A multi-directional force measuring support with infinitely adjustable height

Abstract

The utility model discloses a multi -directional force measuring support of stepless regulation height, including upper portion structure, upper portion structure includes the upper support plate, middle seat board, lower support plate and base plate that set gradually from top to bottom, be provided with the spherical cap lining board between the upper support plate and the middle seat board, the bottom surface of upper support plate and the top surface of middle seat board correspond to concave spherical surface, the upper and lower surface of spherical cap lining board are spherical surface, the upper end surface of spherical cap lining board and the bottom of upper support plate form first sliding friction pair, the lower portion of middle seat board is provided with lower support plate, the lower portion of lower support plate is equipped with base plate, and form the pelvic cavity between lower support plate and base plate.

Description

Technical Field

[0001] This utility model relates to the field of bridge equipment technology, specifically to a multi-directional force measuring support with stepless height adjustment. Background Technology

[0002] Bridge bearings are important components that connect the superstructure and substructure of a bridge. They reliably transfer the reaction force and deformation of the superstructure to the substructure, so that the stress condition of the structure matches the theoretical calculation diagram. Human factors such as overloading and natural factors such as earthquakes and typhoons can cause varying degrees of damage to bridges.

[0003] The Chinese utility model CN215952836U proposes a "multi-directional force measuring support". This device realizes the measurement of vertical force by setting an inclined mounting plate and a pressure sensor between the lower support plate and the base plate; at the same time, it realizes the measurement of horizontal force in the longitudinal direction of the bridge by setting a transverse limiting block and a pressure sensor at the bottom of the upper support plate. The overall structure is ingenious, the force measurement accuracy is high, and the maintenance is convenient. However, the support structure is fixed and does not have the ability to adjust the height. If the support height needs to be adjusted during bridge construction, operation and maintenance or settlement adjustment, it is usually necessary to lift the bridge, which is complicated, costly, risky and cannot achieve fine stepless adjustment. Utility Model Content

[0004] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and provide a multi-directional force measuring support with stepless height adjustment, which solves the technical problem that the existing bridge supports do not have height adjustment function, which leads to the need to lift the bridge during actual construction, increasing production costs and posing greater risks.

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

[0006] In the first aspect, this utility model provides a multi-directional force measuring support with stepless height adjustment, including an upper structure, which includes an upper support plate, a middle support plate, a lower support plate and a base plate arranged sequentially from top to bottom;

[0007] A spherical crown liner is provided between the upper support plate and the middle support plate. The bottom surface of the upper support plate and the top surface of the middle support plate are concave spherical surfaces, and both the upper and lower surfaces of the spherical crown liner are spherical surfaces. The upper surface of the spherical crown liner and the bottom of the upper support plate form a first sliding friction pair. A lower support plate is provided below the middle support plate, and a base plate is provided below the lower support plate. A basin is formed between the lower support plate and the base plate. Two wedge-shaped blocks that can move in opposite directions are provided in the basin for adjusting the position and height of the upper structure.

[0008] The contact surface between the wedge block and the upper end of the pelvis is an inclined surface, and when the two wedge blocks move to the designated position, a limiting steel plate is provided in the horizontal gap between the two wedge blocks.

[0009] In some embodiments, a force sensor is located within the pelvic cavity and between the two wedges to monitor vertical forces and provide feedback for the height adjustment process.

[0010] In some embodiments, the two ends of the wedge block extend to the outside of the pelvic cavity, and the wedge block is provided with mounting holes, in which either a jack or an adjusting screw is provided and used to push it to move in the horizontal direction.

[0011] In some embodiments, the lower end face of the spherical crown liner and the upper end face of the middle seat plate form a second sliding friction pair.

[0012] In some embodiments, the lower end face of the middle seat plate and the upper end face of the lower support plate form a third sliding friction pair.

[0013] In some embodiments, a fourth sliding friction pair is formed between the two sides of the middle seat plate and the inner wall of the lower support plate.

[0014] In some embodiments, the inner top surface of the pelvis and the upper end surface of the wedge block form a fifth sliding friction pair.

[0015] In some embodiments, the lower end face of the wedge block and the upper end face of the base plate form a sixth sliding friction pair.

[0016] Compared with existing technologies, this utility model provides a multi-directional force-measuring support with stepless height adjustment. By setting a pair of wedge-shaped blocks that can move in opposite directions within the basin of the base plate, when the two wedge-shaped blocks are displaced in the horizontal direction, their inclined surfaces interact, continuously and smoothly pushing the upper structure, lower support plate, middle support plate, upper support plate, and bridge, achieving continuous height adjustment. This height adjustment process does not require lifting the main bridge structure; it only requires using small tools such as jacks to push the wedge-shaped blocks locally on the support. It requires minimal operating space, greatly reducing construction difficulty, operational risks, and impact on traffic. The sliding adjustment method of the wedge-shaped blocks allows for millimeter-level or even more precise height adjustments. It can accurately meet the strict elevation requirements of bridges during construction, installation, settlement compensation, or maintenance adjustments, significantly improving the accuracy of construction and maintenance. The height adjustment function is integrated inside the basin structure of the bearing, forming a layered layout with the upper spherical crown liner rotating structure. The structure is compact and does not increase the overall height of the bearing or occupy external space. This device not only realizes height adjustment but also considers the long-term stability after height adjustment. When the height is adjusted to the correct position, it can be permanently or semi-permanently fixed by filling the gaps between the wedge blocks with steel plates, etc., transforming the adjustable mechanism into a rigid support. This ensures that the bearing can bear load reliably in subsequent long-term service and avoids the risk of loosening or creep that may exist in the adjustable mechanism. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the internal structure of the steplessly height-adjustable multi-directional force measuring support provided in this embodiment of the utility model;

[0018] Figure 2 This is a side view of the steplessly height-adjustable multi-directional force measuring support provided in this embodiment of the utility model;

[0019] Figure 3 This is a top view of the steplessly height-adjustable multi-directional force measuring support provided in this embodiment of the utility model;

[0020] Figure 4 This is a three-dimensional cross-sectional schematic diagram of the steplessly height-adjustable multi-directional force measuring support provided in this embodiment of the utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Upper support plate; 2. Spherical crown liner; 3. Middle support plate; 4. Lower support plate; 41. Basin; 5. Base plate; 6. Wedge block; 61. Inclined end; 62. Force sensor; 63. Mounting hole; 7. First sliding friction pair; 8. Second sliding friction pair; 9. Third sliding friction pair; 10. Fourth sliding friction pair; 11. Fifth sliding friction pair; 12. Sixth sliding friction pair. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] To address the technical problem that existing bridge bearings lack height adjustment capabilities, necessitating bridge jacking during construction, which increases production costs and poses significant risks, this invention provides a multi-directional force-measuring bearing with stepless height adjustment, enabling height adjustment of the bridge structure.

[0024] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a steplessly height-adjustable multi-directional force measuring support in one embodiment of the present invention. A steplessly height-adjustable multi-directional force measuring support includes an upper structure, which includes an upper support plate 1, a middle support plate 3 and a lower support plate 4 arranged sequentially from top to bottom.

[0025] A spherical crown liner 2 is provided between the upper support plate 1 and the middle support plate 3. A lower support plate 4 is provided below the middle support plate 3. A base plate 5 is provided below the lower support plate 4. A basin 41 is formed between the lower support plate 4 and the base plate 5. Two wedge blocks 6 that can move in opposite directions are provided in the basin 41 to adjust the position and height of the upper structure.

[0026] In this embodiment, two wedge-shaped blocks 6 that can move in opposite directions are set in the basin 41 between the lower support plate 4 and the base plate 5. Utilizing the principle of inclined plane transmission, the horizontal thrust is converted into continuous vertical displacement of the superstructure, achieving stepless and precise adjustment of the support height. The height adjustment process does not require lifting the main bridge structure; it only requires applying horizontal thrust locally on the support, significantly reducing construction difficulty, operational risks, and impact on traffic. This height adjustment mechanism is fully integrated into the basin 41 inside the support, with a compact structure that does not increase external space occupation, achieving a high degree of integration between the height adjustment function and the support body. After the height is adjusted to the correct position, it can... Rigid consolidation is achieved by inserting a limiting steel plate into the gap of the wedge block 6, ensuring the stability of long-term load-bearing and avoiding the risk of loosening or creep. At the same time, the structure provides space for the integration of the force sensor 62, enabling multi-directional force monitoring during the height adjustment process, and has the potential to develop into an intelligent bearing. The overall solution not only solves the technical problems of traditional bearing height adjustment requiring the jacking of the bridge, which is complex and dangerous, but also has the advantages of high adjustment accuracy, convenient construction, and low maintenance cost. It is particularly suitable for the construction, installation, and subsequent settlement compensation of large-span bridges and high-speed railway bridges with strict requirements for elevation accuracy, and has outstanding substantive features and significant progress.

[0027] In one embodiment, please refer to Figure 1 - Figure 4To improve the working efficiency of the wedge block 6, the contact surface between the wedge block 6 and the upper end of the pelvic cavity 41 is an inclined end 61. After the two wedge blocks 6 move to the designated position, a limiting steel plate is set in the horizontal gap between the two wedge blocks 6. A force sensor 62 is set inside the pelvic cavity 41 and between the two wedge blocks 6. The two ends of the wedge block 6 extend to the outside of the pelvic cavity 41, and the wedge block 6 is provided with a mounting hole 63. A jack or an adjusting screw is set in the mounting hole 63 and used to push it to move in the horizontal direction.

[0028] In this embodiment, the contact surface between the wedge block 6 and the upper end of the basin 41 is the inclined end 61, forming a typical wedge transmission mechanism. When the two wedge blocks 6 move towards or away from each other in the horizontal direction, their inclined ends 61 form a sliding fit with the top surface of the basin 41, i.e., the bottom of the lower support plate 4. Through the squeezing action of the inclined ends 61, the horizontal displacement is converted into continuous vertical lifting or lowering, realizing the smooth and stepless height adjustment of the upper structure, i.e., the upper support plate 1, the middle support plate 3, the lower support plate 4, and the bridge beam. This structure has a clear force transmission path, high mechanical efficiency, continuous and controllable adjustment process, and high precision. With millimeter-level precision, it meets the stringent requirements for elevation control during bridge construction, installation, and operational settlement compensation. Secondly, after the two wedge blocks 6 move to their designated positions, limiting steel plates are installed within their horizontal gap, achieving structural rigid locking after height adjustment. This transforms the originally movable adjustment mechanism into a stable and reliable rigid support, effectively preventing height drift or loosening caused by creep, vibration, or temperature changes under long-term loads. It ensures that the support retains load-bearing capacity and structural stability comparable to traditional fixed supports after height adjustment, balancing the dual requirements of adjustability and safety, and enhancing… To ensure the long-term reliability of the bearing, a force sensor 62 is installed between the two wedge blocks 6, enabling real-time monitoring of the internal stress state of the bearing. This sensor can directly sense the pressure changes between the two wedge blocks 6, thereby inferring the magnitude of the vertical load borne by the bearing. It can even indirectly measure the horizontal force through multi-point arrangement, giving the bearing multi-directional force measurement capabilities. This supports data acquisition for bridge health monitoring systems, providing crucial data support for stress safety assessments during heightening processes and structural condition diagnosis during operation. Furthermore, this promotes the development of bearings towards intelligence and information technology. The two ends of the wedge block 6 extend to the outside of the basin 41 and are provided with mounting holes 63. A jack or adjusting screw can be installed in the mounting holes 63, providing a convenient operating interface for horizontal drive. This structure allows external power devices, such as small hydraulic jacks or manual screws, to act directly on the wedge block 6 without entering the closed basin 41, which greatly simplifies the height adjustment process, reduces the construction space requirements, and facilitates quick on-site installation and maintenance. At the same time, this drive method is flexible, which can achieve both rapid jacking and fine adjustment through the screw, adapting to the adjustment needs under different working conditions.

[0029] In one embodiment, please refer to Figure 1 - Figure 4 To improve the movement efficiency of the internal structure, the bottom surface of the upper support plate 1 and the top surface of the middle support plate 3 are concave spherical surfaces, and the upper and lower surfaces of the spherical crown liner 2 are both spherical surfaces. The upper end surface of the spherical crown liner 2 forms a first sliding friction pair 7 with the bottom of the upper support plate 1, the lower end surface of the spherical crown liner 2 forms a second sliding friction pair 8 with the upper end surface of the middle support plate 3, the lower end surface of the middle support plate 3 forms a third sliding friction pair 9 with the upper end surface of the lower support plate 4, the two sides of the middle support plate 3 form a fourth sliding friction pair 10 with the inner wall of the lower support plate 4, the inner top surface of the pelvis 41 forms a fifth sliding friction pair 11 with the upper end surface of the wedge block 6, and the lower end surface of the wedge block 6 forms a sixth sliding friction pair 12 with the upper end surface of the base plate 5.

[0030] In this embodiment, the bottom surface of the upper support plate 1 and the top surface of the middle support plate 3 are matched concave spherical surfaces. A double-spherical crown liner 2 is set in the middle, forming a first sliding friction pair 7 and a second sliding friction pair 8, constituting a typical ball joint structure. This structure allows the superstructure, i.e., the bridge beam, to rotate at a small angle in three-dimensional space relative to the middle support plate 3, effectively adapting to the angle requirements of the bridge caused by temperature deformation, concrete shrinkage and creep, live load, etc., avoiding stress concentration, and ensuring uniform force transmission. At the same time, the sliding friction pair between the spherical surfaces has self-resetting capability, which can restore the initial position after the angle is released, improving the durability and stability of the support. Secondly, the lower end surface of the middle support plate 3 and the... A third sliding friction pair 9 is formed on the upper end face of the lower support plate 4, and a fourth sliding friction pair 10 is formed between the two sides of the middle support plate 3 and the inner wall of the lower support plate 4. These two sets of friction pairs together realize the multi-directional sliding capability of the middle support plate 3 within the lower support plate 4. The third sliding friction pair 9 mainly bears the vertical load and allows horizontal displacement in the longitudinal or transverse direction of the bridge, while the fourth sliding friction pair 10 restricts the excessive lateral offset of the middle support plate 3 and provides a lateral sliding channel. Together, they constitute a typical pot bearing sliding system, ensuring the safe release of deformation of the support under horizontal loads such as earthquakes, wind loads, and braking forces, and preventing structural damage. Furthermore, the top surface of the inner cavity 41, i.e., the bottom of the lower support plate 4, and the wedge block 6 The upper end face forms the fifth sliding friction pair 11, and the lower end face of the wedge block 6 and the upper end face of the base plate 5 form the sixth sliding friction pair 12. These two sets of friction pairs are the core of realizing the "stepless height adjustment" function. When the wedge block 6 moves in the horizontal direction, the fifth sliding friction pair 11 and the sixth sliding friction pair 12 slide relative to each other in the vertical direction, so that the inclined end 61 of the wedge block 6 pushes the lower support plate 4 and its upper structure to continuously rise and fall. These two sets of friction pairs use low friction coefficient materials, such as polytetrafluoroethylene and stainless steel, to ensure that smooth lifting can be achieved under a small horizontal thrust, reduce the load requirements of the drive device, and improve the height adjustment efficiency and accuracy. Through the division of the six sliding friction pairs The layered layout and functional decoupling enables the support height adjustment function. The upper ball joint structure is responsible for rotation by the first sliding friction pair 7 and the second sliding friction pair 8. The middle basin sliding structure is responsible for horizontal displacement release by the third sliding friction pair 9 and the fourth sliding friction pair 10. The lower wedge block 6 sliding structure is dedicated to the height adjustment function by the fifth sliding friction pair 11 and the sixth sliding friction pair 12. Each friction pair is arranged in layers in space and performs its own function in terms of force, avoiding functional conflicts. This ensures that the rotation and sliding capabilities of the upper structure are not affected during the height adjustment process. After the height adjustment is completed, all friction pairs can still work normally, ensuring the integrity and reliability of the overall performance of the support.

[0031] To better understand this utility model, the following is combined with... Figures 1 to 4The technical solution of this utility model is described in detail as follows: The support is hoisted as a whole to the pre-embedded anchoring position of the bridge pier or abutment, and firmly connected to the concrete foundation through the anchor bolt holes on the base plate 5 to ensure that the base plate 5 is fixed. The upper support plate 1 is connected to the bridge beam through anchor bolts to complete the upper and lower end fixation of the support. The two wedge blocks 6 are initially located in the center or in a preset position in the basin 41. Their inclined ends 61 form inclined contact with the bottom of the lower support plate 4 and the top surface of the basin 41, forming the fifth sliding friction pair 11. The bottom surface of the wedge block 6 and the top surface of the base plate 5 form the sixth sliding friction pair 12. An initial horizontal gap is left between the wedge blocks 6. The force sensor 62 is pre-embedded in this gap for subsequent force monitoring. The spherical crown liner 2 is placed between the upper support plate 1 and the middle support plate 3. Between the upper and lower spherical surfaces, the first sliding friction pair 7 and the second sliding friction pair 8 are formed with the concave spherical surface of the bottom surface of the upper support plate 1 and the concave spherical surface of the top surface of the middle support plate 3, respectively. The middle support plate 3 forms the third sliding friction pair 9 and the fourth sliding friction pair 10 with the bottom and side surfaces of the lower support plate 4, respectively. This allows the middle support plate 3 to slide and be limited in the horizontal direction. At this time, the support is in a standard load-bearing state and has the rotation and sliding functions of a conventional pot bearing. The height has not yet been adjusted. When the bridge experiences uneven settlement, installation elevation deviation, or requires alignment adjustment, an external drive device, such as a small hydraulic jack or a manual adjusting screw, is installed into the mounting holes 63 extending from both ends of the wedge block 6 out of the basin cavity 41. If a jack is used, rapid pushing can be achieved. If a screw is used, it is suitable for fine adjustment. One end of the drive device is fixed to the base plate 5 or an external bracket, and the other end acts on the end of the wedge block 6. Simultaneously activating the drive devices on both sides, the two wedge blocks 6 move towards each other in the horizontal direction, i.e., towards the center of the pelvis 41. Since the wedge block 6 contacts the top surface of the pelvis 41 and the bottom of the lower support plate 4 at an angle, their relative sliding causes vertical displacement accumulation. As the wedge block 6 moves inward, its angled end 61 continuously lifts the lower support plate 4. Through the fifth sliding friction pair 11, i.e., the upper end of the wedge block 6 and the bottom surface of the lower support plate 4, vertical force is transmitted. The lower support plate 4 drives the middle support plate 3, the spherical crown liner 2, the upper support plate 1, and the connected bridge beams to rise synchronously. The sixth sliding friction pair 12 ensures smooth sliding of the bottom of the wedge block 6 during horizontal movement, reducing frictional resistance. The entire lifting process is continuous and stepless, and the lifting height can be precisely controlled by controlling the displacement of the drive device, with an accuracy down to the millimeter level. During the height adjustment, the upper first sliding friction pair 7 and the second sliding friction pair 8 allow the upper support plate 1 to rotate slightly relative to the middle support plate 3, adapting to posture changes during the lifting process and avoiding stress concentration. The middle third sliding friction pair 9 and the fourth sliding friction pair 10 allow the middle support plate 3 to slide freely within the lower support plate 4, ensuring that the height adjustment does not hinder the horizontal displacement release capability. The force sensor 62 continuously monitors the pressure change between the two wedge blocks 6, reflecting the distribution of the vertical load. When the support is raised to the design elevation, the drive device is stopped, and the wedge blocks 6 are kept in a stable position within the horizontal gap between the two wedge blocks 6.Insert the limiting steel plate from the side or top to fill the remaining gap. The limiting steel plate fits tightly with the wedge block 6, forming a rigid support structure. The insertion of the limiting steel plate prevents the two wedge blocks 6 from moving relative to each other, and the fifth sliding friction pair 11 and the sixth sliding friction pair 12 stop working, thus disabling the height adjustment function.

[0032] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A multi-directional force-measuring support with stepless height adjustment, comprising an upper structure, the upper structure including an upper support plate, a middle support plate, a lower support plate, and a base plate arranged sequentially from top to bottom, characterized in that: A spherical crown liner is provided between the upper support plate and the middle support plate. The bottom surface of the upper support plate and the top surface of the middle support plate are concave spherical surfaces, and both the upper and lower surfaces of the spherical crown liner are spherical surfaces. The upper surface of the spherical crown liner and the bottom of the upper support plate form a first sliding friction pair. A lower support plate is provided below the middle support plate, and a base plate is provided below the lower support plate. A basin is formed between the lower support plate and the base plate. Two wedge-shaped blocks that can move in opposite directions are provided in the basin for adjusting the position and height of the upper structure. The contact surface between the wedge block and the upper end of the pelvis is an inclined surface, and when the two wedge blocks move to the designated position, a limiting steel plate is provided in the horizontal gap between the two wedge blocks.

2. The multi-directional force measuring support with stepless height adjustment according to claim 1, characterized in that: A force sensor is located within the pelvic cavity and between the two wedges to monitor vertical forces and provide feedback during the height adjustment process.

3. The multi-directional force measuring support with stepless height adjustment according to claim 1, characterized in that: Both ends of the wedge block extend to the outside of the pelvic cavity, and the wedge block is provided with mounting holes. Either a jack or an adjusting screw is installed in the mounting holes and used to push it to move in the horizontal direction.

4. The multi-directional force measuring support with stepless height adjustment according to claim 1, characterized in that: The lower end face of the spherical crown liner and the upper end face of the middle seat plate form a second sliding friction pair.

5. A multi-directional force measuring support with stepless height adjustment according to claim 1, characterized in that: The lower end face of the middle seat plate and the upper end face of the lower support plate form a third sliding friction pair.

6. A multi-directional force measuring support with stepless height adjustment according to claim 1, characterized in that: A fourth sliding friction pair is formed between the two sides of the middle seat plate and the inner wall of the lower support plate.

7. A multi-directional force measuring support with stepless height adjustment according to claim 1, characterized in that: The inner top surface of the pelvis and the upper end surface of the wedge-shaped block form a fifth sliding friction pair.

8. A multi-directional force measuring support with stepless height adjustment according to claim 1, characterized in that: The lower end face of the wedge block and the upper end face of the base plate form a sixth sliding friction pair.

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