阅读说明：本技术 一种适用于市政道路具有缓冲防护功能的护栏 (Guardrail suitable for town road has buffering safeguard function ) 是由 姚江波 于 2021-09-14 设计创作，主要内容包括：本发明涉及一种护栏,尤其涉及一种适用于市政道路具有缓冲防护功能的护栏,包括有固定支撑架、滑轨板、缓冲组件、缓冲控制组件等；两固定支撑架上共同焊接有滑轨板,缓冲组件滑动式连接于固定支撑架上,缓冲控制组件设于缓冲组件上。通过护栏架摆动拉动第一支撑架及其上装置朝靠近车辆撞击处运动,进一步对车辆进行缓冲,防止失控车辆直接冲出护栏,进而能够阻挡车辆进入反向车道,避免造成更大的人员伤亡。(The invention relates to a guardrail, in particular to a guardrail with a buffer protection function and suitable for a municipal road, which comprises a fixed support frame, a slide rail plate, a buffer assembly, a buffer control assembly and the like; the two fixed support frames are welded with the slide rail plates together, the buffer assembly is connected on the fixed support frames in a sliding mode, and the buffer control assembly is arranged on the buffer assembly. The first support frame is pulled through the swing of the guardrail frame and the device on the first support frame moves towards the position close to the collision of the vehicle, the vehicle is further buffered, the out-of-control vehicle is prevented from directly rushing out of the guardrail, the vehicle can be prevented from entering a reverse lane, and the greater casualties are avoided.)

1. The utility model provides a guardrail that is applicable to town road and has buffering safeguard function which characterized in that: the shock absorption device comprises fixed support frames (1), sliding rail plates (2), a buffering assembly (3), a buffering control assembly (4) and a shock sensing assembly (5), wherein the sliding rail plates (2) are welded on the two fixed support frames (1) together, the buffering assembly (3) is connected on the fixed support frames (1) in a sliding mode, the buffering control assembly (4) is arranged on the buffering assembly (3), and the shock sensing assembly (5) is arranged on the buffering control assembly (4).

2. The guardrail applicable to the municipal roads and having the buffering and protecting functions as claimed in claim 1, is characterized in that: the buffer component (3) comprises a first support frame (31), a first sliding support frame (32), a first rotating frame (321), a first torsion spring (33), a guardrail frame (34), a second rotating frame (35), a second torsion spring (36), a third torsion spring (37), a fixed support block (38), a second sliding support frame (39), a rotating roller (310) and a first spring (311), wherein the fixed support frame (1) is connected with the first support frame (31) in a sliding way, the slide rail plate (2) is connected with two first sliding support frames (32) in a sliding way, one first sliding support frame (32) is connected with the first rotating frame (321) in a rotating way, the first rotating frame (321) is connected with one first support frame (31) in a rotating way, the first torsion spring (33) is fixedly connected to the top surface of the first support frame (31) at the same position, one end of the first torsion spring (33) is connected with the first rotating frame (321), a first rotating frame (321) is fixedly connected to the other first sliding support frame (32), the first rotating frame (321) is fixedly connected to the other first supporting frame (31), a guardrail frame (34) is rotatably connected to the first rotating frame (321) at the same position, a third torsion spring (37) is connected between the guardrail frame (34) and the first rotating frame (321), a guardrail frame (34) is fixedly connected to the first rotating frame (321) at the other position, a second rotating frame (35) is rotatably connected to the guardrail frame (34) at the position, a second rotating frame (35) is fixedly connected to the guardrail frame (34) at the other position, the guardrail frame (34) is also rotatably connected to the second rotating frame (35) at the position, and the guardrail frame (34) is fixedly connected to the second rotating frame (35) at the other position, wherein be connected with second torsion spring (36) between three guardrail frames (34) and second rotating turret (35), fixedly connected with two pairs of fixed supporting shoe (38) on slide rail board (2), slide rail board (2) go up the sliding connection have three second slip support frame (39), symmetry rotary type is connected with live-rollers (310) on second slip support frame (39), same symmetry rotary type is connected with live-rollers (310) on first slip support frame (32), fixed supporting shoe (38) both sides rigid coupling has first spring (311), wherein two first spring (311) one end and first slip support frame (32) hookup, in addition three pairs of first spring (311) one end and second slip support frame (39) hookup.

3. The guardrail suitable for the municipal road with the buffering and protecting functions as claimed in claim 2, wherein: the buffer control assembly (4) comprises a second support frame (41), a sliding limiting block (42), a second spring (421), a clamping column plate (43), a supporting limiting frame (44), a slotting frame (45) and a third spring (46), wherein the second support frame (41) is welded on the bottom surface of the three guardrail frames (34), the sliding limiting block (42) is connected on the second support frame (41) in a sliding manner, the second sliding support frame (39) is connected with the sliding limiting block (42) in a limiting manner, the second spring (421) is connected on the sliding limiting block (42) in a connecting manner, one end of the second spring (421) is connected with the second support frame (41), the clamping column plate (43) is welded on the top end of the sliding limiting block (42), the supporting limiting frame (44) is symmetrically and fixedly installed on the second support frame (41), the slotting frame (45) is connected on the supporting limiting frame (44) in a sliding manner, the slotting frame (45) is in limiting fit with the clamping column plate (43), a third spring (46) is connected between the slotted frame (45) and the supporting and limiting frame (44).

4. The guardrail suitable for the municipal road with the buffering and protecting functions as claimed in claim 3, wherein: the impact sensing assembly (5) comprises a first transmission plate (51), a second transmission plate (52), a fourth spring (53), a third transmission plate (54) and a fifth spring (55), the first transmission plate (51) is fixedly installed on the slotting frame (45), the second transmission plate (52) is connected to the first transmission plate (51) in a sliding mode, the fourth spring (53) is connected to the first transmission plate (51) in a linkage mode, the third transmission plate (54) is fixedly connected to one end of the fourth spring (53), the third transmission plate (54) is connected with the first transmission plate (51) in a sliding mode, and the fifth spring (55) is connected between the first transmission plate (51) and the second transmission plate (52).

5. The guardrail suitable for the municipal road with the buffering and protecting functions as claimed in claim 4, wherein: still including warning subassembly (6), warning subassembly (6) are located on second rotating turret (35), warning subassembly (6) are including wedge jack-post frame (61), swing span (62), fourth torsion spring (63) and phosphor strip (64), be connected with wedge jack-post frame (61) with the mode of liftable on second rotating turret (35), wedge jack-post frame (61) and guardrail frame (34) contact, the last rotation type of second rotating turret (35) is connected with swing span (62), wedge jack-post frame (61) and swing span (62) are spacing connection, be connected with a pair of fourth torsion spring (63) between swing span (62) and second rotating turret (35), be provided with two pairs of phosphor strips (64) on swing span (62).

6. The guardrail suitable for the municipal road with the buffering and protecting functions as claimed in claim 5, wherein: still including preventing silt component (7), prevent silt component (7) and set up on fixed bolster (1), prevent silt component (7) including backup pad (71) and telescopic baffle (72), the rigid coupling has backup pad (71) on fixed bolster (1), common rigid coupling has telescopic baffle (72) on two backup pads (71), telescopic baffle (72) and slide rail board (2) are contacted each other, telescopic baffle (72) are passed in slip stopper (42), telescopic baffle (72) are passed in first slip support frame (32) equally.

Technical Field

The invention relates to a guardrail, in particular to a guardrail with a buffering and protecting function, which is suitable for a municipal road.

Background

The guardrail is an industrial guardrail and is an iron fence arranged on a roadside or between a sidewalk and a lane to play a role in protection, and the bridge guardrail is a guardrail arranged on a bridge, so that the purpose of preventing an out-of-control vehicle from crossing the bridge is to prevent the corresponding out-of-control vehicle from breaking through, passing down, turning over the bridge or entering an opposite lane, and the functions of enabling the out-of-control vehicle to change the driving direction and beautifying a bridge building are achieved.

When vehicles on a road have traffic accidents or lose control and collide against guardrails, the conventional road guardrail has no way of providing enough safety protection, even potential safety hazards are increased for personnel in the vehicles, the existing road guardrail can not prevent the out-of-control vehicles from directly rushing out of the guardrails, and the existing road guardrail has no way of preventing the vehicles from entering a reverse lane, so that more casualties are easily caused.

Disclosure of Invention

The invention aims to provide a guardrail which can buffer vehicles, can prevent the vehicles from entering a reverse lane, can prompt traffic accidents at the positions behind and opposite vehicles and is suitable for municipal roads and has a buffering and protecting function, so as to solve the problems that the conventional road guardrail in the background art cannot provide enough safety protection and cannot prevent the vehicles from entering the reverse lane.

The technical scheme of the invention is as follows: the utility model provides a guardrail suitable for town road has buffering safeguard function, has striking perception subassembly including fixed stay frame, slide rail board, buffering subassembly, buffer control subassembly and striking perception subassembly, and the common welding has the slide rail board on two fixed stay frames, and buffering subassembly sliding connection is on fixed stay frame, and on buffer control subassembly located the buffering subassembly, the last striking perception subassembly that is provided with of buffer control subassembly.

As a preferred technical scheme of the invention, the buffer assembly comprises a first support frame, a first sliding support frame, a first rotating frame, a first torsion spring, a guardrail frame, a second rotating frame, a second torsion spring, a third torsion spring, a fixed support block, a second sliding support frame, a rotating roller and a first spring, wherein the first support frame is connected on the fixed support frame in a sliding way, two first sliding support frames are connected on the sliding rail plate in a sliding way, one first sliding support frame is connected with the first rotating frame in a rotating way, the first rotating frame is connected with one first support frame in a rotating way, the top surface of the first support frame is fixedly connected with the first torsion spring, one end of the first torsion spring is connected with the first rotating frame, the other first sliding support frame is fixedly connected with the first rotating frame, the first rotating frame is fixedly connected with the other first support frame, the guardrail frame is connected on the same first rotating frame in a rotating way, a third torsion spring is connected between the guardrail frame and the first rotating frame at the position, a guardrail frame is fixedly connected on the other first rotating frame, a second rotating frame is rotatably connected on the guardrail frame at the position, a second rotating frame is fixedly connected on the other guardrail frame, the guardrail frame is also rotatably connected on the second rotating frame at the position, a second rotating frame is also fixedly connected on the guardrail frame at the position, the guardrail frame is also rotatably connected on the second rotating frame at the position, the guardrail frame is fixedly connected with the other second rotating frame at the position, wherein a second torsion spring is connected between the three guardrail frames and the second rotating frame, two pairs of fixed supporting blocks are fixedly connected on the slide rail plate, three second sliding supporting frames are slidably connected on the slide rail plate, rotating rollers are symmetrically and rotatably connected on the second sliding supporting frames, rotating rollers are also symmetrically and rotatably connected on the first sliding supporting frames, and first springs are fixedly connected on two sides of the fixed supporting blocks, one end of each of the two first springs is connected with the first sliding support frame, and one end of each of the other three pairs of first springs is connected with the second sliding support frame.

According to a preferred technical scheme, the buffer control assembly comprises a second support frame, a sliding limiting block, a second spring, a column clamping plate, a supporting limiting frame, a slotting frame and a third spring, wherein the second support frame is welded on the bottom faces of the three guardrail frames, the sliding limiting block is connected on the second support frame in a sliding mode, the second sliding support frame is in limiting connection with the sliding limiting block, the second spring is connected on the sliding limiting block in a connecting mode, one end of the second spring is connected with the second support frame, the column clamping plate is welded on the top end of the sliding limiting block, the supporting limiting frame is symmetrically and fixedly installed on the second support frame, the slotting frame is connected on the supporting limiting frame in a sliding mode, the slotting frame is in limiting fit with the column clamping plate, and the third spring is connected between the slotting frame and the supporting limiting frame.

As a preferable technical scheme, the impact sensing assembly comprises a first transmission plate, a second transmission plate, a fourth spring, a third transmission plate and a fifth spring, the first transmission plate is fixedly installed on the slotted frame, the second transmission plate is connected with the first transmission plate in a sliding mode, the fourth spring is connected with the first transmission plate in a connecting mode, one end of the fourth spring is fixedly connected with the third transmission plate, the third transmission plate is connected with the first transmission plate in a sliding mode, and the fifth spring is connected between the first transmission plate and the second transmission plate.

As a preferred technical scheme, the multifunctional guardrail protection device further comprises a warning assembly, the warning assembly is arranged on the second rotating frame and comprises a wedge-shaped clamping column frame, a swinging frame, a fourth torsion spring and fluorescent strips, the wedge-shaped clamping column frame is connected to the second rotating frame in a lifting mode and is in contact with the guardrail frame, the swinging frame is rotatably connected to the second rotating frame and is in limit connection with the swinging frame, the pair of fourth torsion springs is connected between the swinging frame and the second rotating frame, and two pairs of fluorescent strips are arranged on the swinging frame.

As a preferred technical scheme of the invention, the mud-sand prevention device further comprises a mud-sand prevention assembly, wherein the mud-sand prevention assembly is arranged on the fixed support frame and comprises support plates and telescopic baffles, the support plates are fixedly connected to the fixed support frame, the two support plates are fixedly connected to the telescopic baffles, the telescopic baffles are in mutual contact with the slide rail plates, the sliding limiting block penetrates through the telescopic baffles, and the first sliding support frame also penetrates through the telescopic baffles.

The invention has the following advantages:

through the effect of fourth spring and fifth spring for first driving plate, second driving plate or third driving plate cushion the vehicle, can reduce the impact force of vehicle striking, protect personnel in the car.

The first support frame is pulled through the swing of the guardrail frame and the device on the first support frame moves towards the position close to the collision of the vehicle, the vehicle is further buffered, the out-of-control vehicle is prevented from directly rushing out of the guardrail, the vehicle can be prevented from entering a reverse lane, and the greater casualties are avoided.

The swinging frame swings upwards, so that the coming vehicles behind and opposite can clearly see the fluorescent strips, the fluorescent strips can prompt that traffic accidents happen to the coming vehicles behind and opposite, and the coming vehicles behind and opposite can conveniently change lanes to run.

Drawings

Fig. 1 is a schematic perspective view of a first embodiment of the present invention.

Fig. 2 is a schematic perspective view of a second embodiment of the present invention.

FIG. 3 is a schematic view of a first partially separated body structure of the cushioning assembly of the present invention.

FIG. 4 is a schematic view of a second partially separated body structure of the cushioning assembly of the present invention.

FIG. 5 is a perspective view of a third portion of a cushioning assembly of the present invention.

Fig. 6 is a schematic perspective view of a portion of the damping control assembly according to the present invention.

Fig. 7 is a schematic perspective view of the damping control assembly according to the present invention.

Fig. 8 is a perspective view of the impact sensing assembly of the present invention.

Fig. 9 is a schematic perspective view of a warning device according to the present invention.

Fig. 10 is a schematic perspective view of the silt preventing assembly of the present invention.

Wherein: 1-a fixed support frame, 2-a slide rail plate, 3-a buffer component, 31-a first support frame, 32-a first slide support frame, 321-a first rotating frame, 33-a first torsion spring, 34-a guardrail frame, 35-a second rotating frame, 36-a second torsion spring, 37-a third torsion spring, 38-a fixed support block, 39-a second slide support frame, 310-a rotating roller, 311-a first spring, 4-a buffer control component, 41-a second support frame, 42-a slide limiting block, 421-a second spring, 43-a column clamping plate, 44-a support limiting frame, 45-a slotted frame, 46-a third spring, 5-an impact sensing component, 51-a first transmission plate, 52-a second transmission plate and 53-a fourth spring, 54-a third transmission plate, 55-a fifth spring, 6-a warning component, 61-a wedge-shaped clamping column frame, 62-a swinging frame, 63-a fourth torsion spring, 64-a fluorescent strip, 7-a silt prevention component, 71-a support plate and 72-a telescopic baffle.

Detailed Description

In order to make the technical solution and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1

The utility model provides a guardrail that has buffering safeguard function suitable for town road, as shown in fig. 1-8, including fixed stay frame 1, slide rail board 2, buffering subassembly 3, buffer control subassembly 4 and striking perception subassembly 5, the common welding has slide rail board 2 on two fixed stay frames 1 for carry out the buffering subassembly 3 sliding type connection that cushions to the vehicle on fixed stay frame 1, buffer control subassembly 4 is located on buffering subassembly 3, is provided with striking perception subassembly 5 on the buffer control subassembly 4.

The buffer component 3 comprises a first support frame 31, a first sliding support frame 32, a first rotating frame 321, a first torsion spring 33, a guardrail frame 34, a second rotating frame 35, a second torsion spring 36, a third torsion spring 37, a fixed support block 38, a second sliding support frame 39, a rotating roller 310 and a first spring 311, the first support frame 31 is connected on the fixed support frame 1 in a sliding way, two first sliding support frames 32 are connected on the slide rail plate 2 in a sliding way, the first rotating frame 321 is connected on one first sliding support frame 32 in a rotating way, the first rotating frame 321 is connected with one first support frame 31 in a rotating way, the first torsion spring 33 is fixedly connected on the top surface of the first support frame 31, one end of the first torsion spring 33 far away from the first support frame 31 is connected with the first rotating frame 321, the first rotating frame 321 is fixedly connected on the other first sliding support frame 32, and the first rotating frame 321 is fixedly connected with the other first support frame 31, a guardrail frame 34 is rotatably connected to the first rotating frame 321, the guardrail frame 34 is used for preventing the vehicle from entering the reverse lane, a third torsion spring 37 is connected between the guardrail frame 34 and the first rotating frame 321, a guardrail frame 34 is fixedly connected to the first rotating frame 321, a second rotating frame 35 is rotatably connected to the guardrail frame 34, a second rotating frame 35 is fixedly connected to the guardrail frame 34, the guardrail frame 34 is also rotatably connected to the second rotating frame 35, a second rotating frame 35 is also fixedly connected to the guardrail frame 34, the guardrail frame 34 is also rotatably connected to the second rotating frame 35, the guardrail frame 34 is fixedly connected to the second rotating frame 35, a second torsion spring 36 is connected between the three guardrail frames 34 and the second rotating frame 35, two pairs of fixed supporting blocks 38 are fixedly connected to the slide rail plate 2, and a third second sliding supporting frame 39 is rotatably connected to the slide rail plate 2, the second sliding support frame 39 is symmetrically and rotatably connected with a rotating roller 310, the first sliding support frame 32 is also symmetrically and rotatably connected with the rotating roller 310, the rotating roller 310 is used for reducing friction between the second sliding support frame 39 and the sliding rail plate 2, two sides of the fixed support block 38 are fixedly connected with first springs 311, one ends of two first springs 311 far away from the fixed support block 38 are connected with the first sliding support frame 32, and one ends of the other three pairs of first springs 311 far away from the fixed support block 38 are connected with the second sliding support frame 39.

The buffer control assembly 4 comprises a second support frame 41, a sliding limit block 42, a second spring 421, a column clamping plate 43, a support limit frame 44, a slotted frame 45 and a third spring 46, wherein the second support frame 41 is welded on the bottom surface of the three guardrail frames 34, the sliding limit block 42 is slidably connected on the second support frame 41, the second sliding support frame 39 is in limit connection with the sliding limit block 42, the second sliding support frame 39 is used for clamping the sliding limit block 42, the sliding limit block 42 is connected with the second spring 421 in a linkage manner, one end of the second spring 421 far away from the sliding limit block 42 is connected with the second support frame 41, the column clamping plate 43 is welded on the top end of the sliding limit block 42, the support limit frames 44 are symmetrically and fixedly installed on the second support frame 41, the slotted frame 45 is slidably connected on the support limit frame 44, the slotted frame 45 is in limit fit with the column clamping plate 43, the slotted frame 45 is used for pushing the column clamping plate 43 and the sliding limit block 42 to move upwards, a third spring 46 is connected between the slotted frame 45 and the support limiting frame 44.

The impact sensing assembly 5 comprises a first transmission plate 51, a second transmission plate 52, a fourth spring 53, a third transmission plate 54 and a fifth spring 55, the first transmission plate 51 is fixedly installed on the slotted frame 45, the second transmission plate 52 is connected to the first transmission plate 51 in a sliding mode, the fourth spring 53 is connected to the first transmission plate 51 in a coupling mode, the third transmission plate 54 is fixedly connected to one end, far away from the first transmission plate 51, of the fourth spring 53, the third transmission plate 54 is connected with the first transmission plate 51 in a sliding mode, and the fifth spring 55 is connected between the first transmission plate 51 and the second transmission plate 52.

The equipment is arranged on a road, the fixed support frame 1 is arranged on the ground in a bolt connection mode, and one part of the slide rail plate 2 is buried in the ground. When the vehicles on the road lose control and collide with the equipment, the vehicles collide with the first transmission plate 51, the second transmission plate 52 or the third transmission plate 54, and the first transmission plate 51, the second transmission plate 52 or the third transmission plate 54 can buffer the vehicles through the action of the fourth spring 53 and the fifth spring 55, so that the impact force of vehicle collision can be reduced, and people in the vehicles can be protected. The first transmission plate 51 can drive one slotting frame 45 to move towards the direction close to the second rotating frame 35, the slotting frame 45 can push the clamping column plate 43 and the sliding limiting block 42 to move upwards, then the second sliding support frame 39 is separated from the sliding limiting block 42, the slotting frame 45 can be in contact with the supporting limiting frame 44, the slotting frame 45 pushes the supporting limiting frame 44 and the upper device thereof to move towards the direction away from the sliding rail plate 2, the guardrail frame 34 swings, the guardrail frame 34 can pull the first support frame 31 and the upper device thereof to move towards the position close to the vehicle impact, the vehicle is further buffered, the vehicle out of control is prevented from directly rushing out of the guardrail, and the vehicle can be prevented from entering the reverse lane. The rotating roller 310 is used to reduce the friction between the second sliding support frame 39 and the sliding track plate 2, so that the first support frame 31 and the device thereon can move smoothly towards the place near the vehicle collision.

When the vehicle leaves the device, the vehicle is separated from the first transmission plate 51, the second transmission plate 52 or the third transmission plate 54, the compressed first spring 311 resets to drive the first sliding support frame 32 and the device thereon to move away from the vehicle impact position, the first torsion spring 33, the second torsion spring 36 or the third torsion spring 37 resets to drive the guardrail frame 34 to swing and reset, the compressed third spring 46 resets to drive the slotted frame 45 to move away from the second rotating frame 35, the slotted frame 45 pushes the clamping column plate 43 and the sliding limiting block 42 to move downwards, and the second sliding support frame 39 blocks the sliding limiting block 42.

Example 2

On the basis of embodiment 1, as shown in fig. 9, still including warning subassembly 6, warning subassembly 6 is located on second rotating turret 35, warning subassembly 6 is used for the suggestion back and to there being the traffic accident to driver here on the oncoming traffic, warning subassembly 6 is including wedge-shaped card post frame 61, swing span 62, fourth torsion spring 63 and phosphor strip 64, be connected with wedge-shaped card post frame 61 with the mode of liftable on the second rotating turret 35, wedge-shaped card post frame 61 contacts with guardrail frame 34, the last rotation type of second rotating turret 35 is connected with swing span 62, wedge-shaped card post frame 61 and swing span 62 are spacing to be connected, be connected with a pair of fourth torsion spring 63 between swing span 62 and the second rotating turret 35, be provided with two pairs of phosphor strips 64 on the swing span 62, phosphor strip 64 is used for indicateing other drivers.

When the guardrail frame 34 swings, the guardrail frame 34 can push the wedge-shaped clamping column frame 61 to move upwards, the wedge-shaped clamping column frame 61 can push the swing frame 62 to swing upwards, so that drivers behind and opposite coming vehicles can clearly see the fluorescent bars 64, and the fluorescent bars 64 prompt the drivers behind and opposite coming vehicles that traffic accidents happen at the positions, so that the drivers behind and opposite coming vehicles can conveniently change lanes to drive. When the guardrail frame 34 swings and resets, the guardrail frame 34 is separated from the wedge-shaped clamp column frame 61, the compressed fourth torsion spring 63 resets to drive the swing frame 62 to swing and reset, and the swing frame 62 pushes the wedge-shaped clamp column frame 61 to move downwards.

Example 3

On the basis of embodiment 2, as shown in fig. 10, still including preventing silt subassembly 7, prevent silt subassembly 7 and set up on fixed bolster 1, prevent silt subassembly 7 and be used for preventing that silt from dropping to slide rail board 2 inside, prevent silt subassembly 7 including backup pad 71 and telescopic baffle 72, the rigid coupling has backup pad 71 on fixed bolster 1, common rigid coupling has telescopic baffle 72 on two backup pads 71, telescopic baffle 72 and slide rail board 2 contact each other, slide stopper 42 passes telescopic baffle 72, telescopic baffle 72 is used for blocking slide rail board 2, first slide bolster 32 passes telescopic baffle 72 equally.

When the first support frame 31 and the upper device thereof move towards the position close to the vehicle impact point, the first sliding support frame 32 can push the telescopic baffle plate 72 to stretch, so that the telescopic baffle plate 72 can always block the sliding rail plate 2, silt is prevented from dropping to the inside of the sliding rail plate 2, and the equipment cannot run.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.