An adjustment structure for a sling and the sling itself.

Abstract

This utility model discloses an adjustment structure and sling for a sling. The adjustment structure includes an inner sleeve, an outer sleeve, and a ball joint mechanism for connecting the anchor cup and the fork lug of the sling. The ball joint mechanism includes a large end section and a tie rod section that are fixedly connected. The outer wall of the anchor cup and the inner wall of the inner sleeve are provided with a matching first thread structure. The outer wall of the inner sleeve and the inner wall of the outer sleeve are provided with a matching second thread structure. The first and second thread structures have opposite directions. One end of the inner sleeve is fitted onto the outside of the anchor cup and connected by a thread. One end of the outer sleeve is fitted onto the outside of the other end of the inner sleeve and connected by a thread. The other end of the outer sleeve has a through hole with an inner diameter larger than the outer diameter of the tie rod section and smaller than the outer diameter of the large end section. The large end section is installed inside the outer sleeve, and the tie rod section passes through the through hole and connects to the fork lug. The adjustment structure and sling disclosed in this utility model can reduce the risk of anchor cup breakage and achieve large-length adjustment of the sling through the dual adjustment of the inner and outer sleeves.

Description

Technical Field

[0001] This utility model relates to the field of bridge suspension cable technology, and in particular to an adjustment structure and suspension cable of a suspension cable. Background Technology

[0002] Conventional wire rope slings typically use a pin-connected connection at the upper end to the cable clamp, while the lower end can be either an anchor head connection or an anchor head pin-connected connection. In the anchor head pin-connected structure, the lower end of the wire rope is directly anchored to the anchor cup via anchoring material. The anchor cup has external threads that can engage with the internal threads of the lug plate. During installation, the lug plate at the lower end of the sling is connected to the bridge deck lug via a pin. By screwing in or out of the thread, the sling length can be adjusted. However, this structure does not allow for sling length adjustment after installation. To address this issue, existing technology adds an adjusting rod with threads at both ends between the anchor cup and the lug. The sling length is adjusted by rotating the adjusting rod. For example, Chinese Patent CN216074748. U discloses a space cable structure sling, including an upper fork lug assembly, a first ball joint rotating device, a cable, and a lower connecting device, wherein: the lower part of the upper fork lug assembly is connected to the upper part of the first ball joint rotating device; the lower part of the first ball joint rotating device is connected to the upper part of the cable; the lower connecting device is connected to the lower part of the cable, and further includes an adjusting sleeve, which is threaded to the cable and a second ball joint rod respectively. Specifically, one end of the adjusting sleeve is threaded to the internal thread at the bottom of the anchor cup, and the other end is connected to the second ball joint rod. Due to the connection method of this prior art, the lower end of the anchor cup needs to be extended to add an internal threaded hole, which increases the size of the anchor and leads to increased anchor rigidity. Under long-term dynamic load, the anchor is prone to breakage. In addition, when the length of the anchor is long, the length of the sling will decrease accordingly, affecting the performance of the sling. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides an adjustment structure and sling for a sling, aiming to solve the problems in the prior art where the adjustment mechanism of the sling requires the addition of an internal threaded hole at the lower end of the anchor cup, which increases the size of the anchor and leads to increased rigidity. Under long-term dynamic loads, the anchor is prone to breakage. At the same time, the increase in the size of the anchor will lead to a decrease in the length of the sling, affecting the performance of the sling.

[0004] The present invention achieves the above objectives by adopting the following technical solution:

[0005] An adjustment structure for a sling is provided for connecting an anchor cup and a corresponding fork lug of the sling. The adjustment structure includes an inner sleeve, an outer sleeve, and a ball joint mechanism. The ball joint mechanism includes a large end section and a tie rod section fixedly connected. The outer wall of the anchor cup and the inner wall of the inner sleeve are provided with a first threaded structure that matches each other. The outer wall of the inner sleeve and the inner wall of the outer sleeve are provided with a second threaded structure that matches each other. The first threaded structure and the second threaded structure have opposite directions. One end of the inner sleeve is fitted onto the outside of the anchor cup and connected by a thread. One end of the outer sleeve is fitted onto the outside of the other end of the inner sleeve and connected by a thread. The other end of the outer sleeve is provided with a through hole. The inner diameter of the through hole is larger than the outer diameter of the tie rod section and smaller than the outer diameter of the large end section. The large end section is installed inside the outer sleeve, and the tie rod section passes through the through hole and connects to the fork lug.

[0006] In this technical solution, on the one hand, the inner sleeve is fitted onto the outside of the anchor cup through the first threaded structure, which reduces the size of the anchor cup compared to the prior art and lowers the risk of the anchor cup breaking under long-term dynamic loads; on the other hand, an outer sleeve is fitted onto the outside of the inner sleeve through a second threaded structure with the opposite thread direction to the first threaded structure, which allows for dual adjustment during the installation of the sling and enables large-length adjustment of the sling; in addition, the adjustment structure of this technical solution can be constructed on the bridge deck without being limited by the tensioning space, which can improve the convenience and flexibility of construction.

[0007] A further technical solution is that the inner wall of the end of the outer sleeve with the through hole is a concave arc-shaped surface, and the large end section has a matching convex arc-shaped surface. In this technical solution, the inner diameter of the through hole is larger than the outer diameter of the tie rod section, and the outer sleeve and the large end section have matching arc-shaped surfaces, enabling the ball joint mechanism to swing at a small angle and preventing the matching threaded structure in the tensioning adjustment structure from jamming.

[0008] A further technical solution includes an adjusting wrench, wherein the outer wall of the outer sleeve is provided with a groove that mates with the adjusting wrench.

[0009] A further technical solution involves providing a reaction step in the outer sleeve for use with the tensioning fixture. This solution enables rapid installation of the tensioning fixture, further improving construction efficiency.

[0010] A further technical solution is that the pull rod section is provided with an external thread structure, and the fork lug is provided with a threaded hole that mates with it.

[0011] A sling includes a sling body, an upper anchor cup at the upper end of the sling body, an upper fork lug connected to the upper anchor cup by a thread, a lower anchor cup at the lower end of the sling body, a lower fork lug corresponding to the lower anchor cup, and the aforementioned adjustment structure, wherein the adjustment structure is used to connect the lower anchor cup and the lower fork lug.

[0012] The beneficial effects of this utility model are:

[0013] This utility model provides an adjustable sling and a sling. An inner sleeve is fitted onto the outside of the anchor cup via a first threaded structure, reducing the size of the anchor cup compared to existing technologies and lowering the risk of breakage under long-term dynamic loads. An outer sleeve is fitted onto the inner sleeve via a second threaded structure with the opposite direction to the first threaded structure. The outer sleeve is then connected to a fork lug via a ball joint mechanism. During installation, the sling's length can be adjusted through the dual adjustment of the inner and outer sleeves. Furthermore, this utility model's adjustable structure can be constructed on the bridge deck, without being limited by the tensioning space, improving construction convenience and flexibility. The ball joint mechanism can swing at a small angle relative to the outer sleeve, avoiding jamming of the mating threaded structure during tensioning. A reaction structure on the outer sleeve allows for rapid installation of the tensioning fixture, further improving construction efficiency. Attached Figure Description

[0014] Figure 1 Here is a schematic diagram of a sling with the adjustment structure described in this utility model.

[0015] Figure 2 See: A cross-sectional view of the sling with the adjustment structure described in this utility model.

[0016] Figure 3 Here is a schematic diagram of the structure of the inner sleeve described in this utility model.

[0017] Figure 4 See: A schematic diagram of the structure of the outer sleeve of this utility model.

[0018] Figure 5 Here is a schematic diagram of the ball joint mechanism described in this utility model.

[0019] In the picture:

[0020] 1. Cable body; 11. Lower anchor cup; 12. Upper anchor cup; 21. Lower fork lug; 22. Upper fork lug; 3. Inner sleeve; 31. Right-hand internal thread; 32. Left-hand external thread; 4. Outer sleeve; 40. Through hole; 41. Left-hand internal thread; 42. Concave arc surface; 43. Groove; 5. Ball joint mechanism; 51. Large end section; 511. Convex arc surface; 52. Tie rod section; 521. External thread. Detailed Implementation

[0021] The following is in conjunction with the appendix Figures 1 to 5 The present invention will be described in detail below with specific embodiments. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0022] like Figures 1 to 5As shown, this embodiment provides an adjustment structure for a sling, used to connect the lower anchor cup 11 of the sling to the corresponding lower fork lug 21; the adjustment structure includes an inner sleeve 3, an outer sleeve 4, and a ball joint mechanism 5; the ball joint mechanism 5 includes a large end section 51 and a pull rod section 52 fixedly connected; the outer wall of the lower anchor cup 11 and the inner wall of the inner sleeve 3 are provided with a matching first thread structure; the outer wall of the inner sleeve 3 and the inner wall of the outer sleeve 4 are provided with a matching second thread structure; the first thread structure and the second thread structure have opposite directions; one end of the inner sleeve 3 is sleeved on the outside of the lower anchor cup 11 and connected by threads, one end of the outer sleeve 4 is sleeved on the outside of the other end of the inner sleeve 3 and connected by threads, the other end of the outer sleeve 4 is provided with a through hole 40, the inner diameter of the through hole 40 is larger than the outer diameter of the pull rod section 52 and smaller than the outer diameter of the large end section 51; the large end section 51 is installed inside the outer sleeve 4, and the pull rod section 52 passes through the through hole 40 and is connected to the lower fork lug 21.

[0023] Specifically, the bottom end of the pull rod section 52 is provided with an external thread 521, and the lower fork lug 21 is provided with a threaded hole that mates with it. The ball joint mechanism 5 is connected to the lower fork lug 21 through the above-mentioned threaded structure. The first threaded structure includes a right-hand external thread on the outer wall of the lower anchor cup 11 and a right-hand internal thread 31 on the inner wall of the inner sleeve 3. The second threaded structure includes a left-hand external thread 32 on the outer wall of the inner sleeve 3 and a left-hand internal thread 41 on the inner wall of the outer sleeve. The lower anchor cup 11 is connected to the lower fork lug 21 in an adjustable manner through the inner sleeve 3, the outer sleeve 4, and the ball joint mechanism 5 in sequence. The outer sleeve 3 is fitted onto the outside of the lower anchor cup 11 via a right-hand threaded structure, which reduces the size of the anchor cup compared to existing technologies and lowers the risk of the anchor cup breaking under long-term dynamic loads. The outer sleeve 4 is fitted onto the outside of the inner sleeve 3 via a left-hand threaded structure. The outer sleeve 4 is then connected to the lower fork lug 21 via a ball joint mechanism 5, which allows for the adjustment of the cable length through the dual adjustment of the inner and outer sleeves. In addition, the adjustment structure of this embodiment can be constructed on the bridge deck without being limited by the tensioning space, which can improve the convenience and flexibility of construction.

[0024] The above embodiments exemplarily illustrate the specific helix directions of the first and second threaded structures, the specific connection method between the ball joint mechanism 5 and the lower fork lug 21, and the specific installation position of the adjusting structure. In other embodiments or practical applications, other methods can be used instead. For example, regarding the first and second threaded structures, the first threaded structure is a left-hand thread and the second threaded structure is a right-hand thread; regarding the connection between the ball joint mechanism 5 and the lower fork lug 21, the tie rod section 52 can be designed as a mating structure with a threaded hole at the bottom and an external thread on the lower fork lug 21; regarding the installation position of the adjusting structure, the adjusting structure can also be installed between the upper anchor cup 12 and the upper fork lug 22 of the sling.

[0025] In another embodiment, based on the above embodiment, the outer sleeve 4 has an inner wall with a concave arc-shaped surface 42 at one end of the through hole 40, and the large end section 51 has a convex arc-shaped surface 511 that matches it. The inner diameter of the through hole 40 is larger than the outer diameter of the tie rod section 52, and the inner diameter of the outer sleeve 4 is larger than the outer diameter of the large end section 51. The outer sleeve 4 and the large end section 51 also have matching arc-shaped surfaces, enabling the ball joint mechanism 5 to swing at a small angle and preventing the matching threaded structure in the tensioning adjustment structure from jamming.

[0026] In another embodiment, based on the above embodiment, the outer wall of the outer sleeve 4 is provided with a groove 43 for cooperating with the adjusting wrench, so as to facilitate the adjustment structure and thus adjust the length of the sling.

[0027] In another embodiment, based on the above embodiment, the outer sleeve 4 is further provided with a reaction step for cooperating with the tensioning fixture. In this embodiment, this is specifically the bottom end face of the outer sleeve 4, which engages with the plate-like structure of the tensioning fixture to form a reaction step. This allows for rapid installation of the tensioning fixture and further improves construction efficiency. In other embodiments or practical applications, an annular boss can also be added to the outer wall of the outer sleeve 4 for engaging with the tensioning fixture.

[0028] In another embodiment, based on the above embodiment, a sling is provided, including a sling body 1, an upper anchor cup 12 at the upper end of the sling body 1, an upper fork lug 22 threadedly connected to the upper anchor cup 12, a lower anchor cup 11 at the lower end of the sling body 1, a lower fork lug 21 corresponding to the lower anchor cup 11, and an adjustment structure as described in the above embodiment. Specifically, the outer wall of the upper anchor cup 12 is provided with external threads, and the upper fork lug 22 is provided with a threaded hole that mates with it. The installation method is as follows:

[0029] 1. After the cable body 1 is ready, anchor the steel wires in the cable body 1 into the upper anchor cup 12 and lower anchor cup 11 at the upper and lower ends respectively, according to the technical requirements.

[0030] 2. After the upper fork lug 22 and the lower fork lug 21 are ready, the upper anchor cup 12 is connected to the upper fork lug 22 through a threaded structure; the lower anchor cup 11 is connected to one end of the inner sleeve 3 through a first threaded structure, and then the ball joint structure 5 is inserted from the large end (the end opposite to the through hole) of the outer sleeve 4, so that the pull rod section 52 passes through the through hole 40 and the large end section 51 is engaged with the upper end of the through hole 40. The other end of the inner sleeve 3 is connected to the outer sleeve 4 through a second threaded structure, and the lower end of the pull rod section 5 is then connected to the lower fork lug 21 through a thread.

[0031] 3. The upper and lower fork lugs are connected to the corresponding lug plates via pins, thus completing the installation of the sling.

[0032] This utility model provides an adjustable sling and a sling. An inner sleeve 3 is fitted onto the outside of a lower anchor cup 11 via a first threaded structure, reducing the size of the anchor cup compared to existing technologies and lowering the risk of breakage under long-term dynamic loads. An outer sleeve 4 is fitted onto the outside of the inner sleeve 3 via a second threaded structure with the opposite direction to the first threaded structure. The outer sleeve 4 is then connected to a lower fork lug 21 via a ball joint mechanism 5. This dual adjustment of the inner and outer sleeves allows for adjustment of the sling's length. Furthermore, this adjustable structure can be constructed on the bridge deck, without being limited by tensioning space, improving construction convenience and flexibility. The ball joint mechanism 5 can swing at a small angle relative to the outer sleeve 4, avoiding jamming of the mating threaded structure during tensioning. The outer sleeve 4 is equipped with a reaction structure, enabling rapid installation of tensioning fixtures and further improving construction efficiency.

Claims

1. An adjustment structure for a sling, characterized in that, Anchor cups used to connect slings to corresponding fork lugs; The adjustment structure includes an inner sleeve, an outer sleeve, and a ball joint mechanism; the ball joint mechanism includes a large end section and a pull rod section that are fixedly connected. The outer wall of the anchor cup and the inner wall of the inner sleeve are provided with a matching first thread structure; the outer wall of the inner sleeve and the inner wall of the outer sleeve are provided with a matching second thread structure; the first thread structure and the second thread structure have opposite directions. One end of the inner sleeve is fitted onto the outside of the anchor cup and connected by threads. One end of the outer sleeve is fitted onto the outside of the other end of the inner sleeve and connected by threads. The other end of the outer sleeve is provided with a through hole. The inner diameter of the through hole is larger than the outer diameter of the tie rod section and smaller than the outer diameter of the large end section. The large end section is installed inside the outer sleeve, and the pull rod section is connected to the fork lug through the through hole.

2. The sling adjustment structure according to claim 1, characterized in that, The inner wall of the outer sleeve with the through hole is a concave arc-shaped surface, and the large end section has a convex arc-shaped surface that matches it.

3. The sling adjustment structure according to claim 1, characterized in that, It also includes an adjusting wrench, and the outer wall of the outer sleeve is provided with a groove that mates with the adjusting wrench.

4. The sling adjustment structure according to claim 1, characterized in that, The outer sleeve is also provided with a reaction step for cooperating with the tensioning fixture.

5. The sling adjustment structure according to claim 1, characterized in that, The pull rod section is provided with an external thread structure, and the fork lug is provided with a threaded hole that mates with it.

6. A sling, characterized in that, The cable includes a cable body, an upper anchor cup at the upper end of the cable body, an upper fork lug connected to the upper anchor cup by a thread, a lower anchor cup at the lower end of the cable body, a lower fork lug corresponding to the lower anchor cup, and an adjustment structure as described in any one of claims 1 to 5, wherein the adjustment structure is used to connect the lower anchor cup and the lower fork lug.

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