Adjustable prestressed cable device

Abstract

The utility model relates to stress cable technology field, concretely is a kind of adjustable prestressed cable device, including mounting bracket, connecting frame, adjusting screw rod and anti-loosening mechanism;One end of mounting bracket is connected with connecting lug;Connecting frame is set in the end of mounting bracket and is used to fix the end of cable, and connecting frame penetrates mounting bracket and is slidably connected with mounting bracket;Adjusting screw rod is set in mounting bracket, and one end of adjusting screw rod is rotatably connected with mounting bracket, and the other end of adjusting screw rod is threadedly connected with threaded sleeve, and the end, away from adjusting screw rod, of threaded sleeve is fixedly connected with connecting frame;Anti-loosening mechanism is set on mounting bracket, and one end of anti-loosening mechanism is connected with mounting bracket.The utility model is provided with anti-loosening mechanism, check pawl is attached to spring elastic force under the action of check ratchet wheel and attaches to the check tooth of check ratchet wheel, and adjusting screw rod is positioned, to prevent loosening between adjusting screw rod and threaded sleeve, and then avoid the prestress of cable to be small.

Description

Technical Field

[0001] This utility model relates to the field of stress cable technology, specifically to an adjustable prestressed cable device. Background Technology

[0002] Prestressed cables are increasingly used in large-scale spatial structures. Applying prestressing technology to structures not only increases structural stiffness, reduces weight, and decreases steel consumption, but also creates various new structural systems, with particularly significant effects in long-span steel structures. To establish prestress in the cables, tensioning is inevitably required.

[0003] Chinese Patent CN201635015U discloses an adjustable wind-resistant cable for large structural buildings. This cable includes at least a prestressed cable and a cable fixing device. The prestressed cable has an upper anchor head and a lower anchor head at both ends, and a cable fixing device at each end. The cable fixing device is a pin-type anchoring device. The cable includes a preload adjusting sleeve and a connector, and a reaction tensioning device at the bottom. This cable can be installed by fixing both ends and tensioning the middle, eliminating the need for large anchor bodies on the building structure and reserving space for tensioning and anchoring operations. Furthermore, this cable has the advantages of high force, high strength, and low elasticity, enabling it to meet the wind resistance requirements of large tonnage structures with low deformation.

[0004] However, the above technical solution has the following shortcomings: the performance of the cable under wind load is mainly reflected in the tensile stress caused by the wind and the resulting vibration. The vibration of the cable can easily cause relative rotation between the adjusting sleeve and the connecting rod. The rotation of the adjusting sleeve leads to a decrease in the prestress of the cable. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing an adjustable prestressed cable device.

[0006] The technical solution of this utility model: an adjustable prestressed cable device, comprising:

[0007] The mounting bracket has a connecting lug at one end;

[0008] A connecting frame, which is set at one end of the mounting frame to fix the end of the cable, passes through the mounting frame and is slidably connected to the mounting frame;

[0009] An adjusting screw is installed inside the mounting bracket. One end of the adjusting screw is rotatably connected to the mounting bracket, and the other end of the adjusting screw is threadedly connected to a threaded sleeve. The end of the threaded sleeve away from the adjusting screw is fixedly connected to the connecting bracket.

[0010] An anti-loosening mechanism is installed on the mounting frame. One end of the anti-loosening mechanism is connected to the mounting frame, and the other end of the anti-loosening mechanism is connected to the adjusting screw.

[0011] The anti-loosening mechanism includes a check ratchet, a check assembly, and an adjustment assembly. The check ratchet is fixedly connected to the adjustment screw. The check assembly is mounted on the mounting bracket, with one end of the check assembly contacting the ratchet teeth of the check ratchet. The adjustment assembly is mounted on the adjustment screw for adjusting the adjustment screw.

[0012] Preferably, the mounting bracket includes a connecting beam, connecting rods, and a connecting frame; the connecting beam is fixedly connected to the connecting lugs, the adjusting screw is rotatably connected to the connecting beam, two connecting rods are provided, one end of the two connecting rods is fixedly connected to the connecting beam, the other end of the two connecting rods is fixedly connected to the connecting frame, and the connecting bracket passes through the connecting frame and is slidably connected to the connecting frame.

[0013] Preferably, the check valve assembly includes a check valve pawl, a limiting plate, and a contact spring; one end of the check valve pawl is rotatably connected to the connecting beam, one end of the limiting plate is fixedly connected to the connecting beam, one end of the contact spring is fixedly connected to the limiting plate, and the other end of the contact spring is fixedly connected to the check valve pawl; the check valve pawl is in contact with the check valve ratchet under the action of the contact spring.

[0014] Preferably, the adjusting assembly includes a fixed ring, an adjusting cylinder, and a return spring; the fixed ring is fixedly connected to the adjusting screw, the adjusting cylinder is sleeved on the fixed ring and slidably connected to the fixed ring, the adjusting cylinder is slidably connected to the adjusting screw, and the return spring is disposed inside the adjusting cylinder, one end of the return spring is fixedly connected to the fixed ring, and the other end of the return spring is fixedly connected to the inner wall of the adjusting cylinder.

[0015] Preferably, the inner wall of the adjusting cylinder is provided with a guide groove, and a guide strip is fixedly connected to the circumference of the fixing ring, with the guide strip slidably connected to the guide groove.

[0016] Preferably, there are two connecting ears, and a connecting shaft rotatably connects the two connecting ears.

[0017] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0018] This invention utilizes an anti-loosening mechanism. Under the action of the spring force, the anti-return pawl engages with the ratchet teeth of the anti-return ratchet wheel, limiting the adjustment screw and preventing loosening between the adjustment screw and the threaded sleeve. This avoids a decrease in the prestress of the cable. By pushing the adjustment cylinder towards the connecting beam, the anti-return pawl disengages from the ratchet teeth of the anti-return ratchet wheel, allowing the adjustment screw to be rotated in the opposite direction to reduce the preload of the cable, thus facilitating the adjustment of the cable preload. Attached Figure Description

[0019] Figure 1This is a perspective view of one embodiment of the present invention;

[0020] Figure 2 This is a perspective view of one embodiment of the present invention;

[0021] Figure 3 This utility model Figure 2 A magnified view of a section at point A in the middle;

[0022] Figure 4 This is a perspective view of the anti-return pawl in one embodiment of the present invention.

[0023] Figure 5 This is a perspective view of the adjusting cylinder in one embodiment of the present invention.

[0024] Reference numerals: 11. Connecting beam; 12. Connecting rod; 13. Connecting frame; 2. Connecting lug; 31. Check ratchet; 321. Check pawl; 322. Limiting plate; 323. Fitting spring; 331. Fixing ring; 332. Adjusting cylinder; 333. Return spring; 334. Guide groove; 335. Guide strip; 4. Connecting frame; 5. Adjusting screw; 6. Threaded sleeve; 7. Connecting shaft. Detailed Implementation

[0025] Example 1

[0026] like Figure 1-5 As shown, the present invention proposes an adjustable prestressed cable device, which includes a mounting frame, a connecting frame 4, an adjusting screw 5, and an anti-loosening mechanism;

[0027] One end of the mounting bracket is connected to a connecting ear 2. There are two connecting ears 2, and a connecting shaft 7 is rotatably connected between the two connecting ears 2.

[0028] The connecting frame 4 is set at one end of the mounting frame to fix the end of the cable. The connecting frame 4 passes through the mounting frame and is slidably connected to the mounting frame.

[0029] The adjusting screw 5 is installed in the mounting frame. One end of the adjusting screw 5 is rotatably connected to the mounting frame, and the other end of the adjusting screw 5 is threadedly connected to a threaded sleeve 6. The end of the threaded sleeve 6 away from the adjusting screw 5 is fixedly connected to the connecting frame 4.

[0030] The anti-loosening mechanism is installed on the mounting frame. One end of the anti-loosening mechanism is connected to the mounting frame, and the other end of the anti-loosening mechanism is connected to the adjusting screw 5.

[0031] The anti-loosening mechanism includes a check ratchet 31, a check assembly, and an adjustment assembly. The check ratchet 31 is fixedly connected to the adjustment screw 5. The check assembly is mounted on the mounting bracket, with one end of the check assembly contacting the ratchet teeth of the check ratchet 31. The adjustment assembly is mounted on the adjustment screw 5 for adjusting the adjustment screw 5.

[0032] Example 2

[0033] like Figure 1-2 As shown, the present invention proposes an adjustable prestressed cable device. Compared with Embodiment 1, this embodiment also specifically discloses the structure of the mounting frame. The mounting frame includes a connecting beam 11, a connecting rod 12, and a connecting frame 13. The connecting beam 11 is fixedly connected to the connecting lug 2, the adjusting screw 5 is rotatably connected to the connecting beam 11, and two connecting rods 12 are provided. One end of the two connecting rods 12 is fixedly connected to the connecting beam 11, and the other end of the two connecting rods 12 is fixedly connected to the connecting frame 13. The connecting frame 4 passes through the connecting frame 13 and is slidably connected to the connecting frame 13.

[0034] Example 3

[0035] like Figure 2-3 As shown, the present invention proposes an adjustable prestressed cable device. Compared with Embodiment 2, this embodiment also specifically discloses the structure of the check valve assembly. The check valve assembly includes a check pawl 321, a limiting plate 322, and a contact spring 323. One end of the check pawl 321 is rotatably connected to the connecting beam 11, one end of the limiting plate 322 is fixedly connected to the connecting beam 11, one end of the contact spring 323 is fixedly connected to the limiting plate 322, and the other end of the contact spring 323 is fixedly connected to the check pawl 321. The check pawl 321 is in contact with the check ratchet 31 under the action of the contact spring 323.

[0036] Example 4

[0037] like Figure 3 As shown, the present invention discloses an adjustable prestressed cable device. Compared with Embodiment 3, this embodiment further discloses the structure of the adjustment component. The adjustment component includes a fixed ring 331, an adjustment cylinder 332, and a return spring 333. The fixed ring 331 is fixedly connected to the adjustment screw 5. The adjustment cylinder 332 is sleeved on the fixed ring 331 and slidably connected to the fixed ring 331. The adjustment cylinder 332 is slidably connected to the adjustment screw 5. The return spring is disposed inside the adjustment cylinder 332. One end of the return spring 333 is fixedly connected to the fixed ring 331, and the other end of the return spring 333 is fixedly connected to the inner wall of the adjustment cylinder 332. The inner wall of the adjustment cylinder 332 is provided with a guide groove 334. A guide strip 335 is fixedly connected to the circumferential surface of the fixed ring 331, and the guide strip 335 is slidably connected to the guide groove 334.

[0038] The device is connected to the foundation via connecting ear 2 and to the cable via connecting frame 4. When the prestress of the cable needs to be increased, rotating the adjusting cylinder 332 drives the adjusting screw 5 to rotate via the fixing ring 331. The rotation of the adjusting screw 5 drives the connecting frame 4 to move closer to the connecting beam 11 via the threaded sleeve 6, thereby increasing the prestress of the cable. After adjustment, the check pawl 321 engages with the ratchet teeth of the check ratchet wheel 31 under the action of the spring force of the contact spring 323, preventing the adjusting screw 5 from rotating. When the prestress of the cable needs to be decreased, first push the adjusting cylinder 332 closer to the connecting beam 11. The adjustment cylinder 332 moving closer to the connecting beam 11 causes the check pawl 321 to disengage from the ratchet teeth of the check ratchet wheel 31. Rotating the adjusting cylinder 332 in the opposite direction drives the adjusting screw 5 to rotate via the fixing ring 331. The rotation of the adjusting screw 5 drives the connecting frame 4 to move away from the connecting beam 11 via the threaded sleeve 6, thereby decreasing the prestress of the cable.

[0039] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. An adjustable prestressed cable device, characterized in that, include: The mounting bracket has a connecting lug (2) at one end; A connecting frame (4) is provided at one end of the mounting frame to fix the end of the cable. The connecting frame (4) passes through the mounting frame and is slidably connected to the mounting frame. Adjusting screw (5) is installed in the mounting frame. One end of the adjusting screw (5) is rotatably connected to the mounting frame, and the other end of the adjusting screw (5) is threadedly connected to a threaded sleeve (6). The end of the threaded sleeve (6) away from the adjusting screw (5) is fixedly connected to the connecting frame (4). The anti-loosening mechanism is set on the mounting frame. One end of the anti-loosening mechanism is connected to the mounting frame, and the other end of the anti-loosening mechanism is connected to the adjusting screw (5). The anti-loosening mechanism includes a check ratchet (31), a check assembly, and an adjustment assembly; the check ratchet (31) is fixedly connected to the adjustment screw (5), the check assembly is mounted on the mounting bracket, one end of the check assembly contacts the ratchet teeth of the check ratchet (31), and the adjustment assembly is mounted on the adjustment screw (5) for adjusting the adjustment screw (5).

2. The adjustable prestressed cable device according to claim 1, characterized in that, The mounting bracket includes a connecting beam (11), a connecting rod (12), and a connecting frame (13); the connecting beam (11) is fixedly connected to the connecting ear (2), the adjusting screw (5) is rotatably connected to the connecting beam (11), there are two connecting rods (12), one end of the two connecting rods (12) is fixedly connected to the connecting beam (11), and the other end of the two connecting rods (12) is fixedly connected to the connecting frame (13), and the connecting bracket (4) passes through the connecting frame (13) and is slidably connected to the connecting frame (13).

3. The adjustable prestressed cable device according to claim 2, characterized in that, The check valve assembly includes a check pawl (321), a limiting plate (322), and a contact spring (323). One end of the check pawl (321) is rotatably connected to the connecting beam (11), one end of the limiting plate (322) is fixedly connected to the connecting beam (11), one end of the contact spring (323) is fixedly connected to the limiting plate (322), and the other end of the contact spring (323) is fixedly connected to the check pawl (321). The check pawl (321) is in contact with the check ratchet (31) under the action of the contact spring (323).

4. An adjustable prestressed cable device according to claim 1, characterized in that, The adjustment assembly includes a fixed ring (331), an adjustment cylinder (332), and a return spring (333). The fixed ring (331) is fixedly connected to the adjustment screw (5), the adjustment cylinder (332) is sleeved on the fixed ring (331) and slidably connected to the fixed ring (331), the adjustment cylinder (332) is slidably connected to the adjustment screw (5), the return spring is set inside the adjustment cylinder (332), one end of the return spring (333) is fixedly connected to the fixed ring (331), and the other end of the return spring (333) is fixedly connected to the inner wall of the adjustment cylinder (332).

5. An adjustable prestressed cable device according to claim 4, characterized in that, The inner wall of the regulating cylinder (332) is provided with a guide groove (334), and a guide strip (335) is fixedly connected to the circumference of the fixing ring (331). The guide strip (335) is slidably connected to the guide groove (334).

6. An adjustable prestressed cable device according to claim 1, characterized in that, There are two connecting ears (2), and a connecting shaft (7) is rotatably connected between the two connecting ears (2).

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