摘要:
A combustion type power tool capable of performing cleaning to a cleaning target from outside of the tool without disassembly of a head cover and a head cap. In the head cap, first and second cleaning passages are formed. The first cleaning passage has one end open to an atmosphere and a closed inner end. The second cleaning passage has one end in communication with the first cleaning passage and another end open to a spark generating portion which is one of the cleaning target in the combustion type power tool. A check valve is disposed in the first cleaning passage for normally closing the one end of the first cleaning passage by a biasing force of a compression coil spring.
摘要:
An impact drill includes a first ratchet rotating along with a spindle and movable in an axial direction, a second ratchet engaged with the first ratchet and movable in a axial direction but unrotatable, and a spring provided between the second ratchet and a partial member of a housing. An amount of movement of the spindle in the axial direction is regulated, so that the pressing force is too excessive, the restoring force of the spring urging the second ratchet is controlled to maintain a state of generating a set stroke force.
摘要:
An impact drill minimizing transmission of vibration to a handle gripped by a user's hand. A spindle extends through a main frame and is movable in its axial direction and rotatable about its axis. A first ratchet is rotatable and axially movable together with the spindle. A second ratchet is axially movable but unortatable. The first ratchet has a first serrated surface and the second ratchet has a second serrated surface in confrontation with the first serrated surface. In an impact drilling mode, the first serrated surfaces is brought into abutment with the second serrated surface so that the spindle is reciprocally moved in the axial direction. A first spring is interposed between the main frame and the second ratchet to urge the second ratchet toward the first ratchet. A second spring is interposed between the main frame and the second ratchet to urge the second ratchet away from the first ratchet. In the impact drilling mode, the second ratchet is always out of contact from the main frame and is floatingly maintained within the main frame.
摘要:
In a motor-driven tool, a carbon brush part 8 is arranged between a suction port 6 and a commutator 11 of the motor and includes a cylindrical side wall 8a. The cylindrical side wall 8a located on an outer periphery of the commutator 11 is provided with a tapered portion 8b which grows wider toward the commutator 11 and grows narrower toward a coil end 10 of the armature. Between the carbon brush part 8 and the coil end 10, there is provided a heat radiating plate 4 made of metal and adapted to be engaged with the carbon brush part 8.
摘要:
A two cycle engine has an exhaust port provided in a side portion of a cylinder, and a scavenge air port provided in the side portion of the cylinder so as to be symmetrical with a plane passing through a center in a cylinder circumference direction of the exhaust port and an axis extending to inside of the cylinder, the scavenge air port is structured such that an axis extending to inside of the cylinder from an opening of the scavenge air port extends in such a direction as to be away from the exhaust port of the cylinder, and is divided in a cylinder axis direction by a dividing portion.
摘要:
A centrifugal machine includes a vibration preventive mechanism part containing a support member and a damping portion disposed in the support member so as to be connectable or contactable to the drive device. The damping portion includes a magnet member and a friction member disposed on the support member and, owing to the magnetic force of the magnet member, the friction member is contacted with a first arm member. The magnet member can be magnetized by an electromagnetic coil and, owing to the magnetic force of the magnet member, the friction member can be contacted with the first arm member. On receiving a vibration change from a drive device, the vibration preventive mechanism part can dampen the vibration change using the damping portion.
摘要:
A centrifugal machine comprises a box member; a drive device mounted within the box member and having a rotation shaft; a rotor connected to the rotation shaft of the drive device for holding a specimen to be centrifuged; and, a damper for mounting the drive device into the box member, wherein the centrifugal machine further includes a vibration preventive mechanism part, the vibration preventive mechanism part containing a support member to be supported by the box member and a damping portion disposed in the support member so as to be connectable or contactable to the drive device, and also wherein, on receiving a vibration change from the drive device, the vibration preventive mechanism part can dampen the vibration change using the damping portion.
摘要:
An impact drill includes a first ratchet together with a spindle and movable in an axial direction, and a second ratchet engageable with the first ratchet. The second ratchet can be moved in the axial direction, and rotated with a predetermined range in a rotational direction.
摘要:
An impact tool for reducing noise without lowering the tightening ability. The impact tool gives a rotary blow force to a tip tool by mounting a rotary blow mechanism on a spindle rotatably driven by a motor and intermittently transferring the rotary blow force generated by the rotary blow mechanism from a hammer to the tip tool via an anvil, damping materials absorbing at least the vibration in the radial direction are arranged on at least one side of both supports of the axial direction of the spindle 7. The damping material is interposed between a bearing that rotatably supports the rear end portion of the spindle and an inner cover that holds the same, and an O-ring is interposed as a damping material between the front end portion of the spindle and an anvil that rotatably supports the same.
摘要:
An impact tool comprising a motor, a hammer 8 that is rotated and axially moved by a drive force of the motor, an anvil 3 that repeats engagement/disengagement from the hammer 8 accompanying rotation and axial movements of the hammer 8, and a tip tool 4 mounted to the anvil 3, the anvil 3 comprising a first split piece 3A, which includes pawls 3c (first concave-convex part) on an opposite side to the hammer and repeats engagement/disengagement from the hammer 8, a second split piece 3B, which includes pawls 3f (second concave-convex part) engageable with the pawls (first concave-convex part) 3c of the first split piece 3A in a direction of rotation, and to which the tip tool 4 is mounted, and a rubber damper (elastic body) 13 interposed between the first and second split pieces 3A, 3B to prevent direct contact between the pawls (first concave-convex part) 3c and the pawls (second concave-convex part) 3f in the direction of rotation and in an axial direction.