Cast steel trestle hinged support based on arc-shaped groove-half shaft cooperation

Abstract

The utility model discloses cast steel trestle hinged support based on arc -shaped groove -half axle cooperation relates to the technical field of fabricated steel structure trestle, including upper support and lower support, the upper support is opposite distribution with lower support, the upper support includes upper roof, and the bottom fixedly connected with upper support of upper roof has, and the bottom of upper support is provided with arc groove, and arc groove is along the width direction distribution of upper roof, the lower support includes lower bottom plate, and the top fixedly connected with lower axle support of lower bottom plate, and the upper half of lower axle support is semicircle, and with arc groove is pasted together, one end fixedly connected with the fixed sealing plate of arc groove, and the fixed flange is fixedly connected on the fixed sealing plate, and the side sealing plate is arranged to the side of fixed sealing plate of lower axle support back to the fixed sealing plate. This cast steel trestle hinged support based on arc -shaped groove -half axle cooperation utilizes the precision cooperation of upper support, arc groove and lower axle support, realizes smooth rotation around the shaft and strictly restricts longitudinal and transverse translation displacement when reliable bearing, ensures the stability of structure.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated steel structure trestle technology, and in particular to a cast steel trestle articulated support based on arc groove-half shaft fit. Background Technology

[0002] Currently, traditional pin-type hinged supports are commonly used in prefabricated trestle structures to achieve the rotation function of the nodes. This structure consists of upper and lower support lugs with shaft holes and independent pins. However, this traditional structure has a series of inherent defects in practical applications:

[0003] Firstly, the mating interface between the pin and the shaft hole is mostly an open design, and the opening is often facing upwards. This makes it easy for dust, mud, rainwater and other impurities to penetrate and accumulate in the key friction pair in the dusty industrial environment, causing the pin to rust and increase rotational resistance. After long-term use, it may cause rotational jamming or even failure. Moreover, working at height makes cleaning and maintenance extremely difficult.

[0004] Secondly, in order to ensure assemblability and rotational capability, there must be a clearance between the pin and the shaft hole. However, this causes the support to experience unexpected longitudinal or lateral slight movement under complex dynamic loads, in addition to the designed rotation. This affects the structural positioning accuracy and introduces secondary stress, threatening the overall stability.

[0005] Third, the structure exhibits significant stress concentration in the heat-affected zone of the weld between the ear plate and the base plate, as well as in the concentrated stress area of ​​the pin shaft against the ear plate hole wall. Under repeated cyclic loading, this can easily become the origin of fatigue crack initiation, thus restricting the long-term durability and safety reliability of the support.

[0006] Fourth, its installation requires precise hole alignment at high altitudes to allow the pin to pass through, which makes construction difficult and inefficient. Furthermore, it is almost impossible to replace worn or damaged parts later, resulting in poor maintainability.

[0007] Therefore, it is necessary to propose a cast steel trestle articulated support based on the arc groove-half shaft fit to solve the above problems. Utility Model Content

[0008] The purpose of this invention is to provide a cast steel trestle hinge support based on an arc groove-half shaft fit, in order to solve the problem that the traditional pin-type hinge support is commonly used in prefabricated trestle structures to realize the rotation function of the nodes. This structure consists of upper and lower support ear plates with shaft holes and independent pins.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a cast steel trestle hinge support based on an arc groove-half shaft fit, comprising an upper support and a lower support, wherein the upper support and the lower support are distributed opposite to each other;

[0010] The upper support includes an upper top plate, and an upper support is fixedly connected to the bottom of the upper top plate. An arc groove is provided at the bottom end of the upper support, and the arc groove is distributed along the width direction of the upper top plate.

[0011] The lower support includes a lower base plate, and a lower shaft support is fixedly connected to the top of the lower base plate. The upper half of the lower shaft support is semi-circular and fits into the arc groove.

[0012] One end of the arc groove is fixedly connected to a fixed sealing plate, and a fixed flange is fixedly connected to the fixed sealing plate. A side sealing plate is provided on the side of the lower shaft support facing away from the fixed sealing plate, and a side flange is fixedly connected to the side sealing plate. Both the fixed flange and the side flange are arc-shaped. Both ends of the lower shaft support are provided with slots for the fixed flange or the side flange to slide.

[0013] The side sealing plate is installed on the upper support by a fastening assembly.

[0014] Preferably, the fastening assembly includes a pre-drilled hole, a bolt, and a blind hole. The pre-drilled hole is formed through the side sealing plate, the blind hole is formed on the side wall of the upper support, and the bolt passes through the pre-drilled hole and engages with the blind hole.

[0015] Preferably, longitudinal ribs are fixedly connected to both sides of the upper support, and the longitudinal ribs are fixedly connected to the upper top plate. The height of the longitudinal ribs gradually decreases in the direction away from the upper support.

[0016] Preferably, a transverse rib is fixedly connected to the longitudinal rib, the transverse rib is fixedly connected to the upper top plate, and multiple transverse ribs are provided, which are evenly distributed.

[0017] Preferably, the arc length of the groove is greater than the arc length of the fixed flange or the side flange.

[0018] Preferably, the upper top plate has several threaded grooves.

[0019] The technical effects and advantages of this utility model are as follows:

[0020] 1. This utility model utilizes the precise fit between the upper support, the arc groove, and the lower shaft support to achieve smooth rotation around the shaft while strictly limiting longitudinal and lateral translational displacement, thus ensuring the stability of the structure.

[0021] 2. The unique downward-facing arc groove design of this utility model fundamentally avoids the problem of rotation jamming caused by dust accumulation, and significantly improves the reliability and durability of long-term use;

[0022] 3. Both the upper and lower supports of this utility model are made using an integral casting process. Combined with the rounded corners of key parts of the lower support, stress concentration is effectively avoided, and the overall structure and mechanical properties are enhanced.

[0023] 4. This utility model adopts a clever structure with a fixed sealing plate on one side and a detachable side sealing plate on the other side, which makes the installation and assembly process extremely simple and efficient, and facilitates subsequent maintenance and inspection, thus combining functionality with the convenience of construction and maintenance.

[0024] 5. This utility model achieves rotation function through a unique "arc groove-half shaft" cooperation mechanism, restricts lateral displacement through the "flange-groove" cooperation on both sides, and ensures the strength and rigidity of the structure through the design of longitudinal and transverse ribs.

[0025] 6. The "convex-concave interlocking" structure of the fixed flange, side flange and groove forms a longitudinal rigid constraint. The difference between the arc length of the groove and the arc length of the flange is precisely matched with the rotation angle of the support design, which not only meets the rotation requirements of the trestle due to temperature changes or load, but also completely eliminates longitudinal displacement beyond the range. Attached Figure Description

[0026] Figure 1 This is a first-view structural schematic diagram of the cast steel trestle articulated support based on the arc groove-half shaft fit of this utility model.

[0027] Figure 2 This is a second-view structural schematic diagram of the cast steel trestle articulated support based on the arc groove-half shaft fit of this utility model.

[0028] Figure 3 This is a third-view structural diagram of the cast steel trestle articulated support based on the arc groove-half shaft fit of this utility model.

[0029] Figure 4 This is a fourth-view structural diagram of the cast steel trestle articulated support based on the arc groove-half shaft fit of this utility model.

[0030] Figure 5 This is a schematic diagram of the upper support and arc groove structure of this utility model.

[0031] Figure 6 This is a schematic diagram of the upper support and fixed flange structure of this utility model.

[0032] Figure 7 This is a schematic diagram of the upper top plate and upper support structure of this utility model.

[0033] Figure 8 This is a schematic diagram of the lower base plate and lower shaft support structure of this utility model.

[0034] Figure 9 This is a schematic diagram of the side sealing plate and side flange structure of this utility model.

[0035] In the diagram: 1. Upper support; 101. Upper top plate; 102. Upper support; 103. Longitudinal rib; 104. Transverse rib; 105. Fixed sealing plate; 106. Fixed flange; 107. Arc groove; 2. Lower support; 201. Lower bottom plate; 202. Lower shaft support; 203. Groove; 3. Side sealing plate; 301. Reserved hole; 302. Side flange; 4. Bolt; 5. Blind hole; 6. Threaded groove. Detailed Implementation

[0036] This utility model provides, for example Figures 1-9 The cast steel trestle articulated support shown is based on the arc groove-half shaft fit, including an upper support 1 and a lower support 2. The upper support 1 and the lower support 2 are distributed opposite to each other, and both the upper support 1 and the lower support 2 are integral castings.

[0037] The upper support 1 includes an upper top plate 101, on which several threaded grooves 6 are provided. Screws or other structures pass through the threaded grooves 6 to connect with the lower longitudinal beam of the trestle bridge, thereby achieving the connection and fixation between the upper support 1 and the lower longitudinal beam of the trestle bridge. The lower support 2 includes a lower bottom plate 201, on which anchor bolt holes (not shown in the figure) are provided. Screws or other structures pass through the anchor bolt holes, thereby ensuring that the lower bottom plate 201 is accurately installed and fixed in the designed position (such as at the pier or the embedded part of the cap beam).

[0038] The top plate 101 is fixedly connected to an upper support 102 at its bottom. An arc groove 107 is provided at the bottom end of the upper support 102, distributed along the width direction of the top plate 101. A sealing plate 105 is fixedly connected to one end of the arc groove 107. A fixed flange 106 is fixedly connected to the sealing plate 105, and both the bottom edge of the sealing plate 105 and the fixed flange 106 are arc-shaped. The arc of this edge is concentric with the arc groove 107. The fixed flange 106 is distributed along the bottom edge of the sealing plate 105 (see reference). Figure 5 ).

[0039] The bottom plate 201 is fixedly connected to the top of the lower shaft support 202. The upper half of the lower shaft support 202 is semi-circular and matches the shape of the arc groove 107. The lower shaft support 202 can fit against the inner wall of the arc groove 107.

[0040] The intersection of the lower shaft support 202 and the lower base plate 201 is rounded, which effectively avoids stress concentration and enhances the overall structure and mechanical performance.

[0041] A side sealing plate 3 is provided on the side of the lower shaft support 202 facing away from the fixed sealing plate 105. A side flange 302 is fixedly connected to the side sealing plate 3, and the side flange 302 is also arc-shaped and distributed correspondingly to the fixed flange 106.

[0042] Both ends of the lower shaft support 202 are provided with slots 203. One slot 203 is for the fixed flange 106 to be inserted into, and the other slot 203 is for the side flange 302 to be inserted into. The arc length of the slot 203 is greater than the arc length of the fixed flange 106 or the side flange 302, so that the fixed flange 106 or the side flange 302 can slide inside the corresponding slot 203.

[0043] The "convex-concave interlocking" structure of the fixed flange 106, the side flange 302 and the slot 203 forms a longitudinal rigid constraint. The difference between the arc length of the slot 203 and the arc length of the flange (fixed flange 106 and side flange 302) is precisely matched with the rotation angle of the support design, which not only meets the rotation requirements of the trestle due to temperature changes or load, but also completely eliminates longitudinal displacement beyond the range.

[0044] The side sealing plate 3 is installed on the upper support 102 by fastening components. After the upper support 1 and the lower support 2 are connected, the fixed flange 106 is inserted into the groove 203 at one end of the lower shaft support 202, and the side flange 302 is inserted into the groove 203 at the other end of the lower shaft support 202, which can prevent longitudinal displacement between the lower shaft support 202 and the upper support 102. At the same time, the fixed sealing plate 105 and the side sealing plate 3 are respectively distributed on both sides of the lower shaft support 202 to limit lateral displacement between the lower shaft support 202 and the upper support 102.

[0045] Two sets of fastening components are provided, and the two sets of fastening components are symmetrically distributed. The fastening components include a reserved hole 301, a bolt 4, and a blind hole 5. The reserved hole 301 is opened through the side sealing plate 3, and the blind hole 5 is opened on the side wall of the upper support 102. The bolt 4 passes through the reserved hole 301 and mates with the blind hole 5. The inner wall of the blind hole 5 is provided with an internal thread, which mates with the external thread on the outside of the bolt 4. The friction coefficient between the internal thread and the external thread is appropriate, so it will not rotate arbitrarily.

[0046] To prevent bolt 4 from loosening due to vibration, a spring washer can be fitted on bolt 4.

[0047] After the side sealing plate 3 is attached to the side wall of the upper support 102, and the reserved hole 301 and the blind hole 5 are distributed accordingly, the bolt 4 is used to pass through the reserved hole 301 and connect with the blind hole 5 to complete the connection and fixation between the side sealing plate 3 and the upper support 102.

[0048] Both sides of the upper support 102 are fixedly connected with longitudinal ribs 103, which are fixedly connected to the upper top plate 101. The height of the longitudinal ribs 103 gradually decreases away from the upper support 102, that is, the height is the largest near the upper support 102, which ensures the stability of the support and reinforcement of the upper top plate 101 and the upper support 102; at the same time, it can ensure that there is sufficient swing range at both ends of the upper top plate 101; and form a stress transition zone to avoid stress concentration caused by sudden changes in local stiffness.

[0049] A transverse rib 104 is fixedly connected to the longitudinal rib 103. The transverse rib 104 is fixedly connected to the upper top plate 101. Multiple transverse ribs 104 are provided and evenly distributed. The bottom end of the transverse rib 104 is aligned with the lower surface of the corresponding part of the longitudinal rib 103 (see reference). Figure 5 ).

[0050] The longitudinal rib plate 103, the transverse rib plate 104 and the upper top plate 101 together form a stiffening grid to enhance the rigidity of the cantilevered part of the upper support 1.

[0051] The cast steel trestle hinged support utilizes the precise fit between the upper support 102, the arc groove 107, and the lower shaft support 202 to achieve smooth rotation around the shaft while strictly limiting longitudinal and lateral translational displacement, thus ensuring the stability of the structure.

[0052] The unique arc groove 107 with its downward-facing opening design fundamentally avoids the problem of rotation jamming caused by dust accumulation, significantly improving the reliability and durability of long-term use.

[0053] Both the upper support 1 and the lower support 2 are made using an integral casting process. Combined with the rounded corners of key parts of the lower support 2, stress concentration is effectively avoided, and the overall structure and mechanical properties are enhanced.

[0054] In addition, its ingenious structure of a fixed sealing plate 105 on one side and a detachable side sealing plate 3 on the other side makes the installation and assembly process extremely simple and efficient, while also facilitating subsequent maintenance and inspection, thus combining functionality with the convenience of construction and maintenance.

[0055] The on-site installation process for this support is as follows:

[0056] 1. Fix the lower support 2. First, accurately install and fix the lower support 2 in the designed position;

[0057] 2. Hoist the upper support 1 into place. Use a lifting device to lift the upper support 1 so that the arc groove 107 at the bottom of the upper support 102 is aligned and it is placed steadily on the lower shaft support 202 of the lower support 2.

[0058] 3. Lateral sliding and locking: Move the upper support 1 laterally along the axis of the lower shaft support 202 so that the fixed flange 106 fixedly connected on the fixed sealing plate 105 slides into and is completely locked into the corresponding groove 203 at one end of the lower shaft support 202.

[0059] 4. Install the side sealing plate 3, fasten the detachable side sealing plate 3 to the open side of the upper support 102, and ensure that its corresponding fixed flange 106 is aligned and inserted into the corresponding slot 203 at the other end of the lower shaft support 202.

[0060] 5. Tighten the connection: Put the spring washer on the bolt 4, pass it through the reserved hole 301, and screw it into the corresponding blind hole 5. Use a wrench or other tools to tighten it to the specified torque.

[0061] The support is now installed after following the steps above.

[0062] This utility model achieves rotation function through a unique "arc groove (arc groove 107) - half shaft (lower shaft support 202)" cooperation mechanism, restricts lateral displacement through the cooperation of "flange (fixed flange 106, side flange 302) - groove 203" on both sides, and ensures the strength and rigidity of the structure through the design of longitudinal rib plate 103 and transverse rib plate 104.

Claims

1. A cast steel trestle hinge support based on an arc groove-half shaft fit, comprising an upper support (1) and a lower support (2), characterized in that: The upper support (1) and the lower support (2) are distributed relative to each other; The upper support (1) includes an upper top plate (101), and an upper support (102) is fixedly connected to the bottom of the upper top plate (101). An arc groove (107) is provided at the bottom end of the upper support (102), and the arc groove (107) is distributed along the width direction of the upper top plate (101). The lower support (2) includes a lower base plate (201), and a lower shaft support (202) is fixedly connected to the top of the lower base plate (201). The upper half of the lower shaft support (202) is semi-circular and fits against the arc groove (107). One end of the arc groove (107) is fixedly connected to a fixed sealing plate (105), and a fixed flange (106) is fixedly connected to the fixed sealing plate (105). A side sealing plate (3) is provided on the side of the lower shaft support (202) facing away from the fixed sealing plate (105). A side flange (302) is fixedly connected to the side sealing plate (3). Both the fixed flange (106) and the side flange (302) are arc-shaped. Both ends of the lower shaft support (202) are provided with slots (203) for the fixed flange (106) or the side flange (302) to slide. The side sealing plate (3) is mounted on the upper support (102) by a fastening assembly.

2. The cast steel trestle hinge support based on arc groove-half shaft fit according to claim 1, characterized in that: The fastening assembly includes a pre-drilled hole (301), a bolt (4), and a blind hole (5). The pre-drilled hole (301) is opened through the side sealing plate (3), and the blind hole (5) is opened on the side wall of the upper support (102). The bolt (4) passes through the pre-drilled hole (301) and connects with the blind hole (5).

3. The cast steel trestle articulated support based on arc groove-half shaft fit according to claim 1, characterized in that: Both sides of the upper support (102) are fixedly connected with longitudinal ribs (103), which are fixedly connected to the upper top plate (101). The height of the longitudinal ribs (103) gradually decreases in the direction away from the upper support (102).

4. The cast steel trestle hinged support based on arc groove-half shaft fit according to claim 3, characterized in that: A transverse rib (104) is fixedly connected to the longitudinal rib (103), and the transverse rib (104) is fixedly connected to the upper top plate (101). Multiple transverse ribs (104) are provided and are evenly distributed.

5. The cast steel trestle hinged support based on the arcuate slot-axle shaft fitting according to claim 1, characterized in that: The arc length of the slot (203) is greater than the arc length of the fixed flange (106) or the side flange (302).

6. The cast steel trestle articulated support based on arc groove-half shaft fit according to claim 1, characterized in that: The top plate (101) has several threaded grooves (6).

Images