Polishers

Patent metadata

Field	Value
Publication number	US-10286516-B2
Application number	US-201615287530-A
Country	US
Kind code	B2
Filing date	Oct 6, 2016
Priority date	Oct 15, 2015
Publication date	May 14, 2019
Grant date	May 14, 2019

Abstract

A polisher may include a polishing pad, a motor, a transmission device, and a mode selection device. The transmission device can transmit a rotational drive force of the motor to the polishing pad in a plurality of different modes with respect to a motion of the polishing pad. The mode selection device may be used for selecting a desired motion mode of the output member. Additionally, a motor and handle housing with an accompanying power cord may be constructed to aid in ease of manipulation of the polisher by the user with minimal interference.

First claim

What is claimed is:

1. A polisher comprising:
a polishing pad having a polishing surface;
a motor configured to generate a rotational drive force;
an output member coupled to the polishing pad, so that the polishing pad moves with the output member;
a transmission device configured to transmit the rotational drive force of the motor to the output member in a first mode and a second mode;
a mode selection device (1) coupled to the transmission device, (2) configured to allow selection of one of the first mode and the second mode, so that the output member moves according to the selected mode, and (3) includes an engaging member movable between an engaging position and a disengaging position;
an internal gear member; and
a transmission housing configured to support the transmission device; wherein:
the mode selection device is disposed at the transmission housing;
the first mode causes the output member to resolve about a first axis and to freely rotate about a second axis displaced from the first axis;
the second mode causes the output member to revolve about the first axis while forcibly rotating the output member about the second axis;
the transmission device comprises:
a support shaft portion configured to be rotatably driven about the first axis by the motor; and
an eccentric shaft portion (1) that rotates with the support shaft portion about the first axis when the support shift portion is rotating and (2) defining the second axis,
the output member (1) has an external gear portion and (2) is attached to the eccentric shaft portion so as to be rotatable relative to the eccentric shaft portion about the second axis;
the internal gear member (1) is rotatable about the first axis relative to the transmission housing, (2) includes an internal gear portion that is in engagement with the external gear portion of the output member and (3) includes an engaging portion for engagement with the engaging member of the mode selection device;
the first mode causes the engaging member to be disengaged from the engaging portion of the internal gear member to permit rotation of the internal gear member relative to the transmission housing, so that the output member is free to rotate about the second axis while the output member revolves around the first axis;
the second mode causes the engaging member to engage the engaging portion of the internal gear member to prevent rotation of the internal gear member relative to the transmission housing, so that the output member is forced to rotate about the second axis while the output member revolves about the first axis;
the engaging portion of the internal gear member comprises a plurality of engaging grooves formed in a radially outer periphery of the internal gear member;
the engaging member of the mode selection device comprises an engaging pin movable between the engaging position and the disengaging position in a radial direction with respect to a rotational axis of the internal gear member.

2. The polisher according to claim 1 , wherein:
the polishing pad is detachably attached to the output member.

3. The polisher according to claim 1 , wherein:
the polishing pad is integrated with the output member.

4. A polisher comprising:
a polishing pad having a polishing surface;
a motor configured to generate a rotational drive force;
an output member coupled to the polishing pad, so that the polishing pad moves with the output member;
a transmission device configured to transmit the rotational drive force of the motor to the output member in a first mode and a second mode;
a mode selection device (1) coupled to the transmission device, (2) configured to allow selection of one of the first mode and the second mode, so that the output member moves according to the selected mode, and (3) includes an engaging member movable between an engaging position and a disengaging position;
an internal gear member; and
a transmission housing configured to support the transmission device; wherein:
the mode selection device is disposed at the transmission housing;
the first mode causes the output member to revolve about a first axis and to freely rotate about a second axis displaced from the first axis;
the second mode causes the output member to revolve about the first axis while forcibly rotating the output member about the second axis;
the transmission device comprises:
a support shaft portion configured to be rotatably driven about the first axis by the motor; and
an eccentric shaft portion (1) that rotates with the support shaft portion about the first axis when the support shift portion is rotating and (2) defining the second axis;
the output member (1) has an external gear portion and (2) is attached to the eccentric shaft portion so as to be rotatable relative to the eccentric shaft portion about the second axis;
the internal gear member (1) is rotatable about the first axis relative to the transmission housing, (2) includes an internal gear portion that is in engagement with the external gear portion of the output member and (3) includes an engaging portion for engagement with the engaging member of the mode selection device;
the first mode causes the engaging member to be disengaged from the engaging portion of the internal gear member to permit rotation of the internal gear member relative to the transmission housing, so that the output member is free to rotate about the second axis while the output member revolves about the first axis;
the second mode causes the engaging member to engage the engaging portion of the internal gear member to prevent rotation of the internal gear member relative to the transmission housing, so that the output member is forced to rotate about the second axis while the output member revolves about the first axis;
the internal gear member further includes an engagement prohibiting portion configured to prohibit engagement of the engaging member with the engaging portion when the engaging member moves from the disengaging position to the engaging portion if the internal gear member rotates at a speed higher than a predetermined speed.

5. The polisher according to claim 4 , wherein:
the engagement prohibiting portion is disposed proximally adjacent to the engaging portion in a rotational direction of the internal gear member; and
the engagement prohibiting portion includes an inclined surface at a point on the internal gear member, the inclined surface being inclined in a direction opposite to the rotational direction of the internal gear member.

6. The polisher according to claim 5 , wherein:
the engaging portion of the internal gear member comprises a plurality of engaging grooves formed on a radially outer periphery of the internal gear member; and
the engaging member of the mode selection device comprises an engaging pin movable between the engaging position and the disengaging position in a radial direction with respect to a rotational axis of the internal gear member.

7. The polisher according to claim 5 , wherein:
the engaging portion of the internal gear member comprises a plurality of engaging grooves formed on one of two opposing surfaces in an axial direction of the internal gear member; and
the engaging member comprises an engaging pin movable between the engaging position and the disengaging position in an axial direction parallel to a rotational axis of the internal gear member.

8. The polisher according to claim 5 , wherein the output member comprises an upper tubular portion and a lower tubular portion integrally formed in series.

9. The polisher according to claim 1 , further comprising:
a motor housing accommodating the motor and having a longitudinal axis that extends in a front-to-rear direction substantia

Assignees

• Makita Corp

Inventors

• Ishikawa Junya
• Ninagawa Satoshi

Classifications

• B24B23/03

  the tool being driven in a combined movement · CPC title

• B24B37/20

  Lapping pads for working plane surfaces · CPC title

• B24B23/02 Primary

  with rotating grinding tools; Accessories therefor · CPC title