Electronic adjustable twisting and pulling force detection device

Abstract

The utility model discloses an electronic adjustable torsion and tension detection device. The device mainly comprises a fixed support, a lifting support, an angle adjusting mechanism, a supporting and stabilizing mechanism, a servo motor driving unit, a torsion measuring unit, a tension measuring unit and a controller. The utility model provides an electronic adjustable torsion and tension force detection device, which can control the axial tension force value, the tension force keeping time, the torsion force value and the torsion force keeping time, can carry out controllable test on tension and rotation of a power supply flexible cord, a plug, an operation knob or other electrical devices, and has higher practicability.

Description

Technical Field

[0001] This utility model relates to an electronically adjustable torque and tension testing device, belonging to the technical field of torque and tension measuring devices for components such as power cords, plugs, and operating knobs in medical electrical equipment. Background Technology

[0002] GB9706.28-2006, "Medical Electrical Equipment - Part 2: Particular Requirements for Safety of Ventilators," section 57.3, tests the power cord plug for detachment from the equipment's input port. For this test, it is difficult to manually pull out the set force value and maintain it for 1 minute. Furthermore, if the tested electrical equipment weighs over 4 kg, a tensile force of 100 N must be applied to the power cord. GB9706.1-2020, "Medical Electrical Equipment - Part 1: General Requirements for Basic Safety and Basic Performance," section 8.11.3.4, regarding wire securing components, requires that the wire withstand 25 pulls on its sheath under a certain tensile force. The pulling force should be applied in the most unfavorable direction, but not swiftly. Each pull should last for 1 second, followed immediately by the wire enduring a certain torque for 1 minute. GB9706.1-2020 "Medical Electrical Equipment - Part 1: General Requirements for Basic Safety and Basic Performance" states in section 15.4.6 that the operating components of the controller of medical electrical equipment must be fixed to prevent misadjustment. The requirement is verified by applying an axial force of 60N to the electrical components and an axial force of 100N to other components for 1 minute. Utility Model Content

[0003] Based on the above, this utility model provides an electronically adjustable torque and tension testing device that can meet the testing requirements of GB9706.28-2006 "Medical Electrical Equipment - Part 2: Particular Requirements for Safety of Ventilators" (57.3) for the test of power cord plug detachment from the equipment input port, GB9706.1-2020 "Medical Electrical Equipment - Part 1: General Requirements for Basic Safety and Basic Performance" (8.11.3.4) for wire fixing parts, and GB9706.1-2020 "Medical Electrical Equipment - Part 1: General Requirements for Basic Safety and Basic Performance" (15.4.6) for the testing of fixing and preventing misadjustment of operating parts of medical electrical equipment controllers. During the test, the electronically adjustable torque and tension testing device can control the magnitude of the axial tensile force and the holding time, and can control the magnitude of the torque and the holding time, enabling controllable testing of the tension and rotation of power cords, plugs, operating knobs, or other electrical components.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An electronically adjustable torque and tension testing device mainly includes a fixed bracket, a lifting bracket, an angle adjustment mechanism, a support and stabilization mechanism, a servo motor drive unit, a torque measuring unit, a tension measuring unit, and a controller. The fixed bracket is used to bear weight and fix the testing device. The lifting bracket is installed on one side of the fixed bracket and is used to adjust the working height of the testing device to accommodate devices of different heights. The angle adjustment mechanism is located on a lead screw on the lifting bracket and is mechanically connected to the support and stabilization mechanism, enabling angle adjustment of the support and stabilization mechanism. The support and stabilization mechanism supports and securely connects the servo motor drive unit, the torque measuring unit, and the tension measuring unit. The servo motor drive unit provides rotational torque for testing and is fixed to the support and stabilization unit. The torque measuring unit and the tension measuring unit measure torque and tension values, respectively. The controller controls the operation of the entire device and is electrically connected to the servo motor drive unit, the torque measuring unit, and the tension measuring unit.

[0006] The aforementioned lifting bracket is equipped with a rocker arm and a lead screw. The rocker arm is manually cranked to move the lead screw to adapt to the height of the device being tested. Specifically, the lifting bracket drives the angle adjustment mechanism to move up and down. The angle of the support and stabilizing mechanism is changed by the rotating shaft of the angle adjustment mechanism, and locked by the angle adjustment knob to adapt to the needs of multi-angle testing.

[0007] The aforementioned servo motor drive unit mainly includes a servo motor, a reducer, a coupling, and a drive screw. The output shaft of the servo motor is inserted into the reducer, and the locking screw on the reducer is tightened by operating the locking screw on the reducer through the deformable clamp provided inside the reducer. Then, a drive screw is connected through the coupling.

[0008] The aforementioned support and stabilization mechanism includes a series of mechanical components for support and stabilization, ensuring that the torque transmitted from the coupling to the drive screw can be output smoothly. It mainly includes a frame structure, a first stabilizing component, a second stabilizing component, and a slider. The frame structure is used to install the servo motor drive unit and fix the first and second stabilizing components. The first stabilizing component has a central hole to allow the drive screw to pass through. The second stabilizing component also has a central hole, through which a bearing is connected to the drive screw, ensuring that the drive screw drives the torque measuring unit to rotate normally. The slider is connected to the drive screw via a screw nut. When the coupling transmits the torque output from the servo motor through the reducer to the drive screw, it can drive the slider to move back and forth, converting rotational motion into linear motion. The first stabilizing component, slider, and second stabilizing component are securely connected by a smooth rod, with the slider running between the first and second stabilizing components. Furthermore, a smooth rod is mechanically connected above the slider and second stabilizing component, and a dovetail groove mechanism is used for quick connection to the tension measuring unit.

[0009] The aforementioned torque measurement unit mainly includes a three-jaw chuck, a quick-clamping mechanism, and a torque sensor. The three-jaw chuck is used to clamp the tested flexible wire, plug, and operating knob, and is mechanically connected to one end of the quick-clamping mechanism. The quick-clamping mechanism is used to quickly clamp the torque sensor, and the dovetail groove mechanism at both ends enables quick connection between the three-jaw chuck and the drive screw. The torque sensor is used to measure the rotational torque value of the drive screw.

[0010] The aforementioned tensile force measurement unit mainly includes a three-jaw chuck, a quick-clamping mechanism, and a tensile force sensor. The three-jaw chuck is used to clamp the tested flexible wire, plug, and operating knob, and is mechanically connected to one end of the quick-clamping mechanism. The quick-clamping mechanism is used to quickly clamp the tensile force sensor. The dovetail groove mechanism at both ends enables quick connection between the three-jaw chuck and the slider, as well as the optical rod located above the second stabilizing member. The tensile force sensor is used to measure the tensile force generated by the linear motion of the slider driven by the drive screw.

[0011] The aforementioned controller mainly includes a data acquisition and processing module, a microprocessor module, a display output module, and a power supply module. The data acquisition and processing module is used to acquire the torque and tension data measured by the torque measurement unit and the tension measurement unit, and connects them to the input port of the microprocessor module. The microprocessor module drives the servo motor and the reducer to work, and sets the test time through an internal timer. The display output module displays and outputs the torque and tension data acquired by the microprocessor module. The power supply module completes voltage conversion and is used to supply power to the torque measurement unit, the tension measurement unit, the servo motor, the reducer, the data acquisition and processing module, the microprocessor module, and the display output module.

[0012] The aforementioned testing device also includes a support frame, which mainly consists of a support rod, a lifting rod, and locking bolts. It is mounted on the support and stabilization mechanism via a rotating shaft and bolts. During tensile testing, the lifting rod can be extended to adjust the angle of the support frame as needed. After being locked with bolts, the support frame supports the device under test, preventing test errors caused by the device tilting due to external force during tensile testing.

[0013] This utility model provides an electronically adjustable torque and tension testing device, which has the following significant advantages: 1. The lifting bracket is adapted to the height of most medical electrical equipment; 2. The microprocessor-controlled servo motor drive unit can provide the required torque value and holding time for measurement; 3. The design of the slider of the supporting and stabilizing mechanism converts torque into linear motion, realizing the magnitude of axial tensile force and the holding time of tension; 4. The dovetail groove mechanism design ensures convenient switching between torque testing and tension testing; 5. The three-jaw chuck is compatible with the stretching and rotation of various power cords, plugs, operating knobs, or other electrical devices. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a partial structural diagram of the torque measuring unit of this utility model;

[0017] Figure 3 This is a partial structural diagram of the tensile force measuring unit of this utility model;

[0018] Figure 4 This is a schematic diagram of the tensile force measuring unit of this utility model;

[0019] Figure 1The components are: 1. Fixed bracket; 2. Lifting bracket; 21. Rocker arm; 22. Lead screw; 3. Angle adjustment mechanism; 4. Support and stabilization mechanism; 5. Servo motor drive unit; 6. Torque measurement unit; 7. Tension measurement unit; 8. Controller; 9. Support frame.

[0020] Figure 2 , 3 4. In the middle: 31. Angle adjustment mechanism knob; 32. Rotating shaft; 41. First stabilizing component; 42. Second stabilizing component; 43. Slider; 51. Servo motor; 52. Reducer; 53. Coupling; 54. Drive screw; 61. Quick clamping mechanism; 62. Torque sensor; 63. Three-jaw chuck; 71. Tension sensor. Detailed Implementation

[0021] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] like Figure 1 The electronically adjustable torque and tension testing device shown mainly includes a fixed bracket 1, a lifting bracket 2, an angle adjustment mechanism 3, a support and stabilization mechanism 4, a servo motor drive unit 5, a torque measuring unit 6, a tension measuring unit 7, and a controller 8. The fixed bracket 1 is used to bear weight and fix the testing device. The lifting bracket 2 is installed on one side of the fixed bracket 1 and is used to adjust the working height of the testing device to accommodate devices of different heights. The angle adjustment mechanism 3 is mounted on a lead screw 22 on the lifting bracket 2 and is mechanically connected to the support and stabilization mechanism 4, enabling angle adjustment of the support and stabilization mechanism 4. The support and stabilization mechanism 4 supports and stabilizes the servo motor drive unit 5, the torque measuring unit 6, and the tension measuring unit 7. The servo motor drive unit 5 provides the rotational torque for testing and is fixed to the support and stabilization mechanism 4. The torque measuring unit 6 and the tension measuring unit 7 measure torque and tension values, respectively. The controller 8 controls the operation of the entire device and is electrically connected to the servo motor drive unit 5, the torque measuring unit 6, and the tension measuring unit 7.

[0023] The aforementioned lifting bracket 2 is equipped with a rocker arm 21 and a lead screw 22. The rocker arm 21 is manually cranked to move the lead screw 22 to adapt to the height of the device being tested. Specifically, the lifting bracket 2 drives the angle adjustment mechanism 3 to move up and down. The angle adjustment mechanism 3 is equipped with a rotating shaft 32 to change the angle of the support and stabilization mechanism 4, and is locked by the angle adjustment knob 31 to adapt to the needs of multi-angle testing.

[0024] like Figure 2 , 3The servo motor drive unit 5 mainly includes a servo motor 51, a reducer 52, a coupling 53, and a drive screw 54. The output shaft of the servo motor 51 is inserted into the reducer 52. After the reducer 52 is tightened by the locking screw on the reducer 52 through the deformable clamp provided inside the reducer 52, a drive screw 54 is connected through the coupling 53.

[0025] The aforementioned support and stabilization mechanism 4 includes a series of mechanical components for support and stabilization, ensuring that the torque transmitted from the coupling 53 to the drive screw 54 can be output smoothly. Furthermore, the support and stabilization mechanism 4 is also provided with a slider 43, which has a central opening and is connected to the drive screw 54 through a screw nut. When the coupling 53 transmits the torque output from the servo motor 51 through the reducer 52 to the drive screw 54, it can drive the slider 43 to move, converting the rotational motion into the linear motion of the slider.

[0026] like Figure 2 , 3 The supporting and stabilizing mechanism 4 includes a frame structure for mounting the servo motor drive unit, and also provides a first stabilizing member 41 and a second stabilizing member 42, both of which are fixed to the frame structure. The first stabilizing member 41 has a central opening to facilitate the normal operation of the drive screw. The second stabilizing member 42 has a central opening and is connected to the drive screw 54 through a bearing installed in the opening. The first stabilizing member 41, the slider 43, and the second stabilizing member 42 are stabilized by a smooth rod, and the slider 43 runs between the first stabilizing member 41 and the second stabilizing member 42. Furthermore, a smooth rod is mechanically connected above the slider and the second stabilizing member, and is quickly connected to the tension measuring unit 7 through a dovetail groove mechanism.

[0027] like Figure 2 The torque measuring unit 6 shown mainly includes a three-jaw chuck 63, a quick clamping mechanism 61, and a torque sensor 62. The three-jaw chuck 63 is used to clamp the tested wire, plug, and operating knob, etc., and is mechanically connected to one end of the quick clamping mechanism 61. The quick clamping mechanism 61 is used to quickly clamp the torque sensor 62, and the dovetail groove mechanism at both ends enables quick connection between the three-jaw chuck 63 and the drive screw 54. The torque sensor 62 is used to measure the rotational torque value of the drive screw 54.

[0028] like Figure 3 , 4The tensile force measuring unit 7 shown mainly includes a three-jaw chuck 63, a quick clamping mechanism 61, and a tensile force sensor 71. The three-jaw chuck 63 is used to clamp the tested flexible wire, plug, and operating knob, etc., and is mechanically connected to one end of the quick clamping mechanism 61. The quick clamping mechanism 61 is used to quickly clamp the tensile force sensor 71. The dovetail groove mechanism at both ends enables quick connection between the three-jaw chuck 63 and the slider 43, and the optical rod provided above the second stabilizing member 42. The tensile force sensor 71 is used to measure the tensile force generated by the linear motion of the slider 43 driven by the drive screw 54.

[0029] like Figure 2 , 3 The testing device shown also includes a support frame 9, which mainly includes a support rod, a lifting rod, and fastening bolts. It is mounted on the support and stabilization mechanism 4 via a rotating shaft and bolts. When applying tension, the lifting rod can be extended to adjust the angle as needed. After being locked with bolts, it supports the device under test and prevents the device under test from tilting during the tension test, thus preventing test errors.

[0030] like Figure 1 , 2 The testing device shown, when performing torque testing on the plug or operating knob of the medical electrical equipment under test: 1) Adjust the testing device by means of the rotating shaft 32 of the angle adjustment mechanism 3 to ensure that the three-jaw chuck 63 can firmly grip the plug or operating knob under test, and then lock it by means of the knob 31 of the angle adjustment mechanism; 2) Start the controller 8 and slowly control the servo motor 51 to work from low speed to high speed. After being reduced in speed by the reducer 52, the controller 8 drives the coupling 53 to drive the drive screw 54 to rotate. The controller 8 collects the torque value of the torque sensor 62; 3) When the collected torque value reaches the set threshold... When the timer set in the controller 8 starts and holds, the display module set in the controller 8 displays the current torque value of the torque sensor 62 and the countdown of the holding time; 4) If the operator observes that the torque value is stable during the holding time and there is no change in the plug or operating knob under test, then the torque test of the plug or operating knob under test is considered to be normal. If the torque value of the current torque sensor 62 displayed by the display module decreases during the holding time, or even if the plug or operating knob held by the three-jaw chuck 63 slips or falls off, then the test of the plug or operating knob under test is considered to be unsuccessful.

[0031] like Figure 1 , 3The testing device shown, when performing tensile testing on plugs, operating knobs, etc., of the medical electrical equipment under test: 1) Remove the torque measuring unit 6, install the tensile measuring unit 7, and adjust the testing device through the rotating shaft 32 of the angle adjustment mechanism 3 to ensure that the three-jaw chuck 63 can firmly grip the plug or operating knob under test, and then lock it through the knob 31 of the angle adjustment mechanism; 2) Adjust the length and angle of the support rod of the support frame 9 to ensure that the support frame supports the equipment under test, and then lock it through bolts; 3) When clamping the flexible wire, the angle adjustment mechanism 3 is not required; 4) The controller 8 starts working, slowly controlling the servo motor 51 to work from low speed to high speed, and after being reduced by the reducer 52, it drives the coupling 53 to drive the drive screw 54 to rotate. The moving lead screw 54 drives the slider 43 to move linearly through the lead screw nut to provide axial tension; 5) The controller 8 collects the tension value of the tension sensor 71. When the collected tension value reaches the set threshold, the timer set by the controller 8 starts to hold. At this time, the display module set by the controller 8 displays the current tension value of the tension sensor 71 and the countdown of the holding time; 6) If the operator observes that the tension value is stable during the holding time and there is no change in the tested plug, operating knob, and flexible cord, the tension test is considered to be passed. If the current tension value of the tension sensor 71 displayed by the display module decreases during the holding time, or even if the operating knob held by the three-jaw chuck 63 slips, or the plug / flexible cord falls off, the tested plug, operating knob, and flexible cord are considered to have failed the test.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that the above embodiments do not limit this utility model in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this utility model.

Claims

1. An electronically adjustable torsion load sensing device, characterized by, The structure mainly comprises a fixed support, a lifting support, an angle adjusting mechanism, a support stabilizing mechanism, a servo motor driving unit, a torsion measuring unit, a tension measuring unit and a controller, wherein the fixed support is used for bearing and fixing a detection device; the lifting support is installed on one side of the fixed support and is used for adjusting the working height of the detection device to adapt to equipment of different heights; the angle adjusting mechanism is arranged on a lead screw of the lifting support and is mechanically connected with the support stabilizing mechanism to realize angle adjustment of the support stabilizing mechanism; The support stabilizing mechanism is used for supporting and stabilizing the servo motor driving unit, the torsion measuring unit and the tension measuring unit; the servo motor driving unit mainly comprises a servo motor, a speed reducer, a shaft coupling and a driving lead screw, the output shaft of the servo motor is inserted into the speed reducer, the speed reducer is operated by a deformable clamp to tighten the locking screw on the speed reducer, and then the shaft coupling is connected with the driving lead screw to provide a rotating torsion for detection and is fixed on the support stabilizing unit; the torsion measuring unit and the tension measuring unit are respectively used for measuring the torsion value and the tension value; The controller is used for controlling the whole device and is electrically connected with the servo motor driving unit, the torsion measuring unit and the tension measuring unit.

2. An electronically adjustable torsion load sensing device according to claim 1, wherein, The lifting support is provided with a rocker and a lead screw, the lead screw is driven to move by the manual rocker to adapt to the height of the equipment to be detected; specifically, the lifting support drives the angle adjusting mechanism, the angle of the support stabilizing mechanism is changed by a rotating shaft of the angle adjusting mechanism, and the angle is locked by an angle adjusting knob to adapt to detection needs of multiple angles.

3. An electronically adjustable torsion load sensing device according to claim 1, wherein, The support stabilizing mechanism comprises a series of mechanical components for supporting and stabilizing and ensuring that the torsion transmitted to the driving lead screw by the shaft coupling can be smoothly output, mainly comprising a frame structure, a first stabilizing member, a second stabilizing member and a sliding block, the frame structure is used for mounting the servo motor driving unit and fixing the first stabilizing member and the second stabilizing member; the first stabilizing member is provided with a hole in the middle to ensure that the driving lead screw passes through; the second stabilizing member is provided with a bearing in the hole to connect with the driving lead screw, so that the driving lead screw can drive the torsion measuring unit to normally rotate; the sliding block is connected with the driving lead screw through a screw nut, when the torsion output by the servo motor through the speed reducer is transmitted to the driving lead screw through the shaft coupling, the sliding block can be driven to move forward and backward to convert the rotary motion into the linear motion of the sliding block; the first stabilizing member, the sliding block and the second stabilizing member are stably connected through a light rod, and the sliding block moves between the first stabilizing member and the second stabilizing member; further, the sliding block and the second stabilizing member are mechanically connected with a light rod above and are quickly connected with the tension measuring unit through a dovetail groove mechanism.

4. An electronically adjustable torsion load sensing device according to claim 1, wherein, The torsion measuring unit mainly comprises a three-jaw chuck, a quick clamping mechanism and a torsion sensor, the three-jaw chuck is used for clamping a measured soft wire, a plug and an operation knob, and is mechanically connected to one end of the quick clamping mechanism; the quick clamping mechanism is used for quickly clamping the torsion sensor, and the three-jaw chuck and a driving screw rod are quickly connected through a dovetail groove mechanism design at two ends; and the torsion sensor is used for measuring a torsion value of the driving screw rod.

5. An electronically adjustable torsional load detection device according to claim 1, wherein, The tension measuring unit mainly comprises a three-jaw chuck, a quick clamping mechanism and a tension sensor, the three-jaw chuck is used for clamping a measured soft wire, a plug and an operation knob, and is mechanically connected to one end of the quick clamping mechanism; the quick clamping mechanism is used for quickly clamping the tension sensor, and the three-jaw chuck and a sliding block and an optical rod provided above a second stabilizing piece are quickly connected through a dovetail groove mechanism design at two ends; and the tension sensor is used for measuring a tension value generated by the driving screw rod driving the sliding block to move linearly.

6. An electronically adjustable torsion load sensing device according to claim 1, wherein, The controller mainly comprises a data acquisition and processing module, a microprocessor module, a display output module and a power supply module, the data acquisition and processing module is used for collecting torsion values and tension values measured by the torsion measuring unit and the tension measuring unit and connecting input ports of the microprocessor module; the microprocessor module drives the servo motor and the speed reducer to work, and sets a test time through an internally provided timer; the display output module displays torsion and tension data collected by the microprocessor module; and the power supply module completes voltage conversion and is used for supplying power to the torsion measuring unit, the tension measuring unit, the servo motor, the speed reducer, the data acquisition and processing module, the microprocessor module and the display output module.

7. An electronically adjustable torsion load sensing device according to claim 1, wherein, The detection device further comprises a support frame mainly comprising a support rod, a lifting rod and a locking bolt, which are provided on the support stabilizing mechanism through a rotating shaft and a bolt, when tension is tested, the length of the lifting rod can be pulled out according to actual needs, the angle of the support frame is adjusted, and after the locking bolt is locked, the measured equipment is supported, so that the test error caused by the measured equipment being pulled and tilted due to external force during tension testing is prevented.

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