A height restriction device for bridges on municipal highways

Abstract

This utility model discloses a bridge height restriction device for municipal highways, belonging to the field of municipal highway technology. It includes two support frames, with a common top frame fixedly connected to the top of each support frame. A height restriction bar is installed below the top frame, and adjustable limiting components are installed on both sides of the height restriction bar. Each adjustable limiting component includes a rectangular box and a connecting block slidably connected inside the support frame. A replacement component is installed inside the connecting block. In this utility model, when the height of an external vehicle exceeds the height of the height restriction bar, the force of the external vehicle will directly impact the height restriction bar. This force will be transmitted to a breakable block connected to the height restriction bar, causing the breakable block to disconnect from the height restriction bar. This reduces the impact deformation of the height restriction bar on the support frames on both sides, and reduces the impact of external vehicle impact on the overall performance of the device. Only the breakable block and the height restriction bar need to be replaced to ensure the portability of the device during use.

Description

Technical Field

[0001] This utility model belongs to the field of municipal highway technology, and in particular relates to a bridge height restriction device for municipal highways. Background Technology

[0002] A bridge is a structure erected to facilitate the passage of vehicles and pedestrians by allowing roads to cross natural or man-made obstacles or to meet other traffic needs. In road sections with bridges, height restriction devices are needed to limit the passage of excessively tall vehicles in order to protect the road and the bridge.

[0003] For example, Chinese patent document (CN108797428A) describes a height restriction device for municipal bridges, which includes two sets of support platforms. A support frame is provided on the upper side of each support platform. Two sets of rectangular sliding grooves are symmetrically distributed on both sides of the support frame. A sliding shaft is located in the middle of each rectangular sliding groove, and an I-shaped slider is located in the middle of each sliding shaft. Two sets of set bolts are symmetrically distributed on the side of the sliding shaft near the I-shaped slider. A sliding plate connects the I-shaped sliders. The height restriction can be adjusted according to actual usage needs by moving the I-shaped sliders up and down along the axis of the sliding shaft and tightening them with the set bolts. It is highly practical. The annular fluorescent sticker and fluorescent strip facilitate driver observation of the height restriction device. An infrared sensor combined with indicator lights provides early warnings for vehicles exceeding the height limit. However, during use, when a vehicle exceeds the height limit bar, the impact force of the vehicle will cause deformation of the height limit bar, which will be transmitted to the mounting frames on both sides, thus affecting the overall effectiveness of the device. Therefore, improvements are needed. Utility Model Content

[0004] The purpose of this utility model is to solve the problem that when a vehicle exceeds the height limit bar during use, the impact force of the vehicle during the driving process will cause the height limit bar to deform, and the deformation will be transmitted to the mounting brackets on both sides, thus affecting the overall use effect of the device. Therefore, a height limit device for bridges on municipal highways is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A height restriction device for bridges on municipal highways includes two support frames, with the same top frame fixedly connected to the top of the two support frames. A height restriction bar is installed below the top frame, and an adjustment limiting component is installed on both sides of the height restriction bar. The adjustment limiting component includes a rectangular box and a connecting block that are slidably connected inside the support frame. A replacement component is installed inside the connecting block.

[0007] The replacement component includes a cavity located at the center of the connecting block. A plurality of springs are provided on one side of the cavity, and a sliding plate is fixedly connected to the other side of the springs. Two locking blocks are fixedly connected to the other side of the sliding plate. The other end of the locking blocks extends to the outside of the connecting block and is provided with a breakable block. The other side of the breakable block is fixedly connected to the outer wall of the height limit bar.

[0008] As a further description of the above technical solution:

[0009] The connecting block has a circular through hole on the side opposite to the easily broken block. The sliding plate is slidably connected inside the connecting block, and the locking block is slidably connected inside the circular through hole.

[0010] As a further description of the above technical solution:

[0011] Rectangular grooves are provided on both sides of the cavity, the cross-sectional shape of the easily broken block is concave, and the easily broken block is slidably connected inside the connecting block, the cross-sectional shape of the connecting block is L-shaped.

[0012] As a further description of the above technical solution:

[0013] A hydraulic cylinder is fixedly connected to the center of the bottom of the rectangular box. The bottom of the hydraulic cylinder is fixedly connected to the inner wall of the support frame. Multiple rectangular blocks are linearly arrayed on both sides of the rectangular box. The side of the rectangular block away from the rectangular box is fixedly connected to the inner wall of the support frame.

[0014] As a further description of the above technical solution:

[0015] A drive motor is fixedly connected to the center of the rectangular box. A rotating shaft is fixedly connected to one end of the output shaft of the drive motor. A gear is fixedly connected to the outer periphery of the rotating shaft. Racks are meshed on both sides of the gear, and the two racks are symmetrically arranged along the rotating shaft.

[0016] As a further description of the above technical solution:

[0017] The rack is fixedly connected to a limiting block on the side away from the gear, and the other side of the limiting block extends to the outside of the rectangular box. The limiting block is slidably connected inside the rectangular box, and one side of the rectangular box is fixedly connected to the outer wall of the connecting block.

[0018] As a further description of the above technical solution:

[0019] A buffer layer is provided at the center of the bottom of the height restriction pole, and a fixed frame is fixedly connected to the bottom of the support frame. Rectangular through holes are opened on the top side of the two support frames opposite each other.

[0020] As a further description of the above technical solution:

[0021] The connecting block is slidably connected inside the rectangular through hole. Both sides of the connecting block are fixedly connected to a shrinkage protective layer, and the other side of the shrinkage protective layer is fixedly connected to the inner wall of the support frame.

[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0023] 1. In this utility model, by setting a replacement component, when the height of an external vehicle is greater than the height of the height limit bar, the force of the external vehicle will directly impact the height limit bar, and the force will be transmitted to the breakable block connected to the height limit bar, causing the breakable block to break away from the height limit bar. This reduces the impact deformation of the height limit bar on the support frames on both sides, and reduces the impact of external vehicle impact on the overall performance of the device. Only the breakable block and the height limit bar need to be replaced to ensure the portability of the device during use.

[0024] 2. In this utility model, the adjustable limiting component is set up, and the hydraulic cylinder drives the rectangular box, connecting block, easily broken block, height limiting rod and buffer layer to adjust the height. Then, the drive motor drives the rotating shaft and gear to rotate, and the rack drives the limiting block to move away from the outside of the rectangular box, so that the limiting block is between two opposite rectangular blocks. The limiting block and the rectangular blocks support the adjusted rectangular box and height limiting rod, ensuring its stability after adjustment. Moreover, when it is necessary to adjust its height, the relative position between the limiting block and the rectangular block must be adjusted first, reducing the impact of external misoperation on the adjustment of the height limiting rod. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the overall three-dimensional structure of the adjusting and limiting component in this utility model;

[0027] Figure 3 In this utility model Figure 2 A magnified schematic diagram of the structure at point A;

[0028] Figure 4 This is a schematic diagram of the internal three-dimensional structure of the rectangular box in this utility model;

[0029] Figure 5 This is a partial three-dimensional structural diagram of the adjusting limit component and the replacement component in this utility model.

[0030] Legend:

[0031] 1. Support frame; 2. Fixing frame; 3. Top frame; 4. Height limit bar; 5. Adjustable limit assembly; 501. Hydraulic cylinder; 502. Rectangular box; 503. Rectangular block; 504. Drive motor; 505. Rotating shaft; 506. Gear; 507. Rack; 508. Limiting block; 509. Connecting block; 510. Shrinkable protective layer; 6. Replacement assembly; 601. Cavity; 602. Spring; 603. Sliding plate; 604. Locking block; 605. Fragile block; 7. Buffer layer. 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0033] Please see Figures 1-5 This utility model provides a technical solution: a bridge height restriction device for municipal highways, including two support frames 1, the top of the two support frames 1 is fixedly connected to the same top frame 3, a height restriction bar 4 is set below the top frame 3, and an adjustment limit component 5 is set on both sides of the height restriction bar 4. The adjustment limit component 5 includes a rectangular box 502 and a connecting block 509 slidably connected inside the support frame 1, and a replacement component 6 is set inside the connecting block 509.

[0034] The replacement component 6 includes a cavity 601 located at the center of the connecting block 509. Multiple springs 602 are located on one side of the cavity 601. A sliding plate 603 is fixedly connected to the other side of the springs 602. Two locking blocks 604 are fixedly connected to the other side of the sliding plate 603. The other end of each locking block 604 extends to the outside of the connecting block 509 and is equipped with a breakable block 605. The other side of the breakable block 605 is fixedly connected to the outer wall of the height-limiting rod 4. A circular through hole is provided on the side of the connecting block 509 opposite to the breakable block 605. The sliding plate 603 is slidably connected inside the connecting block 509, and the locking block 604 is slidably connected inside the circular through hole. Rectangular grooves are provided on both sides of the cavity 601. The cross-sectional shape of the breakable block 605 is concave, and the breakable block 605 is slidably connected inside the connecting block 509. The cross-sectional shape of the connecting block 509 is L-shaped.

[0035] Detailed Implementation: First, fix the fixing frame 2 at a suitable distance from the external bridge. Then, fix the support frame 1 onto the fixing frame 2. Activate the hydraulic cylinder 501 as needed. The hydraulic cylinder 501 adjusts the height of the rectangular box 502, connecting block 509, breakable block 605, height limit bar 4, and buffer layer 7 to meet different height restriction requirements. The buffer layer 7 adjusts the force between the vehicle and the height limit bar 4. When the height of the external vehicle is greater than the height of the height limit bar 4, the force of the external vehicle will directly impact the height limit bar 4, causing the height limit bar 4 to move with the force of the external vehicle. When the device moves, its force is transmitted to the breakable block 605 connected to the height limit bar 4, causing the breakable block 605 to disconnect from the height limit bar 4. This reduces the impact deformation of the height limit bar 4 on the support frames 1 on both sides and reduces the impact of external vehicle impacts on the overall performance of the device. Only the breakable block 605 and the height limit bar 4 need to be replaced to ensure the portability of the device during use. Reflective strips can be provided on both sides of the top frame 3 and the height limit bar 4 as needed. The material of the breakable block 605 can be selected according to actual needs. This technology is a known and disclosed technology that is easily understood by those skilled in the art, so it is not described in detail in this application.

[0036] A hydraulic cylinder 501 is fixedly connected to the center of the bottom of a rectangular box 502. The bottom of the hydraulic cylinder 501 is fixedly connected to the inner wall of the support frame 1. Multiple rectangular blocks 503 are linearly arrayed on both sides of the rectangular box 502. The side of the rectangular block 503 away from the rectangular box 502 is fixedly connected to the inner wall of the support frame 1. A drive motor 504 is fixedly connected to the center of the interior of the rectangular box 502. A rotating shaft 505 is fixedly connected to one end of the output shaft of the drive motor 504. A gear 506 is fixedly connected to the outer periphery of the rotating shaft 505. Racks 507 are meshed on both sides of the gear 506. The two racks 507 are symmetrically arranged along the rotating shaft 505. A limiting block 508 is fixedly connected to the side away from the gear 506. The other side of the limiting block 508 extends to the outside of the rectangular box 502, and the limiting block 508 is slidably connected inside the rectangular box 502. One side of the rectangular box 502 is fixedly connected to the outer wall of the connecting block 509. A buffer layer 7 is provided at the bottom center of the height limiting rod 4. A fixing frame 2 is fixedly connected to the bottom of the support frame 1. A rectangular through hole is opened on the top side of the two support frames 1. The connecting block 509 is slidably connected inside the rectangular through hole. A shrinkage protective layer 510 is fixedly connected to both sides of the connecting block 509. The other side of the shrinkage protective layer 510 is fixedly connected to the inner wall of the support frame 1.

[0037] Detailed Implementation: After the height limit bar 4 is adjusted, the drive motor 504 drives the rotating shaft 505 and gear 506 to rotate. Utilizing the linkage effect between gear 506 and two racks 507, power is transmitted to the two racks 507, causing the racks 507 to move the limiting block 508 away from the outer side of the rectangular box 502. The limiting block 508 is positioned between two opposing rectangular blocks 503. The limiting block 508 and rectangular blocks 503 support the adjusted rectangular box 502 and the height limit bar 4, ensuring their stability after adjustment. When the height needs to be adjusted, the relative positions of the limiting block 508 and rectangular blocks 503 must be adjusted first, reducing the impact of external misoperation on the adjustment of the height limit bar 4. The shrink protective layer 510 protects the rectangular through hole in the support frame 1, effectively reducing the impact of height limit bar 4 during adjustment and improving the smoothness of the internal adjustment unit after long-term use.

[0038] Working Principle: In use, first fix the fixing frame 2 at a suitable distance from the external bridge. Then, fix the support frame 1 onto the fixing frame 2. Activate the hydraulic cylinder 501 as needed. The hydraulic cylinder 501 drives the rectangular box 502, connecting block 509, breakable block 605, height limit bar 4, and buffer layer 7 to adjust their height. After adjusting the height limit bar 4, the drive motor 504 drives the rotating shaft 505 and gear 506 to rotate. Utilizing the linkage effect between the gear 506 and the two racks 507, power is transmitted to the two racks 507, causing them to move the limiting block 508 away from the outer side of the rectangular box 502. The limiting block 508 is positioned between two opposing rectangular blocks 503. The limiting block 508 and the rectangular blocks 503 support the adjusted rectangular box 502 and the height limit bar 4. When the height of an external vehicle is greater than the height of the height limit bar 4, the force of the external vehicle will directly impact the height limit bar 4, causing the height limit bar 4 to move with the force of the external vehicle. At the same time, the force will be transmitted to the breakable block 605 connected to the height limit bar 4, causing the breakable block 605 to disconnect from the height limit bar 4. This reduces the impact deformation of the height limit bar 4 on the support frames 1 on both sides. The shrinkable protective layer 510 protects the rectangular through holes opened in the support frame 1, making it convenient to use.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A bridge height limiter for municipal roads, comprising two support frames (1), characterized in that: The top of the two support frames (1) is fixedly connected to the same top frame (3). A height limit bar (4) is provided below the top frame (3). An adjustment limit component (5) is provided on both sides of the height limit bar (4). The adjustment limit component (5) includes a rectangular box (502) and a connecting block (509) that are slidably connected inside the support frame (1). A replacement component (6) is provided inside the connecting block (509). The replacement component (6) includes a cavity (601) located at the center of the connecting block (509). A plurality of springs (602) are provided on one side of the cavity (601). A sliding plate (603) is fixedly connected to the other side of the springs (602). Two locking blocks (604) are fixedly connected to the other side of the sliding plate (603). The other end of the locking block (604) extends to the outside of the connecting block (509) and is provided with a breakable block (605). The other side of the breakable block (605) is fixedly connected to the outer wall of the height limiting rod (4).

2. The bridge height limiting device for municipal highway according to claim 1, characterized in that: The connecting block (509) has a circular through hole on the side opposite to the easily broken block (605), the sliding plate (603) is slidably connected inside the connecting block (509), and the locking block (604) is slidably connected inside the circular through hole.

3. The bridge height limiting device for municipal highway according to claim 2, characterized in that: The cavity (601) is provided with rectangular sliding grooves on both sides. The cross-sectional shape of the breakable block (605) is concave, and the breakable block (605) is slidably connected inside the connecting block (509). The cross-sectional shape of the connecting block (509) is L-shaped.

4. The bridge height limiting device for municipal highway according to claim 3, characterized in that: A hydraulic cylinder (501) is fixedly connected to the center of the bottom of the rectangular box (502). The bottom of the hydraulic cylinder (501) is fixedly connected to the inner wall of the support frame (1). Multiple rectangular blocks (503) are linearly arrayed on both sides of the rectangular box (502). The side of the rectangular block (503) away from the rectangular box (502) is fixedly connected to the inner wall of the support frame (1).

5. The bridge height limiting device for municipal highway according to claim 4, characterized in that: A drive motor (504) is fixedly connected to the center of the rectangular box (502). A rotating shaft (505) is fixedly connected to one end of the output shaft of the drive motor (504). A gear (506) is fixedly connected to the outer periphery of the rotating shaft (505). A rack (507) is meshed on both sides of the gear (506). The two racks (507) are symmetrically arranged along the rotating shaft (505).

6. The bridge height limiting device for municipal highway according to claim 5, characterized in that: The rack (507) is fixedly connected to a limiting block (508) on the side away from the gear (506), and the other side of the limiting block (508) extends to the outside of the rectangular box (502), and the limiting block (508) is slidably connected inside the rectangular box (502). One side of the rectangular box (502) is fixedly connected to the outer wall of the connecting block (509).

7. The bridge height limiting device for municipal highway according to claim 6, characterized in that: A buffer layer (7) is provided at the bottom center of the height limit bar (4), and a fixed frame (2) is fixedly connected to the bottom of the support frame (1). Rectangular through holes are opened on the top side of the two support frames (1).

8. The bridge height limiting device for municipal highway according to claim 7, characterized in that: The connecting block (509) is slidably connected inside the rectangular through hole. Both sides of the connecting block (509) are fixedly connected with shrinkage protective layers (510), and the other side of the shrinkage protective layer (510) is fixedly connected to the inner wall of the support frame (1).

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