JP2004283980A - Electric wrench - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technique wherein opening phases of a socket opening and a head opening in an electric wrench are easily adjusted. <P>SOLUTION: The electric wrench 101 comprises: a motor; a body section 103 for storing the motor; a driving control means of the motor; a head section 109 connected to the body section 103 and having the head opening 111; and a socket 141 that is disposed rotatably in the head section 109, has the socket opening 143 facing the head opening 111, and performs fastening work of a workpiece by being rotated in the head section 109 by driving of the motor. The motor driving control means is constituted so that the motor is driven to turn the socket 141 so that the socket opening 143 faces the head opening 111 in a state of the workpiece being separated from the socket 141. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electric wrench and, more particularly, to a technique that makes it possible to easily remove an electric wrench from a nut tightening operation site when the nut tightening operation is completed.
[0002]
[Prior art]
As an electric wrench used for a nut tightening operation, a main body containing a motor, a head connected to the main body and having a head opening, and a socket rotatably provided on the head are provided. Known structures are known. A socket opening is formed in the socket, and the nut inserted into the socket receives a tightening torque when the socket rotates in the head via a motor.
[0003]
In the conventional electric wrench, the rotation of the socket portion is stopped when the tightening operation is completed, so that the socket opening accommodating the nut may not face the head opening. If the opening phases of the socket opening and the head opening do not match, in the conventional electric wrench, the motor is driven in reverse to rotate the socket until the socket opening reaches a position facing the head opening. According to this method, in order to match the opening phases of the socket opening and the head opening, a complicated operation of performing a reverse rotation driving operation of the motor every time the fastening operation is completed is required, and there is room for improvement.
[0004]
[Patent Document 1]
JP 2000-190247 A
[0005]
[Problems to be solved by the invention]
The present invention has been made in view of such a point, and an object of the present invention is to provide a technique capable of easily adjusting the opening phases of a socket opening and a head opening in an electric wrench.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the invention described in each claim is configured.
According to the first aspect of the present invention, an electric wrench having a motor, a main body, motor drive control means, a head, and a socket is configured. The main body accommodates the motor. The head is connected to the main body and has a head opening. The head portion may be directly connected to the main body portion, or may be indirectly connected via a gear housing or the like that accommodates a transmission mechanism that changes and transmits the rotation of the motor or another functional member. The main body and the head may be connected in a straight line or may be connected in an intersecting manner. The socket is rotatably provided in the head portion and is configured to have a socket opening facing the head opening. The motor is rotated in the head by the driving of the motor, so that the work to be mounted on the socket is tightened. Typically, in a state where the socket opening faces the head opening, in other words, in a state where the opening phases of the socket opening and the head opening match, an object to be worked such as a nut from the outside of the electric wrench. By disposing the work object in the socket and rotating the socket in the head in this state, the work object is tightened to the adherend. The head opening and the socket opening are preferably set to dimensions allowing insertion and engagement of the work object, respectively.
[0007]
The motor drive control means in the present invention is configured to, when the work object is removed from the socket, drive the motor so that the socket opening faces the head opening to rotate the socket. By rotating the socket, the socket opening faces the head opening, that is, the opening phases of both openings match, and, for example, when the tightening work is completed, the electric wrench is used to tighten the work area. It can be easily removed from the device. In particular, when the work to be tightened is to be attached to a long object, for example, when performing the work of tightening a nut in a pipe-like structure, when the opening phases of the socket opening and the head opening match. This is useful because the electric wrench can be removed only in the radial direction of the work object.
[0008]
According to the present invention, when the work target is set in a state of being detached from the socket, the motor drive control means drives the motor so that the socket opening faces the head opening and rotates the socket easily. A state where the electric wrench can be removed from the work object is obtained. In particular, in the present invention, when the work object is detached from the socket, the phase of the opening is automatically adjusted through the motor drive by the motor drive control means, for example, by a mechanical means such as an urging spring or a floating piece. Compared to a configuration in which the socket is rotated, the phases of both openings can be adjusted with a simpler structure, which is reasonable. The motor drive control means according to the present invention includes a motor drive control unit for performing a nut tightening operation, and a motor drive control unit for performing socket rotation when the nut is removed from the socket. It may be set separately, or one motor drive control unit may perform drive control at the time of fastening work and socket rotation control at the end of work.
[0009]
(Invention of claim 2)
According to the second aspect of the present invention, in the electric wrench according to the first aspect, the first detecting means for detecting a state in which the work object is detached from the socket, and the relative position between the socket opening and the head opening. And a second detecting means for detecting a physical positional relationship. When the first detecting means detects that the work object has detached from the socket, the motor drive control is performed until the second detecting means detects that the socket opening faces the head opening. Means drives the motor to rotate the socket. In other words, the detachment of the work object from the socket and the adjustment of the opening phase of the socket opening and the head opening can be automatically performed in cooperation with the respective detecting means. It has become possible to further improve.
[0010]
(Invention of claim 3)
According to the third aspect of the present invention, in the electric wrench according to the first or second aspect, the first opening and the second opening of the electric wrench may be configured such that when the work object is detached from the socket, the socket opening is closed. It is configured to further include a single switch for detecting that the opening phases of the head openings match. "Single switch" means that the switch that is turned on when the work object is placed in the socket and the switch that detects that the opening phase of the socket opening matches the opening phase of the head opening are the same. , Does not prevent that another detection switch is arranged. According to the present invention, the work object is detached from the socket, so that the opening phases of the socket opening and the head opening can be automatically matched, and a structure for constructing such an automatic mechanism. Can be simplified as much as possible.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
(First Embodiment)
Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS. As shown in FIG. 1, the electric wrench 101 according to the present embodiment generally includes a main body 103 having a motor housing 105 and a gear housing 107, and a main body 103 on the side of the gear housing 107. And a head section 109 which is connected and has a head opening section 111. Further, a circuit cover 115 and an angle head cover 117 are arranged below the head unit 109 in this order from the outside.
[0012]
The motor housing 105 houses a motor 121 for driving the electric wrench 101. Although not shown, the motor 121 is driven and controlled by a drive control unit 160 upon receiving a drive current from a battery housed in a battery pack detachably attached to the rear end of the motor housing 105.
[0013]
When the motor 121 is energized and driven, the drive shaft 123 of the motor is rotated, and the rotation of the drive shaft 123 is transmitted to the spindle 131 via the reduction mechanism 125 mainly composed of the planetary gear 125a and the clutch 127. The rotation of the spindle 131 is transmitted to the first spur gear (spur gear) 135 via the bevel gears 133 and 133, and rotates the spur gear 135 in a horizontal plane.
[0014]
In particular, as best shown in FIG. 2, first to fifth spur gears 135, 136, 137, 138, and 139 are disposed on the head unit 109, and the rotation of the first spur gear 135 is controlled by the second and the second spur gears 135. The third spur gears 136 and 137 are sequentially transmitted, and further transmitted to the socket 141 through fourth and fifth spur gears 138 and 139 arranged in parallel to rotate the socket 141 in a horizontal plane. The first to fifth spur gears 135 to 139 and the outer periphery of the socket 141 are appropriately formed with meshing teeth for transmitting rotational torque.
[0015]
The socket 141 has a cutout socket opening 143 formed so as to face the head opening 111. A nut 151 is removably inserted into the socket opening 143. The socket 141 is rotatable (spinning) in the head portion 109, but with the rotation of the socket 141, a state in which the socket opening 143 faces the head opening 111 and a state in which the socket opening 143 does not face appear alternately. It will be. FIG. 2 shows a state in which the socket opening 143 faces the head opening 111, that is, a state in which the socket 141 is stationary with the opening phases of both the socket opening 143 and the head opening 111 matched.
[0016]
In the present embodiment, as shown in FIGS. 3 and 4, a first detection for detecting whether nut 151 is inserted into socket opening 143 between circuit cover 115 and angle head cover 117. Means 161 are arranged. The first detecting means 161 is mainly composed of a rod member 163, a first switch 165, and a harness 167.
[0017]
The rod member 163 extends in the long axis direction (the left-right direction in the drawing) of the main body 103, and has a distal end protruding from the socket opening 143 and the other end of the first switch 165. It is arranged so as to contact the switch part 165a. When the nut 151 is inserted through the socket 141, the rod member 163 is pushed by the nut 151 and moves in the direction of the first switch 165 (rightward in the drawing), whereby the switch portion 165a is pushed and the first switch 165a is pushed. The switch 165 is turned on. Further, the first switch 165 is electrically connected to the drive control unit 160 shown in FIG. 1 through a harness 167.
[0018]
Further, in the present embodiment, as shown in FIG. 2, whether socket opening 143 faces head opening 111, in other words, whether the opening phases of socket opening 143 and head opening 111 match. A second detecting means 171 for detecting whether or not there is no information is set. The second detecting means mainly includes a rod member 173, a second switch 175, and a harness 277.
[0019]
The rod member 173 extends orthogonally to the long axis direction of the main body 103 (vertical direction in FIG. 2), and is arranged such that the tip end faces the second spur gear 136 and the other end thereof. The second switch 175 is disposed so as to be in contact with the switch section 175a. On the other hand, a concave portion 136a for detection is formed in the second spur gear 136, and the rod member 173 has a second spur gear 136 except for a case where its tip end is engaged with the concave portion 136a. Of the second switch 175 (downward in FIG. 2). In this case, the switch unit 175a is pressed, and the second switch 175 is turned on. Conversely, when the distal end of the rod portion 173 engages with the concave portion 136a, the rod member 173 moves in a direction away from the second switch 175, and the second switch 175 is turned off (the closed state is turned on). Will be released).
[0020]
In the present embodiment, in the second spur gear 136, when the recess 136a is engaged with the rod member 173, the socket opening 143 faces the head opening 111, that is, the two openings 143, 111 Are set so as to match the aperture phases. Further, the second switch 175 is electrically connected to the drive control means 160 shown in FIG.
[0021]
The electric wrench 101 according to the present embodiment is configured as described above. Next, the operation and usage of the electric wrench 101 will be described.
As shown in FIG. 5, an electric wrench 101 according to the present embodiment is configured such that a long automobile pipe member, for example, an anti-brake lock device (ABS) pipe 153 (hereinafter referred to as an ABS pipe) is a nut 151 in an automobile factory. It is used for the work of tightening and joining.
[0022]
When the nut 151 is inserted and arranged in the socket opening 143 of the electric wrench 101 in order to start the tightening operation of the nut 151, as shown in FIGS. It is pushed by the nut 151 and moves to the first switch 165 side, and pushes the switch part 165a. As a result, the first switch 165 is turned on. When the first switch 165 is turned on, the electric wrench 101 is in the normal drive mode. In this state, the user operates the trigger switch 162 shown in FIG. By the operation of the trigger switch 162, a drive current is supplied from the battery side, and the motor 121 is driven via the drive control means 160.
[0023]
The rotation torque of the motor 121 is transmitted to the socket 141 via the drive shaft 123, the speed reduction mechanism 125, the clutch 127, the spindle 131, the bevel gear 133, and the first to fifth spur gears 135 to 139. Is driven to rotate. When the socket 141 is rotationally driven, the nut 151 inserted into the socket opening 143 is rotated, so that the pipe member 153 shown in FIG. 5 is tightened.
[0024]
Since the second spur gear 136 shown in FIG. 2 is driven to rotate during the tightening operation of the nut 151, the detecting concave portion 136 a formed in the second spur gear 136 is provided in the rod member 173 of the second detecting means 171. It is located periodically and intermittently, and the second switch 175 is intermittently turned on. However, in the normal drive mode, when the first detection unit 161 is turned on, the electric wrench 101 rotates the socket 141 in response to the on / off operation of the trigger switch 162 regardless of whether the second switch 175 is turned on. Drive.
[0025]
When the tightening of the nut 151 is completed, the tightening torque of the nut 151 (the tightening reaction torque received by the socket 141 from the nut 151 side during the tightening operation of the nut 151) increases. When the tightening torque of the nut 151 exceeds a predetermined range, in other words, when the torque exceeds a predetermined set torque, the clutch teeth on the side transmitting the drive torque of the motor 121 are disengaged from the clutch teeth on the side receiving the drive torque. The meshing engagement of the clutch teeth is released in a manner of riding on the teeth. By operating the clutch 127 in this manner, transmission of the driving torque of the motor 121 to the socket 141 is interrupted.
[0026]
The disengagement of the clutch teeth in the clutch 127 is detected by a microswitch (not shown), and the drive control unit 160 stops driving the motor 121. When the driving of the motor 121 is stopped, the tightening operation of the nut 151 ends. When the driving of the motor 121 is stopped, the tightening torque of the nut 151 is released, so that the clutch teeth of the clutch 127 return to the state of being engaged and engaged again.
[0027]
When the clutch 127 is actuated and the nut 151 is tightened, the operator moves the electric wrench 101 from the position “A” shown in FIG. 5 to the position “B” in the longitudinal direction of the ABS pipe 153 (the nut). The nut 151 disposed in the socket 141 is pulled out while moving the nut 151 in the direction of travel by tightening the nut 151). 3 and FIG. 4, when the nut 151 comes out of the socket 141, the pressing by the nut 151 is released, and the rod member 163 is separated from the first switch 165 (in the leftward direction in FIGS. 3 and 4). ). As a result, the pressing of the rod member 163 on the switch section 165a is released, and the first switch 165 is turned off (the closed state is released).
[0028]
When the first switch 165 is turned off, the drive control unit 160 (see FIG. 1) operates until the second switch 175 of the second detection unit 171 shown in FIG. 2 is turned off (the closed state is released). ), The motor 121 is further driven. That is, the motor 121 is driven to rotate the second spur gear 136 until the distal end of the rod member 173 engages with the detecting recess 136a of the second spur gear 136. In the present embodiment, as described above, the socket opening 143 is set to face the head opening 111 when the rod member 173 and the recess 136a are in a positional relationship of engagement. That is, when the nut 151 is removed from the socket 141 and the first switch 165 is turned on, the opening phases of the head opening 111 and the socket opening 143 are changed until the second switch 175 is turned off. The motor 121 is rotationally driven until it reaches the coincidence.
[0029]
When the socket opening 143 faces the head opening 111, the operator detaches the ABS pipe 153 from the socket 141 through the socket opening 143 and the head opening 111 whose opening phases match, and moves the electric wrench 101 in FIG. Is pulled out from the position B to the position C, thereby completing the tightening operation of the nut 151.
[0030]
According to the present embodiment, the operation of detaching nut 151 from socket 141 is detected by first detecting means 161, so that drive control means 160 drives the motor and the opening of socket opening 143 and head opening 111 is performed. Perform phase adjustment. Thereby, when the tightening work of the nut 151 is completed, a state is obtained in which the opening phases of the socket opening 143 and the head opening 111 match, so that the electric wrench 101 can be easily removed from the work site. . Furthermore, since the state where the socket opening 143 faces the head opening 111 at the end of the operation is automatically obtained, the nut 151 or the ABS pipe 153 can be easily guided to the socket 141 at the time of the next operation.
[0031]
Moreover, in the present embodiment, in order to match the opening phases of the socket opening 143 and the head opening 111, an operator rotates the motor 121 in the reverse direction and adjusts the socket 141 backward, or adjusts the spur gears 135 to 139. There is no need to separately dispose an urging spring, a floating piece, or the like, and simply release the nut 151 from the socket 141 at the end of the operation, and the drive control means 160 will not move until the socket opening 143 faces the head opening 111. Drives the motor 121 to automatically obtain a state in which the opening phases of both the openings 143 and 111 match, so that the highly practical electric wrench 101 with a simple structure can be obtained.
[0032]
(Second embodiment of the present invention)
Next, a second embodiment of the present invention will be described. The second embodiment relates to a change in a mechanism for detecting detachment of the nut 151 from the socket 141 and detecting an opening phase of the socket opening 143 and the head opening 111 in the first embodiment. Therefore, detailed description of elements equivalent to those in the first embodiment will be omitted.
[0033]
FIGS. 6 and 7 show the configuration of the aperture phase adjusting means 261 according to the second embodiment. The opening phase adjusting means 261 mainly includes a nut detecting lever 263, an opening phase adjusting pin 265, a motion conversion mechanism 267, and a detection switch 269.
[0034]
The nut detecting lever 263 is rotatable around the hinge 263a, and is normally urged counterclockwise (counterclockwise) in FIG. 6 via an urging spring 264. As a result, the tip 263b of the nut detection lever 263 projects into the socket 241. On the other hand, when the nut is arranged in the socket 241, the tip 263b is pressed by the nut as shown in FIG. 8, so that the nut detecting lever 263 resists the urging force of the urging spring 264. Then, it rotates clockwise about the hinge 263a (the rotation direction is indicated by the symbol D in FIG. 8). As a result, the lever other end 263c moves the motion conversion mechanism 267 horizontally in the drawing (indicated by reference numeral E in FIG. 8), and the switch 269a of the detection switch 269 is turned on. As shown in FIG. 7, the end of the nut detection lever 263 on the side facing the switch portion 269a branches in a forked shape in plan view, and each branch leg contacts the motion conversion mechanism 267. Is configured. Accordingly, it is possible to prevent the pressing force of the nut detecting lever 263 from being locally concentrated on a predetermined portion of the motion conversion mechanism 277, and to ensure the smoothness of the closing operation of the switch portion 269a by the nut detecting lever 263. You.
[0035]
That is, in the present embodiment, when a nut is arranged in the socket 241, the nut detecting lever 263 is pressed by the nut and rotates in the D direction, and the detection switch 269 is turned through the motion conversion mechanism 267. throw into. On the other hand, when the nut is detached from the socket 241, the nut detection lever 263 is rotated in the direction opposite to the direction D, and the detection switch 269 is turned off.
[0036]
On the other hand, as shown in FIGS. 9 and 10, the opening phase adjustment pin 265 is arranged in a fitting manner in a groove 237 a formed on the upper surface of the third spur gear 237. A projection 237b is formed in the groove 237a, and when the third spur gear 237 rotates and the projection 237b is located at the position where the opening phase adjustment pin 265 is arranged, the opening phase adjustment pin 265 moves upward. 9 (shown by reference numeral F in FIG. 9), and the inclined surface portion 265a formed on the upper end side moves the above-mentioned motion conversion mechanism 267 horizontally (shown by reference numeral G in FIG. 10). , The switch section 269a of the detection switch 269 is turned on. The protrusion 237b is formed on the groove 237a of the third spur gear 237 so as to engage with the opening phase adjustment pin 265 when the opening phases of the socket opening 243 and the head opening 211 match (see FIG. 7). Have been.
[0037]
That is, in the present embodiment, when the socket opening 243 faces the head opening 211, the opening phase adjustment pin 265 moves upward in the F direction by being pressed by the protrusion 237b, and the motion conversion mechanism 267 is pressed. The detection switch 269 is turned on through the switch. On the other hand, when the opening phases of the socket opening 243 and the head opening 211 do not match, the opening phase adjustment pin 265 does not move upward, and the detection switch 269 is turned off.
[0038]
According to the present embodiment configured as described above, the detection switch 269 is turned on when a nut is arranged in the socket 241 and / or when the socket opening 243 faces the head opening 211. On the other hand, when the nut is detached from the socket 241 and the opening phases of the socket opening 243 and the head opening 211 do not match, the detection switch 269 is turned off.
[0039]
Therefore, after the nut tightening operation is completed, the operator moves the electric wrench 201 from the position A to the position B in FIG. The distal end portion 263b of the lever 263 is allowed to protrude into the socket 241. As a result, the pressed state of the switch unit 269 through the motion conversion mechanism 267 is released. At this time, if the opening phases of the socket opening 243 and the head opening 211 do not match, the opening phase adjusting pin 265 is not in a state of pressing the switch unit 269 via the motion conversion mechanism 267. The detection switch 269 is turned off. In the present embodiment, a drive control unit (not shown) further drives the motor until the detection switch 269 is turned on.
[0040]
In the present embodiment, as described above, when the protrusion 237b formed in the groove 237a of the third spur gear 237 is located at the position where the opening phase adjustment pin 265 is disposed, the socket opening 143 becomes the head opening 111 Is set to face. That is, when the nut 251 is detached from the socket 241, the upward movement of the opening phase adjustment pin 265 causes the switch unit 269 to be pressed through the motion conversion mechanism 267 and the detection switch to be turned on. The motor is driven to rotate until the opening phases of the head opening 211 and the socket opening 243 match.
[0041]
As a result, the socket opening 243 faces the head opening 211, and the worker detaches the ABS pipe 153 shown in FIG. 5 in this state, and moves the electric wrench 201 from the position B shown in FIG. Then, the work is completed.
[0042]
According to the present embodiment, in addition to the effects of the first embodiment, in addition to the mechanism for detecting whether or not the nut has been detached from the socket 241, the opening of the socket opening 243 and the head opening 211 Since the mechanism for matching the phases can be constructed by the single detection switch 269, the structure of the electric wrench 201 can be simplified as much as possible.
[0043]
In the second embodiment, the detection switch 269 that is turned on when the opening phase of the socket opening 243 matches the opening phase of the head opening 211 when the nut is detached from the socket 241 is adopted. Alternatively, a detection switch that is turned off when the opening phases of the socket opening 243 and the head opening 211 match when the nut is detached from the socket 241 may be employed.
[0044]
In addition, in view of the gist of the present invention, the following various forms can be configured.
(Form 1)
"The electric wrench according to any one of claims 1 to 3, wherein an automobile pipe is joined by the nut tightening operation."
[0045]
According to the electric wrench of the first aspect, the electric wrench according to any one of claims 1 to 3 is used for joining pipes for automobiles in which a nut or an object to be tightened by the nut is often removed from a socket opening in a narrow space. Since the wrench is provided, the screw tightening operation can be performed rationally.
[0046]
(Form 2)
A motor, a main body for housing the motor, the motor drive control means, a head connected to the main body and having a head opening formed therein, and the head provided rotatably on the head; A method for using an electric wrench having a socket having a socket opening facing the opening and having a socket for performing a work of tightening a work object arranged in the socket by rotating in the head by driving the motor. hand,
When the tightening work is completed and the work object is detached from the socket, the motor drive control unit is used to drive the motor so that the socket opening faces the head opening, and the socket is closed. A method for using an electric wrench, comprising a step of rotating. "
[0047]
According to the second aspect of the present invention, there is provided an invention of a method of using an electric wrench having substantially the same configuration as the first aspect of the present invention. Of course, it is also possible to configure a method of using the electric wrench in which the characteristic components of the invention according to the other claims are appropriately combined.
[0048]
(Form 3)
"A method for using the electric wrench according to aspect 2,
A nut for pipe joining is arranged in the socket with the socket opening facing the head opening,
By turning on a trigger switch for energizing the motor, the motor drive control means drives the motor, whereby the socket is rotated, and a tightening operation of a nut arranged in the socket is performed.
If the nut tightening torque by the socket exceeds a predetermined range, the motor drive control means stops driving the motor,
In a state where the driving of the motor is stopped, the nut is detached from the socket in a longitudinal direction of the pipe,
When the nut is detached from the socket, the motor drive control means re-drives the motor so that the socket opening faces the head opening and rotates the socket, whereby the socket is rotated. Using the electric wrench, the step of removing the pipe from the pipe and removing the electric wrench from the pipe. "
[0049]
According to this specific application example, when performing the joining operation of the pipe by tightening the nut, not only effectively performing the fastening operation of the nut, but also at the end of the fastening operation, using the electric wrench from the pipe joint location. Since a structure that can be easily removed is automatically obtained, the screw tightening operation can be reasonably completed. In particular, this embodiment is useful for use in an automobile manufacturing line or the like which is often forced to work in a narrow space, for example, when performing joining work of an ABS pipe or the like in an automobile.
[0050]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the technique effective in easily adjusting the opening phase of a socket opening part and a head opening part in an electric wrench was provided.
[Brief description of the drawings]
FIG. 1 shows an overall configuration of an electric wrench according to an embodiment of the present invention.
FIG. 2 schematically shows a plan configuration of a head portion of the electric wrench according to the present embodiment and a structure of a second detecting means.
FIG. 3 shows a detailed sectional structure of a head portion of the electric wrench according to the present embodiment.
FIG. 4 schematically shows a structure of a first detecting means of the electric wrench according to the embodiment.
FIG. 5 schematically shows a specific example of removing the electric wrench during a nut tightening operation.
FIG. 6 shows a detailed cross-sectional structure of a head portion of an electric wrench according to a second embodiment of the present invention.
FIG. 7 schematically shows a plan configuration of a head portion of an electric wrench according to a second embodiment and a structure of a detection unit.
FIG. 8 shows a detailed configuration of a detection unit in the electric wrench according to the second embodiment.
FIG. 9 schematically shows a configuration of a third spur gear according to the second embodiment.
FIG. 10 shows a detailed configuration of an opening phase adjusting mechanism of a socket opening and a head opening in a second embodiment.
[Explanation of symbols]
101 Electric wrench
103 body
105 Motor housing
107 gear housing
109 Head
111 Head opening
115 Circuit cover
117 Angle Head Cover
121 motor
123 Motor drive shaft
125 Reduction mechanism
125a planetary gear
127 clutch
131 spindle
133 Bevel Gear
135 first spur gear
136 2nd spur gear
136a recess
137 3rd spur gear
138 4th spur gear
139 Fifth Spur Gear
141 socket
143 socket opening
151 nut
153 ABS pipe
160 drive control means
161 first detection means
163 Rod member
165 1st switch
167 harness
171 Second detecting means
173 Rod member
175 second switch
177 harness
261 Aperture phase adjusting means
263 Nut detection lever
265 Aperture phase adjustment pin
267 Motion conversion mechanism
269 Detection switch

Claims (3)

Motor and
A main body for housing the motor,
Drive control means for the motor,
A head portion connected to the main body portion and having a head opening formed therein,
An electric motor having a socket opening rotatably provided in the head portion and facing the head opening portion, and having a socket for performing a work of fastening a work object by rotating in the head portion by driving the motor. A wrench,
The motor drive control means drives the motor to rotate the socket such that the socket opening faces the head opening when the work object is detached from the socket. Electric wrench. The electric wrench according to claim 1,
First detection means for detecting a state in which the work object is detached from the socket;
A second detection unit that detects a relative positional relationship between the socket opening and the head opening,
When it is detected by the first detection means that the work object has detached from the socket, until the second detection means detects that the socket opening faces the head opening. An electric wrench, wherein the motor drive control means drives the motor to rotate the socket. The electric wrench according to claim 1 or 2,
The first detection means and the second detection means each include a single switch for detecting that the opening phases of the socket opening and the head opening coincide with each other when the work object is detached from the socket. An electric wrench comprising:

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