Calibration device of large torque sensor

Abstract

The utility model discloses a calibration device of a large torque sensor, a torque detection mechanism comprises a force application mechanism and a standard torque sensor, and the force application mechanism is used for applying torque to the standard torque sensor; the lever mechanism comprises a supporting column, a lever and pressurizing blades, the lever is rotatably installed on the supporting column, the pressurizing blades are arranged at the two ends of the lever respectively, and a standard torque sensor needing to be calibrated is in coaxial transmission connection with the lever through a coupler. The standard force sensor is connected with the jacking mechanism, the jacking mechanism can drive the standard force sensor to ascend and descend, and the standard force sensor is located under the pressurizing blade. According to the utility model, the standard torque sensor is calibrated and fixed, the standard torque sensor does not need to be dismounted from the original torque detection mechanism, the calibration is convenient and fast, the standard force sensor is adopted to accurately detect the lever force application value, a large number of weights do not need to be configured, the space is saved, and the calibration difficulty and cost are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of torque measurement device calibration, in particular to a calibration device for a large torque sensor. Background Art

[0002] The general torque measuring device uses a high-precision standard torque sensor to detect the torque sensor to be measured. In order to ensure the detection accuracy of the torque measuring device, the measurement accuracy of the standard torque sensor needs to be calibrated regularly. At present, the standard torque sensor is usually removed from the torque measuring device and calibrated on a weight-type torque standard machine. For large torque sensors of tens of thousands of N·m or hundreds of thousands of N·m, it is necessary to calibrate them on a large weight-type torque standard machine, which is time-consuming, labor-intensive, and has high calibration costs. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model aims to provide a calibration device for a large torque sensor.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A calibration device for a large torque sensor, comprising a torque detection mechanism, a lever mechanism, a lifting mechanism and a standard force sensor;

[0006] The torque detection mechanism includes a force-applying mechanism and a standard torque sensor, wherein the force-applying mechanism is used to apply torque to the standard torque sensor;

[0007] The lever mechanism comprises a support column, a lever and a pressure blade, the lever is rotatably mounted on the support column, both ends of the lever are provided with pressure blades, and the standard torque sensor to be calibrated is coaxially connected to the lever through a coupling;

[0008] The standard force sensor is connected to a lifting mechanism, and the lifting mechanism can drive the standard force sensor to move up and down. The standard force sensor is located directly below the pressurized blade.

[0009] Furthermore, the force-applying mechanism includes a support frame, a force-applying sleeve, a swing arm and a push-pull mechanism; the force-applying sleeve is rotatably mounted on the support frame through a bearing, and is fixedly sleeved on one end of the standard torque sensor; one end of the swing arm is coaxially and fixedly connected to the force-applying sleeve; one end of the push-pull mechanism is connected to the other end of the swing arm, and can push or pull the other end of the swing arm to swing around the axis of the force-applying sleeve.

[0010] Furthermore, the push-pull mechanism includes a worm gear transmission mechanism, a push-pull screw, a U-shaped hinge joint and a pin shaft; the worm gear transmission mechanism and the push-pull screw are transmission connected and can drive the push-pull screw to move linearly; one end of the push-pull screw is fixedly connected to the U-shaped hinge joint, and the U-shaped hinge joint is hinged to the other end of the swing arm through the pin shaft; the axis of the pin shaft intersects the axis of the push-pull screw perpendicularly.

[0011] Furthermore, the worm gear transmission mechanism includes a motor, a worm wheel and a worm, the worm wheel and the worm are meshingly driven, the worm is connected to the motor in driving connection, the inner circumference of the worm wheel has an internal thread matching the push-pull screw, and is threadedly connected to the push-pull screw through the internal thread.

[0012] Furthermore, an articulated mounting seat is fixedly installed on the support frame, the articulated mounting seat is hinged to the articulated shaft, and the worm gear transmission mechanism is installed on the articulated shaft; one end of the push-pull screw rod passes through the articulated shaft and is connected to the U-shaped articulated head; the rotation axis of the articulated shaft intersects perpendicularly with the axis of the push-pull screw rod.

[0013] Furthermore, one end of the swing arm is provided with a through hole and is coaxially sleeved on the force-applying sleeve through the through hole.

[0014] Furthermore, the lever mechanism also includes a horizontality detection device for detecting the horizontality of the lever.

[0015] Furthermore, the swing arm is in a teardrop shape, and the end with a larger diameter is coaxially connected to the force-applying sleeve.

[0016] The beneficial effects of the utility model are: the standard torque sensor can be calibrated and confirmed by using the utility model, and the standard torque sensor does not need to be disassembled from the original torque detection mechanism, so the verification is convenient and quick; and the standard force sensor is used to accurately detect the lever force value, without the need to configure a large number of weights, thus saving space and reducing the verification difficulty and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the calibration device in the embodiment of the utility model;

[0018] Figure 2 This is a front view of the calibration device in the embodiment of the utility model;

[0019] Figure 3 This is a structural schematic diagram of a force-applying mechanism in an embodiment of the utility model;

[0020] Figure 4 It is a partial structural schematic diagram of the force-applying mechanism in the embodiment of the utility model;

[0021] Figure 5It is a cross-sectional view of the force applying mechanism in the embodiment of the utility model.

[0022] in:

[0023] 10-force-applying mechanism; 11-support frame; 12-force-applying sleeve; 13-swing arm; 14-push-pull mechanism; 141-push-pull screw rod; 151-U-shaped hinge joint; 152-pin shaft; 161-hinge mounting seat; 162-hinge shaft; 20-standard torque sensor; 30-coupling; 40-lever mechanism; 41-support column; 42-lever; 43-pressure blade; 50-lifting mechanism; 51-standard force sensor. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings. It should be noted that this embodiment is based on the technical solution and provides a detailed implementation method and a specific operation process, but the protection scope of the present invention is not limited to this embodiment.

[0025] This embodiment provides a calibration device for a large torque sensor, such as Figure 1-5 As shown, it includes a torque detection mechanism, a lever mechanism 40, a lifting mechanism 50 and a standard force sensor 51;

[0026] The torque detection mechanism includes a force applying mechanism 10 and a standard torque sensor 20, wherein the force applying mechanism 10 is used to apply torque to the standard torque sensor 20;

[0027] The lever mechanism 40 includes a support column 41, a lever 42 and a pressure blade 43. The lever 42 is rotatably mounted on the support column 41. Both ends of the lever 42 are provided with pressure blades 43. The standard torque sensor 20 to be calibrated is coaxially connected to the lever 42 through a coupling 30.

[0028] The standard force sensor 51 is connected to the lifting mechanism 50 , and the lifting mechanism 50 can drive the standard force sensor 51 to move up and down. The standard force sensor 51 is located directly below the pressurizing blade 43 .

[0029] When the standard torque sensor 20 with large torque needs to be calibrated, the standard torque sensor 20 of the torque detection mechanism only needs to be directly connected to the lever 42 through the coupling 30, and then the lifting mechanism 50 and the standard force sensor 51 are moved to the bottom of the pressure blade 43 at the corresponding end of the lever according to the direction of the measured torque, and the standard force sensor 51 is driven up and down by the lifting mechanism 50 until the lever 42 is adjusted to a horizontal state. After the torque is applied to the standard torque sensor 20 by the force-applying mechanism 10, the lever 42 rotates together with the standard torque sensor 20, and the pressure blade 43 applies pressure to the standard force sensor 51 directly below. The product of the standard force value detected by the standard force sensor 51 and the lever 42 force arm is the detected standard torque value. The standard torque value is compared and calibrated with the indication of the standard torque sensor 20 to complete the calibration of the standard torque sensor 20. By utilizing the calibration device of this embodiment, the standard torque sensor 20 does not need to be disassembled from the original torque detection mechanism, and the calibration is convenient and quick. In addition, a high-precision standard force sensor 51 is used to accurately detect the lever force value, without the need for a large number of weights, thus saving space and reducing the difficulty and cost of calibration.

[0030] In this embodiment, the lever mechanism 40 further includes a levelness detection device for detecting the levelness of the lever 42 , so as to facilitate accurate adjustment of the levelness of the lever 42 .

[0031] It should be noted that the specific structure of the lifting mechanism 50 is not limited and can be obtained from the prior art, such as a screw lift.

[0032] like Figure 3-5 As shown, the force-applying mechanism 10 includes a support frame 11, a force-applying sleeve 12, a swing arm 13 and a push-pull mechanism 14; the force-applying sleeve 12 is rotatably mounted on the support frame 11 through a bearing, and is fixedly sleeved on one end of the standard torque sensor 20; one end of the swing arm 13 is coaxially and fixedly connected to the force-applying sleeve 12; one end of the push-pull mechanism 14 is connected to the other end of the swing arm 13, and can push or pull the other end of the swing arm 13 to swing around the axis of the force-applying sleeve 12.

[0033] When torque needs to be applied to the standard torque sensor 20 , the push-pull mechanism 14 pushes or pulls the other end of the swing arm 13 to swing around the axis of the force sleeve 12 , thereby driving one end of the swing arm 13 to rotate axially together with the force sleeve 12 , and the force sleeve 12 applies torque to the standard torque sensor 20 .

[0034] Furthermore, in this embodiment, the push-pull mechanism 14 includes a worm gear transmission mechanism, a push-pull screw rod 141, a U-shaped hinge joint 151 and a pin shaft 152; the worm gear transmission mechanism and the push-pull screw rod 141 are transmission connected and can drive the push-pull screw rod 141 to move linearly; one end of the push-pull screw rod 141 is fixedly connected to the U-shaped hinge joint 151, and the U-shaped hinge joint 151 is hinged to the other end of the swing arm 13 through the pin shaft 152; the axis of the pin shaft 152 intersects perpendicularly with the axis of the push-pull screw rod 141.

[0035] Specifically, the worm gear transmission mechanism may include a motor, a worm wheel and a worm, the worm wheel and the worm are meshingly driven, the worm is connected to the motor in a driving manner, the inner circumference of the worm wheel has an internal thread matching the push-pull screw 141, and is threadedly connected to the push-pull screw 141 through the internal thread.

[0036] In this embodiment, a worm gear transmission mechanism is used to drag the swing arm to generate a static small angle large torque around the axis of the force-applying sleeve. The structure is simple and the cost is low. The worm gear has a unique self-locking function, which ensures the safety and stability of the force-applying mechanism and the stable output of large torque. The above structure can ensure that the worm gear push-pull mechanism applies a tangential force to the swing arm, ensuring the stable output of large torque.

[0037] Furthermore, in this embodiment, an articulated mounting seat 161 is fixedly installed on the support frame 11, the articulated mounting seat 161 is hinged to the articulated shaft 162, the worm gear transmission mechanism is installed on the articulated shaft 162, one end of the push-pull screw rod 141 passes through the articulated shaft 162 and is connected to the U-shaped articulated head 151; the rotation axis of the articulated shaft 162 intersects perpendicularly with the axis of the push-pull screw rod 141.

[0038] In this embodiment, one end of the swing arm 13 is provided with a through hole and is coaxially sleeved on the force sleeve 12 through the through hole. The swing arm is sleeved on the force sleeve and is circumferentially fixed and transmits torque through a key, which can improve the installation stability of the swing arm and the force sleeve.

[0039] In this embodiment, the swing arm 13 is in a teardrop shape, and the end with a larger diameter is coaxially connected to the force-applying sleeve 12 .

[0040] For those skilled in the art, various corresponding changes and modifications can be made according to the above technical solutions and concepts, and all of these changes and modifications should be included in the protection scope of the claims of the utility model.

Claims

1. A calibration device for a large torque sensor, characterized in that: It comprises a torque detection mechanism, a lever mechanism (40), a lifting mechanism (50) and a standard force sensor (51); The torque detection mechanism comprises a force applying mechanism (10) and a standard torque sensor (20), wherein the force applying mechanism (10) is used to apply torque to the standard torque sensor (20); The lever mechanism (40) comprises a support column (41), a lever (42) and a pressure blade (43); the lever (42) is rotatably mounted on the support column (41); both ends of the lever (42) are respectively provided with a pressure blade (43); a standard torque sensor (20) to be calibrated is coaxially connected to the lever (42) via a coupling (30); The standard force sensor (51) is connected to a lifting mechanism (50), and the lifting mechanism (50) can drive the standard force sensor (51) to move up and down. The standard force sensor (51) is located directly below the pressure blade (43).

2. The calibration device for a large torque sensor according to claim 1, characterized in that: The force-applying mechanism (10) comprises a support frame (11), a force-applying sleeve (12), a swing arm (13) and a push-pull mechanism (14); the force-applying sleeve (12) is rotatably mounted on the support frame (11) via a bearing, and is fixedly sleeved on one end of the standard torque sensor (20); one end of the swing arm (13) is coaxially fixedly connected to the force-applying sleeve (12); one end of the push-pull mechanism (14) is connected to the other end of the swing arm (13), and can push or pull the other end of the swing arm (13) to swing around the axis of the force-applying sleeve (12).

3. The calibration device for a large torque sensor according to claim 2, characterized in that: The push-pull mechanism (14) comprises a worm gear transmission mechanism, a push-pull screw rod (141), a U-shaped hinge joint (151) and a pin shaft (152); the worm gear transmission mechanism and the push-pull screw rod (141) are transmission-connected and can drive the push-pull screw rod (141) to move linearly; one end of the push-pull screw rod (141) is fixedly connected to the U-shaped hinge joint (151), and the U-shaped hinge joint (151) is hinged to the other end of the swing arm (13) via the pin shaft (152); the axis of the pin shaft (152) intersects perpendicularly with the axis of the push-pull screw rod (141).

4. The calibration device for a large torque sensor according to claim 3, characterized in that: The worm gear transmission mechanism comprises a motor, a worm wheel and a worm, the worm wheel and the worm are meshed for transmission, the worm is connected to the motor for transmission, the inner circumference of the worm wheel has an internal thread matching the push-pull screw rod (141), and is threadedly connected to the push-pull screw rod (141) through the internal thread.

5. The calibration device for a large torque sensor according to claim 3, characterized in that: An articulated mounting seat (161) is fixedly mounted on the support frame (11), the articulated mounting seat (161) is articulated to a hinge shaft (162), and a worm gear transmission mechanism is mounted on the hinge shaft (162); one end of the push-pull screw rod (141) passes through the hinge shaft (162) and is connected to the U-shaped hinge joint (151); the rotation axis of the hinge shaft (162) intersects perpendicularly with the axis of the push-pull screw rod (141).

6. The calibration device for a large torque sensor according to claim 2, characterized in that: One end of the swing arm (13) is provided with a through hole and is coaxially sleeved on the force-applying shaft sleeve (12) through the through hole.

7. The calibration device for a large torque sensor according to claim 1, characterized in that: The lever mechanism (40) also includes a levelness detection device for detecting the levelness of the lever (42).

8. The calibration device for a large torque sensor according to claim 2, characterized in that: The swing arm (13) is in the shape of a water drop, and the end with a larger diameter is coaxially connected to the force-applying shaft sleeve (12).

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