Flexible buffering and energy-absorbing guardrail structure

Abstract

The utility model discloses a flexible buffering and energy-absorbing guardrail structure, which relates to the field of buffering guardrails, and adopts the technical scheme that the flexible buffering and energy-absorbing guardrail structure comprises a guardrail support; the hydraulic buffer is arranged in the guardrail support; the guardrail end head is connected with the guardrail support in a sliding manner and is connected with the hydraulic buffer; the contraction structure comprises shear fork pieces which are hinged to one another, the multiple shear fork pieces are sequentially connected with one another in the moving direction of the ends of the guardrail, and hinge joints are arranged at the connecting positions of the shear fork pieces; according to the flexible buffering energy-absorbing guardrail, the overall energy-absorbing effect of the guardrail is improved in a flexible buffering energy-absorbing mode, and secondary damage caused by the guardrail is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of buffer guardrails, more particularly to a flexible buffer energy-absorbing guardrail structure. BACKGROUND

[0002] Traffic guardrails are safety facilities used to separate traffic lanes, and are more commonly used to separate motor vehicle lanes from non-motor vehicle lanes and to provide protection in the event of traffic hazards. Existing traffic guardrails include fixed types and buffer deformation types. The fixed types are used to be anchored to the ground to form rigid protection, but when such guardrails are impacted, they will deform and absorb energy. This deformation and energy absorption is based on the destruction of the guardrail structure, and the energy absorption range is limited. After deformation and energy absorption, the corresponding guardrail structure needs to be repaired or scrapped. At the same time, since the force acting on the guardrail structure during deformation is mutual, it may cause secondary injury to the person hitting the guardrail during energy absorption, especially when hitting along the length of the guardrail, even the sharp end of the guardrail may cause puncture injury to the person hitting it. Compared with the fixed type of guardrail, the buffer deformation type of guardrail is gradually used in many places, and this buffer deformation type of guardrail is relatively safer and more reliable than the fixed type of guardrail. The buffer deformation type of guardrail deforms and absorbs energy when impacted to form protection and reduce injury caused by impact.

[0003] The present application is further improved based on the applicant's prior application to form a multi-stage buffer energy absorption. The prior application, disclosed in the invention patent with publication number CN118422619A, discloses an anti-collision traffic guardrail end, which includes a fixed part for fixed connection with the road and the guardrail, a moving part, and an energy-absorbing buffer structure. The fixed part and the moving part are connected and support the two ends of the energy-absorbing buffer structure, respectively. The energy-absorbing buffer structure includes at least one buffer device with a telescopic structure. When a vehicle hits the moving part, the buffer device contracts and provides a buffer force for the vehicle.

[0004] However, the overall structure of the prior application will move under the action of the hydraulic buffer when impacted at the end. At this time, the moving part will form a buffer and energy absorption of the impact force under the action of the hydraulic buffer. Due to the functional characteristics of the hydraulic buffer, the energy absorption when impacted and contracted does not belong to the flexible energy absorption mode. Therefore, when the hydraulic buffer absorbs energy, if the instantaneous impact speed and impact force are too large, the moving part will provide a larger counteracting force to the impact object. When the impact speed and impact force reach a certain level, the counteracting force provided by the moving part to the impact object may also cause secondary injury.

[0005] The flexible buffering energy-absorbing guardrail structure is particularly important, and through flexible buffering when being impacted, the reaction force during impact can be reduced to the maximum extent, and secondary injury of a person after impact can be reduced. Content of the utility model

[0006] In view of the defects in the prior art, the utility model discloses a flexible buffering energy-absorbing guardrail structure, which has the energy-absorbing effect of the whole guardrail improved through the flexible buffering energy-absorbing mode, and secondary injury caused by the guardrail is reduced.

[0007] To achieve the above object, the utility model provides the following technical scheme:

[0008] A flexible buffering energy-absorbing guardrail structure, comprising:

[0009] A guardrail support;

[0010] A hydraulic buffer arranged in the guardrail support;

[0011] A guardrail end head connected with the guardrail support in sliding mode and connected with the hydraulic buffer;

[0012] A contraction structure comprising scissor pieces hingedly connected with each other, wherein a plurality of the scissor pieces are connected with each other in sequence along the moving direction of the guardrail end head, and the connection position of the scissor pieces is provided with a hinged joint;

[0013] An elastic damper arranged at the hinged joint;

[0014] When the guardrail end head is impacted, it moves along the axis direction of the guardrail support to absorb energy and drives the contraction structure to compress, so that the elastic damper deforms and provides flexible buffering, and the hydraulic buffer provides secondary buffering.

[0015] As a further improvement of the utility model, the guardrail end head is provided with a partition piece, and a sliding groove is formed on the partition piece, and the sliding groove is connected with the hinged joint in sliding mode.

[0016] As a further improvement of the utility model, the partition piece comprises a ring sleeve and a connecting plate, the ring sleeve is coaxially arranged outside the supporting rod, the connecting plate is connected with the ring sleeve and is arranged perpendicularly to the ring sleeve, and the sliding groove is arranged on the connecting plate.

[0017] As a further improvement of the utility model, further comprising:

[0018] A ground rail, which is divided into a moving section and a buffering section;

[0019] The guardrail end head comprises a base and a supporting rod, the base is arranged in the moving section and the buffer section respectively, the supporting rod is used for connecting the bases and is connected with the guardrail support through one end of the supporting rod.

[0020] As a further improvement of the utility model, a limiting device is arranged between the guardrail end head and the ground rail, and the limiting device is used for limiting the movement of the guardrail end head along the ground rail.

[0021] As a further improvement of the utility model, a guide plate is arranged on the base, and the guide plate is used for connecting the scissors and the base.

[0022] As a further improvement of the utility model, the utility model further comprises:

[0023] An axial damper is arranged along the axis of the supporting rod and is used for providing a flexible buffer energy-absorbing damping force.

[0024] As a further improvement of the utility model, the axial damper is arranged inside and / or outside the supporting rod.

[0025] As a further improvement of the utility model, the supporting rod is covered with a protective sleeve.

[0026] As a further improvement of the utility model, the guardrail support is connected with a buffer seat on the side away from the guardrail end head, and the buffer seat is formed with a buffer cavity coaxially arranged with the inner cavity.

[0027] The utility model has the advantages of:

[0028] By arranging the guardrail end head in slidable connection with the guardrail support and the elastic damper arranged in the guardrail end head, the elastic damper is compressed under the action of the movement of the guardrail end head when the guardrail end head is impacted, so that the elastic damper provides a flexible buffer energy-absorbing function, and the remaining impact energy is quickly absorbed by the hydraulic buffer after the impact is flexibly buffered and absorbed by the elastic damper, so that the impact damage is reduced under the action of the multi-stage buffer energy-absorbing function. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 A perspective view of the flexible buffer energy-absorbing guardrail structure is shown.

[0030] Figure 2 A partial enlarged view of A in Figure 1

[0031] Figure 3 A structure diagram of the hydraulic buffer is shown.

[0032] Figure 4 ​Fig. 1 is a structural schematic diagram of a partitioning member;

[0033] Figure 5 Fig. 2 is a structural schematic diagram of a limiter;

[0034] Figure 6 Fig. 3 is a structural schematic diagram of a contraction structure and a partitioning member;

[0035] Figure 7 Fig. 4 is a structural schematic diagram of a contraction structure and an elastic damper;

[0036] Figure 8 Fig. 5 is a structural schematic diagram of a limiter in Embodiment 2;

[0037] Figure 9 Fig. 6 is a structural schematic diagram of an axial damper in Embodiment 3.

[0038] Fig. 1 is a structural schematic diagram of a partitioning member; DETAILED DESCRIPTION

[0039] In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. The components of the embodiments of the present disclosure described and shown herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present disclosure is not intended to limit the scope of the claimed present disclosure, but only represents selected embodiments of the present disclosure. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present disclosure.

[0040] Embodiment 1

[0041] Reference Figures 1 to 4The utility model provides a flexible buffering energy absorbing guardrail structure's specific embodiment, including guardrail support 1, guardrail end 2 and buffer seat 3, guardrail end 2 and buffer seat 3 are arranged respectively at the both sides of guardrail support 1, wherein the bottom of guardrail end 2 still is provided with ground rail 4 fixed on the ground through ground anchor, ground rail 4 includes moving section 41 and buffer section 42, one end of buffer section 42 is connected with guardrail support 1, guardrail end 2 includes base 21 and support rod 22, base 21 is arranged respectively in moving section 41 and buffer section 42, support rod 22 is used to connect base 21, and when support rod 22 is connected on the base 21 of buffer section 42, the end of support rod 22 passes through base 21 and is arranged in guardrail support 1, the inner cavity for the arrangement of support rod 22 is formed in guardrail support 1, the buffer cavity coaxially arranged with the inner cavity is formed in buffer seat 3, so that when guardrail end 2 is impacted, guardrail end 2 moves along ground rail 4, wherein support rod 22 moves along the inner cavity and buffer cavity, so that the whole guardrail end 2 is impacted and moves.

[0042] Reference Figure 1 and Figure 2 As shown in the figure, still include hydraulic buffer 5 and shrink structure 6, hydraulic buffer 5 is arranged in guardrail support 1, and is connected with guardrail end 2, shrink structure 6 includes mutually articulated scissor piece 61, scissor piece 61 is sequentially connected with multiple mutually along the moving direction of guardrail end 2, the junction of scissor piece 61 is provided with articulated node 62, scissor piece 61 includes mutually articulated and presents x type structure's fork rod, two mutually articulated fork rod also sets up articulated node 62, the both ends of whole shrink structure 6 are connected with the base 21 on moving section 41 and buffer section 42 respectively, base 21 is provided with guide plate 23, guide plate 23 is used to connect scissor piece 61, guardrail end 2 is provided with partition piece 9, partition piece 9 includes ring sleeve 91 and connecting plate 92, ring sleeve 91 is coaxially arranged outside support rod 22, connecting plate 92 is connected with ring sleeve 91 and is arranged perpendicularly with ring sleeve 91, connecting plate 92 is provided with sliding slot, and sliding slot is used for the sliding connection of articulated node 62.

[0043] Reference Figure 1 , Figure 6 and Figure 7As shown, the elastic damper 7 is arranged at the articulated joint 62, and the elastic damper 7 includes but is not limited to a torsional spring, and in this embodiment, the torsional spring is selected. The overall guardrail end 2 has the effect of flexible buffering and energy absorption through the elastic damper 7. Specifically, when the overall guardrail is installed and used, the direction along the length of the passage is arranged to be very long, and the flexible buffering and energy absorption guardrail structure of the present application is arranged at both ends of the overall guardrail, and the conventional guardrail is connected to the middle part of the overall guardrail. When the guardrail end 2 at the end is subjected to an axial impact, the impact force acts on the base 21 of the moving section 41 of the ground rail 4, at this time, the base 21 moves along the ground rail 4 under the action of the impact force, and the contraction structure 6 is compressed, and the elastic damper 7 is compressed when the contraction structure 6 is compressed, so that the flexible buffering and energy absorption is formed under the action of the elastic damper 7. And, because the force is mutual, when the flexible buffering and energy absorption of the guardrail end 2 is formed, the hydraulic buffer 5 synchronously buffers and absorbs energy, and forms multi-stage buffering and energy absorption, so as to realize the buffering and energy absorption of the impact force. When the impact force of the guardrail end 2 is eliminated, the elastic damper 7 releases the elastic force to drive the support to gradually reset along the ground rail 4. Thus, the flexible buffering and energy absorption can be formed when the impact is received, and the secondary injury of the personnel is reduced.

[0044] Reference Figure 1 and Figure 5 As shown, the guardrail end 2 and the ground rail 4 are further provided with a limit stop 43, and the limit stop 43 is used to limit the movement of the guardrail end 2 along the ground rail 4, so that the guardrail end 2 is not easy to derail when it is subjected to impact, so as to fully perform the flexible buffering and energy absorption.

[0045] Embodiment 2

[0046] Reference Figure 1 , Figure 3 and Figure 8 As shown, the guardrail end 2 and the ground rail 4 are further provided with a limit stop 43, and the limit stop 43 is used to limit the movement of the guardrail end 2 along the ground rail 4, so that the guardrail end 2 is not easy to derail when it is subjected to impact, so as to fully perform the flexible buffering and energy absorption.

[0047] Embodiment 3

[0048] Reference Figure 1 and Figure 9The difference between the specific embodiment of the guardrail structure with multi-stage buffering of the present embodiment and embodiment 2 is that the axial damper 8 is further included, the axial damper 8 is arranged along the axis of the support rod 22 and is used to provide a flexible buffering and energy-absorbing damping force, the axial damper 8 includes being arranged in the support rod 22 and / or outside the support rod 22, so that when the guardrail end 2 is impacted and absorbs energy, the axial damper 8 further provides flexible buffering, improves the overall impact force and impact speed that can be borne, and under the action of flexible buffering, reduces the secondary injury to the person when impacting, and the support rod 22 is further protected by the protective sleeve 24 for protecting the support rod 22 or the axial damper 8.

[0049] Those skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the system and device described above can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here. In several embodiments provided in the present disclosure, it should be understood that the disclosed device and method can be implemented in other ways. The device embodiments described above are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, and for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed each other can be indirect coupling or communication connection through some communication interface, device or unit, which can be electrical, mechanical or other forms.

[0050] Finally, it should be noted that: the above-described embodiments are only specific embodiments of the present disclosure, used to illustrate the technical solutions of the present disclosure, rather than limit them, the protection scope of the present disclosure is not limited thereto, although the present disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art within the technical range disclosed by the present disclosure can still modify or easily think of changes to the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to some technical features thereof; and these modifications, changes or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure, and all should be covered in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A flexible, cushioning, energy-absorbing barrier structure, characterized in that The utility model relates to a guardrail end head and ground rail buffer system, including: Guardrail support (1); Hydraulic buffer (5) is arranged in guardrail support (1); Guardrail end head (2) is connected with guardrail support (1) slip and is connected with hydraulic buffer (5); Contraction structure (6) includes articulated scissors (61) each other, articulated scissors (61) are connected with multiple each other along guardrail end head (2) movement direction in proper order, and articulated node (62) is arranged at the junction of articulated scissors (61); Elastic damper (7) is arranged at articulated node (62); When the guardrail end head (2) is impacted, energy-absorbing movement is along the axis direction of the guardrail support (1), and the contraction structure (6) is compressed, so that the elastic damper (7) is deformed and provides flexible buffering, and the hydraulic buffer (5) provides secondary buffering.

2. The flexible impact-absorbing barrier structure of claim 1, wherein: The guardrail end head (2) is provided with a partition piece (9), and a sliding groove is formed on the partition piece (9) for sliding connection of the articulated node (62).

3. The flexible impact-absorbing barrier structure of claim 2, wherein: The partition piece (9) includes a ring sleeve (91) and a connecting plate (92), the ring sleeve (91) is coaxially sleeved outside the support rod (22), the connecting plate (92) is connected with the ring sleeve (91) and is arranged perpendicularly to the ring sleeve (91), and the sliding groove is formed on the connecting plate (92).

4. The flexible impact-absorbing barrier structure of claim 1, wherein, Further comprising: Ground rail (4) is divided into moving section (41) and buffer section (42); The guardrail end head (2) includes a base (21) and a support rod (22), the base (21) is arranged in the moving section (41) and the buffer section (42) respectively, the support rod (22) is used for connecting the base (21) and is arranged in the base (21) and connected with the guardrail support (1), and an inner cavity is formed in the guardrail support (1) for the support rod (22) to pass through.

5. The flexible, cushioning, energy-absorbing barrier structure of claim 4, wherein: A limit stop (43) is further arranged between the guardrail end head (2) and the ground rail (4), and the limit stop (43) is used for limiting the movement of the guardrail end head (2) along the ground rail (4).

6. The flexible, cushioning, energy-absorbing barrier structure of claim 5, wherein: A guide plate (23) is arranged on the base (21), and the guide plate (23) is used for connecting the scissors (61) and the base (21).

7. The flexible impact-absorbing barrier structure of claim 4, wherein, Further comprising: An axial damper (8) is arranged along the axis of the support rod (22) and is used for providing a flexible buffering damping force.

8. A flexible impact-absorbing barrier structure according to claim 7, wherein: The axial damper (8) is arranged inside and / or outside the support rod (22).

9. The flexible, cushioning, energy-absorbing barrier structure of claim 4, wherein: The support rod (22) is covered with a protective sleeve (24).

10. A flexible impact-absorbing barrier structure according to any one of claims 1 to 9, characterised in that: The guardrail support (1) is connected with a buffer seat (3) on the side away from the guardrail end head (2), and a buffer cavity coaxially arranged with the inner cavity is formed in the buffer seat (3).

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