Municipal bridge height limiting device

Abstract

The utility model relates to the technical field of municipal bridges, and discloses a municipal bridge height limiting device which comprises a supporting plate, supporting columns are installed at the left end and the right end of the lower surface of the supporting plate, a clamping seat is slidably connected to the surface of one side of each supporting column, and a threaded rod is rotatably connected to the lower surface of the interior of each clamping seat. Two clamping plates are in threaded connection with the position, located on the inner side of the clamping base, of the outer portion of the threaded rod, and a positioning gear is installed at the position, located above the clamping base, of the outer portion of the threaded rod; according to the height limiting device, the adjusting mechanism is arranged, the motor in the adjusting mechanism drives the adjusting rod to rotate, and the adjusting rope can be retracted or released, so that the height of the height limiting rod is adjusted, and different height limiting requirements are met; and a positioning block in the positioning mechanism clamps a positioning gear, so that a threaded rod cannot rotate when not needing to rotate, and the phenomenon that the threaded rod rotates due to factors such as external vibration, and consequently fixation of the height limiting rod is loosened is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of municipal bridges, in particular to a height limit device for municipal bridges. Background Technique

[0002] When building a municipal bridge, it is necessary to build a height limit device at the positions of the entrances and exits at both ends of the bridge to facilitate the protection of the bridge; the existing height limit devices have relatively single performance, often adopt a fixed structure, cannot adjust the height limit according to actual usage requirements, and have low practicability. Moreover, after the height limit rod is damaged by a vehicle, it is difficult to repair or replace the height limit rod in time, and then the height limit cannot be imposed on other passing vehicles.

[0003] The Chinese patent discloses a height limit device for a municipal road bridge (authorization publication number CN220225035U). When starting the first motor, the driving gear fixedly connected to the output end of the first motor rotates, so that the driven gear meshed with the driving gear through a gear belt rotates. Furthermore, the threaded rods fixedly connected to the driving gear and the driven gear respectively rotate, so that the threaded blocks respectively threadedly connected to the two threaded rods move up and down along the threaded rods. Thus, the vertical plates fixedly connected to the threaded blocks move up and down, and then drive the height limit rod to move up and down, which has the advantage of being convenient for adjusting the height; rotating the fixed wheel, so that the bidirectional screw fixedly connected to the fixed wheel rotates. Furthermore, the two wire blocks threadedly connected to the bidirectional screw move towards the center of the bidirectional screw. Then, the clamping plates fixedly connected to the two wire blocks approach each other relatively, so that they fit with the height limit rod and fix it. Reversing the fixed wheel can separate it for disassembly, so that the height limit rod can be quickly replaced;

[0004] However, it has certain drawbacks: it fixes the height limit rod by rotating the bidirectional screw, but the bidirectional screw is easily affected by environmental vibrations. The vibrations during vehicle driving will be transmitted to the bidirectional screw. Over time, the bidirectional screw will rotate due to vibrations, resulting in the clamping plates being unable to clamp the height limit rod, thus causing the height limit rod to become loose or even fall off. Content of the Utility Model

[0005] The purpose of the utility model is to provide a height limit device for a municipal bridge to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A height limit device for a municipal bridge, including a support plate. At both left and right ends of the upper surface of the support plate, adjusting mechanisms are provided. At both left and right ends of the lower surface of the support plate, support columns are installed. On one side surface of the support column, a clamping seat is slidably connected. At the lower surface inside the clamping seat, a threaded rod is rotatably connected. On the outer part of the threaded rod inside the clamping seat, two clamping plates are threadedly connected. Between the upper and lower two clamping plates on both left and right sides, a height limit rod is commonly installed. Above the clamping seat on the outer part of the threaded rod, a positioning gear is installed. On the upper surface of the clamping seat in front of the threaded rod, a fixed seat is installed. At the front end of the fixed seat, a fixing plate is installed, and a positioning mechanism is provided between the fixed seat and the fixing plate.

[0008] As a further scheme of the present utility model: The adjusting mechanism includes an adjusting seat. Inside the adjusting seat, a motor is installed. At the output end of the motor, an adjusting rod is installed. An adjusting rope is wound around the outer part of the adjusting rod.

[0009] As a further scheme of the present utility model: The positioning mechanism includes a sliding plate. At the rear surface of the sliding plate, a positioning rod is installed. At the rear end of the positioning rod, a positioning block is installed. At the four corners of the front surface of the sliding plate, springs are installed, and at the center position of the front surface of the sliding plate, a pull rod is installed.

[0010] As a further scheme of the present utility model: The threaded rod movably penetrates through the upper surface of the clamping seat. One end of the clamping plate is slidably connected to one side surface inside the clamping seat.

[0011] As a further scheme of the present utility model: The lower end of the adjusting seat is installed on the upper surface of the support plate. The adjusting rope movably penetrates through the lower surface of the adjusting seat and the support plate, and one end of the adjusting rope is connected to the upper surface of the clamping seat.

[0012] As a further scheme of the present utility model: The sliding plate is slidably connected inside the fixed seat. The positioning rod movably penetrates through the rear surface of the fixed seat. The front end of the spring is connected to the fixing plate. The pull rod movably penetrates through the fixing plate.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] 1. By setting an adjusting mechanism in the present utility model, the motor in the adjusting mechanism drives the adjusting rod to rotate, which can take in or release the adjusting rope, thereby adjusting the height of the height limit rod to meet different height limit requirements.

[0015] 2. By using the positioning block in the positioning mechanism to block the positioning gear in the present utility model, the threaded rod cannot rotate when it is not needed, avoiding the threaded rod from rotating due to external vibrations and other factors, resulting in the loosening of the fixation of the height limit rod. Description of the Drawings

[0016] Figure 1 It is a structural schematic diagram of a height limit device for municipal bridges;

[0017] Figure 2 It is a cross-sectional view of the adjusting mechanism in a height limit device for municipal bridges;

[0018] Figure 3 It is Figure 1 an enlarged view of A in

[0019] Figure 4 It is Figure 3 a partial schematic diagram of

[0020] In the figure: 1, support plate; 2, adjusting mechanism; 3, adjusting seat; 4, motor; 5, adjusting rod; 6, adjusting rope; 7, support column; 8, clamping seat; 9, threaded rod; 10, clamping plate; 11, height limit rod; 12, positioning gear; 13, fixed seat; 14, fixing plate; 15, positioning mechanism; 16, sliding plate; 17, positioning rod; 18, positioning block; 19, spring; 20, pull rod. Specific embodiments

[0021] Please refer to Figures 1 to 3 , in the embodiment of the present utility model, a height limit device for municipal bridges includes a support plate 1. Adjusting mechanisms 2 are arranged at both the left and right ends of the upper surface of the support plate 1. The adjusting mechanism 2 includes an adjusting seat 3. The lower end of the adjusting seat 3 is installed on the upper surface of the support plate 1. A motor 4 is installed inside the adjusting seat 3. The output end of the motor 4 is installed with an adjusting rod 5. An adjusting rope 6 is wound around the outside of the adjusting rod 5. Support columns 7 are installed at both the left and right ends of the lower surface of the support plate 1. A clamping seat 8 is slidably connected to one side surface of the support column 7. The adjusting rope 6 movably penetrates the lower surface of the adjusting seat 3 and the support plate 1, and one end of the adjusting rope 6 is connected to the upper surface of the clamping seat 8. A threaded rod 9 is rotatably connected to the lower surface inside the clamping seat 8. The threaded rod 9 movably penetrates the upper surface of the clamping seat 8. Two clamping plates 10 are threadedly connected to the outside of the threaded rod 9 inside the clamping seat 8. One end of the clamping plate 10 is slidably connected to one side surface inside the clamping seat 8. A height limit rod 11 is jointly installed between the upper and lower two clamping plates 10 on both the left and right sides;

[0022] The whole device is installed on a municipal bridge for height limit;

[0023] The motor 4 is connected to a forward and reverse circuit, and the motor 4 has self-locking, that is, its motor shaft cannot rotate after power-off;

[0024] When the adjusting rope 6 is retracted and released, it can drive the clamping seat 8 to rise and fall, so as to adjust the height of the height limit rod 11;

[0025] A signboard is installed on the front surface of the height limit rod 11, and the signboard is detachable;

[0026] Rotate the threaded rod 9, and the two clamping plates 10 can move towards the middle simultaneously or move towards both sides respectively. Moving towards the middle will fix the height-limiting rod 11.

[0027] In Figure 3 and Figure 4 : A positioning gear 12 is installed above the clamping seat 8 on the outside of the threaded rod 9. A fixed seat 13 is installed in front of the threaded rod 9 on the upper surface of the clamping seat 8. A fixing plate 14 is installed at the front end of the fixed seat 13, and a positioning mechanism 15 is arranged between the fixed seat 13 and the fixing plate 14. The positioning mechanism 15 includes a sliding plate 16. The sliding plate 16 is slidably connected inside the fixed seat 13. A positioning rod 17 is installed on the rear surface of the sliding plate 16. The positioning rod 17 movably penetrates the rear surface of the fixed seat 13. A positioning block 18 is installed at the rear end of the positioning rod 17. Springs 19 are installed at the four corners of the front surface of the sliding plate 16. The front ends of the springs 19 are connected to the fixing plate 14. A pull rod 20 is installed at the center position of the front surface of the sliding plate 16. The pull rod 20 movably penetrates the fixing plate 14;

[0028] The positioning block 18 is located between two adjacent teeth of the positioning gear 12, which can prevent the threaded rod 9 from rotating when it does not need to rotate, and ensure the stability of clamping the height-limiting rod 11;

[0029] Pull the pull rod 20 towards the front side to drive the positioning block 18 away from the positioning gear 12, which is convenient for rotating the threaded rod 9.

[0030] The working principle of the present utility model is as follows: First, install the device at the municipal road bridge. When it is necessary to adjust the height limit, the staff can start the motor 4 to drive the adjusting rod 5 to rotate, release the adjusting rope 6 to drive the height-limiting rod 11 to lower to the lowest position, replace the signboard, and then start the motor 4 to drive the adjusting rod 5 to rotate and retract the adjusting rope 6, thereby raising the height-limiting rod 11 to the required height. When the height-limiting rod 11 is damaged and needs to be replaced, the staff can pull the pull rod 20 in the direction away from the positioning gear 12 to drive the positioning block 18 away from the positioning gear 12, and then rotate the threaded rod 9 to drive the upper and lower clamping plates 10 away from the height-limiting rod 11, so that the height-limiting rod 11 can be disassembled and replaced.

[0031] The above is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent replacements or changes, and should be covered within the protection scope of the present utility model.

Claims

1. A height limit device for a municipal bridge, comprising a support plate (1). Adjusting mechanisms (2) are arranged at both the left and right ends of the upper surface of the support plate (1). Support columns (7) are installed at both the left and right ends of the lower surface of the support plate (1). A clamping seat (8) is slidably connected to one side surface of the support column (7). A threaded rod (9) is rotatably connected to the lower surface inside the clamping seat (8). Two clamping plates (10) are threadedly connected to the outside of the threaded rod (9) inside the clamping seat (8). A height limit rod (11) is commonly installed between the upper and lower two clamping plates (10) on both the left and right sides. It is characterized in that, A positioning gear (12) is installed above the clamping seat (8) on the outside of the threaded rod (9). A fixed seat (13) is installed in front of the threaded rod (9) on the upper surface of the clamping seat (8). A fixing plate (14) is installed at the front end of the fixed seat (13), and a positioning mechanism (15) is arranged between the fixed seat (13) and the fixing plate (14).

2. The height limit device for a municipal bridge according to claim 1, characterized in that, The adjusting mechanism (2) includes an adjusting seat (3). A motor (4) is installed inside the adjusting seat (3). An adjusting rod (5) is installed at the output end of the motor (4). An adjusting rope (6) is wound around the outside of the adjusting rod (5).

3. The height limit device for municipal bridges according to claim 1, characterized in that, The positioning mechanism (15) includes a sliding plate (16). A positioning rod (17) is installed on the rear surface of the sliding plate (16). A positioning block (18) is installed at the rear end of the positioning rod (17). Springs (19) are installed at the four corners of the front surface of the sliding plate (16), and a pull rod (20) is installed at the center position of the front surface of the sliding plate (16).

4. A height limit device for a municipal bridge according to claim 1, characterized in that, The threaded rod (9) movably penetrates the upper surface of the clamping seat (8). One end of the clamping plate (10) is slidably connected to the inner side surface of the clamping seat (8).

5. The height limit device for municipal bridges according to claim 2, wherein, The lower end of the adjusting seat (3) is installed on the upper surface of the support plate (1). The adjusting rope (6) movably penetrates the lower surface of the adjusting seat (3) and the support plate (1), and one end of the adjusting rope (6) is connected to the upper surface of the clamping seat (8).

6. The height limit device for a municipal bridge according to claim 3, characterized in that, The sliding plate (16) is slidably connected inside the fixed seat (13). The positioning rod (17) movably penetrates the rear surface of the fixed seat (13). The front ends of the springs (19) are connected to the fixing plate (14). The pull rod (20) movably penetrates the fixing plate (14).

Images