Calibration mechanism for wide-range torquemeter

Abstract

The utility model discloses a calibration mechanism for a wide-range torquemeter, which comprises a calibration arm connected with the torquemeter and used for transmitting and applying torque; the gradienter is arranged on the calibration arm and used for monitoring whether the calibration arm is in a horizontal state or not; the speed reducer is connected with the calibration arm through a force sensor, and the speed reducer provides power for vertical linear motion; one end of the first rotating connecting rod is movably connected with an output shaft of the speed reducer, and the other end of the first rotating connecting rod is connected with one end of the force sensor; one end of the second rotating connecting rod is connected with the other end of the force sensor, and the other end of the second rotating connecting rod is movably connected with one end of the calibration arm; through the above mode, the calibration error can be reduced, the operation difficulty in the calibration process can be reduced, the use of weights can be avoided, the calibration efficiency can be improved, and the calibration device can be suitable for the calibration of a wide-range torquemeter.

Description

Technical Field

[0001] This utility model relates to the field of torque meter calibration technology, and in particular to a calibration mechanism for a large-range torque meter. Background Technology

[0002] In the field of torque meter calibration, the traditional method involves using mass weights. The principle is to use weights of known mass, employing levers or other mechanical structures, to convert gravity into a torque acting on the torque meter, thus achieving the calibration purpose. In practice, a suitable combination of weights must be selected based on the torque meter's range and accuracy requirements, and precise mechanical assembly and adjustment are necessary to ensure that the torque generated by the weights acts accurately on the measuring part of the torque meter. In the past, this method was widely used in scenarios where accuracy requirements were not particularly high and the torque meter's calibration range was relatively small, demonstrating a certain degree of practicality and economy.

[0003] However, this method has the following drawbacks:

[0004] First, the calibration process using mass weights is complex. Each calibration requires manual handling and installation of the weights, which is labor-intensive and inefficient.

[0005] Second, the accuracy of weight calibration is constrained by many factors, such as the mass accuracy of the weight itself, the mechanical wear and deformation of the lever mechanism, and human error during operation. These factors can all lead to inaccurate and unstable calibration results, making it difficult to meet the requirements of modern industry for high-precision torque measurement.

[0006] Furthermore, for the calibration of large-range torque meters, if mass weights are used for calibration, the required mass of the weights is extremely large. Considering that most equipment is designed according to ergonomics, the height of the equipment center is generally between 750mm and 1000mm. Under such limited placement height, the outer diameter of the mass weights needs to be extremely large, which will bring high processing and manufacturing costs and heavy manual handling burden, greatly limiting its application range. Utility Model Content

[0007] The main technical problem solved by this utility model is to provide a calibration mechanism for a large-range torque meter, which can reduce calibration errors, reduce the operational difficulty in the calibration process, and avoid the use of weights, thereby improving calibration efficiency and being applicable to the calibration of large-range torque meters.

[0008] To solve the above-mentioned technical problems, the present invention provides a calibration mechanism for a large-range torque meter, comprising: a calibration arm connected to the torque meter, the calibration arm being used to transmit and apply torque; a level mounted on the calibration arm, the level being used to monitor whether the calibration arm is in a horizontal state; a reducer connected to the calibration arm via a force sensor, the reducer providing power for vertical linear motion; a first rotating link, one end of the first rotating link being movably connected to the output shaft of the reducer, and the other end of the first rotating link being connected to one end of the force sensor; and a second rotating link, one end of the second rotating link being connected to the other end of the force sensor, and the other end of the second rotating link being movably connected to one end of the calibration arm.

[0009] Preferably, the calibration arm has a symmetrical structure, with the middle of the calibration arm connected to the rotor of the torque meter, and balance rings at both ends of the calibration arm for adjusting the balance of the calibration arm.

[0010] Preferably, the calibration arm is provided with lifting rings on both sides.

[0011] Preferably, the reducer is connected to a base plate, the reducer is mounted on the base plate, and a handwheel is also provided on the base plate. The handwheel is connected to the reducer and is used to drive the vertical linear motion of the reducer output shaft.

[0012] Preferably, a first Y-shaped connector is connected to the output shaft of the reducer, and the end of the first rotating connecting rod near the first Y-shaped connector is rotatably connected to the first Y-shaped connector via a rotating shaft.

[0013] Preferably, the second rotating link is connected to a second Y-shaped connector at one end near the calibration arm, and the calibration arm is provided with a shaft hole at one end near the second Y-shaped connector. The calibration arm is rotatably connected to the second Y-shaped connector by passing through the second Y-shaped connector and the shaft hole via a rotating shaft.

[0014] Preferably, the calibration arm has multiple connection holes in the middle, and connection bolts are threaded into the connection holes. The calibration arm is connected to the rotor of the torque meter through the connection bolts.

[0015] Preferably, the force sensor is a strain gauge force sensor.

[0016] The beneficial effects of this invention are as follows: the high precision and fast response characteristics of the force sensor significantly improve calibration accuracy, reduce error sources, and ensure the accuracy and reliability of torque meter measurement data. Its operation is simple, eliminating the need for heavy manual handling of weights, reducing labor intensity, improving calibration efficiency, and enabling rapid batch calibration. From a cost perspective, it reduces reliance on large, high-precision weights, saving on manufacturing and maintenance costs, resulting in high economic benefits and practical value, and bringing new breakthroughs and advancements to torque meter calibration technology. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention when assembled with a torque meter;

[0018] Figure 2 This is a schematic diagram of the main view structure of this utility model when assembled with a torque meter;

[0019] Figure 3 This is a top view of the present invention;

[0020] Figure 4 This is a schematic diagram showing the connection relationship between the speed reducer of this utility model and the first rotating connecting rod, the second rotating connecting rod, and the force sensor.

[0021] The components in the attached diagram are labeled as follows:

[0022] 1. Torque meter; 11. Mounting bracket;

[0023] 2. Calibration arm; 21. Balance ring; 22. Lifting ring; 23. Connecting bolts;

[0024] 3. Level;

[0025] 4. Reducer; 41. First Y-joint;

[0026] 5. Force sensor;

[0027] 6. First rotating connecting rod;

[0028] 7. Second rotating connecting rod; 71. Second Y-shaped joint;

[0029] 8. Base plate;

[0030] 9. Handwheel. Detailed Implementation

[0031] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0037] Unless otherwise specified, physical quantities in formulas should be understood as basic quantities of SI base units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.

[0038] Example:

[0039] refer to Figures 1-4 A calibration mechanism for a large-range torque meter includes: a calibration arm 2 connected to the rotor of the torque meter 1, the calibration arm 2 having a vertical axisymmetric structure and serving as the main force-bearing component for transmitting and applying torque; a level 3 mounted on the calibration arm 2, used to monitor whether the calibration arm 2 is horizontal to ensure measurement accuracy; a reducer 4 connected to the calibration arm 2 via a force sensor 5, the reducer 4 providing power and its output shaft performing vertical linear motion, the force sensor 5 being a strain gauge type force sensor; a first rotating link 6, one end of which is movably connected to the output shaft of the reducer 4, and the other end of which is connected to one end of the force sensor 5; and a second rotating link 7, one end of which is connected to the other end of the force sensor 5, and the other end of which is movably connected to one end of the calibration arm 2. The reducer 4 is connected to a base plate 8, and the reducer 4 is bolted to the base plate 8. A handwheel 9 is also installed on the base plate 8, and the handwheel 9 is connected to the reducer 4. The handwheel 9 is used to drive the vertical linear motion of the reducer output shaft. In order to achieve the vertical linear motion of the reducer output shaft, a worm gear or other existing technologies that can convert rotary motion into linear motion can be used, which will not be elaborated here.

[0040] refer to Figure 1 and Figure 3 When calibration is required, the rotor of torque meter 1 is in a restricted state to prevent the rotor of torque meter 1 from rotating, and it is checked whether torque meter 1 has been firmly installed on the equipment to be calibrated by the mounting bracket 11 to ensure that torque meter 1 has sufficient connection strength to prevent deviation during calibration.

[0041] Then, the operator turns the handwheel 9 to drive the reducer 4. The reducer 4 decelerates and increases power. The output shaft of the reducer 4 retracts and moves downward, transmitting the force to the calibration arm 2. After the calibration arm 2 is subjected to force, it transmits the force to the force sensor 5 through the first rotating link 6 and the second rotating link 7. The force sensor 5 measures the magnitude of the force in real time and converts it into an electrical signal. Based on the force value measured by the force sensor 5 and the lever arm length of the calibration arm 2, the real-time applied torque value is calculated. The calculated torque value is compared with the torque value measured by the torque meter 1. If there is a deviation between the two, the torque meter 1 is adjusted until the torque value measured by the torque meter 1 matches the actual applied torque value.

[0042] refer to Figure 1 and Figure 2 To better stabilize the balance of calibration arm 2, the middle of calibration arm 2 is connected to the rotor of torque meter 1. Multiple connection holes are provided in the middle of calibration arm 2, with threaded connecting bolts 23 fitted into these holes. Calibration arm 2 is connected to the rotor of torque meter 1 via these bolts. To further facilitate adjustment of the balance of calibration arm 2, balance rings 21 are installed at both ends of calibration arm 2 for adjusting its balance. This dynamically adjusts the center of gravity distribution of calibration arm 2, ensuring it remains horizontal under load and preventing tilting due to its own weight or uneven application of external forces. Furthermore, these rings compensate for assembly errors, eliminating asymmetrical torques caused by machining errors or assembly deviations, thus ensuring the straightness of the torque transmission path and reducing measurement errors.

[0043] refer to Figures 1-4 A first Y-shaped connector 41 is connected to the output shaft of the reducer 4. The end of the first rotating connecting rod 6 near the first Y-shaped connector 41 is rotatably connected to the first Y-shaped connector 41 via a rotating shaft. The end of the second rotating connecting rod 7 near the calibration arm 2 is connected to a second Y-shaped connector 71. A shaft hole is provided at the end of the calibration arm 2 near the second Y-shaped connector 71. The calibration arm 2 is rotatably connected to the second Y-shaped connector 71 via a rotating shaft passing through the second Y-shaped connector 71 and the shaft hole. This optimizes the torque transmission path. The Y-shaped connector decomposes the unidirectional tensile or compressive force into a symmetrically distributed force, reducing the bending effect of the lateral component force on the rotating connecting rod and ensuring that the torque is accurately transmitted along the axis to the high-precision force sensor 5. It also prevents jamming; the flexibility of the rotating connection avoids mechanical jamming caused by slight tilting or vibration of the calibration arm 2, ensuring the continuity and stability of the calibration process.

[0044] refer to Figure 1 and Figure 2 The calibration arm 2 is equipped with lifting rings 22 on both sides, which facilitates the movement of the calibration arm 2 by means of a lifting device, thus saving manpower.

[0045] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A calibration mechanism for a large-range torque meter, characterized in that, include: A calibration arm (2) is connected to a torque meter (1) and is used to transmit and apply torque. A level (3) is mounted on a calibration arm (2) and is used to monitor whether the calibration arm (2) is in a horizontal state. A speed reducer (4) is connected to the calibration arm (2) via a force sensor (5), and the speed reducer (4) provides power for vertical linear motion; The first rotating link (6) has one end movably connected to the output shaft of the reducer (4) and the other end connected to one end of the force sensor (5). The second rotating link (7) has one end connected to the other end of the force sensor (5) and the other end movably connected to one end of the calibration arm (2).

2. The calibration mechanism for a large-range torque meter according to claim 1, characterized in that: The calibration arm (2) has a symmetrical structure. The middle of the calibration arm (2) is connected to the rotor of the torque meter (1). The two ends of the calibration arm (2) are provided with balance rings (21) for adjusting the balance state of the calibration arm (2).

3. A calibration mechanism for a large-range torque meter according to claim 1, characterized in that: The calibration arm (2) is provided with lifting rings (22) on both sides.

4. A calibration mechanism for a large-range torque meter according to claim 1, characterized in that: The reducer (4) is connected to a base plate (8). The reducer (4) is mounted on the base plate (8). A handwheel (9) is also mounted on the base plate (8). The handwheel (9) is connected to the reducer (4) and is used to drive the vertical linear motion of the reducer output shaft.

5. A calibration mechanism for a large-range torque meter according to claim 4, characterized in that: The output shaft of the reducer (4) is connected to a first Y-shaped connector (41), and the end of the first rotating connecting rod (6) near the first Y-shaped connector (41) is rotatably connected to the first Y-shaped connector (41) through a rotating shaft.

6. A calibration mechanism for a large-range torque meter according to claim 5, characterized in that: The second rotating link (7) is connected to a second Y-shaped connector (71) at one end near the calibration arm (2). The calibration arm (2) has a shaft hole at one end near the second Y-shaped connector (71). The calibration arm (2) is rotatably connected to the second Y-shaped connector (71) by passing through the shaft hole and the second Y-shaped connector (71) via a rotating shaft.

7. A calibration mechanism for a large-range torque meter according to claim 1 or 6, characterized in that: The calibration arm (2) has multiple connecting holes in the middle, and connecting bolts (23) are threaded into the connecting holes. The calibration arm (2) is connected to the rotor of the torque meter (1) through the connecting bolts (23).

8. A calibration mechanism for a large-range torque meter according to claim 1, characterized in that: The force sensor (5) is a strain gauge force sensor (5).

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