Novel single-key digital display torsion fastening tool

Abstract

The utility model discloses a novel single-key digital display torsion fastening tool, which structurally comprises a shell, a fastening head, a handle part, a circuit board, a microprocessor, a liquid crystal display screen, a light touch switch and the like, and is mainly characterized in that a combined sensor is additionally arranged on the circuit board and comprises a three-dimensional (3D) accelerometer and a 3D gyroscope; when a user operates the torsion fastening tool to form a certain gesture motion state, a signal formed by the gesture motion state can be detected by the cooperation of the 3D accelerometer and the 3D gyroscope, and then the signal is directly transmitted to the microprocessor for calculation and judgment. Finally, numerical parameters of various function items, corresponding to the fastening working state of the digital display torsion fastening tool, displayed on the liquid crystal display screen can be specifically set in cooperation with the operation of the light touch switch; therefore, the improved structure can realize specific target value setting of numerical parameters on the basis of retaining the advantages of a single-key structure, so that the fastening and inspection accuracy is ensured, and the application function is expanded.

Description

Technical Field

[0001] The utility model relates to a digital display torque fastening tool for tightening and loosening screws and nuts, in particular to a novel single-button digital display torque fastening tool. Background Art

[0002] The digital torque tightening tool is a tightening tool used for tightening and loosening screws and nuts and for inspecting them. It can be widely used in product assembly and inspection. Its structure mainly consists of a shell, a tightening head installed at the front of the shell and a handle installed at the rear of the shell. A circuit board is arranged in the shell, and a microprocessor is arranged on the circuit board, as well as an LCD screen and a touch switch exposed on the surface of the shell. The LCD screen can display various functional items of the tightening working status of the tightening head and the numerical parameters corresponding to the various functional items, and the touch switch usually adopts a single-button press structure design to ensure that the overall digital torque tightening tool can be made more compact, lightweight and beautiful. However, only designing a single-button structure can only solve the problem of turning the digital torque tightening tool on and off and setting some cycle parameters, but cannot specifically set the numerical parameters, that is, it is not possible to set tightening and inspection tasks with specific numerical requirements, such as being unable to set a target value with specific data for tightening. This makes it impossible to determine whether the set value is qualified during the tightening process of the tightening head, thereby affecting the accurate processing of the next step; at the same time, some functions that require specific numerical coordination cannot be applied, such as password values ​​with authority requirements cannot be set and applied, so that the digital torque tightening tool does not have a password protection function, which greatly limits its application function. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a new single-button digital display torque tightening tool which can achieve the specific target value setting of numerical parameters while retaining the advantages of the single-button structure, thereby ensuring the accuracy of tightening and inspection and expanding the application function.

[0004] The technical problem of the utility model is achieved through the following technical solutions:

[0005] A novel single-button digital display torque tightening tool comprises a shell, a tightening head installed at the front of the shell and a handle installed at the rear of the shell; a circuit board is arranged in the shell, a microprocessor is arranged on the circuit board, and a liquid crystal display screen and a touch switch are exposed on the surface of the shell; the tightening head contacts the tightened object and enters a tightening working state, and various functional items of the tightening working state and numerical parameters corresponding to the various functional items are displayed on the liquid crystal display screen, and a combined sensor is also arranged on the circuit board, and the combined sensor includes a 3D accelerometer and a 3D gyroscope, and after the 3D accelerometer and the 3D gyroscope cooperate with each other to detect the signal of the gesture movement state of operating the torque tightening tool, the signal of the gesture movement state is directly transmitted to the microprocessor for calculation and judgment, and then the numerical parameters corresponding to the various functional items are set in cooperation with the operation of the touch switch.

[0006] The touch switch controls the opening and closing of the liquid crystal display screen, and the confirmation or switching of various function items displayed on the liquid crystal display screen.

[0007] The housing is composed of an upper shell and a lower shell which are fixed to each other; the circuit board is fixed in the upper shell; and a torque sensor, a battery and a buzzer connected to the circuit board are arranged in the lower shell.

[0008] The circuit board is provided with a display light group and a USB interface, and the USB interface outputs data or charges the battery through the USB interface.

[0009] The side surface of the upper shell is provided with a side hole for exposing the USB interface.

[0010] The top surface of the upper shell is provided with a PVC panel, on which a transparent window for displaying the display light group and the liquid crystal display screen, and a single button for pressing to open and close the touch switch are provided.

[0011] The USB interface, liquid crystal display, 3D accelerometer and 3D gyroscope are all directly welded on the circuit board.

[0012] The rear end of the torque sensor is inserted parallel to the handle to form a fastening, and the front end of the torque sensor is connected to the fastening head.

[0013] Compared with the prior art, the utility model mainly adds a combined sensor on the circuit board, and the combined sensor includes a 3D accelerometer and a 3D gyroscope. When the user operates the torque tightening tool to form a certain gesture motion state, the signal formed by the gesture motion state will be detected by the 3D accelerometer and the 3D gyroscope in cooperation with each other, and then the signal of the gesture motion state is directly transmitted to the microprocessor for calculation and judgment, and finally, in conjunction with the operation of the light touch switch, the numerical parameters of various functional items of the tightening working state corresponding to the digital display torque tightening tool displayed on the LCD screen can be specifically set; therefore, the improved structure can achieve the specific target value setting of the numerical parameters on the basis of retaining the advantages of the single-key structure, thereby ensuring the accuracy of tightening and inspection and expanding the application function. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 for Figure 1 Schematic diagram of the structure with the upper shell removed.

[0016] Figure 3 for Figure 1 Exploded view after the shell is removed.

[0017] Figure 4 A three-dimensional diagram of a circuit board.

[0018] Figure 5 This is the front structure diagram after removing the LCD screen from the circuit board.

[0019] Figure 6 This is the back structure diagram of the circuit board.

[0020] Figure 7 This is a working diagram for setting TR as the target torque value. DETAILED DESCRIPTION

[0021] The embodiments of the present invention will be described in detail below according to the above-mentioned drawings.

[0022] like Figure 1 to Figure 7 As shown, 1. shell, 11. upper shell, 12. lower shell, 2. fastening head, 3. handle, 4. PVC panel, 41. transparent window, 42. single key, 5. circuit board, 51. LCD screen, 52. touch switch, 53. combination sensor, 54. display light group, 55. USB interface, 56. microprocessor, 6. torque sensor, 7. battery, 8. buzzer.

[0023] New single-button digital torque fastening tools, such as Figure 1As shown, it belongs to a digital torque tightening tool for tightening and loosening screws and nuts, and its structure is mainly composed of a shell 1, a tightening head 2 installed at the front of the shell and a handle 3 installed at the rear of the shell. Commonly used digital torque tightening tools usually include digital torque screwdrivers, digital torque wrenches and digital torque sensors. In this embodiment, a digital torque screwdriver is selected.

[0024] The fastening head 2 is used to contact the tightened object and enter the fastening working state; the shell 1 is composed of an upper shell 11 and a lower shell 12 that are interlocked and fixed to each other. A circuit board 5 is fixed in the upper shell 11 by four mounting screws, and a torque sensor 6, a battery 7 and a buzzer 8 for connecting the circuit board 5 are arranged in the lower shell 12; the handle 3 is designed to be an arc or a round cake shape according to the torque value. If it is designed to be an arc-shaped handle, a power assist rod must be provided on the arc-shaped handle. Therefore, the handle 3 mainly plays the role of ensuring hand contact and force when twisting the digital torque fastening tool.

[0025] The circuit board 5 is provided with a microprocessor 56, a display light group 54, a USB interface 55 and a combined sensor 53, as well as a liquid crystal display screen 51 and a touch switch 52 exposed on the surface of the shell 1; the combined sensor 53 includes a 3D accelerometer and a 3D gyroscope, and the liquid crystal display screen 51, the 3D accelerometer, and the 3D gyroscope are directly welded on the circuit board 5 to ensure that the three are in good contact with the microprocessor 56 and reduce wiring. Then, the circuit board 5 is fixed in the upper shell 11, which can ensure that when the shell 1 moves, the 3D accelerometer and the 3D gyroscope can form a synchronous movement.

[0026] The display light group 54 and USB interface 55 are also directly welded on the circuit board 5. The display light group 54 includes LED display lights for OK and NG. The USB interface 55 can be connected to a computer via a USB cable to output data or connected to a USB interface via a USB cable to charge the battery 7. The USB interface 55 can be exposed from a side hole preset on the side of the upper shell 11.

[0027] The LCD screen 51 can display various functional items of the tightening working state when the tightening head contacts the tightening object and the numerical parameters corresponding to the various functional items; the touch switch 52 is used to control the opening and closing of the LCD screen 51, as well as the confirmation or switching of various functional items displayed on the LCD screen 51.

[0028] The top surface of the upper shell 11 is provided with a PVC panel 4 that is pasted and fixed. The PVC panel is provided with a transparent window 41 that can display the display light group 54 and the liquid crystal display screen 51, and a single key 42 that can be used to press the touch switch 52 to open and close. The specific structure is: the top surface of the upper shell 11 is provided with a left hole, a middle hole and a right hole, the display light group 54 is exposed in the left hole, the liquid crystal display screen 51 is exposed in the middle hole, and the single key 42 is arranged in the right hole. When the PVC panel 4 covers the left hole, the middle hole and the right hole at the same time, it can play a protective role without affecting the viewing of the display light group 54 and the liquid crystal display screen 51.

[0029] The torque sensor 6 can connect the torque signal to the circuit board 5 through four connecting wires. The rear end of the torque sensor 6 is inserted into the handle 3 in parallel, and then fastened to the handle by a set screw. The handle 3 is also fixed to the lower shell 12 by screws. The front end of the torque sensor 6 is connected to the fastening head 2. Such a connection structure can ensure that the torque reaches the torque sensor 6 without loss. The working principle of the torque sensor is: the front end of the torque sensor 6 generates an MV signal with voltage energy provided by the battery 7 due to the force applied to the fastening head 2. The MV signal is amplified by the amplifier on the circuit board 5 and then processed by the microprocessor 56. The torque value is then displayed on the LCD screen 51 in the form of numerical parameters. At the same time, the torque value can be judged whether it is qualified based on the set target value and other parameters, and the next step of data processing can be performed.

[0030] The battery 7 is connected to the circuit board 5 through positive and negative connecting lines, and can supply power to the circuit board and receive external power through the USB interface 55 for charging; the buzzer 8 is connected to the circuit board 5 through two wires, and when the measured value exceeds the set value, an alarm sound will be issued through the buzzer 8. After each numerical parameter is set, a short sound can also be issued after the single button 42 is pressed to confirm.

[0031] After the 3D accelerometer and 3D gyroscope cooperate with each other to detect the signal of the gesture movement state of operating the torque tightening tool, the signal of the gesture movement state can be directly transmitted to the microprocessor 56 for calculation and judgment, and then cooperated with the operation of the touch switch 52 to set the numerical parameters corresponding to various function items.

[0032] Among them, the gesture motion state refers to the motion tracking and gesture detection when operating the digital torque tightening tool. Usually, the specific digital setting and specific digit determination of the numerical parameters can be performed. The specific digital setting refers to the adjustment and setting of Arabic numerals from 0 to 9. The specific digit determination refers to the selection and determination of specific positions such as ones, tens, hundreds, or thousands in a multi-digit number. When the digital torque tightening tool is operated in the gesture motion state, it must also be ensured that the digital torque tightening tool is placed flat with the LCD screen facing upwards.

[0033] The specific number setting method is: rotate the horizontal digital torque tightening tool radially forward once around the axis and reset it, or rotate it radially backward once around the axis and reset it, so as to form the specific digital adjustment setting. For example, when the current number is 5, the current number 5 can be adjusted to 6 by rotating it radially forward once around the axis of the digital torque tightening tool and reset it, or the current number 5 can be adjusted to 4 by rotating it radially backward once around the axis of the digital torque tightening tool and reset it.

[0034] The specific digit is determined by swinging the horizontal digital torque tightening tool to the left once around the center point and resetting it, or swinging it to the right once around the center point and resetting it, so as to select and determine the specific position of the ones, tens, hundreds, or thousands. For example, when the current target value is a four-digit number and the specific number to be adjusted is in the tens place, it can be adjusted from the tens place to the hundreds place by swinging it to the left once around the center point and resetting it, or it can be adjusted from the tens place to the ones place by swinging it to the right once around the center point and resetting it.

[0035] The 3D accelerometer is used to measure the inertial force vector, which can be decomposed into components corresponding to the X, Y, and Z axes:

[0036] RxAcc = (AdcRx * Vref / 1023 - VzeroG) / Sensitivity

[0037] RyAcc = (AdcRy * Vref / 1023-VzeroG) / Sensitivity

[0038] RzAcc =(AdcRz * Vref / 1023-VzeroG) / Sensitivity

[0039] The ADC values ​​of this group of accelerometers are analyzed and processed by the microprocessor to determine the action.

[0040] The 3D gyroscope is used to measure the rate of change of the angle of rotation. It outputs a value that is linearly related to the rate of change of the angle. Assume that at time to, we have measured the angle of rotation of the Y axis (AXZ), which is defined as AXZ0. Then at time t1, we measure this angle again and get AXZ1. The rate of change of the angle is:

[0041] Rate AXZ = (AXZ1-AXZ0) / (t1-t0) in degrees per second. This quantity is given to the microprocessor for analysis.

[0042] The working principle of the 3D accelerometer and 3D gyroscope is as follows: when the digital torque fastening tool is placed flat and the LCD screen faces upward, three directions of X, Y and Z are formed, the gravity value is displayed in the Z direction, and 0 is displayed in the X and Y directions. When the digital torque fastening tool moves, its motion acceleration superimposed on the gravity acceleration will be decomposed into the three directions of X, Y and Z. When the digital torque fastening tool is stationary, the values ​​of X, Y and Z are 0. When the digital torque fastening tool rotates, the angular velocity will be decomposed into three axial rotation angular velocities.

[0043] Therefore, the gesture operation detection principle applied to the digital torque tightening tool by combining the three directions of X, Y, and Z is: hold the digital torque tightening tool horizontally, with the left and right swing direction as X, the front and back radial rotation direction as Y, and the up and down direction as Z. When the digital torque tightening tool rotates along the X-axis, the acceleration change in the Y-axis direction is the main force component + the force velocity component of the motion itself, and the angular velocity of the X-axis changes. When it is detected that the Y-axis acceleration reaches a certain threshold and the X-axis angular velocity reaches a certain threshold, it can be considered that the value increase action is effective.

[0044] When the action is detected to be effective, the digital torque tightening tool needs to return to the horizontal state and the Y-axis acceleration returns to 0, which can prevent continuous action and malfunction and continue to the next action.

[0045] The utility model further combines a specific example to describe the specific setting method of the new single-button digital display torque fastening tool, such as Figure 7 As shown, when the single button 42 is long pressed, the setting mode is entered. The gesture motion state takes the increase of the value as an example. Among the numbers 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9, the handheld digital torque tightening tool is in a flat state with the LCD screen facing upward. At this time, the left and right direction is X, the front and back direction is Y, and the up and down direction is Z. When the digital torque tightening tool rotates around the X-axis, the acceleration in the Y-axis direction changes, that is, the gravity component + the acceleration component of the movement itself, and the angular velocity of the X-axis also changes. When it is detected that the Y-axis acceleration reaches a certain threshold and the X-axis angular velocity also reaches a certain set threshold, it is considered that the value increase action is valid. At this time, after the action is determined to be valid, the digital torque tightening tool needs to return to the original flat state, and the Y-axis acceleration returns to 0 to prevent continuous action and malfunction, and then continue to the next action.

[0046] When the corresponding digit needs to select a digit among Ⅰ, Ⅱ, Ⅲ, and Ⅳ, the handheld digital torque tightening tool is placed flat with the LCD screen facing upwards, the left and right direction is X, the front and back direction is Y, and the up and down direction is Z. The digital torque tightening tool needs to be swung left and right around the Y axis to select a digit among Ⅰ, Ⅱ, Ⅲ, and Ⅳ. The selection is usually displayed on the LCD screen in the form of a jumping box.

[0047] The utility model can also set graded authorization passwords for numerical values ​​through the cooperation of a 3D accelerometer, a 3D gyroscope and a single button press to prevent unauthorized persons from modifying the set numerical values, thereby ensuring that the products are produced according to the set parameters and the normal quality of the products.

[0048] The above description is only a specific embodiment of the present invention. Those skilled in the art should understand that any structural design equivalent to this embodiment should be included in the protection scope of the present invention.

Claims

1. A novel single-button digital display torque tightening tool, comprising a housing (1), a tightening head (2) mounted at the front of the housing, and a handle (3) mounted at the rear of the housing; a circuit board (5) is arranged inside the housing (1), the circuit board is provided with a microprocessor (56), and a liquid crystal display (51) and a touch switch (52) are exposed on the surface of the housing; the tightening head (2) contacts the object to be tightened and enters a tightening working state, and various functional items of the tightening working state and numerical parameters corresponding to the various functional items are displayed on the liquid crystal display (51), characterized in that The circuit board (5) is also provided with a combined sensor (53), which includes a 3D accelerometer and a 3D gyroscope. After the 3D accelerometer and the 3D gyroscope cooperate with each other to detect the signal of the gesture movement state of operating the torque tightening tool, the signal of the gesture movement state is directly transmitted to the microprocessor (56) for calculation and judgment, and then cooperates with the operation of the touch switch (52) to set the numerical parameters corresponding to various function items.

2. The new single-button digital torque fastening tool according to claim 1 is characterized in that The touch switch (52) controls the opening and closing of the liquid crystal display screen (51), and the confirmation or switching of various function items displayed on the liquid crystal display screen (51).

3. The new single-button digital torque fastening tool according to claim 1 is characterized in that The housing (1) is composed of an upper housing (11) and a lower housing (12) which are fastened to each other; the circuit board (5) is fixed in the upper housing (11); and the lower housing (12) is provided with a torque sensor (6) connected to the circuit board (5), a battery (7) and a buzzer (8).

4. The new single-button digital torque fastening tool according to claim 3 is characterized in that The circuit board (5) is provided with a display light group (54) and a USB interface (55), and the USB interface outputs data or charges the battery (7) via the USB interface.

5. The new single-button digital torque fastening tool according to claim 3 is characterized in that A side hole for exposing the USB interface (55) is provided on the side of the upper shell (11).

6. The new single-button digital torque fastening tool according to claim 4 is characterized in that The top surface of the upper shell (11) is provided with a PVC panel (4), and the PVC panel is provided with a transparent window (41) for displaying the display light group (54) and the liquid crystal display screen (51), and a single key (42) for pressing to open and close the touch switch (52).

7. The new single-button digital torque fastening tool according to claim 4 is characterized in that The USB interface (55), liquid crystal display (51), 3D accelerometer and 3D gyroscope are all directly welded on the circuit board (5).

8. The new single-button digital torque fastening tool according to claim 3 is characterized in that The rear end of the torque sensor (6) is inserted parallel to the handle (3) to form a fastening, and the front end of the torque sensor (6) is connected to the fastening head (2).

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