Power tools and power tool systems

Abstract

The electric tool (1) includes a motor (4), an output shaft (7), and a power transmission mechanism (6) for transmitting the rotational output of the motor (4) to the output shaft (7). The motor control unit (12) controls the rotation of the motor (4) according to the user's operation of turning on the operating switch (9). The detection unit (20) detects physical quantity data during the rotation of the motor (4). The state determination unit (26) uses the physical quantity data to determine whether the electric tool (1) is in a degraded state. The notification unit (18) notifies that the electric tool (1) is in a degraded state when the motor (4) is not rotating.

Description

Technical Field

[0001] The present disclosure relates to a power tool and a system for managing the status of a power tool. Background Art

[0002] Patent document 1 discloses a work management device, which includes: a work information acquisition unit that acquires work information related to work content; a position information acquisition unit that acquires position information of a work site; a work object information acquisition unit that acquires work object information; and an information management unit that stores the work information, the position information, and the work object information in a storage unit in correspondence with each other. The work management device also includes a determination unit that determines whether the work is good or not based on design drawing data. The result of determining whether the work is good or not is displayed on the display unit.

[0003] [Prior art literature]

[0004] [Patent Document]

[0005] Patent Document 1: Japanese Patent Application Publication No. 2016-91316 Summary of the invention

[0006] [Problems to be solved by the invention]

[0007] If a malfunction occurs in the electric tool, it is difficult to accurately manage the tightening torque of threaded members such as screws and bolts. Therefore, it is necessary to evaluate the current state of the electric tool and appropriately notify the user of the evaluated state.

[0008] The present disclosure has been made in view of such circumstances, and an object of the present disclosure is to provide a technology for state management of an electric power tool.

[0009] [Technical solutions for solving technical problems]

[0010] To solve the above-mentioned problems, an electric tool of one embodiment of the present invention includes: a motor; an output shaft on which a front end tool can be installed; a power transmission mechanism that transmits the rotational output of the motor to the output shaft; an operating switch for rotating the motor; a motor control unit that controls the rotation of the motor according to the user's operation of turning on the operating switch; a detection unit that detects physical quantity data during the rotation of the motor; a state determination unit that uses the physical quantity data to determine whether the electric tool is in a degraded state; and a notification unit that notifies that the electric tool is in a degraded state when the motor is not rotating.

[0011] Another embodiment of the present invention is an electric tool system including an electric tool and a server system, wherein the electric tool has: an electric motor; an output shaft to which a front end tool can be mounted; a power transmission mechanism to transmit the rotational output of the electric motor to the output shaft; an operating switch for rotating the electric motor; a motor control unit to control the rotation of the electric motor according to the user's turning-on operation of the operating switch; a detection unit to detect physical quantity data during the rotation of the electric motor; and a tool-side sending unit to send the detected physical quantity data to the server system when the electric motor is not rotating. The server system has: a server-side receiving unit to receive the transmitted physical quantity data; a state determination unit to determine whether the electric tool is in a degraded state using the physical quantity data; and a server-side sending unit to send the determination data based on the state determination unit to the electric tool. The electric tool has: a tool-side receiving unit to receive the transmitted determination data; and a notification unit to notify that the electric tool is in a degraded state when the motor is not rotating.

[0012] Furthermore, any combination of the above-described constituent elements and any form of converting the present disclosure into a method, an apparatus, a system, a computer program, or a recording medium storing the computer program are also effective as forms of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a diagram showing the configuration of an electric tool system according to an embodiment.

[0014] Figure 2 It is a diagram showing functional blocks of the electric power tool according to the embodiment.

[0015] Figure 3 This is a diagram showing the functional blocks of a server system according to an embodiment.

[0016] Figure 4 It is a diagram showing an example of physical quantity data and time information.

[0017] Figure 5 FIG. 1 is a diagram showing another functional block of the electric power tool according to the embodiment. DETAILED DESCRIPTION

[0018] Figure 1 The structure of the power tool system 100 of the embodiment is shown. The power tool system 100 includes a power tool 1 and a server system 50. An access point (hereinafter referred to as "AP") 40 is interconnected with the power tool 1 as a wireless LAN client, and is connected to an external network 42 such as the Internet. A router 41 is connected to the server system 50 by wire, and is connected to the network 42. The power tool 1 and the server system 50 are communicatively connected via the network 42.

[0019] Figure 2The functional blocks of the electric tool 1 of the embodiment are shown. The electric tool 1 includes a housing 2, and a driving unit 3, a control unit 10, a communication unit 15, a notification unit 18, a storage unit 19, a detection unit 20, a clock 25, and a battery 30 are provided in the housing 2. The battery 30 is provided at the lower end side of the housing 2, and supplies power to each component of the electric tool 1. In addition, the lower end side of the housing 2 can also be formed as a battery pack separate from the tool body, and can be attached to and detached from the tool body. The clock 25 is a real-time clock, generates current date and time information, and provides it to the control unit 10.

[0020] The driving unit 3 includes a motor 4 as a driving source and a power transmission mechanism 6 connected to a motor shaft 5 of the motor 4, thereby driving an output shaft 7. The output shaft 7 is connected to a front tool loading unit 8, and a front tool such as a screwdriver that applies a tightening torque to a threaded member can be installed. The power transmission mechanism 6 is a mechanism that transmits the rotational output of the motor 4 to the output shaft 7. The power transmission mechanism 6 can have a planetary gear reduction mechanism that meshes with a pinion mounted on the motor shaft 5. The electric tool 1 of the embodiment is an impact rotation tool, and the power transmission mechanism 6 includes an impact mechanism that applies intermittent rotational impact force to the output shaft 7.

[0021] The detection unit 20 detects physical quantity data of the electric tool 1 during the rotation of the motor 4. The detection unit 20 may include a tightening torque detection unit 21, a current detection unit 22, a rotation speed detection unit 23, and a vibration detection unit 24. The tightening torque detection unit 21 detects the tightening torque of the threaded member. The tightening torque detection unit 21 may include a magnetic strain type torque sensor mounted on the output shaft 7 and a rotation angle sensor of the output shaft 7. The torque sensor detects the change in magnetic permeability corresponding to the axial strain generated by applying torque to the output shaft 7 through a coil set in a non-rotating part, and outputs a voltage signal corresponding to the strain. The rotation angle sensor outputs the rotation angle of the output shaft 7. The tightening torque detection unit 21 uses the voltage signal corresponding to the strain and the rotation angle of the output shaft 7 to calculate and output the tightening torque of the threaded member.

[0022] The current detection unit 22 detects the current supplied to the motor 4. The rotation speed detection unit 23 detects the rotation speed (rotation speed) of the motor 4. The rotation speed detection unit 23 may be a magnetic rotary encoder, a Hall element IC, or the like that detects the rotation angle of the motor 4. The vibration detection unit 24 detects the vibration generated in the housing 2. The vibration detection unit 24 may be a displacement sensor, a velocity sensor, or an acceleration sensor, and may also be formed by an electromagnetic element, a piezoelectric element, an electrostatic capacitance element, or the like.

[0023] The communication unit 15 includes a transmitting unit 16 and a receiving unit 17. The communication unit 15 may be a module for wirelessly communicating with the AP 40 based on a communication protocol such as the IEEE 802.11 protocol, for example. In addition, the communication unit 15 may also have a wireless communication function of the fourth generation mobile communication system. In addition, the communication unit 15 may not be a wireless communication module, but a module for wired communication with an external device via a USB cable or the like.

[0024] The notification unit 18 is an output interface for outputting information to the user. The notification unit 18 may include a speaker for outputting information by sound and / or a display for outputting information by screen. The storage unit 19 is a memory including a ROM (Read Only Memory) and a RAM (Random Access Memory). The ROM stores at least identification information (tool ID) for identifying the electric tool 1. The ROM also stores the control program used by the motor control unit 12. The RAM temporarily stores the information sent by the sending unit 16, and temporarily stores the information received by the receiving unit 17.

[0025] The main body of the electric tool or method disclosed in the present invention includes a computer. The computer executes a program to realize the function of the main body of the tool or method disclosed in the present invention. The computer has a processor that acts according to the program as a main hardware component. The type of the processor is not limited as long as it can realize the function by executing the program. The processor is composed of one or more electronic circuits including a semiconductor integrated circuit (IC) or LSI (large scale integration). Here, it is called IC or LSI, but the naming method changes according to the degree of integration, and it can also be an integrated circuit called system LSI, VLSI (very large scale integration) or ULSI (ultra large scale integration). A field programmable gate array (FPGA) that is programmed after manufacturing the LSI, or a reconfigurable logic device that can reconstruct the connection relationship inside the LSI or set the circuit division inside the LSI can also be used for the same purpose. Multiple electronic circuits can be integrated into one chip or provided in multiple chips. Multiple chips can be concentrated in one device or provided in multiple devices. The program is recorded in a non-transitory recording medium such as a computer-readable ROM, an optical disk, or a hard disk drive. The program may be stored in advance in the recording medium, or may be supplied to the recording medium via a wide area communication network including the Internet.

[0026] The control unit 10 is implemented by a computer mounted on a control substrate. The control unit 10 has a function of controlling the power tool 1 as a whole and performs various processes related to the power tool 1. The control unit 10 includes an acquisition unit 11, a motor control unit 12, a communication control unit 13, and a notification control unit 14. The motor control unit 12 controls the rotation of the motor 4.

[0027] The acquisition unit 11 acquires physical quantity data detected during the rotation of the motor 4. The physical quantity data detected during the rotation of the motor 4 may include at least the physical quantity data detected by the detection unit 20. That is, during the rotation of the motor 4, the acquisition unit 11 acquires the tightening torque value from the tightening torque detection unit 21, the motor current value from the current detection unit 22, the motor speed from the speed detection unit 23, and the vibration data from the vibration detection unit 24. The acquisition unit 11 associates the physical quantity data with time information related to the time when the physical quantity data is acquired, and stores the physical quantity data in the storage unit 19.

[0028] The time information corresponding to the physical quantity data may be absolute time information indicating the current time provided by the clock 25. Alternatively, the corresponding time information may be relative time information indicating the time elapsed from a reference time, such as a manufacturing date or a first use date. The storage unit 19 stores the physical quantity data and the time information related to the time when the physical quantity data was acquired in correspondence with each other.

[0029] An operating switch 9 operable by a user is provided on the front side of the handle portion of the housing 2. The operating switch 9 may be a trigger switch that can be pulled by the user to rotate the motor 4. The motor control unit 12 controls the rotation of the motor 4 according to the user's on-operation of the operating switch 9. Specifically, the motor control unit 12 controls the applied current of the motor 4 and adjusts the motor speed according to the operation amount of the operating switch 9. Before the operation starts, a target torque value based on this operation is set in the storage unit 19. The motor control unit 12 monitors the tightening torque value detected by the tightening torque detection unit 21, and automatically stops the rotation of the motor 4 if the tightening torque value reaches the target torque value. The tightening torque of the threaded member is managed by performing such control.

[0030] The communication control unit 13 controls the transmission operation performed by the transmission unit 16 and the reception operation performed by the reception unit 17. The communication unit 15 is connected to the server system 50 via the network 42. In the power tool system 100 of the embodiment, the communication control unit 13 transmits the detected physical quantity data and time information from the transmission unit 16 to the server system 50 when the motor 4 is not rotating.

[0031] During the rotation of the motor 4, vibration or noise is generated in the electric tool 1, and the communication environment may not be good. Therefore, when the motor 4 is not rotating, the transmission unit 16 transmits the physical quantity data and time information stored in the storage unit 19 to the server system 50. The transmission unit 16 preferably transmits the physical quantity data and time information obtained about one tightening operation to the server system 50 after the operation is completed.

[0032] Figure 3 The following is a functional block diagram of a server system 50 according to the embodiment. The server system 50 includes a communication unit 51, a state determination unit 54, a notification unit 55, and a storage device 56. The communication unit 51 includes a reception unit 52 and a transmission unit 53.

[0033] The server system 50 may be operated and managed by, for example, a manufacturing entity of the electric tool 1 . Figure 1 The server system 50 is shown as being connected to only one power tool 1, but the server system 50 is connected to a plurality of power tools 1 and receives physical quantity data and time information obtained from each power tool 1. In addition, in the power tool 1, the sending unit 16 sends the physical quantity data and time information to the server system 50 in correspondence with its own tool ID.

[0034] The receiving unit 52 receives the physical quantity data and time information transmitted by the electric tool 1. The storage device 56 stores the received physical quantity data and time information in association with the tool ID of the electric tool 1. The state determination unit 54 determines whether the electric tool 1 is in a degraded state using the received physical quantity data and time information.

[0035] The server system 50 may be composed of one or more processing devices. For example, the server system 50 may have a collection device for collecting physical quantity data sent by the power tool 1 and an evaluation device for evaluating the state of the power tool 1 using the collected physical quantity data. In this case, Figure 3 The communication unit 51 and the storage device 56 shown may be provided as components on the collection device side, and the state determination unit 54 and the notification unit 55 may be provided as components on the evaluation device side.

[0036] Figure 4 This shows an example of physical quantity data and time information received for one operation. Figure 4 , which shows the relationship between the tightening torque value and the vibration data in the physical quantity data. In this example, the change in the physical quantity data from the time (t1) when the tightening torque value exceeds 0 to the time (t2) when the tightening torque value reaches the target torque value (Tt [N·m]) and the rotation of the motor 4 stops automatically is shown.

[0037] The storage device 56 stores a plurality of sets of physical quantity data and time information obtained in each past operation in correspondence with the tool ID. If the receiving unit 52 receives the physical quantity data and time information corresponding to the tool ID, the state determination unit 54 reads the physical quantity data and time information corresponding to the same tool ID from the storage device 56, analyzes the time transition of the state of the electric tool 1, and determines whether the physical quantity data of this time indicates degradation.

[0038] Specifically, if the state determination unit 54 determines that the final tightening torque value is Tt [N·m] by referring to the data of the tightening torque value of this time, the physical quantity data of the final tightening torque value Tt [N·m] is determined from the physical quantity data stored in the past. The state determination unit 54 uses the change data of the tightening torque value of the most recent prescribed number of times (for example, 50 times) in the past to obtain the average time (Ts) from the time when the tightening torque value exceeds 0 to reach Tt [N·m]. For example, the state determination unit 54 may also calculate and store the average time Ts to reach the tightening torque in advance for each final tightening torque value.

[0039] The state determination unit 54 calculates the ratio (R) of the current arrival time (t2-t1) to the average time Ts by

[0040] R=(t2-t1) / Ts

[0041] To figure out.

[0042] The state determination unit 54 evaluates the state of the power tool 1 according to the R value, and evaluates the degree of degradation. When the R value is greater than a specified value (e.g., 1.25), the state determination unit 54 can determine that the power tool 1 is in a state of significant degradation. In addition, the degree of degradation can also be defined for multiple R values. In addition, the degree of degradation can also be evaluated based on the difference between the current arrival time (t2-t1) and the average time Ts.

[0043] The state determination unit 54 preferably determines the degraded part in the power tool 1 when determining that the power tool 1 is in a degraded state. In the embodiment, the tightening torque data, current data, motor speed data, and vibration data obtained at time t1 to t2 are sent from the power tool 1 as physical quantity data. When at least one of these physical quantity data indicates an abnormality, the state determination unit 54 determines the degraded part in the power tool 1. In addition, the normality and abnormality of the data can be determined by comparing with the data used as a reference, but for the same power tool 1, it can also be determined by comparing with the past physical quantity data stored in the storage device 56. The following shows several examples of determining the degraded part.

[0044] (Case 1)

[0045] When the current data is normal and the rotation speed data is abnormal, the state determination unit 54 determines that the motor 4 is not rotating normally and specifies that the deteriorated portion is the motor 4 .

[0046] (Case 2)

[0047] When the current data and the rotation speed data are normal, the state determination unit 54 determines that the motor 4 is normal. If the vibration data is abnormal, the state determination unit 54 determines that the power transmission mechanism 6 is vibrating, and identifies the power transmission mechanism 6 as the deteriorated part.

[0048] (Case 3)

[0049] If the current data and the rotation speed data are normal, the state determination unit 54 determines that the motor 4 is normal. If the tightening torque data is abnormal, the state determination unit 54 determines that an abnormality has occurred in the impact mechanism in the power transmission mechanism 6 and identifies the deteriorated portion as the impact mechanism.

[0050] In addition, the above examples 1 to 3 are merely examples, and the deteriorated portion can also be identified by other examples.

[0051] The notification unit 55 transmits the determination data indicating the determination result of the state determination unit 54 from the transmission unit 53 to the electric tool 1. The determination data includes data indicating that the electric tool 1 is in a degraded state and data indicating the determined degraded part. In addition, in the case where the state determination unit 54 does not determine that the electric tool 1 is degraded, the notification unit 55 does not need to transmit the determination data from the transmission unit 53. That is, the transmission unit 53 can transmit the determination data to the electric tool 1 only when the state determination unit 54 determines that the electric tool 1 is in a degraded state.

[0052] In the electric tool 1, the receiving unit 17 receives the sent judgment data. The notification control unit 14 notifies the judgment data from the notification unit 18. The notification unit 18 outputs the judgment result by voice from the speaker or by screen from the display. The user can know the deterioration of the electric tool 1 and the deterioration location based on the content notified by the notification unit 18, and can take corresponding measures such as sending the tool for repair if necessary.

[0053] When the motor 4 is not rotating, the notification control unit 14 notifies the power tool 1 of the degraded state and the degraded part through the notification unit 18. Since the rotation of the motor 4 is a tightening operation, the user may not notice it even if the notification unit 18 notifies. On the other hand, the judgment result indicating the degraded state is preferably notified to the user quickly. Therefore, if the motor 4 is not rotating when the receiving unit 17 receives the judgment data, the notification control unit 14 quickly outputs the judgment result from the notification unit 18. In addition, if the motor 4 is rotating when the receiving unit 17 receives the judgment data, the notification control unit 14 quickly outputs the judgment result from the notification unit 18 after the rotation of the motor 4 ends. In this way, by controlling the notification timing by the notification control unit 14, the user can reliably know that the power tool 1 is in a degraded state.

[0054] The notification control unit 14 can notify the power tool 1 of the deteriorated state and deteriorated location through the notification unit 18 when the operating switch 9 is not turned on. The motor control unit 12 of the embodiment automatically stops the rotation of the motor 4 when the tightening torque value reaches the target torque value. Thereafter, the user performs a disconnection operation on the operating switch 9 to remove the front end tool from the workpiece. At a timing just after the user performs a disconnection operation on the operating switch 9, the notification unit 18 notifies the power tool 1 of the deteriorated state and deteriorated location, so that the user can reliably obtain information related to the degradation.

[0055] In the above, a case where the server system 50 determines the deterioration of the electric tool 1 in the electric tool system 100 has been described. Hereinafter, a case where the electric tool 1 itself determines the deterioration of the electric tool 1 will be described.

[0056] Figure 5 Another functional block of the electric tool 1a of the embodiment is shown. The electric tool 1a includes: a driving unit 3, a control unit 10, a communication unit 15, a notification unit 18, a storage unit 19, a detection unit 20, a clock 25 and a battery 30. The clock 25 is a real-time clock that generates current date and time information and provides it to the control unit 10. Figure 2 The electric tool 1 and Figure 5 In the electric tool 1a shown in the figure, the components marked with the same reference numerals have the same functions. Therefore, the description of the components marked with the same reference numerals in the electric tool 1a will be appropriately omitted. Figure 2 The difference between the electric tool 1 shown is that Figure 5 The electric power tool 1a shown includes a state determination unit 26 having a function of determining the degree of deterioration by itself.

[0057] The driving unit 3 includes a motor 4, an output shaft 7 to which a tip tool can be mounted, and a power transmission mechanism 6 for transmitting the rotation output of the motor 4 to the output shaft 7. The motor control unit 12 controls the rotation of the motor 4 according to the user's on-operation of the operation switch 9. The detection unit 20 detects the physical quantity data of the electric tool 1a during the rotation of the motor 4. The acquisition unit 11 acquires the physical quantity data detected during the rotation of the motor 4, and stores the physical quantity data and the time information related to the time when the physical quantity data is acquired in the storage unit 19 in correspondence.

[0058] In the above-described electric tool 1a, the control unit 10 includes a state determination unit 26. The state determination unit 26 reads the physical quantity data and time information from the storage unit 19, and determines whether the current physical quantity data of the electric tool 1 indicates degradation. In addition, when the state determination unit 26 determines that the electric tool 1 is in a degraded state, it specifies the degraded part in the electric tool 1.

[0059] The degradation determination and identification of the degradation site by the state determination unit 26 may be the same as the degradation determination and identification of the degradation site described with respect to the state determination unit 54 in the server system 50. In addition, with respect to the electric tool 1, it is described that the state determination unit 54 can identify the degradation site in the electric tool 1 when at least one of the physical quantity data indicates an abnormality. It is described that the normality or abnormality of the data can be determined by comparing with the data serving as a reference, but in the electric tool 1, the state determination unit 26 may also provide the reference data for comparison from the server system 50. In addition, the state determination unit 26 may also compare with the past physical quantity data stored in the storage unit 19 to determine the normality or abnormality of the current physical quantity data. The state determination unit 26 may also determine the normality or abnormality of each of the current physical quantity data and identify the degradation site according to the references of the above-mentioned cases 1 to 3.

[0060] When the motor 4 is not rotating, the notification control unit 14 notifies the notification unit 18 that the power tool 1 is in a degraded state. In addition, when the state determination unit 26 determines the degraded part in the power tool 1, the notification control unit 14 may also simultaneously notify the degraded state and the degraded part of the power tool 1 from the notification unit 18. Since the rotation of the motor 4 is a tightening operation, sometimes the user will not notice it even if the notification unit 18 notifies. By notifying the user of the information about the degradation when the motor 4 is not rotating, the user can know that the power tool 1 is in a degraded state. In addition, when the state determination unit 26 does not determine that the power tool 1 is degraded, the notification unit 18 may not notify the determination result.

[0061] The notification control unit 14 can notify the power tool 1 of the deteriorated state and deteriorated location through the notification unit 18 when the operating switch 9 is not turned on. The motor control unit 12 of the embodiment automatically stops the rotation of the motor 4 when the tightening torque value reaches the target torque value. Thereafter, the user performs a disconnection operation on the operating switch 9 to remove the front end tool from the workpiece. At a timing just after the user performs a disconnection operation on the operating switch 9, the notification unit 18 notifies the power tool 1 of the deteriorated state and deteriorated location, so that the user can reliably obtain information related to the degradation.

[0062] The present disclosure is described above based on the embodiments. Those skilled in the art should understand that the embodiments are merely illustrative, and the combination of its constituent elements or processing processes may have various variations, and such variations are also included in the scope of the present disclosure. The detection unit 20 may also include a temperature detection unit for detecting temperature and a sound detection unit for detecting sound.

[0063] In the power tool 1 , the communication control unit 13 transmits the detected physical quantity data and time information from the transmission unit 16 to the server system 50 when the motor 4 is not rotating. However, the transmission may be performed when the power tool 1 is turned on or off.

[0064] In the embodiment, since the power tool 1a determines the degree of degradation itself, the transmitter 16 of the power tool 1a does not transmit the detected physical quantity data to the server system 50. In a modified example, the transmitter 16 of the power tool 1a may transmit the detected physical quantity data and the determination result to the server system 50.

[0065] The outline of the aspects of the present disclosure is as follows.

[0066] An electric tool (1) of one embodiment of the present invention may include: a motor (4); an output shaft (7) on which a front end tool can be mounted; a power transmission mechanism (6) that transmits the rotational output of the motor to the output shaft; an operating switch (9) for rotating the motor; a motor control unit (12) that controls the rotation of the motor according to the user's operation of turning on the operating switch; a detection unit (20) that detects physical quantity data during the rotation of the motor; a state determination unit (26) that uses the physical quantity data to determine whether the electric tool is in a degraded state; and a notification unit (18) that notifies that the electric tool is in a degraded state when the motor is not rotating.

[0067] Preferably, the notification unit (18) notifies that the electric tool is in a degraded state when the operating switch is not turned on. Preferably, the state determination unit (26) determines that the electric tool is in a degraded state, identifies the degraded part of the electric tool, and the notification unit (18) notifies the identified part.

[0068] Another embodiment of the electric tool system (100) disclosed herein includes an electric tool (1) and a server system (50). The electric tool (1) may include: an electric motor (4); an output shaft (7) on which a front end tool may be mounted; a power transmission mechanism (6) that transmits the rotational output of the electric motor to the output shaft; an operating switch (9) for rotating the electric motor; a motor control unit (12) that controls the rotation of the electric motor according to the user's operation of turning on the operating switch; a detection unit (20) that detects physical quantity data during the rotation of the electric motor; and a tool-side sending unit (16) that sends the detected physical quantity data to the server system when the electric motor is not rotating. The server system (50) may include: a server-side receiving unit (52) that receives the sent physical quantity data; a state determination unit (54) that uses the physical quantity data to determine whether the electric tool is in a degraded state; and a server-side sending unit (53) that sends the determination data based on the state determination unit to the electric tool (1). The electric tool (1) may include: a tool-side receiving unit (17) for receiving the transmitted determination data; and a notification unit (18) for notifying that the electric tool is in a deteriorated state when the motor is not rotating.

[0069] Preferably, the notification unit (18) notifies that the electric tool is in a degraded state when the operating switch is not turned on. Preferably, when the state determination unit (54) determines that the electric tool is in a degraded state, it identifies the degraded part of the electric tool, and the notification unit (18) notifies the identified part.

[0070] [Industrial Applicability]

[0071] The present disclosure can be used in the field of managing power tools and the status of power tools.

[0072] [Explanation of Reference Numerals]

[0073] 1. 1a…electric tool, 3…driving unit, 4…motor, 5…motor shaft, 6…power transmission mechanism, 7…output shaft, 9…operating switch, 10…control unit, 11…acquisition unit, 12…motor control unit, 13…communication control unit, 14…notification control unit, 15…communication unit, 16…transmission unit, 17…reception unit, 18…notification unit, 19…storage unit, 20…detection unit, 26…status determination unit, 50…server system, 51…communication unit, 52…reception unit, 53…transmission unit, 54…status determination unit, 55…notification unit, 56…storage device, 100…electric tool system.

Claims

1. An electric tool, characterized in that: include: Electric motor, Output shaft for mounting front end tools, A power transmission mechanism for transmitting the rotation output of the motor to the output shaft, an operating switch for rotating the motor, a motor control unit for controlling the rotation of the motor in response to a user's turning-on operation of the operation switch; a detection unit for detecting physical quantity data during the rotation of the motor, a state determination unit for determining whether the electric power tool is in a degraded state using the physical quantity data, and a notification unit for notifying that the electric power tool is in a deteriorated state when the electric motor is not rotating; Here, if the motor is rotating, the notification unit promptly notifies that the electric power tool is in a deteriorated state after the user releases the on operation of the operation switch.

2. The electric tool according to claim 1, characterized in that: The notification unit notifies that the electric power tool is in a deteriorated state when the operation switch is not turned on.

3. The electric tool according to claim 1 or 2, characterized in that: The state determination unit determines the deteriorated part of the electric tool when determining that the electric tool is in a deteriorated state; The notifying unit notifies the determined location.

4. An electric tool system comprising an electric tool and a server system, characterized in that: The electric tool has: Electric motor, Output shaft for mounting front end tools, A power transmission mechanism for transmitting the rotation output of the motor to the output shaft, an operating switch for rotating the motor, a motor control unit for controlling the rotation of the motor in response to a user's turning-on operation of the operation switch; a detection unit for detecting physical quantity data during the rotation of the motor, and When the motor is not rotating, transmitting the detected physical quantity data to a tool-side transmitting unit of the server system; The server system has: a server-side receiving unit receiving the transmitted physical quantity data, a state determination unit for determining whether the electric power tool is in a degraded state using the physical quantity data, and sending the determination data of the state determination unit to a server-side sending unit of the electric tool; The electric tool has: a tool-side receiving unit for receiving the transmitted determination data, and a notification unit for notifying that the electric power tool is in a deteriorated state when the electric motor is not rotating; Among them, if the motor is not rotating when the tool side receiving unit receives the judgment data, the notification unit quickly notifies that the power tool is in a degraded state; if the motor is rotating when the tool side receiving unit receives the judgment data, the notification unit quickly notifies that the power tool is in a degraded state after the user releases the on operation of the operating switch.

5. The electric tool system according to claim 4, characterized in that: The notification unit notifies that the electric power tool is in a deteriorated state when the operation switch is not turned on.

6. The electric tool system according to claim 4 or 5, characterized in that: The state determination unit determines the deteriorated part of the electric tool when determining that the electric tool is in a deteriorated state; The notifying unit notifies the determined location.

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