Electric tool system

Abstract

The purpose of the present disclosure is to provide an electric tool system capable of accurately determining a state of a tool body. An electric tool system (100) is provided with a tool body (1), a stabilization unit (2), and a notification unit (3). The tool body (1) has an output shaft (12), a transmission mechanism (13), a determination unit (14), an acquisition unit (15), and a housing (17). The determination unit (14) determines the state of the tool body (1). The acquisition unit (15) acquires acquisition data (D1) for the determination unit (14) to determine the state of the tool body (1). The notification unit (3) notifies a determination result of the determination unit (14). The stabilization unit (2) is configured to be attachable to a rotating member (X1) that is at least one of a motor (11), the transmission mechanism (13), and the output shaft (12). The stabilization unit (2) is fixed to the housing (17) in a state of being attached to the rotating member (X1).

Description

Power Tool System

[0001] The present disclosure relates generally to a power tool system, and more particularly to a power tool system that determines the condition of a tool body.

[0002] Patent Document 1 discloses a power tool diagnostic system comprising a power tool and a tool holder. The power tool includes a memory for storing the work history of the power tool and a tool communication unit for transmitting the work history data stored in the memory. The tool holder includes a tool communication unit for receiving data from the tool communication unit, a diagnostic unit for determining deterioration and / or failure of the power tool based on the received data, and a display unit for displaying the diagnostic results of the diagnostic unit.

[0003] In a power tool system such as the diagnostic system described in Patent Document 1, the condition of the power tool (tool body) varies greatly depending on how each user uses the power tool, so it may not be possible to accurately determine the condition of the power tool.

[0004] JP 2009-83043 A

[0005] An object of the present disclosure is to provide a power tool system that can accurately determine the condition of the tool body.

[0006] A power tool system according to one aspect of the present disclosure includes a tool body, a stabilizing unit, and an alarm unit. The tool body has an output shaft, a transmission mechanism, a determination unit, an acquisition unit, and a housing. The output shaft rotates by power from a motor. The transmission mechanism transmits the power of the motor to the output shaft. The determination unit determines the state of the tool body. The acquisition unit acquires acquired data for the determination unit to determine the state of the tool body. The housing accommodates the motor, the transmission mechanism, and at least a portion of the output shaft. The alarm unit notifies the determination result of the determination unit. The stabilizing unit is configured to be attachable to a rotating member that is at least one of the motor, the transmission mechanism, and the output shaft. The stabilizing unit is fixed to the housing when attached to the rotating member.

[0007] FIG. 1 is a block diagram showing a schematic configuration of a power tool system according to this embodiment. FIG. 2A is an external perspective view of the power tool system as viewed from the front. FIG. 2B is an enlarged view of a main portion of the power tool system in the range R1 shown in FIG. 2A. FIG. 3 is a schematic configuration diagram showing a tool main body as viewed from the front. FIG. 4 is an exploded perspective view of the power tool system as viewed from the rear. FIG. 5 is an external perspective view of a first portion of a housing in the stabilizing section as viewed from the rear. FIG. 6 is an external perspective view of a second portion of a housing in the stabilizing section as viewed from the rear. FIG. 7 is a block diagram showing a schematic configuration of a power tool system according to a first modified example of the power tool system. FIG. 8 is a block diagram showing a schematic configuration of a power tool system according to another modified example of the power tool system when a notification unit notifies a user of the determination unit of a result of the determination unit in a manner that can be audibly recognized by a user of the tool main body. FIG. 9 is a block diagram showing a schematic configuration of a power tool system according to another modified example of the power tool system when a notification unit notifies a user of the determination unit of a result of the determination unit in a manner that can be tactilely recognized by a user of the tool main body. FIG. 10 is a block diagram showing a schematic configuration of a power tool system according to another modified example of the above embodiment, in which the tool main body has a communication unit.

[0008] (Embodiment) (1) Overview Hereinafter, an overview of a power tool system 100 according to this embodiment will be described with reference to FIGS. 1 to 3. FIG.

[0009] As shown in FIGS. 1 and 2A, the power tool system 100 according to this embodiment includes a tool body 1, a stabilizing unit 2, and a notifying unit 3.

[0010] The tool body 1 is assumed to be an electric screwdriver used by a user for tightening a fastening part (bolt, screw, nut, etc.) to a tightening object (electrical appliance, furniture, etc.). The tool body 1 may also be an electric screwdriver used for loosening a fastening part from a tightening object. The "user" in this disclosure refers to a user of the tool body 1, for example, a worker who performs the tightening work.

[0011] As shown in FIG. 1 , the tool body 1 has an output shaft 12, a transmission mechanism 13, a determination unit 14, an acquisition unit 15, and a housing 17. The output shaft 12 rotates by the power of the motor 11. The transmission mechanism 13 transmits the power of the motor 11 to the output shaft 12. The determination unit 14 determines the state of the tool body 1. In the present disclosure, the "state of the tool body 1" refers to the extent of wear or deterioration of the tool body 1, in other words, the wear or deterioration state of the tool body 1. In other words, the determination unit 14 determines the extent of wear or deterioration of the tool body 1. The acquisition unit 15 acquires acquired data D1 that the determination unit 14 uses to determine the state of the tool body 1. The housing 17 accommodates at least a portion of the motor 11, the transmission mechanism 13, and the output shaft 12.

[0012] As shown in Fig. 2A , the stabilizing unit 2 is configured to be attachable to a rotating member X1, which is at least one of the motor 11, the transmission mechanism 13, and the output shaft 12. The stabilizing unit 2 is fixed to a housing 17 while attached to the rotating member X1. The "rotating member X1" in this disclosure refers to a member involved in the rotational movement of the tool bit B1 (see Fig. 3 ) in the tool body 1, that is, a member that rotates together with the tool bit B1 in the tool body 1. The notifying unit 3 notifies the result of the determination by the determining unit 14.

[0013] In a power tool system without a stabilization unit (hereinafter referred to as a "comparative power tool system"), the determination unit may acquire data for determining the condition of the tool body during actual tightening operations. For example, the comparative power tool system may acquire the number of actual tightening operations as acquired data and determine the condition of the tool body based on the acquired data. In the case of the comparative power tool system described above, even if the number of actual tightening operations is the same, the load state may vary significantly depending on how the power tool is used by each user, and the condition of the tool body may not be determined accurately.

[0014] However, in the power tool system 100 of this embodiment, the stabilizing unit 2 is fixed to the housing 17 while attached to the rotating member X1. This prevents the load state applied to the rotating member X1 from changing depending on the user while the acquisition unit 15 is acquiring the acquired data D1. In other words, in the power tool system 100 of this embodiment, the load applied to the rotating member X1 while the acquisition unit 15 is acquiring the acquired data D1 can be kept constant and independent of the user. As a result, the determination unit 14 can accurately determine the state of the tool body 1. In other words, the power tool system 100 of this embodiment has the advantage of being able to accurately determine the state of the tool body 1.

[0015] (2) Detailed Configuration (2-1) Power Tool System Hereinafter, the detailed configuration of the power tool system 100 of this embodiment will be described with reference to FIGS. 1 to 2B.

[0016] In the following description, as shown in FIG. 2A , the axial direction of the output shaft 12 of the tool body 1 (described later) is defined as the front-to-rear direction. The side of the stabilizing unit 2 (described later) viewed from the tool body 1 is defined as the front, and the side of the tool body 1 (described later) viewed from the stabilizing unit 2 is defined as the rear. The direction in which the main body 171 (described later) and the grip unit 172 (described later) are aligned in the tool body 1 is defined as the up-down direction. The main body 171 side (viewed from the grip unit 172) is defined as the top, and the grip unit 172 side (viewed from the main body 171) is defined as the bottom. The direction perpendicular to the front-to-rear direction and the up-to-down direction is defined as the left-to-right direction. However, these definitions are not intended to define the direction in which the power tool system 100 is used.

[0017] 1 and 2A, the power tool system 100 includes a tool body 1, a stabilizing unit 2, and a notifying unit 3. In this embodiment, the notifying unit 3 is provided in the tool body 1, as shown in FIG.

[0018] (2-2) Tool Body (2-2-1) Overall Configuration The detailed structure of the tool body 1 of this embodiment will be described below with reference to FIGS. 1 to 3. FIG.

[0019] 1 and 3 , the tool body 1 includes a motor 11, an output shaft 12, a transmission mechanism 13, a determination unit 14, an acquisition unit 15, a drive control unit 16, a housing 17, and an operation unit 19. The tool body 1 of this embodiment is a rotary impact tool.

[0020] The tool body 1 preferably includes a computer system. The computer system is primarily comprised of a processor and memory as hardware. The processor executes a program stored in the computer system's memory to realize at least some of the functions of the determination unit 14, the acquisition unit 15, and the drive control unit 16 in the present disclosure. The computer system primarily includes a processor that operates according to the program. The type of processor is not important as long as it can realize the functions by executing the program. The processor may be comprised of one or more electronic circuits, including a semiconductor integrated circuit (IC) or a large-scale integration (LSI). While ICs and LSIs are used here, the names may vary depending on the degree of integration, and may also be referred to as system LSIs, very large-scale integrations (VLSIs), or ultra-large-scale integrations (ULSIs). Field-programmable gate arrays (FPGAs), which are programmed after the LSI is manufactured, or reconfigurable logic devices that can reconfigure the connections within the LSI or set up circuit partitions within the LSI, can also be used for the same purpose. The electronic circuits may be integrated on a single chip or may be provided on multiple chips, and the multiple chips may be integrated into a single device or may be provided on multiple devices.

[0021] (2-2-2) Housing As shown in Fig. 1, the housing 17 accommodates the motor 11, at least a portion of the output shaft 12, the transmission mechanism 13, the determination unit 14, the acquisition unit 15, and the drive control unit 16. As shown in Figs. 2A and 3, the housing 17 has a main body 171, a grip 172, and a battery attachment unit 173.

[0022] 2A and 3, the main body 171 is cylindrical with both ends closed. The axial direction of the main body 171 is along the front-rear direction. As shown in FIG. 3, the main body 171 of this embodiment houses the motor 11, at least a portion of the output shaft 12, and the transmission mechanism 13.

[0023] The main body 171 has a through hole 1711 formed in the front-rear direction on an end face (front surface). The through hole 1711 is provided at the center of the end face of the main body 171. The output shaft 12 is inserted through the through hole 1711. The front portion of the output shaft 12 protrudes from the through hole 1711 of the main body 171. In other words, the front portion of the output shaft 12 is exposed to the outside of the housing 17.

[0024] (Grip Portion) The grip portion 172 protrudes from the main body portion 171. More specifically, as shown in Figures 2A and 3, the grip portion 172 protrudes downward from the main body portion 171. A user can grasp the grip portion 172 to perform work such as tightening a screw.

[0025] (Battery Mounting Portion) The battery mounting portion 173 is shaped like a rectangular parallelepiped. As shown in FIG. 2A , the battery mounting portion 173 is connected to the lower end of the grip portion 172. A rechargeable battery pack A1 (see FIG. 3 ) is detachably attached to the battery mounting portion 173. The tool body 1 operates using the battery pack as a power source. That is, the battery pack A1 is a power source that supplies current to drive the motor 11. The battery pack A1 is not a component of the tool body 1. However, the tool body 1 may be equipped with the battery pack A1. The battery pack A1 includes a battery pack configured by connecting multiple secondary batteries (e.g., lithium ion batteries) in series and a case that houses the battery pack.

[0026] (2-2-3) Motor As shown in Fig. 3, the motor 11 is housed in the rear part of the main body 171 of the housing 17. The motor 11 includes a rotor having a rotating shaft and a permanent magnet, and a stator having a coil. Electromagnetic interaction between the permanent magnet and the coil causes the rotor to rotate relative to the stator.

[0027] The motor 11 is a servo motor. The torque and rotation speed of the motor 11 change according to control by the drive control unit 16 (servo driver). More specifically, the drive control unit 16 controls the operation of the motor 11 by feedback control, which controls the torque and rotation speed of the motor 11 so as to approach target values. In this disclosure, the "rotation speed of the motor 11" refers to the rotational speed of the motor 11.

[0028] (2-2-4) Transmission Mechanism The transmission mechanism 13 is a mechanism that transmits the power of the motor 11 to the output shaft 12. As shown in FIG. 3 , the transmission mechanism 13 is housed in the main body 171 of the housing 17. The transmission mechanism 13 of this embodiment has an impact mechanism. That is, the tool body 1 of this embodiment is an electric impact power tool that performs a tightening operation while performing an impact operation using the impact mechanism. During the impact operation, the impact mechanism generates an impact force based on the power of the motor 11, and the impact force acts on the tool bit B1 (see FIG. 3 ).

[0029] As shown in FIG. 3 , the transmission mechanism 13 includes a speed reducing mechanism 131 , a drive shaft 132 , a hammer 133 , an anvil 134 , and an elastic member 135 .

[0030] The drive shaft 132 is mechanically connected to the rotating shaft of the motor 11 via a reduction mechanism 131. The reduction mechanism 131 converts the rotation speed and torque of the rotating shaft of the motor 11 into the rotation speed and torque required for screw turning. The torque of the rotating shaft of the motor 11 is transmitted to the drive shaft 132 via the reduction mechanism 131. As a result, the drive shaft 132 rotates. The drive shaft 132 is what is called a spindle.

[0031] The hammer 133 is fitted onto the outer periphery of the drive shaft 132 so as to be movable in the axial direction (front-rear direction) of the drive shaft 132 and rotatable in the rotational direction of the drive shaft 132. When the rotational force of the drive shaft 132 is transmitted to the hammer 133, the hammer 133 rotates integrally with the drive shaft 132 in the rotational direction of the drive shaft 132.

[0032] The elastic member 135 is disposed between the reduction mechanism 131 and the hammer 133. A force is applied to the hammer 133 by the elastic member 135 toward the anvil 134 side (front side) along the axial direction (front-rear direction) of the drive shaft 132. In other words, the hammer 133 is biased by the elastic member 135 toward the anvil 134 side along the axial direction of the drive shaft 132. The elastic member 135 in this embodiment is, for example, a conical coil spring.

[0033] The anvil 134 has an engagement portion that engages with the hammer 133 in the rotational direction. When the hammer 133 and the anvil 134 are engaged with each other, the rotational force of the hammer 133 is transmitted to the anvil 134. This causes the anvil 134 to rotate.

[0034] The output shaft 12 of this embodiment is formed integrally with the anvil 134. As shown in Figure 4, a holding portion 121 is provided at the tip of the output shaft 12. The output shaft 12 transmits the rotational force of the anvil 134 to the holding portion 121.

[0035] The holding portion 121 holds the tool bit B1. More specifically, the tool bit B1 is detachably attached to the holding portion 121. In this embodiment, the output shaft 12 and the tool bit B1 rotate together with the anvil 134.

[0036] The tool bit B1 is, for example, a socket or a driver bit. The tool bit B1 is fitted to a fastening part. When the tool bit B1 is rotated while fitted to the fastening part, it becomes possible to perform an operation such as tightening the fastening part. In this embodiment, the tool bit B1 is not included in the configuration of the tool body 1. However, the tool bit B1 may be included in the configuration of the tool body 1.

[0037] (2-2-5) Operation Unit As shown in FIGS. 2A and 3, the operation unit 19 protrudes from the grip portion 172. The operation unit 19 accepts operations for controlling the rotation of the rotary shaft of the motor 11. By pulling the operation unit 19, it is possible to switch the motor 11 on and off. In addition, the rotation speed of the rotary shaft can be adjusted by the amount of pulling the operation unit 19. The greater the amount of pulling, the faster the rotation speed of the rotary shaft.

[0038] (2-2-6) Drive Control Unit The drive control unit 16 rotates or stops the rotary shaft of the motor 11 and also controls the rotation speed of the rotary shaft depending on the pulling amount of the operation of pulling the operating unit 19. In this embodiment, as shown in FIG. 3 , the drive control unit 16 is housed in the grip portion 172 of the housing 17.

[0039] The drive control unit 16 includes, for example, a microcontroller. The drive control unit 16 can change the rotation speed of the output shaft 12 and the tool bit B1 by changing the rotation speed of the rotation shaft of the motor 11. The drive control unit 16 changes the rotation speed of the rotation shaft of the motor 11, for example, by changing the power supplied to the motor 11.

[0040] (2-2-7) Acquisition Unit The acquisition unit 15 acquires acquisition data D1 (see FIG. 1) for the determination unit 14 to determine the state of the tool body 1. More specifically, the acquisition unit 15 acquires acquisition data D1 used by the determination unit 14 to determine the extent to which the tool body 1 has worn or deteriorated.

[0041] The acquisition unit 15 acquires the acquired data D1 while the stabilizing unit 2 is attached to the output shaft 12 (details will be described in the section "(2-3) Stabilizing Unit"). Specifically, the user pulls the operation unit 19 while the stabilizing unit 2 is attached to the output shaft 12, causing the acquisition unit 15 to acquire the acquired data D1. The acquisition unit 15 has a function of detecting that the stabilizing unit 2 has been attached to the output shaft 12, and may acquire the acquired data D1 after detecting that the stabilizing unit 2 has been attached to the output shaft 12. For example, the tool body 1 may include a switch configured to be pressed by the stabilizing unit 2 when the stabilizing unit 2 is attached to the output shaft 12, and the acquisition unit 15 may acquire the acquired data D1 when the switch is pressed by the stabilizing unit 2.

[0042] If the tool body 1 is worn or deteriorated, it is expected that the power required for the drive control unit 16 to control the rotation shaft of the motor 11 to the target rotation speed will change. For this reason, the acquisition unit 15 of this embodiment acquires, as the acquired data D1, current data related to the current value of the power supplied to the motor 11 by the drive control unit 16 to control the rotation shaft of the motor 11 to the target rotation speed.

[0043] The acquisition unit 15 of this embodiment includes a rotation speed detection unit 151 and a current detection unit 152 .

[0044] The rotation speed detection unit 151 detects the rotation speed of the rotating shaft of the motor 11. More specifically, the rotation speed detection unit 151 detects the rotation speed of a rotor having a rotating shaft in the motor 11. One example of the rotation speed detection unit 151 is a magnetic sensor such as a Hall element provided in the motor 11. The magnetic sensor detects the magnetic field generated by the rotor of the motor 11 and detects the rotation angle of the rotor based on the timing at which the polarity of the detected magnetic field switches.

[0045] The current detection unit 152 detects the value of the current required to control the rotation speed of the rotary shaft of the motor 11. More specifically, the current detection unit 152 detects the current value of the power supplied to the motor 11 by the drive control unit 16.

[0046] The acquisition unit 15 outputs the detection results of the rotation speed detection unit 151 and the current detection unit 152 to the determination unit 14 as acquired data D1.

[0047] (2-2-8) Determination Unit The determination unit 14 determines the state of the tool body 1 based on the acquired data D1 output from the acquisition unit 15. More specifically, the determination unit 14 determines the extent to which the tool body 1 has worn or deteriorated based on the acquired data D1 output from the acquisition unit 15.

[0048] As an example, the determination unit 14 of this embodiment determines the state of the tool body 1 based on the acquired data D1 in accordance with changes in the current value of the power supplied to the motor 11 by the drive control unit 16 to control the rotation shaft of the motor 11 to a target rotation speed. More specifically, the determination unit 14 of this embodiment determines the state of the tool body 1 in accordance with changes in the value of the average current or peak current of the power supplied to the motor 11 by the drive control unit 16.

[0049] More specifically, the determination unit 14 of this embodiment uses a trained model based on machine learning to determine the state of the tool body 1 by classifying it into one of “normal,” “deteriorated,” and “end-stage.” The trained model described above is configured to output one of “normal,” “deteriorated,” and “end-stage” states of the tool body 1 when current data related to the current value of the power supplied to the motor 11 by the drive control unit 16 to control the rotational shaft of the motor 11 to a target rotation speed is input. Here, “normal” refers to a state in which the tool body 1 is hardly worn or deteriorated and does not need to be replaced, and “end-stage” refers to a state in which the tool body 1 is worn or deteriorated and needs to be replaced. Furthermore, “deteriorated” refers to a state of the tool body 1 between “normal” and “end-stage.”

[0050] The determination unit 14 outputs the determination result to the notification unit 3. More specifically, the determination unit 14 outputs to the notification unit 3 whether the state of the tool body 1 has been classified as “normal”, “deteriorated”, or “end of life”.

[0051] (2-3) Stabilizing Unit (2-3-1) Overall Configuration As shown in Fig. 2A, the stabilizing unit 2 of this embodiment is configured to be attachable to the output shaft 12, which is the rotating member X1. More specifically, the stabilizing unit 2 of this embodiment is configured to be attachable to a portion (front portion) of the output shaft 12 that is exposed to the outside of the housing 17. When attached to the output shaft 12, the stabilizing unit 2 is fixed to the main body 171 of the housing 17. In other words, the rotating member X1 to which the stabilizing unit 2 is attached is the output shaft 12.

[0052] The stabilizing unit 2 of this embodiment is provided on the outside of the housing 17 of the tool body 1. More specifically, the stabilizing unit 2 of this embodiment is detachably provided on the front portion of the main body 171 of the housing 17 of the tool body 1. This configuration has the advantage that the tool body 1 can be made smaller than when the stabilizing unit 2 is provided inside the housing 17.

[0053] As shown in Figures 2A and 4, the stabilization section 2 of this embodiment has a load section 21, a housing 22, a bolt 23, a plurality (four) of first screws 24, and a plurality (four) of second screws 25.

[0054] (2-3-2) Housing The housing 22 rotatably accommodates at least a portion of the load section 21 (the socket section 211 and a portion of the shaft section 212, which will be described later). The housing 22 is rectangular box-shaped. The housing 22 is made of aluminum. As shown in FIG. 2A , the housing 22 has a first section 221, a second section 222, and a third section 223. The first section 221 and the second section 222 are each a rectangular plate member. The third section 223 is a U-shaped plate member when viewed from the front-to-rear direction. Note that in FIG. 2A , the housing 22 is shown with a two-dot chain line to show how the stabilization section 2 is attached to the output shaft 12.

[0055] The first surface (front surface) of the first portion 221 is provided with an insertion hole 2212 through which the load portion 21 (the shaft portion 212) is inserted. As shown in FIG. 4 , the shape of the front side of the insertion hole 2212 matches the shape of the bolt 23 when viewed from the front-rear direction. In the illustrated example, since the bolt 23 is hexagonal, the shape of the front side of the insertion hole 2212 is also hexagonal. The bolt 23 is accommodated in the front side of the insertion hole 2212. On the other hand, as shown in FIG. 5 , the shape of the rear side of the insertion hole 2212 is a circle that is slightly larger than the shape of the shaft portion 212 of the load portion 21 when viewed from the front-rear direction. As shown in FIG. 5 , the second surface (rear surface) of the first portion 221 is provided with a recess 2213 that rotatably accommodates at least a portion of the load portion 21 (the socket portion 211 and a portion of the shaft portion 212). The recess 2213 is shaped like a rectangular box. The rear portion of the insertion hole 2212 and the front portion of the recess 2213 are connected to each other.

[0056] The first part 221 is attached to the first surface (front surface) of the second part 222 with at least a portion of the load part 21 rotatably housed in the recess 2213. In other words, the first part 221 is attached to the first surface of the second part 222 with at least a portion of the load part 21 sandwiched and housed between the first part 221 and the second part 222. The first part 221 is attached to the first surface of the second part 222 by inserting each of the multiple first screws 24 into the through holes 2211 of the first part 221 and tightening them into the screw holes 2221 of the second part.

[0057] The first surface of the second part 222 is provided with an insertion hole 2222 through which the output shaft 12 of the tool body 1 is inserted. The insertion hole 2222 has a circular shape, as viewed from the front-rear direction, large enough to allow the output shaft 12 to be inserted therethrough. As shown in FIG. 6 , the second surface (rear surface) of the second part 222 is provided with a recess 2224 shaped to conform to the outer shape of the housing 17 of the tool body 1. More specifically, the recess 2224 is shaped to conform to the outer shape of the front portion of the main body 171 of the housing 17. The rear portion of the insertion hole 2222 is connected to the front portion of the recess 2224. Therefore, when the front portion of the main body 171 of the tool body 1 is inserted into the recess 2224 of the second part 222, the output shaft 12 is inserted into the insertion hole 2222, and the holding portion 121 of the output shaft 12 protrudes from the first surface of the second part 222.

[0058] 4, one end (lower end) of the third portion 223 is provided with a groove 2232 whose shape follows the outer shape of the housing 17 of the tool body 1. More specifically, the groove 2232 follows the outer shape of the central portion in the front-to-rear direction of the main body 171 of the housing 17. The groove 2232 penetrates the third portion 223 from the first surface (front surface) to the second surface (rear surface).

[0059] The third part 223 is attached to the second surface (rear surface) of the second part 222 with the front portion of the main body 171 of the tool body 1 inserted into the recess 2224 of the second part 222. The third part 223 is attached to the second surface of the second part 222 by inserting each of the plurality of second screws 25 into the through holes 2231 of the third part 223 and tightening them into the screw holes 2223 (see FIG. 6 ) of the second part 222. With the third part 223 attached to the second surface of the second part 222, the tool body 1 is sandwiched between the second part 222 and the third part 223.

[0060] (2-3-3) Load Unit The load unit 21 rotates integrally with the output shaft 12. More specifically, the load unit 21 is configured to be attachable to the holder 121 of the output shaft 12, and rotates integrally with the output shaft 12 when the load unit 21 is attached to the holder 121. This configuration has the advantage of reducing the difference between users in the load applied to the output shaft 12 when the acquisition unit 15 acquires the acquisition data D1 for determining the state of the tool body 1.

[0061] The load portion 21 of this embodiment has a socket portion 211 and a shaft portion 212. The socket portion 211 and the shaft portion 212 are cylindrical. The radius of the socket portion 211 is larger than the radius of the shaft portion 212. The axial directions of the socket portion 211 and the shaft portion 212 are along the front-to-rear direction. The rear end of the socket portion 211 is configured to be attachable to the holding portion 121 of the output shaft 12. The front end of the socket portion 211 and the rear end of the shaft portion 212 are connected. The shaft portion 212 is formed to be insertable into the bolt 23.

[0062] The front portion of the main body 171 of the tool body 1 is inserted into the recess 2224 of the second part 222, whereby the holding part 121 of the output shaft 12 protrudes from the first surface of the second part 222 and the socket part 211 is attached. In this embodiment, the front portion of the main body 171 of the tool body 1 is inserted into the recess 2224 of the second part 222 and the socket part 211 is attached to the holding part 121 of the output shaft 12, whereby the stabilization part 2 is attached to the output shaft 12.

[0063] Furthermore, when the socket portion 211 is attached to the holding portion 121 of the output shaft 12, the third portion 223 is attached to the second surface of the second portion 222, so that the recess 2224 of the second portion 222 and the groove 2232 of the third portion 223 each come into surface contact with the main body portion 171 of the housing 17 of the tool body 1. As a result, the stabilizing portion 2 is fixed to the main body portion 171 of the housing 17 in a state where it is attached to the output shaft 12. In the present disclosure, "in surface contact" means that the inner surface of the recess 2224 of the second portion 222 and the inner surface of the groove 2232 of the third portion 223 each come into contact with the outer surface of the main body portion 171 of the housing 17 of the tool body 1 without any gaps.

[0064] As described above, in the power tool system 100 of this embodiment, when the socket portion 211 is attached to the holder 121 of the output shaft 12, the recess 2224 of the second portion 222 and the groove 2232 of the third portion 223 each come into surface contact with the main body portion 171 of the housing 17 of the tool body 1, thereby fixing the stabilizing unit 2 to the housing 17. This prevents the positional relationship (e.g., angle) between the load portion 21 of the stabilizing unit 2 and the output shaft 12 of the tool body 1 from varying depending on the user while the acquisition unit 15 is acquiring the acquired data D1. In other words, the load applied to the output shaft 12 while the acquisition unit 15 is acquiring the acquired data D1 can be kept constant and independent of the user. As a result, the determining unit 14 can accurately determine the state of the tool body 1. That is, the power tool system 100 of this embodiment has the advantage of being able to accurately determine the state of the tool body 1 .

[0065] (2-4) Notification Unit The notification unit 3 notifies the judgment result output from the judgment unit 14 of the tool body 1. More specifically, the notification unit 3 notifies whether the judgment unit 14 of the tool body 1 has classified the state of the tool body 1 into “normal”, “deteriorated”, or “end of life”.

[0066] The notification unit 3 of this embodiment notifies the determination result of the determination unit 14 in a manner that can be visually recognized by the user of the tool body 1. That is, as shown in Fig. 1 , the notification unit 3 of this embodiment includes a light-emitting unit 31 that outputs light in accordance with the determination result of the determination unit 14. This configuration has the advantage of preventing the user of the tool body 1 from misinterpreting the determination result of the determination unit 14.

[0067] As shown in Fig. 2A, the light-emitting unit 31 is provided in the front portion of the upper surface of the battery mounting section 173. As shown in Fig. 2B, the light-emitting unit 31 has three light-emitting elements 311a, 311b, and 311c. The three light-emitting elements 311a, 311b, and 311c are provided side by side in the front-to-back direction in the front portion of the upper surface of the battery mounting section 173. Each of the three light-emitting elements 311a, 311b, and 311c outputs light of a different color. Specifically, the light-emitting element 311a outputs green light, the light-emitting element 311b outputs yellow light, and the light-emitting element 311c outputs red light.

[0068] Each of the three light-emitting elements 311a, 311b, and 311c corresponds to a state of the tool body 1 that can be determined by the determination unit 14. Specifically, the light-emitting element 311a corresponds to a "normal" state of the tool body 1, the light-emitting element 311b corresponds to a "deteriorated" state of the tool body 1, and the light-emitting element 311c corresponds to a "terminal" state of the tool body 1.

[0069] The light-emitting unit 31 outputs light from one of three light-emitting elements 311a, 311b, and 311c corresponding to the state of the tool body 1 determined by the determination unit 14, depending on whether the determination unit 14 of the tool body 1 has classified the state of the tool body 1 as "normal," "deteriorated," or "end-stage." That is, if the determination unit 14 of the tool body 1 determines that the state of the tool body 1 is "normal," the light-emitting unit 31 outputs green light from the light-emitting element 311a. If the determination unit 14 of the tool body 1 determines that the state of the tool body 1 is "deteriorated," the light-emitting unit 31 outputs yellow light from the light-emitting element 311b, and if the determination unit 14 of the tool body 1 determines that the state of the tool body 1 is "end-stage," the light-emitting unit 31 outputs red light from the light-emitting element 311c.

[0070] (3) Modifications The above-described embodiment is merely one of various embodiments of the present disclosure. The above-described embodiment can be modified in various ways depending on the design, etc., as long as the object of the present disclosure can be achieved. The following modifications may be realized in appropriate combination. The same components as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof will be omitted.

[0071] (3-1) First Modification In the power tool system 100 of the above-described embodiment, the stabilizing unit 2 is provided outside the housing 17. However, as shown in FIG. 7 , in a power tool system 100a of the first modification, the stabilizing unit 2a may be provided inside the housing 17. In other words, the housing 17 of the tool main body 1a may house the stabilizing unit 2a. In this case, the stabilizing unit 2a is configured to be attachable to the output shaft 12, the transmission mechanism 13, and the motor 11, which are the rotating member X1. More specifically, the stabilizing unit 2a is configured to be attachable to the portion of the output shaft 12 housed in the housing 17 (the rear portion), the transmission mechanism 13, and the motor 11. The stabilizing unit 2a is fixed to the housing 17 while attached to the rotating member X1. This configuration eliminates the need to insert the tool main body 1a into the stabilizing unit 2a each time the acquiring unit 15 acquires acquired data D1 for determining the state of the tool main body 1a. That is, there is an advantage that the state of the tool body 1a can be determined easily and accurately.

[0072] In the power tool system 100a of the first modified example, the tool main body 1a is preferably configured to be switchable between a normal state in which the user performs a tightening operation and an acquisition state in which the determination unit 14 acquires the acquired data D1. More specifically, the tool main body 1a is preferably provided with a switching unit that switches between the normal state and the acquisition state. For example, the switching unit switches between the normal state and the acquisition state when the user operates a push switch. Note that in the normal state, the stabilizing unit 2a is detached from the rotating member X1. On the other hand, in the acquisition state, the stabilizing unit 2a is attached to the rotating member X1 and fixed to the housing 17. That is, the switching unit is a mechanism that switches the stabilizing unit 2a between a state in which it is detached from the rotating member X1 and a state in which it is attached to the rotating member X1 and fixed to the housing 17.

[0073] (3-2) Other Modifications Other modifications of the above-described embodiment are listed below. The following modifications may be implemented in appropriate combination.

[0074] In the above-described embodiment, the stabilizing unit 2 is configured to be attachable to the output shaft 12. However, the stabilizing unit 2 may be configured to be attachable to the motor 11 (e.g., the rotating shaft) or the transmission mechanism 13 (e.g., the drive shaft 132, the hammer 133, or the anvil 134). That is, the stabilizing unit 2 may be configured to be attachable to the rotating member X1, which is at least one of the motor 11, the transmission mechanism 13, and the output shaft 12. That is, in the above-described embodiment, the rotating member X1 to which the stabilizing unit 2 is attached is the output shaft 12, but it may also be at least one of the motor 11, the transmission mechanism 13, and the output shaft 12.

[0075] In the above-described embodiment, the notification unit 3 notifies the determination result of the determination unit 14 in a manner that is recognizable visually by the user of the tool body 1. However, the notification unit 3 may also notify the determination result of the determination unit 14 in a manner that is recognizable audibly or tactilely by the user of the tool body 1. That is, the notification unit 3 may notify the determination result of the determination unit 14 in a manner that is recognizable by at least one of the senses of sight, hearing, and touch of the user of the tool body 1. This configuration has the advantage that the user of the tool body 1 can easily recognize the determination result of the determination unit 14.

[0076] Specifically, as shown in FIG. 8 , when the notification unit 3a notifies the determination result of the determination unit 14 in a manner that is audible to the user of the tool body 1b, the notification unit 3a of the tool body 1b of the power tool system 100b includes an acoustic unit 32 that outputs a sound in response to the determination result of the determination unit 14. The acoustic unit 32 outputs a sound corresponding to the state of the tool body 1b determined by the determination unit 14, depending on whether the state of the tool body 1b is classified as “normal,” “deteriorated,” or “end-of-life.” For example, if the determination unit 14 determines the state of the tool body 1b as “normal,” the acoustic unit 32 outputs a beep once. If the determination unit 14 determines the state of the tool body 1b as “deteriorated,” the acoustic unit 32 outputs a beep twice. If the determination unit 14 determines the state of the tool body 1b as “end-of-life,” the acoustic unit 32 outputs a beep three times. The above configuration has the advantage that the user of the tool body 1b can more easily recognize the determination result of the determination unit 14.

[0077] 9 , when the notification unit 3b notifies the user of the tool body 1c of the power tool system 100c of the determination result of the determination unit 14 in a manner that can be recognized by the user's sense of touch, the notification unit 3b of the tool body 1c includes a vibration generating unit 33 that generates vibrations in response to the determination result of the determination unit 14. The vibration generating unit 33 generates vibrations corresponding to the state of the tool body 1c determined by the determination unit 14, depending on whether the determination unit 14 of the tool body 1c classifies the state of the tool body 1c as “normal,” “deteriorated,” or “end-stage.” For example, if the determination unit 14 determines the state of the tool body 1c as “normal,” the vibration generating unit 33 generates one vibration. If the determination unit 14 determines the state of the tool body 1c as “deteriorated,” the vibration generating unit 33 generates two vibrations. If the determination unit 14 determines the state of the tool body 1c as “end-stage,” the vibration generating unit 33 generates three vibrations. The above configuration has the advantage that the user of the tool body 1c can more easily recognize the determination result of the determination unit 14.

[0078] As shown in FIG. 10 , the tool main body 1d of the power tool system 100d may further include a communication unit 4 that transmits (communicates with) the determination result of the determination unit 14 to an external device C1. More specifically, the determination unit 14 outputs the determination result to the communication unit 4 in addition to the notification unit 3, and the communication unit 4 transmits the determination result output from the determination unit 14 to the external device C1. The external device C1 includes a display unit C11 and a history storage unit C12. The display unit C11 displays the determination result of the determination unit 14 transmitted from the communication unit 4. The display unit C11 is, for example, a liquid crystal display or an organic electroluminescence (EL) display. The history storage unit C12 stores the determination result of the determination unit 14 transmitted from the communication unit 4 as history information. The history storage unit C12 is, for example, a storage device such as a magnetic core memory or a semiconductor memory. The above configuration has the effect that, for example, a person at a position away from the tool body 1d can check the determination result of the determination unit 14 and can also retroactively check the determination result of the determination unit 14. In short, there is an advantage that the determination result of the determination unit 14 can be easily checked.

[0079] In the above-described embodiment, the notification unit 3 is provided in the tool body 1 , but it may be separate from the tool body 1 .

[0080] (Summary) A power tool system (100, 100a to 100d) of a first aspect includes a tool body (1, 1a to 1d), a stabilization unit (2, 2a), and a notification unit (3, 3a, 3b). The tool body (1, 1a to 1d) has an output shaft (12), a transmission mechanism (13), a determination unit (14), an acquisition unit (15), and a housing (17). The output shaft (12) rotates by the power of a motor (11). The transmission mechanism (13) transmits the power of the motor (11) to the output shaft (12). The determination unit (14) determines the state of the tool body (1, 1a to 1d). The acquisition unit (15) acquires acquisition data (D1) that the determination unit (14) uses to determine the state of the tool body (1, 1a to 1d). The housing (17) accommodates at least a portion of the motor (11), the transmission mechanism (13), and the output shaft (12). The notification unit (3, 3a, 3b) notifies the determination result of the determination unit (14). The stabilization unit (2, 2a) is configured to be attachable to a rotating member (X1) that is at least one of the motor (11), the transmission mechanism (13), and the output shaft (12). The stabilization unit (2, 2a) is fixed to the housing (17) while attached to the rotating member (X1).

[0081] This embodiment has the advantage that the state of the tool body (1, 1a to 1d) can be determined with high accuracy.

[0082] In the power tool system (100, 100b to 100d) of the second aspect, the stabilizing portion (2, 2a) is provided on the outside of the housing (17) in the first aspect.

[0083] This embodiment has the advantage that the tool body (1, 1b to 1d) can be made smaller.

[0084] In the power tool system (100a) of the third aspect, the stabilizing portion (2, 2a) is provided inside the housing (17) in the first aspect.

[0085] This embodiment has the advantage that the state of the tool body (1a) can be determined easily and accurately.

[0086] In the power tool system (100, 100b to 100d) of the fourth aspect, in any one of the first to third aspects, the stabilizing section (2) has a load section (21) that rotates integrally with the output shaft (12).

[0087] This aspect has the advantage that it is possible to reduce the difference between users in the load applied to the output shaft (12) when the acquisition unit (15) acquires the acquired data (D1).

[0088] In the fifth aspect of the power tool system (100, 100a to 100d), in any of the first to fourth aspects, the notification unit (3, 3a, 3b) notifies the user of the tool body (1, 1a to 1d) of the judgment result of the judgment unit (14) in a manner that can be recognized by at least one of the senses of sight, hearing, and touch.

[0089] This embodiment has the advantage that the user of the tool body (1, 1a to 1d) can easily recognize the determination result of the determination unit (14).

[0090] In the power tool system (100, 100a, 100d) of the sixth aspect, in the fifth aspect, the notification unit (3) includes a light emitting unit (31) that outputs light according to the determination result of the determination unit (14).

[0091] This embodiment has the advantage that it is possible to prevent the user of the tool body (1) from misinterpreting the determination result of the determination unit (14).

[0092] In the power tool system (100b) of the seventh aspect, in the fifth aspect, the notification unit (3a) includes an acoustic unit (32) that outputs a sound according to the determination result of the determination unit (14).

[0093] This embodiment has the advantage that the user of the tool body (1b) can more easily recognize the determination result of the determination unit (14).

[0094] In the power tool system (100c) of the eighth aspect, in the fifth aspect, the notification unit (3b) includes a vibration generating unit (33) that generates vibrations in accordance with the determination result of the determination unit (14).

[0095] This embodiment has the advantage that the user of the tool body (1c) can more easily recognize the determination result of the determination unit (14).

[0096] In the power tool system (100d) of the ninth aspect, in any of the first to eighth aspects, the tool body (1d) has a communication unit (4) that communicates the judgment result of the judgment unit (14) to an external device (C1).

[0097] This embodiment has the advantage that the determination result of the determination unit (14) can be easily confirmed.

[0098] REFERENCE SIGNS LIST 1, 1a to 1d Tool body 11 Motor 12 Output shaft 13 Transmission mechanism 14 Determination unit 15 Acquisition unit 17 Housing 2, 2a Stabilization unit 21 Load unit 3, 3a, 3b Notification unit 31 Light emitting unit 32 Sound unit 33 Vibration generating unit 4 Communication unit 100, 100a to 100d Power tool system C1 External device D1 Acquired data X1 Rotating member

Claims

1. An electric power tool system comprising: a tool body; a stabilizing unit; and an alarm unit, wherein the tool body has: an output shaft rotated by power of a motor; a transmission mechanism that transmits the power of the motor to the output shaft; a judgment unit that judges a state of the tool body; an acquisition unit that acquires acquired data for the judgment unit to judge the state of the tool body; and a housing that accommodates the motor, the transmission mechanism, and at least a portion of the output shaft, wherein the alarm unit reports the judgment result of the judgment unit, and the stabilizing unit is configured to be attachable to a rotating member which is at least one of the motor, the transmission mechanism, and the output shaft, and is fixed to the housing when attached to the rotating member.

2. The power tool system according to claim 1, wherein the stabilizing portion is provided on the outside of the housing.

3. The power tool system according to claim 1, wherein the stabilizing portion is provided on the inside of the housing.

4. The power tool system according to any one of claims 1 to 3, wherein the stabilizing section has a load section that rotates integrally with the output shaft.

5. A power tool system according to any one of claims 1 to 3, wherein the notification unit notifies the result of the judgment by the judgment unit in a manner that can be recognized by at least one of the senses of sight, hearing, and touch of a user of the tool body.

6. The power tool system according to claim 5, wherein the notification unit includes a light emitting unit that outputs light in accordance with the determination result of the determination unit.

7. The power tool system according to claim 5, wherein the notification unit includes an audio unit that outputs a sound in accordance with the determination result of the determination unit.

8. The power tool system according to claim 5, wherein the notification unit includes a vibration generating unit that generates vibrations in response to a determination result of the determination unit.

9. The power tool system according to claim 4, wherein the notification unit notifies the result of the determination by the determination unit in a manner that can be recognized by at least one of the senses of sight, hearing, and touch of a user of the tool body.

10. The power tool system according to claim 9, wherein the notification unit includes a light emitting unit that outputs light according to the determination result of the determination unit.

11. The power tool system according to claim 9, wherein the notification unit includes an acoustic unit that outputs a sound in accordance with the determination result of the determination unit.

12. The power tool system according to claim 9, wherein the notification unit includes a vibration generating unit that generates vibrations in response to a determination result of the determination unit.

13. The power tool system according to any one of claims 1 to 3, wherein the tool body has a communication unit that transmits the determination result of the determination unit to an external device.

Images