A liftable height limit device for highways

Abstract

The present invention relates to the field of highway height limit technology, and particularly to a liftable highway height limit device, which solves the problem that in the prior art, the highway height limit devices on the market usually perform lifting adjustment by the cooperation of sliders and chutes when adjusting the cross beam. After long-term wear, the sliders are extremely prone to loss and need to be replaced regularly by personnel, which increases the use cost of enterprises and also increases the workload of personnel, and is not conducive to the quick and convenient use of the device. A liftable highway height limit device includes a first straight rod and a second straight rod. A connection groove is opened at the top of the first straight rod, and a top cover is fixedly connected to the top of the connection groove. And a motor is installed at the bottom of the inner cavity of the connection groove. The present invention avoids the situation in the traditional method that the sliders are easily worn after long-term use and need to be replaced regularly by personnel, facilitates the quick use by personnel, reduces the use cost of enterprises, and increases the overall service life of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of highway height limit, and particularly relates to a liftable height limit device for highways. Background Art

[0002] The height limit device is used to limit the height of passing vehicles, and is generally set at the entrance of tunnels, bridge openings, etc. to prevent overly tall vehicles from driving in and avoid the top of these vehicles from colliding with facilities such as the top of the tunnel and the top of the bridge opening, playing a protective role for these road facilities. However, with the rapid expansion of cities, more height limit devices are used to prevent large trucks from entering the urban area during the day, so height limit devices will be set on the main roads entering the city and released at night.

[0003] Application No. 202021553117.X discloses a height limit pole. Although it avoids damage to the carriage body after the vehicle collides with the height limit pole, the broken glass is difficult to clean during the cleaning process, and at the same time, it poses a safety hazard to the safe driving of subsequent vehicles. And before the installation of the new tempered glass, the height limit pole cannot achieve the height limit function. At the same time, during the installation process of the tempered glass, multiple people need to cooperate.

[0004] However, the highway height limit devices on the market usually adjust the crossbeam by the cooperation of a slider and a chute for lifting adjustment. The long-term wear is extremely likely to cause damage to the slider, and it needs to be replaced regularly by personnel, increasing the use cost of enterprises and also increasing the work burden of personnel, which is not conducive to the quick and convenient use of the device. Therefore, a liftable height limit device for highways is needed. Summary of the Invention

[0005] The purpose of the present invention is to provide a liftable height limit device for highways, which solves the problem that the highway height limit devices on the market usually adjust the crossbeam by the cooperation of a slider and a chute for lifting adjustment. The long-term wear is extremely likely to cause damage to the slider, and it needs to be replaced regularly by personnel, increasing the use cost of enterprises and also increasing the work burden of personnel, which is not conducive to the quick and convenient use of the device.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A liftable height limit device for highways includes a first straight rod and a second straight rod. A connection groove is opened at the top of the first straight rod, and a top cover is fixedly connected to the top of the connection groove. A threaded rod is rotatably arranged in the connection groove, and a nut sleeve is sleeved outside the threaded rod. An installation groove is opened at the top of the second straight rod, and a top cover is fixedly connected to the top of the installation groove. A crossbeam is horizontally arranged between the first straight rod and the second straight rod. Gaskets are respectively slidably arranged at both ends of the crossbeam along its length, and telescopic rods are fixedly arranged at the ends of the gaskets away from the crossbeam;

[0008] One end of the telescopic rod far from the cross beam is fixedly connected with a slider. Limiting grooves adapted to the sliders are formed on the outer walls of one side of the first straight rod and the second straight rod. One side of the nut sleeve is fixedly connected to one end of the adjacent slider. The other end of the slider far from the cross beam is fixedly connected with a connecting block located in the inner cavity of the installation groove and adapted to the installation groove. The top of the connecting block is elastically connected to the top cover through a plurality of springs;

[0009] An infrared detector for monitoring the height of the driving vehicle is provided at one end of the cross beam close to the vehicle driving direction;

[0010] A moving plate is provided on one side of the cross beam far from the vehicle driving direction. A rotating rod is connected between the moving plate and the cross beam. A motor for controlling the swinging of the rotating rod is provided on the cross beam. The two ends of the rotating rod distributed along the length direction are respectively hinged to the cross beam and the moving plate. Warning lights are respectively fixedly provided at the two ends of the moving plate distributed along the length;

[0011] By rotating the threaded rod, the height of the cross beam is adjusted in different situations. The infrared detector detects the height of the passing vehicles, and then compares the height of the vehicle with the height of the cross beam at the current stage. The driver is reminded through the warning lights. And when the vehicle touches the cross beam, the cross beam moves while the vehicle continues to drive. At the same time, the telescopic rod stretches to avoid damage to the cross beam. When the telescopic rod extends to the limit position, it drives the gasket to move on the cross beam, further increasing the driving resistance of the vehicle.

[0012] The present invention has at least the following beneficial effects:

[0013] 1. When in use by personnel, the motor runs to drive the nut sleeve to move upward or downward, so that the slider and the cross beam move and adjust together. The limiting groove limits the movement direction of the slider to the vertical state, ensuring the stability of the cross beam during the adjustment process. The side plate ensures the stable state of the roller. Through the cooperation of the roller and the moving groove, the cross beam will not shake left and right during the displacement process, further increasing the stability of the cross beam. The movement of the cross beam drives the other end to move together with the connecting block inside the installation groove of the second straight rod. The spring ensures that the connecting block is always subjected to an upward pulling force to maintain the balance at both ends of the cross beam, avoiding the situation in the traditional method that the slider is easily worn after long-term use and needs to be replaced regularly by personnel. It is convenient for personnel to use quickly, reduces the use cost of the enterprise, and increases the service life of the whole device.

[0014] 2. The setting of the motor facilitates personnel to control the rotation duration of the threaded rod, avoiding severe friction between the threaded rod and the top cover, making the rotation of the threaded rod smoother. The setting of the roller and the moving groove ensures that the slider does not sway and collide with the inner wall of the limit groove during displacement. The setting of the hatch facilitates personnel to quickly repair the motor. The setting of the spring enables the connecting block to drive one end of the crossbeam to maintain balance.

[0015] 3. When the vehicle touches the crossbeam, as the vehicle continues to move, it drives the crossbeam to move, thereby stretching the telescopic rod, avoiding direct damage to the crossbeam due to a large impact force borne instantaneously, which may cause significant losses. At the same time, if not repaired in time, it is likely to cause damage to traffic facilities by over-height vehicles.

[0016] 4. The infrared detector and the indicator light measure the height of passing vehicles and give prompts to avoid misjudgment of the vehicle height by the driver and collision with the crossbeam. If a collision occurs, the buzzer gives a reminder to the driver again. When the telescopic rod is stretched to near the limit position, the moving plate knocks on the carriage during its descent, while supplementing the hardness of the crossbeam to avoid plastic deformation of the crossbeam. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of the present invention;

[0019] Figure 2 It is a schematic structural diagram of the connection groove of the present invention;

[0020] Figure 3 It is a schematic structural diagram of the roller of the present invention;

[0021] Figure 4 It is a schematic structural diagram of the installation groove of the present invention;

[0022] Figure 5 It is a schematic structural diagram of the crossbeam in Embodiment 2 of the present invention;

[0023] Figure 6 It is Figure 5 a schematic structural diagram in another direction;

[0024] Figure 7 It is Figure 6 a schematic structural diagram in another direction;

[0025] Figure 8 Schematic structural diagram of the working between the moving plate and the cross beam

[0026] In the figure: 1. First straight rod; 2. Second straight rod; 3. Base; 4. Warehouse door; 5. Hinge; 6. Handle; 7. Drain pipe; 8. Top cover; 9. Rotating motor; 10. Inclined plate; 11. Threaded rod; 12. Nut sleeve; 13. Rotating shaft; 14. Limit groove; 15. Moving groove; 16. Slide block; 17. Side plate; 18. Roller; 19. Connecting block; 20. Spring; 21. Installation groove; 22. Cross beam; 23. Connecting groove; 24. Telescopic rod; 25. Rotating rod; 26. Moving plate; 27. Infrared detector; 28. Warning lamp; 29. Gasket Specific embodiments

[0027] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention

[0028] Embodiment 1

[0029] As Figures 1-4As shown in the figure, a liftable height limit device for roads includes a first straight rod 1 and a second straight rod 2. A connection groove 23 is opened at the top of the first straight rod 1, and a top cover 8 is fixedly connected to the top of the connection groove 23. And a rotating motor 9 is installed at the bottom of the inner cavity of the connection groove 23. The top of the rotating motor 9 is drivingly connected to a threaded rod 11, and the end of the threaded rod 11 away from the rotating motor 9 is rotatably connected to the bottom of the adjacent top cover 8. A nut sleeve 12 is sleeved outside the threaded rod 11. An installation groove 21 is opened at the top of the second straight rod 2, and a top cover 8 is fixedly connected to the top of the installation groove 21. A cross beam 22 is horizontally arranged between the first straight rod 1 and the second straight rod 2, and sliders 16 are fixedly connected to both ends of the cross beam 22. Limiting grooves 14 adapted to the sliders 16 are opened on the outer walls of one side of the first straight rod 1 and the outer walls of one side of the second straight rod 2, and moving grooves 15 are opened on both inner wall sides of the limiting grooves 14. Side plates 17 are fixedly connected to both sides of the outer walls of the two sliders 16, and a plurality of rollers 18 are arranged between the two side plates 17 and along the vertical direction of the side plates 17. And both ends of the rollers 18 are respectively rotatably connected to one side of the adjacent side plates 17. A fixed connection is made between one side of the nut sleeve 12 and one end of the adjacent slider 16. A connection block 19 adapted to the installation groove 21 is fixedly connected to the end of the other slider 16 away from the cross beam 22 and located inside the installation groove 21. The top of the connection block 19 is elastically connected to the adjacent top cover 8 through a plurality of springs 20. Specifically, when in use by personnel, the personnel control the rotating motor 9 to give the threaded rod 11 rotational power, so that the nut sleeve 12 makes an upward or downward displacement, driving the sliders 16 and the cross beam 22 to move and adjust together. The movement direction of the sliders 16 is limited to the vertical state through the limiting grooves 14, ensuring the stability of the cross beam 22 during the adjustment process. The stable state of the rollers 18 is ensured through the side plates 17. Through the cooperation of the rollers 18 and the moving grooves 15, the cross beam 22 will not shake left and right during the displacement process, further increasing the stability of the cross beam 22. When the cross beam 22 moves, it drives the other end to move together with the connection block 19 inside the installation groove 21 of the second straight rod 2. Through the springs 20, it is ensured that the connection block 19 is always subjected to an upward pulling force to maintain the balance of both ends of the cross beam 22, avoiding the situation in the traditional method that the sliders 16 are easily worn after long-term use and need to be replaced regularly by personnel. It is convenient for personnel to use quickly, reduces the use cost of the enterprise, and increases the service life of the overall device.

[0030] This solution has the following working process:

[0031] When in use, the user gives the threaded rod 11 rotational power by controlling the rotating motor 9, causing the nut sleeve 12 to displace upward or downward, driving the slider 16 and the crossbeam 22 to move and adjust together. The movement direction of the slider 16 is limited to the vertical state by the limiting groove 14, ensuring the stability of the crossbeam 22 during the adjustment process. The stable state of the roller 18 is ensured by the side plate 17. Through the cooperation of the roller 18 and the moving groove 15, the crossbeam 22 will not sway left and right during displacement, further increasing the stability of the crossbeam 22. During the movement of the crossbeam 22, the other end drives the connecting block 19 located inside the installation groove 21 of the second straight rod 2 to move together. The spring 20 ensures that the connecting block 19 is always subjected to an upward pulling force to maintain the balance of both ends of the crossbeam 22.

[0032] According to the above working process, it can be known that:

[0033] It avoids the situation in the traditional method where the slider 16 is easily worn after long-term use and needs to be regularly replaced by the user. It facilitates the user to use quickly, reduces the use cost of the enterprise, and increases the overall service life of the device.

[0034] Furthermore, the bottom of the rotating motor 9 is fixedly connected to the bottom of the inner cavity of the connecting groove 23 by bolts, and there is a transmission connection between the output shaft of the rotating motor 9 and one end of the threaded rod 11. Specifically, through the setting of the rotating motor 9, it is convenient for the user to control the rotation duration of the threaded rod 11.

[0035] Furthermore, one end of the threaded rod 11 away from the rotating motor 9 is rotatably connected to the bottom of the adjacent top cover 8 through a rotating shaft 13. Specifically, through the setting of the rotating shaft 13, it avoids the severe friction between the threaded rod 11 and the top cover 8, making the rotation of the threaded rod 11 smoother.

[0036] Furthermore, an inclined plate 10 is fixedly connected to the lower part of the inner cavity of the connecting groove 23. One end of the threaded rod 11 penetrates through the inclined plate 10 and is in transmission connection with the output shaft of the rotating motor 9. A drain pipe 7 is communicated with the outer circle of the first straight rod 1 and on one side of the inclined plate 10. The outer circles of several rollers 18 are slidably connected to the inner cavity of the moving groove 15. Specifically, through the setting of the rollers 18 and the moving groove 15, the slider 16 will not sway left and right and collide with the inner wall of the limiting groove 14 during displacement.

[0037] Furthermore, a hatch door 4 is rotatably connected to the lower part of the outer wall of one side of the first straight rod 1 through a hinge 5, and a handle 6 is fixedly connected to one side of the hatch door 4. Bases 3 are fixedly connected to the bottoms of the first straight rod 1 and the second straight rod 2. Specifically, through the setting of the bases 3, the stability of the bottom of the device is increased. Through the setting of the hinge 5 and the handle 6, it is convenient for the user to open the hatch door 4. Through the setting of the hatch door 4, it is convenient for the user to quickly repair the rotating motor 9.

[0038] Further, a plurality of springs 20 are respectively fixedly connected to the four top corners of the connecting block 19, and the other ends of the plurality of springs 20 are respectively fixedly connected to the four bottom corners of the adjacent top cover 8. Specifically, through the arrangement of the springs 20, the connecting block 19 drives one end of the cross beam 22 to maintain balance.

[0039] In summary, when in use, the user controls the rotation motor 9 to give the threaded rod 11 rotational power, so that the nut sleeve 12 moves upward or downward, driving the slider 16 and the cross beam 22 to move and adjust together. The movement direction of the slider 16 is limited to the vertical state by the limiting groove 14, ensuring the stability of the cross beam 22 during the adjustment process. The side plate 17 ensures the stable state of the roller 18. Through the cooperation of the roller 18 and the moving groove 15, the cross beam 22 will not shake left and right during the displacement process, further increasing the stability of the cross beam 22. When the cross beam 22 moves, it drives the other end to move together with the connecting block 19 located inside the installation groove 21 of the second straight rod 2. Through the spring 20, it is ensured that the connecting block 19 is always subjected to an upward pulling force to maintain the balance of both ends of the cross beam 22. Through the arrangement of the rotation motor 9, it is convenient for the user to control the rotation time of the threaded rod 11, avoiding violent friction between the threaded rod 11 and the top cover 8, making the rotation of the threaded rod 11 smoother. Through the arrangement of the roller 18 and the moving groove 15, when the slider 16 is displaced, it will not shake left and right and collide with the inner wall of the limiting groove 14. Through the arrangement of the base 3, the stability of the bottom of the device is increased. Through the arrangement of the hinge 5 and the handle 6, it is convenient for the user to open the door 4. Through the arrangement of the door 4, it is convenient for the user to quickly repair the rotation motor 9. Through the arrangement of the spring 20, the connecting block 19 drives one end of the cross beam 22 to maintain balance, avoiding the situation in the traditional method that the slider 16 is easily worn after long-term use and needs to be replaced regularly by the user. It is convenient for the user to use quickly, while reducing the use cost of the enterprise and increasing the service life of the whole device.

[0040] Embodiment 2

[0041] Based on Embodiment 1, although Embodiment 1 solves the problems of height adjustment of the cross beam in different situations and convenient maintenance of the device, during the use of the cross beam, due to the driver's incorrect estimation of the height of the vehicle, the vehicle body collides with the cross beam, causing damage to the vehicle and the cross beam. And when the vehicle collides with the cross beam, if the vehicle gets stuck under the cross beam, the vehicle cannot move normally, resulting in traffic jams. To solve the above technical problems, the following improvements are made.

[0042] As Figures 5-8As shown, washers 29 are slidably provided at both ends of the cross beam 22 along the length thereof, a telescopic rod 24 is fixedly provided at one end of the washers 29 away from the cross beam 22, and a slider 16 is fixedly connected to one end of the telescopic rod 24 away from the cross beam 22, and the telescopic rod 24 and the cross beam 22 are connected via the washers 29. When a vehicle collides with the cross beam 22, in order to protect the cross beam 22 from bending and deformation under the impact, after the vehicle collides with the cross beam 22, the cross beam 22 is pushed by the vehicle to extend the telescopic rod 24, and the cross beam 22 is driven to move, thereby reducing the impact force of the vehicle on the cross beam 22, thereby achieving the purpose of protecting the cross beam 22 and reducing damage to the vehicle.

[0043] The telescopic rod 24 is preferably a four-section sleeve, of which the movable sleeve is three sections, and a return spring is connected between the nested rod and the adjacent rod, wherein the elastic force of the return spring between the first two sections of the sleeve is less than the friction between the gasket 29 and the beam 22, and the elastic force of the return spring of the last section of the sleeve is greater than the friction between the gasket 29 and the beam 22, that is, when the telescopic rod 24 stretches the first two sections of the sleeve, the position of the gasket 29 on the beam 22 does not change, and when the telescopic rod 24 is stretched to the last section of the sleeve, the gasket 29 moves a short distance with the movement of the beam 22 and then stops. It should be noted that the moving direction of the gasket 29 is the same as the stretching direction of the telescopic rod 24, and the gasket 29 does not leave the connection range of the beam 22. At this time, the last section of the sleeve of the telescopic rod 24 is stretched with the movement of the beam 22.

[0044] At the same time, the cross beam 22 is supported by the hardness of the telescopic rod 24, thereby preventing the horizontal height of the cross beam 22 from changing during the movement and causing damage to the vehicle.

[0045] like Figure 8As shown in the figure, an infrared detector 27 for monitoring the height of a moving vehicle is provided at one end of the cross beam 22 close to the vehicle driving direction. The infrared detector 27 is located in the groove of the cross beam 22 to prevent damage to the infrared detector 27 caused by vehicle impact. At both ends of the moving plate 26 distributed along its length, warning lights 28 are respectively fixed, so that when the vehicle comes into direct contact with the moving plate 26, the warning lights 28 are in a relatively safe position and will not be damaged by the impact of the vehicle. The initial position of the moving plate 26 is on the side of the cross beam 22 close to the ground, compensating for the height of the cross beam 22. By measuring the height of the vehicle with the infrared detector 27, the height of the moving plate 26 from the ground after the cross beam 22 moves, and the height of the cross beam 22 from the ground, the infrared detector 27 compares the heights among the vehicle height, the cross beam 22 and the moving plate 26, and uploads the data analyzed by the infrared detector 27 to the control center, which is located inside the cross beam 22. Thus, according to the height of the vehicle, the control center regulates the warning lights 28 to emit different colors to remind whether the vehicle driven by the driver can pass, and at the same time, it also avoids the situation of damage to the vehicle and the cross beam 22 when the driver misjudges the vehicle height, reducing the probability of the driver misjudging the height.

[0046] A motor for controlling the swing of the rotating rod 25 is provided on the cross beam 22. By controlling the rotation of the rotating rod 25 with the motor, the position of the moving plate 26 can be moved. At the same time, the infrared detector 27 can control the color of the warning lights 28 through the control center. The color of the warning lights 28 can control the rotation of the motor, and the rotation of the motor can also be controlled by the movement of the gasket 29. That is, when the moving direction of the gasket 29 is the same as the vehicle driving direction, the motor controls the rotating rod 25 to rotate, causing the moving plate 26 to rise and be located on the side of the cross beam 22 away from the vehicle driving direction.

[0047] At the same time, in order to protect the moving plate 26 and the vehicle, the material of the moving plate 26 is set as a rubber material with poor flexibility.

[0048] The detection situations of the infrared detector 27 are divided into three types:

[0049] When the vehicle can pass normally, that is, the distance between the vehicle and the moving plate 26 is greater than or equal to 50 cm, the color of the warning lights 28 is green at this time, reminding the driver that they can pass normally, and the position of the moving plate 26 will not change at this time;

[0050] When the height of the vehicle approaches the height of the cross beam 22, that is, the distance between the vehicle and the cross beam 22 is between 1 cm and 50 cm, excluding 50 cm, the color of the warning light 28 is yellow, reminding the driver to slow down. At this time, in order to enhance the driver's sensitivity to the light sense, the warning light 28 feeds back the color to the control center, so that the motor drives the moving plate 26 to move regularly, realizing the regular movement of the light source of the warning light 28, attracting the driver's attention, and prompting the driver to slow down. At the same time, when the vehicle touches the moving plate 26 and does not contact the cross beam 22, the motor drives the moving plate 26 to rebound, and the moving plate 26 is placed on the side of the cross beam 22 away from the vehicle driving direction, so that the vehicle passes through the height limit device at a slow speed. Since the material of the moving plate 26 is rubber material, when the vehicle touches the moving plate 26, it will not damage the vehicle body. At this time, the cross beam 22 does not move, the telescopic rod 24 is not stretched, and the motor does not have the premise to quickly flip the moving plate 26;

[0051] When the height of the vehicle is higher than the height of the cross beam 22, that is, the distance between the vehicle and the cross beam 22 is less than or equal to 0 cm, the color of the warning light 28 is red, prompting the driver to prohibit entry to avoid traffic jams caused by the vehicle being unable to pass after entering. At this time, the warning light 28 shakes with the moving plate 26. At the same time, when the vehicle touches the moving plate 26, the motor drives the moving plate 26 to rebound, and the moving plate 26 is placed on the side of the cross beam 22 away from the vehicle driving direction. At this time, after the vehicle touches the cross beam 22, in order to protect the cross beam 22, the cross beam 22 moves together with the movement of the vehicle, and at the same time drives the telescopic rod 24 to extend to offset the impact force of the vehicle on the cross beam 22. At this time, the motor has the premise to quickly flip the moving plate 26. Since the elastic force of the return spring of the last section of the sleeve of the telescopic rod 24 is greater than the friction force between the gasket 29 and the cross beam 22, that is, when the first two sections of the sleeve of the telescopic rod 24 are stretched, the position of the gasket 29 on the cross beam 22 does not change. When the telescopic rod 24 is stretched to the last section of the sleeve, the gasket 29 moves a short distance and then stops with the movement of the cross beam 22. Thus, the movement of the gasket 29 is transmitted to the control center, and the control center issues a rotation command to the motor, driving the moving plate 26 to knock on the carriage, further reminding the driver to pay attention while increasing the contact area between the height limit device and the vehicle to protect the cross beam 22 from being quickly damaged. At the same time, the last section of the telescopic rod 24 is set to offset the braking distance of the vehicle after the moving plate 26 knocks.

[0052] When the vehicle continues to move and drives the cross beam 22 to move, it is easy to cause the part of the cross beam 22 that contacts the vehicle to bend, thereby causing the over-height vehicle to escape and cause damage to subsequent road facilities. In order to avoid the cross beam 22 being damaged by the continuous movement of the vehicle that collides with the cross beam 22 and then passing through the height limiting device, a movable plate 26 is provided on the side of the cross beam 22 away from the driving direction of the vehicle, and a rotating rod 25 is connected between the movable plate 26 and the cross beam 22, wherein the rotating force of the rotating rod 25 comes from the motor, and the two ends of the rotating rod 25 distributed along the length direction are respectively hinged to the cross beam 22 and the movable plate 26, and as the rotating rod 25 moves, the movable plate 26 is driven to move to one side of the ground, so that the movable plate 26 moves to the lower side of the cross beam 22, and when the movable plate 26 resists the vehicle, the cross beam 22 is supplemented, thereby further constraining the position of the vehicle, avoiding plastic deformation of the cross beam 22, and the movable plate 26 makes a sound after contacting the vehicle, further reminding the driver to pay attention to the situation outside the car, avoiding irreparable damage to the height limiting rod.

[0053] When the driver is distracted and enters the height-restricted section by mistake, he still drives the vehicle forward, and after hitting the crossbeam 22, the crossbeam 22 and the telescopic rod 24 are stretched, so that the data is transmitted to the control center through the movement of the telescopic rod 24. A buzzer is provided on the second straight rod 2, and the buzzer is controlled by the control center to make a sound, reminding the driver to stop in time and exit the height-restricted road.

[0054] The height of passing vehicles is detected by the infrared detector 27, and then compared with the height of the cross beam 22 at the current stage. The data analyzed by the infrared detector 27 is uploaded to the control center, and the control center reminds the driver through the regulation of the warning light 28, which facilitates the driver to quickly identify whether the vehicle can pass through the cross beam 22 normally, reduces the problem that the driver is distracted during driving to consider whether the vehicle height can pass normally, and improves the traffic safety and efficiency. However, since some drivers may be distracted during driving, their ability to judge the prompt of the warning light 28 is low. They drive into the height-limited road under the premise that the warning light 28 shows a red light, resulting in a collision between the vehicle and the cross beam 22, causing traffic jams. And when the vehicle touches the cross beam 22, the vehicle continues to move and drives the cross beam 22 to move, and then drives the telescopic rod 24 to stretch, avoiding the cross beam 22 being damaged after instantaneously bearing a large impact force. And the stretching of the telescopic rod 24 is uploaded to the control center, and the buzzer on the second straight rod 2 is controlled by the control center to remind the driver in the carriage. If the vehicle continues to move, when the telescopic rod 24 is stretched to the last section of the sleeve, the gasket 29 moves and then stops as the cross beam 22 moves. At this time, the last section of the sleeve of the telescopic rod 24 is stretched as the cross beam 22 moves. With the movement of the rotating rod 25, the moving plate 26 moves towards the ground side, so that the moving plate 26 moves under the cross beam 22. When the moving plate 26 touches the vehicle, it supplements the cross beam 22, thereby further restricting the position of the vehicle and avoiding plastic deformation of the cross beam 22. And when the moving plate 26 contacts the vehicle, it makes a sound, further reminding the driver to pay attention to the situation outside the carriage and avoiding irreparable damage to the height-limiting rod. When the vehicle exits the cross beam 22 with the assistance of the management personnel, the telescopic rod 24 returns to its initial length under the action of the return spring, and at the same time the buzzer stops working, and the gasket 29 returns to its initial position. Thus, the position of the rotating rod 25 is regulated by the control center to drive the moving plate 26 to move to the side of the cross beam 22.

[0055] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. An elevating height limit device for roads, characterized in that, It includes a first straight rod and a second straight rod. A connection groove is formed at the top of the first straight rod, and a top cover is fixedly connected to the top of the connection groove. A threaded rod is rotatably arranged in the connection groove, and a nut sleeve is sleeved outside the threaded rod. An installation groove is formed at the top of the second straight rod, and a top cover is fixedly connected to the top of the installation groove. A cross beam is horizontally arranged between the first straight rod and the second straight rod. Gaskets are respectively slidably arranged at both ends of the cross beam along its length, and telescopic rods are fixedly arranged at one ends of the gaskets away from the cross beam. A control center for regulating the motor after receiving instructions is arranged in the cross beam; Sliders are fixedly connected to the ends of the telescopic rods away from the cross beam. Limit grooves adapted to the sliders are respectively formed on the outer walls of one sides of the first straight rod and the second straight rod. One side of the nut sleeve is fixedly connected to one end of the adjacent slider. A connection block located in the inner cavity of the installation groove and adapted to the installation groove is fixedly connected to the end of the other slider away from the cross beam. The top of the connection block is elastically connected to the top cover through a plurality of springs; The telescopic rod is a four-section sleeve, with three of them being movable sleeves. A return spring is arranged between the nested rod and the adjacent rod. The elastic force of the return spring between the first two sections of the sleeve is less than the frictional force between the gasket and the cross beam, and the elastic force of the return spring of the last section of the sleeve is greater than the frictional force between the gasket and the cross beam; An infrared detector for monitoring the height of the driving vehicle is arranged at one end of the cross beam close to the vehicle driving direction; A moving plate is arranged on one side of the cross beam away from the vehicle driving direction. A rotating rod is connected between the moving plate and the cross beam. A motor for controlling the swinging of the rotating rod is arranged on the cross beam. The two ends of the rotating rod along its length are respectively hinged to the cross beam and the moving plate. Warning lights are respectively fixedly arranged at both ends of the moving plate along its length; And a rotating motor is installed at the bottom of the inner cavity of the connection groove. The transmission end of the rotating motor is connected to the threaded rod, and the end of the threaded rod away from the rotating motor is rotatably connected to the bottom of the top cover. The bottom of the rotating motor is fixedly connected to the bottom of the inner cavity of the connection groove through bolts, and the output shaft of the rotating motor is in transmission connection with one end of the threaded rod; The height of the crossbeam is adjusted by rotating the threaded rod under different circumstances. The infrared detector detects the height of passing vehicles, and then compares the height of the vehicle with the height of the crossbeam at the current stage, and reminds the driver through the warning light. When the vehicle touches the crossbeam, the crossbeam moves while the vehicle continues to move forward, and at the same time the telescopic rod elongates to avoid damage to the crossbeam. When the telescopic rod extends to the limit position, it drives the gasket to move on the crossbeam, further increasing the driving resistance of the vehicle. The infrared detector is located in the groove of the crossbeam to avoid damage to the infrared detector caused by vehicle impact. When the telescopic rod stretches the first two sections of the sleeve, the position of the gasket on the crossbeam does not change. When the telescopic rod stretches to the last section of the sleeve, the gasket moves a short distance and then stops as the crossbeam moves. Thus, the movement of the gasket is transmitted to the control center, and the control center issues a rotation command to the motor, which drives the moving plate to knock on the carriage. While further reminding the driver to pay attention, it increases the contact area between the height limit device and the vehicle, protects the crossbeam from being quickly damaged, and at the same time sets the last section of the telescopic rod to offset the braking distance of the vehicle after the moving plate knocks.

2. The elevating height limit device for roads according to claim 1, characterized in that, Moving grooves are provided on both inner wall sides of the limiting groove. On both sides of the outer walls of the slider, side plates are fixedly connected, and a plurality of rollers are arranged between the two side plates and along the vertical direction of the side plates. The rollers are rotatably connected between the two side plates.

3. The elevating height limit device for roads according to claim 2, characterized in that, An inclined plate is fixedly connected to the lower part of the inner cavity of the connecting groove. One end of the threaded rod penetrates through the inclined plate and is in transmission connection with the output shaft of the rotating motor. A drain pipe is communicated with the outer circle of the first straight rod and on one side of the inclined plate. The outer circles of a plurality of rollers are slidably connected to the inner cavity of the moving groove.

4. The elevating height limit device for roads according to claim 3, characterized in that, A hatch door is rotatably connected to the lower part of the outer wall on one side of the first straight rod through a hinge, and a handle is fixedly connected to one side of the hatch door. Bases are fixedly connected to the bottoms of the first straight rod and the second straight rod.

5. The elevating height limit device for roads according to claim 4, characterized in that, A plurality of springs are respectively fixedly connected to the four top corners of the top of the connecting block, and the other ends of the plurality of springs are respectively fixedly connected to the four bottom corners of the adjacent top cover.

6. The elevating height limit device for roads according to claim 5, characterized in that, The detection situation of the infrared detector is divided into three types. When the vehicle can pass normally, the color of the warning light is green. When the height of the vehicle is close to the height of the crossbeam, the color of the warning light is yellow to remind the driver to pay attention. When the height of the vehicle is higher than the height of the crossbeam, the color of the warning light is red to prompt the driver to prohibit entry.

7. The elevating height limit device for roads according to claim 6, characterized in that, A buzzer is provided on the second straight rod.

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