Temporary force unloading and reinforcing device for space truss

Abstract

This invention discloses a temporary stress-relieving and reinforcement device for a space frame. The invention relates to the field of reinforcement technology and includes a lower sphere and an upper sphere. A driving assembly and a support assembly are disposed between the lower and upper spheres. The driving assembly includes a connecting box, a rotating box, a driven gear, a driving gear, a moving frame, and a driving wheel. The driving gear and the driven gear are meshed on their sides, and the side of the rotating box is rotatably connected to the inner wall of the connecting box. This invention, through the bidirectional adjustment function of the driving assembly, can adapt to reinforcement scenarios at different positions and heights of the space frame, solving the problem of traditional fixed reinforcement devices being installed in one location and having poor adaptability. With the help of a first servo motor and the meshing transmission of the driving and driven gears, the support assembly can rotate circumferentially around the support rod, accurately aligning with the direction of concentrated load on the space frame, allowing for switching of reinforcement positions without disassembly and reassembly.

Description

Technical Field

[0001] This invention belongs to the field of reinforcement technology, specifically relating to a temporary stress-relieving reinforcement device for a space frame. Background Technology

[0002] As a key component for ensuring the structural stability of large-span roof buildings, the structural stability of space frames is directly related to personnel safety and operational continuity. With the increase in the number of large-span structures and their service life, the load pressure and structural safety risks faced by space frames during long-term use are becoming increasingly prominent, and the limitations of existing reinforcement technologies further exacerbate this problem.

[0003] Traditional reinforcement devices are mostly rigid structures with preset dimensions, which can only be adapted to space frames with specific heights and spans. If there are differences in the height or span of the space frame, reinforcement devices of different specifications need to be customized. Therefore, we propose a temporary stress relief reinforcement device for space frames. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides a temporary stress relief and reinforcement device for a space frame, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A temporary stress-relieving and reinforcement device for a space frame, specifically:

[0007] It includes a lower sphere and an upper sphere, and a driving component and a supporting component are disposed between the lower sphere and the upper sphere;

[0008] The drive assembly includes a connecting box, a rotating box, a driven gear, a driving gear, a moving frame, and a drive wheel. The driving gear is meshed with the side of the driven gear, the side of the rotating box is rotatably connected to the inner wall of the connecting box, and the side of the drive wheel is rotatably connected to the inner wall of the moving frame.

[0009] The support assembly includes a stress relief rod, an electric pull rod, a support frame, a contact ring, and a connecting block. The telescopic end of the electric pull rod is connected to the side of the connecting block. One end of the stress relief rod is rotatably connected to the side of the connecting block, and the other end of the stress relief rod is rotatably connected to the side of the support frame. The side of the contact ring is rotatably connected to the inner wall of the support frame.

[0010] Furthermore, a first servo motor is connected to the upper end face of the connecting box, and the output end of the first servo motor passes through the inner wall of the connecting box and is connected to the center of the drive gear.

[0011] Furthermore, a second servo motor is connected to the side of the mobile frame, and the output end of the second servo motor passes through the inner wall of the mobile frame and is connected to the center of the drive wheel.

[0012] Furthermore, an electric telescopic rod is connected to the inner wall of the connecting box, and the telescopic end of the electric telescopic rod is connected to the side of the movable frame.

[0013] Furthermore, the inner wall of the driven gear is connected to the side of the rotating box, and the driving gear is rotatably connected to the inner wall of the connecting box.

[0014] Furthermore, a support rod is connected between the upper sphere and the lower sphere, and the side of the drive wheel is in rolling connection with the side of the support rod.

[0015] Furthermore, one end of the electric pull rod is connected to the side of the connecting box.

[0016] Furthermore, the side of the contact ring abuts against the side of the lower sphere.

[0017] Furthermore, the side of the drive gear is rotatably connected to the inner wall of the connecting box.

[0018] The beneficial effects of this invention are:

[0019] 1) This invention, through the bidirectional adjustment function of the drive component, can adapt to reinforcement scenarios of different positions and heights of the space frame, solving the problem of poor adaptability of traditional fixed reinforcement devices that require one-site installation. With the help of the meshing transmission of the first servo motor, the active gear and the driven gear, the support component can rotate around the support rod, which can accurately align with the direction of concentrated load on the space frame (such as the edge of the space frame, the local deformation area). The reinforcement position can be switched without disassembly and reassembly. The electric telescopic rod pushes the moving frame and the second servo motor drives the drive wheel to roll, which can drive the entire drive component and support component to move up and down along the support rod, adapting to the force requirements of space frames of different heights and avoiding the problem that the reinforcement device cannot be used due to the difference in the height of the space frame.

[0020] 2) This invention transfers the load of the space frame from a single point on the support rod through the contact ring, expanding it to a multi-point force transmission of the support rod and support assembly. This significantly reduces the stress intensity at a single point. The rotational connection between the stress relief rod and the connecting block and support frame, combined with the spherical contact between the contact ring and the lower sphere (the contact ring can rotate adaptively), ensures that the support assembly and the foundation structure (lower sphere) are in close contact, avoiding stress relief failure due to contact gaps, and preventing local stress concentration from damaging the space frame or the device itself. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the support rod in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the unloading rod in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the connecting box in an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the rotating box in an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the mobile frame in an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the drive wheel in an embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the contact ring in an embodiment of the present invention.

[0029] In the diagram: 1. Lower sphere; 2. Upper sphere; 3. Support rod; 4. Drive assembly; 41. Connecting box; 42. Rotating box; 43. First servo motor; 44. Driven gear; 45. Drive gear; 46. Moving frame; 47. Drive wheel; 48. Electric telescopic rod; 49. Second servo motor; 5. Support assembly; 51. Unloading rod; 52. Electric pull rod; 53. Support frame; 54. Contact ring; 55. Connecting block. Detailed Implementation

[0030] The present invention will now be described in detail with reference to specific embodiments.

[0031] Please see the appendix Figure 1 - Appendix Figure 8 The present invention provides a temporary stress relief and reinforcement device for a space frame, comprising a lower sphere 1 and an upper sphere 2, wherein a driving component 4 and a supporting component 5 are disposed between the lower sphere 1 and the upper sphere 2;

[0032] In embodiment 1, the drive assembly 4 includes a connecting box 41, a rotating box 42, a driven gear 44, a driving gear 45, a moving frame 46, and a drive wheel 47. The driving gear 45 is meshed with the side of the driven gear 44. The side of the rotating box 42 is rotatably connected to the inner wall of the connecting box 41. The side of the drive wheel 47 is rotatably connected to the inner wall of the moving frame 46. A first servo motor 43 is connected to the upper end face of the connecting box 41. The output end of the first servo motor 43 passes through the inner wall of the connecting box 41 and is connected to the center of the driving gear 45. A second servo motor is connected to the side of the moving frame 46. The output end of the second servo motor 49 passes through the inner wall of the moving frame 46 and is connected to the center of the drive wheel 47. The inner wall of the connecting box 41 is connected to an electric telescopic rod 48. The telescopic end of the electric telescopic rod 48 is connected to the side of the moving frame 46. The inner wall of the driven gear 44 is connected to the side of the rotating box 42. The driving gear 45 is rotatably connected to the inner wall of the connecting box 41. The upper ball 2 and the lower ball 1 are connected together by a support rod 3. The side of the drive wheel 47 is rolledly connected to the side of the support rod 3. The side of the driving gear 45 is rotatably connected to the inner wall of the connecting box 41.

[0033] Specifically, the drive wheel 47 is made of polyurethane-coated material with a surface hardness of Shore A 85-90 and a wheel diameter to support rod 3 diameter ratio of 3:1. The polyurethane material can increase the coefficient of friction with the support rod 3 (static friction coefficient ≥0.6), preventing the drive wheel 47 from slipping and reducing wear on the surface of the support rod 3. The 3:1 wheel diameter ratio can reduce the speed requirement of the second servo motor 49, keeping the axial movement speed controlled at 5-10mm / s, achieving smooth height adjustment and preventing the connecting box 41 from shaking due to excessive movement.

[0034] In practice, the circumferential angle needs to be adjusted first, followed by the axial height. If the height is adjusted first, the support component 5 may interfere with the grid structure due to the circumferential position deviation. During circumferential adjustment, the speed of the first servo motor 43 will automatically adapt to the rotation angle. When the rotation angle is <90°, the speed is 100-200 r / min (rapid positioning). When the rotation angle is close to the target angle (difference <5°), the speed drops to 50-100 r / min (precise fine adjustment) to avoid angle overshoot due to inertia.

[0035] In embodiment 2, the support assembly 5 includes a stress relief rod 51, an electric pull rod 52, a support frame 53, a contact ring 54, and a connecting block 55. The telescopic end of the electric pull rod 52 is connected to the side of the connecting block 55. One end of the stress relief rod 51 is rotatably connected to the side of the connecting block 55, and the other end of the stress relief rod 51 is rotatably connected to the side of the support frame 53. The side of the contact ring 54 is rotatably connected to the inner wall of the support frame 53. One end of the electric pull rod 52 is connected to the side of the connecting box 41, and the side of the contact ring 54 abuts against the side of the lower ball 1.

[0036] Specifically, the contact ring 54 is made of wear-resistant cast iron, and the ratio of the inner ring diameter to the lower ball 1 diameter is 1.05:1. The inner ring surface is provided with an arc-shaped groove. The 1.05:1 diameter ratio ensures that the contact ring 54 can adapt to the spherical curvature of the lower ball 1 and avoid local point contact. The arc-shaped groove can store a small amount of grease (such as lithium-based grease) to reduce the rotational friction between the contact ring 54 and the lower ball 1, while preventing dust from entering and affecting the bonding effect.

[0037] The telescopic end of the electric pull rod 52 integrates a displacement sensor. When the contact ring 54 is in contact with the lower ball 1, the displacement sensor will monitor the extension of the electric pull rod 52 in real time. When the extension reaches the set value (corresponding to a contact pressure of 1000-1500N, calculated according to the load of the space frame), the electric pull rod 52 will automatically stop extending to avoid the surface of the lower ball 1 being dented or the unloading rod 51 being overloaded and damaged due to excessive contact pressure. If the load of the space frame increases and the contact pressure decreases, the displacement sensor will trigger the electric pull rod 52 to extend again to replenish the contact pressure and maintain the unloading effect.

[0038] Working principle:

[0039] First, fix the lower ball 1 to the ground (or the fixed base under the grid), connect the upper ball 2 to the load-bearing structure of the grid, and connect the lower ball 1 and the upper ball 2 with the support rod 3 to form the basic force transmission path of the device. At this time, the drive component 4 and the support component 5 are in a retracted and adjustable state, the contact ring 54 is not in close contact with the lower ball 1, and the unloading rod 51 is in a folded state.

[0040] In this stage, the support component 5 is moved to the corresponding position where the grid needs to be unloaded and reinforced by adjusting the two dimensions of the drive component 4. The first servo motor 43 is started, and its output end drives the drive gear 45 to rotate on the inner wall of the connecting box 41. Since the drive gear 45 meshes with the driven gear 44, the driven gear 44 will synchronously drive the rotating box 42 to rotate along the inner wall of the connecting box 41. The rotation of the rotating box 42 will cause the support component 5 (connected to the side of the connecting box 41) to rotate around the support rod 3 until the support component 5 is aligned with the direction of concentrated load of the grid (such as the edge of the grid, the stress deformation point). The electric telescopic rod 48 is started, and its telescopic end pushes the moving frame 46 to move laterally along the inner wall of the connecting box 41, so that the drive wheel 47 is close to the side of the support rod 3. Then the second servo motor 49 is started, and its output end drives the drive wheel 47 to rotate. The rolling friction between the drive wheel 47 and the support rod 3 will drive the entire connecting box 41 (and the support component 5) to move up and down along the axis of the support rod 3 until the support component 5 reaches the height position where the grid needs to be unloaded.

[0041] After the drive assembly 4 completes the position adjustment, the support assembly 5 starts and realizes the unloading-reinforcement function, and starts the electric pull rod 52. Its telescopic end pushes the connecting block 55 to move away from the connecting box 41. Since one end of the unloading rod 51 is rotatably connected to the connecting block 55 and the other end is rotatably connected to the support frame 53, the movement of the connecting block 55 will drive the unloading rod 51 to unfold around the two rotating shafts, so that the support frame 53 moves closer to the lower ball 1. As the unloading rod 51 continues to unfold, the contact ring 54 on the inner wall of the support frame 53 will gradually come into close contact with the side of the lower ball 1. The contact ring 54 can rotate along the inner wall of the support frame 53, which can adapt to the spherical curvature of the lower ball 1, ensuring close contact and no local stress concentration.

[0042] At this point, the load on the space frame (such as its own weight and wind and rain load) will be transferred to the support rod 3 through the upper sphere 2. At the same time, the support component 5 assists in the unloading path, dispersing the single-point load on the support rod 3, and preventing the space frame from deforming or being damaged due to excessive local stress. During the continuous operation of the device, if the load on the space frame changes slightly (such as wind fluctuations), the support component 5 can dynamically adapt through its structural characteristics. The rotating connection between the contact ring 54 and the lower sphere 1 can adjust the contact angle when the load direction changes slightly, ensuring the stability of the support. The rotating connection between the unloading rod 51 and the connecting block 55 and the support frame 53 can buffer the stress through slight rotation when the load changes slightly, avoiding component damage caused by rigid support, and continuously maintaining the unloading and reinforcement effect. At this point, the entire workflow is completed.

[0043] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on.

[0044] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0045] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments.

[0046] For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A temporary stress-relieving and reinforcement device for a space frame, characterized in that: It includes a lower sphere (1) and an upper sphere (2), and a driving component (4) and a supporting component (5) are provided between the lower sphere (1) and the upper sphere (2). The drive assembly (4) includes a connecting box (41), a rotating box (42), a moving frame (46), and a drive wheel (47). The side of the rotating box (42) is rotatably connected to the inner wall of the connecting box (41). An electric telescopic rod (48) is connected to the inner wall of the connecting box (41), and the telescopic end of the electric telescopic rod (48) is connected to the side of the moving frame (46). The side of the drive wheel (47) is rotatably connected to the inner wall of the moving frame (46). The support assembly (5) includes a stress relief rod (51), an electric pull rod (52), a support frame (53), a contact ring (54), and a connecting block (55). The telescopic end of the electric pull rod (52) is connected to the side of the connecting block (55). One end of the stress relief rod (51) is rotatably connected to the side of the connecting block (55), and the other end of the stress relief rod (51) is rotatably connected to the side of the support frame (53). The side of the contact ring (54) is rotatably connected to the inner wall of the support frame (53). One end of the electric pull rod (52) is connected to the side of the connecting box (41).

2. The temporary stress-relieving and reinforcement device for a space frame according to claim 1, characterized in that: The drive assembly (4) further includes a driven gear (44) and a driving gear (45); the driving gear (45) is engaged with the driven gear (44) on the side. The inner wall of the driven gear (44) is connected to the side of the rotating box (42), and the driving gear (45) is rotatably connected to the inner wall of the connecting box (41).

3. The temporary stress-relieving and reinforcement device for a space frame according to claim 2, characterized in that: The upper end of the connecting box (41) is connected to a first servo motor (43), and the output end of the first servo motor (43) passes through the inner wall of the connecting box (41) and is connected to the center of the drive gear (45).

4. The temporary stress-relieving and reinforcement device for a space frame according to claim 3, characterized in that: The side of the mobile frame (46) is connected to a second servo motor (49), and the output end of the second servo motor (49) passes through the inner wall of the mobile frame (46) and is connected to the center of the drive wheel (47).

5. The temporary stress-relieving and reinforcement device for a space frame according to claim 4, characterized in that: The upper sphere (2) and the lower sphere (1) are connected by a support rod (3), and the side of the drive wheel (47) is in rolling connection with the side of the support rod (3).

6. The temporary stress-relieving and reinforcement device for a space frame according to claim 5, characterized in that: The side of the contact ring (54) abuts against the side of the lower sphere (1).

7. The temporary stress-relieving and reinforcement device for a space frame according to claim 6, characterized in that: The side of the drive gear (45) is rotatably connected to the inner wall of the connecting box (41).

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