A torque detector for fasteners

Abstract

The utility model discloses a kind of torque detectors of fastener, it is related to torque tester field, and this kind of torque detector of fastener includes base, base top surface is fixed with stand, two stand outer sides are fixed with mounting plate, and the middle part of mounting plate is fixed with electric push rod;This kind of torque detector of fastener is cooperatively designed through double static torque sensor and rotatable mounting disc, so that two sensors can be alternately aligned to lower clamp, two sets of system data can be compared in real time during testing, cross-validation result accuracy, eliminate single sensor system error risk, significantly improve detection credibility, especially suitable for high-precision calibration scene.

Description

Technical Field

[0001] This utility model relates to the field of torque testers, and more particularly to a torque detector for fasteners. Background Technology

[0002] In the field of fastener torque testing, traditional equipment, equipped with only a single static torque sensor, cannot perform real-time data comparison and verification during testing. This results in a lack of internal calibration basis for the test results, making it difficult to guarantee accuracy. Furthermore, the use of a single static torque sensor means that in the event of a sensor failure, the sensor must be replaced before testing can continue. This significantly impacts the testing efficiency for workshops specializing in test calibration. Utility Model Content

[0003] To overcome the shortcomings of existing technologies, the purpose of this utility model is to provide a torque detector for fasteners, which solves the problems of traditional torque testing equipment that uses a single static torque sensor for testing, which cannot perform data comparison and verification, makes it difficult to guarantee the accuracy of the test results, and only allows for sensor replacement after a failure, thus affecting testing efficiency.

[0004] To address the problems in the existing technology, the technical solution of this utility model is as follows:

[0005] A torque detector for fasteners includes a base, with columns symmetrically fixed to the top surface of the base. Mounting plates are fixed to the outer sides of the two columns, and an electric push rod is fixed to the center of the mounting plates. Two static torque sensors are mounted on the extended ends of the electric push rod. An upper clamp is fixed to the end of each static torque sensor facing away from the electric push rod. A rotating device is mounted on the top surface of the base, and a lower clamp is fixed to the output end of the rotating device. One upper clamp faces the lower clamp directly, while the other upper clamp faces to one side. The angles of the two static torque sensors are limited by a limiting device. After the limiting device is unlocked, the two static torque sensors can be adjusted so that either static torque sensor is vertically downward and facing the lower clamp.

[0006] Optionally, the extended end of the electric push rod is fixed with an n-shaped frame, the lower end of the n-shaped frame is rotatably connected to a rotating shaft via a bearing, two mounting plates are fixed in the middle of the rotating shaft, the axes of the two mounting plates are perpendicular, and two static torque sensors are respectively fixed on the two mounting plates.

[0007] Optionally, the limiting device includes a limiting strip that is slidably installed in two longitudinally arranged grooves at both ends of the n-shaped frame. The two ends of the limiting strip extend beyond the two grooves to both sides of the n-shaped frame and bend downward at a 90° angle to form a bent portion. A pair of slots are opened at each end of the rotating shaft. The openings of the two slots in each pair face away from the two upper clamps. The bent portion is inserted into the slot whose opening faces away from one of the vertically downward upper clamps.

[0008] Optionally, a slider is fixed on each of the two bent portions on opposite sides, and the two sliders are slidably nested in the two grooves respectively. Two springs are symmetrically fixed between the top surface of the limiting strip and the inner wall of the top of the n-shaped frame, and the opening of the slot is rounded.

[0009] Optionally, the limiting device also has another structure, including a worm gear reducer motor fixed on one side of the outer wall of the n-shaped frame, with one end of the rotating shaft near the worm gear reducer motor fixed to the output end of the worm gear reducer motor.

[0010] Compared with the prior art, the advantages of this utility model are as follows:

[0011] 1. This utility model, through the collaborative design of dual static torque sensors and a rotatable mounting plate, enables the two sensors to alternately align with the lower fixture for operation. During testing, the data from the two systems can be compared in real time to cross-verify the accuracy of the results, eliminate the risk of errors in a single sensor system, and significantly improve the reliability of the detection. It is especially suitable for high-precision calibration scenarios.

[0012] 2. When any sensor fails, simply unlock the limit device and rotate the shaft to quickly switch the backup sensor to the working position (vertically facing down and directly opposite the lower fixture), without disassembling any parts or stopping the machine. This significantly reduces maintenance time, ensures continuous testing, and especially meets the high-frequency, high-efficiency testing needs of third-party testing organizations. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a schematic diagram showing the position of the spring in this utility model.

[0015] Figure 3 This is a schematic diagram of the n-shaped frame structure of this utility model.

[0016] Figure 4 This is a schematic diagram of Embodiment 2 of the present invention.

[0017] Reference numerals in the attached drawings: 1. Base; 2. Column; 3. Mounting plate; 4. Electric push rod; 5. N-shaped frame; 6. Rotating shaft; 7. Mounting plate; 8. Static torque sensor; 9. Upper clamp; 10. Lower clamp; 11. Slide groove; 12. Slider; 13. Limiting strip; 14. Bending part; 15. Spring; 16. Slot; 17. Worm gear reducer motor; 18. Rotating device. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Example 1, please refer to Figures 1 to 3 This embodiment provides a torque detector for fasteners, including a base 1, with columns 2 symmetrically fixed on the top surface of the base 1, mounting plates 3 fixed on the outer sides of the two columns 2, an electric push rod 4 fixed in the middle of the mounting plate 3, an n-shaped frame 5 fixed at the extended end of the electric push rod 4, a rotating shaft 6 rotatably connected to the lower end of the n-shaped frame 5 via a bearing, two mounting discs 7 fixed in the middle of the rotating shaft 6, the axes of the two mounting discs 7 being perpendicular, and two static torque sensors 8 respectively fixed on the two mounting discs 7.

[0020] The height of the static torque sensor 8 is adjusted by the electric push rod 4, because the specific height of the static torque sensor 8 needs to be adjusted according to the length of the fastener to be tested, so as to ensure that the fastener can be installed between the static torque sensor 8 and the top surface of the base 1.

[0021] The static torque sensor 8 is fixed to an upper clamp 9 at one end away from the electric push rod 4. A rotating device 18 is installed on the top surface of the base 1. A lower clamp 10 is fixed to the output end of the rotating device 18. The two static torque sensors 8 can be adjusted so that either static torque sensor 8 is vertically downward and facing the lower clamp 10. By operating the upper clamp 9 and the lower clamp 10, the fastener is placed between them, and the upper clamp 9 and the lower clamp 10 clamp the upper and lower ends of the fastener respectively, thus completing the connection and installation of the fastener. Both the upper clamp 9 and the lower clamp 10 can directly adopt existing mature clamp structures, which have been fully disclosed in the prior art and are mature existing technologies. Therefore, it is not necessary to elaborate on their structural layout and working principle.

[0022] After the fastener is installed, the drive rotation device 18 is activated, which drives the lower clamp 10 to rotate the lower end of the fastener, thus enabling torque testing. The rotation device 18 is a mature technology in existing torque testing devices and will not be elaborated further.

[0023] Slider 12 is slidably installed in the two longitudinally arranged grooves 11 at both ends of the n-shaped frame 5. Limiting strips 13 are fixed to the outer walls of the two sliders 12. Two springs 15 are symmetrically fixed between the top surface of the limiting strips 13 and the top inner wall of the n-shaped frame 5. The two ends of the limiting strips 13 extend beyond the two grooves 11 to the two sides of the n-shaped frame 5 and bend downwards at 90 degrees to form a bent part 14. A pair of slots 16 are opened at each end of the rotating shaft 6. The openings of the two slots 16 in each pair face away from the two upper clamps 9. Under the action of the springs 15, the limiting strips 13 always have a downward sliding tendency, so that the bent part 14 is inserted into the slot 16 whose opening is opposite to one of the vertically downward upper clamps 9. The rounded corners of the openings of the slots 16 make it easier to insert the bent part 14 and make the insertion smoother.

[0024] Before daily testing, the test piece can be used to test whether the detection values ​​of the two static torque sensors 8 are consistent, or whether the difference is within a certain range. By rotating the shaft 6, the positions of the two static torque sensors 8 are switched so that the two static torque sensors 8 are alternately vertically downward. The torque of the test piece is detected by the two static torque sensors 8 respectively, and the torque value when the test piece breaks is compared. Before switching, the shaft 6 needs to be unlocked. Unlocking is done by pushing the limit bar 13, which slides the limit bar 13 upward, so that the two bent parts 14 are pulled out from the slot 16. Then, push any one of the mounting plates 7 to make the shaft 6 rotate, so that the other upper clamp 9 is vertically downward. Then release the limit bar 13, so that the two bent parts 14 are inserted back into the corresponding slot 16, and the shaft 6 is locked.

[0025] This embodiment utilizes a collaborative design of dual static torque sensors 8 and a rotatable mounting plate 7 to enable alternating operation of the two systems and real-time data cross-verification, eliminating errors from a single sensor system and significantly improving detection reliability. Simultaneously, it supports rapid rotation and switching of the backup sensor to the working position in case of failure, without requiring disassembly or machine downtime, greatly shortening maintenance time, ensuring continuous testing, and meeting the needs of high-frequency testing.

[0026] Example 2, please refer to Figure 4 The difference between this embodiment and Embodiment 1 is that a worm gear reducer motor 17 is fixed on one outer wall of the n-shaped frame 5, and the end of the rotating shaft 6 near the worm gear reducer motor 17 is fixed to the output end of the worm gear reducer motor 17. Unlike Embodiment 1, the two rotating shafts 6 are automatically rotated by the worm gear reducer motor 17 to complete the position switching of the two static torque sensors 8. The self-locking property of the worm gear reducer motor 17 is used to lock the position of the rotating shaft 6. The automatic adjustment saves more operation steps and is more convenient to use.

[0027] The 90-degree rotation of the rotating shaft 6 is achieved by motor rotation control. The main drive motor in the worm gear reducer motor 17 is a servo motor or a closed-loop stepper motor, which can achieve precise angle control.

[0028] 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 torque detector for fasteners, comprising a base (1), with columns (2) symmetrically fixed to the top surface of the base (1), mounting plates (3) fixed to the outer sides of the two columns (2), and an electric push rod (4) fixed to the middle of the mounting plate (3), characterized in that, Two static torque sensors (8) are installed at the extended end of the electric push rod (4). An upper clamp (9) is fixed at the end of the static torque sensor (8) away from the electric push rod (4). A rotating device (18) is installed on the top surface of the base (1). A lower clamp (10) is fixed at the output end of the rotating device (18). One of the upper clamps (9) faces the lower clamp (10), and the other upper clamp (9) faces to one side. The angles of the two static torque sensors (8) are limited by a limiting device. After the limiting device is unlocked, the two static torque sensors (8) can be adjusted so that any one of the static torque sensors (8) faces vertically downwards and directly faces the lower clamp (10).

2. The torque detector for fasteners according to claim 1, characterized in that, The extended end of the electric push rod (4) is fixed with an n-shaped frame (5). The lower end of the n-shaped frame (5) is rotatably connected to a rotating shaft (6) through a bearing. Two mounting plates (7) are fixed in the middle of the rotating shaft (6). The axes of the two mounting plates (7) are perpendicular. Two static torque sensors (8) are fixed on the two mounting plates (7) respectively.

3. The torque detector for fasteners according to claim 2, characterized in that, The limiting device includes a limiting strip (13) that is slidably installed in two longitudinally arranged slide grooves (11) at both ends of the n-shaped frame (5). The two ends of the limiting strip (13) extend beyond the two slide grooves (11) to both sides of the n-shaped frame (5) and bend downward at 90 degrees to form a bent part (14). A pair of slots (16) are opened at each end of the rotating shaft (6). The openings of the two slots (16) in each pair are opposite to the two upper clamps (9). The bent part (14) is inserted into the slot (16) whose opening is opposite to one of the vertically downward upper clamps (9).

4. The torque detector for fasteners according to claim 3, characterized in that, Each of the two bent portions (14) has a slider (12) fixed on one side opposite to the other, and the two sliders (12) are respectively slidably nested in the two grooves (11).

5. The torque detector for fasteners according to claim 3, characterized in that, Two springs (15) are symmetrically fixed between the top surface of the limiting strip (13) and the inner wall of the top of the n-shaped frame (5).

6. The torque detector for fasteners according to claim 3, characterized in that, The opening of the slot (16) is rounded.

7. The torque detector for fasteners according to claim 2, characterized in that, The limiting device includes a worm gear reducer motor (17) fixed on the outer wall of one side of the n-shaped frame (5), and the end of the rotating shaft (6) near the worm gear reducer motor (17) is fixed to the output end of the worm gear reducer motor (17).

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