Power tool and mechanism
DCFirst Claim
1. A power tool comprising a housing, a gearbox having an input end capable of being mounted on a motor and an output end adjacent an aperture in the housing, the gearbox being epicyclic and including a torque control ring which, when held stationary with respect to said housing, permits the gearbox to transmit torque and which, when permitted to rotate in the housing, disables torque transmission by the gearbox;
- and an application mechanism driven by said gearbox, said mechanism comprises;
a) a substantially cylindrical hollow body;
b) a chuck drive spindle journalled in said body and defining therebetween an annular space;
c) means limiting axial movement of said spindle in said body towards said gearbox;
d) a rotary ratchet plate fixed on said spindle;
e) a facing, rotationally fixed ratchet plate in said body;
f) means to engage said ratchet plates together such that on rotation of the spindle a reciprocating action is imposed thereon, said means to engage including a lever projecting through a slot in said body;
g) resiliently biased, adjustable actuating means mounted on said body to selectively engage said torque control clutch ring, said lever projecting through said actuating means.
1 Assignment
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Accused Products
Abstract
A power tool has an application mechanism (300) for connection to the output of an epicyclic gearbox provided with a torque control ring. The mechanism has a body (310) journalling a chuck spindle (302). Outside the body is a clutch control arrangement comprising balls (334,336) pressed against the torque control ring by individual springs (330) controlled by a control ring (322) threaded on the body. The mechanism includes a hammer arrangement having rotary and fixed ratchet plates (378,376) and cam ring (308) operable to engage and separate the plates by a lever (360) which projects between the springs (330).
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Citations
10 Claims
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1. A power tool comprising a housing, a gearbox having an input end capable of being mounted on a motor and an output end adjacent an aperture in the housing, the gearbox being epicyclic and including a torque control ring which, when held stationary with respect to said housing, permits the gearbox to transmit torque and which, when permitted to rotate in the housing, disables torque transmission by the gearbox;
- and an application mechanism driven by said gearbox, said mechanism comprises;
a) a substantially cylindrical hollow body; b) a chuck drive spindle journalled in said body and defining therebetween an annular space; c) means limiting axial movement of said spindle in said body towards said gearbox; d) a rotary ratchet plate fixed on said spindle; e) a facing, rotationally fixed ratchet plate in said body; f) means to engage said ratchet plates together such that on rotation of the spindle a reciprocating action is imposed thereon, said means to engage including a lever projecting through a slot in said body; g) resiliently biased, adjustable actuating means mounted on said body to selectively engage said torque control clutch ring, said lever projecting through said actuating means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- and an application mechanism driven by said gearbox, said mechanism comprises;
Specification