Force-measuring swivel spherical hinge

Abstract

The utility model discloses a force-measuring swivel spherical hinge, which comprises a base, an upper spherical hinge and a lower spherical hinge movably connected with the upper spherical hinge, a basin cavity is arranged on the base, fluid substances are filled in the basin cavity, the basin cavity is suitable for the lower spherical hinge to be embedded and the lower spherical hinge is hermetically connected with the basin cavity, a force-measuring interface is arranged on the side wall of the basin cavity, and the force-measuring interface is connected with the lower spherical hinge. The force measuring interface is connected with a pressure sensing element in a sealed mode, under the action of vertical force, the lower spherical hinge extrudes the fluid substance, and the pressure sensing element detects extrusion force borne by the fluid substance to obtain the vertical force. According to the utility model, the actual stress condition of the bridge can be monitored in the bridge rotation process, whether the unbalance loading condition of the bridge exists or not can be found in time, and the safety of the bridge is ensured to be correctly analyzed and judged.

Description

Technical Field

[0001] The utility model relates to the technical field of rotating ball hinges, in particular to a force-measuring rotating ball hinge. Background Technique

[0002] With the rapid development of the national economy, infrastructure, especially the transportation industry, has been vigorously developed. Due to the influence of some terrains or existing traffic facilities, the rotating bridge construction method is more and more widely used in bridge construction. Compared with the traditional construction technology, the rotating construction technology has the characteristics of not disturbing traffic, not interrupting navigation, being able to cross deep ditches, rivers, and roads with frequent traffic, and the construction is fast, economical and efficient.

[0003] The rotating ball hinge is a key link in the rotating construction. The existing rotating ball hinges basically only have the function of rotating support, and some also have the function of height adjustment, with poor applicability. During the bridge rotation process, the existing rotating ball hinges cannot know the stress condition of the upper structure, especially cannot find whether there is an eccentric load situation, and the safety of the bridge cannot be guaranteed. Content of the Utility Model

[0004] The purpose of the utility model is to provide a force-measuring rotating ball hinge, which can monitor the actual stress condition of the bridge during the bridge rotation process, timely discover whether there is an eccentric load situation of the bridge, and ensure the correct analysis and judgment of the bridge safety.

[0005] To solve the above technical problems, the utility model adopts the following scheme:

[0006] A force-measuring rotating ball hinge includes a base, an upper ball hinge, and a lower ball hinge movably connected to the upper ball hinge. A pelvic cavity is formed on the base, and a fluid substance is filled in the pelvic cavity. The pelvic cavity is suitable for the lower ball hinge to be embedded and the lower ball hinge is hermetically connected to the pelvic cavity. A force-measuring interface is formed on the side wall of the pelvic cavity, and a pressure-sensitive element is hermetically connected to the force-measuring interface. Under the action of a vertical force, the lower ball hinge squeezes the fluid substance, and the pressure-sensitive element detects the extrusion force received by the fluid substance to obtain the vertical force.

[0007] Due to the adoption of the above technical solution, the base, as the basic part of the entire force-measuring rotating ball hinge, is provided with a pelvic cavity thereon. The upper ball hinge is movably connected to the lower ball hinge and can rotate relative to each other for the rotation of the bridge. The lower ball hinge is embedded in the pelvic cavity of the base. A sealed connection is provided between the lower ball hinge and the pelvic cavity. A fluid substance is filled in the pelvic cavity of the base for transmitting and measuring force. A force-measuring interface is opened on the side wall of the pelvic cavity for connecting a pressure-sensitive element. The pressure-sensitive element is hermetically connected to the force-measuring interface for detecting the extrusion force received by the fluid substance. When a vertical force acts on the lower ball hinge, the lower ball hinge will extrude the fluid substance in the pelvic cavity. After being extruded, the fluid substance will generate a pressure related to the magnitude of the vertical force. This pressure is transmitted to the pressure-sensitive element through the force-measuring interface. After detecting this pressure, the pressure-sensitive element can convert it into an electrical signal or other measurable signals, thereby obtaining the magnitude of the vertical force. During the rotation of the bridge, the actual force-bearing condition of the bridge can be obtained, and it can be known in time whether the bridge is eccentrically loaded, so as to make a correct analysis and judgment on the safety of the bridge.

[0008] Optionally, the fluid substance is silicone grease, butter or hydraulic oil.

[0009] Optionally, an injection flow channel communicating with the pelvic cavity is opened on the side wall of the pelvic cavity, and the force-measuring interface is arranged at the inlet of the injection flow channel.

[0010] Optionally, a rubber sealing ring is embedded at the edge where the lower end of the lower ball hinge contacts the side wall of the pelvic cavity, and the rubber sealing ring is pressed tightly between the side wall of the lower ball hinge and the side wall of the pelvic cavity.

[0011] Optionally, the pressure-sensitive element is a diffused silicon pressure sensor, a ceramic pressure sensor or a strain gauge, and the pressure-sensitive elements are distributed in a cross shape in the circumferential direction of the lower ball hinge.

[0012] Optionally, the pressure-sensitive element is hermetically connected to the force-measuring interface by means of threaded fit.

[0013] Optionally, the bottom surface of the upper ball hinge is in spherical contact with the top surface of the lower ball hinge. The bottom surface of the upper ball hinge is a convex spherical surface protruding downward, and the top surface of the lower ball hinge is a concave spherical surface recessed downward. A suitable spherical slide plate is embedded in the top surface of the lower ball hinge.

[0014] Optionally, a positioning pin protruding upward is provided at the central position of the top surface of the lower ball hinge, and a pin hole recessed upward and adapted to the positioning pin is provided at the center of the bottom surface of the upper ball hinge. The positioning pin is in rotational fit with the pin hole.

[0015] Optionally, the upper ball hinge is fixedly connected to the beam body by anchor bolts. A buried steel plate is provided on the bottom surface of the base, and the buried steel plate is pre-fixed inside the pier column. The base, the buried steel plate and the pier column are fixedly connected by anchor bolts.

[0016] Optionally, the top surface of the embedded steel plate has several rectangular grids, and a grouting hole adapted to the anchor bolt is provided in the middle of each rectangular grid, and exhaust holes are circumferentially distributed around the grouting hole.

[0017] The beneficial effects of the present utility model are as follows:

[0018] 1. In the present utility model, the base is the basic part of the entire force-measuring rotating body spherical hinge. A pelvic cavity is provided thereon. The upper spherical hinge is movably connected to the lower spherical hinge and can rotate relative to each other for the rotation of the bridge. The lower spherical hinge is embedded in the pelvic cavity of the base. The lower spherical hinge and the pelvic cavity are hermetically connected. A fluid substance is filled in the pelvic cavity of the base for transmitting and measuring force. A force-measuring interface is provided on the side wall of the pelvic cavity for connecting a pressure-sensing element. The pressure-sensing element is hermetically connected to the force-measuring interface for detecting the extrusion force received by the fluid substance. When a vertical force acts on the lower spherical hinge, the lower spherical hinge will extrude the fluid substance in the pelvic cavity. After being extruded, the fluid substance will generate a pressure related to the magnitude of the vertical force. This pressure is transmitted to the pressure-sensing element through the force-measuring interface. After detecting this pressure, the pressure-sensing element can convert it into an electrical signal or other measurable signals, so as to obtain the magnitude of the vertical force, and the actual stress condition of the bridge can be obtained during the rotation of the bridge, and it can be known in time whether the bridge is eccentrically loaded, so as to make a correct analysis and judgment on the safety of the bridge. Description of the Drawings

[0019] Figure 1 is a half-sectional structural schematic diagram of the present utility model;

[0020] Figure 2 is Figure 1 a partial enlarged view at A in

[0021] Figure 3 a top-view structural schematic diagram of the embedded steel plate.

[0022] Reference numerals: 1 - upper spherical hinge, 2 - lower spherical hinge, 3 - rubber sealing ring, 4 - force-measuring interface, 5 - base, 6 - embedded steel plate, 7 - anchor bolt, 8 - injection flow channel, 9 - pelvic cavity, 10 - pin hole, 11 - positioning pin, 12 - spherical sliding plate, 13 - pressure-sensing element, 14 - grouting hole, 15 - exhaust hole, 16 - convex spherical surface, 17 - concave spherical surface. Specific Embodiments

[0023] The following combines embodiments and the drawings to further elaborate on the present utility model in detail, but the implementation manners of the present utility model are not limited thereto.

[0024] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0025] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "provided with", "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] Embodiment

[0027] A force-measuring swivel ball joint, comprising a base 5, an upper ball joint 1, and a lower ball joint 2 movably connected to the upper ball joint 1. A pelvic cavity 9 is provided on the base 5, and a fluid substance is filled in the pelvic cavity 9. The pelvic cavity 9 is adapted for the lower ball joint 2 to be embedded and the lower ball joint 2 is hermetically connected to the pelvic cavity 9. A force-measuring interface 4 is provided on the side wall of the pelvic cavity 9, and a pressure-sensitive element 13 is hermetically connected to the force-measuring interface 4. Under the action of a vertical force, the lower ball joint 2 squeezes the fluid substance, and the pressure-sensitive element 13 detects the squeezing force received by the fluid substance to obtain the vertical force.

[0028] In this embodiment, as Figure 1As shown, the base 5 serves as the basic part of the entire force-measuring rotating body spherical hinge. A pelvic cavity 9 is provided thereon. The upper spherical hinge 1 is movably connected to the lower spherical hinge 2 and can rotate relative to each other for the rotation of the bridge. The lower spherical hinge 2 is embedded in the pelvic cavity 9 of the base 5. A sealed connection is provided between the lower spherical hinge 2 and the pelvic cavity 9. A fluid substance is filled in the pelvic cavity 9 of the base 5 for transmitting and measuring force. A force-measuring interface 4 is provided on the side wall of the pelvic cavity 9 for connecting a pressure-sensing element 13. The pressure-sensing element 13 is hermetically connected to the force-measuring interface 4 for detecting the extrusion force received by the fluid substance. When a vertical force acts on the lower spherical hinge 2, the lower spherical hinge 2 will extrude the fluid substance in the pelvic cavity 9. After being extruded, the fluid substance will generate a pressure related to the magnitude of the vertical force. This pressure is transmitted to the pressure-sensing element 13 through the force-measuring interface 4. After detecting this pressure, the pressure-sensing element 13 can convert it into an electrical signal or other measurable signals, thereby obtaining the magnitude of the vertical force. During the rotation of the bridge, the actual stress condition of the bridge can be obtained, and it can be known in time whether the bridge is eccentrically loaded, so as to make a correct analysis and judgment on the safety of the bridge.

[0029] Further, the fluid substance is silicone grease, butter or hydraulic oil.

[0030] Specifically, the fluid substance filled in the pelvic cavity 9 is a rigid fluid, preferably silicone grease. In addition, other rigid fluids with similar properties to silicone grease can also be selected as the fluid substance, such as horse oil, butter, hydraulic oil and / or soft rubber, etc. Specifically, the silicone grease is preferably silicone grease with strong lubricating function. Lubricating silicone grease is a translucent paste refined from inorganic thickeners thickening synthetic oil and added with various additives and structure improvers. It can be applied to the lubrication and sealing between metal and metal, metal and plastic moving parts, and can also be used for the lubrication, sealing and insulation of various sliding parts in humid environments. Silicone grease belongs to rigid fluids.

[0031] Further, an injection flow channel 8 communicating with the pelvic cavity 9 is provided on the side wall of the pelvic cavity 9, and the force-measuring interface 4 is arranged at the inlet of the injection flow channel 8.

[0032] Specifically, as Figure 2As shown, the injection channel 8 is opened on the side wall of the pelvic cavity 9 and is connected to the inside of the pelvic cavity 9, and is used to inject or discharge fluid substances into the pelvic cavity 9. The force measuring interface 4 is arranged at the inlet of the injection channel 8, is hermetically connected to the injection channel 8, and is connected with a pressure sensing element 13. In the initial state, the pelvic cavity 9 is filled with an appropriate amount of fluid substance through the injection channel 8. When a vertical force acts on the lower ball joint 2, the lower ball joint 2 will squeeze the fluid substance in the pelvic cavity 9, causing its pressure to increase. The fluid substance with increased pressure flows through the injection channel 8 to the force measuring interface 4, and the pressure sensing element 13 detects this pressure change. The pressure sensing element 13 converts the detected pressure into an electrical signal or other measurable signals, so as to obtain the magnitude of the vertical force. The sealed connections between the lower ball joint 2 and the pelvic cavity 9 and between the injection channel 8 and the force measuring interface 4 ensure the tightness of the system and prevent the leakage of fluid substances. Through the transmission of the fluid substance and the detection of the pressure sensing element 13, the magnitude of the vertical force can be measured more accurately. Through the injection channel 8, fluid substances can be conveniently injected into or discharged from the pelvic cavity 9 to adapt to different working environments or requirements. Due to the movable connection between the upper ball joint 1 and the lower ball joint 2, this force measuring rotary ball joint may have a certain rotation or tilting ability to adapt to different measurement requirements.

[0033] Further, a rubber sealing ring 3 is embedded at the edge where the lower end of the lower ball joint 2 contacts the side wall of the pelvic cavity 9, and the rubber sealing ring 3 is pressed tightly between the side wall of the lower ball joint 2 and the side wall of the pelvic cavity 9.

[0034] Specifically, as Figure 1 shown, a rubber sealing ring 3 is embedded at the edge where the lower end of the lower ball joint 2 contacts the side wall of the pelvic cavity 9. The rubber sealing ring 3 is embedded at the edge where the lower ball joint 2 contacts the side wall of the pelvic cavity 9 and is used to ensure the tightness between the two. The rubber sealing ring 3 is pressed tightly between the side wall of the lower ball joint 2 and the side wall of the pelvic cavity 9 to prevent the leakage of fluid substances. The design of the rubber sealing ring 3 ensures the tight connection between the lower ball joint 2 and the pelvic cavity 9, effectively prevents the leakage of fluid substances, and ensures the stability and accuracy of the system. The rubber sealing ring 3 has good wear resistance and can maintain a stable sealing effect between the lower ball joint 2 and the side wall of the pelvic cavity 9 for a long time. Through the transmission of the fluid substance and the detection of the pressure sensing element 13, combined with the good sealing environment provided by the rubber sealing ring 3, the magnitude of the vertical force can be measured more accurately. When the rubber sealing ring 3 needs to be replaced or repaired, it can be replaced by disassembling the lower ball joint 2, ensuring the maintainability of the system.

[0035] Further, the pressure sensing element 13 is a diffused silicon pressure sensor, a ceramic pressure sensor or a strain gauge, and the pressure sensing elements 13 are distributed in a cross shape around the circumference of the lower ball joint 2.

[0036] Specifically, the pressure-sensitive element 13 can be implemented by selecting various existing commercially available products. The pressure-sensitive element 13 can monitor pressure signals and convert the pressure signals into available output electrical signals according to certain rules. For example: pressure sensors such as MEMS sensors, diffused silicon pressure sensors, ceramic pressure sensors or strain gauges; a pressure sensor can also be selected. In this embodiment, it is preferred that the pressure-sensitive element 13 is a MEMS sensor. A MEMS sensor is a thin film element that deforms when subjected to pressure. A strain gauge (piezoresistive sensing) is provided inside the MEMS sensor to measure this deformation, or the change in the distance between two surfaces can also be measured by capacitive sensing. According to the amount of deformation, the pressure value detected by the MEMS sensor can be deduced. The pressure-sensitive element 13 is distributed in a cross shape in the circumferential direction of the lower ball joint 2 and can measure forces in multiple directions.

[0037] Further, the pressure-sensitive element 13 and the force measuring interface 4 are hermetically connected by means of a threaded fit.

[0038] Specifically, the force measuring interface 4 and the pressure-sensitive element 13 are hermetically connected by means of a threaded fit. Sealing elements such as sealing strips and sealing rings can also be provided at the threaded fit to enhance the sealing effect.

[0039] Further, the bottom surface of the upper ball joint 1 and the top surface of the lower ball joint 2 are in spherical contact. The bottom surface of the upper ball joint 1 is a convex spherical surface 16 that protrudes downward, and the top surface of the lower ball joint 2 is a concave spherical surface 17 that depresses downward. A suitable spherical slide plate 12 is embedded in the top surface of the lower ball joint 2.

[0040] Specifically, the bottom surface of the upper ball joint 1 is designed as a convex spherical surface 16 that protrudes downward, and this convex spherical surface 16 forms spherical contact with the top surface of the lower ball joint 2. The top surface of the lower ball joint 2 is designed as a concave spherical surface 17 that depresses downward and cooperates with the convex spherical surface 16 of the upper ball joint 1 to form spherical contact. A rubber sealing ring 3 is embedded at the edge where the lower end of the lower ball joint 2 contacts the side wall of the pelvic cavity 9 to ensure the sealing between the lower ball joint 2 and the pelvic cavity 9. The spherical slide plate 12 is embedded in the top surface of the lower ball joint 2 and contacts the convex spherical surface 16 of the upper ball joint 1. The spherical slide plate 12 is usually made of wear-resistant and low-friction materials such as stainless steel or polymer materials and is used to provide smooth spherical sliding between the upper ball joint 1 and the lower ball joint 2. When an external force acts, relative movement will occur between the upper ball joint 1 and the lower ball joint 2. Due to the spherical contact design, this movement can be multi-directional, including rotation and tilting. The presence of the spherical slide plate 12 reduces the friction between the upper ball joint 1 and the lower ball joint 2, making this movement smoother, and thus the rotation of the bridge during the rotation process is also smoother.

[0041] Further, a positioning pin 11 that protrudes upward is provided at the center position of the top surface of the lower ball joint 2, and a pin hole 10 that depresses upward and is adapted to the positioning pin 11 is provided at the center of the bottom surface of the upper ball joint 1. The positioning pin 11 and the pin hole 10 are rotationally matched.

[0042] Specifically, as Figure 1 shown, the positioning pin 11 of the lower ball joint 2 forms a rotational fit with the pin hole 10 of the upper ball joint 1. This type of fit allows the upper ball joint 1 to maintain a stable central position relative to the lower ball joint 2, ensuring that the relative movement between the upper ball joint 1 and the lower ball joint 2 occurs along a predetermined central axis. This improves the stability and accuracy of rotation, reduces performance degradation and damage caused by friction and wear, extends the service life. The materials of the positioning pin 11 and the pin hole 10 should have sufficient strength and wear resistance to ensure the stability and reliability during long-term use. The fit tolerance between the positioning pin 11 and the pin hole 10 should be controlled within a reasonable range, ensuring both smooth rotation and avoiding instability caused by excessive clearance. An appropriate lubrication structure or lubricant can be designed between the positioning pin 11 and the pin hole 10 to reduce the frictional resistance and improve the smoothness of rotation. The design of the positioning and rotational fit between the lower ball joint 2 and the upper ball joint 1 in the force-measuring rotating ball joint enables multi-directional rotation while maintaining a stable central position through the precise fit of the positioning pin 11 and the pin hole 10. This design not only improves the stability and accuracy of rotation but also extends the service life, providing strong guarantee for the performance of the force-measuring rotating ball joint.

[0043] Furthermore, the upper ball joint 1 is fixedly connected to the beam body through the anchor bolts 7. The bottom surface of the base 5 is provided with a pre-embedded steel plate 6, which is pre-fixed inside the pier column. The base 5, the pre-embedded steel plate 6, and the pier column are fixedly connected through the anchor bolts 7.

[0044] Specifically, the upper ball joint 1 is fixedly connected to the beam body through the anchor bolts 7. Using the anchor bolts 7 for connection can ensure a tight connection between the upper ball joint 1 and the beam body, while allowing disassembly and reinstallation when needed. The bottom surface of the base 5 is provided with a pre-embedded steel plate 6, which is pre-fixed inside the pier column. The base 5, the pre-embedded steel plate 6, and the pier column are fixedly connected through the anchor bolts 7. The use of the pre-embedded steel plate 6 can ensure a more firm and stable connection between the base 5 and the pier column. The anchor bolts 7 and the pre-embedded steel plate 6 should be made of high-strength and corrosion-resistant materials to ensure the stability and durability of the connection. During the installation process, the position and angle of the pre-embedded steel plate 6 should be ensured to be accurate without error to ensure the connection quality between the base 5 and the pier column. Regularly check and maintain the connection part to ensure that the fastening state of the anchor bolts 7 is good and there is no rust and damage on the pre-embedded steel plate 6. The force-measuring rotating ball joint is fixedly connected to the beam body and the pier column through the anchor bolts 7, ensuring the stability and reliability of the structure. The use of the pre-embedded steel plate 6 further enhances the connection strength between the base 5 and the pier column, improving the load-bearing capacity and safety of the entire structure.

[0045] Furthermore, the top surface of the embedded steel plate 6 has several rectangular grids, and a grouting hole 14 adapted to the anchor bolt 7 is provided in the middle of each rectangular grid. The grouting hole 14 is circumferentially distributed with exhaust holes 15.

[0046] Specifically, as Figure 3 shown, the top surface of the embedded steel plate 6 is designed with several rectangular grids, and these grids are distributed on the steel plate in a matrix arrangement. The size and quantity of each rectangular grid are determined according to specific engineering requirements to ensure that the steel plate can bear the expected load. A grouting hole 14 adapted to the anchor bolt 7 is provided in the middle of each rectangular grid. The size and depth of the grouting hole 14 should be able to meet the requirements of inserting the anchor bolt 7 and grouting. The specific size and quantity of the grouting hole 14 need to be determined according to the engineering design and the specification of the anchor bolt 7. The exhaust holes 15 are circumferentially distributed around the grouting hole 14. This distribution method can ensure that during the grouting process, gas can smoothly discharge from the exhaust holes 15, avoiding the formation of bubbles or voids around the grouting hole 14. The size (such as diameter or width) of the exhaust holes 15 should be determined according to the grouting speed and the properties of the concrete to ensure that the gas can be discharged smoothly. The quantity of the exhaust holes 15 should be determined according to the size of the rectangular grid and the quantity of the grouting holes 14 to ensure that there are sufficient exhaust holes 15 around each grouting hole 14. The main function of the exhaust holes 15 is to prevent the formation of voids or bubbles due to the inability of the gas in the concrete to discharge during the grouting process. These voids or bubbles may affect the strength and stability of the structure. Therefore, it is very necessary to set the exhaust holes 15. The embedded steel plate 6 can better meet the engineering requirements. The rectangular grids provide fixed positions and spaces, facilitating the installation and fixation of the anchor bolts 7; the grouting holes 14 ensure the smooth progress of grouting; and the exhaust holes 15 effectively prevent the possible problems of voids or bubbles during the grouting process. This design not only improves the stability and safety of the structure but also facilitates the operation and management during the construction process.

[0047] The above are only the preferred embodiments of the present invention and do not impose any form of limitation on the present invention. Based on the technical essence of the present invention, any simple modifications, equivalent replacements, and improvements made to the above embodiments within the spirit and principles of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A force-measuring swivel ball joint, comprising a base (5), an upper ball joint (1) and a lower ball joint (2) movably connected to the upper ball joint (1), characterized in that, The base (5) is provided with a pelvic cavity (9), which is filled with a fluid substance. The pelvic cavity (9) is suitable for the lower ball joint (2) to be embedded therein, and the lower ball joint (2) is sealedly connected to the pelvic cavity (9). A force measuring interface (4) is provided on the side wall of the pelvic cavity (9), and the force measuring interface (4) is sealedly connected to a pressure sensing element (13). Under the action of a vertical force, the lower ball joint (2) squeezes the fluid substance, and the pressure sensing element (13) detects the squeezing force exerted on the fluid substance to obtain the vertical force.

2. The force-measuring swivel ball hinge according to claim 1, characterized in that, The fluid substance is silicone grease, butter or hydraulic oil.

3. The force-measuring swivel ball hinge according to claim 1, characterized in that, The side wall of the pelvic cavity (9) is provided with an injection channel (8) connected to the pelvic cavity (9), and the force measuring interface (4) is arranged at the inlet of the injection channel (8).

4. A force-measuring swivel ball joint according to claim 1, characterized in that, A rubber sealing ring (3) is embedded at the edge where the lower end of the lower ball joint (2) contacts the side wall of the pelvic cavity (9), and the rubber sealing ring (3) is pressed tightly between the side wall of the lower ball joint (2) and the side wall of the pelvic cavity (9).

5. A force-measuring swivel ball joint according to claim 1, characterized in that, The pressure-sensitive element (13) is a diffused silicon pressure sensor, a ceramic pressure sensor or a stress sheet, and the pressure-sensitive element (13) is distributed in a cross shape in the circumferential direction of the lower ball joint (2).

6. The force-measuring swivel ball hinge according to claim 1, characterized in that The pressure sensing element (13) and the force measuring interface (4) are sealed and connected by means of threaded engagement.

7. The force-measuring swivel ball hinge according to claim 1, characterized in that, The bottom surface of the upper ball joint (1) and the top surface of the lower ball joint (2) are in spherical contact. The bottom surface of the upper ball joint (1) is a convex spherical surface (16) protruding downward, and the top surface of the lower ball joint (2) is a concave spherical surface (17) recessed downward. The top surface of the lower ball joint (2) is embedded with an adaptive spherical slide plate (12).

8. The force-measuring swivel ball hinge according to claim 7, characterized in that, A positioning pin (11) protruding upward is provided at the center of the top surface of the lower ball joint (2), and a pin hole (10) recessed upward and adapted to the positioning pin (11) is provided at the center of the bottom surface of the upper ball joint (1), and the positioning pin (11) and the pin hole (10) are rotatably matched.

9. A force-measuring swivel ball joint according to claim 1, characterized in that The upper ball joint (1) is fixedly connected to the beam body by means of anchor bolts (7); the bottom surface of the base (5) is provided with an embedded steel plate (6); the embedded steel plate (6) is pre-fixed inside the pier column; the base (5), the embedded steel plate (6) and the pier column are fixedly connected by means of anchor bolts (7).

10. A force-measuring swivel ball joint according to claim 9, characterized in that, The top surface of the embedded steel plate (6) has a plurality of rectangular grids, each rectangular grid has a grouting hole (14) adapted to the anchor bolt (7) in the middle, and exhaust holes (15) are distributed around the grouting hole (14).

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