Abstract: A power tool having a hammer mechanism comprises a tool body, a motor, a handle, at least one biasing member, and at least one elastic member. The handle is connected to the tool body to be movable in at least a front-rear direction. The handle includes a cover part covering a portion of the tool body, and a grip part connected to the cover part. The at least one biasing member is disposed between the tool body and the handle and biases the tool body and the handle away from each other in the front-rear direction. The at least one elastic member is disposed between the tool body and the cover part of the handle such that the at least one elastic member is movable relative to the tool body and the handle and is shear-deformable in response to a relative movement of the tool body and the handle.

Abstract: A hammer drill includes a housing inside which a motor, a tubular tool holder, a driving mechanism, a rotation conversion member, and an inner housing are disposed. The driving mechanism is configured to perform at least one of rotation actuation of the tool holder and hammering actuation of a bit. The inner housing supports the driving mechanism, supports the tool holder via a first bearing, and supports an output shaft via a second bearing. The inner housing is divided into a front housing holding the first bearing and a rear housing that is formed in a separate body from the front housing and holds the second bearing. The inner housing is formed by connecting the front housing to the rear housing in an axis line direction of the tool holder. A seal member sealing outside space of the inner housing inside the housing is disposed in the front housing.

Abstract: A dust collection cup includes a cylindrical attachment to cause a bit to extend through the attachment, a cylindrical dust collector located in front of the attachment to cause the bit to extend through the dust collector, a seal between the attachment and the dust collector and having a through-hole to receive the bit, and a connection port connectable to a dust collection hose and located on an outer circumferential surface of the attachment outward in a radial direction of the bit from the seal and rearward from the seal. The connection port has a distance in the radial direction of the bit from an axis of the attachment to an outermost position longer than a distance in the radial direction of the bit from the axis to a position on the outer circumferential surface of the attachment that is opposite to the outermost position from the axis.

Abstract: A work tool includes a motor, a driving mechanism, a body housing and a handle. The driving mechanism is configured to perform an operation of linearly reciprocating the tool accessory along a driving axis extending in a front-rear direction. The handle includes a grip part extending substantially in an up-down direction, and a battery-mounting part provided on a lower side of the grip part. An upper end portion of the handle is connected to a rear end portion of the body housing via an elastic member so as to be movable relative to the body housing. A lower end portion of the handle is connected to the rear end portion of the body housing so as to be rotatable relative to the body housing, around a rotation axis extending in a left-right direction. The rotation axis is located on a lower side of the battery-mounting part.

Abstract: A hammer drill includes a housing inside which a motor, a tubular tool holder, a driving mechanism, a rotation conversion member, and an inner housing are disposed. The driving mechanism is configured to perform at least one of rotation actuation of the tool holder and hammering actuation of a bit. The inner housing supports the driving mechanism, supports the tool holder via a first bearing, and supports an output shaft via a second bearing. The inner housing is divided into a front housing holding the first bearing and a rear housing that is formed in a separate body from the front housing and holds the second bearing. The inner housing is formed by connecting the front housing to the rear housing in an axis line direction of the tool holder. A seal member sealing outside space of the inner housing inside the housing is disposed in the front housing.

Abstract: An impact tool includes a housing; and a motor, a tubular tool holder, a driving mechanism, a rotation shaft, a driving mechanism housing region inside the housing. The tool holder has a distal end on which a bit is mountable. The driving mechanism is configured to hammer the bit. The rotation shaft is disposed in the driving mechanism and rotates by a rotation of an output shaft of the motor. The driving mechanism housing region houses the driving mechanism in a sealed state inside the housing. The air escape path that releases air inside the driving mechanism housing region to outside of the driving mechanism housing region is formed inside the rotation shaft while an inlet of the air escape path is formed on an outer peripheral surface of the rotation shaft.

Abstract: A power tool including a vibration isolator can be downsized in a relative movement direction and reduce damage to wiring. A hammer drill includes a front housing including an output unit and a motor, a rear housing separate from the front housing and including a switch to be movable relative to the front housing in a front-rear direction, a vibration isolator located between the front housing and the rear housing and including a coil spring, a lead wire electrically connecting the motor and the switch, and a lead wire holder holding a middle portion of the lead wire in a lateral direction.

Abstract: A power tool having a hammer mechanism has a tool body that houses a motor and a driving mechanism and extends in a front-rear direction; a handle including a grip part that extends in an up-down direction orthogonal to the front-rear direction behind the tool body and has a lower end formed as a free end and is arranged below the driving axis; and a plurality of biasing members configured to elastically connect the tool body and the handle. The biasing members include at least one first biasing member arranged above the driving axis in the up-down direction, and at least one second biasing member arranged below the driving axis in the up-down direction. In this power tool, a biasing force of the at least one second biasing member is larger than a biasing force of the at least one first biasing member.

Abstract: A power tool has a motor, a rotary shaft and a housing. The rotary shaft has a first end portion on a first direction side and a second end portion on a second direction side in an axial direction of the rotary shaft. The housing is configured to store a lubricant on the first direction side of the first end portion of the rotary shaft. The rotary shaft has a first hole and a second hole. The first hole extends in the axial direction and that has a first opening in the first end portion of the rotary shaft. The second hole extends in a direction crossing an axis of the rotary shaft, that communicates with the first hole. The second hole has a second opening in an outer peripheral surface of the rotary shaft. A spiral part is provided within the first hole.

Abstract: A power tool includes a tool body, a motor, a handle, at least one biasing member, and at least one guide part. The handle is connected to the tool body to be pivotable and to be movable in at least a front-rear direction relative to the tool body. The handle includes a cover part covering a portion of the tool body and a grip part extending in a cantilever manner from the cover part. The at least one biasing member biases the tool body and the handle away from each other in the front-rear direction. The at least one guide part includes a first portion disposed on a portion of the tool body covered by the cover part, and a second portion disposed on the cover part of the handle and connected to the first portion to be movable in at least the front-rear direction relative to the first portion.

Abstract: A power tool includes a motor having a rotatable motor shaft, a first intermediate shaft, and a second intermediate shaft extending in parallel to the first intermediate shaft. An output shaft removably holds a tool accessory and has a driving axis. A motion-converting mechanism converts rotation of the first intermediate shaft only into linear reciprocating motion and thereby hammers the tool accessory along the driving axis. A rotation-transmitting mechanism transmits rotation of the second intermediate shaft to the output shaft and thereby only rotationally drives the output shaft around the driving axis.

Abstract: A dust collecting system includes a power tool and a dust collector. The power tool includes at least one battery-mounting part, a first motor, a driving mechanism and a body housing. The at least one battery-mounting part is each configured to removably receive a battery. The first motor is configured to operate with electric power supplied from the battery. The driving mechanism is configured to drive the tool accessory by power of the first motor. The body housing houses the first motor and the driving mechanism. The dust collecting system includes a control device configured to control operation of at least one of the power tool and the dust collector according to a state of the whole dust collecting system.

Abstract: A power tool having a rotary hammer mechanism is configured to produce hammering motion for driving a tool accessory along a driving axis and rotating motion for rotating the tool accessory around the driving axis. The power tool has a tool holder that is configured to removably hold the tool accessory. The tool holder has a rotation transmitting part configured to transmit rotating power to the tool accessory. A layer formed of carbide of a group 5 element of a periodic table is formed on the rotation transmitting part.

Abstract: A dust collection cup allows a bit tip to be viewable without being detached or replaced. A dust collection cup is attachable to a front cylindrical portion of a hammer drill. The dust collection cup in an attached state allows a bit attached to the front cylindrical portion to extend through the dust collection cup. The dust collection cup includes an attachment attachable to the front cylindrical portion, and a body connectable to the attachment. The body includes an extendable unit including at least a portion in an axial direction retaining a predetermined length.

Abstract: An electric power tool includes a motor, a driving side member, and a driven side member. The driving side member and the driven side member have mutually opposed surfaces. A plurality of cam teeth are respectively disposed on concentric circles on the opposed surfaces. The plurality of cam teeth have meshing surfaces inclined at predetermined lead angles. A torque limiter is formed to disengage the engagement of the meshing surfaces of the cam teeth by moving the one member in a separation direction from the other member when load of the driven side member increases. The respective cam teeth are formed such that the lead angles of the meshing surfaces are different between a forward rotation side and a reverse rotation side. A transmission torque transmitted from the driving side member to the driven side member is equal between the forward rotation and the reverse rotation.

Abstract: In a dust collector for electric power tool, while a casing includes a tubular suction opening portion disposed to protrude forward, a dust collecting route is formed in the casing to ensure capturing a dust suctioned with an air by a filter disposed in a dust box. The suction opening portion is abutted on a surface to be processed and a tool bit of a hammer drill is passable through the suction opening portion. The dust collecting route suctions the air from the suction opening portion and guides the air into the dust box disposed to the casing. The dust box includes a dust removal device (rubber) configured to directly act to the filter from outside to remove the dust accumulated on the filter.

Abstract: A power tool and a hook can withstand a shock load applied when being suspended. The hook includes a hook body, a hook support supporting the hook body, and a shock absorber that is compressible and located between the hook body and the hook support to absorb shock on the hook body.

Abstract: A power tool and a hook can withstand a shock load applied when being suspended. The hook includes a hook body, a hook support supporting the hook body, and a shock absorber that is compressible and located between the hook body and the hook support to absorb shock on the hook body.

Abstract: A dust collection cup includes a cylindrical attachment to cause a bit to extend through the attachment, a cylindrical dust collector located in front of the attachment to cause the bit to extend through the dust collector, a seal between the attachment and the dust collector and having a through-hole to receive the bit, and a connection port connectable to a dust collection hose and located on an outer circumferential surface of the attachment outward in a radial direction of the bit from the seal and rearward from the seal. The connection port has a distance in the radial direction of the bit from an axis of the attachment to an outermost position longer than a distance in the radial direction of the bit from the axis to a position on the outer circumferential surface of the attachment that is opposite to the outermost position from the axis.

Abstract: A power tool, such as a hammer drill (100), has first and second battery mount parts (160A, 160B) that are aligned in a longitudinal direction of the power tool. First and second batteries (170A, 170B) are mountable thereon in series along a straight line that extends in the longitudinal direction. The first battery (170A) is mounted on the first battery mount part (160A) by sliding along the straight line towards the second battery mount part (160B). The second battery (170B) is mounted on the second battery mount part (170B) by sliding along the straight line towards the first battery mount part (170A).