# US 10,245,711 B2 · Electric power tool with vibration mechanism > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,245,711 B2 - Document ID: US10245711B2 - Status: Granted - Kind: B2 - Application number: 15/347,090 - Filed: 2016-11-09 - Published: 2017-06-08 - Granted: 2019-04-02 - Earliest claimed: 2015-12-03 - Assignees: Makita Corporation - Applicants: Makita Corporation - Inventors: Hidenori Nagasaka - Web page: https://patentgrep.com/patent/US10245711B2 ## CPC - B25B 21/023: {for imparting an axial impact, e.g. for self-tapping screws} - B23B 45/00: Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor (details or components, e.g. casings, bodies, of portable power-driven tools not particularly related to the operation performed B25F5/00) - B25D 16/006: {Mode changers; Mechanisms connected thereto} - B25F 5/00: Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for - B25F 5/001: {Gearings, speed selectors, clutches or the like specially adapted for rotary tools} - B25D 2211/064: Axial cams, e.g. two camming surfaces coaxial with drill spindle - B25D 2216/0023: Tools having a percussion-and-rotation mode - B25D 2216/0038: Tools having a rotation-only mode - B25B: TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING - B23B: TURNING; BORING (arrangements for copying or controlling B23Q) - B25D: PERCUSSIVE TOOLS {(percussive machines for forging B21J; hand-held drilling machines, in general B23B45/00, for wood B27C3/08; drilling machines, used for mining or quarrying, with reciprocating tool which is turned intermittently when out of contact with the working face E21B1/00)} - B25F: COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR {(machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass B23P23/00 and subgroups)} ## Abstract An electric power tool includes a housing, a motor, a deceleration mechanism, a final output shaft, a vibration mechanism, a vibration switching member, a stop member, and an expansion prevention portion. The vibration mechanism provides a vibration in an axial direction to the final output shaft. The vibration switching member is accommodated in a slit axially disposed on a front end of a tubular portion and moved back and forth in the slit by an operation from outside to switch on and off actuation of the vibration mechanism. The stop member is installed on the front end of the tubular portion to cover the slit. The expansion prevention portion is disposed on the stop member and is brought in contact with an outer periphery of the front end of the tubular portion to prevent the front end of the tubular portion from expanding, ## Claims ### Claim 1 An electric power tool with vibration mechanism comprising: a housing; a motor housed in the housing; a deceleration mechanism to which a rotation of the motor is transmitted, the deceleration mechanism being housed in a gear case; a final output shaft to which the rotation is transmitted from the deceleration mechanism, the final output shaft being held in a tubular portion via a bearing, the tubular portion being disposed on a front end of the gear case, and the final output shaft projecting forward; a vibration mechanism disposed in the tubular portion, the vibration mechanism being configured to provide a vibration in an axial direction to the final output shaft; a vibration switching member housed in a slit, the slit being axially disposed on a front end of the tubular portion, the vibration switching member being moved back and forth in the slit by an operation from outside to switch on and off actuation of the vibration mechanism; a stop member installed on the front end of the tubular portion to cover the slit; and an expansion prevention portion disposed on the stop member, the expansion prevention portion being brought in contact with an outer periphery of the front end of the tubular portion to prevent the front end of the tubular portion from expanding, and the front end of the tubular portion including the slit. ### Claim 2 (depends on 1) The electric power tool with vibration mechanism according to claim 1, wherein the expansion prevention portion is a ring-shaped protrusion being fit to the front end of the tubular portion from outside. ### Claim 3 (depends on 2) The electric power tool with vibration mechanism according to claim 2, wherein: the tubular portion includes an outer periphery of the front end where a stepped portion is disposed, and the protrusion has an inner diameter shape being fit to the stepped portion. ### Claim 4 (depends on 1) The electric power tool with vibration mechanism according to claim 1, wherein the tubular portion externally includes a rotating operation member retained by the stop member formed in a disk-shape. ### Claim 5 (depends on 4) The electric power tool with vibration mechanism according to claim 4, wherein: the rotating operation member includes a flat spring for clicking that elastically engages with a plurality of engaging depressed portions disposed on the stop member in accordance with a rotating operation of the rotating operation member, and the flat spring is installed in a retained state by inserting a claw portion formed along a front surface of the rotating operation member between the stop member and the rotating operation member. ### Claim 6 (depends on 5) The electric power tool with vibration mechanism according to claim 5, wherein the engaging depressed portion is disposed on an outer periphery of the stop member. ### Claim 7 (depends on 6) The electric power tool with vibration mechanism according to claim 6, wherein: the flat spring is a leaf spring that is fit to a positioning depressed portion disposed on an inner periphery of the rotating operation member to be supported in a tangent line direction of the stop member, and a pair of the claw portions is disposed on both sides of the leaf spring in a longer side direction. ### Claim 8 (depends on 4) The electric power tool with vibration mechanism according to claim 4, wherein the rotating operation member is disposed for adjusting a torque of the final output shaft. ### Claim 9 (depends on 1) The electric power tool with vibration mechanism according to claim 1, wherein the stop member restricts a movement of the bearing to a front side in a state of being installed on the tubular portion. ### Claim 10 (depends on 9) The electric power tool with vibration mechanism according to claim 9, wherein: the stop member restricts the movement of the bearing to the front side via an intermediate ring inserted into the tubular portion ahead of the bearing, and the intermediate ring is engaged with the stop member in a state of being restricted to rotate in the tubular portion to also restrict a rotation of the stop member. ### Claim 11 (depends on 10) The electric power tool with vibration mechanism according to claim 10, wherein: the intermediate ring includes a regulating protrusion to be inserted into the slit and is restricted to rotate in the tubular portion, and the stop member is brought in contact with the regulating protrusion to press the intermediate ring to the bearing. ### Claim 12 (depends on 1) The electric power tool with vibration mechanism according to claim 1, wherein: the vibration mechanism includes a first cam that integrally rotates with the final output shaft disposed movable back and forth in the axial direction and a second cam rotatably externally mounted on the final output shaft at a rear of the first cam, and when the vibration switching member engages with the second cam to restrict the rotation of the second cam, the first cam retreated with the final output shaft engages with the second cam to provide the vibration to the final output shaft. ### Claim 13 (depends on 12) The electric power tool with vibration mechanism according to claim 12, wherein the vibration switching member is a vibration switching lever that engages with the second cam on an advance position to restrict the rotation of the second cam and releases the engagement with the second cam on a retracted position to allow the rotation of the second cam.