Steel wire rope connection tensioning clamp

Abstract

The utility model discloses a steel wire rope connection tensioning clamp which comprises a lower framework and an upper framework which are rotationally connected, a driving assembly used for adjusting the distance between the lower framework and the upper framework is arranged between the lower framework and the upper framework, and cambered surface cushion blocks connected with a steel wire rope are arranged at the end of the lower framework and the end of the upper framework. A strain gauge type sensor is further arranged on the lower framework and located on one side of the cambered surface cushion block. The upper framework and the lower framework which can rotate to adjust the distance are designed, the cambered surface cushion blocks connected with the steel wire rope are arranged at the ends of the upper framework and the lower framework, the steel wire rope is pre-tightened by adjusting the distance between the two frameworks, the connecting and assembling problem of the steel wire rope can be easily solved, the steel wire rope does not need to be manually tensioned, and the labor intensity of workers is reduced. And the pre-tightening force of the steel wire rope during assembly can be accurately controlled through the strain gauge type sensor, and a tension sensor does not need to be additionally arranged in the mechanism.

Description

Technical Field

[0001] This utility model relates to the field of wire rope assembly technology, specifically to a wire rope connection tensioning pliers. Background Technology

[0002] Wire rope drive is a mechanical transmission method that relies on the friction between a rope tightly wound around a grooved reel to transmit power and motion. Its main advantages include: the ability to transmit rotational and linear motion between parallel shafts or shafts at arbitrary positions over long distances; simple structure and easy manufacturing of transmission components; and smooth, noiseless, vibration-free, and shock-free transmission. Wire rope drives have important applications in the mechanical field, especially in humanoid robot joint transmission and aircraft wing control surfaces.

[0003] Wire rope drives often require splicing two wire ropes together. There are generally two problems with this: First, it's difficult to assess the preload of the wire ropes. Pulling them too loosely will compromise transmission accuracy, while pulling them too tight by hand is difficult and requires precise control of the force. Second, it's hard to accurately determine the required length at the splice point. In some cases, the wire ropes need to be cut; if they're too short, they can't be spliced, and if they're too long, preload cannot be achieved, leading to inaccurate transmission. Utility Model Content

[0004] The technical problem to be solved by this utility model is: how to solve the problem that the pretension of steel wire rope is not easy to assess and adjust.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A wire rope connection tensioning clamp includes a lower frame and an upper frame that are rotatably connected. A drive assembly for adjusting the distance between the lower frame and the upper frame is provided between them. Arc-shaped pads connected to the wire rope are provided at the ends of both the lower frame and the upper frame. A strain gauge sensor is also provided on the lower frame and on one side of the arc-shaped pad.

[0007] This application designs an upper and lower frame with adjustable spacing, and sets arc-shaped pads at the ends of both frames to connect with the wire rope. By adjusting the distance between the two frames, the wire rope can be pre-tightened, which can easily solve the problem of wire rope connection and assembly. The wire rope does not need to be manually tightened. The wire rope pre-tightening force during assembly can also be precisely controlled by strain gauge sensors, eliminating the need to add tension sensors to the mechanism.

[0008] As a further embodiment of this utility model: the drive assembly includes nuts movably mounted inside the lower frame and the upper frame, and a screw connecting the two nuts, wherein the thread directions of the upper and lower ends of the screw that contact the two nuts are opposite.

[0009] As a further embodiment of this utility model: both sides of the two nuts are provided with lugs, which can be movably connected to the trunnion holes opened on the lower frame and the upper frame.

[0010] As a further embodiment of this utility model, torsion bars are provided at both ends of the screw, which are perpendicular to the screw.

[0011] As a further embodiment of this utility model: the top of the arc-shaped pad is a smooth arc-shaped surface, and a groove for guiding the steel wire rope is opened on one side of the arc-shaped pad, the spacing of the groove being greater than the diameter of the steel wire rope.

[0012] As a further embodiment of this utility model: both the lower frame and the upper frame are arc-shaped structures, and the ends of the two that are away from the arc surface pad are connected by a pin.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] First, this application designs an upper and lower frame that can rotate and adjust the spacing, and sets arc-shaped pads at the ends of both frames to connect with the wire rope. By adjusting the distance between the two frames, the wire rope can be pre-tightened, which can easily solve the problem of wire rope connection and assembly. There is no need to manually tighten the wire rope. The wire rope pre-tightening force during assembly can also be accurately controlled by strain gauge sensors, eliminating the need to add tension sensors to the mechanism.

[0015] Secondly, this application connects the lugs on both sides of the nut to the trunnion holes on the corresponding skeleton. The lug nut can rotate around the trunnion holes. The two ends of the screw are left and right turn screws. When tightening, not only is the efficiency improved, but the symmetrical arrangement can also be ensured, so that the screw will not affect the rotation of the upper and lower skeletons around the pin.

[0016] Finally, by setting arc-shaped pads at the ends of both the upper and lower frames, this application ensures that the wire rope remains in a straight line when the lower and upper frames gradually close. That is, the wire rope will adaptively slide in the groove on the arc-shaped pad according to the closing of the upper and lower frames. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the steel wire rope connection tensioning pliers in Embodiment 1 of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure after the wire rope and the threaded rod are connected in Embodiment 1 of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure after the wire rope and the threaded rod are connected in Embodiment 2 of this utility model;

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Threaded cylindrical head; 101. Wire rope ball head; 2. Wire rope; 3. Arc-shaped pad; 4. Strain gauge sensor; 5. Lower frame; 6. Nut; 7. Screw; 8. Pin; 9. Upper frame; 10. Torsion bar; 11. Trunnion hole; 12. Threaded rod. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] Example 1

[0024] Reference Figure 1 and Figure 2 A wire rope connection tensioning clamp includes an arc-shaped pad 3, a strain gauge sensor 4, a lower frame 5, a nut 6, a screw 7, a pin 8, an upper frame 9, a torsion bar 10, a trunnion hole 11, and a threaded rod 12.

[0025] Both the upper frame 9 and the lower frame 5 are arc-shaped plate structures with opposite concave directions. The upper frame 9 and the lower frame 5 are made of concave plates. One end of the upper frame 9 and the lower frame 5 are rotatably connected by a pin 8. The other end of the upper frame 9 and the lower frame 5 is provided with an arc-shaped pad 3 in the concave groove. At the other end of the lower frame 5 and on one side of the arc-shaped pad 3, a strain gauge sensor 4 is also provided. When the lower frame 5 is under stress, it will have slight deformation. The strain gauge sensor 4 will detect the strain force and accurately measure the tension of the two steel wire ropes through mathematical relationships, so as to keep the rope pretension at a reasonable value.

[0026] Reference Figure 1 The bottom of the arc-shaped pad 3 is placed in the concave groove of the corresponding frame. The inlet end of the pad is provided with a groove for introducing the wire rope 2. The width of the groove is greater than the diameter of the wire rope 2 and smaller than the diameter of the wire rope ball head 101 or the threaded cylindrical head 1 at the head of the wire rope 2. Therefore, it can block the wire rope ball head 101 or the threaded cylindrical head 1 at the head of the wire rope 2. The corresponding frame is also provided with a groove for introducing the wire rope.

[0027] Furthermore, the top of the curved pad 3 is curved, so that when the lower frame 5 and the upper frame 9 gradually close, the design of the curved pad 3 can ensure that the upper and lower steel wire ropes 2 are still in a straight line (e.g., Figure 1 As shown in the figure, the two steel wire ropes 2 will slide adaptively in the groove on the arc-shaped pad according to the closing of the lower skeleton 5 and the upper skeleton 9.

[0028] Reference Figure 1 Two sets of nuts 6 are provided, and the whole is trapezoidal. One end is placed in the concave groove of the lower skeleton 5 or the lower skeleton 9. Both ends are provided with ears. The ears at both ends can be movably inserted into the trunnion holes 11 opened on the lower skeleton 5 or the lower skeleton 9, that is, the ears at both ends can rotate in the trunnion holes 11. The upper and lower nuts 6 are threadedly connected to the screw rod 7. The threads of the upper and lower ends of the screw rod 7 that contact the two nuts 6 are opposite. Torsion bars 10 are provided at both ends of the screw rod 7, which are perpendicular to the screw rod 7.

[0029] Therefore, the trapezoidal lug nut 6 can rotate around the trunnion holes of the upper skeleton 9 and the lower skeleton 5. Turning the torsion bar 10 clockwise will pull the upper and lower trapezoidal lug nuts 6 closer together, thereby shortening the distance between the upper skeleton 9 and the lower skeleton 5 for pre-tensioning of the two wire ropes 2.

[0030] Reference Figure 1 and Figure 2 ,

[0031] When the head of the wire rope 2 is a wire rope ball head 101;

[0032] First, the wire rope ball ends 101 need to be secured in the upper and lower arc-shaped pads 3, some of which are pre-threaded. Then, twist the torsion bar 10, which is inserted into the screw 7. Twisting the torsion bar 10 will cause the screw 7 to rotate. The screw 7 has left-hand and right-hand threaded rods at both ends, which are screwed into the trapezoidal lug nuts 6. The trapezoidal lug nuts 6 can rotate around the trunnion holes 11 of the upper skeleton 9 and the lower skeleton 5. Twisting the torsion bar 10 clockwise will cause the screw 7 to pull the two trapezoidal lug nuts 6 closer together, which will cause the lower skeleton 5 and the upper skeleton 9 to rotate inward around the pin 8. The ends of the wire rope ball ends 101 will move closer together, and the wire rope will be tightened.

[0033] Then, take the threaded rod 12. In this embodiment, the two ends of the threaded rod 12 are provided with ball head mounting parts for connecting the two wire rope ball heads 101. After the two rope ends are brought close together, tighten the connecting screw 12 to connect the upper and lower sections of the wire rope 2. As the connecting threaded rod 12 is tightened, the reading of the strain gauge sensor 4 will gradually decrease from the peak value. When it just decreases to 0N, it means that the preload of the wire rope is the peak value measured by the strain gauge sensor 4. In addition, conversely, this tool can also be used to detect the tension of the wire rope ends.

[0034] When the frame 5 is under stress, it will undergo slight deformation. The strain gauge sensor 4 will detect the strain force and accurately measure the tension of the two steel wire ropes through mathematical relationships. This keeps the rope pretension at a reasonable value and is mainly used for testing mechanisms or determining the exact length of the steel wire rope.

[0035] Example 2

[0036] Reference Figure 3 Unlike Example 1, Example 2 shows a wire rope end with a threaded cylindrical head 1. The two ends of the connecting threaded rod 12 have left-hand and right-hand threads respectively. After the two rope ends are brought close together, tightening the connecting rod 12 connects the upper and lower sections of the wire rope 2. As the connecting threaded rod 12 tightens, the reading of the strain gauge sensor 4 gradually decreases from its peak value. When it just decreases to 0N, it indicates that the preload of the wire rope is the peak value measured by the strain gauge sensor 4. Conversely, this tool can also be used to detect the tension of the wire rope end.

[0037] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A wire rope connection tensioning clamp, characterized in that, The system includes a lower frame (5) and an upper frame (9) that are rotatably connected. A drive assembly for adjusting the distance between the lower frame (5) and the upper frame (9) is provided between them. Arc-shaped pads (3) connected to wire ropes are provided at the ends of both the lower frame (5) and the upper frame (9). A strain gauge sensor (4) is also provided on the lower frame (5) and on one side of the arc-shaped pads (3).

2. The wire rope connection tensioning pliers according to claim 1, characterized in that: The drive assembly includes a nut (6) movably mounted inside the lower frame (5) and the upper frame (9), and a screw (7) connecting the two nuts (6), wherein the upper and lower ends of the screw (7) have opposite thread directions in contact with the two nuts (6).

3. The wire rope connection tensioning pliers according to claim 2, characterized in that: Both nuts (6) are provided with lugs on both sides, and the lugs can be movably connected to the trunnion holes (11) opened on the lower frame (5) and the upper frame (9).

4. The wire rope connection tensioning pliers according to claim 2, characterized in that: Both ends of the screw (7) are provided with torsion bars (10) that are perpendicular to the screw (7).

5. The wire rope connection tensioning pliers according to claim 1, characterized in that: The top of the arc-shaped pad (3) is a smooth arc-shaped surface. A slot for guiding the wire rope is provided on one side of the arc-shaped pad (3). The spacing of the slot is greater than the diameter of the wire rope.

6. The wire rope connection tensioning pliers according to claim 1, characterized in that: Both the lower frame (5) and the upper frame (9) are arc-shaped structures, and the ends of the two that are away from the arc surface pad (3) are connected by a pin (8).

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