S6: the rubber plate sliding block with a pulley is installed at the corresponding position of the special-shaped sliding groove; S7: the shearing force transmission rod is fixed and inserted into the corresponding hole position on the toothed anti-collision plate by being placed into the groove in the anti-collision rubber plate; S8: the rubber plate sliding block with a pulley and the anti-collision rubber plate are fixed by bolts; S9: the flexible waterproof rubber plate is installed between the anti-collision rubber plates, and finally the upper cover plate is installed to clamp and fix the flexible waterproof rubber plate.

[0043] In the embodiment of the present application, as shown in Figures 10-11 The toothed anti-collision plate can be replaced by a common anti-collision plate, or the toothed anti-collision plate and the common anti-collision plate 40 can be used synchronously.

[0044] Considering that the vehicle is mostly oblique when hitting the guardrail, the concave deformation of the anti-collision rubber plate 18 at the moment of vehicle collision can reduce the damage to the vehicle, and the collision of the anti-collision rubber plate 18 with the toothed anti-collision plate 23 or the ordinary anti-collision plate 40 when the deformation is large can prevent the vehicle from rushing out of the guardrail; at the moment of collision to the energy consumption component, the impact will make the ball sliding pull rod 10 move backward, but under the action of the shear force transmission rod, the vertical impact force is absorbed and the oblique impact force is transmitted, that is, the ball sliding pull rod is driven to slide along the sliding groove, further driving the gear device to move, and the relative position generated makes the sun gear rotate, drives the planetary gear and the ratchet planetary carrier to rotate, further drives the wheel disc and the driven gear to rotate, finally drives the first rack and the ball sliding pull rod to move towards the rear cover plate, so that the teeth and the friction teeth are further inserted tightly, the friction force is increased, and the oblique impact force is relieved; in order to prevent the destruction of the gear device by the huge impact force, the wheel disc 26 and the ratchet planetary carrier 27 are arranged to realize the one-way force transmission of the gear device to the ball sliding pull rod 10; in the case of brake failure, large energy collision and the like, the device can allow the vehicle to slide for a long distance in the length direction of the guardrail to consume energy, the meshing of the sun gear 31 with the planetary gear 28 and the gear ring 29 with the sliding block realizes the clamping of the friction plate 16 and the toothed anti-collision plate 23 to increase the energy consumption efficiency, and in order to prevent the clamping force from being too large to cause the sliding difficulty or jamming of the energy consumption component, the downward resistance of the gear ring 29 is adjusted by adjusting the spring tension adjusting device 35 in the adjusting sliding block 32, when the torsion of the gear device 15 is too large, the planetary gear 28 will not drive the ratchet planetary carrier 27 to rotate, but will make the gear ring 29 overcome the tension of the spring 36 to make the gear ring limiting frame 38 move upward, and then the gear ring 29 rotates, the ratchet planetary carrier 27 no longer rotates, that is, the ball sliding pull rod 10 is no longer tensioned to realize the limitation of sliding resistance.

[0045] The present application is not limited to the above-mentioned best embodiment, and anyone can derive other various forms of highway anti-collision guardrails with deceleration and energy consumption functions and construction methods therefor under the inspiration of the present application. Any equivalent changes and modifications made within the scope of the patent application of the present application shall be covered by the present application.

Claims

1. A highway crash barrier with deceleration and energy dissipation function, characterized in that: The utility model provides a support column, the rear cover plate of support column upper end one side is fixedly connected with vertical extension, and the other side is provided with the toothed crashproof board with rear cover plate parallel and opposite sliding connection, the inside end surface of toothed crashproof board is provided with the convex tooth that separates upward and downward, the inside of rear cover plate is fixedly connected with the friction plate, and the friction tooth that is favorable with convex tooth misplacement joint is fixed on the side of friction plate and toothed crashproof board opposite, the inside end of toothed crashproof board is also fixed with a plurality of ball sliding pull rod, and the ball sliding pull rod all extend towards rear cover plate horizontally and set recess in end portion, the recess is meshed with gear device through first rack, and the top of gear device is meshed with the second rack that is fixed on rear cover plate; The gear device comprises a driven gear meshed with the first rack, a wheel disc with internal circumferential ratchet teeth coaxially fixed on the top of the driven gear, a ratchet wheel planetary carrier coaxially arranged in the wheel disc, a plurality of planetary gears connected through the upper end of the ratchet wheel planetary carrier, the planetary gears driven to rotate through a sun gear, the sun gear meshed with the second rack at the upper part, the planetary gears meshed with a gear ring, and the gear ring limited by a gear ring limiting assembly; The gear ring limiting assembly comprises two adjusting sliding blocks symmetrically arranged at the outer of the gear ring, the top of the adjusting sliding blocks is vertically provided with a insertion hole, the top of the gear ring is coaxially provided with an annular limiting plate, the bottom of the annular limiting plate is fixedly provided with an insertion rod inserted and connected with the insertion hole, the near-top of the adjusting sliding blocks is fixedly provided with a flange plate along the outer circumference, and the flange plate and the annular limiting plate are connected through a spring; the lower end surface of the annular limiting plate is uniformly distributed with a plurality of pressing rods along the circumference, and the top of the gear ring is fixedly provided with a limiting protrusion corresponding to the pressing rods to hinder relative rotation.

2. The highway crash barrier with deceleration and energy dissipation function according to claim 1, characterized in that: The bottom of the adjusting sliding block is provided with a rotating wheel, and the upper surface of the ball sliding pull rod is provided with an adjusting sliding groove for the rotating wheel to slide along the length direction.

3. The highway crash barrier with deceleration and energy dissipation function according to claim 2, characterized in that: The ball sliding pull rod is fixedly connected on the toothed crashproof board and symmetrically arranged on the upper and lower sides of the convex tooth, the upper and lower end surfaces of the ball sliding pull rod are arrayed with balls for sliding, the inside of the rear cover plate extends a fixed plate for sliding with the balls, the lower end of the driven gear and the upper end of the sun gear are fixedly provided with sliding blocks, the fixed plate is provided with a sliding groove matched with the sliding blocks, and the second rack is fixedly connected on the fixed plate.

4. The highway crash barrier with deceleration and energy dissipation function according to claim 3, characterized in that: The outer side of the toothed crashproof board is parallel provided with a crashproof rubber plate, the inner side of the crashproof rubber plate is provided with an installation groove for the shear force transmission rod to be inserted and installed, the shear force transmission rod is correspondingly arranged with the ball sliding pull rod, and the end of the shear force transmission rod penetrates the toothed crashproof board and is inserted into the ball sliding pull rod to transmit the impact force.

5. The highway crash barrier with deceleration and energy dissipation function according to claim 4, characterized in that: The inner side of the crashproof rubber plate is fixedly provided with two groups of T-shaped rubber plate sliding blocks, the inner end of the rubber plate sliding block is rotatably connected with a pulley on the upper and lower end surfaces, and the fixed plates at the top and bottom are provided with a special-shaped sliding groove matched with the sliding of the rubber plate sliding block.

6. The highway crash barrier with deceleration and energy dissipation function according to claim 5, characterized in that: The rear cover plate extends a plurality of horizontal support columns to fix the friction plate, the friction plate is clamped through the two fixed plates at the middle, and the two fixed plates are supported and fixed through a plurality of vertical support columns.

7. The highway crash barrier with deceleration and energy dissipation function according to claim 6, characterized in that: The upper cover plate is fixed on the rear cover plate, the toothed crashproof plate is provided with two groups, two groups of crashproof rubber plates are provided correspondingly, and flexible waterproof rubber plates are arranged between the two groups of crashproof rubber plates, and upper and lower ends of the flexible waterproof rubber plates are fixed on the upper cover plate and the support column respectively.

8. A construction method of a highway crash barrier with a deceleration energy dissipation function, characterized by, The highway crash barrier with the function of speed reduction and energy consumption is adopted, and the following steps are performed: S1: the support column is anchored into the roadside installation position by punching on the roadside; S2: after the support column is installed, the rear cover plate is installed first, then the fixed plates are installed from bottom to top, and the fixed plates are fixed on the rear cover plate by bolts; S3: the friction plate is installed by the horizontal support column and the bolt fixing; S4: the toothed crashproof plate and the sliding rod with balls are connected by bolts and inserted into the corresponding position; S5: the gear device and the second rack are installed at the end of the sliding rod with balls; S6: the rubber plate sliding block with a pulley is installed at the corresponding position of the special-shaped sliding groove; S7: the shearing force transmission rod is fixed in the groove in the crashproof rubber plate and inserted into the corresponding hole position on the toothed crashproof plate; S8: the rubber plate sliding block with a pulley and the crashproof rubber plate are fixed by bolts; S9: the flexible waterproof rubber plate is installed between the crashproof rubber plates, and finally the upper cover plate is installed to clamp and fix the flexible waterproof rubber plate.

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