Zero-gravity screw torque testing equipment

Abstract

The utility model discloses zero-gravity screw torque testing equipment, which comprises a torsion testing device, a rotating platform and an air pressure lifting mechanism, the torsion testing device is located above the rotating platform, the axis of the torsion testing device is longitudinally arranged, a testing head is arranged along the bottom end of the axis of the torsion testing device, the upper end of a to-be-detected rod can be fixed to the testing head, and the axis of the to-be-detected rod coincides with the axis of the torsion testing device. When the to-be-detected rod descends and approaches, the fixing device is used for fixing the lower end of the to-be-detected rod; the rotating platform horizontally rotates around the shaft, the axis of the to-be-detected rod coincides with the rotating axis of the rotating platform, the testing head transmits torsion generated by the to-be-detected rod to the torsion testing device, and the torsion testing device is used for displaying the torsion. The coaxiality and the perpendicularity can be guaranteed, the testing accuracy is guaranteed, and the gravity of the torsion measuring device is balanced in an air pressure control mode.

Description

Technical Field

[0001] The utility model relates to the technical field of torque testing, and particularly relates to a zero-gravity screw torque testing device. Background Art

[0002] During the automated assembly process of screws, torque testing is required to meet the torque required for automated assembly. When manually holding the torque detection, it is difficult to ensure the coaxiality between the torque force device and the rod to be detected, and thus the accuracy of torque detection cannot be guaranteed. For existing torque testing devices, a lead screw and nut are usually used for lifting. Since the weight of the torque measuring device will cause pressure on the rod to be detected during the detection process, increasing the friction of the parts, it will also affect the result of torque measurement. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a zero-gravity screw torque testing device to solve the above technical problems. The torque measuring device is connected by a pneumatic lifting mechanism, and the pneumatic control method is used to drive the torque measuring device to lift and lower, and the gravity of the torque measuring device can be balanced by the pneumatic control method.

[0004] To achieve the above purpose, the solution of the utility model is: a zero-gravity screw torque testing device, including a torque testing device, a rotating platform and a pneumatic lifting mechanism;

[0005] The torque testing device is located above the rotating platform. The axis of the torque testing device is longitudinally arranged, and a test head is provided at the bottom end along its axis direction. The upper end of the rod to be detected can be fixed on the test head, and the lower end of the rod to be detected extends downward. The axis of the rod to be detected coincides with the axis of the torque testing device. A fixing device is provided at the top end of the rotating platform. The pneumatic lifting mechanism is connected to the torque testing device to drive the torque testing device to lift and lower, so that the test head drives the rod to be detected to approach or move away from the rotating platform. When the rod to be detected descends and approaches, the fixing device is used to fix the lower end of the rod to be detected;

[0006] The rotating platform rotates horizontally around an axis. When the lower end of the rod to be detected rotates horizontally with the rotating platform, the axis of the rod to be detected coincides with the rotation axis of the rotating platform. The test head transmits the torque generated by the rod to be detected to the torque testing device, and the torque testing device is used to display the torque.

[0007] Further, it further includes a control device, the control device includes a PLC controller, a solenoid valve and a pneumatic pressure regulating device. The PLC controller is electrically connected to the solenoid valve and the pneumatic pressure regulating device respectively. The pneumatic lifting mechanism includes a cylinder. The solenoid valve and the pneumatic pressure regulating device are respectively connected to the cylinder. The PLC controller controls the pneumatic pressure regulating device to adjust the input air pressure of the cylinder, so as to control the lifting speed of the test head, or controls the solenoid valve to pull down the torque testing device by the cylinder, or drives the cylinder to push up the torque testing device after reversing, so that the upward thrust generated by the cylinder can balance the gravity of the torque testing device.

[0008] Furthermore, it further includes a slide rail. The slide rail extends longitudinally. The lifting mechanism further includes a slide seat and a fixing bracket. The fixing bracket is arranged on the slide seat. The slide seat is slidably arranged on the slide rail. The cylinder is connected to the slide seat to drive the slide seat to drive the fixing bracket to slide up and down along the extending direction of the slide rail. The torque testing device is installed on the fixing bracket to drive the test head to lift up and down with the fixing bracket.

[0009] Further, it further includes a first slide table and a second slide table. The first slide table and the second slide table are used to adjust the horizontal displacement of the rod to be detected, so that the axis of the rod to be detected coincides with the horizontal rotation axis of the rotating platform. The first slide table is used to drive the rod to be detected to move left and right, and the second slide table is used to drive the rod to be detected to move back and forth.

[0010] Furthermore, it further includes a first sensor and a second sensor. The first sensor and the second sensor are longitudinally spaced apart. The first sensor is located above the second sensor and is respectively communicatively connected to the PLC controller. The first sensor and the second sensor are respectively used to monitor the displacement of the rod to be detected to transmit signals to the PLC controller. When the rod to be detected passes through the first sensor, the PLC controller controls the pneumatic pressure regulating device to make the input air pressure value of the cylinder be a first air pressure value. When the rod to be detected passes through the first sensor, the PLC controller controls the pneumatic pressure regulating device to make the input air pressure value of the cylinder be a second air pressure value.

[0011] Furthermore, the first sensor and the second sensor are arranged flush with the top side of the second sensor on the outer side surface of the cylinder. The distance between the first sensor and the second sensor is 10 mm.

[0012] Furthermore, the first air pressure value is A, and the second air pressure value is B, and A < B.

[0013] Furthermore, the rotating platform is connected with a rotating drive motor. The PLC controller is electrically connected to the rotating drive motor to control the rotating drive motor to drive the rotating platform to rotate.

[0014] Furthermore, the control device further includes a display screen, a pause button, an emergency stop button, and an alarm. The PLC controller is electrically connected to the display screen, the pause button, the emergency stop button, and the alarm respectively. The display screen is used to display the torque value and the number of rotation circles of the rotating platform. The pause button is used to control the cylinder to stop or resume operation. The emergency stop button is used to control the reset of the torque test. The alarm is used for alarming.

[0015] Further, it further includes a base and a support frame. The support frame is vertical, and its bottom end is fixed on the top surface of the base. The lifting mechanism and the control device are installed on the support frame. The rotating platform is rotatably arranged on the base and rotates horizontally relative to the base and is arranged on the base.

[0016] After adopting the above solution, the beneficial effects of the present utility model are as follows: By arranging the axis of the torque testing device longitudinally, the axis of the rod to be detected fixed on the test head coincides with its axis. The rotating platform is arranged below the torque testing device, and a fixing device is provided on its top side for fixing the lower end of the rod to be detected. When driving the rod to be detected to rotate horizontally, the rod to be detected is coaxial with the rotation of the rotating platform, making the torque testing device, the rod to be detected, and the rotating platform coaxial. Torque detection is carried out under the condition of ensuring coaxiality and perpendicularity, ensuring the accuracy of torque transmission and improving the accuracy of torque detection. In addition, the torque measuring device is connected by a pneumatic lifting mechanism, and the pneumatic control method is used to drive the torque measuring device to lift and can balance the gravity of the torque measuring device through the pneumatic control method. Description of the Drawings

[0017] Figure 1 is the structural schematic diagram of the present utility model.

[0018] Figure 2 is the structural schematic of the present utility model with the housing removed Figure 1 .

[0019] Figure 3 is the structural schematic of the present utility model with the housing removed Figure 2 .

[0020] Figure 4 is the structural schematic diagram of the lifting mechanism of the present utility model.

[0021] Figure 5 is the structural schematic diagram of the test head clamping the rod to be detected of the present utility model.

[0022] Figure 6 is the structural schematic diagram of the first sliding table or the second sliding table of the present utility model.

[0023] Figure 7 is the structural schematic diagram of the fixing device clamping the rod to be detected of the present utility model.

[0024] Figure 8 It is the flowchart of the control device of the present utility model.

[0025] Label description:

[0026] 100 – rod to be detected, 200 - nut, 1 - torque testing device, 2 - rotating platform, 3 - lifting mechanism, 4 - control device, 5 - test head, 6 - fixing device, 7 - slide rail, 8 - first slide table, 9 - second slide table, 10 - first sensor, 11 - second sensor, 12 - rotary drive motor, 13 - base, 14 - support frame, 31 - cylinder, 32 - slide seat, 33 - fixing frame, 41 - PLC controller, 42 - solenoid valve, 43 - air pressure regulating device, 44 - display screen, 45 - pause button, 46 - emergency stop button, 47 - alarm. Specific embodiments

[0027] The following will describe the present utility model in detail with reference to the accompanying drawings and specific embodiments.

[0028] In the claims, the specification and the above-mentioned drawings of the present utility model, unless otherwise clearly defined, for orientation terms, such as the use of terms "center", "horizontal", "longitudinal", "level", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", etc. to indicate the orientation or position relationship is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it should not be construed as limiting the specific protection scope of the present utility model.

[0029] As Figures 1 to 8 shown, the present utility model provides a zero-gravity screw torque testing device for testing the torque of a rod, which can be a screw or an ordinary rod without external threads. In this specific embodiment, the screw is used as the rod to be detected. This torque testing device includes a torque testing device 1, a rotating platform 2, a pneumatic lifting mechanism 3 and a control device 4;

[0030] Focusing on Figure 1 shown, the torque testing device 1 is located above the rotating platform 2. The axis of the torque testing device 1 is longitudinally arranged, and at the bottom along its axis direction, there is a test head 2. The upper end of the rod 100 to be detected can be fixed on the test head 5, and the lower end of the rod 100 to be detected extends downward. The axis of the rod 100 to be detected coincides with the axis of the torque testing device 1; Focusing on Figure 5As shown in the figure, the test head 5 is formed with a clamping channel 51. The top end of the rod 100 to be detected is placed into the clamping channel 51. The clamping channel 5 has an opening. It further includes a fixing rod 52. One end of the fixing rod 52 is screwed to the end of the opening, and the other end of the fixing rod 52 protrudes outside the test head 5. Rotating the fixing rod 52 can reduce or enlarge the opening to clamp or release the rod 100 to be detected. A fixing device 6 is provided at the top end of the rotating platform 2. The pneumatic lifting mechanism 3 is connected to the torque testing device 1 to drive the torque testing device 1 to move up and down, so that the test head 5 drives the rod to be detected to approach or move away from the rotating platform 2. When the rod 100 to be detected descends and approaches, the fixing device 6 is used to fix the lower end of the rod 100 to be detected. In this specific embodiment, a nut 200 is fixed on the fixing device 6, and the rod 100 is fixed by the cooperation of the screw 100 and the nut 200. The structure of the fixing device 6 is the same as that of the test head 5 and will not be specifically described here. Of course, in other embodiments, it can also be other structures as long as it can clamp the nut 200.

[0031] The rotating platform 2 rotates horizontally around an axis. When the fixing device 6 fixes the lower end of the rod 100 to be detected, the axis of the rod 100 to be detected coincides with the rotation axis of the rotating platform 2, ensuring the coaxiality of the torque testing device 1, the rod 100 to be detected, and the rotating platform 2, and ensuring the accuracy of torque transmission. When the lower end of the rod 100 to be detected rotates horizontally with the rotating platform 2, the test head 5 transmits the torque generated by the rod 100 to be detected to the torque testing device 1, and the torque testing device 1 is used to display the torque.

[0032] The rotating platform 2 is connected with a rotating drive motor 12. The rotating drive motor 12 can be any existing rotating motor without specific limitation. The PLC controller 41 is electrically connected to the rotating drive motor 12 to control the rotating drive motor 12 to drive the rotating platform 2 to rotate.

[0033] It further includes a control device 4 including a PLC controller 41, a solenoid valve 42, and a pneumatic pressure regulating device 43. The PLC controller 41 is electrically connected to the solenoid valve 42 and the pneumatic pressure regulating device 43 respectively. The pneumatic lifting mechanism 3 includes a cylinder 31. The solenoid valve 42 and the pneumatic pressure regulating device 43 are respectively connected to the cylinder 31. The PLC controller 41 controls the pneumatic pressure regulating device 43 to adjust the input air pressure of the cylinder 31 to control the lifting speed of the test head 5. The pneumatic pressure regulating device 43 is an existing electro-pneumatic proportional valve, or controls the solenoid valve 42 to pull down the torque testing device 1 by the cylinder 31, or drives the cylinder 31 to push up the torque testing device 1 after reversing, so that the upward thrust generated by the cylinder 31 can balance the gravity of the torque testing device 1. The solenoid valve 42 is an existing solenoid valve that can reverse the cylinder 31.

[0034] It further includes a base 13. The pneumatic lifting mechanism 3 and the control device 4 are installed on the base 13. The control device 4 is respectively connected to the pneumatic lifting mechanism 3 and the rotating platform 21. The rotating platform 2 is rotatably arranged on the base 13 and rotates horizontally relative to the base 13.

[0035] Focusing on the combination Figures 2 - 4 As shown, it further includes a slide rail 7 which extends longitudinally. It also includes a support frame 14 which is vertical. Its bottom end is fixed on the top surface of the base 13. The slide rail 7 is longitudinally fixed on the support frame 14. They can be snap-connected between them and fixed by bolts. The pneumatic lifting mechanism 3 is installed on the support frame 14. The pneumatic lifting mechanism 3 further includes a slide seat 32 and a fixing frame 33. The fixing frame 33 is arranged on the slide seat 32. The slide seat 32 is slidably arranged on the slide rail 7. The air cylinder 31 is connected to the slide seat 32 to drive the slide seat 32 to drive the fixing frame 33 to slide up and down along the extending direction of the slide rail 7. The torque testing device 1 is installed on the fixing frame 33 and moves up and down with the fixing frame 33. The setting of the slide rail 7 can play a guiding role in the lifting of the slide seat 32, ensuring the verticality during the lifting process, avoiding deflection during the lifting and lowering process of the torque testing device 1 driving the rod 100 to be detected, and ensuring the stability of the up and down lifting direction. Further, the PLC controller 41 controls the pneumatic regulating device 43 and the solenoid valve 42. Through the change of the input air pressure, during the downward movement of the torque testing device 1, the air cylinder 31 can reverse from the downward movement to upward, thereby generating an upward thrust, which can not only balance the gravity of the torque testing device 1 but also balance the friction force k generated during the sliding process of the slide rail 7.

[0036] In order to achieve that when the torque testing device 1 drives the rod 100 to be detected to descend, the PLC controller 41 can accurately adjust the output air pressure of the pneumatic regulating device 43 when the rod 100 to be detected descends to a predetermined position, it further includes a first sensor 10 and a second sensor 11. The first sensor 10 and the second sensor 11 are longitudinally spaced apart. The first sensor 10 is located above the second sensor 11. The first sensor 10 and the second sensor 11 are respectively communicatively connected to the PLC controller 41 to transmit signals to the PLC controller 41. When the rod 100 to be detected passes through the first sensor 10, the PLC controller 41 controls the pneumatic regulating device 43 to make the input air pressure value of the air cylinder 31 be the first air pressure value. When the rod 100 to be detected passes through the second sensor 11, the PLC controller 41 controls the pneumatic regulating device 43 to make the input air pressure value of the air cylinder 31 be the second air pressure value.

[0037] The first sensor 10 and the second sensor 11 are fixedly arranged on the outer side surface of the cylinder 31, and are flush with the top side of the rotating platform 2 of the second sensor 11. The input air pressure value when the cylinder 31 initially descends is the initial air pressure value. When the to-be-detected rod 100 descends past the first sensor 10, the input air pressure is the first air pressure value. That is, when the first sensor 10 detects that the to-be-detected rod 100 has passed, the first sensor 10 sends the detection information to the PLC controller 41. The PLC controller 41 controls the air pressure regulating device 43 to adjust the output air pressure, and the PLC controller 41 also controls the solenoid valve 42 to reverse the cylinder 31, so that the input air pressure of the cylinder 31 is adjusted to the first air pressure value. The initial air pressure value is greater than the first air pressure value, so that the upward thrust generated by the cylinder 31 is less than the gravity of the torque testing device 1, partially offsetting the gravity of the torque testing device 1, reducing the descending speed of the torque testing device 1, and making the torque testing device 1 descend slowly. When the to-be-detected rod 100 descends past the second sensor 11, the second sensor 11 sends the detection information to the PLC controller 41. The PLC controller 41 controls the air pressure regulating device 43 to adjust the output air pressure again, and the input air pressure value is the second air pressure value. The initial air pressure value is greater than the second air pressure value. At this time, the upward thrust generated by the cylinder 31 can balance the gravity of the torque testing device 1 and the friction force k during the sliding process of the slide rail 7.

[0038] Further, the first air pressure value is A, and the second air pressure value is B, and A < B.

[0039] B = G / (π(D / 2) 2 ) = (9.8K + k) / (π(D / 2) 2 );

[0040] Wherein, the cylinder diameter of the cylinder is D (m), the weight of the torque testing device 1 is K (kg), and the friction force of the slide rail 7 is k (N).

[0041] Further, the distance between the first sensor 10 and the second sensor 11 is 10 mm.

[0042] It also includes a first slide table 8 and a second slide table 9. The first slide table 8 and the second slide table 9 are used to adjust the horizontal displacement of the rod 100 to be detected. The first slide table 8 is used to drive the rod 100 to move left and right, and the second slide table 9 is used to drive the rod 100 to move forward and backward, so that the axis of the rod 100 to be detected coincides with the horizontal rotation axis of the rotary platform 2, ensuring the coaxiality between the two. Specifically, the first slide table 8 is arranged between the slide seat 32 and the fixed frame 33. The first slide table 8 includes a fixed plate 81 and a sliding plate 82. The sliding plate 81 moves left and right relative to the fixed plate 81. The fixed plate 81 is fixed on the slide seat 33, and the sliding plate 82 is connected to the fixed frame 33. It also includes a push rod 83. The push rod 83 is rotatably arranged on the fixed plate 81, and one end of it abuts against the sliding plate 82. When the push rod 83 rotates, the push rod 83 pushes the sliding plate 82 to slide left and right, and makes the fixed frame 33 drive the torque testing device 1 to move left and right to adjust the left and right displacement of the screw. The structure of the second slide table 9 is the same as that of the first slide table 8, so no specific description will be given here. The second slide table 9 is arranged on the bottom side of the slide rail 7. It also includes a mounting seat 15. The mounting seat 15 is fixed on the base 13. The second slide table 9 is arranged on the mounting seat 15. The sliding plate of the second slide table 9 slides back and forth, and its sliding plate is connected to the slide rail 7, driving the slide rail 7 to move back and forth, so that the fixed frame 33 moves back and forth accordingly, driving the torque testing device 1 to move back and forth to adjust the front and back displacement of the screw.

[0043] The control device 4 also includes a display screen 44, a pause button 45, an emergency stop button 46 and an alarm 47. The PLC controller 41 is electrically connected to the display screen 44, the pause button 45, the emergency stop button 46 and the alarm 47 respectively. The display screen 44 is used to display the torque value and the number of rotation circles of the rotary platform 2. The pause button 45 is used to control the cylinder 31 to stop running or resume running. The emergency stop button 46 is used to control the reset of the torque test, that is, to control the torque test to restore the initial settings. The alarm 47 is used for alarming. Specifically, the alarm 47 is an alarm lamp. The alarm 47 is connected to the air pressure output end of the air pressure regulating device 43 and the air pressure input end of the cylinder 31. When the input air pressure of the cylinder 31 is lower than the predetermined air pressure value, or when the cylinder 31 does not act, the alarm 47 lights up for alarm.

[0044] It also includes a lower shell 16 and an upper shell 17. The upper shell 17 covers the air pressure lifting mechanism 3, and the lower shell 16 covers the base 13. The pause button 45, the emergency stop button 46 and the alarm 47 are exposed on the surface of the lower shell 16 for easy operation.

[0045] The above are only the preferred embodiments of the present invention, and do not limit the design of this case. All equivalent changes made according to the key design of this case fall within the protection scope of this case.

Claims

1. A zero-gravity screw torque testing device, characterized in that: It comprises a torque testing device (1), a rotating platform (2) and a pneumatic lifting mechanism (3); The torque test device (1) is located above the rotating platform (2). The axis of the torque test device (1) is arranged longitudinally, and a test head (5) is provided at the bottom end along the axis direction thereof. The upper end of the rod to be tested (100) can be fixed on the test head (5), and the lower end of the rod to be tested (100) extends downward. The axis of the rod to be tested (100) coincides with the axis of the torque test device (1). A fixing device (6) is provided at the top of the rotating platform (2). The pneumatic lifting mechanism (3) is connected to the torque test device (1) to drive the torque test device (1) to move up and down, so that the test head (5) drives the rod to be tested to approach or move away from the rotating platform (2). When the rod to be tested (100) moves down and approaches, the fixing device (6) is used to fix the lower end of the rod to be tested (100). The rotating platform (2) rotates horizontally around an axis, so that when the lower end of the rod to be tested (100) rotates horizontally along with the rotating platform (2), the axis of the rod to be tested (100) coincides with the rotation axis of the rotating platform (2), and the test head (5) transmits the torque generated by the rod to be tested (100) to the torque testing device (1), and the torque testing device (1) is used to display the torque.

2. The zero-gravity screw torque testing device according to claim 1, characterized in that: The invention also comprises a control device (4), wherein the control device (4) comprises a PLC controller (41), a solenoid valve (42) and a gas pressure regulating device (43), wherein the PLC controller (41) is electrically connected to the solenoid valve (42) and the gas pressure regulating device (43), respectively; the gas pressure lifting mechanism (3) comprises a cylinder (31), wherein the solenoid valve (42) and the gas pressure regulating device (43) are respectively connected to the cylinder (31), and the PLC controller (41) controls the gas pressure regulating device (43) to adjust the input gas pressure of the cylinder (31) to control the lifting speed of the test head (5), or controls the solenoid valve (42) to make the cylinder (31) pull down the torque test device (1), or drives the cylinder (31) to push up the torque test device (1) after reversing, so that the cylinder (31) generates an upward thrust to balance the gravity of the torque test device (1).

3. The zero-gravity screw torque testing device according to claim 2, characterized in that: The invention also comprises a slide rail (7), wherein the slide rail (7) extends longitudinally. The pneumatic lifting mechanism (3) further comprises a slide seat (32) and a fixed frame (33), wherein the fixed frame (33) is arranged on the slide seat (32), and the slide seat (32) is slidably arranged on the slide rail (7). The cylinder (31) is connected to the slide seat (32) to drive the slide seat (32) to drive the fixed frame (33) to slide up and down along the extension direction of the slide rail (7). The torque testing device (1) is installed on the fixed frame (33) to drive the test head (5) to rise and fall with the fixed frame (33).

4. The zero-gravity screw torque testing device according to claim 1, characterized in that: The invention also comprises a first slide (8) and a second slide (9), wherein the first slide (8) and the second slide (9) are used to adjust the horizontal displacement of the rod to be detected (100) so that the axis of the rod to be detected (100) coincides with the horizontal rotation axis of the rotating platform (2); the first slide (8) is used to drive the rod to be detected (100) to move left and right, and the second slide (9) is used to drive the rod to be detected (100) to move forward and backward.

5. The zero-gravity screw torque testing device according to claim 2, characterized in that: The invention also comprises a first sensor (10) and a second sensor (11), wherein the first sensor (10) and the second sensor (11) are arranged at an interval in the longitudinal direction, the first sensor (10) is located above the second sensor (11) and is respectively connected to a PLC controller (41) for communication, the first sensor (10) and the second sensor (11) are respectively used to monitor the displacement of the rod (100) to be detected, so as to transmit a signal to the PLC controller (41), so that when the rod (100) to be detected passes through the first sensor (10), the PLC controller (41) controls the air pressure regulating device (43) so that the input air pressure value of the cylinder (31) is a first air pressure value, and when the rod (100) to be detected passes through the first sensor (10), the PLC controller (41) controls the air pressure regulating device (43) so that the input air pressure value of the cylinder (31) is a second air pressure value.

6. The zero-gravity screw torque testing device according to claim 5, characterized in that: The first sensor (10) and the second sensor (11) are arranged on the outer side of the cylinder (31), the second sensor (11) is flush with the top side of the rotating platform (2), and the distance between the first sensor (10) and the second sensor (11) is 10 mm.

7. The zero-gravity screw torque testing device according to claim 5, characterized in that: The first air pressure value is A, the second air pressure value is B, A <B。 8. The zero-gravity screw torque testing device according to claim 2, characterized in that: The rotating platform (2) is connected to a rotating drive motor (12), and the PLC controller (41) is electrically connected to the rotating drive motor (12) to control the rotating drive motor (12) to drive the rotating platform (2) to rotate.

9. The zero-gravity screw torque testing device according to claim 2, characterized in that: The control device (4) further comprises a display screen (44), a pause button (45), an emergency stop button (46) and an alarm (47). The PLC controller (41) is electrically connected to the display screen (44), the pause button (45), the emergency stop button (46) and the alarm (47), respectively. The display screen (44) is used to display the torque value and the number of rotations of the rotating platform (2). The pause button (45) is used to control the cylinder (31) to stop running or resume running. The emergency stop button (46) is used to control the resetting of the torque test. The alarm (47) is used to alarm.

10. The zero-gravity screw torque testing device according to claim 1, characterized in that: The invention also comprises a base (13) and a support frame (14). The support frame (14) is vertical, and its bottom end is fixed on the top surface of the base (13). The air pressure lifting mechanism (3) and the control device (4) are installed on the support frame (14). The rotating platform (2) is rotatably arranged on the base (13), rotates horizontally relative to the base (13), and is arranged on the base (13).

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