1. An energy-absorbing buffering expressway protective guard comprises a protective guard (1) arranged at the edge of a lane (0) and extending along the length direction of the lane (0), wherein the protective guard (1) comprises a plurality of stand columns (2) distributed at intervals and a protective guard main body (3) arranged on the stand columns (2);

the method is characterized in that: a plurality of impacted rotating assemblies for directly bearing vehicle impact are uniformly distributed on one side, close to the lane (0), of the guardrail main body (3) along the length direction of the guardrail main body (3), and each impacted rotating assembly comprises a swinging rod (11) protruding towards the lane (0) and a buffer cylinder (12) arranged on the swinging rod (11); the two ends of the swinging rod (11) and the guardrail main body (3) form rotating fit with the rotating center line in the vertical direction; two ends and the middle part of the swinging rod (11) are respectively provided with a first energy absorption buffer mechanism and a second energy absorption buffer mechanism;

two ends of the swinging rod (11) form a connecting section (13), a connecting hole is formed in the guardrail main body (3) at a position opposite to the connecting section (13), and the connecting section (13) penetrates through the connecting hole; the second energy absorption buffer mechanism comprises a fixing pile (27) fixedly arranged on the outer side of the guardrail main body (3) and a traction buffer assembly used for connecting the fixing pile (27) and the swinging rod (11); the traction buffering assembly comprises a first cable (28) and a deformation pull rod (29), one end of the first cable (28) penetrates through a guide hole formed in the guardrail main body (3) to be connected with the middle of the swing rod (11), the other end of the first cable (28) is connected with one end of the deformation pull rod (29), and the other end of the deformation pull rod (29) is fixedly connected with the fixing pile (27).

2. The energy-absorbing buffer highway guard rail of claim 1 wherein: one end of the first cable (28), which is opposite to the deformation pull rod (29), is fixedly connected with a wheel seat of the movable pulley (30), and one end of the deformation pull rod (29), which is opposite to the first cable (28), is fixedly connected with one end of the second cable (31); the other end of the second inhaul cable (31) is fixedly connected with the fixed pile (27) by winding around the wheel body of the movable pulley (30).

3. The energy-absorbing buffer highway guard rail of claim 2 wherein: the deformation pull rod (29) is in a spiral shape.

4. The energy-absorbing buffer highway guard rail of claim 3 wherein: still be provided with fixing base (32) on the ground in spud pile (27) outside, be provided with many suspension cables (33) between spud pile (27) and fixing base (32).

5. The energy-absorbing buffer highway guard rail of claim 4 wherein: the fixed seat (32) and the fixed pile (27) are anchored on the ground through a long anchor rod (34).

6. The energy-absorbing buffer highway guard rail of claim 5 wherein: and the second inhaul cable (31) and the deformation pull rod (29) are both arranged on the fixing pile (27) through a fixing ring (35).

7. The energy-absorbing buffer highway guard rail of claim 6 wherein: the inner side of the guide hole is clamped with a rotating ring (36), and the first inhaul cable (28) is in contact with the hole wall of the guide hole through the rotating ring (36).

8. The energy absorbing buffer highway guard rail of claim 7 wherein: the inner edge of the rotating ring (36) is rounded.

9. The energy absorbing buffer highway guard rail of claim 8 wherein: each oscillating rod (11) is correspondingly provided with two groups of traction buffer components.

10. The energy absorbing buffer highway guard rail of claim 9 wherein: the first energy absorption buffer mechanism comprises an inner twisting seat (14) and an outer twisting seat (15) which are sequentially arranged along the direction facing the end of the connecting section (13), and arc-shaped key teeth (16) which are meshed with each other are arranged on the opposite surfaces of the inner twisting seat (14) and the outer twisting seat (15); the centers of the outer twisting seat (15) and the inner twisting seat (14) are provided with center holes (17) matched with the connecting sections (13); the outer twisting seat (15) and the inner twisting seat (14) are sleeved outside the connecting section (13) through a central hole (17), the inner twisting seat (14) is fixedly connected with the guardrail main body (3), and the outer twisting seat (15) is in sliding fit with the connecting section (13) along the length direction of the connecting section (13); the first energy absorption buffer mechanism also comprises an elastic pressing component which is arranged on the connecting section (13) of one side of the outer hinge seat (15) far away from the inner hinge seat (14) and is used for pressing the outer hinge seat (15) against the inner hinge seat (14);

the elastic pressing assembly comprises an inner pressing disc (18) and an outer pressing disc (19) which are sequentially sleeved on the connecting section (13) along the direction towards the end of the connecting section (13), and the inner pressing disc (18), the outer pressing disc (19) and the connecting section (13) form sliding fit along the length direction of the connecting section (13); the elastic pressing assembly further comprises a buffer spring (20), and the buffer spring (20) is sleeved outside the connecting section (13) between the inner pressing disc (18) and the outer pressing disc (19); an end nut (21) is arranged at the end part of the connecting section (13), and the end nut (21) is in threaded fit with the connecting section (13); the outer pressing disc (19) is tightly pressed on the connecting section (13) through an end nut (21).

Background

The highway guard rail is a protection device used for enclosing a lane and preventing vehicles from rushing out of the lane and deviating from the lane, and can play a role in protecting pedestrians and vehicles and reducing accident loss. At present, the conventional road guard rail is a steel guard rail with a C-shaped or 3-shaped section of a guard rail main body formed by stamping, bending and the like. When the guardrail is in a collision accident, the guardrail main body has higher rigidity, although certain buffering can be performed on impact through the deformation of the guardrail main body, the buffering effect is not good, and the injury to vehicles and drivers and passengers on the vehicles is higher. The main road paving machine is superior to a main road paving machine which is simple in structure, low in cost and suitable for long-distance paving on a main road with low driving risk on an expressway. However, for a high-risk road section with a large curve, dark ice on the road surface and wet and slippery road surface, the phenomena of skidding, lane deviation and the like are easy to occur due to high driving risk, and due to the limitation of the simple protective guard, the simple protective guard cannot achieve a good protection effect, so that the driving safety hidden danger is increased. In addition, in theory, the guardrail main body is used as a final barrier in the driving protection process, the impact resistance of the guardrail main body per se is further enhanced, and although the impact resistance of the existing guardrail main body is improved to a certain extent compared with the traditional straight guardrail through the C-shaped and 3-shaped cross section shaping modes, the existing guardrail main body still has a certain risk of fracture under high-intensity impact, and the impact resistance strength of the guardrail main body is still to be improved.

Disclosure of Invention

The invention aims to provide an energy-absorbing buffering highway protective guard capable of quickly applying collision stress.

In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows: an energy-absorbing buffering expressway protective guard comprises a protective guard arranged at the edge of a lane and extending along the length direction of the lane, wherein the protective guard comprises a plurality of stand columns distributed at intervals and a protective guard body arranged on the stand columns;

a plurality of impacted rotating assemblies for directly bearing vehicle impact are uniformly distributed on one side, close to the lane, of the guardrail main body along the length direction of the guardrail main body, and each impacted rotating assembly comprises a swinging rod in a shape like a Chinese character 'ji' protruding towards the lane side and a buffer cylinder arranged on the swinging rod; the two ends of the swinging rod and the guardrail main body form rotating fit of a rotating center line in the vertical direction; a first energy absorption buffer mechanism and a second energy absorption buffer mechanism are respectively arranged at the two ends and the middle part of the swinging rod;

two ends of the swinging rod form a connecting section, a connecting hole is formed in the guardrail main body opposite to the connecting section, and the connecting section is arranged in the connecting hole in a penetrating manner; the second energy-absorbing buffer mechanism comprises a fixing pile fixedly arranged on the outer side of the guardrail main body and a traction buffer assembly used for connecting the fixing pile and the swinging rod; the traction buffering assembly comprises a first cable and a deformation pull rod, one end of the first cable penetrates through a guide hole formed in the guardrail main body to be connected with the middle of the swing rod, the other end of the first cable is connected with one end of the deformation pull rod, and the other end of the deformation pull rod is fixedly connected with the fixing pile.

Preferably, one end of the first cable opposite to the deformation pull rod is fixedly connected with a wheel seat of the movable pulley, and one end of the deformation pull rod opposite to the first cable is fixedly connected with one end of the second cable; the other end of the second inhaul cable is fixedly connected with the fixed pile by bypassing the wheel body of the movable pulley.

Preferably, the deformation pull rod is in a spiral shape.

Preferably, a fixing seat is further arranged on the ground outside the fixing pile, and a plurality of stay cables are arranged between the fixing pile and the fixing seat.

Preferably, the fixing seat and the fixing pile are anchored on the ground through a long anchor rod.

Preferably, the second inhaul cable and the deformation pull rod are both installed on the fixing pile through a fixing ring.

Preferably, the guide hole is internally provided with a rotating ring in a clamping manner, and the first inhaul cable is in contact with the hole wall of the guide hole through the rotating ring.

Preferably, the inner edge of the rotating ring is rounded.

Preferably, two groups of pulling buffer assemblies are correspondingly arranged on each swinging rod.

Preferably, the first energy absorption buffer mechanism comprises an inner twisting seat and an outer twisting seat which are sequentially arranged along the direction towards the end of the connecting section, and arc-shaped key teeth which are meshed with each other are arranged on the opposite surfaces of the inner twisting seat and the outer twisting seat; the centers of the outer twisting seat and the inner twisting seat are provided with center holes matched with the connecting sections; the outer twisting seat and the inner twisting seat are sleeved outside the connecting section through central holes, the inner twisting seat is fixedly connected with the guardrail main body, and the outer twisting seat and the connecting section form sliding fit along the length direction of the connecting section; the first energy absorption buffer mechanism also comprises an elastic pressing component which is arranged on the connecting section of one side of the outer twisting seat far away from the inner twisting seat and is used for pressing the outer twisting seat against the inner twisting seat;

the elastic pressing assembly comprises an inner pressing disc and an outer pressing disc which are sequentially sleeved on the connecting section along the direction towards the end head of the connecting section, and the inner pressing disc, the outer pressing disc and the connecting section form sliding fit along the length direction of the connecting section; the elastic pressing assembly further comprises a buffer spring, and the buffer spring is sleeved outside the connecting section between the inner pressure plate and the outer pressure plate; an end nut is arranged at the end part of the connecting section and is in threaded fit with the connecting section; the outer pressing disc is tightly propped against the connecting section through an end nut.

The beneficial effects of the invention are concentrated and expressed as follows: the traditional guardrail main body crumple energy absorption mode is changed, impact force is absorbed in a step mode in the rotating process of the swinging rod, and the buffer performance is better. Specifically, when the swinging rod collides with a vehicle, the first aspect of the invention buffers and releases the impact force through the rotation and deformation of the buffer cylinders, the second aspect of the invention buffers and releases the impact force through the second energy-absorbing buffer mechanism arranged at the swinging rod in the swinging process of the swinging rod, the third aspect of the invention buffers and releases the impact force through the mutual extrusion between the buffer cylinders after the buffer cylinders rotate along with the swinging rod, and the fourth aspect of the invention absorbs and releases the impact force through the blocking of the guardrail main body; the multiple modes are combined with each other, so that the absorption rate of the impact force is greatly improved, and the safety of vehicles and drivers and passengers is ensured to the maximum extent. When the second energy-absorbing buffer mechanism is used for buffering, the swinging rod rotates to drive the first inhaul cable to move, the first inhaul cable transmits the pulling force to the deformation pull rod, so that the deformation pull rod deforms, and the impact force is absorbed. In the working process of the second energy-absorbing buffer mechanism, part of the impact force is converted into the tensile force, the deformation of the deformation pull rod is realized through traction, meanwhile, part of the stress can be transmitted to the fixing pile through the second energy-absorbing buffer mechanism and then dispersed to the ground through the fixing pile, the phenomenon that the stress of a single node is too concentrated is avoided, and the overall energy-absorbing buffer effect is excellent.

Drawings

FIG. 1 is a schematic view of the installation position of the present invention;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a schematic structural view of a first energy absorbing and cushioning mechanism;

FIG. 4 is a top view of the internal twist mount;

FIG. 5 is a schematic structural view of a buffer cylinder;

FIG. 6 is a schematic view of the rotating ring;

FIG. 7 is an enlarged view of portion A of FIG. 2;

FIG. 8 is a top view of the structure shown in FIG. 2;

FIG. 9 is a schematic view of the structure shown in FIG. 8 in one use state;

fig. 10 is a schematic perspective view of the middle section of the balustrade body;

fig. 11 is a schematic structural view of the flexible support block.

Detailed Description

The energy-absorbing buffering expressway protective fence shown in figures 1-11 is mainly installed on a large curve, a slope, a road surface wet and slippery, dark ice and other road sections and used for enclosing a driving lane. Compared with the traditional lane guardrail box body, the invention also comprises a guardrail 1 which is arranged at the edge of the lane 0 and extends along the length direction of the lane 0, wherein the guardrail 1 comprises a plurality of columns 2 which are distributed at intervals and a guardrail body 3 which is arranged on the columns 2. The upright post 2 is used as an installation foundation, and the guardrail main body 3 is used as a main body structure of the enclosure.

Compared with the traditional simple guard rail, the simple guard rail has the great difference that a plurality of impacted rotating assemblies for directly bearing vehicle impact are uniformly distributed on one side of the guard rail main body 3 close to the lane 0 along the length direction of the guard rail main body 3. As the name implies, the said energized rotating assembly, i.e. the assembly capable of rotating when impacted by a vehicle, has a larger damping space when impacted. As shown in connection with fig. 8 and 9, i.e. the different behaviour of the impacted rotating components in normal conditions and in case of impact. The impacted rotary assembly includes a swing lever 11 shaped like a Chinese character 'ji' protruding toward the lane 0 side and a cushion cylinder 12 provided on the swing lever 11. The two ends of the swing rod 11 and the guardrail main body 3 form rotating fit with the rotating center line in the vertical direction. And a first energy absorption buffer mechanism and a second energy absorption buffer mechanism are respectively arranged at two ends and the middle part of the swinging rod 11. In the process of rotating the swing rod 11, the impact force is absorbed and buffered through the first energy-absorbing buffer mechanism and the second energy-absorbing buffer mechanism.

The first energy absorption buffer mechanism and the second energy absorption buffer mechanism can be independently matched with the impacted rotating assembly for use in different use occasions, and for a common road, the first energy absorption buffer mechanism or the second energy absorption buffer mechanism can be independently used. When the swing rod 11 collides with a vehicle, firstly, the impact force is buffered and released through the rotation and deformation of the buffer cylinder 12, secondly, the impact force is buffered and released through a first energy-absorbing buffer mechanism arranged at the connecting section 13 in the swinging process of the swing rod 11, thirdly, the impact force is buffered and released through a second energy-absorbing buffer mechanism arranged at the swing rod 11 in the swinging process of the swing rod 11, fourthly, the impact force is buffered and released through the mutual extrusion between the buffer cylinders 12 after the buffer cylinder 12 rotates along with the swing rod 11, and fifthly, the impact force is absorbed and released through the blocking of the guardrail main body 3; the multiple modes are combined with each other, so that the absorption rate of the impact force is greatly improved, and the safety of vehicles and drivers and passengers is ensured to the maximum extent.

Because the guardrail main body 3 is used as the last barrier of the enclosure, in order to ensure the self impact resistance of the guardrail main body 3, the invention has another great difference that the pertinence improvement is carried out on the guardrail main body 3, as shown in fig. 2, the cross section of the guardrail main body 3 is in a bow shape, as shown in fig. 10, a plurality of reinforcing plates 5 are distributed in the first groove 4 at the outer side of the middle part of the guardrail main body 3 at intervals along the length direction of the guardrail main body 3. In order to ensure the stability of the connection of the reinforcing plate 5, the reinforcing plate 5 is a V-shaped plate, and the opening side of the V-shaped plate faces the guardrail body 3 and is welded with the guardrail body 3. And a flexible supporting component is also arranged in the first groove 4 and comprises a supporting steel cable 6 and a plurality of flexible supporting blocks 7. Generally, the number of the supporting steel cables 6 is at least two, the flexible supporting block 7 is a rubber block, and it is also possible to use a plurality of supporting steel cables 6 or flexible supporting blocks 7 made of other materials. The reinforcing plate 5 is provided with a cable hole which transversely penetrates through the reinforcing plate 5, and the supporting steel cable 6 penetrates through the cable hole. The flexible supporting blocks 7 are matched with the first grooves 4 and are distributed in the first grooves 4 at intervals along the length direction of the first grooves 4. The flexible supporting block 7 is pressed between the supporting steel cable 6 and the bottom groove wall of the first groove 4.

The guardrail main body 3 is of a bow-shaped structure, the shock resistance of the guardrail main body is better, the shock resistance of the guardrail main body can be improved by the reinforcing plate 5, and the guardrail main body is not easy to break. Meanwhile, the outer side surface of the guardrail main body 3 is flexibly and intensively supported by the flexible supporting component through the flexible supporting component, and the supporting steel cable 6 and the flexible supporting block 7 have certain elasticity, so that the shearing resistance of the guardrail main body 3 can be effectively improved through the traction of the supporting steel cable 6. In addition, the rigidity of the guardrail main body is not excessively increased, so that the guardrail main body 3 can deform and collapse when being severely impacted, and the buffer capacity of the guardrail main body is not completely lost.

On the basis, in order to improve the combining capacity of the flexible supporting block 7 and the supporting steel cable 6, a cable groove 8 matched with the supporting steel cable 6 is arranged on the flexible supporting block 7, and the supporting steel cable 6 is positioned in the cable groove 8. In order to relieve the friction between the supporting steel cable 6 and a lock hole on the reinforcing plate and prevent the supporting steel cable 6 from being blocked, a rubber wear-resistant sleeve is sleeved on the surface of the supporting steel cable 6, which is in contact with the wall of the lock hole. In addition, in order to facilitate the installation of the flexible support block 7, the degree of coupling with the fence body 3 is also increased. As shown in fig. 11, a vertical positioning strip is welded on the first groove 4 at a position opposite to the flexible supporting block 7, a positioning groove 9 matched with the positioning strip is arranged at the bottom of the flexible supporting block 7, and the flexible supporting block 7 is installed on the positioning strip through the positioning groove 9. The structure of the positioning strip is relatively simple and not shown in the figures. Besides, the upper, middle and lower parts of the inner side of the guardrail main body 3 are provided with rubber buffer strips 10 extending along the length direction of the guardrail main body 3, and the rubber buffer strips 10 can further improve the buffer performance of the guardrail.

Of course, since the guardrail body 3 and the swinging rod 11 usually have a large volume, they are not convenient to be transported to the site after being assembled, but transported separately and assembled on site, and for this reason, the guardrail body 3 of the present invention is preferably of a sectional type structure for facilitating the installation of the impacted rotating assembly, and such a structure should be convenient for assembly. To this end, as shown in fig. 2 and 10, the guardrail body 3 of the present invention includes a middle section 37 having a cross-section in a shape of "a few" and upper and lower sections 38 and 39 having a cross-section in a shape of "S", and both ends of the swing lever 11 can be mounted on the upper and lower sections 38 and 39 of the guardrail body 3. Regarding the concrete connection mode between the three sections of the guardrail main body 3, the upper and lower edges of the middle section 37 are bent to form the clamping groove 40, the clamping groove 40 is matched with the lower half part of the upper section 38 and the upper half part of the lower section 39, and the lower half part of the upper section 38 and the upper half part of the lower section 39 are both arranged in the clamping groove 40 and connected with the clamping groove 40 through bolts. During assembly, the energized rotating assemblies may be installed on the upper and lower sections 38, 39 and then integrally installed on the middle section 37.

The guardrail main body 3 is divided into an upper section, a middle section and a lower section, the middle section 37 adopts a structure like a Chinese character 'ji', the upper section and the lower section adopt an 'S' -shaped structure, and the guardrail main body has stronger impact resistance. Meanwhile, each section can be independently processed and then assembled, so that the transportation and construction are more convenient and flexible. In addition, a part of the upper and lower sections can be clamped into the clamping groove 40 of the middle section 37 to be positioned and then fixed. The supporting force needed in the assembling process is smaller, and the use amount of various supporting tools is greatly reduced. As for the connection mode between the middle section 37 and the upright post 2, the invention is characterized in that the upper part and the lower part of the outer side surface of the middle section 37 of the guardrail main body 3 are both provided with the hoops 41 and are arranged on the upright post 2 through the hoops 41. Of course, other connection methods are also possible to achieve the same effect.

In the operation mode of the first energy absorption and buffering mechanism, the two ends of the swinging rod 11 form the connecting sections 13, the guardrail main body 3 is provided with connecting holes at positions opposite to the connecting sections 13, the connecting sections 13 are inserted into the connecting holes to form the rotating connection of the swinging rod 11, and besides, it is also possible to form the rotating connection in a mode that supporting sleeves are installed on the upper section 38 and the lower section 39, and the two ends of the swinging rod 11 are installed in the sleeves. When the mode of adopting the connecting hole forms the rotation cooperation, as shown in fig. 3, a protective sleeve 23 is arranged outside one section of the connecting section 13 opposite to the connecting hole, and the position of the connecting node is protected by the protective sleeve 23, so that the connecting section 13 is prevented from cracking or excessively deforming in the impact process, and the normal rotation of the connecting section is prevented from being influenced excessively.

As shown in fig. 3, the first energy absorption and buffering mechanism comprises an inner hinge seat 14 and an outer hinge seat 15 which are arranged in sequence along the direction towards the end of the connecting section 13, namely, along the direction from bottom to top in the figure, and the opposite surfaces of the inner hinge seat 14 and the outer hinge seat 15 are provided with mutually-meshed arc-shaped key teeth 16. The centers of the outer twisting seat 15 and the inner twisting seat 14 are both provided with center holes 17 matched with the connecting section 13, and the outer twisting seat 15 and the inner twisting seat 14 are both sleeved outside the connecting section 13 through the center holes 17. The inner twisting seat 14 of the first energy absorption buffer mechanism is fixedly connected with the guardrail main body 3, and is welded with the upper section 38 in the case of adopting the sectional type guardrail main body 3. The external twisting seat 15 and the connecting section 13 form sliding fit along the length direction of the connecting section 13. The first energy absorption buffer mechanism further comprises an elastic pressing component which is arranged on the connecting section 13 of the outer hinge seat 15 at the side far away from the inner hinge seat 14 and is used for pressing the outer hinge seat 15 against the inner hinge seat 14, and essentially, the main buffer performance of the first energy absorption buffer component is from the continuous compression and extension of the elastic pressing component. The elastic pressing component can be a spiral spring, an elastic sheet and the like. Of course, in the case of a coil spring, in order to ensure sufficient downward pressure, the spring is usually rigid and robust.

With continued reference to fig. 3, the elastic pressing assembly includes an inner pressing plate 18 and an outer pressing plate 19 sequentially sleeved on the connecting section 13 along a direction toward the end of the connecting section 13, and the inner pressing plate 18 and the outer pressing plate 19 are in sliding fit with the connecting section 13 along the length direction of the connecting section 13. That is to say, the inner pressure plate 18 and the outer pressure plate 19 are not rotated on the connecting section 13, and only constitute up-down movement, in order to achieve the above purpose, the cross section of the connecting section 13 is regular hexagon, the centers of the inner pressure plate 18 and the outer pressure plate 19 are provided with matched regular hexagon plate holes, and are sleeved outside the connecting section 13 through the plate holes, and it is also feasible to adopt other prism-shaped connecting sections 13 with regular pentagon-shaped cross sections, etc. Similarly, since the outer hinge base 15 is also slid on the connecting section 13 without rotating, as shown in fig. 4, the central hole 17 of the outer hinge base 15 is also in the shape of a regular hexagon. In the invention, because the inner pressure plate 18 needs to be repeatedly flicked, in order to keep the flicking stability, the centers of the opposite surfaces of the outer pressure plate 19 and the inner pressure plate 18 are respectively provided with a section of stabilizing sleeve 22 in an extending way, and the inner hole of the stabilizing sleeve 22 is also in a regular hexagon shape.

The elastic pressing assembly further comprises a buffer spring 20, and the buffer spring 20 is sleeved outside the connecting section 13 between the inner pressure plate 18 and the outer pressure plate 19. The end nut 21 is arranged at the end part of the connecting section 13, the end nut 21 is in threaded fit with the connecting section 13, the outer pressing disc 19 is tightly abutted to the connecting section 13 through the end nut 21, and the oscillating rod 11 can be rapidly assembled in the mode, so that the oscillating rod is more convenient to transport and install.

When the buffering is carried out through the first energy-absorbing buffering mechanism, the swinging rod 11 rotates to drive the connecting section 13 to rotate, and the connecting section 13 drives the external twisting seat 15 arranged on the connecting section 13 to rotate; since the outer hinge base 15 and the inner hinge base 14 are engaged with each other, the rotating force drives the outer hinge base 15 to move upward to be disengaged, and further drives the inner pressure plate 18 to press the buffer spring 20. In the process of rotating the swinging rod 11, the impact force can be quickly converted into repeated compression on the buffer spring 20, and the impact force is further effectively absorbed and buffered.

In order to ensure sufficient toughness and elasticity, the buffer cylinder 12 of the present invention is used as a buffer element directly contacting with the vehicle, and more preferably, as shown in fig. 5, each of the swing rods 11 is provided with a plurality of buffer cylinders 12, and the buffer cylinders 12 are sleeved outside the swing rods 11 and form a rotational fit with the swing rods 11. The buffer cylinder 12 comprises a central sleeve 24, and a plurality of staggered rubber cylinder rings 25 and elastic nets 26 which are arranged outside the central sleeve 24.

Regarding the operation of the second energy absorption and buffering mechanism, as shown in fig. 2, the second energy absorption and buffering mechanism of the present invention includes a spud pile 27 fixedly disposed at the outer side of the guardrail body 3 and a pulling and buffering assembly for connecting the spud pile 27 and the swing lever 11. The spud pile 27 is used as a stressed foundation and needs to bear huge pulling force, in order to ensure the stability of the spud pile 27, a fixed seat 32 is further arranged on the ground outside the spud pile 27, and a plurality of stay cables 33 are arranged between the spud pile 27 and the fixed seat 32. By adopting the mode of the plurality of stay cables 33, the stress can be shared by the plurality of stay cables 33, and each part of the fixing pile 27 is ensured to have better supporting performance. The fixing base 32 and the fixing pile 27 are anchored on the ground through a long anchor rod 34. Generally, each swing rod 11 is correspondingly provided with two groups of traction buffer assemblies, and the number of the traction buffer assemblies can be increased or decreased according to actual conditions in consideration of special requirements.

The traction buffering assembly comprises a first cable 28 and a deformation pull rod 29, one end of the first cable 28 penetrates through a guide hole formed in the guardrail body 3 to be connected with the middle of the swing rod 11, the other end of the first cable 28 is connected with one end of the deformation pull rod 29, and the other end of the deformation pull rod 29 is fixedly connected with the fixing pile 27. The deformed pull rod 29, that is, a rod member capable of changing its shape when being pulled by the first cable 28, may take a spiral shape, an S-shape, or the like, wherein the spiral shape is more preferable to provide a better buffering force. Generally, the deformation tie 29 does not recommend a material with high resilience to prevent it from rebounding with the oscillating rod 11.

When the second energy absorption buffer mechanism buffers, the swinging rod 11 rotates to drive the first cable 28 to move, the first cable 28 transmits the pulling force to the deformation pull rod 29, and the deformation pull rod 29 deforms, so that the impact force is absorbed. In the working process of the second energy-absorbing buffer mechanism, part of the impact force is converted into the tensile force, the deformation of the deformation pull rod 29 is realized through traction, meanwhile, part of the stress can be transmitted to the fixing pile 27 through the second energy-absorbing buffer mechanism and then dispersed to the ground through the fixing pile 27, the phenomenon that the stress of a single node is too concentrated is avoided, and the overall energy-absorbing buffer effect is excellent.

In addition, in order to better disperse the pulling force transmitted from the first cable 28 to the fixing pile 27 and to improve the supporting degree, i.e., the deformation resistance, of the deformation link 29, it is also possible to employ a mode that one end of the first cable 28 opposite to the deformation link 29 is fixedly connected to the wheel seat of the movable pulley 30, and one end of the deformation link 29 opposite to the first cable 28 is fixedly connected to one end of the second cable 31. The other end of the second cable 31 is fixedly connected with the fixing pile 27 by passing around the wheel body of the movable pulley 30. By this construction, the invention is in fact made to form a movable pulley structure, which is able to provide a greater resistance to deformation damping when using the same size of the deformation tie 29. Generally, the second cable 31 and the deformation pull rod 29 are both mounted on the fixing peg 27 through a fixing ring 35. In addition, since the first cable 28 is in the process of being driven by the swing rod 11, it will rub against the guardrail main body 3, such as the guide hole on the middle section 37 in fig. 2, in order to reduce the risk of breaking the first cable 28, the guide hole is clamped with a rotating ring 36 as shown in fig. 6, the first cable 28 contacts with the hole wall of the guide hole through the rotating ring 36, and the inner edge of the rotating ring 36 is rounded.