Spherical hinge height adjusting device for swivel bridge

Abstract

A swivel bridge spherical hinge height adjusting device comprises a positioning steel ball, an inner cylinder and an outer cylinder, the inner cylinder is vertically arranged, the lower end of the inner cylinder abuts against the upper side of the positioning steel ball, the outer cylinder is movably connected to the outer side of the inner cylinder in the vertical direction, the axis of the outer cylinder coincides with the central axis of a lower spherical hinge, and the upper end of the outer cylinder is located above the inner cylinder and connected to the lower side of the lower spherical hinge. A positioning assembly used for fixing the outer cylinder is installed on the peripheral face of the inner cylinder, and the upper side of the positioning assembly is connected to the lower end of the outer cylinder. According to the design, the inner cylinder is placed on the positioning steel ball, so that when the inclined position of the lower spherical hinge is adjusted, the whole structure is effectively fixed and supported, and the whole lower spherical hinge revolves around the center of the positioning steel ball, so that the rapid overall leveling of the lower spherical hinge is completed; when the overall height of the lower spherical hinge is adjusted, the outer cylinder can freely stretch out and draw back on the inner cylinder to adjust the height in a self-adaptive mode, after the overall height is adjusted in place, the telescopic length is limited through the positioning assembly to keep the adjusted height, and therefore the space height of the lower spherical hinge can be kept, and the positioning precision is high.

Description

Technical Field

[0001] This utility model relates to the field of bridge rotation construction technology, and in particular to a height adjustment device for the ball joint of a rotating bridge. Background Technology

[0002] The spherical hinge of the swing bridge is composed of two interlocking spherical surfaces. The lower spherical hinge is cast into the lower abutment through a positioning frame, while the upper spherical hinge is cast into the upper abutment and the beam. This allows the upper bridge to be rotated to the design position by means of the spherical hinge support after the upper bridge is cast.

[0003] To ensure smooth rotation during bridge construction, it's crucial to prevent horizontal forces from being generated during the rotation of the spherical hinge. This necessitates adjusting the relative height of the lower spherical hinge and maintaining its verticality during installation. However, existing methods struggle to adjust the overall installation height of the spherical hinge, and significant elevation errors can impact the overall dimensions of the pier formwork or the upper foundation. Current techniques often employ jacks to adjust the lower spherical hinge, then fix it in place. Given the spherical hinge's weight of tens of tons, this requires numerous jacks and manpower for repeated adjustments, resulting in low efficiency and poor elevation positioning accuracy due to the lack of fine-tuning techniques. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings and problems of low adjustment efficiency and low elevation positioning accuracy in the existing technology, and to provide a swivel bridge ball joint height adjustment device with high adjustment efficiency and high positioning accuracy.

[0005] To achieve the above objectives, the technical solution of this utility model is: a swivel bridge ball joint height adjustment device, comprising a positioning steel ball, an inner cylinder, and an outer cylinder. The inner cylinder is arranged vertically and its lower end abuts against the upper side of the positioning steel ball. The outer cylinder is movably connected to the outside of the inner cylinder in a vertical direction. The axis of the outer cylinder coincides with the central axis of the lower ball joint. The upper end of the outer cylinder is located above the inner cylinder and connected to the lower side of the lower ball joint. A positioning component for fixing the outer cylinder is installed on the outer circumferential surface of the inner cylinder, and the upper side of the positioning component is connected to the lower end of the outer cylinder.

[0006] The positioning component includes a nut, the inner cylinder is stepped, the outer circumferential surface of the small diameter end of the inner cylinder is provided with an external thread, the nut is threadedly connected to the external thread, and the upper end face of the nut abuts against the lower end face of the outer cylinder.

[0007] The lower end face of the outer cylinder is coaxially connected to a receiving cylinder, and the lower end face of the receiving cylinder abuts against the upper end face of the nut.

[0008] The outer side of the nut is threaded with multiple screws along the circumferential direction.

[0009] The large-diameter end of the inner cylinder is connected to a support block, and the lower side of the support block matches the shape of the positioning steel ball.

[0010] The arc height of the support block is smaller than the radius of the positioning steel ball.

[0011] The inner cylinder has a plurality of rolling steel balls arranged circumferentially on its outer peripheral surface near the upper end. The rolling steel balls are rotatably connected to the inner cylinder and their outer sides are attached to the inner sidewall of the outer cylinder.

[0012] The upper end face of the inner cylinder has multiple rows of raceways in the vertical direction. The multiple rows of raceways are evenly distributed around the outer circumference of the inner cylinder. Each row of raceways is rotatably connected to multiple rolling steel balls. The multiple rolling steel balls are arranged at intervals in the raceway in the vertical direction. The outer side of the rolling steel balls passes through the raceway and then adheres to the inner side wall of the outer cylinder.

[0013] The raceway has a circular arc cross-section, and the radius of the raceway cross-section matches the radius of the rolling steel ball.

[0014] The chord distance of the raceway is smaller than the radius of the rolling steel ball.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. This utility model discloses a ball joint height adjustment device for a rotating bridge. It utilizes the principle that the ball joint's fixed radius will always rotate around its center during rotation. The rotation radius of the lower ball joint is changed by the extension and retraction between the inner and outer cylinders. The inner cylinder is placed on a positioning steel ball, ensuring effective fixation and support for the entire structure during tilt adjustment. This allows the lower ball joint to revolve around the center of the positioning steel ball, thus achieving the verticality of the outer cylinder and ensuring rapid overall leveling of the lower ball joint. When the overall height of the lower ball joint is adjusted using a jack, the outer cylinder can freely extend and retract on the inner cylinder to adaptively adjust the height. After the overall height is adjusted to the correct position, the extension and retraction length is limited by a positioning component to maintain the adjusted height, thereby maintaining the spatial height of the lower ball joint with high positioning accuracy. Therefore, this utility model offers high adjustment efficiency and positioning accuracy.

[0017] 2. In this utility model, a ball joint height adjustment device for a rotating bridge utilizes internal rolling steel balls to transform sliding friction into rolling friction, reducing resistance. During adjustment, this effectively alleviates uneven stress on the inner and outer cylinder structures, preventing jamming between the inner and outer cylinders. After the overall height is adjusted to the correct position, a rotating nut achieves a limit stop. The threaded design facilitates fine-tuning and ensures high-precision elevation positioning. This avoids the situation in existing devices where, after the lower ball joint height is adjusted to the correct position, the lower ball joint becomes unstable or unevenly supported when the jack is unloaded, leading to resetting or tilting and requiring repeated adjustments. This device ensures smooth adjustment while facilitating later disassembly and reuse, and also improves the reliability and stability of the device. Therefore, this utility model exhibits high reliability and good stability.

[0018] 3. In this utility model's swivel bridge ball joint height adjustment device, by making the arc height of the support block smaller than the radius of the positioning steel ball, the radius of the large-diameter end of the inner cylinder can be significantly reduced to lighten its weight, while simultaneously increasing the movement space of the inner cylinder when rotating around the positioning steel ball. Therefore, this utility model has good stability and high flexibility. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a cross-sectional schematic diagram of the present invention.

[0021] Figure 3 This is a structural schematic diagram of the inner cylinder and positioning component in this utility model.

[0022] Figure 4 This is a schematic diagram of the inner cylinder and positioning steel ball in this utility model.

[0023] Figure 5 This is a schematic diagram of the inner cylinder and rolling steel ball in this utility model.

[0024] In the diagram: 1. Positioning steel ball; 2. Inner cylinder; 21. Raceway; 22. Support block; 3. Outer cylinder; 4. Positioning assembly; 41. Nut; 42. Screw; 5. Receiving cylinder; 6. Rolling steel ball; 7. Lower ball joint. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Example 1:

[0027] See Figure 1 and Figure 2A height adjustment device for a swivel bridge ball joint includes a positioning steel ball 1, an inner cylinder 2, and an outer cylinder 3. The inner cylinder 2 is vertically arranged and its lower end abuts against the upper side of the positioning steel ball 1. The outer cylinder 3 is slidably connected to the outer side of the inner cylinder 2 in a vertical direction. The axis of the outer cylinder 3 coincides with the central axis of the lower ball joint 7. The upper end of the outer cylinder 3 is located above the inner cylinder 2 and connected to the lower side of the lower ball joint 7. A positioning component 4 for fixing the outer cylinder 3 is installed on the outer circumferential surface of the inner cylinder 2. The upper side of the positioning component 4 is connected to the lower end of the outer cylinder 3.

[0028] In this embodiment, the inner cylinder 2 is placed on the positioning steel ball 1 so that the entire structure is effectively fixed and supported when the lower ball hinge 7 is adjusted in tilt position, and the whole structure revolves around the center of the positioning steel ball 1, thereby completing the rapid overall leveling of the lower ball hinge 7. Since the ball hinge height is not in the design position, it will affect the use of the shaping template and the overall shape and size of the upper support platform. Therefore, the lower ball hinge 7 needs to be adjusted to the design elevation. The inner cylinder 2 is directly fitted inside the outer cylinder 3 and slides. When the lower ball hinge needs to be raised or lowered, multiple jacks are extended and retracted at the same time. At this time, the lower ball hinge 7 will be raised or lowered as a whole. When tilt correction is required, only a few jacks need to be raised. After the height adjustment is completed, the outer cylinder 3 is fixed by the positioning component 4, thereby maintaining the spatial height of the lower ball hinge 7.

[0029] Example 2:

[0030] The basic content is the same as in Example 1, except that:

[0031] See Figures 1 to 3 The positioning component 4 includes a nut 41. The inner cylinder 2 is stepped. The outer circumferential surface of the small-diameter end of the inner cylinder 2 is provided with an external thread. The nut 41 is threaded to the external thread. The upper end face of the nut 41 abuts against the lower end face of the outer cylinder 3. The lower end face of the outer cylinder 3 is coaxially connected to a receiving cylinder 5. The lower end face of the receiving cylinder 5 abuts against the upper end face of the nut 41. Multiple screws 42 are threaded along the circumferential direction on the outer side of the nut 41. The large-diameter end of the inner cylinder 2 is connected to a support block 22. The lower side of the support block 22 matches the shape of the positioning steel ball 1. The arc height of the support block 22 is smaller than the radius of the positioning steel ball 1.

[0032] In this embodiment, an external thread is milled on the outer periphery of the bottom of the inner cylinder 2, and a nut 41 is fitted onto the external thread. The top surface of the nut 41 rests on the receiving cylinder 5. A screw rod 42 is inserted into a hole drilled on the outside of the nut 41 to replace the wrench for easy rotation. When the nut 41 at the bottom of the inner cylinder 2 is rotated, the top surface of the large nut 41 rests on the outer cylinder 3. At this time, after connecting the lower ball joint 7 to the positioning frame, the jack can be removed, thus completing the height adjustment of the lower ball joint 7. For the heavier lower ball joint 7, a square hole is opened at the thread after lifting and a square steel is directly inserted to prevent the lower ball joint from falling back, thus avoiding the rotational force generated by the nut 41 under its own weight.

[0033] Example 3:

[0034] The basic content is the same as in Example 1, except that:

[0035] See Figures 3 to 5 The inner cylinder 2 has multiple rolling steel balls 6 arranged circumferentially on its outer peripheral surface near the upper end. The rolling steel balls 6 are rotatably connected to the inner cylinder 2 and their outer sides are attached to the inner sidewall of the outer cylinder 3. The upper end surface of the inner cylinder 2 has multiple rows of raceways 21 arranged vertically. The multiple rows of raceways 21 are evenly distributed circumferentially on the outer peripheral surface of the inner cylinder 2. Each row of raceways 21 is rotatably connected to multiple rolling steel balls 6. The multiple rolling steel balls 6 are arranged vertically at intervals in the raceways 21. The outer sides of the rolling steel balls 6 pass through the raceways 21 and are attached to the inner sidewall of the outer cylinder 3. The cross-section of the raceway 21 is arc-shaped. The radius of the cross-section of the raceway 21 matches the radius of the rolling steel balls 6 to ensure minimum rotational clearance. The chord distance of the raceway 21 is smaller than the radius of the rolling steel balls 6.

[0036] In this embodiment, in order to reduce frictional resistance, a rolling friction is adopted instead of sliding friction. The raceway 21 of the inner cylinder 2 is uniformly drilled into spline-shaped circular holes, so that the rolling steel ball 6 will not fall out when it is placed in the drilled raceway 21.

Claims

1. A swivel bridge ball hinge height adjustment device, characterized by: The application relates to a positioning device, which comprises a positioning steel ball (1), an inner cylinder (2) and an outer cylinder (3), wherein the inner cylinder (2) is vertically arranged and the lower end of the inner cylinder (2) abuts against the upper side of the positioning steel ball (1), the outer cylinder (3) is movably connected to the outer side of the inner cylinder (2) in the vertical direction, the axis of the outer cylinder (3) coincides with the central axis of a lower ball hinge (7), the upper end of the outer cylinder (3) is located above the inner cylinder (2) and is connected to the lower side of the lower ball hinge (7), and the outer peripheral surface of the inner cylinder (2) is provided with a positioning assembly (4) for fixing the outer cylinder (3), and the upper side of the positioning assembly (4) is connected to the lower end of the outer cylinder (3).

2. The swivel bridge ball hinge height adjustment device according to claim 1, wherein: The positioning assembly (4) comprises a nut (41), the inner cylinder (2) is in a stepped shape, the outer peripheral surface of the small-diameter end of the inner cylinder (2) is provided with external threads, the nut (41) is threadedly connected to the external threads, and the upper end surface of the nut (41) abuts against the lower end surface of the outer cylinder (3).

3. A swivel bridge ball hinge height adjustment device according to claim 2, wherein: The lower end surface of the outer cylinder (3) is coaxially connected with a receiving cylinder (5), and the lower end surface of the receiving cylinder (5) abuts against the upper end surface of the nut (41).

4. The swivel bridge ball hinge height adjustment device according to claim 2, wherein: The outer side surface of the nut (41) is circumferentially threadedly connected with a plurality of screw rods (42).

5. The swivel bridge ball hinge height adjustment device according to claim 2, wherein: The large-diameter end of the inner cylinder (2) is connected with a supporting block (22), and the lower side of the supporting block (22) matches the shape of the positioning steel ball (1).

6. A swivel bridge ball hinge height adjustment device according to claim 5, wherein: The circular arc height of the supporting block (22) is smaller than the radius of the positioning steel ball (1).

7. The swivel bridge ball hinge height adjustment device according to claim 1, wherein: The outer peripheral surface of the inner cylinder (2) close to the upper end is circumferentially provided with a plurality of rolling steel balls (6), and the rolling steel balls (6) are rotatably connected to the inner cylinder (2) and are attached to the inner side wall of the outer cylinder (3).

8. A swivel bridge ball hinge height adjustment device according to claim 7, wherein: The upper end surface of the inner cylinder (2) is provided with a plurality of rows of rolling grooves (21) in the vertical direction, the plurality of rows of rolling grooves (21) are uniformly distributed on the outer peripheral surface of the inner cylinder (2) in the circumferential direction, a plurality of rolling steel balls (6) are rotatably connected in each row of rolling grooves (21), a plurality of rolling steel balls (6) are arranged in the rolling grooves (21) in the vertical direction, and the outer sides of the rolling steel balls (6) are attached to the inner side wall of the outer cylinder (3) after passing through the rolling grooves (21).

9. A swivel bridge ball hinge height adjustment device according to claim 8, wherein: The cross section of the rolling groove (21) is in a circular arc shape, and the radius of the cross section of the rolling groove (21) matches the radius of the rolling steel ball (6).

10. The swivel bridge ball hinge height adjustment device of claim 9, wherein: The chord distance of the rolling groove (21) is smaller than the radius of the rolling steel ball (6).

Images