JP2012213813A - Grinder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grinder having superior stability and driven by a battery.SOLUTION: The grinder has a disc motor 3 embedded into a motor housing 22, a tool attachment part 34 which is rotationally driven by the disc motor 3 and to which a tip tool 1A for grinding a material to be ground can be attached, and a battery attachment part 44 to which the battery 5 for supplying power to the disc motor 3 is attached. The disc motor 3 is arranged so that the axial direction of an axial core of the disc motor 3 may be oriented in a direction which is the same as the axial direction of an axial core of the tool attachment part 34, and a loop-shaped handle 4 is arranged in the motor housing 22.

Description

  The present invention relates to a polishing machine, and more particularly to a battery-powered polishing machine.

  Polishing machines that polish windows and wall surfaces with a puff, which is a polishing tool, are known. As shown in Patent Document 1, this polishing machine has a mounting portion that is driven by a motor and on which a puff is mounted, and is driven by being connected to an external power source by a cord.

JP-A-61-199385

  In the polishing machine disclosed in Patent Document 1, the surface to be polished may be damaged when the cord connected to the external power source contacts the surface to be polished. In order to avoid this, a polishing machine with a battery such as a rechargeable battery has been proposed. However, since the battery is heavy, the center of gravity of the polishing machine is mounted in combination with the motor that is originally heavy. May move away from the department. In this case, the stability of the polishing machine with respect to the surface to be ground was lowered, and workability was impaired. Accordingly, an object of the present invention is to provide a polishing machine having excellent stability.

  In order to solve the above-mentioned problems, the present invention is equipped with a disk motor, a tool mounting portion that is rotationally driven by the disk motor and is capable of mounting a polishing tool for polishing a material to be polished, and a battery that supplies power to the disk motor. A battery mounting portion, and the disk motor includes a polishing machine arranged such that the axial direction of the axis of the disk motor is the same as the axial direction of the axis of the tool mounting portion. provide.

  According to such a configuration, since the disk motor having a short axial length is used as a power source, the axial distance of the polishing machine can be shortened. As a result, the position of the center of gravity of the polishing machine can be brought close to the tool mounting portion, and the stability during the operation of the polishing machine can be improved.

  In the polishing machine configured as described above, the disk motor and the tool mounting portion are arranged coaxially, and the battery mounting portion is configured such that the battery is positioned within an axial projection of the tool mounting portion. Preferably it is.

  According to such a configuration, since the heavy battery can be disposed at the axial center position or in the vicinity of the axial center position, the position of the center of gravity can be brought close to the axial center position on a plane orthogonal to the axial center. Therefore, the balance of the polishing machine is improved and the stability can be increased.

  The housing further includes a housing for holding the disk motor. The housing is provided with a handle, the handle is located on the opposite side of the tool holding portion with respect to the disk motor, and one end and the other end of the handle are disposed on the housing. It preferably has a loop shape connected to the housing.

  According to such a configuration, it is easy to hold the handle and to hold the polishing machine. Further, since the handle is located in the vicinity of the shaft center, it is easy to balance the weight, and the polishing machine can be stably held.

  Further, it is preferable that the handle and the tool mounting portion are configured such that at least a part of the handle and the battery are disposed in an opposite position with respect to the axis on a plane orthogonal to the axis. .

  According to such a configuration, the weight balance is improved and the polishing machine can be stably held.

  In order to solve the above problems, a polishing machine is provided that includes a disk motor, a housing that houses the disk motor, and a battery that is detachably fixed to the housing.

  According to the polishing machine of the present invention, the weight balance is improved and the stability can be improved.

The side view of the polisher concerning an embodiment of the invention. The side sectional view of the polisher concerning an embodiment of the invention.

  Hereinafter, a polishing machine according to an embodiment of the present invention will be described with reference to FIGS. A polishing machine 1 shown in FIG. 1 is a tool used to polish a flooring or a window to be polished with a polishing member (puff) 1A which is a tip tool, and is driven to rotate at about 500 to 1000 revolutions per minute. The The polishing machine 1 is mainly composed of a housing 2, a disk motor 3 (FIG. 2), and a handle 4, and a battery 5 is mounted.

  As shown in FIG. 2, the housing 2 mainly includes a frame 21 and a motor housing 22. The frame 21 is made of aluminum, and a hole 21a through which an output shaft portion 31 (described later) passes is formed in the center. A bearing 21A that rotatably supports the output shaft portion 31 is provided around the hole 21a. The motor housing 22 is divided into two in a direction perpendicular to the up and down direction, which will be described later. The motor housing 22 is overlapped with the frame 21 to form a space in which the disk motor 3 can be placed, and the output shaft 31 can be rotated. A bearing 22 </ b> A is provided to be supported on the bearing. The vertical direction of the polishing machine 1 is defined with the direction from the motor housing 22 toward the frame 21 as the lower side direction. The frame 21 and the motor housing 22 are connected by screws. A cover 23 that protects a fan 35 to be described later is mounted below the frame 21.

  The disk motor 3 includes an output shaft portion 31, a substantially disk-shaped rotor 32 fixed to the output shaft portion 31, a plurality of magnets 33, and a brush (not shown) supported by the motor housing 22. Yes.

  The output shaft portion 31 is arranged so that the axial direction thereof coincides with the vertical direction, and the lower end of the output shaft portion 31 is configured to protrude from the cover 23. The output shaft portion 31 is rotatably supported with respect to the housing 2 by the bearing 21A and the bearing 22A. ing. An axis that includes the central axis of the output shaft portion 31 and extends vertically is defined as a virtual axis L. A tool mounting portion 34 is provided at the lower end position of the output shaft portion 31.

  The tool mounting portion 34 is made of metal and is mounted with a base portion 34A that is fixed to the output shaft portion 31 so as to rotate coaxially and integrally with a bolt, and a polishing member 1A that is made of rubber and is mounted on the base portion 34A and is a polishing tool. The mounting portion 34B is formed into a disc shape. In addition, a fan 35 that rotates coaxially and integrally is mounted at a position in the cover 23 of the output shaft portion 31.

  The rotor 32 can be in contact with a brush (not shown) and has a substantially disc-shaped commutator plate 32A on which a plurality of commutators are formed; a coil plate 32B on which a plurality of coils (not shown) are printed; The spacer 32C is provided between the daughter plate 32A and the coil plate 32B.

  The plurality of magnets 33 are attached to the motor housing 22 and the frame 21 positioned above and below the rotor 32 so as to sandwich the rotor 32, and are arranged around the output shaft portion 31 in a circumferential manner and between the adjacent magnets 33. They are arranged with different polarities.

  The handle 4 is made of resin and is positioned on the upper side opposite to the tool mounting portion 34 with respect to the disk motor 3. One end and the other end are respectively screwed and connected to the motor housing 22, and are directed upward. A loop shape that extends and intersects the virtual axis L is formed. The handle 4 is provided with a trigger 41, a trigger switch 42, a terminal portion 43, and a battery mounting portion 44. The trigger 41 is arranged on a side surface facing the inside of the loop in the handle 4 and is a place operated by an operator.

  The trigger switch 42 is disposed along the trigger 41 and is connected to the disk motor 3 by a cord, and is configured to be turned on when the trigger 41 is operated. A location where the trigger 41 and the trigger switch 42 are arranged in the handle 4 is defined as a main handle 45.

  The terminal portion 43 is arranged on the top surface, which is the top portion of the handle 4, in the vicinity of the battery mounting portion 44 and connected to the trigger switch 42 by a cord so that the battery 5 mounted on the battery mounting portion 44 is energized. Has been.

  The battery mounting portion 44 is disposed on the upper surface of the handle 4 and at a position opposite to the main handle 45 with respect to the virtual axis L in a plane orthogonal to the virtual axis L, and an accommodation space 44a in which the battery 5 is accommodated is defined. Has been. Further, the battery mounting portion 44 includes an engaging portion 44A (FIG. 1) with which a later-described latch 52 of the battery 5 is engaged.

  The battery 5 is a known rechargeable battery, and is inserted into the accommodation space 44a, and includes an insertion portion 51 in which a cell (not shown) is built, a latch 52 engageable with the engagement portion 44A, a terminal portion 43, And a conduction portion 53 that is in contact and energized. Further, in the battery 5, a grip portion 54 that can be gripped by an operator is provided at the uppermost portion in a state where the battery 5 is mounted on the battery mount portion 44. In the battery 5, since a cell (not shown) is built in the insertion portion 51, the center of gravity is the PG position shown in FIG. Therefore, the position of the center of gravity of the battery 5 is disposed at a position opposite to the main handle 45 with respect to the virtual axis L in a plane orthogonal to the virtual axis L.

  When polishing with the polishing machine 1, the main handle 45 is held with one hand, the holding part 54 is held with the other hand, the polishing machine 1 is held, and the trigger 41 is operated. Electric power is supplied to the disk motor 3 to rotate the polishing member 1A. At this time, it is necessary to hold the main handle 45 with one hand for the operation of the trigger 41, but the other hand does not necessarily have to hold the grip portion 54, and grips a portion that is easy to grip on the handle 4. do it. In addition, since the grip portion 54 is located on the virtual axis L and in the vicinity of the virtual axis L, the polishing member 1A is decentered by gripping the grip portion 54 and biasing the polishing machine 1 downward. A stable polishing operation can be performed without being biased by the surface to be polished.

  Since the disk motor 3 is composed of the rotor 32 on the disk, the axial dimension can be shortened compared to a normal motor using a cylindrical rotor. Therefore, the center of gravity position G of the polishing machine 1 can be positioned downward to lower the center of gravity, and the polishing machine 1 can be kept from rotating when the polishing member 1A rotates, and the rotation can be stabilized.

  Since the handle 4 gripped by the operator is formed in a loop shape above the housing 2, the handle 4 can be gripped from various directions and is easily gripped. Further, since the handle 4 is located on the virtual axis L that is the rotation center of the polishing member 1A, holding the handle 4 makes it easy to balance the weight and can hold the polishing machine 1 stably. Further, with respect to the virtual axis L, the center of gravity PG of the battery 5 is located on the left side on the paper surface in FIG. 2 and in the vicinity of the virtual axis L, and the main handle 45 is located on the right side on the paper surface in FIG. positioned. Although the battery 5 is heavier than the main handle 45, the weight balance around the virtual axis L between the main handle 45 and the battery 5 can be maintained because the distance from the virtual axis L is shorter than the main handle 45. . Therefore, the gravity center position G of the polishing machine 1 can be set on the virtual axis L or in the vicinity of the virtual axis L, and the polishing machine 1 can be held stably.

  The polishing machine according to the embodiment of the present invention is not limited to the above-described embodiment, and various improvements and modifications can be made within the scope described in the claims. For example, in the embodiment, the tool mounting portion is directly driven by the disk motor. However, the present invention is not limited to this, and the tool mounting portion may be driven via a speed reduction mechanism. Further, although only the loop handle is used as the handle, the present invention is not limited to this, and a side handle extending in a direction intersecting with the vertical direction may be provided. The side handle increases the retention when the polishing machine becomes large, and is effective. Moreover, in order to grind a high place, you may provide the mounting part which mounts a rod-shaped extension handle in a housing.

1: Polishing machine 1A: Puff 2: Housing 3: Disc motor 4: Handle 5: Battery 21: Frame 21A: Bearing 21a: Hole 22: Motor housing 22A: Bearing 23: Cover 31: Output shaft portion 32: Rotor 32A: Rectification Sub-plate 32B: Coil plate 32C: Spacer 33: Magnet 34: Tool mounting portion 34A: Base portion 34B: Mounting portion 35: Fan 41: Trigger 42: Trigger switch 43: Terminal portion 44: Battery mounting portion 44A: Engaging portion 44a: Storage space 45: Main handle 51: Insertion part 52: Latch 53: Conduction part 54: Holding part

Claims (5)

A disk motor,
A tool mounting portion that is rotationally driven by the disk motor and on which a polishing tool for polishing a material to be polished can be mounted;
A battery mounting portion to which a battery for supplying power to the disk motor is mounted;
The polishing machine, wherein the disk motor is disposed so that an axial direction of an axis of the disk motor is the same as an axial direction of an axis of the tool mounting portion. The disk motor and the tool mounting portion are arranged on the same axis,
The polishing machine according to claim 1, wherein the battery mounting portion is configured such that the battery is positioned within an axial projection of the tool mounting portion. A housing for holding the disk motor;
The housing is provided with a handle,
2. The handle according to claim 1, wherein the handle is located on an opposite side of the tool mounting portion with respect to the disk motor, and has a loop shape in which one end and the other end of the handle are connected to the housing. The polishing machine according to claim 2.   The handle and the tool mounting portion are configured such that at least a part of the handle and the battery are disposed at opposite positions with respect to the axis on a plane orthogonal to the axis. The polishing machine according to claim 3. A disk motor,
A housing for housing the disk motor;
A polishing machine comprising: a battery detachably fixed to the housing.

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