Bridge bearing upper and lower seat plate quick centering structure with a guide pin

Abstract

The utility model discloses a bridge support upper and lower seat plate quick centering structure with a pin, including the upper plate seat, the lower plate seat, the core force transmission mechanism, the centering subassembly, be provided with the core force transmission mechanism between the upper plate seat and the lower plate seat, and the periphery of core force transmission mechanism is provided with the centering subassembly. The utility model aims at providing a bridge support centering structure convenient operation, high accuracy, stable and reliable.

Description

Technical Field

[0001] This utility model relates to the field of bridge bearing technology, specifically a bridge bearing upper and lower bearing plates with a directional pin for quick centering. Background Technology

[0002] As a critical force-transmitting component connecting the superstructure and substructure of a bridge, the installation accuracy of bridge bearings directly affects the overall load-bearing performance and service life of the bridge. Ensuring precise alignment of the upper and lower bearing plates is a crucial step in the bearing installation process. Traditional alignment methods typically rely on manual measurement, temporary supports, or simple positioning devices, resulting in low efficiency, high susceptibility to human error, and cumbersome operations. This is especially true for heavy or long-span bridge bearings, where the large size and weight of the upper and lower bearing plates make fine-tuning difficult and hinders the rapid achievement of high-precision center alignment. Inaccurate alignment can lead to localized stress concentration in the bearings, affecting their normal functions such as rotation and sliding, and even posing a potential risk to the structural safety of the bridge.

[0003] Therefore, there is an urgent need in this field for an alignment structure that can achieve rapid and accurate alignment of the upper and lower bearing plates of bridge bearings, and is easy to operate and highly reliable, in order to overcome the shortcomings of the existing technology. Utility Model Content

[0004] In view of the above-mentioned shortcomings in the existing technology, the purpose of this utility model is to provide a bridge bearing centering structure that is easy to operate, highly accurate, stable and reliable.

[0005] The technical solution adopted by this utility model to achieve the above objectives is: a bridge bearing upper and lower seat plate quick centering structure with a directional pin, including an upper seat plate, a lower seat plate, a core force transmission mechanism, and a centering component. The core force transmission mechanism is provided between the upper seat plate and the lower seat plate. The upper seat plate and the lower seat plate are used for top and bottom support installation, respectively. The upper seat plate is used for connection of the bridge superstructure, and the lower seat plate is used for connection of the bridge substructure (such as piers). The core force transmission structure is located at the center of the bearing, bearing and transmitting the main load of the bridge, while allowing a certain rotational displacement. The centering component is provided on the outer periphery of the core force transmission mechanism to be responsible for the quick centering and positioning of the upper seat plate and the lower seat plate. The centering assembly includes locking blocks, guide pins, a transmission assembly, guide rails, sliding blocks, and docking plates. Two sets of symmetrical locking blocks are arranged on the outer periphery of the core force transmission mechanism. Each locking block has two sets of symmetrical sliding cavities. Each sliding cavity has a through hole at its upper end leading to the outside. A sliding block is slidably connected within each sliding cavity. A guide pin is fixedly connected to the upper end of each sliding block, and the upper end of the guide pin extends through the through hole to the top of the locking block. Guide holes are respectively formed at the four corners of the upper plate base, and the guide pins are respectively inserted into these guide holes. Both the sliding blocks and guide pins are connected to the transmission assembly. Sliding blocks are fixedly connected to both sides of each locking block. A sliding groove is formed at the lower end of each sliding block, and a guide rail is slidably connected within the sliding groove. The guide rails are fixedly connected to both sides of the lower plate base, and a docking plate is fixedly connected to one end of each guide rail. One side of the docking plate is fixedly connected to the locking block. The docking plates between the two sets of locking blocks are fastened together with bolts and nuts. In operation, the two sets of locking blocks are first installed together on the upper end of the lower plate seat via the guide rail. The small-diameter circular hole of the mounting hole and the outer wall of the inner sleeve are nested together to limit the relative position of the locking blocks. Then, the upper plate seat and the lower plate seat are aligned and installed. During this process, the outer sleeve at the lower end of the upper plate seat is aligned with the large-diameter circular hole of the mounting hole and inserted downwards along the mounting hole. The outer edge of the lower end of the outer sleeve is chamfered, and the upper edge of the large-diameter circular hole is also chamfered to guide the insertion of the outer sleeve. The outer diameter of the outer sleeve is smaller than the inner diameter of the largest circular hole of the mounting hole. Then, the guide holes at the four corners of the upper plate seat correspond to the conical blocks at the upper end of the guide pin, and the guide pin is inserted into the guide hole, thereby further realizing the alignment and installation of the upper plate seat and the lower plate seat. After the upper plate seat and the lower plate seat are aligned and installed, the transmission component drives the guide pin and the sliding block to retract into the sliding cavity, that is, the guide pin disengages from the guide hole of the upper plate seat. Then, the two sets of locking blocks can be removed.

[0006] In the above technical solution, the core force transmission mechanism includes an inner sleeve, an outer sleeve, a support column, a rubber plate, and a polytetrafluoroethylene (PTFE) plate. The inner sleeve is fixedly connected to the upper middle part of the lower plate seat. The support column is provided inside the inner sleeve. The outer sleeve is slidably connected to the upper end of the inner sleeve. A gap is left between the inner wall of the outer sleeve and the outer wall of the inner sleeve. The upper end of the outer sleeve is fixedly connected to the lower middle part of the upper plate seat. The rubber plate is provided inside the outer sleeve. The upper end of the rubber plate is fixedly connected to the upper plate seat. The lower end of the rubber plate has a spherical structure. The upper end of the support column matches the spherical structure of the rubber plate. A PTFE plate is provided between the support column and the rubber plate.

[0007] In the above technical solution, an installation hole is provided between the two sets of locking blocks. One end of the installation hole is a small-diameter circular hole, and the other end is a large-diameter circular hole. The lower end of the inner sleeve is fitted into the small-diameter circular hole, and the outer sleeve is fitted into the large-diameter circular hole.

[0008] In the above technical solution, the transmission assembly includes a threaded rod, a first bevel gear, a second bevel gear, a rotating shaft, a worm gear, a worm, and an internal hexagonal socket head cap. The first bevel gear is rotatably connected to the locking block below the sliding cavity. The threaded rod is fixedly connected to the center of the first bevel gear. One end of the threaded rod passes through and is rotatably connected to the sliding cavity. The sliding block and the guide pin are respectively provided with threaded holes. The threaded rod is threadedly connected to the threaded holes. The first bevel gear is meshed with the second bevel gear. The second bevel gear is fixedly connected to both ends of the rotating shaft. The worm gear is fixedly connected to the middle of the rotating shaft. The upper end of the worm gear is meshed with the worm. One end of the worm passes through the locking block and is fixedly connected to the internal hexagonal socket head cap. The second bevel gear, the rotating shaft, the worm gear, and the worm are all rotatably connected to the locking block.

[0009] In the above technical solution, fixed pin holes are respectively opened on the sliding blocks on both sides of the threaded hole, and a pin hole is opened in the locking block opposite to the fixed pin hole. One end of the pin hole is connected to the outer wall of the locking block, and a fixing pin is inserted into the pin hole, and the fixing pin passes through the fixed pin hole.

[0010] The beneficial effects of this utility model are: 1. This utility model, through the precise cooperation between the liftable guide pin and the guide hole of the upper plate seat, can quickly guide and realize the automatic alignment of the upper and lower plate seats, significantly reducing the difficulty and time of traditional manual adjustment, effectively improving the accuracy and efficiency of support installation, and overcoming the problem of difficult alignment of heavy components.

[0011] 2. The centering component adopts a modular design. After centering and positioning are completed, the guide pin can be retracted and the entire centering component can be removed from the support. It does not participate in the long-term stress of the bridge, which not only ensures that the performance of the core force transmission component of the support is not affected during the operation phase, but also realizes the reuse of installation tools, which is economical.

[0012] 3. The guide pin is driven to rise and fall by a transmission assembly consisting of a worm gear and a bevel gear. It has a large transmission ratio and good self-locking performance. It can not only control the guide pin stroke with ease, but also ensure that it remains in a stable extended state during operation, effectively bear external loads, prevent accidental retraction, and ensure safe and reliable operation.

[0013] 4. The sliding fit between the guide rail and the slide block, combined with the engagement and positioning of the locking block and the core force transmission component, ensures the accuracy of the installation position of the centering component on the lower plate seat, laying a reliable foundation for the precise centering of the upper plate seat and forming a multi-level positioning guarantee system.

[0014] 5. While achieving rapid alignment, the core force transmission mechanism of this structure retains the spherical rotation and sliding functions, fully possessing the bearing, rotation and displacement performance that a support should have. The alignment process does not affect the mechanical properties of the support itself, ensuring the long-term safety and stability of bridge operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model; Figure 2 This is a schematic diagram of the disassembled centering component of this utility model; Figure 3 This is a schematic diagram of the cross-sectional connection structure of the core force transmission mechanism of this utility model; Figure 4 This is a schematic diagram of the cross-sectional connection structure of the snap-fit ​​block of this utility model; Figure 5 for Figure 4 Detailed structural diagram of part A1.

[0016] In the diagram: 1 Upper plate base, 2 Lower plate base, 3 Core force transmission mechanism, 4 Centering component, 101 Clamping block, 102 Guide pin, 103 Transmission component, 104 Guide rail, 105 Sliding block, 106 Connecting plate, 107 Sliding cavity, 108 Through hole, 109 Sliding block, 110 Guide hole, 111 Sliding groove, 112 Mounting hole, 201 Inner sleeve, 202 Outer sleeve, 203 Support column, 204 Rubber plate, 205 Polytetrafluoroethylene plate, 301 Threaded rod, 302 First bevel gear, 303 Second bevel gear, 304 Rotating shaft, 305 Worm gear, 306 Worm, 307 Socket head cap, 308 Threaded hole, 309 Fixed pin hole, 310 Insertion pin hole, 311 Fixed pin. Detailed Implementation

[0017] 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.

[0018] Please see Figure 1-5A bridge bearing with a directional pin and a quick centering structure for the upper and lower bearing plates includes an upper bearing plate 1, a lower bearing plate 2, a core force transmission mechanism 3, and a centering component 4. The core force transmission mechanism 3 is provided between the upper bearing plate 1 and the lower bearing plate 2. The upper bearing plate 1 and the lower bearing plate 2 are used for top and bottom support installation, respectively. The upper bearing plate 1 is used for connection to the superstructure of the bridge, and the lower bearing plate 2 is used for connection to the substructure of the bridge (such as piers). The core force transmission structure is located at the center of the bearing and bears and transmits the main load of the bridge while allowing a certain rotational displacement. The centering component 4 is provided on the outer periphery of the core force transmission mechanism 3 to be responsible for the quick centering and positioning of the upper bearing plate 1 and the lower bearing plate 2. The centering component 4 includes a locking block 101, a guide pin 102, a transmission component 103, a guide rail 104, a sliding block 105, and a docking plate 106. Two sets of symmetrical locking blocks 101 are arranged on the outer periphery of the core force transmission mechanism 3. Two sets of symmetrical sliding cavities 107 are formed within each locking block 101. A through hole 108 leading to the outside is formed at the upper end of each sliding cavity 107. A sliding block 109 is slidably connected within each sliding cavity 107. A guide pin 102 is fixedly connected to the upper end of each sliding block 109. The upper end of the guide pin 102 passes through the through hole 108 to the top of the locking block 101. Guide holes 110 are formed at the four corner edges of the upper plate seat 1, and the guide pin 102 is inserted into each guide hole 110. Both 09 and guide pin 102 are connected to the transmission assembly 103. Sliding blocks 105 are fixedly connected to both sides of the engaging block 101. A sliding groove 111 is provided at the lower end of each sliding block 105. A guide rail 104 is slidably connected within the sliding groove 111. The guide rails 104 are fixedly connected to both sides of the lower plate seat 2. A mating plate 106 is fixedly connected to one end of each guide rail 104. One side of the mating plate 106 is fixedly connected to the engaging block 101. The mating plates 106 between the two sets of engaging blocks 101 are fastened together by bolts and nuts. An installation hole 112 is provided between the two sets of engaging blocks 101. One end of the installation hole 112 is a small-diameter circular hole, and the other end is a large-diameter circular hole. The lower end of the inner sleeve 201 is embedded... The upper plate 1 and lower plate 2 are connected in a small-diameter circular hole, while the outer sleeve 202 is fitted into a large-diameter circular hole. In use, the two sets of locking blocks 101 are first installed together on the upper end of the lower plate 2 via the guide rail 104, and then fixed with bolts and nuts. During this process, the small-diameter circular hole of the mounting hole 112 and the outer wall of the inner sleeve 201 are nested together, thus limiting the relative position of the locking blocks 101. Then, the upper plate 1 and lower plate 2 are aligned and installed. During this process, the outer sleeve 202 at the lower end of the upper plate 1 is aligned with the large-diameter circular hole of the mounting hole 112 and inserted downwards along the mounting hole 112. The outer edge of the lower end of the outer sleeve 202 is chamfered. The upper edge of the large-diameter circular hole is also chamfered to guide the insertion of the outer sleeve 202. The outer diameter of the outer sleeve 202 is smaller than the inner diameter of the largest circular hole of the mounting hole 112. Then, the guide holes 110 at the four corners of the upper plate seat 1 correspond to the tapered blocks at the upper end of the guide pin 102, and the guide pin 102 is inserted into the guide hole 110, thereby further realizing the centering and installation of the upper plate seat 1 and the lower plate seat 2. After the upper plate seat 1 and the lower plate seat 2 are centered and installed, the guide pin 102 and the sliding block 109 are driven to retract into the sliding cavity 107 by the transmission component 103, that is, the guide pin 102 is disengaged from the guide hole 110 of the upper plate seat 1. Then, the two sets of locking blocks 101 can be removed.

[0019] The core force transmission mechanism 3 includes an inner sleeve 201, an outer sleeve 202, a support column 203, a rubber plate 204, and a polytetrafluoroethylene (PTFE) plate 205. The inner sleeve 201 is fixedly connected to the upper middle part of the lower plate seat 2. The support column 203 is installed inside the inner sleeve 201. The outer sleeve 202 is slidably connected to the upper end of the inner sleeve 201. A gap is left between the inner wall of the outer sleeve 202 and the outer wall of the inner sleeve 201 to allow for slight rotation between the upper plate seat 1 and the lower plate seat 2. The upper end of the outer sleeve 202 is fixedly connected to the lower middle part of the upper plate seat 1. The rubber plate 204 is installed inside the outer sleeve 202. The upper end of the 04 plate is fixedly connected to the upper plate seat 1. The lower end of the rubber plate 204 has a spherical structure. The upper end of the support column 203 matches the spherical structure of the rubber plate 204. A polytetrafluoroethylene (PTFE) plate 205 is installed between the support column 203 and the rubber plate 204. During the load-bearing process of the bridge, the load is transferred from the upper plate seat 1 to the rubber plate 204 and the PTFE plate 205, and finally to the pier through the support column 203 and the lower plate seat 2. The spherical structure at the lower end of the rubber plate 204 and the matching spherical surface at the upper end of the support column 203, with the low-friction coefficient PTFE plate 205 sandwiched in between, form a spherical bearing. This allows the upper plate seat 1 to rotate slightly relative to the lower plate seat 2 to adapt to the bending deformation of the beam. The inner sleeve 201 is connected inside the outer sleeve 202, which not only prevents the inner and outer sleeves 202 from separating, but also improves the lateral stability of the support, while preventing external dust and other impurities from entering the rubber plate 204 and the support column 203.

[0020] The transmission assembly 103 includes a threaded rod 301, a first bevel gear 302, a second bevel gear 303, a rotating shaft 304, a worm gear 305, a worm 306, and an internal hexagonal socket head cap 307. The first bevel gear 302 is rotatably connected to the engaging block 101 below the sliding cavity 107. The threaded rod 301 is fixedly connected to the center of the first bevel gear 302. One end of the threaded rod 301 passes through and is rotatably connected to the sliding cavity 107. The sliding block 109 and the guide pin 102 are respectively provided with threaded holes 308, and the threaded rod 301 is threadedly connected to the threaded holes 308. The first bevel gear 302 is meshed with the second bevel gear 303, which is fixedly connected to both ends of the rotating shaft 304. The worm gear 305 is fixedly connected to the middle of the rotating shaft 304, and the worm 306 is meshed with the upper end of the worm gear 305. One end of the locking block 101 extends out and is fixedly connected to the internal hexagonal head 307. The second bevel gear 303, rotating shaft 304, worm gear 305, and worm 306 are all rotatably connected inside the locking block 101. In use, the internal hexagonal head 307 is rotated with a tool, which drives the worm 306 to rotate. The worm 306 drives the worm gear 305 to rotate, and the worm gear 305 drives the rotating shaft 304 to rotate. The rotating shaft 304 simultaneously drives the second bevel gears 303 at both ends to rotate. The second bevel gears 303 drive the first bevel gear 302 to rotate, and the first bevel gear 302 drives the threaded rod 301 to rotate. The threaded rod 301 drives the sliding block 109 and the guide pin 102 to move up and down along the threaded rod 301 through the thread, so that the guide pin 102 can extend out of the locking block 101 or retract into the sliding cavity 107 along the through hole 108.

[0021] The sliding blocks 109 on both sides of the threaded hole 308 are respectively provided with fixed pin holes 309. The locking block 101 opposite to the fixed pin holes 309 is provided with a pin hole 310. One end of the pin hole 310 is connected to the outer wall of the locking block 101. A fixing pin 311 is inserted into the pin hole 310 and the fixing pin 311 passes through the fixed pin hole 309. After the guide pin 102 extends out of the locking block 101, the fixing pin 311 is inserted into the pin hole 310 and the fixed pin hole 309 respectively, which can reduce the influence of external force on the threaded rod 301 of the guide pin 102.

[0022] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0023] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A bridge bearing upper and lower seat plate quick centering structure with a guide pin, comprising an upper seat plate (1), a lower seat plate (2), a core force transmission mechanism (3), and a centering assembly (4), characterized in that: A core force transmission mechanism (3) is provided between the upper plate seat (1) and the lower plate seat (2). A centering component (4) is provided on the outer periphery of the core force transmission mechanism (3). The centering component (4) includes a locking block (101), a guide pin (102), a transmission component (103), a guide rail (104), a sliding block (105), and a docking plate (106). Two sets of symmetrical locking blocks (101) are provided on the outer periphery of the core force transmission mechanism (3). Two sets of symmetrical sliding cavities (107) are opened in the locking blocks (101). A through hole (108) is opened at the upper end of the sliding cavity (107) leading to the outside. A sliding block (109) is slidably connected in the sliding cavity (107). A guide pin (102) is fixedly connected to the upper end of the sliding block (109). The upper end of the guide pin (102) passes through the through hole (108) to the locking block (109). 101) At the top, the four corner edges of the upper plate seat (1) are respectively provided with guide holes (110), and the guide pins (102) are respectively inserted into the guide holes (110). The sliding block (109) and the guide pins (102) are both connected to the transmission assembly (103). The two sides of the locking block (101) are respectively fixedly connected with sliding blocks (105). The lower end of the sliding block (105) is provided with a sliding groove (111). The sliding groove (111) is slidably connected with a guide rail (104). The guide rails (104) are respectively fixedly connected to the two sides of the lower plate seat (2). One end of the guide rail (104) is fixedly connected with a docking plate (106). One side of the docking plate (106) is fixedly connected to the locking block (101). The docking plates (106) between the two sets of locking blocks (101) are respectively fastened by bolts and nuts.

2. The bridge bearing upper and lower seat plates with directional pins according to claim 1, characterized in that: The core force transmission mechanism (3) includes an inner sleeve (201), an outer sleeve (202), a support column (203), a rubber plate (204), and a polytetrafluoroethylene plate (205). The inner sleeve (201) is fixedly connected to the middle of the upper end of the lower plate seat (2). The support column (203) is provided inside the inner sleeve (201). The outer sleeve (202) is slidably connected to the upper end of the inner sleeve (201). There is a gap between the inner wall of the outer sleeve (202) and the outer wall of the inner sleeve (201). There is a gap. The upper end of the outer sleeve (202) is fixedly connected to the middle of the lower end of the upper plate seat (1). A rubber plate (204) is provided inside the outer sleeve (202). The upper end of the rubber plate (204) is fixedly connected to the upper plate seat (1). The lower end of the rubber plate (204) is a spherical structure. The upper end of the support column (203) matches the spherical structure of the rubber plate (204). A polytetrafluoroethylene plate (205) is provided between the support column (203) and the rubber plate (204).

3. The bridge bearing upper and lower seat plates with directional pins according to claim 2, characterized in that: An installation hole (112) is provided between the two sets of locking blocks (101). One end of the installation hole (112) is a small-diameter circular hole, and the other end is a large-diameter circular hole. The lower end of the inner sleeve (201) is fitted into the small-diameter circular hole, and the outer sleeve (202) is fitted into the large-diameter circular hole.

4. The bridge bearing upper and lower seat plates with directional pins according to claim 1, characterized in that: The transmission assembly (103) includes a threaded rod (301), a first bevel gear (302), a second bevel gear (303), a rotating shaft (304), a worm gear (305), a worm (306), and an internal hexagonal bolt (307). The first bevel gear (302) is rotatably connected to the locking block (101) below the sliding cavity (107). The threaded rod (301) is fixedly connected to the center of the first bevel gear (302). One end of the threaded rod (301) passes through and is rotatably connected to the sliding cavity (107). The sliding block (109) and the guide pin (102) are respectively provided with threaded holes (308). 301) The threaded connection is in the threaded hole (308). The first bevel gear (302) is meshed with the second bevel gear (303). The second bevel gear (303) is fixedly connected to both ends of the rotating shaft (304). The rotating shaft (304) is fixedly connected to the middle part of the rotating shaft (304). The upper end of the worm gear (305) is meshed with the worm (306). One end of the worm (306) passes through the locking block (101) and is fixedly connected to the internal hexagonal bolt head (307). The second bevel gear (303), the rotating shaft (304), the worm gear (305), and the worm (306) are all rotatably connected in the locking block (101).

5. The bridge bearing upper and lower seat plates quick-alignment structure with directional pins according to claim 4, characterized in that: The sliding blocks (109) on both sides of the threaded hole (308) are respectively provided with fixed pin holes (309). The locking block (101) opposite to the fixed pin holes (309) is provided with a pin hole (310). One end of the pin hole (310) is connected to the outer wall of the locking block (101). A fixing pin (311) is inserted into the pin hole (310) and the fixing pin (311) is connected through the fixed pin hole (309).

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