Rope tension measuring device

Abstract

The utility model relates to the technical field of force measuring devices, in particular to a rope tension measuring device. Comprising a seat body, a force measuring assembly and reversing rope winding pieces located on the left side and the right side of the force measuring assembly are installed on the seat body, the force measuring assembly comprises a pressure sensor fixedly installed on the seat body, a force transmission compression spring is arranged at the stress end of the pressure sensor, and the other end of the force transmission compression spring is connected with a force bearing rope winding piece for a rope to wind around. The force transmission pressure spring is located between the two reversing rope winding pieces and extends front and back; a pressure sensor and a force transmission compression spring are arranged in the space of one side where the force-bearing rope winding piece moves due to stress, during use, a loose rope is wound around the reversing rope winding piece on one side and passes through the force-bearing rope winding piece and the reversing rope winding piece on the other side, and the rope pulls the force-bearing rope winding piece to move so that the force transmission compression spring can be compressed; therefore, the pressure sensor obtains a rope tension value, the overall occupied space of the rope tension measuring device is reduced, and rapid deployment and storage are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of force measuring devices, in particular to a rope tension measuring device. Background Art

[0002] In various common rope device application fields, such as cranes, building curtain wall tension cables, bridge tower tension cables, etc., rope tension needs to be measured to ensure timely detection of dangerous rope stress conditions to ensure the safety of the equipment. In addition, for rope-driven manipulators, space rope-driven robots and other equipment, accurate and real-time measurement of rope tension is required to feed back to the controller so that the controller can correctly judge the equipment status and ensure that it correctly implements the dynamic control strategy.

[0003] In some cases, such as when the two ends of the rope are already fixedly connected or the installation space is limited, it is not convenient to install sensors at both ends of the rope to directly measure the rope tension, and it can only be indirectly measured in the middle of the rope by other methods. In the prior art, for example, the utility model patent with the authorization announcement number CN214471044U discloses a rope speed and force measuring device, which specifically discloses a mounting seat with an installation space, i.e., a seat body, a movable pulley is arranged in the installation space through a tension sensor vertically installed in the installation space, a disc and a fixed pulley, i.e., a reversing rope winding member on both sides, are respectively arranged at the lower part of the left and right sides of the movable pulley, and the upper end of the movable pulley is fixed at the lower end of the tension sensor. When measuring the rope tension, the rope is passed through the movable pulley, and the left section of the rope between the movable pulley and the disc, and the right section of the rope between the movable pulley and the fixed pulley are both perpendicular to the horizontal plane. The common tension of the left section and the right section of the rope can be calculated by the tension sensor, and the tension reading of the tension sensor is divided by two to obtain the tension on the rope.

[0004] Although the above-mentioned prior art can measure the tension in the middle of the rope without affecting the connection relationship between the two ends of the rope, when the rope tension changes, the rope pulls the movable pulley to move downward, and the tension sensor for measuring the rope tension needs to be set on the other side of the moving direction of the movable pulley, and the tension sensor is fixed to the mounting base by an upper fixing pin, and the overall space occupied is relatively large. Utility Model Content

[0005] The utility model aims to provide a rope tension measuring device to solve the problem that the force measuring device in the prior art occupies a large space.

[0006] To achieve the above-mentioned purpose, the technical solution of the rope tension measuring device provided by the utility model is: it includes a seat body, on which is installed a force measuring assembly and a reversing rope winding member located on the left and right sides of the force measuring assembly, the force measuring assembly includes a pressure sensor fixedly installed on the seat body, the force-bearing end of the pressure sensor is provided with a force transmission compression spring, the other end of the force transmission compression spring is connected to a force-bearing rope winding member for the rope to pass around, and the force transmission compression spring is located between the two reversing rope winding members and extends forward and backward.

[0007] As a further improvement, two groups of force measuring components are provided, and the two groups of force measuring components are arranged side by side on the left and right and symmetrically around the center.

[0008] As a further improvement, the two groups of force measuring components are arranged with both ends aligned.

[0009] As a further improvement, the seat body is a box body, the force measuring assembly and the reversing rope winding component are installed on the bottom plate of the box body, the left and right side plates of the box body are provided with rope threading notches for the rope to pass in and out, and the box body is also provided with a power supply module and an information processing module.

[0010] As a further improvement, the rope threading notches on the two side panels are arranged opposite to each other on the left and right sides.

[0011] As a further improvement, the box body is further provided with a cover body for sealing the inner space of the box body.

[0012] As a further improvement, the reversing rope winding member is located beside the force measuring assembly and close to the load-bearing rope winding member, and the box body has an installation space on the side of the reversing rope winding member away from the load-bearing rope winding member for installing the power supply module and the information processing module.

[0013] As a further improvement, the information processing module includes a collection control board arranged in the box body, and the information processing module is also configured with a wireless transmitter for transmitting data of the collection control board, and the wireless transmitter is connected to the outside of the box body.

[0014] As a further improvement, the reversing rope winding member is a fixed pulley corresponding to the rope threading notch, and the load-bearing rope winding member is a movable pulley connected to the force transmission compression spring.

[0015] As a further improvement, a guide rail is provided on the bottom plate of the box body, and the guide rail cooperates with the movable pulley along the extending direction of the force transmission compression spring.

[0016] The beneficial effect is: the utility model improves the existing rope speed and force measuring devices and provides a rope tension measuring device. When in use, the slack rope is wrapped around the reversing rope winding member on one side of the force measuring component, passing through the load-bearing rope winding member in the force measuring component and the reversing rope winding member on the other side. When the rope tension increases, the rope pulls the load-bearing rope winding member to move and apply force to the force transmission compression spring to compress the force transmission compression spring. At this time, the pressure sensor obtains the common tension of the rope wrapped around the left and right sides of the load-bearing rope winding member. The rope tension value can be obtained by dividing the data of the pressure sensor by two.

[0017] Compared with the prior art, the rope tension measuring device provided by the utility model is provided with a force transmission compression spring and a pressure sensor on the side where the load-bearing rope winding member moves due to the change of rope tension, so that the load-bearing rope winding member is driven to apply force to the pressure sensor during the change of rope tension, thereby obtaining rope tension data. The pressure sensor and the force transmission compression spring are arranged in the space on the side where the load-bearing rope winding member moves due to force, and the two reversing rope winding members are also arranged in the extension direction of the force transmission compression spring, sharing the front and rear direction space, so that the space occupied by the overall device is reduced, which is conducive to rapid deployment and storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional structural diagram of an embodiment of a rope tension measuring device provided by the utility model;

[0019] Figure 2 A three-dimensional structural diagram of an embodiment of a force measuring component in a rope tension measuring device provided by the utility model;

[0020] Figure 3 for Figure 2 Schematic diagram of the working state of the force measuring component when the rope tension is small;

[0021] Figure 4 for Figure 2 Schematic diagram of the working state of the force measuring component when the rope tension is large;

[0022] In the figure: 1. movable pulley; 2. fixed pulley; 3. rope; 4. acquisition control board; 5. wireless transmitter; 6. screen; 7. button; 8. pressure sensor; 9. battery; 10. guide rail; 11. force transmission compression spring; 12. box body; 13. cover body; 14. bottom plate. DETAILED DESCRIPTION

[0023] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0024] In various common rope device application fields, rope tension should be measured based on the need for safe operation to ensure timely detection of dangerous rope stress conditions to ensure the safety of the equipment. In addition, in most cases, since both ends of the rope are fixed, it is not convenient to install sensors at both ends of the rope to directly measure the rope tension, and the rope tension can only be measured in the middle of the rope without changing the rope connection relationship. However, although the prior art cited in the background technology can measure the rope tension, its tension sensor is arranged in the direction opposite to the rope being pulled to cause the movable pulley to move, and the overall space occupied is relatively large. Based on this, the utility model provides a rope tension measuring device that improves the prior art to solve the problems existing in the above-mentioned prior art.

[0025] The overall design concept of the rope tension measuring device provided by the utility model is:

[0026] A rope tension measuring device comprises a seat body, on which a force measuring assembly is mounted, and reversing rope winding parts are arranged on the left and right sides of the force measuring assembly. The force measuring assembly comprises a pressure sensor fixedly mounted on the seat body, a force transmission compression spring is arranged at the force-bearing end of the pressure sensor, and the other end of the force transmission compression spring is connected to a load-bearing rope winding part for the rope to pass around, and the force transmission compression spring is located between the two reversing rope winding parts and extends forward and backward.

[0027] The rope tension measuring device provided by the utility model is provided with a force transmission compression spring and a pressure sensor on the side where the load-bearing rope winding member moves due to the change of rope tension, so that the load-bearing rope winding member is driven to apply force to the pressure sensor during the change of rope tension, thereby obtaining rope tension data. The pressure sensor and the force transmission compression spring are arranged in the space on the side where the load-bearing rope winding member moves due to force, and the side space of the force transmission compression spring in the force measuring component is used to arrange the reversing rope winding member, which occupies less space in the front-to-back direction, so that the overall space of the device is less, which is conducive to rapid deployment and storage.

[0028] Based on the above overall introduction to the rope tension measuring device of the utility model, a more specific embodiment is provided below on the basis of the overall introduction:

[0029] To ensure the continuity and accuracy of the rope tension test, two groups of force measuring components are provided. The two groups of force measuring components are arranged side by side and symmetrically with the center. When measuring the tension of the rope, the slack rope is passed through the reversing rope winding parts of one group of force measuring components, and passes through the two load-bearing rope winding parts in turn. The rope passing through the load-bearing rope winding parts of the two groups of force measuring components presents an S shape, and then moves away from the force measuring components through the reversing rope winding parts on the other side. When the rope has a certain tension, the load-bearing rope winding parts of the two groups of force measuring components are moved in opposite directions, and the pressure sensor detects the data of the ropes on both sides of the load-bearing rope winding parts at the same time, that is, the pressure sensor detects the common tension data of the ropes on both sides of the load-bearing rope winding parts. The operator divides the pressure sensor data by two to obtain the tension data of the rope.

[0030] During the rope tension test, if the values ​​of the pressure sensors of the two force measuring components are not much different, it means that the two force measuring components are working normally. Then the average of the two rope tension values ​​is taken, which effectively reduces the error existing in a single measurement point, can more accurately reflect the actual tension of the rope, and improve the accuracy and reliability of force measurement. At the same time, even if one of the force measuring components fails, the other force measuring component can still measure the rope tension to ensure the continuity and accuracy of the rope tension test. The operator only needs to check the values ​​of the pressure sensors of the two force measuring components and compare them. If the values ​​of the two pressure sensors are not much different, it means that the two force measuring components are working normally, which is conducive to the operator to quickly discover the failure of a certain force measuring component, so as to facilitate timely replacement and avoid the operator's misjudgment of the rope usage status due to incorrect rope tension values.

[0031] In addition, the force transmission spring arranged between the load-bearing rope winding member and the pressure sensor can compress the force transmission spring when the load-bearing rope winding member moves due to changes in rope tension, thereby preventing sudden changes in rope tension from impacting or even damaging the pressure sensor. Regardless of whether the rope tension increases or decreases, the force transmission spring can ensure that the rope tension can always be transmitted to the pressure sensor, ensuring that the measurement data is uninterrupted and real-time.

[0032] More preferably, in this embodiment, the two sets of force measuring components arranged symmetrically at both ends are arranged in alignment, so that on the basis of reducing the space occupied on the left and right sides by the symmetrical arrangement, the space occupied by the front and rear of the device can be reduced, thereby reducing the overall space occupied by the device. Of course, the two sets of force measuring components can also be arranged symmetrically at the same time and staggered in the front and rear directions, so that the rope can be easily wound around the two sets of force measuring components.

[0033] Based on the above overall introduction to the rope tension measuring device of the utility model, a more specific embodiment is provided below on the basis of the overall introduction:

[0034] like Figure 1-4As shown, the seat body is a box body 12, and the box body 12 includes a bottom plate 14 and four side plates on the bottom plate 14. The force measuring assembly and the reversing rope winding member are installed on the bottom plate 14, and the four side plates surround the force measuring assembly and the reversing rope winding member. A fixed pulley 2 is provided on the side of the force transmission compression spring 11 in the force measuring assembly as a reversing rope winding member, and a movable pulley 1 is provided as a load-bearing rope winding member in the force measuring assembly, so as to allow the rope 3 to be wound around the force measuring assembly through the reversing rope winding member to measure the tension of the rope 3. In other embodiments, the load-bearing rope winding member can also be an arc-shaped plate fixed to one end of the force transmission compression spring, the arc-shaped plate is for the rope to be wound around, and the force transmission compression spring is compressed when the rope tension changes. Of course, a smooth slide plate can also be provided in the box body 12 as a reversing rope winding member, and the rope can slide along the surface of the slide plate to the load-bearing rope winding member.

[0035] In this embodiment, a fixed pulley 2 is provided to change the direction of the rope 3, so that after the rope 3 passes through the force measuring component, it is guided to the outside of the box body 12 from the fixed pulley 2 on the other side. The fixed pulley 2 can change the direction of the rope 3 without changing the tension of the rope 3, and guide the rope 3 to the movable pulley 1, which can ensure that the direction of the rope 3 on the force measuring component corresponds to the pressure sensor 8, reducing the measurement error caused by the direction deviation. The use of the fixed pulley 2 and the movable pulley 1 makes it easy to ensure the smoothness of the movement of the rope 3 when the tension of the rope 3 changes, reduces the friction of the rope 3, and increases the stability of the rope tension measuring device.

[0036] The left and right side panels of the box body 12 are provided with rope threading notches for the rope to pass through. The rope threading notches are arranged opposite to each other on the left and right sides. The ropes on both sides of the force measuring assembly are kept in a colinear state through the reversing rope winding member, which can prevent the box body from twisting and affecting the rope tension measurement when the rope tension changes. More specifically, the rope threading notch is arranged at the position corresponding to the reversing rope winding member, so that the rope can be quickly indexed to the force measuring assembly through the rope threading notch through the reversing rope winding member. In this embodiment, the rope threading notch is a U-shaped groove opened on the side panel of the box body 12. When in use, the box body 12 is close to the rope 3 in normal use, so that a section of the rope 3 extends into the box body 12 from the U-shaped grooves on both sides. The operator manually adjusts the rope 3 so that the rope 3 is wound around the load-bearing rope winding member of the force measuring assembly, so as to facilitate the subsequent rope 3 tension measurement. Of course, the rope threading notch can also be a V-shaped groove. The design of the V-shaped groove can more effectively guide the rope into the box body and reduce the sliding and wear of the rope at the notch; or the rope threading notch can also be an arc groove.

[0037] In order to facilitate the protection of the rope tension measuring device, the box body 12 is also provided with an adaptive cover body 13. The cover body 13 seals the force measuring component and the reversing rope winding part in the box body 12. The setting of the cover body 13 can effectively avoid the influence of the external environment on the force measuring component, and can extend the service life of the force measuring component and maintain the accuracy of the measurement. In addition, during the rope tension measurement process, a certain elastic force or tension may be generated. The cover body 13 can prevent the operator from directly contacting the working force measuring component, and can avoid misoperation, which is convenient for summary and carrying. Corresponding jacks or pins are set on the box body 12, and the cover body 13 can be connected to the box body 12 through a pin or a buckle. A hinge can also be installed on one side of the box body 12, and the cover body 13 is connected to the box body 12 through a hinge, which is convenient for opening and closing, and is more suitable for situations where frequent tension measurement is required.

[0038] Based on the above overall introduction to the rope tension measuring device of the utility model, a more specific embodiment is provided below on the basis of the overall introduction:

[0039] This embodiment focuses on a detailed description of how to process and transmit the tension data of the pressure sensor.

[0040] like Figure 1-2 As shown, in actual use, in order to facilitate statistical management of rope tension data, and because in most cases the rope tension measuring device is used in an outdoor environment and is not convenient to connect to a power source, there is an installation space in the box body 12 on the side of the reversing rope winding member away from the load-bearing rope winding member for the installation of the power supply module and the information processing module. The information processing module and the power supply module are arranged at the two corners of the box body 12, which effectively utilizes the free space inside the box body 12, making the entire rope tension measuring device more compact, reducing the total volume, and facilitating storage and carrying. In addition, being arranged at the corner is beneficial to the heat dissipation of the information processing module and the power supply module to a certain extent, which helps to extend the service life and maintain stable performance.

[0041] The information processing module includes a collection control board 4 for processing the data of the pressure sensor 8. The information processing module is also configured with a wireless transmitter 5 connected to the outside of the box body 12, and a screen 6 and a button 7 arranged on the box body 12. The pressure sensor 8 can obtain real-time tension data when the tension of the rope 3 changes. The tension data is received by the collection control board 4 for processing and analysis, and the tension value of the rope 3 is obtained by calculation. The tension value of the rope 3 can be transmitted to the screen 6 on the box body 12 through the collection control board 4 for display, so that the operator can view it in real time. At the same time, these tension data can also be sent to the wireless transmitter 5 outside the box body 12 through the collection control board 4 for wireless transmission, so as to facilitate remote monitoring or data analysis, and are not restricted by physical connections. The setting of the rope 3 tension measuring device is more flexible. The operator can operate the rope 3 tension measuring device through the button 7 on the box body 12, such as calling up a function menu, selecting different display modes, etc. The button 7 signal is received by the collection control board 4, and the screen 6 display is updated or the corresponding function is executed according to the operation instruction. Of course, in other embodiments, the acquisition control board 4 may be equipped with an onboard transmission interface, specifically a wired interface for wired transmission, which makes data transmission more stable, less susceptible to external interference, and can provide a higher data transmission rate.

[0042] The power supply module includes a battery 9 arranged at the corner of the box body 12 and a charging interface provided on the box body 12. The battery 9 in the box body 12 provides power for the tension measuring device of the rope 3. When the battery 9 is low on power, the battery 9 can be charged through the charging interface on the box body 12. The acquisition control board 4 in the information processing module can monitor the power of the battery 9 and prompt the operator to charge through the screen 6 when the power is low.

[0043] Based on the above overall introduction to the rope tension measuring device of the utility model, a more specific embodiment is provided below on the basis of the overall introduction:

[0044] A guide rail 10 is provided on the bottom plate of the box body 12, and the guide rail 10 cooperates with the movable pulley 1 for guiding. More specifically, as Figure 2 As shown, the guide rail 10 is a T-shaped guide rail, and an adaptive slider is fixed at the bottom of the movable pulley 1. Therefore, when the movable pulley 1 of the force measuring assembly moves due to the tension of the rope 3, the guide rail 10 can ensure that the movable pulley 1 moves along a predetermined straight path, avoiding deviation or distortion. Under the pulling of the rope, the movable pulley 1 only moves along the extension direction of the force transmission compression spring 11. This accurate motion trajectory can ensure that the pressure sensor receives accurate and consistent data.

[0045] In other embodiments, a guide rod may be provided to cooperate with the guide of the movable pulley, the guide rod is provided inside the force transmission compression spring and fixed between the box body and the pressure sensor, the wheel axle of the movable pulley has a guide hole for the guide rod to pass through, and the guide hole and the guide rod are in profile matching, for example, the guide hole is a square hole, the guide rod is a square shaft, or the guide hole with a hexagonal hole and the guide shaft with a hexagonal shaft are provided, so as to ensure that the movable pulley and the guide rod will not move relative to each other, so that when the rope tension changes, the movable pulley can be driven to move along the guide rod and the force transmission compression spring can be compressed to transmit pressure to the pressure sensor. Of course, a slide groove may also be provided on the box body, and the movable pulley and the slide groove are guided and matched by a slider mechanism.

[0046] It should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0047] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rope tension measuring device, comprising a seat, a force measuring assembly and a reversing rope winding member on the left and right sides of the force measuring assembly are installed on the seat, wherein: The force measuring assembly includes a pressure sensor fixedly mounted on a seat body, a force transmission compression spring is arranged at the force-bearing end of the pressure sensor, the other end of the force transmission compression spring is connected to a load-bearing rope winding member for the rope to pass around, and the force transmission compression spring is located between the two reversing rope winding members and extends forward and backward.

2. The rope tension measuring device according to claim 1, characterized in that: There are two groups of force measuring components, which are arranged side by side on the left and right and symmetrically around the center.

3. The rope tension measuring device according to claim 2, characterized in that: The two sets of force measuring components are arranged to be aligned at both ends.

4. The rope tension measuring device according to any one of claims 1 to 3, characterized in that: The seat body is a box body, and the force measuring assembly and the reversing rope winding component are installed on the bottom plate of the box body. The left and right side plates of the box body are provided with rope threading notches for the rope to pass in and out. The box body is also provided with a power supply module and an information processing module.

5. The rope tension measuring device according to claim 4, characterized in that: The rope threading notches on the two side panels are arranged opposite to each other.

6. The rope tension measuring device according to claim 4, characterized in that: The box body is also provided with a cover body for sealing the inner space of the box body.

7. The rope tension measuring device according to claim 4, characterized in that: The reversing rope winding member is located beside the force measuring component and is arranged close to the load-bearing rope winding member. The box body has an installation space on the side of the reversing rope winding member away from the load-bearing rope winding member for installing the power supply module and the information processing module.

8. The rope tension measuring device according to claim 7, characterized in that: The information processing module includes a collection control board arranged in the box body. The information processing module is also configured with a wireless transmitter for transmitting data of the collection control board. The wireless transmitter is connected to the outside of the box body.

9. The rope tension measuring device according to any one of claims 5 to 8, characterized in that: The reversing rope winding component is a fixed pulley correspondingly arranged at the rope threading notch, and the load-bearing rope winding component is a movable pulley connected to the force transmission compression spring.

10. The rope tension measuring device according to claim 9, characterized in that: A guide rail is arranged on the bottom plate of the box body, and the guide rail cooperates with the movable pulley along the extending direction of the force transmission compression spring.

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