A tool handle with built-in vibration sensor

Abstract

The present invention discloses a tool handle with a built-in vibration sensor, comprising a tool handle body, a data acquisition circuit board, a vibration acquisition component, an electric energy receiving component and an electric energy sending component, wherein an inner hole is provided in the middle of the tool handle body, the data acquisition circuit board and the vibration acquisition component are installed in the inner hole, the electric energy receiving component is arranged on the outer surface of the tool handle body, the electric energy sending component is coaxially installed with the tool handle body, the electric energy sending component and the electric energy receiving component are arranged opposite to each other with a gap, the electric energy sending component and the electric energy receiving component perform wireless power transmission and supply power to the data acquisition circuit board. The present invention solves the problem of long propagation path of vibration signal during cutting vibration measurement, improves the signal-to-noise ratio of vibration signal, and reduces the difficulty of subsequent processing of vibration signal.

Description

Technical Field

[0001] The invention relates to the technical field of tool handles for measuring vibration signals, and in particular to a tool handle with a built-in vibration sensor. Background Art

[0002] At present, the signal acquisition in the metal cutting process mainly collects the cutting tool temperature and cutting tool deformation to analyze the cutting performance. However, there are few literature reports on the acquisition of vibration signals generated during the cutting process. Changes in stress, temperature and other cutting process parameters during the cutting process will lead to changes in vibration signals. Therefore, vibration signals can be used as a reference indicator to comprehensively reflect the cutting stability performance.

[0003] Metal cutting machine tools are mechanical equipment. The general method for collecting vibration signals of mechanical equipment is to attach a vibration sensor to a frame position close to the vibration source to obtain the vibration signal. If this method is used to measure the vibration signal during the cutting process, the vibration signal generated by the vibration source is obtained by the vibration sensor through the tool, tool handle, frame and other components. The long vibration propagation path causes the obtained vibration signal to contain a lot of noise and a low signal-to-noise ratio, making it difficult to process the vibration signal later. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a tool handle with a built-in vibration sensor, which solves the problem of long vibration signal propagation path during cutting vibration measurement, improves the signal-to-noise ratio of the vibration signal, and reduces the difficulty of subsequent processing of the vibration signal.

[0005] The technical solution of the present invention is: a knife handle with a built-in vibration sensor, including a knife handle body, a data acquisition circuit board, a vibration acquisition component, an electric energy receiving component and an electric energy sending component, the middle part of the knife handle body is provided with an inner hole, the data acquisition circuit board and the vibration acquisition component are installed in the inner hole, the electric energy receiving component is arranged on the outer surface of the knife handle body, the electric energy sending component is coaxially installed with the knife handle body, the electric energy sending component and the electric energy receiving component are arranged opposite to each other with a gap, the electric energy sending component and the electric energy receiving component perform wireless power transmission and power the data acquisition circuit board. Among them, the electric energy receiving component and the electric energy sending component are used in combination to power the vibration acquisition component and the data acquisition circuit board, the vibration acquisition component transmits the collected vibration signal to the data acquisition circuit board for processing and storage, and the vibration data of the knife handle can be obtained; the electric energy sending component and the knife handle body are coaxially installed on the same frame, and the electric energy sending component is fixed by bolt connection.

[0006] The handle body is also provided with a lead hole connected to the inner hole, and the power lines of the power receiving component and the data acquisition circuit board pass through the lead hole. The inner hole is provided with a circuit board mounting groove and two retaining ring mounting grooves. The circuit board mounting groove is parallel to the axis of the handle body, and the data acquisition circuit board is arranged in the circuit board mounting groove. The two retaining ring mounting grooves are both perpendicular to the axis of the handle body, and a retaining ring is arranged in each retaining ring mounting groove. The vibration acquisition component is arranged between the two retaining rings. Among them, the circuit board mounting groove axially fixes the data acquisition circuit board and radially fixes the retaining ring and the retaining ring mounting groove axially fixes the vibration acquisition component. The vibration acquisition component is arranged behind the data acquisition circuit board, that is, the axial position of the vibration acquisition component is located between the data acquisition circuit board and the chuck.

[0007] The data acquisition circuit board includes a data storage card, an A / D converter, a power conversion device and a central processing unit. The power conversion device includes an AC-DC power module, and the data storage card stores the data of the vibration signal.

[0008] The vibration collection component includes a first shell, a spring, a vibration sensor and a vibration transmission member. The spring is installed in the middle of the first shell. Both ends of the spring are provided with vibration sensors. The lead wires of the vibration sensor are connected to the data acquisition circuit board. The vibration transmission member includes a mounting platform and an input rod. The mounting platform is tightly fitted with the vibration sensor, and the input rod is in contact with the inner wall of the inner hole. The spring is in a compressed state. The spring applies spring force to the vibration sensors and the vibration transmission member at both ends, so that the vibration transmission member maintains close contact with the inner wall of the inner hole, which is conducive to collecting vibration signals.

[0009] The vibration collection component also includes an end cover that matches the first shell, a boss for positioning is provided on the outer side of the first shell, a groove is provided on the side wall of the first shell, and a convex block that matches the groove is provided on the circumference of the end cover; a rectangular groove and a first through hole located at the center of the rectangular groove are provided in the middle of the first shell, and the spring, vibration sensor and vibration transmission member are all installed in the rectangular groove, and the lead wire of the vibration sensor passes through the first through hole, and a second through hole is provided on the side wall at both ends of the rectangular groove, and the input rod passes through the second through hole and is in close contact with the inner wall of the inner hole. Among them, the end cover seals the spring, vibration sensor and vibration transmission member in the first shell to prevent them from falling off, and the boss is embedded in the circuit board mounting groove of the handle body, thereby radially fixing the vibration collection component; the lead wire of the vibration sensor passes through the spring center axis and the first through hole, and is connected to the data acquisition circuit board.

[0010] The vibration sensor adopts a vibration acceleration sensor, and the vibration sensor is bonded to the mounting platform to obtain high-quality vibration signals.

[0011] The power transmission component includes a second shell and a power transmission coil arranged in the second shell, and the power receiving component includes a third shell and a power receiving coil arranged in the third shell. The third shell is provided with a third through hole, and the lead wire of the power receiving coil passes through the third through hole and is connected to the data acquisition circuit board. The power receiving coil is arranged opposite to the power transmission coil. Among them, the second shell and the third shell are both cylindrical shells, the second shell is installed on the frame by bolts, and the third shell is fixed to the outer surface of the handle body by cold installation; the power transmission coil is coaxial with the power receiving coil, facing each other, and not in contact. When the power transmission coil is connected to alternating current, the power receiving coil induces alternating current, and the lead wire of the power receiving coil is connected to the data acquisition circuit board through the third through hole and the lead hole. The data acquisition circuit board is provided with an AC to DC module, which can convert the alternating current provided by the power receiving coil into direct current for use.

[0012] The power transmitting coil is 4-5 mm longer than the power receiving coil; the gap between the inner surface of the second shell and the outer surface of the handle body is 2-5 mm, and the gap between the inner surface of the second shell and the outer surface of the third shell is 2-5 mm.

[0013] The power transmission component further includes a signal receiving coil, which is disposed in the second housing, and the power reception component further includes a signal transmitting coil, which is disposed in the third housing, and the signal receiving coil is directly opposite to the signal transmitting coil. The vibration signal stored in the data acquisition circuit board can be wirelessly transmitted through the signal receiving coil and the signal transmitting coil, which is convenient for operation and use.

[0014] The tail end of the handle body is also provided with a chuck and a nut, and the data acquisition circuit board is also provided with a buzzer. When the data storage card on the data acquisition circuit board is full or the system fails, the buzzer can sound an alarm.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The tool handle with a built-in vibration sensor of the present invention adopts a power sending component to wirelessly power a power receiving component, and the power receiving component then powers a data acquisition circuit board. The rotary motion of the tool handle body will not cause damage to the power module. The power module has a long service life, reliable power supply, and is easy to use, thus solving the problem of powering the sensor inside the tool.

[0017] The tool handle with a built-in vibration sensor of the present invention uses a built-in vibration acquisition component to directly obtain the vibration signal generated on the tool handle during the cutting process, which can shorten the propagation path of the cutting vibration signal to the greatest extent, and the obtained vibration signal has a high signal-to-noise ratio, thereby reducing the difficulty of subsequent vibration signal processing;

[0018] The tool handle with a built-in vibration sensor of the present invention uses a signal sending coil to transmit vibration data to a signal receiving coil. The size of the transmitted data depends on the coupling frequency between the signal sending coil and the signal receiving coil, and is not affected by the coupling frequency between the power sending coil and the power receiving coil and the movement of the tool handle body. The transmitted data is reliable and stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the tool handle with a built-in vibration sensor.

[0020] Figure 2 for Figure 1 A magnified view of .

[0021] Figure 3 for Figure 1 Enlarged view of point B.

[0022] Figure 4 It is a structural schematic diagram of the vibration collection component.

[0023] Figure 5 It is a schematic structural diagram of the first shell.

[0024] Figure 6 It is a schematic diagram of the structure of the end cover.

[0025] Figure 7 It is a structural schematic diagram of the vibration transmission component.

[0026] Figure 8 It is a schematic diagram of the structure of the tool handle body, chuck and nut.

[0027] Fig. 9 This is a schematic diagram of the structure of Example 2.

[0028] As shown in the figure, 100 is the shank body, 101 is the lead hole, 102 is the circuit board mounting groove, 103 is the retaining ring mounting groove, 104 is the inner hole, 200 is the second shell, 210 is the power sending coil, 211 is the signal receiving coil, 300 is the third shell, 310 is the power receiving coil, 311 is the signal sending coil, 320 is the third through hole, 400 is the data acquisition circuit board, 500 is the retaining ring, 600 is the first shell, 601 is the boss, 602 is the groove, 603 is the first through hole, 604 is the second through hole, 610 is the spring, 620 is the end cover, 621 is the bump, 630 is the vibration sensor, 640 is the vibration transmission part, 641 is the mounting platform, 642 is the input rod, 700 is the chuck, and 800 is the nut. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below in conjunction with examples, but the embodiments of the present invention are not limited thereto.

[0030] Example 1

[0031] This embodiment is a tool handle with a built-in vibration sensor, such as Figure 1 As shown, it includes a handle body 100, a data acquisition circuit board 400, a vibration acquisition component, a power receiving component and a power sending component. An inner hole 104 is provided in the middle of the handle body, the data acquisition circuit board and the vibration acquisition component are installed in the inner hole, the power receiving component is arranged on the outer surface of the handle body, the power sending component is coaxially installed with the handle body, the power sending component and the power receiving component are arranged opposite to each other with a gap, the power sending component and the power receiving component perform wireless power transmission and power the data acquisition circuit board. Among them, the power receiving component and the power sending component are used in conjunction to power the vibration acquisition component and the data acquisition circuit board, and the vibration acquisition component transmits the collected vibration signal to the data acquisition circuit board for processing and storage, so that the vibration data of the handle can be obtained; the power sending component and the handle body are coaxially installed on the same frame, and the power sending component is fixed by bolt connection.

[0032] like Figure 8 As shown, the handle body is also provided with a lead hole 101 connected to the inner hole, and the power line of the power receiving component and the data acquisition circuit board passes through the lead hole. The inner hole is provided with a circuit board installation groove 102 and two retaining ring installation grooves 103. The circuit board installation groove is parallel to the axis of the handle body, and the data acquisition circuit board is arranged in the circuit board installation groove. The two retaining ring installation grooves are perpendicular to the axis of the handle body. A retaining ring 500 is arranged in each retaining ring installation groove, and the vibration collection component is arranged between the two retaining rings. The circuit board installation groove axially fixes the data acquisition circuit board and radially fixes the retaining ring and the retaining ring installation groove axially fixes the vibration collection component. The vibration collection component is arranged behind the data acquisition circuit board, that is, the axial position of the vibration collection component is located between the data acquisition circuit board and the chuck. The tail end of the handle body is also provided with a chuck 700 and a nut 800.

[0033] The data acquisition circuit board includes a data storage card, an A / D converter, a power conversion device and a central processing unit. The power conversion device includes an AC-DC power module, and the data storage card stores the data of the vibration signal. A buzzer is also provided on the data acquisition circuit board. When the data storage card on the data acquisition circuit board is full or the system fails, the buzzer can sound an alarm.

[0034] like Figures 3 to 7As shown, the vibration collection component includes a first shell 600, a spring 610, a vibration sensor 630 and a vibration transmission member 640. The spring is installed in the middle of the first shell. Both ends of the spring are provided with vibration sensors. The vibration sensor is connected to the vibration transmission member. The lead wire of the vibration sensor is connected to the data acquisition circuit board. The vibration transmission member includes a mounting platform 641 and an input rod 642. The mounting platform is tightly fitted with the vibration sensor, and the input rod is in contact with the inner wall of the inner hole. The vibration signal of the handle body is transmitted to the vibration sensor through the vibration transmission member. The spring is in a compressed state. The spring applies spring force to the vibration sensors and the vibration transmission member at both ends, so that the vibration transmission member is in close contact with the inner wall of the inner hole, which is conducive to collecting vibration signals.

[0035] The vibration collection component also includes an end cover 620 that matches the first shell. The outer side of the first shell is provided with a boss 601 for positioning. The side wall of the first shell is provided with a groove 602. The circumference of the end cover is provided with a convex block 621 that matches the groove. The middle part of the first shell is provided with a rectangular groove and a first through hole 603 located at the center of the rectangular groove. The spring, vibration sensor and vibration transmission member are all installed in the rectangular groove. The lead wire of the vibration sensor passes through the first through hole. The side walls at both ends of the rectangular groove are provided with a second through hole 604. The input rod passes through the second through hole and is in close contact with the inner wall of the inner hole. The end cover seals the spring, vibration sensor and vibration transmission member in the first shell to prevent them from falling off. The boss is embedded in the circuit board mounting groove of the handle body, thereby radially fixing the vibration collection component. The lead wire of the vibration sensor passes through the hollow part of the spring and the first through hole and is connected to the data acquisition circuit board.

[0036] The vibration sensor adopts a vibration acceleration sensor, and the vibration sensor is bonded to the mounting platform to prevent the vibration transmission component from being separated from the vibration sensor, so as to obtain a high-quality vibration signal.

[0037] like Figure 2As shown, the power transmission component includes a second shell 200 and a power transmission coil 210 disposed in the second shell, and the power receiving component includes a third shell 300 and a power receiving coil 310 disposed in the third shell. The third shell is provided with a third through hole 320, and the lead wire of the power receiving coil passes through the third through hole and is connected to the data acquisition circuit board, and the power receiving coil is arranged opposite to the power transmission coil. The second shell and the third shell are both cylindrical shells, the second shell is mounted on the frame by bolts, and the third shell is fixed to the outer surface of the handle body by cold installation; the power transmission coil and the power receiving coil are coaxial, opposite, and non-contacting, when the power transmission coil is connected to the alternating current, the power receiving coil induces the alternating current, and the lead wire of the power receiving coil is connected to the data acquisition circuit board through the third through hole and the lead hole, and the data acquisition circuit board is provided with an AC-DC power supply module, which can convert the alternating current provided by the power receiving coil into direct current for use by the data acquisition circuit board and the vibration acquisition component. The power transmitting coil is 4 mm longer than the power receiving coil; the gap between the inner surface of the second shell and the outer surface of the handle body is 3 mm, and the gap between the inner surface of the second shell and the outer surface of the third shell is 4 mm.

[0038] When in use, the power transmission component is first fixed to the frame by bolts, and the tool handle body can freely pass through the power transmission component and be installed on the machine tool. After the power transmission component is powered on, the power receiving component generates an induced current, which is connected to the data acquisition circuit board and converted into direct current. After the data acquisition circuit board is powered on, it supplies power to the vibration acquisition module and then starts to collect data. The collected data is stored in the data storage card, and the data can be exported from the data storage card periodically. If the data storage card is full or the system fails during use, the buzzer set on the data acquisition circuit board will sound an alarm.

[0039] Example 2

[0040] This embodiment is a tool handle with a built-in vibration sensor. The difference between this embodiment and embodiment 1 is that Fig. 9 As shown, the power transmission component also includes a signal receiving coil 211, which is arranged in the second housing, and the power reception component also includes a signal transmitting coil 311, which is arranged in the third housing, and the signal receiving coil is directly opposite to the signal transmitting coil. The vibration signal stored in the data acquisition circuit board can be wirelessly transmitted through the signal receiving coil and the signal transmitting coil, which is convenient for operation and use.

[0041] When in use, in addition to obtaining vibration data by means of a data storage card, data can also be obtained by wireless transmission. Fig. 9As shown, a signal receiving coil 211 is added to the power sending component, and a signal sending coil 311 is added to the power receiving component, and the signal sending coil is opposite to the signal receiving coil. During operation, the data acquisition circuit board provides power for coupling the signal sending coil and the signal receiving coil. The data acquisition circuit board changes the coupling frequency of the signal sending coil and the signal receiving coil according to the obtained vibration signal value, and obtains the current vibration signal value by identifying the frequency of the current in the signal receiving coil. The coupling frequency of the signal sending coil and the signal receiving coil is more than 10 times the coupling frequency of the power sending coil and the power receiving coil, and the magnetic field direction is the same when the two pairs of coils are coupled, so they will not affect each other.

[0042] As described above, the present invention can be better implemented. The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention; that is, all equivalent changes and modifications made according to the content of the present invention are covered by the scope of protection required by the claims of the present invention.

Claims

1. A tool handle with a built-in vibration sensor, characterized in that: It comprises a handle body, a data acquisition circuit board, a vibration acquisition component, a power receiving component and a power sending component. An inner hole is provided in the middle of the handle body. The data acquisition circuit board and the vibration acquisition component are installed in the inner hole. The power receiving component is arranged on the outer surface of the handle body. The power sending component is coaxially installed with the handle body. The power sending component and the power receiving component are arranged opposite to each other with a gap. The power sending component and the power receiving component perform wireless power transmission and supply power to the data acquisition circuit board. The vibration collection assembly includes a first shell, a spring, a vibration sensor and a vibration transmission member, the spring is installed in the middle of the first shell, both ends of the spring are provided with vibration sensors, the lead wires of the vibration sensor are connected to the data acquisition circuit board, the vibration transmission member includes a mounting platform and an input rod, the mounting platform is tightly fitted with the vibration sensor, and the input rod is in contact with the inner wall of the inner hole; The vibration collection assembly also includes an end cover matched with the first shell, a boss for positioning is provided on the outer side of the first shell, a groove is provided on the side wall of the first shell, and a convex block matched with the groove is provided on the circumference of the end cover; a rectangular groove and a first through hole located at the center of the rectangular groove are provided in the middle of the first shell, the spring, the vibration sensor and the vibration transmission member are all installed in the rectangular groove, the lead wire of the vibration sensor passes through the first through hole, and second through holes are provided on the side walls at both ends of the rectangular groove, and the input rod passes through the second through hole and is in close contact with the inner wall of the inner hole; A chuck and a nut are also provided at the rear end of the tool handle body, and a buzzer is also provided on the data acquisition circuit board.

2. A tool handle with a built-in vibration sensor according to claim 1, characterized in that: The handle body is also provided with a lead hole connected to the inner hole, and the power lines of the power receiving component and the data acquisition circuit board pass through the lead hole. The inner hole is provided with a circuit board mounting groove and two retaining ring mounting grooves. The circuit board mounting groove is parallel to the axis of the handle body, the data acquisition circuit board is arranged in the circuit board mounting groove, the two retaining ring mounting grooves are both perpendicular to the axis of the handle body, a retaining ring is arranged in each retaining ring mounting groove, and the vibration collection component is arranged between the two retaining rings.

3. The tool handle with a built-in vibration sensor according to claim 1, characterized in that: The data acquisition circuit board includes a data storage card, an A / D converter, a power conversion device and a central processing unit.

4. The tool handle with a built-in vibration sensor according to claim 1, characterized in that: The vibration sensor adopts a vibration acceleration sensor, and the vibration sensor is bonded on the mounting platform.

5. The tool handle with a built-in vibration sensor according to claim 1, characterized in that: The power sending component includes a second shell and a power sending coil arranged in the second shell, and the power receiving component includes a third shell and a power receiving coil arranged in the third shell. The third shell is provided with a third through hole, and the lead wire of the power receiving coil passes through the third through hole and is connected to the data acquisition circuit board. The power receiving coil and the power sending coil are arranged opposite to each other.

6. A tool handle with a built-in vibration sensor according to claim 5, characterized in that: The power transmitting coil is 4-5 mm longer than the power receiving coil; the gap between the inner surface of the second shell and the outer surface of the handle body is 2-5 mm, and the gap between the inner surface of the second shell and the outer surface of the third shell is 2-5 mm.

7. The tool handle with a built-in vibration sensor according to claim 5, characterized in that: The power sending component also includes a signal receiving coil, which is arranged in the second shell. The power receiving component also includes a signal sending coil, which is arranged in the third shell. The signal receiving coil is directly opposite to the signal sending coil.

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