JP2013031906A - Oscillating-rotary-type electric tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oscillating-rotary-type electric tool in which working efficiency is enhanced.SOLUTION: In the oscillating-rotary-type electric tool 1, an output shaft 22 rotated right and left in an oscillating fashion by the driving of a motor protrudes downward at the front end of a housing 10 which extends in the front-rear direction and houses the motor, and a tip tool 28 is connected to the tip of the output shaft where the axis 25 of the output shaft is inclined forward at a predetermined angle θ from a direction orthogonal to the front-rear-directed axis 26 of the housing. A battery 14 for supplying electrical power to the motor is also detachably attached to the rear end of the housing.

Description

  The present invention relates to a reciprocating rotary electric tool in which an output shaft that reciprocates left and right by driving a motor is protruded downward from a front end portion of a housing that houses a motor, and a tip tool is connected to the tip of the output shaft.

  For example, in Patent Document 1, a motor is housed in a housing extending in the front-rear direction, and an output shaft coupled with a tip tool is projected downward in a direction orthogonal to the front-rear axis of the housing from the front end portion of the housing. A reciprocating rotary power tool is disclosed. In this reciprocating rotary electric tool, the rotation of the motor is transmitted to the output shaft through the swing mechanism, and the swing mechanism can switch the rotational motion of the motor to a motion in which the output shaft reciprocates left and right. Has been made.

US Patent Application Publication No. 2010/0186980

  By the way, in the above-described reciprocating rotary power tool, for example, when surface polishing is performed on a workpiece such as a floor surface of a building, it is necessary to keep the housing parallel to the floor surface. If a member projecting a predetermined height from the floor surface is provided in the vicinity of the floor surface portion on which the surface polishing is desired, there is a disadvantage that the housing hits this member. In addition, there has been a disadvantage that the housing hits the floor surface even when performing surface polishing on the recessed portion of the floor surface. As a result, it has been feared that work such as surface polishing becomes difficult and workability is lowered.

  The present invention has been proposed in view of such circumstances, and an object thereof is to provide a reciprocating rotary electric tool with improved workability.

  The reciprocating rotary power tool according to the invention of claim 1 is configured such that an output shaft that reciprocates left and right by driving the motor is protruded downward at a front end portion of a housing that extends in the front-rear direction and accommodates the motor. A reciprocating rotary power tool in which a tip tool is connected to the tip of a shaft, wherein the axis of the output shaft is inclined forward by a predetermined angle from a direction orthogonal to the longitudinal axis of the housing. .

  The invention of claim 2 is characterized in that, in claim 1, a battery for supplying power to the motor is detachable at a rear end portion of the housing.

According to the reciprocating rotary power tool according to the first aspect of the present invention, for example, when surface polishing is performed on the workpiece with a tip tool, the housing is located above the position parallel to the polishing surface of the workpiece. It becomes possible to maintain an inclined state. Therefore, the distance between the polishing surface and the housing becomes wider than when the housing is kept parallel to the polishing surface. Therefore, the housing can be prevented from hitting a member protruding from the workpiece in the vicinity of the polishing surface, for example. Moreover, also when performing planar grinding | polishing with respect to the hollow part of a workpiece, it can prevent that a housing contacts the outer surface of the workpiece located in the housing side rather than a hollow part. As a result, workability such as planar polishing can be improved.
According to the second aspect of the present invention, for example, when performing the planar polishing, the battery is mounted on the rear end surface inclined upward from the position parallel to the polishing surface, so that the battery is polished or polished. Can be prevented from coming into contact with a member protruding from the workpiece. Therefore, the battery does not hinder polishing work or the like.

It is a side view of the reciprocating rotary electric tool of the embodiment of the present invention. It is a side view of the reciprocating rotary electric tool showing the internal structure of the front end portion of the housing. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2.

  An embodiment of the present invention will be described with reference to FIGS. A reciprocating rotary power tool 1 shown in FIGS. 1 and 2 includes a main body housing 10 having a circular cross section and extending in the front-rear direction of the reciprocating rotary power tool 1 (left-right direction in FIGS. 1 and 2). A grip 11 for a user to grip is formed on the outer periphery of the main body housing 10, and a motor (not shown) is accommodated in the main body housing 10. Further, the main body housing 10 is provided with a switch 12 capable of switching the motor between an on state and an off state. In addition, a battery mounting portion 13 is provided at the rear end portion of the main body housing 10. A battery pack 14 that supplies power to the motor when the switch 12 is on is detachably mounted on the battery mounting portion 13. The battery pack 14 is an example of the battery of the present invention.

  As shown in FIGS. 2 and 3, a shaft member 17 is connected to the front of the rotating shaft 15 of the motor in the main body housing 10 via a coupling member 16. The shaft member 17 is supported in a rotatable state in the main body housing 10 via bearings 18 and 19. An eccentric shaft portion 20 is formed at a substantially central portion in the axial direction of the shaft member 17. A bearing 21 whose outer ring has an arc shape is assembled to the eccentric shaft portion 20 in an exterior state.

  As shown in FIGS. 2 and 3, at the front end portion of the main body housing 10, the spindle 22 is supported in the main body housing 10 via bearings 23 and 24. As shown in FIG. 2, the axis 25 of the spindle 22 is inclined to the front side of the main body housing 10 by a predetermined angle θ (here, 5 degrees) from the direction orthogonal to the longitudinal axis 26 of the main body housing 10. The tip of the spindle 22 protrudes downward from the main body housing 10. Various types of tip tools having different shapes and applications such as cutting tools and polishing tools can be fixed to the tip of the spindle 22 with bolts 27, respectively. 1 and 2 show an example in which a cutting tool 28 having a fan shape in plan view is fixed to the spindle 22. The main body housing 10 is an example of the housing of the present invention, and the spindle 22 is an example of the output shaft of the present invention. The cutting tool 28 is an example of the tip tool of the present invention.

  Further, as shown in FIGS. 2 and 3, a link member 30 is supported between the shaft member 17 and the spindle 22 in the main body housing 10. The link member 30 includes a pair of engaging portions 32 and 32 and an arm portion 33. A pair of engaging parts 32 and 32 are arrange | positioned in the mutually parallel state on the outer side of the shaft member 17, as shown in FIG. A bearing 21 is disposed in a space between the engaging portions 32 and 32. The arm portion 33 protrudes from the main body of the link member 30 toward the spindle 22, and a spindle positioning hole 34 is formed in the arm portion 33. The spindle 22 is press-fitted into the spindle positioning hole 34.

  Next, the operation | movement which cut | disconnects the pillar material standingly arranged on the floor surface as an example using the reciprocating rotary electric tool 1 is demonstrated. The user drives the motor by turning on the switch 12 while grasping the grip portion 11. When the rotating shaft 15 of the motor rotates, the bearing 21 assembled to the eccentric shaft portion 20 rotates eccentrically about the shaft member 17. At the time of eccentric rotation, the link member 30 is reciprocatingly rotated and electrically driven as indicated by arrows in FIG. 3 by repeating the movement in which the bearing 21 abuts only on the engaging portions 32 and 32 of the link member 30 in the left-right direction. The tool 1 reciprocates left and right when viewed from the front. Along with this, the spindle 22 and the cutting tool 28 reciprocate left and right around the axis 25. The pillar material is cut by pressing the cutting tool 28 that reciprocates while keeping the spindle 22 in a state orthogonal to the floor surface against the pillar material. When cutting the column member, the axis 26 of the main body housing 10 is inclined upward from the direction orthogonal to the axis 25 of the spindle 22. For this reason, the main body housing 10 will be in the state inclined to the upper side rather than the state parallel to a floor surface. Therefore, the space between the floor surface and the main body housing 10 becomes wider than when the main body housing 10 is kept parallel to the floor surface. Therefore, even if a member that rises slightly from the floor surface is provided in the vicinity of the column member, the main body housing 10 can be prevented from hitting this member.

  In addition to this, when the pillar material is cut, the battery mounting portion 13 to which the battery pack 14 is mounted protrudes from the main body housing 10 to the floor surface side, so that the battery pack 14 also protrudes from the main body housing 10 to the floor surface side. The battery pack 14 is mounted on a battery mounting portion 13 provided at the rear end portion of the main body housing 10 inclined upward. Therefore, the battery mounting part 13 and the battery pack 14 are prevented from coming into contact with the floor surface, and the battery mounting part 13 and the battery pack 14 are prevented from coming into contact with a member slightly rising from the floor surface in the vicinity of the pillar material. it can.

<Effect of this embodiment>
In the reciprocating rotary electric power tool 1 of the present embodiment, when the pillar material erected on the floor surface is cut with the cutting tool 28 fixed to the spindle 22, the main body housing 10 is positioned more than the position parallel to the floor surface. It is possible to keep the state inclined upward. Therefore, the space between the floor surface and the main body housing 10 becomes wider than when the main body housing 10 is kept parallel to the floor surface. Therefore, it can prevent that the main body housing 10 hits the member which stands | starts up slightly from a floor surface in the vicinity of a pillar material. As a result, workability at the time of cutting the column material is improved.

  Further, when the column material is cut, the battery pack 14 is mounted on the battery mounting portion 13 provided at the rear end portion of the main body housing 10 inclined upward, so that the battery pack 14 is in the vicinity of the floor surface or the column material. With this, it is possible to prevent contact with a member that rises slightly from the floor. Therefore, the battery pack 14 does not interfere with the cutting of the pillar material.

  The present invention is not limited to the above-described embodiment, and can be implemented by appropriately changing a part of the configuration without departing from the spirit of the invention. For example, unlike the embodiment described above, the axis 25 of the spindle 22 may be inclined toward the front side of the main body housing 10 by an appropriate angle of less than 5 degrees or more than 6 degrees from the direction orthogonal to the axis 26 of the main body housing 10. Good. In the above-described embodiment, an example in which the column material is cut with a reciprocating rotary electric tool has been described. Instead, for example, a reciprocating rotary electric tool in which a rubber pad to which sandpaper is attached is fixed to a spindle is used. You may make it perform planar grinding | polishing with respect to the hollow part of a surface. Also in this case, the main body housing is inclined upward from a state parallel to the floor surface, so that the main body housing can be prevented from hitting the floor surface. Furthermore, although the example which applies this invention to a rechargeable reciprocating rotary electric tool was shown in embodiment mentioned above, you may apply this invention to an AC drive type reciprocating rotary electric tool. .

  1 .... reciprocating rotary electric tool, 10 .... main body housing, 11 .... grip part, 13 .... battery mounting part, 14 .... battery pack, 22 ... spindle, 25 ... spindle axis, 26 ... main body The axis of the front-rear direction of the housing, 28... Cutting tool, θ... The angle at which the axis of the spindle is inclined forward from the direction orthogonal to the axis of the main body housing.

Claims (2)

A reciprocating rotary electric tool in which an output shaft that reciprocally rotates left and right by driving the motor is protruded downward at a front end portion of a housing that extends in the front-rear direction and accommodates a motor, and a tip tool is connected to the tip of the output shaft Because
A reciprocating rotary power tool characterized in that an axis of the output shaft is inclined forward by a predetermined angle from a direction orthogonal to the longitudinal axis of the housing.   The reciprocating rotary electric tool according to claim 1, wherein a battery for supplying power to the motor is detachable at a rear end portion of the housing.

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