JPH042003Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] This invention can be used to chamfer the corners of wood,
This invention relates to a battery trimmer that is used when cutting out wood.

[Prior Art] In the case of a conventional electric trimmer, wood is cut by rotationally driving a bit using an AC motor connected to an AC power source via a connection cord.

[Problems to be solved by the invention] Therefore, in the case of conventional electric trimmers, the connection cord makes them inconvenient to handle and limits the range of movement. In some cases, the weight of the battery impairs the weight balance of the tool body, and the weight of the battery concentrates in a position away from the rotation axis of the cutting tool, reducing the operability of the tool body.

The present invention aims to solve the above problems.

[Means for Solving the Problems] The electric trimmer of the present invention has a battery case formed in an oblong shape at the upper end of the housing of the trimmer main body, and a body case formed so as to be grippable connected orthogonally below the battery case. Inside the lever body case is a DC motor,
A transmission mechanism for transmitting the rotation of the DC motor to the bit is housed with the motor shaft of the DC motor offset from the rotation axis of the bit, and the motor shaft is aligned with respect to the rotation axis of the bit at the upper part of the body case. A switch for starting and stopping the DC motor is disposed at a position away from the direction opposite to the direction of deflection, and a battery whose longitudinal center portion is located directly above the bit is placed in the battery case. It is stored in an inverted state, and has a structure in which a base that slides on the surface to be cut is attached to the body case.

(Function) By storing the battery horizontally in the battery case at the upper end of the housing and placing the longitudinal center of the battery directly above the bit, the center of gravity of the battery and the axis of rotation of the bit can be aligned. By adding the weight of the battery to the bit so that the weight of the battery is almost the same as that of the bit, and making the center of gravity of the entire trimmer body almost coincide with the axis of rotation of the bit, the switch is inserted into the upper part of the body case connected below the battery case. The outer shape of the lower part of the trunk case is reduced to make the trunk case easier to grip.

[Example] Next, an example of the present invention will be described with reference to the drawings.

The housing 1 of the trimmer main body T is formed by assembling a pair of left and right shells that can be divided into halves, and at the upper end of the housing 1 is a battery case 1a in which a battery 2 for the motor power source is housed horizontally. A battery chamber 5 is formed within the battery case 1a. Battery case 1a
Below the body case 1b, which is formed in a substantially cylindrical shape and can be gripped, is arranged in a row in a perpendicular manner. The battery case 1a and the body case 1b are arranged in the direction of the rotation axis of the bit 7, and the longitudinal center portion of the battery 2 inside the battery case 1a is arranged almost directly above the rotation axis of the bit 7.

A motor chamber 3 communicating with a battery chamber 5 is formed in the upper part of the body case 1b, and a DC motor 4 has a motor shaft 4a connected to a bit 7 in the motor chamber 3.
Inside the housing 1, a battery 2 lying on its side and a motor 4 facing downward are disposed orthogonally to each other and are arranged in an extension line of the rotation axis of the bit 7. arranged along.

A transmission chamber 6 communicating with the motor chamber 3 is formed in the lower part of the body case 1b, and a transmission mechanism D for transmitting the rotation of the motor 4 to the bit 7 is housed in the transmission chamber 6. D indicates a pinion 8 fitted to the motor shaft 4a of the motor 4, a spindle 9 rotatably suspended from below the motor 4, a spur gear 10 fitted to the upper end of the spindle 9 and meshed with the pinion 8, etc. A collector chuck 11 for inserting the bit 7 is attached to the lower end of the spindle 9.

On one side of the body case 1b, there is a trimmer body T that slides on the surface to be cut of the workpiece during cutting of the workpiece.
A base 12 having a substantially L-shaped longitudinal section is attached to guide the cutting tool in a direction parallel to the surface to be cut, and a bit hole 13 for inserting the bit 7 is provided at the lower end of the base 12. A guide piece 12a is formed in a horizontal manner and extends through the guide piece 12a so as to be in sliding contact with the surface to be cut. A vertically elongated bolt hole 15 is provided through the base 12, and the base 12 is fastened to the trunk case 1b by a bolt 14 so as to be adjustable in vertical movement.

Inside the motor chamber 3 of the trunk case 1b is the trunk case 1b.
A switch 16 for starting and stopping the DC motor 4 is disposed at a position away from the direction of deviation of the motor shaft 4a of the DC motor 4 with respect to the rotating shaft of the bit 7 in the upper part of the body case 1b. A switch lever 17 is swingably supported on the switch lever 17, and a push piece 17a is formed at the upper end of the switch lever 17 to face the push button 16a of the switch 16, while a body case 1b is formed at the bottom of the switch lever 17.
An operating piece 17b is formed which is inserted into a slit 19 formed in the slit 19 and urged outward by a spring 18, and when the operating piece 17b is pressed, the push button 16a of the switch 16 is pressed by the operating piece 17b. The DC motor 4 is rotationally driven.

Next, the operation and effects of the embodiment having the above configuration will be explained.

In this example, a grippable body case 1b is arranged perpendicularly below a battery case 1a formed in an oblong shape at the upper end of the housing 1 of the trimmer main body T. DC motor 4
and a transmission mechanism D that transmits the rotation of the DC motor 4 to the bit 7.
is stored offset from the rotation axis of the bit 7, and a DC motor 4 is started at a position in the upper part of the body case 1b in a direction opposite to the direction of deviation of the motor shaft 4a with respect to the rotation axis of the bit 7. Switch to stop 1
A battery 2 is placed in the battery case 1a, and the battery 2 whose longitudinal center portion is located directly above the bit 7 is stored in a sideways state. The base 12 is attached.

For this reason, the center of gravity of the battery 2 lying on its side almost coincides with the axis of rotation of the bit 7, and the weight of the battery 2 is concentratedly applied to the bit 7, improving the overall weight balance, which makes cutting work easier. The middle trimmer main body T can be held in the proper posture and moved smoothly, and the trimmer main body T
Appropriate pressing force can be applied downward and in the direction of movement of the trimmer body T, eliminating problems such as tilting the posture of the trimmer body T and vibrations during cutting operations, and making it easier to move the trimmer body T. Operability can be improved.

In addition, since the switch 16 is inserted in the upper part of the body case 1b in the direction opposite to the rotation axis of the bit 7 and the motor shaft 4a, the outer shape of the lower part of the body case 1b can be reduced to reduce the outer shape of the body case 1b. The lower part can be made easier to grip, making it easier to route electrical wiring, and the trimmer body T can be stably gripped at a position close to bit 7 to operate the switch, and the trimmer body T can be moved against cutting resistance. It has the effect of allowing smooth and stable movement and precision cutting.

(Effects of the invention) By having the above-mentioned configuration of the invention, the center of gravity of the battery in a sideways state almost coincides with the axis of rotation of the bit, and the weight of the battery is concentratedly applied to the bit. Since the weight balance is improved, the trimmer body can be held in the proper posture during cutting work and moved smoothly, and the appropriate pressing force can be applied to the trimmer body downward and in the direction of movement. It is possible to improve operability when moving the trimmer body by eliminating problems such as tilting of the trimmer body or vibration during cutting work.

In addition, since the switch is inserted in the upper part of the body case in the direction opposite to the rotation axis of the bit and the motor shaft, the outer shape of the lower part of the body case can be reduced to make it easier to grip the lower part of the body case. In addition to making it easier to route electrical wiring, the trimmer body can be stably gripped close to the bit and the trimmer body can be moved smoothly and stably against cutting resistance, making it possible to perform precision operations. This has the effect of making cutting work possible.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional view, and FIG. 2 is a sectional view taken along the line A--A in FIG. 1. 1...Housing, 1a...Battery case,
1b...Body case, 2...Battery, 3...Motor chamber, 4...Motor, 6...Transmission chamber, 7...Bit, D...Transmission mechanism, T...Trimmer body.

Claims (1)

[Scope of utility model registration request] Below the battery case formed in an oblong shape at the upper end of the housing of the trimmer main body, a body case formed so as to be grippable is connected in a perpendicular manner. A transmission mechanism for transmitting the rotation of the DC motor to the bit is housed with the motor shaft of the DC motor being offset from the rotation axis of the bit, and the direction of deviation of the motor shaft with respect to the rotation axis of the bit is set in the upper part of the body case. A switch for starting and stopping the DC motor is disposed at a position away from the motor in the opposite direction, and a battery is placed in the battery case with its longitudinal center portion directly above the bit. 1. A battery trimmer, wherein the battery trimmer is housed in a battery trimmer, and a base that slides on a surface to be cut is attached to the body case.