Full-automatic torque amplifier calibration device

Abstract

A full-automatic torque amplifier calibration device comprises a frame-shaped support, a servo motor, a speed reducer, an input torque sensor, an output torque sensor and a duplex lead screw lifting mechanism. The upper part of the frame-shaped bracket is a test platform, the bottom of the frame-shaped bracket is provided with a base part of a double-lead-screw lifting mechanism, two lead screws of the double-lead-screw lifting mechanism penetrate through the test platform, the upper parts of the two lead screws are connected with a lifting plate, and the lifting plate is fixedly connected with a speed reducer; the servo motor is connected with the speed reducer; the output end of the speed reducer is in threaded connection with the input torque sensor; the lower part of the input torque sensor is connected with a tested torque amplifier, and the lower part of the tested torque amplifier passes through the test platform and is connected with an output torque sensor through a torque adapter. During calibration, a coaxial output torque sensor and a non-coaxial output torque sensor are selectively installed according to the type of the tested torque amplifier. According to the utility model, coaxial and non-coaxial torque amplifiers can be calibrated.

Description

Technical Field

[0001] This utility model belongs to the technical field of torque amplifier calibration, specifically referring to a fully automatic torque amplifier calibration device. Background Technology

[0002] Torque amplifiers (also known as torque multipliers) are widely used and play a crucial role in fields such as wind power, nuclear power, heavy machinery, and industrial assembly. Torque amplifiers typically amplify torque through gear transmission. They are devices that increase torque, offering advantages such as labor-saving operation and ease of use, and are widely used in applications requiring high torque loading. By inputting a certain torque, the output ratio can be several to hundreds of times after amplification by the gear set, resulting in an output torque of tens of thousands of Nm.

[0003] In the past, due to the lack of dedicated torque amplifier calibration fixtures, calibration work was usually performed manually by metrology personnel. During calibration, after the torque amplifier was installed on the torque measuring instrument, the metrology personnel would operate a standard torque wrench to input torque to the torque amplifier. However, due to varying skill levels among operators, the angle of the standard torque wrench might be too high or too low, resulting in a certain deviation in the input torque value and thus causing an error in the output torque value.

[0004] Chinese utility model patent CN216284096U discloses a torque multiplier calibration device, including a torque measuring instrument, a support assembly, a testing mechanism, and a connector. The torque measuring instrument is used to measure the amplified torque of the torque multiplier, the support assembly is used to support the testing mechanism, and the testing mechanism is used to drive the connector to apply torque to the input end of the torque multiplier. This scheme uses a mechanical coordination method, which can smoothly and evenly apply torque to the torque multiplier, reduce the influence of errors, and improve the accuracy of calibration results. However, it has the following disadvantages: 1. The input torque part is driven by the connector through the testing mechanism to input torque to the torque amplifier. The testing mechanism includes a slide table, a test screw, an extension bracket, etc., with many mechanical connectors, a complex input torque loading method, and the use of a long lever arm to load torque, resulting in large system errors and poor repeatability of the loaded torque, affecting the test accuracy. 2. It can only detect some coaxial torque amplifiers. For coaxial torque amplifiers, the horizontal position of the reaction arm off the axis varies for different models of amplifiers, and the device does not have a reaction arm adjustment mechanism. In addition, the device cannot measure non-coaxial torque amplifiers. Non-coaxial torque amplifiers have input torque axes that do not coincide with output torque axes, and this literature does not mention a measurement method for this type of amplifier. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a fully automatic torque amplifier calibration device with high testing accuracy, which can calibrate both coaxial and non-coaxial torque amplifiers.

[0006] This utility model is implemented as follows:

[0007] A fully automatic torque amplifier calibration device includes: a frame bracket, a servo motor, a reducer, an input torque sensor, an output torque sensor, and a double-screw lifting mechanism;

[0008] The upper part of the frame bracket is a test platform, and the base part of the double screw lifting mechanism is installed at the bottom. The two screws of the double screw lifting mechanism pass through the test platform, and the upper part of the two screws is connected to a lifting plate. The lifting plate is fixedly connected to the reducer.

[0009] The servo motor is connected to the reducer, and the output end of the reducer is threadedly connected to the input torque sensor;

[0010] The input torque sensor is connected to the measured torque amplifier below, and the measured torque amplifier passes through the test platform and is connected to the output torque sensor via a torque adapter below.

[0011] A bearing is installed at the position where the torque amplifier under test passes through the test platform;

[0012] The output torque sensor is mounted on a U-shaped bracket, and the top of the U-shaped bracket is fixedly connected to the lower surface of the test platform.

[0013] The output torque sensor includes: a coaxial output torque sensor and a non-coaxial output torque sensor;

[0014] The U-shaped mounting frame has two mounting positions, which are respectively used to mount the coaxial output torque sensor and the non-coaxial output torque sensor.

[0015] During calibration, the coaxial output torque sensor and the non-coaxial output torque sensor are selectively installed according to the type of the torque amplifier being measured.

[0016] The test platform has slide rails on both sides of the torque amplifier under test, which are used to install the reaction mechanism.

[0017] Furthermore, the bearing is a deep groove ball bearing.

[0018] Furthermore, the reaction mechanism includes: a slider and two reaction force blocking arms vertically mounted on the slider; the slider slides within the slide rail and is locked at the desired position.

[0019] Furthermore, the U-shaped fixing frame has a T-shaped slide groove, a sliding plate is installed on the T-shaped slide groove, and the non-coaxial output torque sensor is installed on the sliding plate for adjusting the position of the non-coaxial output torque sensor with different eccentricities.

[0020] Furthermore, the slide plate is provided with square holes for mounting a square-headed output torque sensor.

[0021] The advantages of this utility model are:

[0022] 1. The torque amplifier is directly loaded with torque through a high-precision torque sensor, and the torque value is precisely controlled by a servo motor and reducer, resulting in stable and high-precision loading.

[0023] 2. The output torque section is designed with both coaxial and non-coaxial output torque sensors, which can calibrate both coaxial and non-coaxial torque amplifiers.

[0024] 3. A reaction mechanism is designed on the test platform plate to meet the reaction force requirements of various torque amplifiers at different heights and horizontal positions. Attached Figure Description

[0025] The present invention will now be further described with reference to the accompanying drawings and embodiments.

[0026] Figure 1 This is a schematic diagram of the structure of this utility model.

[0027] Figure 2 This is a schematic diagram of the test platform and reaction mechanism in this utility model.

[0028] Figure 3 This is a schematic diagram of the usage state of the coaxial torque amplifier of this utility model.

[0029] Figure 4 This is a schematic diagram of the usage state of the non-coaxial torque amplifier of this utility model.

[0030] Figure 5 This is a schematic diagram showing the positional relationship between a U-shaped fixed frame and a torque sensor in this utility model. Detailed Implementation

[0031] like Figure 1 and Figure 2 As shown, a fully automatic torque amplifier calibration device includes: a frame bracket 7, a servo motor 1, a reducer 2, an input torque sensor 3, an output torque sensor, and a double-screw lifting mechanism 9.

[0032] The upper part of the frame bracket 7 is the test platform 71, and the base part 91 of the double screw lifting mechanism 9 is installed at the bottom. The two screws 92 of the double screw lifting mechanism 9 pass through the test platform 71, and the upper part of the two screws 92 is connected to a lifting plate 93. The lifting plate 93 is fixedly connected to the reducer 2.

[0033] Servo motor 1 is connected to reducer 2, and the output end of reducer 2 is threadedly connected to input torque sensor 3; the lower part of input torque sensor 3 is connected to the measured torque amplifier, and the lower part of the measured torque amplifier passes through test platform 71 and is connected to output torque sensor 8 through torque adapter (not shown).

[0034] A bearing 12 (a deep groove ball bearing) is installed at the position where the torque amplifier under test passes through the test platform 71, and the torque adapter is located in the bearing 12;

[0035] The output torque sensor 8 is mounted on a U-shaped bracket 13, and the top of the U-shaped bracket 13 is fixedly connected to the lower surface of the test platform 71.

[0036] The output torque sensor includes: a coaxial output torque sensor 81 and a non-coaxial output torque sensor 82;

[0037] The U-shaped fixed frame 13 has two mounting positions, which are used to mount the coaxial output torque sensor 81 and the non-coaxial output torque sensor 82, respectively.

[0038] During calibration, a coaxial output torque sensor 81 (e.g., depending on the type of torque amplifier being measured) is selectively installed. Figure 3 (as shown) and non-coaxial output torque sensor 82 (e.g. Figure 4 (as shown);

[0039] The test platform 71 has slide rails 72 on both sides of the torque amplifier under test, and the slide rails 72 are used to install the reaction mechanism 5.

[0040] The reaction mechanism 5 includes: a slider 51 and two reaction force blocking arms 52 vertically mounted on the slider 51; the slider 51 is mounted in the slide rail 72 and slides, and is locked at the desired position.

[0041] like Figure 5 As shown, the U-shaped fixing frame 13 has a T-shaped slide groove 14, a slide plate 15 is installed on the T-shaped slide groove 14, and a non-coaxial output torque sensor 82 is installed on the slide plate 15 to adjust the position of the non-coaxial output torque sensor 82 with different eccentricities.

[0042] Square holes can also be provided on the slide plate 15 for mounting square-head torque sensors.

[0043] This utility model device takes into account that coaxial torque amplifiers account for more than 95% of various torque laboratories. Therefore, the design and assembly first ensure the coaxiality of the input end and the coaxial output end. The motor reducer and input torque sensor at the input end can only move up and down. This differs from some devices on the market where the input end can move horizontally, affecting the coaxial detection accuracy.

[0044] Operation of the coaxial torque amplifier: Connect the input and output terminals of the coaxial torque amplifier 101 coaxially to the input torque sensor 3 and the output torque sensor 81, respectively. Ensure the appropriate torque adapter is selected to guarantee the correct height of the torque amplifier's reaction arm. Adjust the position of the reaction arm on the test platform 71 using the double-rail T-slot slide rail, and then tighten the T-nut. Set the loading torque in the system software, and use a servo motor closed-loop drive and high-precision deceleration output to achieve automatic torque loading. During the input torque sensor loading, the torque amplifier's reaction arm acts horizontally on the device's reaction arm. The torque amplifier's output terminal amplifies the torque and inputs it to the device's output torque sensor. The system software automatically reads the torque measurement value from the output torque sensor and calculates the torque amplification ratio.

[0045] Operation of the non-coaxial torque amplifier: Connect the input end of the non-coaxial torque amplifier 102 coaxially with the input torque sensor 3. Select a suitable torque adapter and adjust the eccentricity of the slide plate 15 to ensure a tight connection between the output end of the non-coaxial torque amplifier 102, the torque adapter, and the non-coaxial output torque sensor 82. Tighten the bolts on the slide plate 15. Adjust the position of the reaction force arm 52 on the large plate of the test platform 71 using the double-rail T-slot slide rail, and then tighten the T-nut. Set the loading torque in the system software, and use a servo motor closed-loop drive and high-precision deceleration output to achieve automatic torque loading. During the loading torque from the input torque sensor, the reaction force arm of the torque amplifier acts horizontally on the reaction force arm 52 of the device. The output end of the non-coaxial torque amplifier 102 inputs the amplified torque to the output torque sensor 82 of the device. The system software automatically reads the torque measurement value of the output torque sensor and calculates the torque amplification ratio.

[0046] This invention directly applies torque to the torque amplifier using a high-precision torque sensor, and precisely controls the torque value through a servo motor and reducer, resulting in stable and highly accurate loading. The output torque section incorporates both coaxial and non-coaxial output torque sensors, allowing for the calibration of both types of torque amplifiers. A reaction mechanism is designed on the test platform to meet the reaction force requirements of various torque amplifiers at different heights and horizontal positions.

[0047] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A fully automatic torque amplifier calibration device, characterized in that: include: Frame bracket, servo motor, reducer, input torque sensor, output torque sensor, double-screw lifting mechanism; The upper part of the frame bracket is a test platform, and the base part of the double screw lifting mechanism is installed at the bottom. The two screws of the double screw lifting mechanism pass through the test platform, and the upper part of the two screws is connected to a lifting plate. The lifting plate is fixedly connected to the reducer. The servo motor is connected to the reducer, and the output end of the reducer is threadedly connected to the input torque sensor; The input torque sensor is connected to the measured torque amplifier below, and the measured torque amplifier passes through the test platform and is connected to the output torque sensor via a torque adapter below. A bearing is installed at the position where the torque amplifier under test passes through the test platform; The output torque sensor is mounted on a U-shaped bracket, and the top of the U-shaped bracket is fixedly connected to the lower surface of the test platform. The output torque sensor includes: a coaxial output torque sensor and a non-coaxial output torque sensor; The U-shaped mounting frame has two mounting positions, which are respectively used to mount the coaxial output torque sensor and the non-coaxial output torque sensor. During calibration, the coaxial output torque sensor and the non-coaxial output torque sensor are selectively installed according to the type of the torque amplifier being measured. The test platform has slide rails on both sides of the torque amplifier under test, which are used to install the reaction mechanism.

2. The fully automatic torque amplifier calibration device as described in claim 1, characterized in that: The bearing in question is a deep groove ball bearing.

3. The fully automatic torque amplifier calibration device as described in claim 1, characterized in that: The reaction mechanism includes: a slider and two reaction force blocking arms vertically mounted on the slider; the slider slides within the slide rail and is locked at the desired position.

4. The fully automatic torque amplifier calibration device as described in claim 1, characterized in that: The U-shaped fixing frame has a T-shaped slide groove, on which a sliding plate is installed. The non-coaxial output torque sensor is installed on the sliding plate and is used to adjust the position of the non-coaxial output torque sensor with different eccentricities.

5. The fully automatic torque amplifier calibration device as described in claim 4, characterized in that: The slide plate has square holes for mounting a square-headed output torque sensor.

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