A smart sensor-type height limit bar adjustment device
By using a lifting mechanism and roller buffer design, combined with an intelligent control system, the problem of rigid impact on the height restriction bar when encountering vehicles at the height limit threshold is solved. This achieves automatic avoidance and flexible protection of the height restriction bar, ensuring the safe passage of vehicles and reducing equipment damage and maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHANDONG JIAZE TRANSPORTATION FACILITIES CO LTD
- Filing Date
- 2026-05-14
- Publication Date
- 2026-06-30
AI Technical Summary
Current height restriction barriers cannot effectively warn and deter vehicles from retreating or provide flexible buffering at the moment of collision when facing vehicles with critical height limits, resulting in equipment damage and vehicle injury. Furthermore, traditional devices cannot flexibly avoid collisions under extreme conditions.
The lifting mechanism converts horizontal force into vertical lifting force, and combined with roller buffer design and opening and closing components, it realizes automatic avoidance of height restriction beams. The mechanical structure and intelligent control system ensure the safe passage of vehicles.
It can stably intercept oversized vehicles under normal conditions, automatically lift when regular oversized vehicles pass by, and flexibly avoid them in extreme situations, reducing equipment damage and vehicle damage, and improving road traffic safety and equipment lifespan.
Smart Images
Figure CN122304302A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of traffic facilities, and in particular to an intelligent sensor-based height restriction bar adjustment device. Background Technology
[0002] A height restriction barrier is a traffic management facility that spans a road. Its core function is to physically limit the maximum height of vehicles passing through. It is typically installed at the entrances of bridges, tunnels, culverts, underpasses, and in front of roads in urban centers, residential areas, factory areas, or rural roads with limited load-bearing capacity. Its purpose is to prevent oversized vehicles (such as large trucks, container trucks, or construction machinery) from entering designated areas. This facility is crucial for protecting road infrastructure, effectively preventing oversized vehicles from colliding with bridge decks, tunnel walls, or overhead pipelines, thereby preventing serious structural damage, traffic disruptions, and even personal injury accidents.
[0003] Traditional height restriction barriers are mostly fixed structures with non-adjustable height, serving as a passive defense measure. However, in modern traffic management, they are gradually being integrated with intelligent sensing technology, evolving into intelligent safety barriers capable of proactive warning, automatic raising and lowering, and prioritizing the passage of emergency vehicles. For example, a municipal adjustable height restriction barrier with application number CN202110763700.6 uses a remote control to rotate a motor, which drives a winding wheel to wind and unwind a steel rope via a spur gear set. The steel rope pulls the rotating plate to swing or is manually pressed, driving a locking mechanism composed of a wedge block and a spring. This causes the bottom fixing nail to automatically insert or pull out of the ground to achieve stable anchoring and release of the base. A limiting mechanism is also used to prevent misoperation, thereby achieving vertical raising and lowering of the height restriction barrier.
[0004] However, the aforementioned existing technology, when adjusting the intelligent sensing of the height restriction bar, starts the motor via remote control, drives the spur gear to mesh and rotate, drives the winding wheels on both sides to wind up and down the steel rope, thereby pulling the height restriction bar vertically up and down to the preset position under the guidance of the slider, and uses mechanical wedge blocks or spring locking mechanisms to fix the bar at a specific height to block over-height vehicles.
[0005] However, when encountering vehicles whose height is at the critical value (such as slightly lower than or extremely close to the set height limit), drivers often take chances and attempt to force their way through the barrier due to blind spots or difficulty in accurately judging the clearance height. Since the existing device only constitutes a static obstacle at the physical level, it cannot provide early warning and dissuade vehicles from approaching, nor can it make emergency avoidance or flexible buffering reactions the moment a collision risk is detected. This results in vehicles directly impacting the rigid pole at high speed, causing the steel cable of the height limit pole to break, gears to break, or the supporting structure to be severely deformed or even collapse. This leads to high maintenance costs for the equipment and long-term traffic interruption, and may also cause serious secondary injuries to the vehicles involved and their occupants.
[0006] Based on this, and given the above viewpoints, there is still room for improvement in the existing technology for intelligent sensing of height restriction bar adjustments. Summary of the Invention
[0007] To solve the above-mentioned technical problems, this application provides an intelligent sensor-type height limit bar adjustment device, which adopts the following technical solution: An intelligent sensor-type height limit bar adjustment device includes symmetrically arranged columns, a height limit beam between the two columns, and the height limit beam is slidably connected to the columns. A lifting mechanism is provided on the height limit beam, which is used to convert horizontal force into vertical lifting force. The lifting mechanism includes multiple lifting frames installed on the height restriction beam. The lifting frames are triangular in shape, consisting of two right-angled sides and one hypotenuse, with the hypotenuse facing the direction in which the vehicle is coming. A guide groove is provided on the beveled side, and several rollers are rotatably arranged inside the guide groove.
[0008] Preferably, one end of the beveled side extends into a protruding section, the protruding section is located at the lower end of the height-limiting beam, and the guide groove extends into the protruding section; The roller extends into the guide groove of the protruding section.
[0009] Preferably, connectors are provided on both sides of the height limiting beam, and the connectors connect the height limiting beam to the column to limit the lifting height of the height limiting beam; The connector includes a sliding guide bar that is slidably mounted on the column. The sliding guide bar slides along the column. Limit seats are provided at both ends of the sliding guide bar. A screw rod is provided between the two limit seats. A sliding sleeve connected to the height-limiting beam is slidably installed on the lead screw.
[0010] Preferably, a return spring is provided between the upper end of the sliding sleeve and the limiting seat, and the return spring pushes the sliding sleeve to the lower end of the lead screw.
[0011] Preferably, the height limiting beam includes two symmetrically arranged height limiting sections, and the sliding sleeve is rotatably connected to the lead screw. An opening and closing assembly is provided between the two height limiting sections, which is used to connect and disconnect the two height limiting sections. The opening and closing assembly includes two symmetrically constructed sleeves on opposite sides of two height-limiting sections. The two sleeves are located on the corresponding height-limiting sections and are staggered. Semicircular sleeves are provided on opposite sides of the two sleeves, and a pivot pin is provided between the two sleeves. The pivot pin is used to connect the semicircular sleeves on the two height-limiting sections to form a ring.
[0012] Preferably, the pivot pin includes a pivot shaft rotatably disposed within the sleeve, and a semi-circular pin rotatably disposed at one end of the pivot shaft within the corresponding semi-circular sleeve, and the two semi-circular pins are connected within the ring sleeve to form a round pin.
[0013] Preferably, the rotating shaft has an annular groove located inside the sleeve, and the sleeve is provided with a stop block located inside the annular groove; A pin is provided inside the annular groove, and a limiting spring located inside the annular groove is provided between the pin and the stop block.
[0014] Preferably, a rotating ring is rotatably provided on the sliding sleeve, and a return spring is located between the rotating ring and the limiting seat.
[0015] In summary, this application includes at least one of the following beneficial technical effects: 1. In the normal interception mode of this invention, the rigid locking mechanism (semi-circular pin splicing) ensures the absolute stability of the height restriction beam at the normal height, effectively intercepting over-height vehicles; in the normal over-height avoidance mode, the mechanical structure automatically lifts the beam to protect compliant over-height vehicles (such as special engineering vehicles) so that they can pass smoothly; in the extreme over-height intelligent opening mode, the intelligent unlocking avoids rigid impact, prevents vehicle overturning or equipment damage, and comprehensively protects road traffic safety.
[0016] 2. During normal passage, the rollers convert sliding friction into rolling friction, and the buffer design of the protruding section prevents scratches on the vehicle paint. In the event of an extreme impact, the flexible opening mechanism (height limit section flips and separates) absorbs the impact energy, preventing damage to the vehicle chassis or breakage of the height limit bar caused by rigid collision, thus reducing accident losses and repair costs.
[0017] 3. The lifting mechanism, opening and closing components, and height limiting beam of this invention are integrated inside or on the surface of the column, resulting in a compact overall structure that does not affect the road landscape. The preload design of the reset spring and limit spring ensures long-term stable operation of the mechanism, and the modular design of the unlocking mechanism facilitates later maintenance and replacement, extending the service life of the equipment. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of the present invention.
[0019] Figure 2 This is a schematic diagram of the height-limiting beam of the present invention.
[0020] Figure 3 This is a schematic diagram of the lifting mechanism of the present invention.
[0021] Figure 4 This is a schematic diagram of the connector of the present invention.
[0022] Figure 5 This is a schematic diagram of the opening and closing component of the present invention.
[0023] Figure 6 This is a cross-sectional plan view of the opening and closing component of the present invention.
[0024] Figure 7 This is a schematic diagram of the structure of the transfer pin of the present invention.
[0025] Figure 8 This is a schematic diagram of the structure of the circular pin of the present invention.
[0026] Explanation of reference numerals in the attached drawings: 1. Column; 2. Height-limiting beam; 21. Height-limiting section; 3. Lifting mechanism; 31. Lifting frame; 32. Right-angled side; 33. Angled side; 34. Guide groove; 35. Roller; 36. Protruding section; 4. Connecting piece; 41. Sliding guide bar; 42. Limiting seat; 43. Lead screw; 44. Sliding sleeve; 45. Return spring; 5. Opening and closing assembly; 51. Sleeve seat; 52. Semicircular sleeve; 53. Ring sleeve; 6. Rotating pin; 61. Rotating shaft; 62. Semicircular pin; 63. Round pin; 64. Annular groove; 65. Stop block; 66. Pin block; 67. Limiting spring; 68. Rotating ring. Detailed Implementation
[0027] The following is in conjunction with the appendix Figures 1 to 8 This application will be described in further detail.
[0028] This application discloses an intelligent sensor-type height limit bar adjustment device, which achieves the technical effect of moving from passive protection to active avoidance.
[0029] Example 1: Reference Figure 1 and Figure 2 As shown, an intelligent sensor-type height restriction bar adjustment device includes symmetrically arranged columns 1, with a height restriction beam 2 installed between the two columns 1. The height restriction beam 2 spans between the two columns 1 and can block over-height vehicles under normal conditions. The height restriction beam 2 is slidably connected to the columns 1. A lifting mechanism 3 is installed on the height restriction beam 2. When an over-height vehicle hits the height restriction beam 2, the horizontal kinetic energy of the vehicle will exert a horizontal force on the height restriction beam 2. At this time, the lifting mechanism 3 installed on the height restriction beam 2 starts to work. It decomposes and transmits the horizontal impact force and finally converts it into a vertically upward lifting force.
[0030] The lifting mechanism 3 is used to convert the horizontal force into a vertical lifting force, causing the height restriction beam 2 to move upward, thereby avoiding the impact of the vehicle. When the impact force disappears (after the vehicle passes), the lifting mechanism 3 is released from its stress state, and the height restriction beam 2 slides back to its initial position along the column 1 under the action of gravity, restoring the height restriction function. This protects the vehicle and the height restriction bar itself from damage and also achieves automatic avoidance through the mechanical structure.
[0031] Reference Figure 3 As shown, the lifting mechanism 3 includes multiple lifting frames 31 installed on the height restriction beam 2. The lifting frame 31 has a triangular structure, consisting of two right-angled sides 32 and a hypotenuse 33, with the hypotenuse 33 facing the direction in which the vehicle is coming.
[0032] Under normal operating conditions, the height-limiting beam 2 is in a low position, the inclined side 33 of the lifting frame 31 faces outward, the roller 35 is located in a certain initial position of the guide groove 34, and the entire structure remains stationary, waiting for the vehicle to pass.
[0033] When an oversized vehicle collides with the height restriction beam 2, the impact force first acts on the inclined side 33 of the lifting frame 31. The vehicle pushes the lifting frame 31 along the inclined side 33, causing the height restriction beam 2 to rise between the two columns 1, thereby avoiding the vehicle.
[0034] A guide groove 34 is provided on the angled edge 33, and several rollers 35 are rotatably arranged in the guide groove 34. When the vehicle contacts the angled edge 33, it will first contact the rollers 35. As the vehicle moves forward, it will contact several rollers 35 on the angled edge 33 in turn. As the vehicle continues to apply thrust, the rollers 35 continuously roll upward in the guide groove 34, pushing the height restriction beam 2 to rise vertically along the slide rail of the column 1. When the height restriction beam 2 rises to exceed the height of the vehicle, the vehicle can pass smoothly, thus avoiding damage caused by rigid impact. After the vehicle passes and the impact force disappears, the height restriction beam 2 slides back to the initial position under the action of gravity, restoring the original height restriction.
[0035] One end of the beveled edge 33 extends into a protruding section 36, which is located at the lower end of the height-limiting beam 2, and the guide groove 34 extends into the protruding section 36; the roller 35 also extends into the guide groove 34 of the protruding section 36.
[0036] Because vehicles have a certain length, their roofs are often flat. When the vehicle's roof sweeps across the bottom of the height restriction beam 2, the rollers 35 extending along the protruding section 36 provide protection, converting the sliding friction between the vehicle's roof and the metal beam into rolling friction. This prevents the vehicle's roof from being rigidly scraped by the bottom of the height restriction beam 2 during passage, which could cause paint scratches or structural deformation. It also provides auxiliary guidance when the vehicle's height is at a critical value, ensuring unobstructed passage. After the vehicle passes and the horizontal thrust disappears, the height restriction beam 2 begins to fall under its own weight, reducing damage to the vehicle.
[0037] Example 2: Reference Figure 4 As shown, based on Embodiment 1, both sides of the height limiting beam 2 are provided with connectors 4. The connectors 4 connect the height limiting beam 2 and the column 1 and are used to limit the lifting height of the height limiting beam 2. During the process of the height limiting beam 2 sliding upward along the column 1 due to impact, the connectors 4 rise synchronously with the height limiting beam 2. When the height limiting beam 2 reaches the preset safe lifting height, the connectors 4 will rigidly abut against the preset limiting structure (such as the stop block 65, the edge of the slot or the mechanical flange) on the column 1.
[0038] The height range that vehicles can pass through is controlled as follows: the lower limit height is determined by the initial stationary position of the height-limiting beam 2 (i.e., when the roller 35 is at the bottom of the protruding section 36), which is used to intercept over-height vehicles; the upper limit height is determined by the contact position between the connector 4 and the limiting structure of the column 1, ensuring that the height-limiting beam 2 will not rise indefinitely when avoiding obstacles; this ensures that only vehicles that meet the height requirements can pass smoothly, while avoiding the risk of device failure under extreme working conditions, thus achieving a precise balance between safe interception and flexible avoidance.
[0039] The connector 4 includes a sliding guide 41 that is slidably mounted on the column 1. It can slide along the column 1. Limiting seats 42 are provided at both ends of the sliding guide 41. A screw rod 43 is provided between the two limiting seats 42. A sliding sleeve 44 connected to the height limiting beam 2 is slidably mounted on the screw rod 43.
[0040] When the height restriction beam 2 needs to be raised due to a vehicle collision, the sliding sleeve 44 will slide upward along the threaded trajectory of the lead screw 43, causing the height restriction beam 2 to rise along the column 1. At this time, the limiting seats 42 at both ends of the sliding guide 41 play a key role in limiting the stroke: when the sliding sleeve 44 rises to the top of the lead screw 43 or the sliding guide 41 touches the upper limit point of the column 1, the upward movement of the height restriction beam 2 is forcibly terminated, thereby determining the maximum height limit that the vehicle can pass through.
[0041] By rotating the lead screw 43, the initial position of the sliding sleeve 44 on the lead screw 43 can be finely adjusted, thereby accurately setting the initial interception height (lower limit) and the maximum height (upper limit) after lifting of the height restriction beam 2. The cooperation between the sliding guide 41 and the limit seat 42 ensures the stability of the height restriction beam 2 during the lifting process, preventing it from deflecting or shaking, so that the height range that vehicles can pass through can be accurately and reliably controlled, which not only meets the height restriction requirements of different road sections, but also ensures the safety and flexibility of the device operation.
[0042] Additionally, a return spring 45 is provided between the upper end of the sliding sleeve 44 and the limiting seat 42. The return spring 45 pushes the sliding sleeve 44 to the lower end of the lead screw 43.
[0043] Under normal conditions, the return spring 45 is in a pre-compressed state, continuously releasing downward elastic restoring force. This force acts on the sliding sleeve 44, causing it to fit tightly against the lower end of the lead screw 43, thereby driving the height limiting beam 2 to remain stably at the initial interception height, resisting slight external vibrations or wind interference, and ensuring the accuracy of the height limiting function.
[0044] When an oversized vehicle collides with the height restriction beam 2, the horizontal thrust applied by the vehicle is converted into a vertical lifting force. This force must overcome the elastic resistance of the return spring 45 in order to push the sliding sleeve 44 to slide upward along the lead screw 43, thereby raising the height restriction beam 2 to avoid collision. During this process, the elastic force of the return spring 45 plays a buffering role, ensuring that only oversized vehicles can trigger the device to lift, thus avoiding accidental triggering.
[0045] When the vehicle passes and the horizontal thrust disappears, the elastic potential energy stored in the return spring 45 is released instantly, which is converted into a downward thrust. This pushes the sliding sleeve 44 to quickly fall back to the initial position along the lead screw 43, causing the height restriction beam 2 to automatically reset to the initial interception height. No manual intervention is required, realizing the intelligent cyclic use of the device. The stiffness and preload of the return spring 45 need to be precisely calculated to ensure that the height restriction beam 2 can be smoothly lifted by compliant over-height vehicles, and to ensure that the reset is rapid and stable, avoiding rebound or jamming, and ensuring the long-term reliability of the device.
[0046] Example 3: Reference Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown in Embodiment 1 and Embodiment 2, for the special working conditions of extremely high vehicles (such as ultra-high container trucks or special transport vehicles), the traditional integral height limiting beam 2 has structural limitations: due to the physical height limitation of the lifting frame 31 itself and the constraint of the effective stroke of the lead screw 43, when the vehicle height far exceeds the preset upper limit, the roof may hit the main body of the crossbeam of the height limiting beam 2 before contacting the inclined surface of the lifting frame 31. Since the lifting effect of the lifting mechanism 3 cannot be triggered, the huge horizontal impact force will directly act on the height limiting beam 2, which can easily lead to beam deformation, breakage, or even serious damage to the vehicle.
[0047] To address this technical challenge, the height-limiting beam 2 adopts a split design. Specifically, the height-limiting beam 2 includes two symmetrically arranged height-limiting sections 21, with the sliding sleeve 44 rotatably connected to the lead screw 43. An opening and closing assembly 5 is provided between the two height-limiting sections 21, which is used to connect and disconnect the two height-limiting sections 21.
[0048] Normal connection (closed state); In normal height restriction interception mode, the opening and closing component 5 rigidly locks the two height restriction sections 21, forming a continuous and complete crossbeam. At this time, the device can effectively intercept vehicles that do not exceed the limit, just like a traditional height restriction frame, ensuring the strictness of the height restriction.
[0049] Force disconnection (open state); when an oversized vehicle forcibly passes through and its height exceeds the trigger range of the lifting mechanism 3 and directly impacts the height restriction beam 2, the opening and closing component 5 will automatically release the locking state (disconnection); at this time, the two height restriction sections 21 are no longer constrained by each other and can be opened to the sides or flipped upwards to avoid collisions under the rotation of the sliding sleeve 44.
[0050] Through the disconnection mechanism of the opening and closing component 5, the originally rigid crossbeam is instantly transformed into a movable flexible structure, allowing ultra-high vehicles to open or push the height restriction beam 2 to pass through without triggering the lifting frame 31. This avoids damage to the beam due to overload impact and also minimizes the destructive force on the vehicle, achieving safety protection across the entire height range.
[0051] The opening and closing assembly 5 includes two sleeves 51 symmetrically constructed on opposite sides of the height limiting sections 21. The two sleeves 51 are located on the corresponding height limiting sections 21 and are staggered. Semicircular sleeves 52 are provided on opposite sides of the two sleeves 51. A pivot pin 6 is provided between the two sleeves 51. The pivot pin 6 is used to connect the semicircular sleeves 52 on the two height limiting sections 21 to form a ring 53.
[0052] Through the cooperation of the pivot pin 6 and the ring 53, the two height-limiting sections 21 are rigidly connected as a whole under normal conditions, which can withstand the vertical interception force. When subjected to a strong horizontal impact from an extremely tall vehicle, the pivot pin 6 acts as a pivot point, allowing the two height-limiting sections 21 to rotate or flip relative to each other around the center of the ring 53. This makes the height-limiting beam 2 move smoothly and with minimal resistance when disconnected (i.e., rotated to avoid), ensuring that the device can quickly flip open to both sides under extreme conditions to achieve flexible avoidance and effectively protect the safety of the height-limiting beam 2 and the vehicle.
[0053] The pivot pin 6 adopts electromechanical-hydraulic (or electromechanical spring) coordinated control to realize the intelligent switching between rigid locking and flexible unlocking between the height restriction sections 21. The pivot pin 6 includes a pivot shaft 61 rotatably set inside the sleeve 51. The pivot shaft 61 serves as the rotation center of the entire hinge structure, allowing the height restriction section 21 to deflect at an angle under specific conditions. One end of the pivot shaft 61 is rotatably set with a semi-circular pin 62 located inside the corresponding semi-circular sleeve 52. The two semi-circular pins 62 are spliced together inside the ring sleeve 53 to form a complete circular pin 63. The circular pin 63 structure acts as a rigid connecting pin under normal conditions, tightly locking the two height restriction beams 2 to ensure that they have sufficient shear resistance when intercepting vehicles.
[0054] To achieve controllable locking and unlocking, an annular groove 64 is provided on the rotating shaft 61 within the sleeve 51, and a stop block 65 is provided on the sleeve 51 within the annular groove 64; a pin block 66 is provided within the annular groove 64, and a limiting spring 67 is provided between the pin block 66 and the stop block 65 within the annular groove 64; in the initial or reset state, the elastic force of the limiting spring 67 will push the pin block 66, so that the semi-circular pin 62 on the rotating shaft 6 is in a natural unlocked or disengaged state.
[0055] When the device enters the working state (i.e., ready to intercept vehicles), the external limiting mechanism (such as an electric push rod or hydraulic cylinder) will actively push the rotating shaft 61 to rotate 180 degrees. This rotation forces the two semi-circular pins 62 to rotate relative to each other and fit together within the ring 53, thereby forming a complete circular pin 63, completing the rigid locking of the two height-limiting beams 2. At this time, the device is in standby state and can normally perform the height-limiting interception task.
[0056] To ensure safe passage, the system integrates a height detection sensor. When the sensor detects that the vehicle's height exceeds a critical set value, the control system immediately issues a command to drive the limiting mechanism to release the rotational constraint on the rotating shaft 61 (i.e., unlock the limiting mechanism). Once the constraint is released, the compressed limiting spring 67 instantly releases its stored elastic potential energy, forcefully pushing the pin block 66 to move within the annular groove 64, causing the rotating shaft 61 to rotate, and causing the assembled circular pin 63 to quickly separate (unlock). At this time, the two height-limiting beams 2 lose their rigid connection and can flip open to the sides to avoid impact from the vehicle, thus avoiding damage to equipment and vehicles caused by hard collisions, achieving intelligent active protection based on height perception.
[0057] When the pivot pin 6 is in the locked state, it rotates and assembles: the external limiting mechanism pushes the pivot 61 to rotate 180 degrees, overcoming the preload of the limiting spring 67; this rotational action drives the semicircular pin 62 at the end of the pivot 61 to rotate in the semicircular sleeve 52, so that it is spatially aligned and assembled with the semicircular pin 62 on the other side.
[0058] The two semicircular pins 62 fit together tightly to form a complete solid pin shaft with a circular cross-section (i.e., round pin 63). At this time, the pivot pin 6 spans the connection between the two height-limiting sections 21, forming a rigid connection.
[0059] In this state, the pivot pin 6 can withstand huge shear forces; when a vehicle hits the height restriction beam 2, the impact force is evenly transmitted to the sliding sleeves 44 and the column 1 on both sides, and the height restriction beam 2 remains as a whole without bending or separating, ensuring the accuracy of the height restriction function.
[0060] In the unlocked state, when the sensor detects that the vehicle is too high or has been subjected to an abnormally large impact, the pivot pin 6 enters the unlocked state. The external limiting mechanism releases the rotational constraint on the pivot shaft 61, releasing the pivot shaft 61. The limiting spring 67, which has been in a compressed and stored state, releases its energy instantaneously, pushing the pin block 66 to slide within the annular groove 64. The movement of the pin block 66 causes the pivot shaft 61 to rotate in the opposite direction (reset rotation).
[0061] As the pivot 61 rotates, the two semicircular pins 62 that were originally joined together become misaligned and separate. The semicircular pins 62 retract into their respective semicircular sleeves 52, and the originally complete circular pin 63 structure disintegrates. The rigid connection between the two height-limiting beams 2 is severed. At this point, the height-limiting beams 2 lose their lateral support and transform into a movable flexible structure. Under the impact of a vehicle, the two height-limiting beams 2 can be flipped or rotated outward around the center of the pivot 61, thereby avoiding the top of the vehicle and achieving undamaged passage.
[0062] A rotating ring 68 is rotatably mounted on the sliding sleeve 44. A return spring 45 is located between the rotating ring 68 and the limiting seat 42. The rotating ring 68 and the sliding sleeve 44 can rotate relative to each other. The rotating ring 68 can rotate freely around the axis of the lead screw 43 without causing the sliding sleeve 44 to rotate synchronously. The return spring 45 is no longer directly pressed against the sliding sleeve 44, but is located between the rotating ring 68 and the upper limiting seat 42. The upper end of the spring abuts against the lower surface of the limiting seat 42, and the lower end abuts against the upper surface of the rotating ring 68.
[0063] When the lead screw 43 rotates, the sliding sleeve 44 is restricted from rotating by the guide structure, and its rotational motion is converted into the linear lifting motion of the sliding sleeve 44. During this process, if there is a frictional torque between the sliding sleeve 44 and the lead screw 43, or if there is an external lateral force attempting to impede the movement of the sliding sleeve 44, the swivel ring 68 plays a crucial isolating role. The swivel ring 68 can absorb these torsional forces attempting to be transmitted to the spring, ensuring that the return spring 45 only bears axial compressive force and does not twist or become entangled due to the jamming or slight rotation of the sliding sleeve 44.
[0064] The implementation principle of this invention is as follows: Step 1: In normal interception mode, the device is stationary and ready to intercept or allow compliant vehicles to pass.
[0065] 1. Initial positioning: The height limiting beam 2 spans between the two columns 1 and is at the preset initial interception height (lower limit height). Under the elastic force of the return spring 45, the sliding sleeve 44 is tightly fitted to the lower end of the lead screw 43 to ensure that the height limiting beam 2 is stable and resists slight external vibration interference.
[0066] 2. Rigid locking: When the opening and closing assembly 5 is in the locked state, the external limiting mechanism pushes the rotating shaft 61 to rotate 180 degrees, overcoming the preload of the limiting spring 67, so that the two semi-circular pins 62 are joined together in the ring sleeve 53 to form a complete circular pin 63, which rigidly connects the two height limiting sections 21 into a whole, with sufficient shear resistance.
[0067] 3. Ready to go: The angled side 33 of the lifting frame 31 faces the direction of the vehicle's approach, the roller 35 is in the initial position of the guide groove 34, the entire structure is stationary, and ready to respond to the vehicle's request to pass at any time.
[0068] Step 2: Standard Over-Height Avoidance Mode When the vehicle height exceeds the initial interception height but does not exceed the mechanical lifting limit, the device automatically raises to avoid the obstacle through the mechanical structure.
[0069] 1. Contact force: The top of the vehicle contacts the inclined edge 33 of the lifting frame 31 and contacts the roller 35 in the guide groove 34; the horizontal kinetic energy of the vehicle is converted into a vertical component force.
[0070] 2. Lifting process: Roller 35 rolls upward along inclined guide groove 34, driving lifting frame 31 and height limiting beam 2 to rise vertically along column 1. During this process, sliding sleeve 44 slides upward along lead screw 43, compressing return spring 45; roller 35 on protruding section 36 converts the sliding friction between the roof and beam into rolling friction, protecting the paint surface of the vehicle body.
[0071] 3. Limit protection: When the height limit beam 2 rises to the preset safe upper limit height, the sliding guide 41 or the limit seat 42 in the connector 4 abuts against the mechanical limit structure on the column 1, forcibly terminating the upward movement and ensuring that the passing height is within the safe range.
[0072] 4. Automatic reset: After the vehicle passes, the horizontal thrust disappears; the reset spring 45 releases its elastic potential energy, pushing the sliding sleeve 44 to slide down along the lead screw 43, causing the height restriction beam 2 to quickly reset to the initial interception height and restore the height restriction function.
[0073] Step 3: Extreme Ultra-High Intelligent Activation Mode When the vehicle height exceeds the mechanical lifting limit and directly impacts the main body of the height restriction beam 2, the device unlocks through intelligent control to achieve flexible avoidance.
[0074] 1. Height detection: The system-integrated height detection sensor monitors the vehicle's height in real time; when the vehicle height exceeds the preset threshold (i.e., the height at which the lifting mechanism 3 fails), an intelligent unlocking command is triggered.
[0075] 2. Unlocking action: The control system drives the external limit mechanism to release the rotational constraint on the rotating shaft 61; the limit spring 67, which has been in a compressed and stored state, releases energy instantly, pushing the pin 66 to move in the annular groove 64, causing the rotating shaft 61 to rotate in the opposite direction.
[0076] 3. Structural separation: The rotation of the shaft 61 causes the assembled circular pin 63 to quickly separate into two semi-circular pins 62, and the rigid connection between the two height-limiting sections 21 is cut off.
[0077] 4. Flexible avoidance: Under the impact of the vehicle, the two height restriction sections 21 use the pivot pin 6 as the fulcrum to flip or rotate to the sides to avoid the impact, thus avoiding damage to the equipment and vehicles caused by rigid collision. After the vehicle passes, the system can re-instruct the limiting mechanism to push the pivot pin 61 to rotate, so that the semi-circular pin 62 can be reassembled and the integrity of the height restriction beam 2 can be restored.
[0078] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.
Claims
1. An intelligent sensor-type height limit bar adjustment device, comprising symmetrically arranged columns (1), characterized in that: A height-limiting beam (2) is provided between the two columns (1), and the height-limiting beam (2) is slidably connected to the columns (1). A lifting mechanism (3) is provided on the height-limiting beam (2), and the lifting mechanism (3) is used to convert the horizontal force into a vertical lifting force. The lifting mechanism (3) includes multiple lifting frames (31) installed on the height-limiting beam (2). The lifting frame (31) is triangular and consists of two right-angled sides (32) and one oblique side (33). The oblique side (33) faces the direction in which the vehicle is coming. A guide groove (34) is provided on the oblique side (33), and several rollers (35) are rotatably arranged in the guide groove (34).
2. The intelligent sensor-type height limit bar adjustment device according to claim 1, characterized in that: One end of the beveled side (33) extends into a protruding section (36), which is located at the lower end of the height-limiting beam (2), and the guide groove (34) extends into the protruding section (36); The roller (35) extends into the guide groove (34) of the protruding section (36).
3. The intelligent sensor-type height limit bar adjustment device according to claim 2, characterized in that: Both sides of the height limiting beam (2) are provided with connectors (4), which connect the height limiting beam (2) to the column (1) to limit the lifting height of the height limiting beam (2); The connector (4) includes a sliding guide (41) that is slidably disposed on the column (1). The sliding guide (41) slides along the column (1). Limit seats (42) are provided at both ends of the sliding guide (41), and a screw rod (43) is provided between the two limit seats (42). A sliding sleeve (44) connected to the height limiting beam (2) is slidably provided on the lead screw (43).
4. The intelligent sensor-type height limit bar adjustment device according to claim 3, characterized in that: A reset spring (45) is provided between the upper end of the sliding sleeve (44) and the limiting seat (42). The reset spring (45) pushes the sliding sleeve (44) to the lower end of the lead screw (43).
5. The intelligent sensor-type height limit bar adjustment device according to claim 4, characterized in that: The height limiting beam (2) includes two symmetrically arranged height limiting sections (21), and the sliding sleeve (44) is rotatably connected to the lead screw (43). An opening and closing assembly (5) is provided between the two height limiting sections (21), and the opening and closing assembly (5) is used to connect and disconnect the two height limiting sections (21). The opening and closing component (5) includes two symmetrically constructed sleeves (51) on opposite sides of two height-limiting sections (21). The two sleeves (51) are located on the corresponding height-limiting sections (21) and are staggered. A semicircular sleeve (52) is provided on the opposite side of the two sleeves (51), and a pivot pin (6) is provided between the two sleeves (51). The pivot pin (6) is used to connect the semicircular sleeves (52) on the two height-limiting sections (21) to form a ring (53).
6. The intelligent sensor-type height limit bar adjustment device according to claim 2, characterized in that: The pivot pin (6) includes a pivot shaft (61) rotatably disposed inside the sleeve (51), and a semi-circular pin (62) rotatably disposed at one end of the pivot shaft (61) inside the corresponding semi-circular sleeve (52). The two semi-circular pins (62) are connected inside the ring sleeve (53) to form a round pin (63).
7. The intelligent sensor-type height limit bar adjustment device according to claim 1, characterized in that: The rotating shaft (61) has an annular groove (64) located in the sleeve (51), and the sleeve (51) has a stop block (65) located in the annular groove (64). A pin (66) is provided in the annular groove (64), and a limiting spring (67) located in the annular groove (64) is provided between the pin (66) and the stop block (65).
8. The intelligent sensor-type height limit bar adjustment device according to claim 7, characterized in that: A rotating ring (68) is rotatably mounted on the sliding sleeve (44), and a return spring (45) is located between the rotating ring (68) and the limit seat (42).