Tensioner with tension force display

Abstract

The utility model provides a kind of tensioner with tension display, comprising: device main body, one end of device main body is connected with screw rod;Tension display, tension display is set to the one end of device main body away from screw rod, and tension display includes mounting seat and the tension indicating rod of being worn in mounting seat, and tension indicating rod extends along the extension direction of screw rod, and tension indicating rod is provided with tension scale line, and tension indicating rod is slidably connected with mounting seat.The tensioner with tension display in the utility model solves the technical problem that the actual tension of flexible guide rail cannot be accurately quantified in the process of regulating the tightness of flexible guide rail in the related art.

Description

Technical Field

[0001] This utility model relates to the technical field of anti-fall tensioning devices, specifically to a tensioning device with a tension force display. Background Technology

[0002] The tensioning device is a key adjusting component connecting the end of the fall arrestor flexible guide rail. It is used to precisely control the tightness of the flexible guide rail. Current technology mainly adjusts the length by screwing in threads, but this process relies on the operator's experience and judgment, making it impossible to accurately quantify the actual tension of the flexible guide rail. This can lead to the flexible guide rail being too loose, resulting in insufficient preload and affecting safety performance, or it can lead to the flexible guide rail being too tight, resulting in excessive stretching and shortening its service life. Therefore, the inability to accurately quantify the actual tension of the flexible guide rail results in problems such as low adjustment accuracy and potential safety hazards.

[0003] Therefore, existing technologies need further development. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a tensioning device with a tension force display to solve the technical problem in the related technology that the actual tension force of the flexible guide rail cannot be accurately quantified in the process of adjusting the tightness of the flexible guide rail.

[0005] To achieve the above technical objectives, the present invention adopts the following technical solution: a tensioning device with a tension force display is provided, comprising: a device body, one end of which is connected to a screw; a tension force display, which is disposed at the end of the device body away from the screw, the tension force display including a mounting base and a tension force indicator rod passing through the mounting base, the tension force indicator rod extending along the extension direction of the screw, the tension force indicator rod having tension force scale lines, and the tension force indicator rod being slidably connected to the mounting base.

[0006] Furthermore, the tension indicator includes an elastic element that is sleeved on the tension indicator rod. One end of the elastic element abuts against the end of the device body away from the screw, and the other end of the elastic element abuts against a first stop component fixed on the tension indicator rod.

[0007] Furthermore, the mounting base has a mounting hole, and the tension indicator rod includes a first rod with tension scale lines. The cross-sectional shape of the first rod matches the cross-sectional shape of the mounting hole, and the first rod is connected to the mounting hole in an anti-rotation manner.

[0008] Furthermore, the tension indicator includes: a first stop groove, which is formed on the outer peripheral surface of the tension indicator rod and is located at the starting point of the tension scale line; and a second stop component, which is embedded in the first stop groove and can abut against the mounting base.

[0009] Furthermore, the tensioning device with a tension force display includes a connecting joint that is connected to the end of the tension force indicator rod away from the screw.

[0010] Furthermore, the tensioning device with a tension force display includes a third stop component and a fourth stop component. The third stop component and the fourth stop component are respectively disposed on opposite sides of the connecting joint along the axial direction of the tension force indicator rod. The third stop component is disposed on the side of the connecting joint closer to the screw, and the fourth stop component is disposed on the side of the connecting joint away from the screw. The third stop component and the fourth stop component abut against the connecting joint.

[0011] Furthermore, a second stop groove is provided on the outer circumferential surface of the tension indicator rod. The second stop groove is located on the side of the first stop groove away from the screw, and a third stop component is embedded in the first stop groove.

[0012] Furthermore, the fourth stop component includes a stop step, which is located at the end of the tension indicator rod away from the screw. A receiving groove is provided on the connecting joint, and the stop step is received in the receiving groove.

[0013] Furthermore, the tensioning device with a tension force display includes a thrust bearing, which is sleeved on the tension force indicator rod and installed in a receiving groove. The two ends of the thrust bearing abut against the stop step and the bottom surface of the receiving groove, respectively.

[0014] Furthermore, the device body is hollow, and at least part of the screw is housed inside the device body; at least part of the tension indicator rod is housed inside the device body.

[0015] Beneficial effects:

[0016] 1. This embodiment provides a tension display, including a mounting base and a tension indicator rod, at the end of the device body furthest from the screw. The tension indicator rod is designed to slide along the extension direction of the screw and has a tension scale line. The tension of the tensioned component is controlled according to the tension scale line. This allows for adjustment of the tension of the flexible guide rail based on the real-time tension during the adjustment of the guide rail's tightness, solving the technical problem in related technologies where the actual tension of the flexible guide rail cannot be accurately quantified during the adjustment of its tightness. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the tensioning device with a tension force display used in this embodiment of the present invention in the first tensioning state;

[0018] Figure 2 This is a schematic diagram of the tensioning device with a tension force display used in this embodiment of the present invention in the second tensioning state;

[0019] Figure 3 This is a schematic diagram of the internal structure of the tensioning device with a tension force display used in an embodiment of this utility model;

[0020] Figure 4 yes Figure 3 An enlarged view of point A in the image;

[0021] Figure 5 This is a perspective view of the tensioning device with a tension force display used in an embodiment of this utility model.

[0022] The above figures include the following reference numerals:

[0023] 1. Main body of the device; 2. Screw; 31. Mounting base; 311. Mounting hole; 312. Reference indicator surface; 32. Tension indicator rod; 321. First rod body; 322. First stop groove; 323. Second stop groove; 33. Tension scale line; 34. Elastic element; 35. First stop component; 36. Third stop component; 37. Fourth stop component; 38. Second stop component; 4. Connecting joint; 41. Receiving groove; 5. Thrust bearing. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0025] According to an embodiment of this utility model, a tensioning device with a tension force display is provided. Please refer to [link to relevant documentation]. Figures 1 to 5 The device includes: a main body 1, one end of which is connected to a screw 2; a tension display, which is located at the end of the main body 1 away from the screw 2. The tension display includes a mounting base 31 and a tension indicator rod 32 passing through the mounting base 31. The tension indicator rod 32 extends along the extension direction of the screw 2. Tension scale lines 33 are provided on the tension indicator rod 32. The tension indicator rod 32 is slidably connected to the mounting base 31.

[0026] Specifically, one end of the device body 1 is provided with a threaded feature and is threadedly connected to the screw 2, so that the screw 2 is rotatably connected to one end of the device body 1. By rotating the device body 1, the distance between the screw 2 and the device body 1 is adjusted, so that the screw 2 generates axial displacement, thereby applying tension to the flexible guide rail or other tensioned components.

[0027] Preferably, one end of the device body 1 is provided with an internal thread, which is connected to the external thread feature thread on the screw 2.

[0028] Specifically, a tension indicator is located at the end of the device body 1 furthest from the screw 2, and includes a mounting base 31 and a tension indicator rod 32 passing through the mounting base 31. The mounting base 31 is firmly connected to the device body 1, providing a sliding guide for the tension indicator rod 32. The tension indicator rod 32 is arranged along the same extension direction as the screw 2, so that the measurement direction is consistent with the actual force direction. The tension indicator rod 32 is provided with a tension scale line 33 and forms a sliding connection with its mounting base 31. When the flexible guide rail or other tensioned components are tightened, the reaction force is transmitted to the tension indicator rod 32 through the device body 1, causing it to undergo axial displacement relative to the mounting base 31. The amount of displacement is proportional to the applied tension force, so the current tension value can be directly read through the pre-calibrated tension scale line 33.

[0029] Specifically, an indicator reference is provided on the mounting base 31 to indicate the tension scale line corresponding to different tension forces. The extension direction of the indicator reference is consistent with the tension scale line. For example, the end face of the mounting base 31 away from the screw 2 can be used as the reference indicator surface 312, and the tension force of the tensioned part can be controlled according to the scale corresponding to the scale line of the reference indicator surface 312.

[0030] This embodiment provides a tension display, including a mounting base 31 and a tension indicator rod 32, at the end of the device body 1 away from the screw 2. The tension indicator rod 32 is designed to slide along the extension direction of the screw 2 and is equipped with a tension scale line 33. The tension of the tensioned component is controlled according to the tension scale line 33. Thus, the tension of the flexible guide rail can be adjusted according to the real-time tension during the adjustment of the tension of the flexible guide rail. This solves the technical problem in related technologies where the actual tension of the flexible guide rail cannot be accurately quantified during the adjustment of the tension of the flexible guide rail.

[0031] In the tensioning device with tension force display in this embodiment, see... Figure 1 The tension indicator includes an elastic element 34, which is sleeved on the tension indicator rod 32. One end of the elastic element 34 abuts against the end of the device body 1 away from the screw 2, and the other end of the elastic element 34 abuts against the first stop member 35 fixed on the tension indicator rod 32.

[0032] Specifically, an external thread section and a stepped surface are provided at the end of the tension indicator rod 32. The tensioning device also includes a stop nut, which is threadedly connected to the external thread section. At the same time, a first stop component 35 is installed between the stop nut and the stepped surface, thereby limiting the first stop component 35 and thus achieving the limiting effect on the elastic element 34.

[0033] In some embodiments, the first stop member 35 is a shaft retainer, specifically a U-shaped retainer with an installation opening, which facilitates the insertion of the first stop member 35 into the tension indicator rod 32 through the installation opening.

[0034] Specifically, when the main body 1 of the rotating device is rotated, the screw 2 is axially displaced. The screw 2 and the tension indicator rod 32 move inward or outward simultaneously, thereby tightening or loosening the tensioned components such as the flexible guide rail. The tension indicator rod 32 is connected to the tensioned component through the connecting joint 4. The tension force generated by the tensioned component acts in the opposite direction on the tension indicator rod 32, pushing the tension indicator rod 32 to compress the elastic element 34. The deformation of the elastic element 34 is proportional to the pressure it receives (i.e., the tension force of the flexible guide rail). The deformation of the elastic element 34 is transmitted to the main body through the tension indicator rod 32. The tension indicator rod 32 is used to convert the pressure of the main body 1 of the device into a linear thrust on the indicator rod, while preventing the tension indicator rod 32 from rotating with the mounting base 31 and causing the tension indicator rod 32 to extend outward. At the same time, when there is no tension or the tension is small, the elasticity of the elastic element 34 allows the tension indicator rod 32 to return to the zero-point reference.

[0035] In some embodiments, the tension scale line can be pre-calibrated according to the Hooke's constant of the spring (F=kx) to convert the displacement value into a force value (e.g., kilonewton, kN).

[0036] In the tensioning device with tension force display in this embodiment, see... Figure 3 The mounting base 31 has a mounting hole 311. The tension indicator rod 32 includes a first rod body 321 with tension scale lines 33. The cross-sectional shape of the first rod body 321 matches the cross-sectional shape of the mounting hole 311, and the first rod body 321 is anti-rotatingly connected to the mounting hole 311. Specifically, the anti-rotating connection between the first rod body 321 and the mounting hole 311 prevents the tension indicator rod 32 from rotating with the mounting base 31, ensuring that the tension indicator rod 32 can extend outward, thereby ensuring the measurement effect of the tension display.

[0037] In some embodiments, the mounting hole 311 is a square hole, such as a hexagonal hole, or an anti-rotation surface can be provided on the basis of a circular hole. In this application, the shape of the mounting hole 311 is not specifically limited, and the cross-sectional shape of the first rod 321 matches the cross-sectional shape of the mounting hole 311. For example, when the mounting hole 311 is a hexagonal hole, the cross-sectional shape of the first rod 321 is also hexagonal.

[0038] In the tensioning device with tension force display in this embodiment, see... Figure 1 and Figure 3 The tension indicator includes: a first stop groove 322, which is formed on the outer peripheral surface of the tension indicator rod 32 and is located at the starting point of the tension scale line 33; and a second stop component 38, which is embedded in the first stop groove 322 and can abut against the mounting base 31.

[0039] Specifically, the first stop groove 322 is set at the starting point of the tension force scale line 33. When the tensioning device is not under force, the second stop component 38 is embedded in the groove and abuts against the end face of the mounting base 31 to form a mechanical stop, thereby accurately defining the initial position of the tension force indicator rod 32. This ensures that the tension force indicator rod 32 can return to a uniform zero-point reference after each change in tension force, thus guaranteeing the accuracy and consistency of the reading.

[0040] In some embodiments, the second stop member 38 is a shaft retaining ring, specifically a U-shaped retaining ring with an installation opening, which facilitates the insertion of the second stop member 38 into the first stop groove 322 through the installation opening.

[0041] In the tensioning device with tension force display in this embodiment, see... Figure 1 The tensioning device with a tension indicator includes a connecting joint 4, which is connected to the end of the tension indicator rod 32 away from the screw 2. Thus, the tension indicator rod 32 is connected to a tensioning element such as a flexible guide rail via the connecting joint 4.

[0042] Understandably, screw 2 is also connected to a connecting head, which is used to connect to the flexible guide rail. For example, a U-shaped connecting head can be used.

[0043] In the tensioning device with tension force display in this embodiment, see... Figure 3 and Figure 4The tensioning device with a tension indicator includes a third stop component 36 and a fourth stop component 37. The third stop component 36 and the fourth stop component 37 are respectively disposed on opposite sides of the connecting joint 4 along the axial direction of the tension indicator rod 32. The third stop component 36 is disposed on the side of the connecting joint 4 closer to the screw 2, and the fourth stop component 37 is disposed on the side of the connecting joint 4 away from the screw 2. The third stop component 36 and the fourth stop component 37 respectively abut against the connecting joint 4. By disposing of the third stop component 36 and the fourth stop component 37 on both sides of the connecting joint 4 and forming a clamping abutment structure in the axial direction, the axial bidirectional limiting and fixing of the connecting joint 4 is achieved, preventing the connecting joint 4 from axially shifting along the tension indicator rod 32 when subjected to tension force or external vibration. Simultaneously, it facilitates the assembly process of the connecting joint 4 and the tension indicator rod 32 and restricts the relative position of the connecting joint 4 and the tension indicator rod 32.

[0044] In the tensioning device with tension force display in this embodiment, see... Figure 3 and Figure 4 A second stop groove 323 is provided on the outer peripheral surface of the tension indicator rod 32. The second stop groove 323 is located on the side of the first stop groove 322 away from the screw 2. A third stop component 36 is embedded in the first stop groove 322. By setting the third stop component 36, the axial fixation of the connecting joint 4 is achieved, and the maximum stroke of the tension indicator rod 32 is also limited.

[0045] In some embodiments, the third stop member 36 is a shaft retaining ring, specifically a U-shaped retaining ring with an installation opening, which facilitates the insertion of the third stop member 36 into the second stop groove 323 through the installation opening.

[0046] In the tensioning device with tension force display in this embodiment, see... Figure 3 and Figure 4 The fourth stop component 37 includes a stop step, which is located at the end of the tension indicator rod 32 away from the screw 2. The connecting joint 4 has a receiving groove 41, which accommodates the stop step. By setting the stop step, the axial fixation of the connecting joint 4 is achieved.

[0047] In the tensioning device with tension force display in this embodiment, see... Figure 3 and Figure 4The tensioning device with a tension indicator includes a thrust bearing 5, which is sleeved on the tension indicator rod 32 and installed in a receiving groove 41. Both ends of the thrust bearing 5 abut against the stop step and the bottom surface of the receiving groove 41, respectively. By placing the thrust bearing 5 in the receiving groove 41 and sleeved on the tension indicator rod 32, with both ends abutting against the stop step and the bottom surface of the receiving groove 41, a low-friction rotary connection between the connecting joint 4 and the tension indicator rod 32 is achieved. When the tensioning device is subjected to torsional torque or requires angle adjustment during actual installation or operation, the tension indicator rod 32 can rotate freely relative to the connecting joint 4, while the thrust bearing 5 bears the resulting axial load and rotational shear force, significantly reducing the frictional resistance between the two and ensuring smooth rotational operation and long-term reliability.

[0048] In the tensioning device with tension force display in this embodiment, see... Figure 1 The device body 1 is hollow, and at least part of the screw 2 is housed inside the device body 1; at least part of the tension indicator rod 32 is also housed inside the device body 1. In this way, the device body 1 is hollow, so that it can be used to accommodate the screw 2 and the tension indicator rod 32, and can realize that when the device body 1 is rotated, the screw 2 and the tension indicator rod 32 can move inward or outward simultaneously.

[0049] In some embodiments, the device body 1 is a turnbuckle.

[0050] This embodiment of the tensioning device with a tension force display is applied to fall protection guide rail systems such as construction hoists and fall arrest rails. This allows the tensioning device to simultaneously display tension force. Through the coordination of scale lines and indicator references, the device transforms the intangible tension force into a visually perceptible displacement reading, enabling visualized adjustment and eliminating the drawbacks of traditional experience-based operation. Its high-precision measurement ensures the consistency of tension force among multiple flexible guide rails and that each adjustment meets preset safety standards, significantly improving the reliability of the fall protection system. Structurally, the force measuring mechanism is integrated inside the device, without changing the original installation dimensions and connection method, facilitating upgrades and modifications to existing equipment. The introduction of the thrust bearing effectively reduces friction and wear, ensuring sensitivity and accuracy for long-term use. Furthermore, during routine inspections, the indicated position can directly indicate whether the wire rope has loosened due to creep or vibration, facilitating timely warnings and maintenance, truly achieving preventative maintenance.

[0051] In some embodiments, the tensioning device with a tension force display operates as follows:

[0052] In the initial unloaded state, the elastic element 34 is in a pre-compressed state. Under the elastic action of the elastic element 34, the tension indicator rod 32 causes the second stop component 38 to abut against the mounting base 31, and the first stop groove 322 cooperates with the second stop component 38 to limit the tension indicator rod 32 to the zero position. At this time, the starting point of the tension scale line 33 is aligned with the reference indicating surface 312 on the mounting base 31. The elastic element 34 can be a spring or other elastic element.

[0053] When it is necessary to tension the flexible guide rail, the rotating device body 1 will simultaneously drive the screw 2 and the tension indicator rod 32 to produce axial displacements in opposite directions. The screw 2 and the connecting joint 4 will pull the tensioned flexible guide rail from both ends, making it gradually taut.

[0054] As the flexible guide rail is tightened, the resulting tension is transmitted in the reverse direction to the tension indicator rod 32 through the connecting joint 4. The tension overcomes the elastic force of the elastic element 34 and pushes the tension indicator rod 32 to slide outward relative to the mounting base 31. The outward extension length of the tension indicator rod 32 changes. The operator can directly read the actual tension applied by observing the scale value corresponding to the tension scale line 33 and the reference indicator surface 312 on the mounting base 31.

[0055] Once the target tension is reached, the rotating device body 1 stops rotating, and the flexible guide rail remains stable. When it is necessary to release the tension, the rotating device body 1 rotates in the opposite direction, the tension of the flexible guide rail decreases, and the restoring force of the elastic element 34 pushes the tension indicator rod 32 to retract inward, causing the second stop component 38 to abut against the mounting base 31 again, and the tension indicator rod 32 returns to zero.

[0056] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0057] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated here.

[0058] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0059] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0060] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A tensioning device with a tension force display, characterized in that, include: The device body (1) has a screw (2) connected to one end of it. The tension display is located at one end of the device body (1) away from the screw (2). The tension display includes a mounting base (31) and a tension indicator rod (32) passing through the mounting base (31). The tension indicator rod (32) extends along the extension direction of the screw (2). The tension indicator rod (32) is provided with tension scale lines (33). The tension indicator rod (32) is slidably connected to the mounting base (31).

2. The tensioning device with a tension force display according to claim 1, characterized in that, The tension indicator includes an elastic element (34), which is sleeved on the tension indicator rod (32). One end of the elastic element (34) abuts against the end of the device body (1) away from the screw (2), and the other end of the elastic element (34) abuts against the first stop component (35) fixed on the tension indicator rod (32).

3. The tensioning device with a tension force display according to claim 1, characterized in that, The mounting base (31) has a mounting hole (311), and the tension indicator rod (32) includes a first rod (321) with the tension scale line (33) provided. The cross-sectional shape of the first rod (321) matches the cross-sectional shape of the mounting hole (311), and the first rod (321) is connected to the mounting hole (311) in an anti-rotation manner.

4. The tensioning device with a tension force display according to claim 1, characterized in that, The tension display includes: The first stop groove (322) is formed on the outer peripheral surface of the tension indicator rod (32) and is located at the starting point of the tension scale line (33). The second stop component (38) is embedded in the first stop groove (322) and can abut against the mounting base (31).

5. The tensioning device with a tension force display according to claim 4, characterized in that, The tensioning device with a tension indicator includes a connector (4) that is connected to the end of the tension indicator rod (32) away from the screw (2).

6. The tensioning device with a tension force display according to claim 5, characterized in that, The tensioning device with tension indicator includes a third stop (36) and a fourth stop (37). The third stop (36) and the fourth stop (37) are respectively disposed on opposite sides of the connecting joint (4) along the axial direction of the tension indicator rod (32). The third stop (36) is located on the side of the connecting joint (4) closer to the screw (2), and the fourth stop (37) is located on the side of the connecting joint (4) away from the screw (2). The third stop (36) and the fourth stop (37) abut against the connecting joint (4) respectively.

7. The tensioning device with a tension force display according to claim 6, characterized in that, The tension indicator rod (32) has a second stop groove (323) on its outer peripheral surface. The second stop groove (323) is located on the side of the first stop groove (322) away from the screw (2). The third stop component (36) is embedded in the first stop groove (322).

8. The tensioning device with a tension force display according to claim 6, characterized in that, The fourth stop component (37) includes a stop step, which is located at the end of the tension indicator rod (32) away from the screw (2). The connecting joint (4) has a receiving groove (41) which contains the stop step.

9. The tensioning device with a tension force display according to claim 8, characterized in that, The tensioning device with tension display includes a thrust bearing (5), which is sleeved on the tension indicator rod (32). The thrust bearing (5) is installed in the receiving groove (41), and the two ends of the thrust bearing (5) abut against the stop step and the bottom surface of the receiving groove (41), respectively.

10. The tensioning device with a tension force display according to claim 1, characterized in that, The device body (1) is hollow, and at least part of the screw (2) is housed inside the device body (1); and / or, at least part of the tension indicator rod (32) is housed inside the device body (1).

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