Torque tool with automatic compensation value conversion

Abstract

Torque tool (10) with automatic compensation value conversion, comprising: a body (20) with a drive head (21) at one end thereof; and A measuring device (30) connected to the body (20) and configured to measure the torque of the drive head (21) to obtain a measured torque value, wherein the measuring device (30) has a control panel (31) with a display (311), a mode button (312), and an adjustment button (313), wherein the mode button (312) is configured to be pressed to switch the measuring device (30) from a working mode to a correction mode and to display the measured torque value on the display (311), wherein the adjustment button (313) is configured to be pressed to allow the input of a standard torque value, wherein the measuring device (30) calculates a first compensation ratio based on the measured torque value and the standard torque value, and wherein the first compensation ratio is between 0.5 and 1.5 inclusive. wherein, when the measuring device (30) is in operating mode, the measuring device (30) measures the torque of the drive head (21) and displays a compensation torque value on the display (311), and wherein the compensation torque value is the product of the measured torque value and the first compensation ratio.

Description

Background of the invention

[0001] The present invention relates to a torque tool and in particular to a torque tool with automatic compensation value conversion.

[0002] The need to return digital torque wrenches to the manufacturer for servicing or to calibrate them using specialized equipment arises from the fact that setting the calculation parameters of the measuring system in an electronic torque tool requires connecting the digital torque wrench to a computer or calibration device via a signal cable. This process is not feasible for general users or operators without access to calibration equipment. Brief description of the invention

[0003] The invention provides a torque tool with automatic compensation value conversion, comprising a body with a drive head at one end and a measuring device connected to the body and configured to measure the torque of the drive head to obtain a measured torque value. The measuring device has a control panel with a display, a mode button, and a setting button. The mode button is configured to switch the measuring device from a working mode to a correction mode and display the measured torque value. The setting button is configured to allow the input of a standard torque value.The measuring device calculates a first compensation ratio based on the measured torque value and the standard torque value, and this first compensation ratio is between 0.5 and 1.5 inclusive. When the measuring device is in operating mode, it measures the torque of the drive head and displays a compensation torque value on the screen, where the compensation torque value is the product of the measured torque value and the first compensation ratio.

[0004] The present invention is explained below with reference to the following detailed description of explanatory embodiments of the present invention, which are described in conjunction with the drawings. Brief description of the drawings Fig. Figure 1 shows a perspective view of a torque tool according to the present invention; Fig. Figure 2 shows a top view of the torque tool in Fig. 1 to represent a first parameter that is displayed on a screen; Fig. Figure 3 shows a top view of the torque tool in Fig. 1 to display a second parameter that is shown on the display; Fig. Figures 4 to 7 show top views of the torque tool in Fig. 1, which alternately display the first and second parameters on the display. Detailed description of the invention

[0005] The Fig. Figures 1 to 7 show a torque tool 10 according to the invention with automatic compensation value conversion in both perspective and top views. The torque tool 10 comprises a body 20 and a measuring device 30.

[0006] One end of the body 20 has a drive head 21.

[0007] The measuring device 30 is connected to the body 20 and configured to measure the torque of the drive head 21 in order to obtain a measured torque value. The measuring device 30 has a control panel 31 which includes a display 311, a mode button 312, and a setting button 313. The mode button 312 is configured to be pressed to switch the measuring device 30 from a working mode to a correction mode and to display the measured torque value on the display 311. The setting button 313 is configured to be pressed to allow the input of a standard torque value. The measuring device 30 calculates an initial compensation ratio based on the measured torque value and the standard torque value, with the initial compensation ratio being between 0.5 and 1.5 inclusive.When the measuring device 30 is in operating mode, the measuring device 30 measures the torque of the drive head 21 and displays a compensation torque value on the display 311, wherein the compensation torque value is the product of the measured torque value and the first compensation ratio.

[0008] The measuring device 30 is configured to define a limit torque value based on an upper nominal limit torque value that the drive head 21 can withstand. The measuring device 30 is further configured to define a first intermediate value that is greater than 0 and less than the limit torque value, and the measuring device 30 defines a first torque range and a second torque range based on the first intermediate value. The first torque range is greater than 0 and less than the first intermediate value, and the second torque range is greater than the first intermediate value and less than the limit torque value.When the measuring device 30 is in correction mode and the standard torque value has been entered, the measuring device 30 determines the first compensation ratio if the standard torque value is within the first torque range. The measuring device 30 then calculates a second compensation ratio based on the measured torque value and the standard torque value if the standard torque value is within the second torque range, with the second compensation ratio being between 0.5 and 1.5 inclusive. When the measuring device 30 is in operating mode and the measured torque value is within the first torque range, the compensation torque value displayed on the display 311 is the product of the measured torque value and the first compensation ratio.If the measured torque value is within the second torque range, the compensation torque value shown on display 311 is the product of the measured torque value and the second compensation ratio.

[0009] The measuring device 30 is configured to define a second intermediate value that is greater than the first intermediate value and less than the limit torque value. The first intermediate value is greater than 0 and less than the second intermediate value. The measuring device 30 defines a third torque range based on the second intermediate value. The second torque range is greater than the first intermediate value and less than the second intermediate value, and the third torque range is greater than the second intermediate value and less than the limit torque value.When the measuring device 30 is in correction mode and the standard torque value has been entered, and if the standard torque value is within the third torque range, the measuring device 30 calculates a third compensation ratio based on the measured torque value and the standard torque value, with the third compensation ratio being between 0.5 and 1.5 inclusive. When the measuring device 30 is in operating mode and the measured torque value is within the third torque range, the compensation torque value displayed on the display 311 is the product of the measured torque value and the third compensation ratio.

[0010] The first intermediate value is greater than 0.1 times and less than 0.4 times the limit torque value, and the second intermediate value is greater than 0.5 times and less than 0.8 times the limit torque value.

[0011] Mode button 312 is configured to be pressed to cause display 311 to show a correction interface F, and correction interface F displays a first parameter P1, which represents the numerical part of the measured torque value. Setting button 313 is configured to be pressed to cause correction interface F to display a second parameter P2, which represents the numerical part of the standard torque value. If the standard torque value is within the first torque range, the first compensation ratio is calculated as the ratio between the standard torque value and the measured torque value. If the standard torque value is within the second torque range, the second compensation ratio is calculated as the ratio between the standard torque value and the measured torque value.If the standard torque value is within the third torque range, the third compensation ratio is calculated as the ratio between the standard torque value and the measured torque value.

[0012] The relationship between the first compensation ratio and the measured torque value and the standard torque value can be expressed by Equation 1. The relationship between the second compensation ratio and the measured torque value and the standard torque value can be expressed by Equation 2. The relationship between the third compensation ratio and the measured torque value and the standard torque value can be expressed by Equation 3, where X1, X2, and X3 represent the first, second, and third compensation ratios, respectively. X1 = Standard torque value, measured torque value where 0 < standard torque value < first intermediate value. X2 = Standard torque value / Measured torque value where first intermediate value < standard torque value < second intermediate value. X2 = Standard torque value / Measured torque value where the second intermediate value is less than the standard torque value and less than the limit torque value.

[0013] For example, in practice, a user can use a commercially available torque testing machine to verify the torque tool 10 and determine the standard torque value (i.e., the second parameter P2). If the limit torque is 200 N·m, the first intermediate value can be set to 40 N·m and the second intermediate value to 120 N·m.

[0014] If the measuring device 30 is in correction mode and the torque tool 10 is used to apply a torque to the torque testing machine, and if the displayed first parameter P1 is 30 (as in Fig. 2 is shown) and the second parameter P2 30.3 entered by pressing the setting button 313 is (as shown in Fig. (as shown in Figure 3), this means that the measured torque value is smaller than the standard torque value by an error of 1%. Since the standard torque value is less than 40 N·m, the measuring device 30 sets the first compensation ratio to 1.01. The display 311 then shows the compensated torque value as the product of the measured torque value and 1.01 if the measured torque value is within the first torque range.

[0015] If the first displayed parameter P1 is 100 (as in Fig. 4 is shown) and the second parameter P2 99, entered by pressing the setting button 313, is (as shown in Fig. (as shown in Figure 5), this means that the measured torque value is greater than the standard torque value by an error of 1%. Since the standard torque value is greater than 40 N·m and less than 120 N·m, the measuring device 30 sets the second compensation ratio to 0.99. The display 311 then shows the compensated torque value as the product of the measured torque value and 0.99 when the measured torque value is within the second torque range.

[0016] Similarly, if the first parameter displayed is P1 140 (as in Fig. 6 is shown) and the second parameter P2 142.1, entered by pressing the setting button 313, is (as in Fig.(as shown in Figure 7), this indicates that the measured torque value is smaller than the standard torque value by an error of 1.5%. Since the standard torque value is greater than 120 N·m and less than 200 N·m, the measuring device 30 sets the third compensation ratio to 1.015. The display 311 then shows the compensated torque value as the product of the measured torque value and 1.015 when the measured torque value is within the third torque range.

[0017] The aforementioned structure of the Torque Tool 10 allows for on-site calibration and compensation settings, enabling the system to automatically calculate the compensation value. Errors can be corrected directly on the Torque Tool 10 without the need for an external computer or special calibration instruments. This functionality allows calibration with any torque testing machine, thereby improving and simplifying calibration and compensation settings.

[0018] Since most materials exhibit a non-linear relationship between the applied force and the resulting strain, this also applies to the torque tool 10. The output torque value of the torque tool 10 is not linearly related to the strain values ​​detected by strain gauges. To account for this, the torque tool 10 provides specific compensation values ​​for different torque ranges based on the torque value, thereby improving the accuracy of the compensated torque output. This ensures that the compensated torque value closely approximates the actual output torque value.

Claims

[1] Torque tool (10) with automatic compensation value conversion, comprising: a body (20) with a drive head (21) at one end thereof; and A measuring device (30) connected to the body (20) and configured to measure the torque of the drive head (21) to obtain a measured torque value, wherein the measuring device (30) has a control panel (31) with a display (311), a mode button (312), and an adjustment button (313), wherein the mode button (312) is configured to be pressed to switch the measuring device (30) from a working mode to a correction mode and to display the measured torque value on the display (311), wherein the adjustment button (313) is configured to be pressed to allow the input of a standard torque value, wherein the measuring device (30) calculates a first compensation ratio based on the measured torque value and the standard torque value, and wherein the first compensation ratio is between 0.5 and 1.5 inclusive. wherein, when the measuring device (30) is in operating mode, the measuring device (30) measures the torque of the drive head (21) and displays a compensation torque value on the display (311), and wherein the compensation torque value is the product of the measured torque value and the first compensation ratio. [2] Torque tool (10) according to claim 1, wherein the measuring device (30) is configured to determine a limit torque value based on an upper nominal limit torque value that the drive head (21) can withstand, wherein the measuring device (30) is further configured to determine a first intermediate value that is greater than 0 and less than the limit torque value, wherein the measuring device (30) defines a first torque range and a second torque range based on the first intermediate value, wherein the first torque range is greater than 0 and less than the first intermediate value and the second torque range is greater than the first intermediate value and less than the limit torque value. wherein, when the measuring device (30) is in correction mode and the standard torque value has been entered, and if the standard torque value is within the first torque range, the measuring device (30) receives the first compensation ratio, and if the standard torque value is within the second torque range, the measuring device (30) calculates a second compensation ratio based on the measured torque value and the standard torque value, wherein the second compensation ratio is between 0.5 and 1.5 inclusive, and wherein, when the measuring device (30) is in operating mode, the compensation torque value displayed on the display (311) is the product of the measured torque value and the first compensation ratio if the measured torque value is within the first torque range, and the compensation torque value displayed on the display (311) is the product of the measured torque value and the second compensation ratio if the measured torque value is within the second torque range. [3] Torque tool (10) according to claim 2, wherein the measuring device (30) is configured to set a second intermediate value which is greater than the first intermediate value and less than the limit torque value, wherein the first intermediate value is greater than 0 and less than the second intermediate value, wherein the measuring device (30) defines a third torque range based on the second intermediate value, wherein the second torque range is greater than the first intermediate value and less than the second intermediate value, wherein the third torque range is greater than the second intermediate value and less than the limit torque value, wherein, when the measuring device (30) is in correction mode and the standard torque value has been entered, and if the standard torque value is within the third torque range, the measuring device (30) calculates a third compensation ratio based on the measured torque value and the standard torque value, wherein the third compensation ratio is between 0.5 and 1.5, and wherein, when the measuring device (30) is in operating mode and when the measured torque value is within the third torque range, the compensation torque value displayed on the display (311) is the product of the measured torque value and the third compensation ratio. [4] Torque tool (10) according to claim 3, wherein the first intermediate value is greater than 0.1 times and less than 0.4 times the limit torque value and the second intermediate value is greater than 0.5 times and less than 0.8 times the limit torque value. [5] Torque tool (10) according to claim 3, wherein the mode button (312) is configured to be pressed to cause the display (311) to show a correction interface (F), wherein the correction interface (F) displays a first parameter (P1) representing the numerical part of the measured torque value, wherein the setting button (313) is configured to be pressed to cause the correction interface (F) to display a second parameter (P2) representing the numerical part of the standard torque value, where, if the standard torque value lies within the first torque range, the first compensation ratio is calculated as the ratio between the standard torque value and the measured torque value. where, if the standard torque value lies within the second torque range, the second compensation ratio is calculated as the ratio between the standard torque value and the measured torque value, and where, if the standard torque value is within the third torque range, the third compensation ratio is calculated as the ratio between the standard torque value and the measured torque value.

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