WO2014061807A1 - Outil d'enfoncement - Google Patents

Outil d'enfoncement Download PDF

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Publication number
WO2014061807A1
WO2014061807A1 PCT/JP2013/078383 JP2013078383W WO2014061807A1 WO 2014061807 A1 WO2014061807 A1 WO 2014061807A1 JP 2013078383 W JP2013078383 W JP 2013078383W WO 2014061807 A1 WO2014061807 A1 WO 2014061807A1
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WO
WIPO (PCT)
Prior art keywords
sensor
motor
driving
crank
driving tool
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PCT/JP2013/078383
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English (en)
Japanese (ja)
Inventor
瀛 楊
健也 ▲柳▼原
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株式会社マキタ
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Publication date
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Publication of WO2014061807A1 publication Critical patent/WO2014061807A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/04—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/06—Hand-held nailing tools; Nail feeding devices operated by electric power

Definitions

  • the present invention relates to a driving tool for driving a driving tool.
  • US Pat. No. 8,079,504 describes a driving tool for driving a driving tool into a workpiece.
  • the first piston generates compressed air in the first cylinder, and the compressed air is sent to the second cylinder.
  • the compressed air moves the second piston in the second cylinder. Due to the movement of the second piston, the second piston strikes the driving tool. Thereby, the driving tool is driven out toward the workpiece.
  • the driving tool has a sensor that detects the position of the first piston during an operation cycle in which the driving tool is driven.
  • a control apparatus stops electricity supply to a motor according to the position of the 1st piston detected by the said sensor. This stops the first piston in the proper position for the next operating cycle.
  • an object of the present invention is to provide a further improvement technique related to a detection technique in a driving tool.
  • a motor a crank member driven by the motor, a piston driven by the crank member, a controller for controlling the motor, and a first for detecting the state of the crank member.
  • a driving tool having a sensor and a second sensor for detecting the operation state of the motor is configured.
  • the controller is configured to calculate an estimated crank state information value corresponding to the state of the crank member based on the detection result of the second sensor.
  • the controller is configured to stop driving the motor when the difference between the state information value related to the state of the crank member based on the detection result of the first sensor and the estimated crank state information value exceeds a predetermined threshold. Yes.
  • detecting the state of the crank member means detecting the position, speed, or acceleration of the crank member. That is, the estimated crank state information value means a value corresponding to the position, speed, or acceleration of the crank member calculated based on the detection result of the second sensor. “Detecting the operating state of the motor” means the position and rotational speed of the rotating shaft of the motor, the current and voltage supplied to the motor, or the position and rotation of the component connected to the motor and driven by the motor. It preferably includes detecting the speed.
  • the detection is based on the detection results of the first sensor and the second sensor. Whether or not the first sensor is operating normally is detected based on the difference in the state of the crank member. That is, when an abnormality occurs in the first sensor, it is possible to prevent the driving tool from being driven out from the driving tool by stopping the driving of the motor.
  • the controller is configured to calculate the estimated crank angular velocity of the crank member based on the detection result of the second sensor as the estimated crank state information value.
  • the first sensor may detect the angular velocity of the crank member.
  • the first sensor may detect the position or angular acceleration of the crank member, and the controller may calculate the angular acceleration of the crank member.
  • the second sensor is configured to detect a current value and a voltage value supplied to the motor. Then, the controller is configured to calculate an estimated crank angular speed as an estimated crank state information value by calculating the rotational speed of the motor from the current value and the voltage value. Therefore, the second sensor preferably has an ammeter and a voltmeter.
  • the angular speed of the crank is calculated from the rotational speed of the motor based on the detection result of the second sensor.
  • the relationship between the motor current value, voltage value, and rotational speed is determined by the motor configuration as the motor drive characteristics. Therefore, the rotation speed of the motor is calculated by detecting the current value and the voltage value by the second sensor. That is, the angular speed of the crank member can be easily calculated based on the rotational speed of the motor.
  • the controller is configured to calculate the estimated crank position of the crank member based on the detection result of the second sensor as the estimated crank state information value.
  • the first sensor may detect the position of the crank member.
  • the first sensor may detect the angular velocity or angular acceleration of the crank member, and the controller may calculate the position of the crank member.
  • a crank position it is preferable to calculate a crank angle when the initial position of the crank member is 0 degree.
  • the reduction gear is arranged between the motor and the crank member.
  • the second sensor is configured to detect the rotational position of the reduction gear.
  • the rotational speed of the motor is reduced in the reduction gear. Therefore, the rotational position of the reduction gear is accurately detected by the second sensor. Therefore, the position of the crank member is calculated with high accuracy.
  • the controller has an informing means for informing that the driving of the motor has been stopped.
  • the notification means it is preferable to use light emitting means, vibration generating means, sound generating means or the like.
  • the light emitting means typically, an LED, a laser irradiation device, or the like is used.
  • the vibration generating means typically, a means that includes a motor and generates vibration by the rotation of the motor is used.
  • the sound generation means typically, a means that includes a speaker and outputs a stored sound source from the speaker is used.
  • FIG. 1 is an external view showing an overall configuration of an electro-pneumatic nailer.
  • FIG. It is A arrow directional view of FIG. It is sectional drawing which shows the whole structure of the internal mechanism of a nailing machine.
  • FIG. 4 is a sectional view taken along line IV-IV in FIG. 3.
  • FIG. 5 is a sectional view taken along line VV in FIG. 2.
  • FIG. 4 is a cross-sectional view taken along the line VI-VI in FIG. 3 and shows a state where the valve is closed.
  • FIG. 6 shows a nailing state in which the valve is opened and the driving piston is moved forward.
  • FIG. 6 shows a state in which the open state of the valve is maintained, and the driving piston is returned to the vicinity of the rear initial position.
  • It is a block diagram which shows the control system of the nail driver in 1st Embodiment. It is a block diagram which shows the control system of the nail driver in 2nd Embodiment.
  • FIGS. 1 and 2 A first embodiment of the present invention will be described with reference to FIGS.
  • the first embodiment will be described using an electro-pneumatic nailer as an example of a driving tool.
  • the nailing machine 100 is configured mainly by a main body housing 101 and a magazine 105 when viewed generally.
  • the main body housing 101 constitutes a tool main body and forms an outline of the nailing machine 100.
  • the magazine 105 is loaded with nails (not shown) that are driven into the workpiece.
  • the main body housing 101 is formed by joining together a pair of substantially symmetrical housings.
  • the main body housing 101 includes a handle portion 103, a driving mechanism housing portion 101A, a compression device housing portion 101B, and a motor housing portion 101C.
  • the handle portion 103, the driving mechanism housing portion 101A, the compression device housing portion 101B, and the motor housing portion 101C are arranged so as to form a substantially square shape in a side view.
  • the handle portion 103 is a long member extending at a predetermined length.
  • One end side of the handle portion 103 is connected to one end side of the driving mechanism housing portion 101A, and the other end side of the handle portion 103 is connected to one end side of the motor housing portion 101C.
  • the compression device housing portion 101 ⁇ / b> B is disposed so as to extend substantially parallel to the handle portion 103.
  • One end side of the compression device accommodating portion 101B is connected to the other end side of the driving mechanism accommodating portion 101A, and the other end side of the compression device accommodating portion 101B is connected to the other end side of the motor accommodating portion 101C.
  • the nailing machine 100 forms a space S surrounded by the handle portion 103, the driving mechanism housing portion 101A, the compression device housing portion 101B, and the motor housing portion 101C.
  • a driver guide 141 and an LED 107 are arranged at the tip (right end in FIG. 1).
  • the direction toward the right side of FIG. 1 is the nail launch direction.
  • the front end side (the right side in FIG. 1) of the nailing machine 100 is referred to as the front side
  • the opposite side (the left side in FIG. 1) is referred to as the rear side.
  • the connection side (upper side in FIG. 1) of the handle portion 103 with the driving mechanism housing portion 101A is the upper side
  • the connection side (lower side in FIG. 1) of the handle portion 103 with the motor storage portion 101C is down. Called the side.
  • the driving mechanism accommodating portion 101A accommodates the nail driving mechanism 120.
  • the nail driving mechanism 120 is mainly composed of a driving cylinder 121 and a driving piston 123.
  • the driving cylinder 121 accommodates a driving piston 123 for driving a nail so as to be slidable in the front-rear direction (long axis direction).
  • the driving piston 123 has a piston main body 124 and a driver 125.
  • the piston main body 124 is slidably accommodated in the driving cylinder 121.
  • the driver 125 is a long member.
  • the driver 125 is provided integrally with the piston main body 124 and is disposed so as to extend forward.
  • the piston main body 124 and the driver 125 are configured to be driven by compressed air supplied to the cylinder chamber 121a and move linearly in the long axis direction of the cylinder 121.
  • the driver 125 is configured to drive out the nail by moving forward in the driving passage 141a of the driver guide 141.
  • the driving cylinder chamber 121 a is formed as a space surrounded by the inner wall surface of the driving cylinder 121 and the rear surface of the piston main body 124.
  • the driver guide 141 is disposed at the tip of the driving cylinder 121 and includes a driving passage 141a having a nail injection port at the tip.
  • the magazine 105 is disposed in front of the compression device housing portion 101 ⁇ / b> B that is the distal end side of the main body housing 101.
  • the magazine 105 is connected to the driver guide 141, and is configured to supply nails to the driving path 141a.
  • the magazine 105 is provided with a pusher plate 105a for pushing the nail in the supply direction (upward in FIG. 3). By this pusher plate 105a, nails are supplied one by one from the direction intersecting the driving direction into the driving passage 141a of the driver guide 141.
  • the compression device accommodating portion 101 ⁇ / b> B accommodates the compression device 130.
  • the compression device 130 is mainly configured by a compression cylinder 131, a compression piston 133, and a crank mechanism 115.
  • the compression piston 133 is arranged to be slidable in the vertical direction within the compression cylinder 131.
  • This compression piston 133 is an implementation structural example corresponding to the "piston" in this invention.
  • the compression cylinder 131 is disposed along the magazine 105, and the upper end side of the compression cylinder 131 is connected to the front end portion of the driving cylinder 121.
  • the compression piston 133 is arranged so as to slide up and down along the magazine 105.
  • the operation direction of the compression piston 133 is substantially orthogonal to the operation direction of the driving piston 123.
  • the volume of the compression chamber 131a that is the internal space of the compression cylinder 131 changes. That is, the compression piston 133 moves upward to reduce the volume of the compression chamber 131a, thereby compressing the air in the compression chamber 131a.
  • the compression chamber 131 a is formed on the upper side close to the driving cylinder 121.
  • the compression cylinder 131 includes an atmospheric release valve (not shown), and is configured to be able to release the compression chamber 131a to the atmosphere. The air release valve is normally kept closed.
  • the motor housing portion 101 ⁇ / b> C houses the electric motor 111.
  • the electric motor 111 is arranged so that the rotation axis of the motor shaft is substantially parallel to the long axis of the driving cylinder 121. Therefore, the rotation axis of the electric motor 111 is orthogonal to the operation direction of the compression piston 133.
  • a battery mounting area is formed on the lower side of the motor housing 101C, and a rechargeable battery pack 110 that supplies power to the electric motor 111 is detachably mounted.
  • the rotational output of the electric motor 111 is transmitted to the crank mechanism 115 after being decelerated by the planetary gear type reduction mechanism 113.
  • the rotational motion of the electric motor 111 is converted into a linear motion by the crank mechanism 115 and transmitted to the compression piston 133.
  • the speed reduction mechanism 113 and the crank mechanism 115 are accommodated in the inner housing 102.
  • the inner housing 102 is disposed between the compression device housing portion 101B and the motor housing portion 101C.
  • the crank mechanism 115 is mainly composed of a crankshaft 115a, an eccentric pin 115b, and a connecting rod 115c.
  • the crankshaft 115a is connected to a planetary gear type reduction mechanism 113. That is, the crankshaft 115a is rotated by the rotation of the electric motor 111 decelerated by the speed reduction mechanism 113.
  • the eccentric pin 115b is provided at a position eccentric from the rotation center of the crankshaft 115a.
  • One end of the connecting rod 115c is connected to the eccentric pin 115b so as to be relatively rotatable, and the other end is connected to the compression piston 133 so as to be relatively rotatable.
  • the crank mechanism 115 is disposed below the compression cylinder 131.
  • a reciprocating compression device mainly including the compression cylinder 131, the compression piston 133, and the crank mechanism 115 is configured as the compression device 130.
  • This electric motor 111 is an implementation configuration example corresponding to the “motor” in the present invention.
  • the handle portion 103 is provided with a trigger 103a, a trigger switch 103b, and a control device 109.
  • the electric motor 111 is controlled by the control device 109 according to the operation of the trigger 103 a provided in the handle portion 103 and the driver guide 141 provided in the distal end region of the main body housing 101.
  • the trigger switch 103b is turned on.
  • the trigger switch 103b is turned off by releasing the pulling operation of the trigger 103a.
  • the driver guide 141 as a contact arm is disposed in the front end region of the main body housing 101 so as to be movable in the front-rear direction of the nailing machine 100. As shown in FIG. 6, the driver guide 141 is urged forward by an urging spring 142. When the driver guide 141 is positioned forward, the contact arm switch 143 is turned off. On the other hand, when the driver guide 141 is moved to the main body housing 107 side, the contact arm switch 143 is turned on. The electric motor 111 is energized when both the trigger switch 103b and the contact arm switch 143 are switched on, and the electric motor 111 is stopped when either one of the switches is switched off.
  • the nail driver 100 includes an air passage 135 and a valve chamber 137 a that connect the compression chamber 131 a of the compression cylinder 131 and the cylinder chamber 121 a of the driving cylinder 121.
  • the air passage 135 mainly includes a communication port 135a, a communication port 135b, a communication passage 135c, an annular groove 121c, and a valve chamber 137a.
  • the communication port 135 a is formed in the cylinder head 131 b of the compression cylinder 131.
  • the communication port 135a communicates with the compression chamber 131a.
  • the communication port 135 b is formed in the cylinder head 121 b of the driving cylinder 121.
  • the communication port 135b communicates with the valve chamber 137a.
  • the communication path 135c connects the communication port 135a and the communication port 135b.
  • the communication path 135 c extends linearly in the front-rear direction along the driving cylinder 121.
  • the communication port 135b communicates with an annular groove 121c formed in the peripheral surface of the valve chamber 137a.
  • the annular groove 121c communicates with the valve chamber 137a.
  • the valve chamber 137a communicates with the cylinder chamber 121a.
  • the communication port 135b communicates with the cylinder chamber 121a via the annular groove 121c and the valve chamber 137a.
  • An electromagnetic valve 137 that opens and closes the air passage 135 is accommodated in the valve chamber 137a.
  • the electromagnetic valve 137 is a columnar member having substantially the same diameter as the piston main body 124 of the driving piston 123.
  • the electromagnetic valve 137 is disposed so as to be movable in the front-rear direction within the valve chamber 137a.
  • An electromagnet 138 is disposed behind the electromagnetic valve 137.
  • the electromagnetic valve 137 moves in the front-rear direction by switching energization to the electromagnet 138 and switching off the energization.
  • two O-rings 139a and 139b are arranged at a predetermined interval in the front-rear direction.
  • the electromagnetic valve 137 moves rearward to open the annular groove 121c, and moves forward to close the annular groove 121c.
  • the front O-ring 139a contacts the inner wall surface of the valve chamber 137a in front of the annular groove 121c, thereby blocking communication between the annular groove 121c and the cylinder chamber 121a.
  • the annular groove 121c communicates with the cylinder chamber 121a.
  • the rear O-ring 139b prevents the compressed air from leaking outside from the communication port 135b. That is, the O-ring 139b is not involved in opening / closing the annular groove 121c.
  • the electromagnetic valve 137 that opens and closes the air passage 135 is provided in the air passage 135 on the connection side of the driving cylinder 121 with the cylinder chamber 121a.
  • the electromagnetic valve 137 is always disposed in front of the annular groove 121 c closed by the electromagnet 138.
  • the stopper 136 is disposed in front of the electromagnetic valve 137 and restricts the movement of the electromagnetic valve 137 forward.
  • the stopper 136 is formed by a flange-like member protruding in the radial direction in the cylinder chamber 121a. Further, the stopper 136 defines the rear end position of the driving piston 123 that moves rearward.
  • the nailing machine 100 has an initial position in which the driving piston 123 is located at the rear end position (left end position in FIG. 3) and the compression piston 133 is located at the lower end position (bottom dead center). It is defined as. That is, the initial state is defined as a crank angle of 0 degrees (bottom dead center).
  • the nail driver 100 includes a magnetic sensor 150.
  • the magnetic sensor 150 is mainly composed of a magnet 151 and a hall element 152.
  • the magnet 150 is provided on the crankshaft 115a.
  • the hall element 152 is provided at a position facing the magnet 151 of the compression device housing portion 101B.
  • the hall element 152 is electrically connected to the battery pack 110 and further connected to the control device 109. Hall element 152 detects the position of crankshaft 115a.
  • This magnetic sensor 150 is an implementation configuration example corresponding to the “first sensor” in the present invention.
  • the control device 109 is an implementation configuration example corresponding to the “controller” in the present invention.
  • the driver guide 141 is pressed against the workpiece and the contact arm switch 143 (see FIG. 6) is turned on, and the trigger 103a is pulled and the trigger switch 103b is turned on.
  • the electric motor 111 is energized.
  • the crank mechanism 115 is driven via the speed reduction mechanism 113, and the compression piston 133 moves upward.
  • the electromagnetic valve 137 closes the air passage 135, the air in the compression chamber 131a is compressed by the movement of the compression piston 133.
  • the control device 109 controls the electromagnet 138 and moves the electromagnetic valve 137 backward. Move to. That is, when the compressed air in the compression chamber 131a is in the maximum compressed state, the electromagnetic valve 137 is opened. Thereby, the annular groove 121c communicates with the cylinder chamber 121a, and the compressed air in the compression chamber 131a is supplied into the cylinder chamber 121a through the air passage 135.
  • the driving piston 123 is moved forward by the action of the air spring by the compressed air, as shown in FIG. Then, the driver 125 of the driving piston 123 moved forward hits the nail of the driving passage 141a (see FIG. 3). Thereby, a driving operation for driving out the nail is performed.
  • the compression piston 133 moves toward the bottom dead center. At that time, the volume of the compression chamber 131a is increased, and the air in the compression chamber 131a becomes a negative pressure lower than the atmospheric pressure.
  • the negative pressure generated in the compression chamber 131a is driven through the air passage 135 and the cylinder chamber 121a and acts on the piston 123. Thereby, as shown in FIG. 8, the driving piston 123 is sucked and moved rearward.
  • the driving piston 123 is in contact with the stopper 136 and is located at the initial position.
  • the control device 109 controls the electromagnet 138 and moves the electromagnetic valve 137 forward.
  • the air passage 135 is closed. Note that when the compression piston 133 returns to the initial position, even if the trigger switch 103b and the contact arm switch 143 are maintained in the ON state, the power supply to the electric motor 111 is cut off and the electric motor 111 is stopped. In this way, one cycle of the launching operation is completed. During the launching operation, the LED 107 irradiates the tip region of the driver guide 141.
  • the control device 109 performs control so that the nail driver 100 is not driven.
  • the position of the compression piston 133 cannot be accurately detected due to a malfunction of the magnetic sensor 150, a problem may occur in the launching operation. For example, when the compression piston 133 is not stopped at the bottom dead center, when the launching operation is started, the compression amount of the compressed air generated by the compression piston 133 differs depending on the position of the compression piston 133 at the start of the launching operation. . For this reason, the speed of the nail to be launched for each launch operation is not constant, and the amount of nail to be driven into the workpiece is different.
  • a voltage sensor 160 and a current sensor 161 for detecting the voltage value and current value of the electric motor 111 are provided.
  • the relationship between the current value, voltage value, and rotational speed of the electric motor 111 is uniquely determined by the configuration of the electric motor 111 as drive characteristics of the electric motor 111. Therefore, the control device 109 calculates the rotation speed of the electric motor 111 from the voltage value and current value detected by the voltage sensor 160 and the current sensor 161. Furthermore, the control device 109 calculates the estimated angular velocity of the crankshaft 115a from the rotation speed of the electric motor 111 and the reduction ratio of the reduction mechanism 113.
  • This crankshaft 115a is an implementation structural example corresponding to the "crank member" in this invention.
  • the voltage sensor 160 and the current sensor 161 that detect the voltage value and the current value, which are the operating states of the electric motor 111 are implementation configuration examples corresponding to the “second sensor” in the present invention. That is, the “second sensor” has two sensors. Further, the estimated angular velocity of the crankshaft 115a calculated based on the detection results of the voltage sensor 160 and the current sensor 161 is an implementation configuration example corresponding to the “estimated crank state information value” in the present invention.
  • control device 109 calculates the angular velocity of the crankshaft 115a based on the position (detection result) of the crankshaft 115a detected by the magnetic sensor 150 every predetermined time.
  • the angular velocity of the crankshaft 115a calculated based on the detection result of the magnetic sensor 150 is an implementation configuration example corresponding to the “state information value” in the present invention.
  • the control device 109 calculates the difference between the angular velocity of the crankshaft 115a calculated based on the detection result of the magnetic sensor 150 and the estimated angular velocity of the crankshaft 115a calculated based on the detection results of the voltage sensor 160 and the current sensor 161. Is calculated.
  • the control device 109 indicates that any one of the magnetic sensor 150, the voltage sensor 160, and the current sensor 161 has failed. Assuming that the supply of electric current to the electric motor 111 is stopped. That is, the control device 109 stops driving the electric motor 111.
  • the voltage sensor 160 and the current sensor 161 may detect not only the voltage value and current value of the electric motor 111 but also the voltage value and current value of the driving circuit of the nailing machine 100. In such a configuration, not only the failure of the sensor but also the failure of the control device 109 or the like can be detected.
  • the second embodiment differs from the first embodiment in “motor”, “second sensor”, and “state information value” and “estimated crank state information value” calculation methods.
  • the description of the same configuration as in the first embodiment is omitted.
  • a brushless motor 211 is used as a motor.
  • the stator has a stator coil.
  • a position sensor 260 for detecting the position of the rotor is disposed outside the rotor of the brushless motor 211.
  • the position sensor 260 is arranged at three positions at predetermined positions in the circumferential direction of the rotor. Then, the control device 109 controls the drive of the brushless motor 211 by energizing the stator coil in accordance with the position of the rotor detected by the position sensor 260. In FIG. 10, the position sensor 260 is simply illustrated.
  • the control device 109 calculates the estimated position of the crankshaft 115a based on the position of the rotor detected by the position sensor 260. On the other hand, the position of the crankshaft 115 a is detected by the magnetic sensor 150. Then, the control device 109 calculates the difference between the position of the crankshaft 115a based on the detection result of the magnetic sensor 150 and the estimated position of the crankshaft 115a calculated based on the detection result of the position sensor 260. When the difference between the position of the crankshaft 115a and the estimated position exceeds a predetermined threshold value, the control device 109 regards that either the magnetic sensor 150 or the position sensor 260 has failed, and the brushless motor The supply of current to 211 is stopped. That is, the control device 109 stops driving the brushless motor 211.
  • the control device 109 can calculate the estimated position of the crankshaft 115a based on the detection result of the position sensor 260 used to drive the brushless motor 211. Thereby, a failure is detected in either the magnetic sensor 150 or the position sensor 160. That is, the position sensor 260 has both a function for driving the brushless motor 211 and a function for detecting a failure of the magnetic sensor 150.
  • the control device 109 turns on the LEDs 107 and 108 when driving of the electric motor 111 and the brushless motor 211 is stopped. Thereby, it is notified that the driving of the electric motor 111 is stopped.
  • the control device 109 may not only light the LEDs 107 and 108 but also blink them.
  • the control device 109 may be configured to change the color of light emitted by the LEDs 107 and 108. Further, the control device 109 may be configured to turn on or blink only one of the LEDs 107 and 108.
  • the magnetic sensor 150 that directly detects the position and angular velocity of the crankshaft 115a and the position and angular velocity of the crankshaft 115a are indirectly detected.
  • a voltage sensor 160, a current sensor 161, and a position sensor 260 for detection are included. Therefore, the magnetism is determined based on the difference between the position and angular velocity of the crankshaft 115a based on the detection result of the magnetic sensor 150 and the estimated position and angular velocity of the crankshaft 115a based on the detection results of the voltage sensor 160, current sensor 161, and position sensor 260.
  • Whether or not the sensor 150 is operating normally can be detected. Thereby, when abnormality occurs in the magnetic sensor 150, the driving of the nail driver 100 is stopped. That is, in the nailing machine 100, the nail is prevented from being unintentionally driven out.
  • the voltage sensor 160 and the current sensor 161 are provided, but the present invention is not limited to this. If the resistance value of the electric motor 111 is set in advance, only one of the voltage sensor 160 and the current sensor 161 may be provided. That is, the current value and voltage value of the electric motor 111 are detected by calculating the current value or voltage value according to Ohm's law.
  • the position (rotational position) of the rotor of the brushless motor 211 is detected, but the present invention is not limited to this.
  • the rotational position of the speed reduction mechanism 113 that reduces the rotational speed of the motor may be detected.
  • the rotational position of the speed reduction mechanism 113 since the rotational speed of the motor is decelerated, the rotational position of the speed reduction mechanism 113 is detected with higher accuracy than when the position of the rotor is detected.
  • control device 109 is configured to calculate the estimated angular velocity of the crankshaft 115a or the estimated position of the crankshaft 115a, but is not limited thereto.
  • control device 109 may be configured to calculate the estimated angular acceleration of the crankshaft 115a.
  • the control device 109 may be configured to calculate the estimated angular acceleration of the crankshaft 115a from the detection result of the magnetic sensor 150.
  • the LEDs 107 and 108 are provided as notification means. However, only one LED may be provided. Further, a buzzer for generating sound or an actuator for generating vibration may be provided as the notification means.
  • the magnetic sensor 150 for detecting the position of the crankshaft 115a is provided.
  • a sensor such as a photosensor may be provided.
  • each component of this embodiment shows an example of the form for implementing this invention, and this invention is not limited to the structure of this embodiment.
  • the control device 109 is an example of a configuration corresponding to the “controller” of the present invention.
  • the electric motor 111 is an example of a configuration corresponding to the “motor” of the present invention.
  • the crankshaft 115a is an example of a configuration corresponding to the “crank member” of the present invention.
  • the compression piston 133 is an example of a configuration corresponding to the “piston” of the present invention.
  • the magnetic sensor 150 is an example of a configuration corresponding to the “first sensor” of the present invention.
  • the voltage sensor 160 is an example of a configuration corresponding to the “second sensor” of the present invention.
  • the current sensor 161 is an example of a configuration corresponding to the “second sensor” of the present invention.
  • the brushless motor 211 is an example of a configuration corresponding to the “motor” of the present invention.
  • the position sensor 260 is an example of a configuration corresponding to the “second sensor” of the present invention.

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  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Abstract

Selon l'invention, une machine à clouer (100) comprend : un moteur électrique (111); un vilebrequin (115a) entraîné par le moteur électrique (111); un piston (133) entraîné par le vilebrequin (115a); un dispositif de commande (109) qui commande le moteur électrique (111); un capteur magnétique (150) qui détecte la position du vilebrequin (115a); et un capteur de tension (160) et un capteur de courant (161) pour détecter l'état fonctionnel du moteur électrique (111). Le dispositif de commande (109) est conçu de manière à calculer la vitesse angulaire estimée du vilebrequin (115a) correspondant à l'état du vilebrequin (115a) en fonction des résultats de détection du capteur de tension (160) et du capteur de courant (161). Le dispositif de commande (10) arrête également l'entraînement par le moteur électrique (111) lorsque la différence entre la vitesse angulaire estimée et la vitesse angulaire du vilebrequin (115a), sur la base des résultats de détection du capteur magnétique (150), dépasse un seuil prédéterminé.
PCT/JP2013/078383 2012-10-19 2013-10-18 Outil d'enfoncement WO2014061807A1 (fr)

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JP7413856B2 (ja) * 2020-03-16 2024-01-16 工機ホールディングス株式会社 作業機

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US10131047B2 (en) 2012-05-08 2018-11-20 Makita Corporation Driving tool
US10272553B2 (en) 2012-11-05 2019-04-30 Makita Corporation Driving tool
US9943952B2 (en) 2013-12-11 2018-04-17 Makita Corporation Driving tool
US10286534B2 (en) 2014-04-16 2019-05-14 Makita Corporation Driving tool
CN105082061A (zh) * 2014-05-05 2015-11-25 北京大风时代科技有限责任公司 电磁钉枪
WO2015169170A1 (fr) * 2014-05-05 2015-11-12 北京大风时代科技有限责任公司 Pistolet à clous électromagnétique
CN105082062A (zh) * 2014-05-05 2015-11-25 北京大风时代科技有限责任公司 电磁钉枪
CN105082065A (zh) * 2014-05-05 2015-11-25 北京大风时代科技有限责任公司 电磁钉枪
EP3476543A1 (fr) * 2017-10-26 2019-05-01 Max Co., Ltd. Outil et outil électrique
US11011031B2 (en) 2017-10-26 2021-05-18 Max Co., Ltd. Tool and electric tool
US11110577B2 (en) 2017-11-16 2021-09-07 Milwaukee Electric Tool Corporation Pneumatic fastener driver
US11897106B2 (en) 2017-11-16 2024-02-13 Milwaukee Electric Tool Corporation Pneumatic fastener driver
US11819989B2 (en) 2020-07-07 2023-11-21 Techtronic Cordless Gp Powered fastener driver
US20220355453A1 (en) * 2021-05-10 2022-11-10 Max Co., Ltd. Driving tool
US11850714B2 (en) 2021-07-16 2023-12-26 Techtronic Cordless Gp Powered fastener driver

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