A type of lifting height limit bar

Abstract

This utility model relates to the field of highway equipment technology and discloses a lifting height restriction bar, including a mounting base plate. Mounting frames are fixedly connected to the top left and right sides of the mounting base plate. A hydraulic cylinder is fixedly connected inside the mounting frames. A drive rod is fixedly connected to the drive end of the hydraulic cylinder. A support mounting plate is fixedly connected to the top of the drive rod. A height restriction plate is fixedly connected to the outside of the support mounting plate. A disassembly and assembly mechanism is fixedly connected to the outside of the height restriction plate. A positioning mechanism is slidably connected to the outside of the support mounting plate. In this utility model, when disassembling or assembling the height restriction bar, pressing and rotating the clamping plate compresses the telescopic rod, causing the return spring to deform and the positioning rod to separate, allowing it to be removed. During installation, after placing the height restriction bar, releasing the clamping plate causes the spring to return and lock the rod in place. The operation is simple and quick, the bar is securely fixed, and it facilitates the replacement and maintenance of the height restriction bar, improving the flexibility and efficiency of equipment use.

Description

Technical Field

[0001] This utility model relates to the field of highway equipment technology, and in particular to a lifting height limit bar. Background Technology

[0002] As an important facility for road traffic safety management, rising height restriction bars are widely used in bridges, tunnels, culverts, factory entrances and other road sections. By restricting the passage of over-height vehicles, they ensure the safety of road infrastructure and passing vehicles. Existing rising height restriction bars are mostly composed of columns, beams, lifting drive mechanisms and control systems. The lifting mechanism drives the beams to rise and fall, thereby adjusting the height restriction.

[0003] The working principle of some existing lifting height limit bars is based on mechatronics control. The core consists of a detection unit, a control unit, and an execution unit. When a vehicle approaches, the sensor installed near the height limit bar will detect the vehicle height in real time and transmit the data to the control system. The control system compares the detection data with the preset height limit parameters. If the vehicle height exceeds the limit, it will immediately issue a command to drive the hydraulic device or electric push rod in the execution unit to work. The hydraulic system pressurizes the hydraulic cylinder through the oil pump to extend and retract.

[0004] However, in actual use, when roads are temporarily constructed due to maintenance or repair, or when the height restriction needs to be adjusted due to large-scale events or accident handling, the non-removable height restriction sign will cause the height restriction information to be unable to be updated in a timely manner. For example, if a road section that originally had a height restriction of 4 meters needs to be temporarily restricted to 2.5 meters due to construction, the fixed height restriction sign will mislead drivers into thinking that they can still pass normally, which can easily cause problems such as vehicle congestion and road blockage. In response to the above problems, a liftable height restriction bar is proposed. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a lifting height restriction bar, which aims to improve the problem that some existing lifting height restriction bars cannot be disassembled and reassembled with height restriction signs.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A lifting height limit bar includes a mounting base plate, with mounting frames fixedly connected to the top left and right sides of the mounting base plate. A hydraulic cylinder is fixedly connected inside the mounting frame, and a drive rod is fixedly connected to the drive end of the hydraulic cylinder. A support mounting plate is fixedly connected to the top of the drive rod, and a height limit plate is fixedly connected to the outside of the support mounting plate. A disassembly and assembly mechanism is fixedly connected to the outside of the height limit plate, and a positioning mechanism is slidably connected to the outside of the support mounting plate.

[0008] The disassembly and assembly mechanism includes an installation block, which is externally and fixedly connected to the inside of the height restriction plate. Installation brackets are fixedly connected to both the left and right sides of the installation block. A connecting shaft is fixedly connected inside the installation bracket. A rotating plate is rotatably connected to the outside of the connecting shaft. A reset component is fixedly connected to the outside of the rotating plate. A positioning rod is fixedly connected to the outside of the rotating plate. A height restriction sign is fixedly connected to the front side of the height restriction plate.

[0009] As a further description of the above technical solution:

[0010] The reset assembly includes a telescopic rod, which is fixedly connected to the outside of the rotating plate, and a reset spring is sleeved on the outside of the telescopic rod.

[0011] As a further description of the above technical solution:

[0012] The positioning mechanism includes a sliding latch rod, which is slidably connected to the outside of the support mounting plate. The support mounting plate has a cavity inside, and a limit plate is slidably connected inside the cavity. A tension spring is sleeved on the outside of the sliding latch rod, and a limit latch rod is slidably connected to the outside of the height limit plate.

[0013] As a further description of the above technical solution:

[0014] The limiting plate is fixedly connected to the outside of the sliding rod, and the outside of the sliding rod is slidably connected to the inside of the cavity;

[0015] As a further description of the above technical solution:

[0016] The outer side of the limiting rod is locked to the outer side of the sliding rod, and the outer side of the sliding rod is locked to the inner side of the height limiting plate;

[0017] As a further description of the above technical solution:

[0018] The external of the positioning rod is locked to the external left and right sides of the height limit sign, and the external of the rotating plate is rotatably connected to the inside of the mounting frame;

[0019] As a further description of the above technical solution:

[0020] A transverse support plate is fixedly connected to one of the two adjacent sides of the mounting frame. Slide grooves are provided on the left and right sides of the outside of the mounting frame, and the outside of the sliding rod is slidably connected to the inside of the slide groove.

[0021] As a further description of the above technical solution:

[0022] One end of the tension spring is fixedly connected to the outside of the limiting plate, and the other end of the tension spring is fixedly connected to the inside of the cavity.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, when disassembling and assembling the height restriction sign, press and rotate the card plate to squeeze the telescopic rod to deform the return spring, and the positioning rod can be separated and removed. When installing, after placing the height restriction sign, release the card plate, and the spring will rebound to drive the locking rod to lock. The operation is simple and quick, the fixation is stable, and it is convenient to replace and maintain the height restriction sign, thereby improving the flexibility and efficiency of equipment use.

[0025] 2. In this utility model, the starting hydraulic cylinder can drive the height limit plate to slide and adjust the height. When positioning, the limit lever is pulled to unlock. After the sliding lever compresses the tension spring, it resets and locks the height limit plate and the limit lever. The adjustment is flexible, the positioning is stable, the operation is convenient, and the height limit can be accurately controlled. It can adapt to different scenario needs and improve the practicality and reliability of the height limit equipment. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of a lifting height limit bar proposed in this utility model;

[0027] Figure 2 This is a schematic diagram of the drive rod of a lifting height limit bar proposed in this utility model;

[0028] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0029] Figure 4 This is a schematic diagram of the structure of a height restriction sign with a lifting height restriction bar proposed in this utility model.

[0030] Legend:

[0031] 1. Mounting base plate; 2. Mounting frame; 3. Hydraulic cylinder; 4. Drive rod; 5. Support mounting plate; 6. Height limit plate; 7. Mounting block; 8. Mounting bracket; 9. Connecting shaft; 10. Telescopic rod; 11. Return spring; 12. Rotating clamping plate; 13. Positioning clamping rod; 14. Height limit sign; 15. Horizontal support plate; 16. Sliding clamping rod; 17. Cavity; 18. Limiting plate; 19. Tension spring; 20. Limiting clamping rod; 21. Slide groove. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0033] Reference Figures 1 to 3 This utility model provides an embodiment of a lifting height limit bar, including a mounting base plate 1. The main function of the mounting base plate 1 is to provide a stable mounting foundation for the entire height limit bar device, transferring the weight of the device and the impact force to the ground, preventing the height limit bar from tilting or falling during use, and ensuring its installation firmness and stability. Mounting frames 2 are fixedly connected to the top left and right sides of the mounting base plate 1. The mounting frames 2 are symmetrically distributed on both sides of the mounting base plate 1, providing a closed mounting space for the hydraulic cylinders 3. The hydraulic cylinders 3 are fixedly connected inside the mounting frames 2, serving as the power source for the lifting and lowering of the height limit bar. The hydraulic cylinders 3 are driven by the pressure oil provided by the hydraulic pump to extend and retract the piston, thereby driving the drive rod 4 to move up and down. This system enables height adjustment of the height limit plate 6, featuring high output force, stable operation, and convenient speed adjustment. It can precisely control the lifting height of the height limit plate 6. The drive end of the hydraulic cylinder 3 is fixedly connected to the drive rod 4. The function of the drive rod 4 is to transmit the driving force of the hydraulic cylinder 3, converting the extension and retraction of the piston rod into the lifting and retraction of the support mounting plate 5, and extending the drive stroke of the hydraulic cylinder 3 so that the height limit plate 6 can reach the required height limit. The top of the drive rod 4 is fixedly connected to the support mounting plate 5. The support mounting plate 5 serves as the mounting carrier for the height limit plate 6, connecting the height limit plate 6 and the drive rod 4 into a whole, bearing the weight of the height limit plate 6 and transmitting it to the drive rod 4 and the hydraulic cylinder 3. The support mounting plate 5 is fixedly connected to the outside of the height limit plate 6.

[0034] The height restriction plate 6 is the core component for achieving the height restriction function. When a vehicle's height exceeds the limit value, it will collide with the height restriction plate 6, thereby preventing oversized vehicles from passing and avoiding accidents caused by them entering the height-restricted section. The reflective strips can be illuminated by vehicle lights at night, serving as a warning. The height restriction plate 6 is externally fixed with a disassembly and assembly mechanism, and the supporting mounting plate 5 is externally slidably connected with a positioning mechanism. The positioning mechanism includes a sliding latch 16, which, by engaging with the positioning hole of the mounting frame 2, relatively fixes the supporting mounting plate 5 to the mounting frame 2, thus achieving the height restriction function of the height restriction plate 6. The height is locked. The sliding lever 16 is externally slidably connected to the outside of the support mounting plate 5. The support mounting plate 5 has a cavity 17 inside. The cavity 17 is a rectangular cavity opened along the sliding direction of the sliding lever 16. The length is slightly greater than the sliding stroke of the sliding lever 16, and the width and height are slightly greater than the size of the limiting plate 18. It provides installation and movement space for the limiting plate 18 and the tension spring 19, and at the same time guides the movement of the limiting plate 18 to ensure that it slides in a straight line. The limiting plate 18 is slidably connected inside the cavity 17.

[0035] The limiting plate 18 restricts the sliding range of the sliding lever 16, preventing the sliding lever 16 from completely dislodging from the support mounting plate 5. At the same time, it provides a force fulcrum for the tension spring 19, allowing the tension spring 19 to push the limiting plate 18 to reset the sliding lever 16. The tension spring 19 is sleeved on the outside of the sliding lever 16. When the sliding lever 16 is released, the tension spring 19 releases potential energy, pushing the limiting plate 18 and the sliding lever 16 to automatically reset, so that the sliding lever 16 re-engages into the positioning hole, realizing the automatic locking of the positioning mechanism and ensuring the reliability of the locking action. The height limit plate 6 is externally slidably connected to the limiting lever 20. The main function of the limiting lever 20 is to assist in fixing the relative position of the height limit plate 6 and the support mounting plate 5, preventing the height limit plate 6 from shifting or shaking when subjected to lateral force, enhancing the tightness and stability of the connection between the two, and further ensuring the installation firmness of the height limit plate 6 in conjunction with the disassembly and assembly mechanism.

[0036] The disassembly and assembly mechanism includes an installation block 7, which provides a stable installation base for components such as the mounting bracket 8 and the connecting shaft 9. It connects the disassembly and assembly mechanism with the height limit plate 6 as a whole, enabling the components to work together and achieve quick disassembly and assembly of the height limit plate 6 and the supporting mounting plate 5. The external of the installation block 7 is fixedly connected to the inside of the height limit plate 6. The left and right sides of the external of the installation block 7 are fixedly connected to the mounting bracket 8. The distance between the two mounting brackets 8 matches the length of the rotating clamping plate 12. The mounting bracket 8 has internally machined shaft holes that match the diameter of the connecting shaft 9, providing stable support for the connecting shaft 9 and ensuring that the connecting shaft 9 does not wobble during rotation. The connecting shaft 9 is fixedly connected inside the mounting bracket 8. The connecting shaft 9 serves as the rotation center of the rotating clamping plate 12, providing a fulcrum for the rotating clamping plate 12 to rotate freely around the connecting shaft 9, thereby realizing the clamping and releasing action of the positioning clamping rod 13. The rotating clamping plate 12 is rotatably connected to the outside of the connecting shaft 9. The rotating clamping plate 12 can rotate around the connecting shaft 9 under external force. Its main function is to transmit the elastic force of the reset component and the external operating force, driving the positioning clamping rod 13 to move, so that the positioning clamping rod 13 can accurately engage or disengage from the slot of the support mounting plate 5.

[0037] To achieve rapid connection and separation between the height restriction plate 6 and the support mounting plate 5, a reset assembly is fixedly connected to the outside of the rotating clamp 12. The reset assembly includes a telescopic rod 10. The main function of the telescopic rod 10 is to provide installation guidance for the reset spring 11, limit the extension and retraction direction of the reset spring 11, prevent the reset spring 11 from bending or twisting laterally under force, and ensure that the reset spring 11 can extend and retract stably along the axial direction, thereby providing a stable reset force for the rotating clamp 12. The telescopic rod 10 is externally fixedly connected to the outside of the rotating clamp 12, and the reset spring 11 is sleeved on the outside of the telescopic rod 10. When the rotating clamp 12 rotates outward, it will drive the telescopic rod 10 to extend, and the reset spring 11 will be stretched and store elastic potential energy. When the rotating clamp 12 is released, the reset spring 11 releases elastic potential energy and pulls the rotating clamp 12. The plate 12 rotates inward to reset, so that the positioning rod 13 is firmly inserted into the slot of the support mounting plate 5, ensuring that the height limit plate 6 and the support mounting plate 5 are firmly connected. The positioning rod 13 is fixedly connected to the outside of the rotating plate 12. By inserting it into the slot of the support mounting plate 5, the height limit plate 6 and the support mounting plate 5 are mechanically locked, preventing the height limit plate 6 from falling off due to vibration or collision during use. At the same time, when it is necessary to disassemble, simply pull the rotating plate 12 to disengage the positioning rod 13 from the slot. The operation is convenient. The height limit sign 14 is fixedly connected to the front of the outside of the height limit plate 6. The height limit sign 14 is installed in a conspicuous position on the height limit plate 6, which can clearly display the height limit information to passing vehicles, remind drivers in advance whether the vehicle height meets the passage requirements, avoid over-height vehicles from accidentally entering the height limit section, and enhance the warning effect of the height limit bar.

[0038] Reference Figures 2 to 4The limiting plate 18 is internally fixedly connected to the outside of the sliding rod 16, and the outside of the sliding rod 16 is slidably connected to the inside of the cavity 17. This strictly limits the sliding stroke of the sliding rod 16, preventing it from completely dislodging from the cavity 17. Simultaneously, it provides a reliable force point for the tension spring 19, ensuring that the tension spring 19 can stably apply elastic force to the sliding rod 16, keeping it in a preset position when no external force is applied. The outside of the limiting rod 20 is locked to the outside of the sliding rod 16, and the outside of the sliding rod 16 is locked to the inside of the height limit plate 6. The outside of the positioning rod 13 is locked to the left and right sides of the height limit sign 14. The outside of the rotating plate 12 is rotatably connected to the inside of the mounting bracket 8, which provides a stable support for the rotating plate 12. The support ensures that the rotating plate 12 will not wobble or shift during rotation, thereby ensuring that the positioning rod 13 can accurately lock or disengage with the corresponding component. A transverse support plate 15 is fixedly connected to the adjacent side of each of the two mounting frames 2. Slide grooves 21 are provided on the left and right sides of the outer side of the mounting frame 2. The outer side of the sliding rod 16 is slidably connected to the inside of the slide groove 21. One end of the tension spring 19 is fixedly connected to the outside of the limiting plate 18, and the other end is fixedly connected to the inside of the cavity 17. When unlocking is required, external force pulls the sliding rod 16 to compress the tension spring 19, storing elastic potential energy. When the external force is removed, the tension spring 19 releases its elastic potential energy, pushing the sliding rod 16 to automatically reset and re-lock into the positioning hole, ensuring the reliability of the locking action.

[0039] Working principle: When disassembling and assembling the height restriction sign 14, pressing the rotating plate 12 causes it to press the telescopic rod 10, which in turn presses the return spring 11, causing the return spring 11 to deform. This causes the rotating plate 12 to move the positioning rod 13 away from the height restriction sign 14, allowing the height restriction sign 14 to be removed. When installing the height restriction sign 14, it is placed inside the height restriction plate 6. Releasing the rotating plate 12 causes the return spring 11 to spring back, causing the rotating plate 12 to move the positioning rod 13 to lock into place with the height restriction sign 14, thus enabling the installation of the height restriction sign 14.

[0040] By activating hydraulic cylinder 3, the hydraulic cylinder 3 drives the drive rod 4 to move. Under the action of the drive rod 4, the height limiting plate 6 slides inside the mounting base plate 1 via the support mounting plate 5. When positioning the height limiting plate 6, by pulling the limit locking rod 20, the sliding locking rod 16 can be released. Then, by pulling the sliding locking rod 16, the sliding locking rod 16 slides in the cavity via the limit plate 18. Inside 17, the limiting plate 18 can then compress the tension spring 19, causing the tension spring 19 to be in a deformed state. This allows the sliding latch 16 to separate from the height limit plate 6, which in turn causes the height limit plate 6 to separate from the support mounting plate 5. The tension spring 19 can then be reset, allowing the sliding latch 16 to lock onto the height limit plate 6. Finally, the sliding latch 16 can lock onto the limiting latch 20, thus achieving the positioning of the height limit plate 6.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A height pole for lifting, comprising a mounting plate (1), characterized in that: The top left and right sides of the mounting base plate (1) are fixedly connected to the mounting frame (2). The inside of the mounting frame (2) is fixedly connected to the hydraulic cylinder (3). The driving end of the hydraulic cylinder (3) is fixedly connected to the driving rod (4). The top of the driving rod (4) is fixedly connected to the support mounting plate (5). The outside of the support mounting plate (5) is fixedly connected to the height limit plate (6). The outside of the height limit plate (6) is fixedly connected to the disassembly and assembly mechanism. The outside of the support mounting plate (5) is slidably connected to the positioning mechanism. The disassembly and assembly mechanism includes an installation block (7), which is externally fixedly connected to the interior of the height restriction plate (6). The installation block (7) is fixedly connected to the left and right sides of the exterior of the installation block (7). The installation bracket (8) is fixedly connected to the interior of the installation bracket (8). The connecting shaft (9) is rotatably connected to the exterior of the connecting shaft (9). The rotating plate (12) is fixedly connected to the exterior of the rotating plate (12). The positioning rod (13) is fixedly connected to the exterior of the rotating plate (12). The height restriction sign (14) is fixedly connected to the front exterior of the height restriction plate (6).

2. The lifting height limit bar according to claim 1, characterized in that: The reset assembly includes a telescopic rod (10), which is fixedly connected to the outside of the rotating plate (12), and a reset spring (11) is sleeved on the outside of the telescopic rod (10).

3. A lifting height limit bar according to claim 1, characterized in that: The positioning mechanism includes a sliding lever (16), which is slidably connected to the outside of the support mounting plate (5). The support mounting plate (5) has a cavity (17) inside, and a limiting plate (18) is slidably connected inside the cavity (17). A tension spring (19) is sleeved on the outside of the sliding lever (16), and a limiting lever (20) is slidably connected to the outside of the height limiting plate (6).

4. A lifting height limit bar according to claim 3, characterized in that: The inside of the limiting plate (18) is fixedly connected to the outside of the sliding lever (16), and the outside of the sliding lever (16) is slidably connected to the inside of the cavity (17).

5. A lifting height limit bar according to claim 4, characterized in that: The outside of the limiting lever (20) is locked to the outside of the sliding lever (16), and the outside of the sliding lever (16) is locked to the inside of the height limiting plate (6).

6. A lifting height limit bar according to claim 1, characterized in that: The outside of the positioning rod (13) is locked to the outside of the left and right sides of the height limit sign (14), and the outside of the rotating plate (12) is rotatably connected to the inside of the mounting bracket (8).

7. A lifting height limit bar according to claim 3, characterized in that: A transverse support plate (15) is fixedly connected to one side of each of the two mounting frames (2). Slide grooves (21) are provided on the left and right sides of the outside of the mounting frame (2). The sliding rod (16) is slidably connected to the inside of the slide groove (21).

8. A lifting height limit bar according to claim 3, characterized in that: One end of the tension spring (19) is fixedly connected to the outside of the limiting plate (18), and the other end of the tension spring (19) is fixedly connected to the inside of the cavity (17).

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