Stay cable length adjusting device

Abstract

The invention relates to the technical field of bridge inhaul cables, in particular to a stay cable length adjusting device which comprises an adjusting component, a fixing component, a first guide component, a second guide component, two sets of stay cables, a lock catch component, a supporting column, a main beam, a pull ring, two sets of supporting inhaul cables, a bridge frame and a balancing weight. The supporting columns and the main beam are connected through the two sets of supporting inhaul cables to support the bridge frame, the positions of the stay cables are fixed through the fixing component, the bearing capacity borne by the adjusting component can be reduced, and therefore mechanical abrasion is reduced, the stay cables are guided through the first guiding component and the second guiding component, and the service life of the bridge frame is prolonged. The bridge frame is prevented from deviating in the construction process, the moving distance of the stay cable can be read through the fixing component, and therefore the stay cable can be more accurately maintained, operation is easy, the construction efficiency can be improved, the maintenance cost can be reduced, and potential safety hazards caused by looseness of the stay cable are avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge cable technology, in particular to a stay cable length adjusting device. BACKGROUND

[0002] The stay cable is also called cable, which is the main load-bearing component that directly transmits the weight of the main beam and the bridge deck of the cable-stayed bridge to the tower. The cable of the cable-stayed bridge is usually made of steel cable, which can be composed of parallel steel wires, parallel steel cables, single steel cable, steel wire rope, closed steel cable or solid steel bar. Since the cable is placed obliquely, it is called stay cable. The cable-stayed bridge is composed of a tower, a main beam and stay cables. The two ends of the stay cable are arranged on the tower and the main beam respectively. At the initial stage of construction and installation, the stay cable is adjusted in tension by equipment to make the tension reach the set value. After a long period of use, the tension of the stay cable will be lost to a certain extent. However, the existing installation method of the stay cable is relatively fixed, which makes it difficult to adjust the tension.

[0003] At present, the Chinese invention with application number 202310614810.5 discloses a bridge cable stress adjusting device. Although the hierarchical gasket is horizontally slidably arranged in the slot, the adjusting mechanism includes a guide cylinder and a connector, the upper end of the stay cable is fixedly connected with the connector, and the connector is vertically slidably arranged in the guide cylinder, which solves the technical problem of how to adjust the stress of the stay cable. However, after the adjustment is completed, it is troublesome to fix it, when the connection between the steel cables is loose, real-time detection of changes is not possible, and the tension adjustment is difficult. SUMMARY

[0004] The technical problem to be solved by the present application is that it is difficult to fix the stay cable after the length adjustment is completed, the connection between the steel cables is loose, real-time detection of changes is not possible, and the tension adjustment is difficult.

[0005] To solve the above technical problems, the present application provides the following technical scheme: a stay cable length adjusting device, which comprises an adjusting member, a fixing member, a first guide member, a second guide member, two groups of stay cables, a lock member, a support column, a main beam, a pull ring, two groups of support cables, a bridge and a counterweight. One end of one group of stay cables is fixedly connected with the adjusting member, one group of stay cables is hingedly connected with the fixing member, the other end of one group of stay cables is fixedly connected with the first guide member through the lock member, one end of the other group of stay cables is fixedly connected with the counterweight, the other end of the other group of stay cables is fixedly connected with the second guide member through the lock member, the first guide member and the second guide member are respectively fixedly connected with the bridge, and the two ends of the support cable are respectively fixedly connected with the support column and the main beam through the pull ring. The adjusting member is used for adjusting the length of the stay cable. The fixing member is used for locking the cable-stayed cable and monitoring the tension of the cable-stayed cable in real time, so as to avoid the safety hazard caused by excessive deformation of the cable-stayed cable. The first guide member is used for guiding the rope.

[0006] As a preferred scheme of the cable-stayed cable length adjusting device, the adjusting member comprises a base, a motor and a winch, the motor is fixedly connected with the base, an output shaft of the motor is fixedly connected with the winch, and the winch is fixedly connected with the cable-stayed cable.

[0007] As a preferred scheme of the cable-stayed cable length adjusting device, the fixing member comprises a fixed frame, a fixed rod, an elastic reset member, two sets of clamping assemblies and a sliding groove, the fixed rod is fixedly connected with the cable-stayed cable, the fixed rod is fixedly connected with the fixed frame, the fixed rod extends out of the fixed frame and the elastic reset member in sequence, the elastic reset member is fixedly connected with the fixed frame, the clamping assembly is rotationally connected with the fixed rod, and the clamping assembly is clampedly connected with the sliding groove.

[0008] As a preferred scheme of the cable-stayed cable length adjusting device, the first guide member comprises a first fixed pulley, a second fixed pulley and a third fixed pulley, one set of the cable-stayed cables sequentially passes through the first fixed pulley, the second fixed pulley and the third fixed pulley, the second guide member comprises a fourth fixed pulley and a fifth fixed pulley, and the other set of the cable-stayed cables sequentially passes through the fourth fixed pulley and the fifth fixed pulley.

[0009] As a preferred scheme of the cable-stayed cable length adjusting device, the clamping assembly comprises a rotating rod, a clamping rod, a wedge-shaped clamping block and a rotating key, one end of the rotating rod is rotationally connected with the fixed rod, the rotating rod is rotationally connected with the rotating key, the rotating key is fixedly connected with the fixed frame, the other end of the rotating rod is rotationally connected with the clamping rod, the wedge-shaped clamping block is fixedly connected with the rotating rod, the clamping rod is slidingly connected with the fixed frame, and the wedge-shaped clamping block is meshingly connected with the sliding groove.

[0010] As a preferred scheme of the cable-stayed cable length adjusting device, two sets of ratchet bars are symmetrically arranged on the inner side of the sliding groove, and the wedge-shaped clamping block is clampedly connected with the ratchet bars.

[0011] As a preferred scheme of the cable-stayed cable length adjusting device, the sliding groove is provided with a scale line.

[0012] As a preferred scheme of the cable-stayed cable length adjusting device, the lock member is provided with a first wedge-shaped through groove and a second wedge-shaped through groove in opposite directions, the first wedge-shaped through groove is wide at the top and narrow at the bottom, and the second wedge-shaped through groove is narrow at the top and wide at the bottom.

[0013] In a preferred embodiment of the cable length adjustment device of the present invention, the first wedge-shaped through groove and the second wedge-shaped through groove are provided with anti-slip teeth.

[0014] In a preferred embodiment of the cable length adjustment device of the present invention, the fixed frame has through cavities at both ends and a through groove in the middle.

[0015] The beneficial effects of this invention are as follows: This invention adjusts the length of the stay cables by adjusting the components, hoists the bridge frame, and connects the support columns and main beams through two sets of support cables to provide support for the bridge frame. A counterweight balances the load-bearing capacity at the other end of the bridge frame, thus ensuring smooth construction. Fixing the position of the stay cables by the fixing components reduces the load on the adjusting components, thereby reducing mechanical wear. The first and second guide components guide the stay cables, preventing the bridge frame from shifting during construction. The locking components fix the stay cables to one end of the bridge frame. When the stay cables become loose or deform due to prolonged use, the movement distance of the stay cables can be read through the fixing components, allowing for more precise adjustment and maintenance. The invention is simple to operate, improves construction efficiency, reduces maintenance costs, and avoids safety hazards caused by loose cables. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a cable length adjustment device according to an embodiment of this disclosure.

[0017] Figure 2 This is a schematic diagram of the fixed component structure of a cable length adjustment device according to an embodiment of the present disclosure.

[0018] Figure 3 This is a schematic diagram of the clamping rod structure of a cable length adjustment device according to an embodiment of this disclosure.

[0019] Figure 4 This is a schematic diagram of the second guide component of a cable length adjustment device according to an embodiment of the present disclosure.

[0020] Figure 5 This is a schematic diagram of the locking component 5 of a cable length adjustment device in an embodiment of this disclosure.

[0021] Figure 6 This is a schematic diagram of the fixed frame structure of a cable length adjustment device according to an embodiment of the present disclosure.

[0022] Figure 7 This is a cross-sectional view of the fixing component of a cable length adjustment device according to an embodiment of this disclosure.

[0023] Figure 8This is a locking component of a cable length adjustment device in an embodiment of the present disclosure. Figure 1 Enlarged diagram of point A in the middle.

[0024] Reference numerals: Adjusting component 1; Base 101; Motor 102; Winch 103; Fixing component 2; Fixing frame 21; Through cavity 211; Through groove 212; Fixing rod 22; Elastic reset component 23; Engaging assembly 24; Rotating rod 241; Locking rod 242; Wedge-shaped locking block 243; Rotating key 245; Slide groove 25; Ratchet 251; Scale line 252; First guide component 3; Second guide component 31; First fixed pulley 32; Second fixed pulley 33; Third fixed pulley 34; Fourth fixed pulley 311; Fifth fixed pulley 312; Cable tie 4; Locking component 5; First wedge-shaped through groove 51; Second wedge-shaped through groove 52; Anti-slip tooth 53; Support column 6; Main beam 7; Pull ring 8; Support cable 9; Cable frame 10; Counterweight block 11. Detailed Implementation

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0026] Example, refer to Figures 1-8 This embodiment provides a cable length adjustment device, including an adjustment component 1, a fixing component 2, a first guide component 3, a second guide component 31, two sets of cable 4, a locking component 5, a support column 6, a main beam 7, a pull ring 8, two sets of support cables 9, a bridge frame 10, and a counterweight 11. One end of one set of cable stays 4 is fixedly connected to the adjusting component 1, one set of cable stays 4 is engaged with the fixing component 2, the other end of one set of cable stays 4 is fixedly connected to the first guide component 3 through the locking component 5, one end of another set of cable stays 4 is fixedly connected to the counterweight block 11, the other end of another set of cable stays 4 is fixedly connected to the second guide component 31 through the locking component 5, the first guide component 3 and the second guide component 31 are respectively fixedly connected to the bridge frame 10, and the two ends of the support cable 9 are respectively fixedly connected to the support column 6 and the main beam 7 through the pull ring 8; Adjusting component 1 is used to adjust the length of the stay cable; Fixing component 2 is used to lock the stay cable and monitor the tension of the stay cable 4 in real time, so as to prevent safety hazards caused by excessive deformation of the stay cable 4. The first guide member 3 is used to guide the rope.

[0027] In this preferred embodiment, the adjusting component 1 hoists the cable tray 10 by adjusting the length of the stay cable 4. Two sets of support cables 9 connect the support column 6 and the main beam 7 to provide support for the cable tray 10. The counterweight 11 balances the load-bearing capacity at the other end of the cable tray 10, thereby ensuring smooth construction. When the cable tray 10 is placed in the appropriate position, the fixing component 2 fixes the position of the stay cable 4, which can reduce the load-bearing capacity on the adjusting component 1 and thus reduce mechanical wear. The first guide component 3 and the second guide component 31 guide the stay cable 4 to prevent the cable tray 10 from shifting during construction. The locking component 5 fixes the stay cable 4 to one end of the cable tray 10. When the stay cable 4 becomes loose or deformed due to long-term use, the moving distance of the stay cable 4 can be read through the fixing component 2, thereby adjusting and maintaining the stay cable 4 more accurately.

[0028] Reference Figure 1 The adjusting component 1 includes a base 101, a motor 102 and a winch 103. The motor 102 is fixedly connected to the base 101, the output shaft of the motor 102 is fixedly connected to the winch 103, and the winch 103 is fixedly connected to the cable 4.

[0029] In this preferred embodiment, the base 101 provides support for the motor 102, the motor 102 drives the winch 103 to rotate, and the winch 103 unwinds the cable 4, thereby hoisting the bridge frame 10 to a suitable position.

[0030] Reference Figures 1-3 The fixing component 2 includes a fixing frame 21, a fixing rod 22, an elastic reset component 23, two sets of locking components 24, and a sliding groove 25. The fixing rod 22 is fixedly connected to the cable 4 and the fixing frame 21. The fixing rod 22 extends from the fixing frame 21 and the elastic reset component 23 in sequence. The elastic reset component 23 is fixedly connected to the fixing frame 21. The locking components 24 are rotatably connected to the fixing rod 22 and are locked to the sliding groove 25.

[0031] In this preferred embodiment, when the end of the stay cable 4 pulls the bridge frame 10, it is subjected to the tension of the bridge frame 10, causing the stay cable 4 to move the fixed rod 22 upward. The elastic reset member 23 is sleeved on the outside of the fixed rod 22, with one end fixedly connected to the inner wall of the fixed frame 21, and the other end abutting against the limiting protrusion on the fixed rod 22 or the pressure-bearing member fixedly connected to the fixed rod 22. Initially, the elastic reset member 23 is in a naturally extended state. When the end of the stay cable 4 pulls the bridge frame 10, the stay cable 4 is subjected to the tension of the bridge frame 10, causing the fixed rod 22 fixedly connected to it to move upward along the through cavity 211 of the fixed frame 21. During the process, the limiting protrusion or pressure bearing member on the fixed rod 22 moves upward synchronously, generating axial compression on the elastic reset member 23 sleeved on its outer side, causing the elastic reset member 23 to undergo compression deformation and store elastic potential energy. At the same time, when the fixed rod 22 moves upward, it pulls the rotating rod 241 to rotate around the rotating key 245. During the rotation of the rotating rod 241, it pushes the locking rod 242 to slide into the through groove 212 inside the fixed frame 21. The locking rod 242 drives the wedge-shaped locking block 243 to disengage from the meshing state with the ratchet rack 251 inside the slide groove 25. At this time, the fixed component 2 releases its self-locking, making it easier for the adjusting component 1 to perform unwinding or winding operations on the cable 4.

[0032] Reference Figure 1 and Figure 4 The first guide member 3 includes a first fixed pulley 32, a second fixed pulley 33 and a third fixed pulley 34. A set of stay cables 4 passes through the first fixed pulley 32, the second fixed pulley 33 and the third fixed pulley 34 in sequence. The second guide member 31 includes a fourth fixed pulley 311 and a fifth fixed pulley 312. Another set of stay cables 4 passes through the fourth fixed pulley 311 and the fifth fixed pulley 312 in sequence. The two sets of stay cables 4 are fixedly connected to one end of the bridge.

[0033] In this preferred embodiment, the first guide member 3 and the second guide member 31 guide the stay cable to prevent tilting during the hoisting of the cable frame 10, thus ensuring the accuracy and efficiency of the construction.

[0034] Reference Figure 3 and Figure 7 The engaging assembly 24 includes a rotating rod 241, a locking rod 242, a wedge-shaped locking block 243, and a rotating key 245. One end of the rotating rod 241 is rotatably connected to the fixed rod 22, and the rotating rod 241 is rotatably connected to the rotating key 245. The rotating key 245 is fixedly connected to the fixed frame 21. The other end of the rotating rod 241 is rotatably connected to the locking rod 242. The wedge-shaped locking block 243 is fixedly connected to the locking rod 242. The locking rod 242 is slidably connected to the fixed frame 21. The wedge-shaped locking block 243 is engaged with the slide groove 25.

[0035] In this preferred embodiment, when the fixed rod 22 moves upward, it pulls the rotating rod 241 to rotate on the rotating key 245. During the rotation of the rotating rod 241, it pushes the locking rod 242 to slide inward toward the fixed frame 21. The locking rod 242 causes the wedge-shaped locking block 243 to no longer engage with the slide groove 25. When the fixed rod 22 moves downward, it pulls the rotating rod 241 to rotate counterclockwise on the rotating key 245, pushing the locking rod 242 to slide outward toward the fixed frame 21. The locking rod 242 causes the wedge-shaped locking block 243 to engage with the slide groove 25, thereby achieving self-locking and fixing the cable 4.

[0036] Reference Figure 1 and Figure 2 Two sets of ratchet racks 251 are symmetrically arranged on the inner side of the slide groove 25, and the wedge-shaped locking block 243 engages with the ratchet racks 251.

[0037] In this preferred embodiment, the ratchet 251 facilitates the adjustment of the length of the stay cable 4 and the fixing of the stay cable 4.

[0038] Reference Figure 1 and Figure 2 The slide 25 is provided with scale lines 252.

[0039] In this preferred embodiment, when the length of the stay cable 4 changes due to loosening or deformation, the distance the stay cable 4 has moved can be determined by reading the data on the scale line 252, thereby allowing for more precise adjustment of the stay cable length and precise maintenance and repair.

[0040] Reference Figure 1 and Figure 2 The locking component 5 has a first wedge-shaped through groove 51 and a second wedge-shaped through groove 52 in opposite directions. The first wedge-shaped through groove 51 is wider at the top and narrower at the bottom, while the second wedge-shaped through groove 52 is narrower at the top and wider at the bottom.

[0041] In this preferred embodiment, when the cable 4 lifts the bridge frame 10, the end section of the cable 4 will be subjected to force and squeeze the first wedge-shaped groove 51 and the second wedge-shaped groove 52. Finally, the end of the cable 4 will be knotted by the locking member 5 and locked in the first wedge-shaped groove 51 and the second wedge-shaped groove 52, thereby fixing the end of the cable 4.

[0042] Reference Figure 5 and Figure 8 The first wedge-shaped through groove 51 and the second wedge-shaped through groove 52 are provided with anti-slip teeth 53.

[0043] In this preferred embodiment, the anti-slip teeth 53 increase the friction between the stay cable 4 and the first wedge-shaped through groove 51 and the second wedge-shaped through groove 52, preventing the stay cable 4 from disengaging from the locking member 5 and improving the safety of the hoisting bridge 10.

[0044] Reference Figure 6The fixed frame 21 has through cavities 211 at both ends and through grooves 212 in the middle.

[0045] In this preferred embodiment, when the fixing rod 22 moves vertically within the fixing frame 21, it causes the locking rod 242 to slide within the through groove 212.

[0046] Working principle: The base 101 provides stable support for the motor 102. After the motor 102 starts, it drives the winch 103 to rotate. The winch 103 adjusts the length of the stay cable 4 by unwinding or rewinding, thereby realizing the hoisting operation of the cable tray 10. Two sets of support cables 9 are connected to the support column 6 and the main beam 7 respectively through the pull ring 8, providing auxiliary support force for the cable tray 10; the counterweight 11 balances the load-bearing capacity at the other end of the cable tray 10, ensuring that the construction process is carried out smoothly.

[0047] The elastic reset member 23 is sleeved on the outside of the fixed rod 22. One end of it is fixedly connected to the inner wall of the fixed frame 21, and the other end abuts against the limiting protrusion on the fixed rod 22 or the pressure-bearing member fixedly connected to the fixed rod 22. Initially, the elastic reset member 23 is in a naturally extended state. When the end of the stay cable 4 pulls the bridge frame 10, the stay cable 4 is subjected to the tension of the bridge frame 10, which drives the fixed rod 22 fixedly connected to it to move upward along the through cavity 211 of the fixed frame 21. During this process, the limiting protrusion or pressure-bearing member on the fixed rod 22 moves upward synchronously, generating axial compression on the elastic reset member 23 sleeved on its outside, causing the elastic reset member 23 to undergo compressive deformation and store elastic potential energy. At the same time, when the fixed rod 22 moves upward, it pulls the rotating rod 241 to rotate around the rotating key 245. During the rotation of the rotating rod 241, it pushes the locking rod 242 to slide into the through groove 212 inside the fixed frame 21. The locking rod 242 drives the wedge-shaped locking block 243 to disengage from the meshing state with the ratchet rack 251 inside the slide groove 25. At this time, the fixed component 2 is released from self-locking, which makes it easier for the adjusting component 1 to unwind or rewind the cable 4.

[0048] After the cable tray 10 is hoisted to the preset position and supported by other foundation structures, the tension at the end of the stay cable 4 decreases. At this time, the elastic reset member 23 releases its stored elastic potential energy, generating a downward reset thrust that pushes the fixing rod 22 downward along the cavity 211. As the fixing rod 22 moves downward, it pulls the rotating rod 241 to rotate counterclockwise around the rotating key 245. The rotating rod 241 pushes the locking rod 242 to slide outward of the fixing frame 21. The locking rod 242 drives the wedge-shaped locking block 243 to re-engage with the ratchet rack 251 inside the slide groove 25, realizing the self-locking function of the fixing member 2, thereby firmly fixing the position of the stay cable 4. This fixing method can effectively reduce the load on the winch 103, reduce mechanical wear, and reduce maintenance costs.

[0049] The first fixed pulley 32, second fixed pulley 33, and third fixed pulley 34 of the first guide member 3 work together with the fourth fixed pulley 311 and fifth fixed pulley 312 of the second guide member 31 to guide and limit the two sets of stay cables 4 respectively, preventing the cable frame 10 from shifting during hoisting and ensuring construction accuracy and efficiency. The locking member 5 fixes the end of the stay cable 4 through the first wedge-shaped through groove 51 and the second wedge-shaped through groove 52. When the stay cable 4 is under force, its end will squeeze the two wedge-shaped through grooves in opposite directions and eventually be knotted and locked in the through grooves. The anti-slip teeth 53 on the inner wall of the through groove increase the friction and prevent the stay cable 4 from detaching from the locking member 5, thus improving the safety of hoisting.

[0050] When the locking component 5 becomes loose or the stay cable 4 deforms due to long-term use, causing a change in length, the movement distance of the fixing rod 22 can be accurately obtained by reading the data on the scale line 252 on the slide groove 25. This allows for the calculation of the length change of the stay cable 4, providing data support for precise adjustment and maintenance of the stay cable 4. This device is easy to operate, efficiently adjusting the length of the stay cable and monitoring its changes in real time. It helps improve construction efficiency, reduce maintenance costs, and avoid safety hazards caused by loose cables.

Claims

1. A cable length adjustment device, characterized in that: It includes an adjusting component (1), a fixing component (2), a first guiding component (3), a second guiding component (31), two sets of stay cables (4), a locking component (5), a support column (6), a main beam (7), a pull ring (8), two sets of support cables (9), a cable tray (10), and a counterweight (11). One end of one set of cable stays (4) is fixedly connected to an adjusting member (1), one set of cable stays (4) is engaged with a fixing member (2), the other end of one set of cable stays (4) is fixedly connected to a first guide member (3) via a locking member (5), one end of another set of cable stays (4) is fixedly connected to a counterweight (11), the other end of another set of cable stays (4) is fixedly connected to a second guide member (31) via a locking member (5), the first guide member (3) and the second guide member (31) are respectively fixedly connected to the bridge frame (10), and the two ends of the support cable (9) are respectively fixedly connected to the support column (6) and the main beam (7) via pull rings (8); The adjusting component (1) is used to adjust the length of the stay cable; The fixing component (2) is used to lock the cable and monitor the tension of the cable (4) in real time, so as to avoid the cable (4) from causing safety hazards due to excessive deformation. The first guide member (3) is used to guide the rope.

2. The cable length adjustment device as described in claim 1, characterized in that: The adjusting component (1) includes a base (101), a motor (102) and a winch (103). The motor (102) is fixedly connected to the base (101), the output shaft of the motor (102) is fixedly connected to the winch (103), and the winch (103) is fixedly connected to the cable (4).

3. The cable length adjustment device as described in claim 1, characterized in that: The fixing component (2) includes a fixing frame (21), a fixing rod (22), an elastic reset component (23), two sets of locking components (24) and a sliding groove (25). The fixing rod (22) is fixedly connected to the cable (4), the fixing rod (22) is fixedly connected to the fixing frame (21), the fixing rod (22) extends out of the fixing frame (21) and the elastic reset component (23) in sequence, the elastic reset component (23) is fixedly connected to the fixing frame (21), the locking component (24) is rotatably connected to the fixing rod (22), and the locking component (24) locks into the sliding groove (25).

4. The cable length adjustment device as described in claim 1, characterized in that: The first guide member (3) includes a first fixed pulley (32), a second fixed pulley (33) and a third fixed pulley (34). One set of the stay cables (4) passes around the first fixed pulley (32), the second fixed pulley (33) and the third fixed pulley (34) in sequence. The second guide member (31) includes a fourth fixed pulley (311) and a fifth fixed pulley (312). Another set of the stay cables (4) passes around the fourth fixed pulley (311) and the fifth fixed pulley (312) in sequence. The two sets of stay cables (4) are fixedly connected to one end of the bridge.

5. The cable length adjustment device as described in claim 3, characterized in that: The engaging assembly (24) includes a rotating rod (241), a locking rod (242), a wedge-shaped locking block (243), and a rotating key (245). One end of the rotating rod (241) is rotatably connected to a fixed rod (22), and the rotating rod (241) is rotatably connected to the rotating key (245). The rotating key (245) is fixedly connected to a fixed frame (21). The other end of the rotating rod (241) is rotatably connected to the locking rod (242). The wedge-shaped locking block (243) is fixedly connected to the rotating rod (241). The locking rod (242) is slidably connected to the fixed frame (21), and the wedge-shaped locking block (243) is engaged with a sliding groove (25).

6. The cable length adjustment device as described in claim 5, characterized in that: Two sets of ratchet racks (251) are symmetrically arranged on the inner side of the slide groove (25), and the wedge-shaped locking block (243) engages with the ratchet racks (251).

7. The cable length adjustment device as described in claim 3, characterized in that: The groove (25) is provided with scale lines (252).

8. The cable length adjustment device as described in claim 1, characterized in that: The locking member (5) has a first wedge-shaped through groove (51) and a second wedge-shaped through groove (52) in opposite directions. The first wedge-shaped through groove (51) is wider at the top and narrower at the bottom, while the second wedge-shaped through groove (52) is narrower at the top and wider at the bottom.

9. The cable length adjustment device as described in claim 8, characterized in that: The first wedge-shaped through groove (51) and the second wedge-shaped through groove (52) are provided with anti-slip teeth (53).

10. The cable length adjustment device as described in claim 3, characterized in that: The fixed frame (21) has through cavities (211) at both ends and through grooves (212) in the middle.

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