Three-pulley force transducer

Abstract

The utility model relates to the field of three-pulley sensors, in particular to a three-pulley force transducer, which comprises a mounting rack, a force measuring device and an adjusting guide device, the mounting rack is provided with a first mounting hole and two second mounting holes, and the two second mounting holes are symmetrically arranged on two sides of the first mounting hole; the force measuring device is inserted into the first mounting hole and is used for measuring the tension of the steel wire rope; the number of the adjusting guide devices is two, the adjusting guide devices are inserted into the second mounting holes respectively, the positions of the adjusting guide devices can be adjusted in the second mounting holes, and the tension of the steel wire rope is adjusted. The second mounting holes symmetrically formed in the mounting frame are used for mounting the adjusting guide device, so that tension adjustment can be performed according to the steel wire ropes with various diameters, the sensor can keep stable measurement performance under different working conditions, the problem that a traditional three-pulley sensor is insufficient in adaptability when facing the steel wire ropes with different diameters is solved, and the sensor has high practicability. And the universality of the sensor is improved.

Description

Technical Field

[0001] This utility model relates to the field of three pulley sensor technology, specifically a three pulley force sensor. Background Technology

[0002] As a type of force sensor, the three-pulley sensor has gained widespread recognition and application in the field of crane load monitoring due to its high adaptability. The traditional three-pulley sensor structure mainly consists of two guide pulleys and one load-bearing pulley. The core function of the guide pulleys is to guide the direction of the wire rope, ensuring it moves along a predetermined path; while the load-bearing pulley directly bears and transmits the tension from the wire rope, and is a key component for force measurement.

[0003] The existing utility model patent CN208998984U proposes a three-pulley sensor. This utility model sets up a connecting mechanism and a locking device. The connecting mechanism is used to connect the force-bearing pulley, and the locking device is used to lock the connecting mechanism. The two work together to allow the force-bearing pulley to be detachably connected to the mounting plate.

[0004] As described in the above technical solution, the locking device, in conjunction with the connecting mechanism, enables the force-bearing pulley to be detachable. However, this device has the problem of not being able to adjust according to the diameter of the wire rope. Since lifting equipment uses a wide variety of wire rope diameters, the sensor often lacks adaptability when dealing with wire ropes of different diameters. When the wire rope diameter changes, the sensor cannot measure accurately or may even malfunction, which greatly limits the sensor's application range and flexibility. Utility Model Content

[0005] To address the technical problems in the prior art, this utility model provides a three-pulley force sensor, which aims to solve the problem that existing three-pulley sensors cannot flexibly adapt to the measurement of steel wire ropes of different diameters.

[0006] A three-pulley force sensor includes a mounting bracket, a force measuring device, and an adjusting guide device, wherein...

[0007] The mounting bracket has a first mounting hole and a second mounting hole, and the second mounting hole includes two holes, which are symmetrically arranged on both sides of the first mounting hole;

[0008] The force measuring device is inserted into the first mounting hole to measure the tension of the wire rope.

[0009] The adjusting guide device includes two devices, which are respectively inserted into the second mounting hole. The position of the adjusting guide device can be adjusted within the second mounting hole to adjust the tension of the wire rope.

[0010] Preferably, the adjusting guide device includes a guide pulley, an eccentric adjusting plate, and a pulley shaft, wherein,

[0011] The pulley shaft is inserted on the guide pulley, and the guide pulley is inserted into the second mounting hole through the pulley shaft. The diameter of the pulley shaft is smaller than the inner diameter of the second mounting hole.

[0012] The eccentric adjustment plate includes two plates, which are symmetrically arranged at both ends of the pulley shaft, and the two ends of the pulley shaft are rotatably inserted into the corresponding eccentric adjustment plate.

[0013] Preferably, the eccentric adjustment plate is provided with an eccentric hole and an adjustment hole, wherein,

[0014] The eccentric hole is provided correspondingly to the pulley shaft, and the pulley shaft is rotatably inserted into the eccentric hole;

[0015] The adjustment hole is located around the eccentric hole.

[0016] Preferably, the adjustment hole is arranged around the center of the eccentric adjustment plate, and the mounting bracket is provided with a positioning hole corresponding to the adjustment hole. The eccentric adjustment plate can be fixed on the mounting bracket by connecting the adjustment hole and the positioning hole with bolts.

[0017] Preferably, the adjusting hole is arc-shaped, and the bolt can slide along the adjusting hole within the adjusting hole.

[0018] Preferably, the two second mounting holes are located on top of the first mounting hole.

[0019] Preferably, the force measuring device includes a force measuring pulley and a force measuring sensor, wherein,

[0020] The force sensor is rotatably inserted into the first mounting hole;

[0021] The force-measuring pulley is rotatably mounted on the force sensor.

[0022] Preferably, the mounting bracket includes a mounting plate and a support shaft, wherein,

[0023] The mounting plate includes two symmetrically arranged plates, the force measuring device and the adjusting guide device are located between the two mounting plates, and the first mounting hole and the second mounting hole are provided on the mounting plate;

[0024] The support shaft is located between two mounting plates, and the two mounting plates can be connected by bolts.

[0025] Preferably, the support shafts include multiple shafts, which are symmetrically arranged on the left and right sides of the force measuring device.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The three-pulley force sensor provided by this utility model has the following advantages over the prior art:

[0028] By setting up a mounting frame, a force measuring device, and an adjustment guide device, the second mounting hole symmetrically arranged on the mounting frame is used to install the adjustment guide device, which can adjust the tension according to steel wire ropes of various diameters. This ensures that the sensor can maintain stable measurement performance under different working conditions, solves the problem of insufficient adaptability of traditional three-pulley sensors when facing steel wire ropes of different diameters, and improves the versatility of the sensor.

[0029] By combining a guide pulley and an eccentric adjusting plate, the guide pulley is inserted into the mounting hole via a pulley shaft. The diameter of the pulley shaft is smaller than the inner diameter of the mounting hole, allowing the guide pulley to be flexibly adjusted within the mounting hole to accommodate wire ropes of different diameters.

[0030] The eccentric adjustment plate is fixed to the mounting frame by bolting the adjustment hole and the positioning hole. The adjustment hole is arc-shaped, and the bolt can slide along the adjustment hole, making the adjustment of the eccentric adjustment plate smoother and more seamless. This better adapts to the measurement needs of steel wire ropes of different diameters, improving the accuracy and reliability of the measurement. Moreover, the bolt connection facilitates installation and disassembly, improving the convenience of sensor maintenance.

[0031] The mounting frame includes symmetrically arranged mounting plates and support shafts. The force measuring device and adjustment guide device are located between the two mounting plates. Multiple support shafts are symmetrically arranged on the left and right sides of the force measuring device, which enhances the stability of the mounting frame and provides reliable support for the force measuring device and adjustment guide device. This ensures that the sensor can maintain stable measurement performance under different working conditions, thereby improving the reliability and service life of the sensor. Attached Figure Description

[0032] Figure 1 This is a front view of the overall three-pulley force sensor of this utility model (thick steel wire).

[0033] Figure 2 This is a front view of the overall three-pulley force sensor of this utility model (thin steel wire).

[0034] Figure 3 This is an exploded view of the mounting bracket for a three-pulley force sensor according to this utility model;

[0035] Figure 4 This is an exploded view of the eccentric adjustment plate and mounting bracket of a three-pulley force sensor according to this utility model;

[0036] Figure 5 This is a schematic diagram of the overall back of a three-pulley force sensor according to the present invention.

[0037] In the diagram: 1. Mounting bracket; 11. Mounting plate; 12. Support shaft; 101. First mounting hole; 102. Second mounting hole; 103. Positioning hole; 2. Force measuring device; 21. Force measuring pulley; 22. Force sensor; 3. Adjusting guide device; 31. Guide pulley; 32. Eccentric adjustment plate; 33. Pulley shaft; 34. Eccentric hole; 35. Adjustment hole. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] Please see Figure 1-5 The present application proposes a three-pulley force sensor, which includes a mounting frame 1, a force measuring device 2, and an adjustment guide device 3.

[0040] like Figure 1 , Figure 3-5 As shown, the mounting bracket 1 has a first mounting hole 101 and a second mounting hole 102. The second mounting hole 102 includes two holes, which are symmetrically arranged on both sides of the first mounting hole 101. The force measuring device 2 is inserted into the first mounting hole 101 for measuring the tension of the wire rope. The adjusting guide device 3 includes two holes, which are respectively inserted into the second mounting hole 102. The adjusting guide device 3 can be adjusted in position within the second mounting hole 102 for adjusting the tension of the wire rope.

[0041] Specifically, the second mounting holes 102 symmetrically arranged on the mounting bracket 1 are used to install the adjustment guide device 3, which can adjust the tension according to the steel wire ropes of various diameters, ensuring that the sensor can maintain stable measurement performance under different working conditions. This solves the problem of insufficient adaptability of traditional three-pulley sensors when facing steel wire ropes of different diameters and improves the versatility of the sensor.

[0042] The adjusting guide device 3 can be adjusted in position within the second mounting hole 102, thereby changing its spatial position in the second mounting hole 102 to accommodate wire ropes of different diameters.

[0043] like Figure 3-4In some optional embodiments, the adjusting guide device 3 includes a guide pulley 31, an eccentric adjusting plate 32, and a pulley shaft 33. The pulley shaft 33 is inserted on the guide pulley 31, and the guide pulley 31 is inserted into the second mounting hole 102 through the pulley shaft 33. The diameter of the pulley shaft 33 is smaller than the inner diameter of the second mounting hole 102. The eccentric adjusting plate 32 includes two plates, which are symmetrically arranged at both ends of the pulley shaft 33. The two ends of the pulley shaft 33 are rotatably inserted into the corresponding eccentric adjusting plate 32.

[0044] Specifically, the guide pulley 31 is installed in the second mounting hole 102 via a pulley shaft 33. The diameter of the pulley shaft 33 is smaller than the inner diameter of the second mounting hole 102, thus allowing the guide pulley 31 to be adjusted in position within the mounting hole. An eccentric adjustment plate 32 is located at both ends of the pulley shaft 33, with each end of the pulley shaft 33 rotatably inserted into the eccentric adjustment plate 32. This allows the position of the guide pulley 31 to be flexibly adjusted via the eccentric adjustment plate 32, thereby adapting to wire ropes of different diameters. The symmetrical arrangement of the eccentric adjustment plate 32 ensures the balance and stability of the adjustment process.

[0045] The end of the pulley shaft 33 can be threaded and a nut can be used to limit its position to ensure its stability during use. At the same time, a cotter pin can be set at the tail of the pulley shaft 33 to prevent the nut from falling off, which not only improves stability but also facilitates its quick disassembly.

[0046] like Figure 3-4 In some optional embodiments, the eccentric adjustment plate 32 is provided with an eccentric hole 34 and an adjustment hole 35. The eccentric hole 34 is correspondingly provided with the pulley shaft 33, and the pulley shaft 33 is rotatably inserted into the eccentric hole 34. The adjustment hole 35 is provided on the periphery of the eccentric hole 34.

[0047] Specifically, the eccentric hole 34 is used to install the pulley shaft 33, which can rotate within the eccentric hole 34; the adjustment hole 35 is located on the periphery of the eccentric hole 34 and is used to fix the position of the eccentric adjustment plate 32; through the adjustment hole 35, the eccentric adjustment plate 32 can be adjusted at multiple angles on the mounting bracket 1; this allows the position of the guide pulley 31 to be precisely adjusted through the eccentric adjustment plate 32, further improving the sensor's adaptability to wire ropes of different diameters; the design of the adjustment hole 35 provides multiple fixed positions for the eccentric adjustment plate 32, increasing the flexibility of adjustment.

[0048] like Figure 4 As shown, in some optional embodiments, the adjustment hole 35 is arranged around the center of the eccentric adjustment plate 32, and the mounting bracket 1 is provided with a positioning hole 103 corresponding to the adjustment hole 35. The eccentric adjustment plate 32 can be fixed on the mounting bracket 1 by connecting the adjustment hole 35 and the positioning hole 103 with bolts.

[0049] Specifically, the eccentric adjustment plate 32 can be fixed on the mounting bracket 1 by bolting the adjustment hole 35 and the positioning hole 103; the position of the eccentric adjustment plate 32 can be finely adjusted by sliding the bolt in the adjustment hole 35, thereby achieving precise adjustment of the position of the guide pulley 31; the adjustment hole 35, which is set around the center of the eccentric adjustment plate 32, provides a fixed position for the eccentric adjustment plate 32, further enhancing the flexibility and accuracy of adjustment.

[0050] like Figure 4 As shown, in some alternative embodiments, the adjustment hole 35 is arc-shaped, and the bolt can slide along the adjustment hole 35 within the adjustment hole 35.

[0051] Specifically, the bolt can slide along an arc within the adjusting hole 35, allowing the position of the eccentric adjusting plate 32 to be finely adjusted by sliding the bolt within the arc-shaped adjusting hole 35, thereby achieving precise adjustment of the position of the guide pulley 31.

[0052] like Figure 3-4 As shown, in some optional embodiments, the arc-shaped adjustment holes 35 include two symmetrically arranged holes, providing a continuous adjustment range for the eccentric adjustment plate 32, enabling the sensor to more accurately adapt to wire ropes of different diameters; this not only improves the adaptability of the sensor, but also enhances the flexibility and stability of the adjustment process.

[0053] Figure 3-4 As shown, in some optional embodiments, the second mounting hole 102 is located at the top of the first mounting hole 101, so that the adjusting guide device 3 inserted in the second mounting hole 102 and the force measuring device 2 form a positional difference, which facilitates the steel wire to pass through between the adjusting guide device 3 and the force measuring device 2, and facilitates the installation of the steel wire.

[0054] like Figure 3 As shown, in some optional embodiments, the force measuring device 2 includes a force measuring pulley 21 and a force measuring sensor 22, wherein the force measuring sensor 22 is rotatably inserted into the first mounting hole 101; and the force measuring pulley 21 is rotatably sleeved on the force measuring sensor 22.

[0055] Specifically, the force sensor 22 is rotatably inserted into the first mounting hole 101 of the mounting bracket 1, and the force measuring pulley 21 is rotatably sleeved on the force sensor 22; so that the force measuring device 2 can rotate flexibly and ensure that the wire rope is subjected to uniform force on the force measuring pulley 21; the force sensor 22 is used to measure the tension generated when the wire rope passes through the force measuring pulley 21 and converts the tension signal into an electrical signal output.

[0056] like Figure 3 , Figure 5As shown, in some optional embodiments, the mounting bracket 1 includes a mounting plate 11 and a support shaft 12. The mounting plate 11 includes two symmetrically arranged plates. The force measuring device 2 and the adjusting guide device 3 are located between the two mounting plates 11. The mounting plate 11 is provided with a first mounting hole 101 and a second mounting hole 102. The support shaft 12 is located between the two mounting plates 11. The support shaft 12 can connect the two mounting plates 11 by bolts.

[0057] Specifically, the mounting frame 1 includes two mounting plates 11 and a support shaft 12. The support shaft 12 is located between the two mounting plates 11, and the two mounting plates 11 are connected by bolts to form a stable overall structure. This enhances the stability of the mounting frame 1, provides reliable support for the force measuring device 2 and the adjustment guide device 3, and ensures the reliability of the sensor during operation.

[0058] like Figure 3 As shown, in some optional embodiments, the support shaft 12 includes multiple shafts, which are symmetrically arranged on the left and right sides of the force measuring device 2 to provide uniform support force.

[0059] Specifically, the support shafts 12 include four, symmetrically arranged in pairs on the left and right sides of the force measuring device 2; this further enhances the stability of the mounting frame 1, ensuring that the sensor can maintain stable measurement performance under different working conditions; the symmetrical arrangement of the four support shafts 12 provides uniform support force to the force measuring device 2 and the adjusting guide device 3, improving the reliability and service life of the sensor.

[0060] Meanwhile, a cotter pin can be used to limit the bolt at the end to prevent it from falling off, and the cotter pin also facilitates quick disassembly.

[0061] In practical use, the wire rope passes through the adjustment guide device 3 on one side, passes through the force measuring pulley 21 of the force measuring device 2, and then passes out from the adjustment guide device 3 on the other side. By rotating the eccentric adjustment plate 32, the position of the eccentric hole 34 can be changed, thereby driving the guide pulley 31 to change its spatial position in the up, down, left and right directions, so as to adapt to both thick and thin wire ropes.

[0062] When the eccentric hole 34 is at its highest position, the guide pulley 31 moves upward, increasing the longitudinal distance between it and the force-measuring pulley 21, thus accommodating a thicker wire rope. Figure 1 As shown; when the eccentric hole 34 is at its lowest point, the guide pulley 31 moves upward, reducing the longitudinal distance between it and the force-measuring pulley 21, thus adapting it to a thinner wire rope, such as... Figure 2 As shown; when the diameter of the wire rope becomes thinner, if the distance between the eccentric guide pulley 31 and the force measuring pulley 21 is not adjusted, the thin wire may not be able to bear the force, and the middle force measuring pulley 21 may not be able to measure the wire tension. Therefore, the eccentric hole 34 of the guide pulley 31 needs to be moved downward until the middle force measuring pulley 21 bears the force.

[0063] It should be noted that when the thin steel wire is replaced with a thick steel wire rope, although the intermediate force-measuring pulley 21 can always bear force, the range of the force sensors 22 configured on the intermediate force-measuring pulley 21 is relatively small. Therefore, the tension of the steel wire rope can easily exceed the safe range of the force sensors 22, thus damaging the force sensors 22. At this time, it is necessary to adjust the guide pulley 31 to move the eccentric mounting hole upward to reduce the tension of the steel wire rope, thereby reducing the pressure on the force sensors 22. Since the guide pulley 31 can be adjusted in multiple directions within the second mounting hole 14, it can not only reduce the tension of the steel wire rope, but also change the included angle of the steel wire rope, making it easier to adjust the tension of the steel wire rope and improving the reliability and service life of the sensor.

[0064] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0065] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0066] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A three-pulley force transducer, characterized by: It includes a mounting frame (1), a force measuring device (2), and an adjusting guide device (3), wherein, The mounting bracket (1) is provided with a first mounting hole (101) and a second mounting hole (102). The second mounting hole (102) includes two holes and is symmetrically arranged on both sides of the first mounting hole (101). The force measuring device (2) is inserted into the first mounting hole (101) to measure the tension of the wire rope; The adjusting guide device (3) includes two devices, which are respectively inserted into the second mounting hole (102). The adjusting guide device (3) can be adjusted in position within the second mounting hole (102) to adjust the tension of the wire rope.

2. The three-pulley force transducer of claim 1, wherein, The adjusting guide device (3) includes a guide pulley (31), an eccentric adjusting plate (32), and a pulley shaft (33), wherein, The pulley shaft (33) is inserted on the guide pulley (31), and the guide pulley (31) is inserted into the second mounting hole (102) through the pulley shaft (33). The diameter of the pulley shaft (33) is smaller than the inner diameter of the second mounting hole (102). The eccentric adjustment plate (32) includes two plates, which are symmetrically arranged at both ends of the pulley shaft (33), and the two ends of the pulley shaft (33) are rotatably inserted into the corresponding eccentric adjustment plate (32).

3. A three-pulley force transducer according to claim 2, wherein, The eccentric adjustment plate (32) is provided with an eccentric hole (34) and an adjustment hole (35), wherein, The eccentric hole (34) is correspondingly provided with the pulley shaft (33), and the pulley shaft (33) is rotatably inserted into the eccentric hole (34); The adjustment hole (35) is located around the eccentric hole (34).

4. A three-pulley force transducer according to claim 3, wherein, The adjustment hole (35) is arranged around the center of the eccentric adjustment plate (32). The mounting bracket (1) is provided with a positioning hole (103) corresponding to the adjustment hole (35). The adjustment hole (35) and the positioning hole (103) can be connected by bolts to fix the eccentric adjustment plate (32) on the mounting bracket (1).

5. A three-pulley force transducer according to claim 4, wherein, The adjustment hole (35) is arc-shaped, and the bolt can slide along the adjustment hole (35) inside the adjustment hole (35).

6. The three-pulley force transducer of claim 1, wherein, The two second mounting holes (102) are located on top of the first mounting hole (101).

7. The three-pulley force sensor according to claim 1, characterized in that, The force measuring device (2) includes a force measuring pulley (21) and a force measuring sensor (22), wherein, The force sensor (22) is rotatably inserted into the first mounting hole (101); The force measuring pulley (21) is rotatably mounted on the force measuring sensor (22).

8. The three-pulley load cell of claim 1, wherein, The mounting bracket (1) includes a mounting plate (11) and a support shaft (12), wherein, The mounting plate (11) includes two symmetrically arranged plates. The force measuring device (2) and the adjusting guide device (3) are located between the two mounting plates (11). The first mounting hole (101) and the second mounting hole (102) are provided on the mounting plate (11). The support shaft (12) is located between two mounting plates (11), and the support shaft (12) can connect the two mounting plates (11) by bolts.

9. A three-pulley force transducer according to claim 8, wherein, The support shaft (12) includes multiple shafts, which are symmetrically arranged on the left and right sides of the force measuring device (2).

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