A visualizing bridge deformation monitoring device

Abstract

The utility model discloses a visual bridge deformation monitoring equipment, including bearing block, the fixed block of fixed connection in bearing block both sides, the support block of fixed connection in bearing block upper end, the fixed plate of fixed connection in support block upper end, the steel block of fixed connection in fixed plate upper end, a plurality of limit posts of fixed connection in steel block upper end, the transverse plate of fixed connection in fixed plate both sides, a plurality of springs of fixed connection in transverse plate upper end, the first movable block of fixed connection in spring upper end, the second movable block of fixed connection in first movable block upper end, the sleeve piece of setting in a plurality of limit post side wall, set up in the ranging mechanism of bearing block outside, the support of fixed connection in sleeve piece upper end and set up the clamping mechanism of support, the side wall of second movable block and the side wall of sleeve piece are mutually fixed. The utility model has the advantages of low cost, convenient installation, monitoring is intuitive, response is fast and the advantage of high reliability.

Description

Technical Field

[0001] This utility model relates to the field of engineering structure safety monitoring technology, specifically a visual bridge deformation monitoring device. Background Technology

[0002] As an important transportation infrastructure, the structural safety of bridges is of paramount importance. Under long-term use and external loads (such as vehicles, wind loads, earthquakes, etc.), bridges will undergo minute deformations and vibrations. Continuous and effective monitoring of these deformations is a key means to assess the health status of bridges and prevent safety accidents.

[0003] Currently, bridge deformation monitoring often relies on precision electronic sensors (such as fiber optic sensors, GNSS, etc.) or periodic manual measurements. While these methods offer high accuracy, they also have some limitations: precision electronic monitoring systems are expensive, complex to install and maintain, and unsuitable for large-scale or temporary monitoring points; manual measurements suffer from low efficiency, poor continuity, and the inability to capture instantaneous deformations (such as deformations caused by sudden vibrations) in real time; furthermore, existing technical solutions often fall short in terms of the intuitiveness and immediacy of monitoring results, making it difficult for on-site inspectors to quickly and directly obtain the real-time deformation status of the bridge.

[0004] Therefore, there is an urgent need for a monitoring device that is low-cost, easy to install, and can intuitively display bridge deformation, especially one that can quickly respond to dynamic deformations such as vibrations, in order to make up for the shortcomings of existing technologies. Utility Model Content

[0005] The purpose of this invention is to provide a visual bridge deformation monitoring device, which has the advantages of low cost, convenient installation, intuitive monitoring, fast response and high reliability, and solves the problems in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A visual bridge deformation monitoring device includes a bearing block, a fixed block fixed to both sides of the bearing block, a support block fixed to the upper end of the bearing block, a fixed plate fixed to the upper end of the support block, a steel block fixed to the upper end of the fixed plate, multiple limiting posts fixed to the upper end of the steel block, a horizontal plate fixed to both sides of the fixed plate, multiple springs fixed to the upper end of the horizontal plate, a first movable block fixed to the upper end of the spring, a second movable block fixed to the upper end of the first movable block, a sleeve block sleeved on the side wall of the multiple limiting posts and sliding along the limiting posts, a ranging mechanism disposed outside the bearing block, a bracket fixed to the upper end of the sleeve block, and a clamping mechanism disposed on the bracket. The sidewall of the second movable block and the sidewall of the sleeve block are fixedly connected to each other, and the sleeve block drives the second movable block to move synchronously. One of the first active blocks is equipped with a monitoring mechanism for displaying the amount of bridge deformation.

[0007] Preferably, the clamping mechanism includes a U-shaped block fixed to the side wall of the bracket and multiple bolts threaded through the bracket on both sides.

[0008] It is worth noting that the clamping mechanism has a simple structure and is easy to operate. It can be quickly inserted into the side wall of the bridge bearing (such as pot bearing or plate bearing) or the pre-embedded steel component through the U-shaped block, and is tightened and fixed by bolts on both sides, realizing a quick and firm connection between the equipment and the bridge structure. This design does not require complex drilling or welding on the bridge, and is easy to install and disassemble. It is suitable for temporary or permanent monitoring points, reduces installation costs and interference with the bridge structure, and ensures reliable synchronization between the monitoring benchmark and the bridge deformation.

[0009] Preferably, one end of the cylinder of the shock absorber is hinged to the upper end of the fixed block, the output end of the shock absorber is hinged to the lower end of the horizontal plate, and the shock absorber is set at an angle.

[0010] It is worth noting that the inclined shock absorbers constitute a highly efficient damping system. When the bridge experiences high-frequency, minor vibrations (such as when a vehicle passes by), the springs will reciprocate. The shock absorbers can quickly absorb and dissipate this kinetic energy, suppressing the continuous swaying of the springs and the upper moving blocks. This design effectively filters out interference vibrations caused by environmental noise, allowing the monitoring agency to mainly reflect the bridge structure's true and influential low-frequency deformation or displacement, greatly improving the stability of the monitoring signal.

[0011] Preferably, the monitoring mechanism includes a limiting groove extending through the upper end of one of the first movable blocks, a rack slidably disposed on the inner wall of the limiting groove, multiple first scale grooves formed on the side wall of the rack, a fixed seat fixedly connected to the side wall of the second movable block, a rotating rod rotatably mounted on the inner wall of the fixed seat, and a gear fixedly connected to one end of the rotating rod. One end of the gear has multiple second scale grooves, which are distributed in a circumferential shape, and the toothed grooves of the rack are adapted to the gear.

[0012] It is worth noting that when the deformation of the bridge causes the sleeve block to move the second movable block horizontally, the horizontal linear displacement is converted into the rotational motion of the gear through the meshing transmission of the gear and rack. This mechanical amplification effect magnifies the small linear displacement into a significant angular rotation. Without the aid of electronic equipment, the inspectors can intuitively and quickly qualitatively or semi-quantitatively determine the direction and magnitude of the deformation by observing the deflection angle of the second scale groove on the gear relative to the fixed reference point, or the sliding distance of the first scale groove on the rack.

[0013] Preferably, the ranging mechanism includes a support disposed outside the support block, a U-shaped plate fixed to the upper end of the support, and laser rangefinders disposed on the inner walls of both sides of the U-shaped plate, with the output ends of the two laser rangefinders facing the two sides of the support respectively.

[0014] It is worth noting that the independent ranging mechanism enables non-contact, high-precision quantitative measurement. Two laser rangefinders are positioned on either side of the support, allowing for precise measurement of the absolute horizontal displacement of the support (i.e., the bridge deformation transmission point) relative to the ground-fixed support (U-shaped plate).

[0015] Preferably, the steel block is inverted U-shaped, and the multiple limiting posts are arranged in two rows.

[0016] It is worth noting that the steel block adopts an inverted U-shaped structure and is connected to the fixed plate to form a sturdy top support frame, which steadily raises the two rows of limiting columns to the working height. The design of the two rows of limiting columns makes multi-line contact with the limiting columns when the sleeve is fitted on it, which greatly improves the guiding accuracy and stability of the sleeve when it moves horizontally.

[0017] Preferably, the height of the limiting post is higher than the height of the sleeve block.

[0018] It is worth noting that the height of the limiting post is higher than that of the sleeve block. This design ensures that the sleeve block is always penetrated and constrained by the limiting post during its entire horizontal sliding stroke, and will not come out from the top of the limiting post.

[0019] Preferably, the side wall of the fixed block is provided with a limiting mechanism for limiting the rack. The limiting mechanism includes a fixed rod fixed to the side wall of the fixed block and a limiting frame fixed to the end of the fixed rod away from the fixed block. The side wall of the rack and the inner wall of the limiting frame are in contact.

[0020] It is worth noting that the limiting mechanism provides an additional, stable sliding guide surface for the rack through a fixed rod and a limiting frame independent of the moving block. The limiting frame fits against the side wall of the rack, which can effectively constrain the rack's swing or twisting in the vertical plane, ensuring that the rack always maintains the correct meshing position with the gear during sliding. This can prevent poor meshing, jamming, or measurement errors caused by rack misalignment.

[0021] Preferably, both the first active block and the second active block are rectangular blocks, and the width of the first active block is greater than the width of the second active block.

[0022] It is worth noting that the width of the first movable block is greater than that of the second movable block, which causes the upper surface of the first movable block to form a protruding stepped surface on both sides of the second movable block. This stepped surface can mechanically limit the lateral displacement of the second movable block, preventing it from sliding laterally under long-term vibration, thereby improving the centering of the sleeve block when sliding along the limiting post. On the other hand, the increased width of the first movable block increases its contact area with the multiple springs below, allowing the supporting force transmitted by the springs to act more evenly on the entire movable assembly, which can avoid local deformation of the first movable block or spring failure due to stress concentration.

[0023] Preferably, multiple springs are distributed at equal intervals along the length of the horizontal plate.

[0024] It is worth noting that arranging multiple springs at equal intervals along the length of the horizontal plate ensures that the horizontal plate receives uniform elastic reaction force at each support point when bearing the load from the first movable block above. When the bridge undergoes vertical deformation or vibration, the equally spaced springs compress or rebound synchronously, ensuring that the lower surface of the first movable block always maintains good contact with the upper end of each spring. This prevents the first movable block from tilting or jamming due to uneven spring distribution. This design also makes the overall stiffness of the first movable block tend to be consistent along the length direction, thereby transmitting the bridge's displacement to the second movable block and the sleeve block without distortion, improving the linearity and repeatability of the monitoring data.

[0025] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. By setting up a clamping mechanism that includes U-shaped blocks and bolts, it can be directly snapped and locked to the side wall of the bridge support without the need for complex drilling or welding of the bridge structure, which realizes rapid installation and disassembly, significantly reducing the cost and difficulty of equipment deployment, and is especially suitable for large-scale deployment or temporary monitoring scenarios. 2. By setting up a mechanical monitoring mechanism consisting of gears, racks, and graduated grooves, supplemented by inclined shock absorbers, when the bridge deforms, its displacement is transmitted through the bracket, sleeve, and second movable block, driving the rack to move linearly, which in turn meshes with and drives the gears to rotate significantly. This process amplifies the minute linear displacement into a visible angular change, allowing inspection personnel to directly and quickly judge the deformation trend and degree on-site. At the same time, the shock absorbers effectively dissipate the high-frequency interference energy caused by daily traffic vibrations, ensuring that the monitoring signal mainly reflects the actual low-frequency or quasi-static deformation of the structure, thus improving the accuracy and reliability of the monitoring. 3. By setting two rows of limiting posts to guide the sleeve block in multiple lines and ensuring that the height of the limiting posts is higher than the sleeve block, and by using a limiting frame independent of the moving parts to constrain the rack, the accuracy and stability of the force and displacement transmission link are ensured, preventing jamming, disengagement or transmission errors that may occur during long-term use. In addition, by setting an independent ranging mechanism including a laser rangefinder, the precise displacement value of the bracket relative to the ground can be obtained non-contactly, providing recordable and transmittable quantitative data support for the aforementioned intuitive mechanical indication, and realizing complementary verification of intuitive judgment and precise measurement. Attached Figure Description

[0026] Figure 1 The diagram shown is a three-dimensional structural schematic of this utility model; Figure 2 The diagram shown is a three-dimensional structural schematic of the first movable block of this utility model; Figure 3The diagram shown is a three-dimensional structural schematic of the clamping mechanism of this utility model. Figure 4 The diagram shown is a three-dimensional structural schematic of the shock absorber of this utility model; Figure 5 The diagram shown is a three-dimensional structural schematic of the U-shaped plate of this utility model. Figure 6 The diagram shown is a three-dimensional structural schematic of the second movable block of this utility model; Figure 7 The diagram shown is a three-dimensional structural schematic of the monitoring mechanism of this utility model.

[0027] Reference numerals: 1. Bearing block; 2. Fixing block; 3. Support block; 4. Fixing plate; 5. Steel block; 6. Limiting post; 7. Horizontal plate; 8. Spring; 9. First movable block; 10. Sleeve block; 11. Second movable block; 12. Support; 13. U-shaped plate; 131. Laser rangefinder; 14. Bracket; 15. U-shaped block; 16. Bolt; 17. Shock absorber; 18. Fixing rod; 19. Limiting frame; 20. Limiting groove; 21. Rack; 22. First scale groove; 23. Fixing seat; 24. Rotating rod; 25. Gear; 26. Second scale groove. Detailed Implementation

[0028] 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.

[0029] To address the problems of high cost and complex installation of existing precision monitoring systems, low efficiency and discontinuous manual measurement, and lack of on-site intuitiveness in monitoring results, the following technical solution is proposed. Please refer to [link / reference]. Figures 1-7 ; Example 1: A visual bridge deformation monitoring device includes a bearing block 1, a fixing block 2 fixed to both sides of the bearing block 1, a support block 3 fixed to the upper end of the bearing block 1, a fixing plate 4 fixed to the upper end of the support block 3, a steel block 5 fixed to the upper end of the fixing plate 4, multiple limiting posts 6 fixed to the upper end of the steel block 5, a horizontal plate 7 fixed to both sides of the fixing plate 4, multiple springs 8 fixed to the upper end of the horizontal plate 7, a first movable block 9 fixed to the upper end of the springs 8, a second movable block 11 fixed to the upper end of the first movable block 9, a sleeve block 10 sleeved on the side wall of the multiple limiting posts 6 and sliding along the limiting posts 6, a ranging mechanism set outside the bearing block 1, a bracket 14 fixed to the upper end of the sleeve block 10, and a clamping mechanism set on the bracket 14. The side wall of the second movable block 11 and the side wall of the sleeve block 10 are fixedly connected to each other, and the sleeve block 10 drives the second movable block 11 to move synchronously. One of the first active blocks 9 is equipped with a monitoring mechanism for displaying the amount of bridge deformation.

[0030] In use, the clamping mechanism is used to clamp the bridge support block to the side wall, so that the lower end of the bearing block 1 is on the ground. When the bridge is subjected to vibration and deformation, the deformation or displacement will be transmitted to the sleeve block 10, which will then cause the monitoring mechanism to change. The monitoring mechanism can quickly show whether the bridge is deformed.

[0031] In this embodiment, specifically, the clamping mechanism includes a U-shaped block 15 fixed to the side wall of the bracket 14 and multiple bolts 16 threaded through and installed on both sides of the bracket 14.

[0032] In this embodiment, specifically: the upper end of the fixed block 2 is hinged to one end of the cylinder of the shock absorber 17, the output end of the shock absorber 17 is hinged to the lower end of the horizontal plate 7, and the shock absorber 17 is set at an angle.

[0033] In this embodiment, specifically: the monitoring mechanism includes a limiting groove 20 that runs through the upper end of one of the first movable blocks 9, a rack 21 that slides on the inner wall of the limiting groove 20, a plurality of first scale grooves 22 that are opened on the side wall of the rack 21, a fixed seat 23 that is fixed to the side wall of the second movable block 11, a rotating rod 24 that is rotatably installed on the inner wall of the fixed seat 23, and a gear 25 that is fixed to one end of the rotating rod 24. One end of the gear 25 is provided with a plurality of second scale grooves 26, which are distributed in a circumferential shape. The toothed grooves of the rack 21 are adapted to the gear 25.

[0034] In this embodiment, specifically: the steel block 5 is inverted U-shaped, and the multiple limiting posts 6 are arranged in two rows.

[0035] In this embodiment, specifically, the height of the limiting post 6 is higher than the height of the sleeve block 10.

[0036] In this embodiment, specifically: the side wall of the fixing block 2 is provided with a limiting mechanism for limiting the rack 21. The limiting mechanism includes a fixing rod 18 fixed to the side wall of the fixing block 2 and a limiting frame 19 fixed to the end of the fixing rod 18 away from the fixing block 2. The side wall of the rack 21 and the inner wall of the limiting frame 19 are in contact.

[0037] In this embodiment, specifically: both the first active block 9 and the second active block 11 are rectangular blocks, and the width of the first active block 9 is greater than the width of the second active block 11.

[0038] In this embodiment, specifically, multiple springs 8 are distributed at equal intervals along the length of the horizontal plate 7.

[0039] Example 2: Based on Example 1, this example provides a technical solution, specifically: the ranging mechanism includes a support 12 disposed outside the bearing block 1, a U-shaped plate 13 fixed to the upper end of the support 12, and laser rangefinders 131 disposed on the inner walls of both sides of the U-shaped plate 13. The output ends of the two laser rangefinders 131 face the two sides of the bracket 14 respectively. This design makes the ranging mechanism independent of the core vibration monitoring module of the equipment. During installation, the support 12 of the ranging mechanism can be fixed to a stable ground first, and then the main body of the equipment can be adjusted, which facilitates the rapid calibration and alignment of the measurement reference between the laser rangefinders 131 and the bracket 14, ensuring the prerequisite for high-precision measurement. In addition, the two laser rangefinders 131 are respectively aligned with the two sides of the bracket 14, and the two different laser rangefinders 131 can be used to obtain the two different values ​​of the bracket 14. The displacement data of the measuring points can be used to calculate the average value of the lateral displacement, effectively reducing the random errors that may exist in single-point measurements. At the same time, by comparing the differences in displacement data on both sides, it is possible to further determine whether the bridge deformation is accompanied by slight torsion or skew, thereby expanding the dimensions of monitoring and providing richer information on the structural safety status. Since a non-contact laser rangefinder 131 is used to measure the displacement of the support 14, friction, wear or lag caused by mechanical contact is avoided. The measurement accuracy is high and the response is fast. The obtained displacement data is a digital electrical signal, which is convenient for remote transmission, automatic recording and subsequent analysis. It provides a reliable quantitative basis for historical data tracing and deformation trend early warning, and can form an effective data complement and verification with the intuitive indication of the aforementioned mechanical monitoring mechanism.

[0040] Working principle: During installation, the operator first inserts the U-shaped block 15 of the clamping mechanism into the side wall of the bridge support block, and then tightens the bolts 16 on both sides of the bracket 14, thereby firmly installing the entire device on the bridge structure. Meanwhile, the support block 1 is placed stably on the ground, and the support 12 of the ranging mechanism is independently fixed on the stable ground outside the support block 1. The position of the U-shaped plate 13 is adjusted so that the output ends of the two laser rangefinders 131 are precisely aligned with the two sides of the bracket 14. When the bridge deforms due to load, temperature changes, or foundation settlement, the deformation force is transmitted to the support 14 through the bridge support block. The support 14 drives the sleeve block 10 fixed to it to generate horizontal displacement along the guide of the limiting post 6. The movement of the sleeve block 10 synchronously drives the second movable block 11 to move. The second movable block 11 pushes the gear 25 to rotate through the fixed seat 23 on its side wall. The rotation of the gear 25 is achieved by meshing with the rack 21 which is slidably set in the upper limit groove 20 of the first movable block 9. The transmission between the gear 25 and the rack 21 amplifies the small horizontal linear displacement of the bridge and converts it into a significant circular rotation of the gear 25. At this time, by observing the deflection angle of the second scale groove 26 on the gear 25 relative to the fixed reference point, or the sliding distance of the first scale groove 22 on the rack 21, the inspection personnel can intuitively and quickly determine the direction and approximate magnitude of the bridge deformation on site. At the same time, two laser rangefinders 131 continuously emit lasers and receive signals reflected back from both sides of the bracket 14, and accurately measure the absolute displacement value of the bracket 14 relative to the ground fixed support 12 in the horizontal direction without contact. This data is recorded in real time and can be transmitted remotely. Throughout the monitoring process, the system consisting of spring 8, first movable block 9 and second movable block 11 provides necessary buffering for the monitoring mechanism, while the inclined shock absorber 17 can effectively dissipate the high-frequency vibration energy caused by vehicle passage, suppress the continuous shaking of spring 8 and movable block, and ensure that the monitoring mechanism mainly reflects the true deformation of the structure. In addition, the full-process guidance and constraint of the limiting post 6 on the sleeve block 10, and the constraint of the limiting frame 19 on the lateral movement of the rack 21, together ensure the accuracy and stability of the displacement transmission and mechanical transmission process. Through the coordinated work of the above-mentioned mechanical magnification visualization monitoring and optical precision ranging, this utility model realizes the organic combination of rapid and intuitive on-site judgment of bridge deformation and remote quantitative data recording.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A visual bridge deformation monitoring device, characterized in that: It includes a bearing block (1), a fixing block (2) fixed to both sides of the bearing block (1), a support block (3) fixed to the upper end of the bearing block (1), a fixing plate (4) fixed to the upper end of the support block (3), a steel block (5) fixed to the upper end of the fixing plate (4), multiple limiting posts (6) fixed to the upper end of the steel block (5), a horizontal plate (7) fixed to both sides of the fixing plate (4), multiple springs (8) fixed to the upper end of the horizontal plate (7), a first movable block (9) fixed to the upper end of the spring (8), a second movable block (11) fixed to the upper end of the first movable block (9), a sleeve block (10) sleeved on the side wall of the multiple limiting posts (6) and sliding along the limiting posts (6), a ranging mechanism set outside the bearing block (1), a bracket (14) fixed to the upper end of the sleeve block (10), and a clamping mechanism set on the bracket (14); The side wall of the second movable block (11) and the side wall of the sleeve block (10) are fixedly connected to each other, and the sleeve block (10) drives the second movable block (11) to move synchronously. One of the first active blocks (9) is equipped with a monitoring mechanism for displaying the amount of bridge deformation.

2. The visual bridge deformation monitoring device according to claim 1, characterized in that: The clamping mechanism includes a U-shaped block (15) fixed to the side wall of the bracket (14) and multiple bolts (16) threaded through and installed on both sides of the bracket (14).

3. The visual bridge deformation monitoring device according to claim 1, characterized in that: The upper end of the fixed block (2) is hinged to one end of the cylinder of the shock absorber (17), the output end of the shock absorber (17) is hinged to the lower end of the horizontal plate (7), and the shock absorber (17) is set at an angle.

4. The visual bridge deformation monitoring device according to claim 1, characterized in that: The monitoring mechanism includes a limiting groove (20) that runs through the upper end of one of the first movable blocks (9), a rack (21) that slides on the inner wall of the limiting groove (20), multiple first scale grooves (22) that are opened on the side wall of the rack (21), a fixed seat (23) that is fixed to the side wall of the second movable block (11), a rotating rod (24) that is rotatably installed on the inner wall of the fixed seat (23), and a gear (25) that is fixed to one end of the rotating rod (24). Multiple second scale grooves (26) are opened at one end of the gear (25). The multiple second scale grooves (26) are distributed in a circular shape. The tooth groove of the rack (21) is adapted to the gear (25).

5. The visual bridge deformation monitoring device according to claim 1, characterized in that: The ranging mechanism includes a support (12) set outside the bearing block (1), a U-shaped plate (13) fixed to the upper end of the support (12), and laser rangefinders (131) set on the inner walls of both sides of the U-shaped plate (13). The output ends of the two laser rangefinders (131) are respectively facing the two sides of the bracket (14).

6. The visual bridge deformation monitoring device according to claim 1, characterized in that: The steel block (5) is inverted U-shaped, and multiple limiting posts (6) are arranged in two rows.

7. The visual bridge deformation monitoring device according to claim 1, characterized in that: The height of the limiting post (6) is higher than the height of the sleeve block (10).

8. The visual bridge deformation monitoring device according to claim 4, characterized in that: The side wall of the fixed block (2) is provided with a limiting mechanism for limiting the rack (21). The limiting mechanism includes a fixed rod (18) fixed to the side wall of the fixed block (2) and a limiting frame (19) fixed to the end of the fixed rod (18) away from the fixed block (2). The side wall of the rack (21) and the inner wall of the limiting frame (19) are in contact.

9. A visual bridge deformation monitoring device according to claim 1, characterized in that: Both the first active block (9) and the second active block (11) are rectangular blocks, and the width of the first active block (9) is greater than the width of the second active block (11).

10. A visual bridge deformation monitoring device according to claim 1, characterized in that: Multiple springs (8) are evenly distributed along the length of the horizontal plate (7).

Images