A storable guide marker lamp holder for a crash cushion vehicle

Abstract

The utility model discloses a kind of storable guide marker light frame for anti-collision buffer car, it is related to road construction safety equipment field, to solve the problem of insufficient dynamic adaptability of traditional guide marker light frame. Including guide marker light frame base, guide marker light frame, hydraulic system and expansion bracket. Guide marker light frame base is installed in the tail of the container of anti-collision buffer car, guide marker light frame is hinged with guide marker light frame base, hydraulic system is arranged between guide marker light frame base and guide marker light frame, and expansion bracket is fixedly connected at the top of guide marker light frame. Storable guide marker light frame can be collected into container in non-working state, in working state, combined with early warning system installed on the top of expansion bracket, unobstructed high far field of view and larger monitoring range can be obtained.

Description

Technical Field

[0001] This utility model relates to the field of road construction safety equipment, and in particular to a retractable guide sign light holder for anti-collision buffer vehicles. Background Technology

[0002] Collision buffer vehicles are core safety equipment for highway maintenance operations. The dynamic adaptability and safety compatibility of their rear guide light brackets directly affect the safety of the work environment and the stability of the vehicle.

[0003] Existing directional sign light holders are mostly fixed structures installed at the rear of the cargo box. When not in operation, these fixed light holders extend more than 2 meters above the cargo box sideboards, significantly increasing wind resistance and causing vehicle swaying and vibration. This reduces driving stability and accelerates wear and tear on the light holder structure. When in operation, the light holder height is limited by the GB1589 standard, "Limits of Overall Dimensions, Axle Load and Mass of Motor Vehicles, Trailers and Vehicle Combinations," which stipulates a vehicle height of ≤4 meters. In complex road conditions such as curves, slopes, and heavy traffic, the visibility distance of directional signs to following vehicles is insufficient, resulting in delayed warning responses, increased rear-end collision risks, and an inability to meet the safety requirements of efficient highway maintenance. Utility Model Content

[0004] The purpose of this utility model is to provide a retractable guide sign light holder for vehicles with anti-collision buffer, which aims to solve the problem of insufficient dynamic adaptability of traditional guide sign light holders.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: This utility model provides a retractable guide sign light holder for a crash-resistant buffer vehicle, including a guide sign light holder base, a guide sign light holder, a hydraulic system, and an extension bracket. The guide sign light holder base is installed at the rear of the cargo box of the crash-resistant buffer vehicle, and the guide sign light holder is hinged to the guide sign light holder base. The hydraulic system is arranged between the guide sign light holder base and the guide sign light holder, and the extension bracket is fixedly connected to the top of the guide sign light holder. The guide sign light holder includes a light holder panel, LED beads, arrow lights, a first switch, and a second switch. The LED beads and arrow lights are both set on the light holder panel. The first switch is embedded in different areas of the light holder panel and is used to detect whether there is an obstacle on the surface of the light holder panel. When the first switch detects an obstacle, the hydraulic system stops working. The second switch is located at the hinge position between the light holder panel and the guide sign light holder base and is used to detect whether the guide sign light holder is extended to a vertical position. The hydraulic system includes a hydraulic cylinder, a plate-type balance valve, a limiter, and a pin lock. The cylinder body of the hydraulic cylinder is hinged to the guide sign light holder base, and the piston rod end of the hydraulic cylinder is hinged to the guide sign light holder. A plate-type balance valve is integrated into the hydraulic cylinder's oil circuit. This valve prevents the guide sign light frame from falling under its own weight. A limit switch is fixed to the guide sign light frame base. When the guide sign light frame is retracted to a preset position, the limit switch is triggered and cuts off the power supply to the hydraulic system. A latch lock is electrically connected to a second switch. When the second switch detects that the guide sign light frame has extended to a vertical position, the latch lock automatically inserts into the locking hole of the guide sign light frame base to lock the guide sign light frame.

[0006] The guide sign light holder base includes a main support and a secondary support. Both the main support and the secondary support are connected to the bottom plate at the rear of the cargo box. At least two secondary supports are evenly distributed between two main supports.

[0007] The guide sign light frame also includes a buffer block, which is fixed to the side wall of the main support of the light frame base facing the light frame panel. When the guide sign light frame is unfolded to the vertical position, the back of the light frame panel contacts the buffer block.

[0008] There are two hydraulic cylinders, each corresponding to one of the two main supports of the lamp holder base. The cylinder body of each hydraulic cylinder is hinged to the inner wall of the corresponding main support of the lamp holder base via a hinge shaft, and the piston rod end of each hydraulic cylinder is hinged to the back of the lamp holder panel via a hinge shaft.

[0009] The plate-type balance valve includes an oil inlet and an oil outlet. The oil inlet of the plate-type balance valve is connected to the oil pump unit of the hydraulic system, and the oil outlet of the plate-type balance valve is connected to the rodless chamber of the hydraulic cylinder.

[0010] The bolt lock can be either hydraulically driven or electromagnetically driven. When the bolt lock is hydraulically driven, its oil circuit is connected in parallel with the hydraulic cylinder's oil circuit. When the bolt lock is electromagnetically driven, its circuit is connected in series with the second switch's circuit.

[0011] The retractable guide sign light bracket for crash-resistant vehicles also includes a warning system. The warning system is detachably connected to the standard threaded interface on the top of the extension bracket via bolts, and the warning system is retracted into the cargo box along with the guide sign light bracket.

[0012] When the guide sign light holder is in the retracted state, the top of the light holder panel is lower than the top of the cargo box side panel, and the maximum height of the rear of the crash buffer vehicle is lower than the top height of the crash buffer vehicle cab.

[0013] There are at least three first switches, one of which is embedded in the upper area of ​​the lamp holder panel, and the other two are embedded in the left and right edge areas of the lamp holder panel, respectively.

[0014] The limit switch is a mechanical contact type, fixed to the top of the main support of the light fixture base. When the guide sign light fixture is retracted to the horizontal position, the back of the light fixture panel contacts the limit switch, triggering the limit switch to cut off the power supply to the hydraulic system's oil pump unit, thereby stopping the hydraulic cylinder's movement.

[0015] Compared to existing technologies, the beneficial effects of this application are as follows: 1. This utility model provides a retractable guide sign light holder for anti-collision buffer vehicles. When not in use, the light holder can be retracted into the cargo box, with the top of the light holder panel lower than the cargo box sideboard and the highest point of the rear of the vehicle lower than the top of the cab. This solves the wind resistance problem caused by traditional fixed light holders extending beyond the cargo box sideboard, reducing swaying and vibration during vehicle movement. This improves driving stability when not in use and avoids structural damage caused by long-term vibration, extending the equipment's service life. In the working state, combined with the warning system installed on the top of the extended bracket, it provides an unobstructed high-angle field of vision and a wider monitoring range, significantly extending the visibility distance of the guide sign to following vehicles. It can provide early warning to following vehicles, effectively solving the problems of insufficient visibility and delayed warning of traditional light holders, reducing the risk of rear-end collisions.

[0016] 2. This application utilizes a multi-component collaborative system to construct a comprehensive safety protection system. The integrated plate-type balance valve in the hydraulic system prevents the lamp holder from accidentally falling due to gravity, avoiding structural collision damage. A mechanical contact-type limiter, fixed to the top of the main support of the lamp holder base, triggers and cuts off the oil pump power supply when the lamp holder is retracted to a horizontal position, precisely controlling the retraction position and preventing over-operation. Buffer blocks on the main support of the lamp holder base mitigate the impact of collisions when the lamp holder is extended to a vertical position, further protecting structural integrity. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This application provides a schematic diagram of the structure of a collapsible guide sign light holder for vehicles with anti-collision buffer. Figure 2 A schematic diagram of another retractable guide sign light holder for vehicles with anti-collision buffer provided in this application embodiment; Figure 3 A front view of a retractable guide sign light holder for vehicles with anti-collision buffer provided in an embodiment of this application; Figure 4 An installation diagram of a collapsible guide sign light holder for vehicles with anti-collision buffer provided in this application embodiment; Figure 5 This is a schematic diagram of the stowed state of a crash-resistant, retractable guide sign light holder for vehicles, provided as an embodiment of this application.

[0019] Wherein: 1 is the base of the guide sign light frame; 101 is the main support of the light frame base; 102 is the secondary support of the light frame base; 2 is the guide sign light frame; 201 is the light frame panel; 202 is the LED bead; 203 is the arrow light; 204 is the first switch; 205 is the second switch; 206 is the buffer block; 3 is the hydraulic system; 301 is the hydraulic cylinder; 302 is the plate-type balance valve; 303 is the limit switch; 304 is the bolt lock; 4 is the extension bracket; 5 is the early warning system; 6 is the vehicle cargo box; 7 is the secondary anti-collision buffer pad. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this application. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or relative positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Unless otherwise specified, the above-mentioned orientational descriptions can be flexibly set in actual application, provided that the relative positional relationship shown in the accompanying drawings is satisfied.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "communication" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] In embodiments of this invention, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, article, or apparatus that includes that element.

[0025] In this embodiment of the invention, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in this embodiment of the invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0026] This application provides a retractable guide sign light holder for vehicles with anti-collision buffers, exemplarily referring to... Figures 1-5It includes a guide sign light holder base 1, a guide sign light holder 2, a hydraulic system 3, and an extension bracket 4. The guide sign light holder base 1 is installed at the rear of the cargo box of the crash buffer vehicle by bolts or welding. The guide sign light holder 2 is hinged to the guide sign light holder base 1. The hydraulic system 3 is arranged between the guide sign light holder base 1 and the guide sign light holder 2. The extension bracket 4 is fixedly connected to the top of the guide sign light holder 2.

[0027] For example, the guide sign light frame 2 includes a light frame panel 201, LED beads 202, arrow lights 203, a first switch 204, and a second switch 205. The LED beads 202 and arrow lights 203 are both disposed on the light frame panel 201. The first switch 204 is embedded in different areas of the light frame panel 201 and is used to detect whether there is an obstacle on the surface of the light frame panel 201. When the first switch 204 detects an obstacle, the hydraulic system 3 stops working. The second switch 205 is disposed at the hinge position between the light frame panel 201 and the guide sign light frame base 1. The second switch 205 is used to detect whether the guide sign light frame 2 has been extended to a vertical position.

[0028] As one possible implementation, at least three first switches 204 are provided, one of which is embedded in the upper region of the lamp holder panel 201, and the other two are embedded in the left and right edge regions of the lamp holder panel 201, respectively.

[0029] The hydraulic system 3 includes a hydraulic cylinder 301, a plate-type balance valve 302, a limiter 303, and a pin lock 304. The cylinder body of the hydraulic cylinder 301 is hinged to the guide sign light holder base 1, and the piston rod end of the hydraulic cylinder 301 is hinged to the guide sign light holder 2. The plate-type balance valve 302 is integrated into the oil circuit of the hydraulic cylinder 301 and is used to prevent the guide sign light holder 2 from falling due to gravity. The limiter 303 is fixed to the guide sign light holder base 1. When the guide sign light holder 2 is retracted to a preset position, the limiter 303 is triggered and cuts off the power supply to the hydraulic system 3. The pin lock 304 is electrically connected to a second switch 205. When the second switch 205 detects that the guide sign light holder 2 has been extended to a vertical position, the pin lock 304 automatically inserts into the locking hole of the guide sign light holder base 1 to lock the guide sign light holder 2.

[0030] The lamp holder panel 201 serves as the basic load-bearing structure, and its back is hinged to the piston rod end of the hydraulic cylinder 301 of the hydraulic system 3 to enable unfolding and retraction. The lamp beads 202 and the arrow lights 203 are used to provide clear directional signals in the working state to ensure that vehicles behind can identify the maintenance work area.

[0031] For example, the plate balance valve 302 includes an oil inlet and an oil outlet. The oil inlet of the plate balance valve 302 is connected to the oil pump unit of the hydraulic system 3, and the oil outlet of the plate balance valve 302 is connected to the rodless chamber of the hydraulic cylinder 301. The guide sign light frame is prevented from falling by controlling the oil circuit pressure.

[0032] For example, when the crash buffer vehicle needs to enter the working state, the oil pump unit of the hydraulic system 3 is activated. The oil pump unit outputs high-pressure oil, which first flows to the inlet of the plate balance valve 302. Under the action of high-pressure oil, the valve core inside the plate balance valve 302 overcomes the spring force and moves, making the path from the inlet to the outlet open. The oil is then precisely injected into the rodless chamber of the hydraulic cylinder 301 through the outlet of the plate balance valve 302. The oil pressure in the rodless chamber of the hydraulic cylinder 301 increases, pushing the piston rod to extend along the cylinder body. The piston rod drives the guide sign light frame 2 to rotate upward and unfold around the hinge point with the guide sign light frame base 1.

[0033] When the guide sign light holder 2 is extended to the vertical working position, the second switch 205, located at the hinge between the light holder panel 201 and the guide sign light holder base 1, detects this. The control unit inside the hydraulic system 3 receives a control signal from the second switch 205, cutting off the power supply to the oil pump unit, and the oil pump stops outputting oil. After the oil pump stops supplying oil, the plate balance valve 302 resets under the action of spring force due to the disappearance of oil circuit pressure, completely locking the oil circuit of the rodless chamber of the hydraulic cylinder 301. Even if there is a slight leakage in the oil circuit, the pressure compensation function of the balance valve can maintain the pressure in the rodless chamber, ensuring that the guide sign light holder 2 always maintains a vertical working posture and has no risk of falling. At the same time, the second switch 205 can simultaneously trigger the pin lock 304. The pin of the pin lock 304 automatically inserts into the locking hole of the guide sign light holder base 1, mechanically fixing the guide sign light holder 2. Combined with the hydraulic locking of the plate balance valve 302, a double guarantee is formed to prevent the guide sign light holder 2 from tipping over during operation.

[0034] For example, the guide sign light holder base 1 includes a main support 101 and a secondary support 102, both of which are connected to the bottom plate at the rear of the cargo box. For example, the main support 101 and the secondary support 102 are connected to the bottom plate at the rear of the cargo box by bolts. At least two secondary supports 102 are evenly distributed between two main supports 101, and the main supports 101 and secondary supports 102 together bear and support the guide sign light holder 2.

[0035] For example, the limiter 303 is a mechanical contact limiter, which is fixed to the top of the main support 101 of the lamp holder base. When the guide sign lamp holder 2 is retracted to the horizontal position, the back of the lamp holder panel 201 contacts the contact of the limiter 303, triggering the limiter 303 to cut off the power supply to the oil pump unit of the hydraulic system 3, thereby stopping the hydraulic cylinder 301 from moving.

[0036] When the crash buffer vehicle needs to exit the working state, the control unit of the hydraulic system 3 sends a signal to unlock the latch lock 304, releasing the mechanical fixation of the guide sign light frame 2. Then, the oil pump unit restarts and performs reverse oil supply, meaning high-pressure oil flows to the rod chamber of the hydraulic cylinder 301. Simultaneously, the oil pressure is fed back to the plate balance valve 302 through the control oil circuit, pushing the valve core to actuate again, thus opening the reverse oil circuit from the outlet to the inlet. The oil pressure in the rod chamber of the hydraulic cylinder 301 increases, pushing the piston rod to contract along the cylinder body. The piston rod drives the guide sign light frame 2 to rotate downwards around the hinge point and retract. The oil in the rodless chamber of the hydraulic cylinder 301 then flows back to the oil pump unit through the reverse oil circuit of the plate balance valve 302 and the inlet.

[0037] When the guide sign light holder 2 is retracted to the horizontal position, the back of the light holder panel 201 contacts the limiter 303 located on the top of the main support 101 of the light holder base. The limiter 303 triggers and cuts off the power supply to the oil pump unit, the oil pump stops working, and the hydraulic cylinder 301 stops retracting. At this time, the plate balance valve 302 resets and locks to prevent the guide sign light holder 2 from moving accidentally in the retracted position. Finally, the top of the light holder panel 201 is lower than the cargo box sideboard, and the retraction is completed.

[0038] In some embodiments, the guide sign light frame 2 further includes a buffer block 206, which is fixed to the side wall of the main support 101 of the light frame base facing the light frame panel 201. When the guide sign light frame 2 is unfolded to the vertical position, the back of the light frame panel 201 contacts the buffer block 206. The buffer block 206 is used to reduce the impact between the light frame panel 201 and the main support 101 of the light frame base.

[0039] In some embodiments, two hydraulic cylinders 301 are provided, and the two hydraulic cylinders 301 correspond one-to-one with the two main supports 101 of the lamp holder base. The cylinder body of each hydraulic cylinder 301 is hinged to the inner side wall of the corresponding main support 101 of the lamp holder base via a hinge shaft, and the piston rod end of each hydraulic cylinder 301 is hinged to the back of the lamp holder panel 201 via a hinge shaft.

[0040] The symmetrically distributed hydraulic cylinders 301 achieve balanced force distribution during the unfolding and retraction of the guide sign light frame 2, effectively preventing structural deformation such as twisting and bending of the light frame panel 201 due to unilateral force, thus extending the service life of the components. Furthermore, the adaptive hinge connection between the cylinder body and the inner wall of the main support 101 of the light frame base, and between the piston rod end and the back of the light frame panel 201, precisely matches the motion trajectory of the guide sign light frame 2 rotating around the hinge point, ensuring that the power of the hydraulic cylinders 301 is efficiently converted into the movement of the light frame, eliminating the risk of jamming, and accurately triggering components such as the limit switch 303 and the second switch 205 to achieve state switching.

[0041] As one possible implementation, the bolt lock 304 can be either a hydraulically driven bolt lock or an electromagnetically driven bolt lock. When the bolt lock 304 is a hydraulically driven bolt lock, its oil circuit is connected in parallel with the hydraulic cylinder's oil circuit to share hydraulic power. This eliminates the need for an additional independent hydraulic unit, simplifying the overall structure and reducing potential failure points. Simultaneously, it can acquire power synchronously with the hydraulic cylinder's deployment movement, allowing for rapid bolt locking when the guide sign light bracket 2 is deployed to the vertical position. Furthermore, the hydraulically driven locking force is stronger, ensuring the light bracket withstands external forces such as wind resistance and the weight of the warning system during operation, preventing loosening. When the bolt lock 304 is an electromagnetically driven bolt lock, its circuit is connected in series with the circuit of the second switch 205 to achieve synchronous signal triggering, resulting in a faster response speed.

[0042] In some embodiments, the retractable guide sign light bracket for the anti-collision buffer vehicle also includes a warning system 5. The warning system 5 is detachably connected to a standard threaded interface on the top of the extension bracket 4 via bolts, and the warning system 5 is retracted into the cargo box along with the guide sign light bracket 2.

[0043] For example, when the guide sign light holder is in the retracted state, the top of the light holder panel is lower than the top of the cargo box sideboard, and the highest height of the rear of the crash buffer vehicle is lower than the top height of the crash buffer vehicle cab.

[0044] As one possible implementation, a secondary anti-collision buffer pad 7 is installed at the rear of the chassis of the anti-collision buffer vehicle. When the anti-collision buffer vehicle is not in operation, the hydraulic system 3 starts to work, the hydraulic cylinder 301 retracts, and the guide sign light frame 2 is retracted into the cargo box. When the guide sign light frame 2 is retracted to the horizontal position and touches the limiter 303, the hydraulic system 3 stops working, the light frame is retracted, and then the secondary anti-collision buffer pad 7 begins to fold and is finally fixed horizontally on the upper part of the cargo box. After the retraction is completed, the height of the entire vehicle can be lower than the top of the cab, which can effectively reduce wind resistance and increase driving stability during driving.

[0045] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0046] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A retractable guide sign light holder for anti-collision buffer vehicles, characterized in that, The system includes a guide sign light holder base (1), a guide sign light holder (2), a hydraulic system (3), and an extension bracket (4). The guide sign light holder base (1) is installed at the rear of the cargo box of the crash buffer vehicle. The guide sign light holder (2) is hinged to the guide sign light holder base (1). The hydraulic system (3) is arranged between the guide sign light holder base (1) and the guide sign light holder (2). The extension bracket (4) is fixedly connected to the top of the guide sign light holder (2). The guide sign light holder (2) includes a light holder panel (201), LED beads (202), arrow lights (203), a first switch (204), and a second switch (205). The LED beads (202) and arrow lights (203) are both set on the light holder panel (201). The first switch (204) is embedded in the light holder. In different areas of the panel (201), the first switch (204) is used to detect whether there are obstacles on the surface of the lamp holder panel (201). When the first switch (204) detects an obstacle, the hydraulic system (3) stops working. The second switch (205) is set at the hinge position between the lamp holder panel (201) and the guide sign lamp holder base (1). The second switch (205) is used to detect whether the guide sign lamp holder (2) is unfolded to the vertical position. The hydraulic system (3) includes a hydraulic cylinder (301), a plate balance valve (302), a limiter (303), and a pin lock (304). The cylinder body of the hydraulic cylinder (301) is hinged to the guide sign lamp holder base (1), and the piston rod end of the hydraulic cylinder (301) is hinged to the guide sign lamp holder (2). The plate balance valve (302) Integrated in the hydraulic cylinder (301), the plate balance valve (302) is used to prevent the guide sign light frame (2) from falling down by gravity. The limiter (303) is fixed on the guide sign light frame base (1). When the guide sign light frame (2) is retracted to the preset position, the limiter (303) triggers and cuts off the power supply of the hydraulic system (3). The pin lock (304) is electrically connected to the second switch (205). When the second switch (205) detects that the guide sign light frame (2) is unfolded to the vertical position, the pin lock (304) automatically inserts into the lock hole of the guide sign light frame base (1) to lock the guide sign light frame (2).

2. The retractable guide sign light holder for anti-collision buffer vehicles according to claim 1, characterized in that, The guide sign light holder base (1) includes a main support (101) and a secondary support (102). Both the main support (101) and the secondary support (102) are connected to the bottom plate at the rear of the cargo box. At least two secondary supports (102) are evenly distributed between the two main supports (101).

3. The retractable guide sign light holder for anti-collision buffer vehicles according to claim 2, characterized in that, The guide sign light frame also includes a buffer block (206), which is fixed on the side wall of the main support (101) of the light frame base facing the light frame panel (201). When the guide sign light frame (2) is unfolded to the vertical position, the back of the light frame panel (201) contacts the buffer block (206).

4. The retractable guide sign light holder for anti-collision buffer vehicles according to claim 3, characterized in that, Two hydraulic cylinders (301) are provided, and the two hydraulic cylinders (301) correspond one-to-one with the two main supports (101) of the lamp holder base respectively; the cylinder body of each hydraulic cylinder (301) is hinged to the inner wall of the corresponding main support (101) of the lamp holder base through a hinge shaft, and the piston rod end of each hydraulic cylinder (301) is hinged to the back of the lamp holder panel (201) through a hinge shaft.

5. The retractable guide sign light holder for anti-collision buffer vehicles according to claim 1, characterized in that, The plate-type balance valve (302) includes an oil inlet and an oil outlet. The oil inlet of the plate-type balance valve (302) is connected to the oil pump unit of the hydraulic system, and the oil outlet of the plate-type balance valve (302) is connected to the rodless chamber of the hydraulic cylinder (301).

6. The retractable guide sign light holder for anti-collision buffer vehicles according to claim 1, characterized in that, The latch lock (304) is a hydraulically driven latch lock or an electromagnetically driven latch lock; when the latch lock (304) is a hydraulically driven latch lock, the oil circuit of the latch lock (304) is connected in parallel with the oil circuit of the hydraulic cylinder (301); when the latch lock (304) is an electromagnetically driven latch lock, the circuit of the latch lock is connected in series with the circuit of the second switch.

7. The retractable guide sign light holder for anti-collision buffer vehicles according to claim 1, characterized in that, When the guide sign light holder (2) is in the retracted state, the top of the light holder panel (201) is lower than the top of the cargo box side panel, and the highest height of the rear of the crash buffer vehicle is lower than the top height of the crash buffer vehicle cab.

8. The retractable guide sign light holder for anti-collision buffer vehicles according to claim 1, characterized in that, The first switch (204) is provided in at least three, one of which is embedded in the upper area of ​​the lamp holder panel (201), and the other two are embedded in the left edge area and the right edge area of ​​the lamp holder panel (201), respectively.

9. The retractable guide sign light holder for anti-collision buffer vehicles according to claim 1, characterized in that, The limiter (303) is a mechanical contact limiter, which is fixed on the top of the main support (101) of the lamp holder base. When the guide sign lamp holder (2) is retracted to the horizontal position, the back of the lamp holder panel (201) contacts the contact of the limiter (303), and the limiter (303) triggers and cuts off the power supply to the oil pump unit of the hydraulic system (3) to stop the hydraulic cylinder (301) from moving.

10. The retractable guide sign light holder for anti-collision buffer vehicles according to any one of claims 1 to 9, characterized in that, It also includes an early warning system (5), which is detachably connected to the standard threaded interface on the top of the extension bracket (4) by bolts, and the early warning system (5) is simultaneously stored inside the cargo box along with the guide sign light frame (2).

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