JP5088614B2 - Electric tool - Google Patents

Description

  The present invention relates to a power tool such as an angle driver in which a motor and a power transmission mechanism that transmits power of the motor to a tip tool are housed in a housing.

  A rotary impact tool as one form of an electric tool is a tool that generates rotational impact force using a motor as a drive source to rotate a tip tool, and intermittently applies impact force to this to perform operations such as screw tightening. However, it is widely used at present because of its features such as small recoil and high tightening ability. Such a rotary impact tool includes an angle driver that has been devised to solve such a problem that a screw tightening operation cannot be performed with a normal tool because it is a narrow place.

  The angle driver employs a structure in which a bevel gear is arranged between the motor and the hammer or between the hammer and the tip tool to change the direction of torque transmission by 90 °. If you want to increase the tightening torque, A bevel gear is disposed between the hammer and the hammer, and when it is desired to reduce the center height, the bevel gear is disposed between the hammer and the tip tool.

  Important points when using this type of angle driver are that the center height is reduced, that the tightening torque is increased, and that there is a relatively large amount of work in the dark, so an illuminator is required. Etc. And in this angle driver, the lever switch is employ | adopted so that it can operate | work by grasping a front-end part and a rear-end part during an operation | work.

By the way, in Patent Document 1, an illuminating body such as an LED can be arranged without affecting the mounting position and attachment / detachment of the motor, and the rear side of the spindle from the front end to the projecting side (lower surface) of the spindle on the side of the motor housing. a notch directed and formed by fitting the light unit in this notch, configuration in which the illuminating body such as an LED has been proposed a projection portion of the light unit.

  However, the configuration proposed in Patent Document 1 has a problem in that a light unit separate from the motor housing is necessary, so that the number of parts increases and a notch needs to be formed in the motor housing. In addition, since an illuminating body such as an LED is not disposed at a position for directly illuminating a tip tool, a tapping screw or the like, it is necessary to use a plurality of LEDs having a high luminous intensity and a large irradiation angle as the illuminating body.

  The present invention has been made in view of the above problems, and the object of the present invention is to efficiently illuminate a necessary place with a simple configuration without causing an increase in the number of parts, etc., and work in a dark place with good workability. It is in providing the electric tool which can be performed.

To achieve the above object, the present invention provides a motor housing having a motor shaft, an output shaft extending in a direction substantially orthogonal to the motor shaft, and a power transmission mechanism for transmitting the power of the motor to the output shaft. An angle tool comprising: a metal hammer case connected to the tip of the housing ; and an LED light provided on the housing, wherein the LED light has an axial direction of the motor shaft and an output shaft. The tip tool is disposed so as to be sandwiched between the housing other than the virtual surface formed by the axial direction and the hammer case, and the center axis of the LED light intersects the virtual surface and the motor shaft. It is characterized by facing.

  According to the first aspect of the present invention, since the LED light is arranged on the side surface of the housing, there is no need for a special part for attaching the LED light to the housing, and the housing needs to be specially processed. In addition, the LED light can be attached to the side surface of the housing with a simple configuration without increasing the number of parts. Further, since the LED light is arranged in the direction in which the central axis faces the tip tool, the machining position in the vicinity of the tip tool can be efficiently illuminated, and work in a dark place can be performed with good workability.

  According to the second aspect of the present invention, the LED light can be easily and reliably fixed to the side surface of the housing by passing the wiring of the LED light through the recess of the bush and sandwiching the bush between the housing and the case.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a side sectional view of an angle driver as an embodiment of an electric power tool according to the present invention, FIG. 2 is a side view of the tip of the angle driver, FIG. 3 is a bottom view of the angle driver, and FIG. 5A is a front view of the bush, FIG. 5B is a side view of the bush, and FIG. 6 is a partial perspective view showing the relationship between the wiring of the LED light and the bush. It is.

  The angle driver 1 according to the present embodiment is a cordless hand-held power tool that uses a battery 2 as a power source and a motor 3 as a drive source. The motor 3 drives the rotary striking mechanism and rotates the anvil 4. By giving the impact, the rotary impact force is intermittently transmitted to the tip tool (bit) 5 to perform operations such as screw tightening.

  Specifically, as shown in FIG. 1, the slide type battery 2 is attached to one end of a cylindrical elongated housing 6 of the angle driver 1, and the motor 3 is accommodated in the housing 6, A rotary impact mechanism is accommodated in front of the motor 3 (the upper side in FIG. 1 is the front). The housing 6 is made of resin and has a left and right divided structure as shown in FIG. 3, and a metal hammer case having a lateral L shape (angle shape) when viewed from the side is disposed inside the tip. Part of 7 is fitted and connected.

  In the rotary impact mechanism, the rotation of the output shaft (motor shaft) of the motor 3 is decelerated through the planetary gear mechanism 8 and transmitted to the spindle 9, and the spindle 9 is rotationally driven at a predetermined speed. Here, the spindle 9 and the hammer 10 are connected by a cam mechanism. The cam mechanism is formed on the V-shaped spindle cam groove 9 a formed on the outer peripheral surface of the spindle 9 and the inner peripheral surface of the hammer 10. The V-shaped hammer cam groove 10a and the balls 11 engaged with the cam grooves 9a and 10a are formed.

  Further, the hammer 10 is always urged by the spring 12 in the distal direction (upward in FIG. 1), and at a position separated from the end face of the anvil 4 by the engagement between the ball 11 and the cam grooves 9a and 10a when stationary. Thus, a minute gap is formed between the two. And although not shown in figure, the convex part which selectively engages is formed in two places on the rotation plane which the hammer 10 and the anvil 4 mutually oppose, respectively.

  One end (rear end) of an intermediate shaft 14 rotatably supported by two bearings 13 is spline-fitted to the shaft central portion of the anvil 4, and the other end (front end) of the intermediate shaft 14 is fitted to the other end (front end). A bevel gear 15 is integrally formed.

  The tip of the hammer case 7 is bent at a right angle downward, and the output shaft 16 is disposed at a right angle (perpendicular) to the intermediate shaft 14 at that portion. The output shaft 16 is rotatably supported at two axial points by bearings 17 and 18, and a bevel gear 19 is integrally formed at an intermediate portion thereof, and the bevel gear 19 is integrated with the bevel gear 15 of the intermediate shaft 14. Is engaged. The tip tool (bit) 5 is detachably attached to the output shaft 16.

  On the other hand, a lever switch 20 for turning on / off the power supply from the battery 2 to the motor 3 is accommodated behind the motor 3 in the housing 6, and an actuator 20 a of the lever switch 20 is provided on the housing 6. It penetrates the bottom and protrudes downward. When the operating element 20 a is pushed by the lever 21, the lever switch 20 is turned ON and power is supplied from the battery 2 to the motor 3. The lever 21 is arranged below the housing 6, and one end of the lever 21 is formed by the roll pin 22. 6 is pivotally mounted so as to be pivotable up and down.

  In the present embodiment, a substrate 24 is connected in series between the battery 2 and the lever 21, next to the battery terminal 23 inside the battery mounting portion formed integrally with the rear end portion of the housing 6. Has been placed.

  Thus, in the present embodiment, a recess 6a is formed in the front end portion of the side surface of the housing 6 as shown in FIGS. 2 and 3, and the LED light 25 is disposed in this recess. Here, as shown in FIG. 2, the LED light 25 is arranged in a direction in which the central axis (irradiation direction) L faces the tip tool 5, and is fixed to the side surface of the housing 6 by a fixing structure described below. ing.

That is, a resin bush 26 shown in FIG. 5 is used for fixing the LED light 25. Here, the bush 26 is a substantially cylindrical part, and a recess 26a on the rectangular groove is provided in the axial direction.

  As shown in FIGS. 4 and 6, the two wires 27 extending from the LED light 25 are introduced into the housing 6 through holes (not shown) formed in the side surface of the housing 6. 6 extends along the inner surface of the half-crack on the side where the LED light 25 is mounted, and its end is connected to the battery 2 via the lever switch 20.

  Thus, the LED light 25 is assembled when the angle driver 1 is assembled. At this time, as shown in FIG. 6, the two wires 27 extending from the LED light 25 are passed through the recess 26a of the bush 26, The LED light 25 is fixed to the side surface of the housing 6 by sandwiching the bush 26 between the hammer case 7 and the housing 6.

  Incidentally, as shown in FIG. 1, an operation panel 28 is provided on the surface of the housing 6 facing the lever 21 of the battery mounting portion, and this operation panel 28 is operated by the substrate 24 and remains in the battery 2. The amount is displayed, and whether the LED light 25 is turned on / off is displayed.

  In order to perform a screw tightening operation using the angle driver 1 configured as described above, the housing 6 is grasped and the lever 21 is pulled. Then, the lever 21 rotates about the roll pin 22 to the position of the broken line in FIG. 1 and presses the actuator 20a of the lever switch 20, so that the lever switch 20 is turned on and power is supplied from the battery 2 to the motor 3. 3 is activated.

  When the motor 3 is started as described above, the rotation of the output shaft (motor shaft) is decelerated by the planetary gear mechanism 8 and transmitted to the spindle 9, and the spindle 9 is rotationally driven at a predetermined speed. When the spindle 9 is rotationally driven in this way, the rotation is transmitted to the hammer 10 via the cam mechanism, and the convex portion of the hammer 10 is engaged with the convex portion of the anvil 4 before the hammer 10 is rotated halfway. The anvil 4 is rotated together. When the relative reaction occurs between the hammer 10 and the spindle 9 due to the reaction force of engagement at that time, the hammer 10 moves along the spindle cam groove 9a of the cam mechanism. Starts moving backward toward the motor 3 side while compressing.

  When the protrusion of the hammer 10 moves over the protrusion of the anvil 4 due to the backward movement of the hammer 10 and the engagement of both protrusions is released, the hammer 10 receives the spring 12 in addition to the rotational force of the spindle 9. While being accelerated rapidly in the rotational direction and forward by the action of the elastic energy accumulated in the cam and the cam mechanism, it moves forward by the urging force of the spring 12, and the convex portion re-engages with the convex portion of the anvil 4. Start to rotate together. At this time, a strong rotational impact force is applied to the anvil 4, and this rotational impact force is transmitted to the tip tool 5 through the intermediate shaft 14 and the output shaft 16, and the rotational impact force from the tip tool 5 to a screw (not shown). Is transmitted. Since the rotation of the intermediate shaft 14 is converted by 90 ° by the bevel gears 15 and 19 and transmitted to the output shaft 16, the output shaft 16 and the tip tool 5 mounted on the output shaft 16 are rotationally driven while maintaining a substantially vertical state. The

  Thus, the same operation as described above is repeated, and the rotational impact force is intermittently and repeatedly transmitted from the tip tool 5 to the screw, and the screw is screwed into the wood to be fastened.

  As described above, in the present embodiment, since the LED light 25 is disposed on the side surface of the housing 6, no special parts for attaching the LED light 25 to the housing 6 are required, and the housing 6 is specially processed. The LED light 25 can be attached to the side surface of the housing 6 with a simple configuration without increasing the number of parts.

  Further, since the LED light 25 is arranged in a direction in which the central axis thereof faces the tip tool 5, the machining position in the vicinity of the tip tool 5 can be efficiently illuminated, and work in a dark place can be performed with good workability.

  Furthermore, in the present embodiment, the LED light 25 is easily and reliably attached to the side surface of the housing 6 by passing the wiring 27 of the LED light 25 through the recess 26 a of the bush 26 and sandwiching the bush 26 between the housing 6 and the hammer case 7. Can be fixed to.

  In the above, the embodiment in which the present invention is applied to an angle driver has been described. However, the present invention is naturally applicable to other arbitrary electric tools as well.

It is side sectional drawing of the angle driver which concerns on this invention. It is a side view of the angle driver tip part concerning the present invention. It is a bottom view of the angle driver concerning the present invention. It is a partial inner surface figure of the motor housing which shows the fixation structure of the LED light in the angle driver which concerns on this invention. (a) is a front view of a bush, (b) is a side view of the bush. It is a fragmentary perspective view which shows the relationship between the wiring and bush of LED light in the angle driver which concerns on this invention.

Explanation of symbols

1 Angle driver (power tool)
2 Battery 3 Motor 4 Anvil 5 Tip tool 6 Housing 6a Housing recess 7 Hammer case (case)
8 planetary gear mechanism 9 spindle 9a spindle cam groove 10 hammer 10a hammer cam groove 11 ball 12 spring 13 bearing 14 intermediate shaft 15 bevel gear 16 output shaft 17, 18 bearing 19 bevel gear 20 lever switch 20a lever switch operator 21 lever 22 roll pin 23 battery Terminal 24 Substrate 25 LED light 26 Bush 26a Bush recess 27 Wiring 28 Operation panel L Center axis of LED light

Claims (1)

A motor having a motor shaft;
An output shaft that extends in a direction substantially orthogonal to the motor shaft and is fitted with a tip tool;
A housing that houses a power transmission mechanism that transmits the power of the motor to the output shaft;
A metal hammer case connected to the tip of the housing;
In an angle tool provided with an LED light provided in the housing,
The LED light is supported so as to be sandwiched between the housing other than the virtual surface formed by the axial direction of the motor shaft and the axial direction of the output shaft, and the hammer case . An angle tool, wherein a central axis is arranged so as to cross the virtual plane and the motor axis and face the tip tool.

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