A ratchet tool includes an insert engaged in a handle, and a shaft rotatably engaged through the insert, the shaft includes a non-circular hole for engaging with a tool bit, and a number of teeth formed on the shaft, a detent is engaged in the shaft and engageable with the tool bit, the insert includes a head having two or more pawls for engaging with the teeth of the shaft and for determining a driving direction of the shaft by the insert, a sleeve is rotatably engaged onto the shaft and engageable with the detent for forcing the detent to engage with the tool bit, and a control ferrule is engaged onto the shaft and the sleeve for moving the sleeve relative to the shaft.

Examples of the present disclosure relate to ratchets and include ratchets having a positive stop ratchet mechanism which controls the movement of a pawl and/or pusher with various geometric configurations and using various materials.

A speed increasing bidirectional mechanical converter, including a main shaft and a speed increasing planet gear unit is disclosed. The speed increasing planet gear unit includes a first ring gear, a planet gear, a sun gear and a planet carrier, wherein the planet gear is mounted on the planet carrier. The planet gear is arranged between the first ring gear and the sun gear, and rotates in an opposite direction against the sun gear. The speed increasing bidirectional mechanical converter further includes a reversing means, via which the first ring gear and the sun gear drive the main shaft. When in use, the planet carrier is kept still, and the main shaft rotates in the preset direction. The speed increasing bidirectional mechanical converter realizes the direction reverse by using the speed increasing planet gear unit, which simplifies the structure, facilitates the manufacture and decreases the space it occupies and its weight. A screwdriver and a wrench having the speed increasing bidirectional mechanical converter are provided.

A speed increasing bidirectional mechanical converter, including a main shaft and a speed increasing planet gear unit is disclosed. The speed increasing planet gear unit includes a first ring gear, a planet gear, a sun gear and a planet carrier, wherein the planet gear is mounted on the planet carrier. The planet gear is arranged between the first ring gear and the sun gear, and rotates in an opposite direction against the sun gear. The speed increasing bidirectional mechanical converter further includes a reversing means, via which the first ring gear and the sun gear drive the main shaft. When in use, the planet carrier is kept still, and the main shaft rotates in the preset direction. The speed increasing bidirectional mechanical converter realizes the direction reverse by using the speed increasing planet gear unit, which simplifies the structure, facilitates the manufacture and decreases the space it occupies and its weight. A screwdriver and a wrench having the speed increasing bidirectional mechanical converter are provided.

A torque tool is provided, including: a main body, a driving portion, a torque mechanism and an adjusting mechanism. The main body defines an axial direction. The driving portion is disposed on an end of the main body. The torque mechanism is non-rotatably disposed within the main body. The adjusting mechanism includes a plurality of first engaging portions disposed on the main body and an adjusting member rotatably disposed on the main body, and the adjusting member includes a plurality of second engaging portions releasably engaged with the plurality of first engaging portions. The main body defines a center line parallel to the axial direction, and as viewed in the axial direction, hypothetical lines extending between the plurality of second engaging portions and the center line define a plurality of included angles, and at least two of the plurality of included angles have different angle sizes.

A torque tool is provided, including: a main body, a driving portion, a torque mechanism and an adjusting mechanism. The main body defines an axial direction. The driving portion is disposed on an end of the main body. The torque mechanism is non-rotatably disposed within the main body. The adjusting mechanism includes a plurality of first engaging portions disposed on the main body and an adjusting member rotatably disposed on the main body, and the adjusting member includes a plurality of second engaging portions releasably engaged with the plurality of first engaging portions. The main body defines a center line parallel to the axial direction, and as viewed in the axial direction, hypothetical lines extending between the plurality of second engaging portions and the center line define a plurality of included angles, and at least two of the plurality of included angles have different angle sizes.

The mechanical technology of converting oscillatory motion, into one direction of rotation, as described and claimed in U.S. Pat. No. 5,881,609, while being efficient, useful and having numerous applications, has its disadvantage of not being able to function unless user employs both hands; one hand to apply oscillatory motion to an input, while opposite hand immobilizes the axial rotation of the converting gear-train, in order for the conversion to be activated. Hence, the goal of this documentation, is to teach several different means, that maintain the immobility of axial rotation of the dual-drive gear train in order to activate the dual-drive feature, without the use of either of user's hands, thereby conveniently leaving one of user's hands available for holding a work piece.

The mechanical technology of converting oscillatory motion, into one direction of rotation, as described and claimed in U.S. Pat. No. 5,881,609, while being efficient, useful and having numerous applications, has its disadvantage of not being able to function unless user employs both hands; one hand to apply oscillatory motion to an input, while opposite hand immobilizes the axial rotation of the converting gear-train, in order for the conversion to be activated. Hence, the goal of this documentation, is to teach several different means, that maintain the immobility of axial rotation of the dual-drive gear train in order to activate the dual-drive feature, without the use of either of user's hands, thereby conveniently leaving one of user's hands available for holding a work piece.

A spiral ratchet driver with crank and slider mechanism comprises a spiral ratchet driver having a shank housing, a journal having a hole, connected to the shank housing by a screw, a ratchet mechanism assembly connected adjacent to the journal, a shank received in the shank housing and the ratchet mechanism assembly, a spindle having a spindle bearing connecting the second end of the shank to a chuck or a square drive, a lever connecting bar connected to the hole of the journal by means of a first rivet, a lever having a lever handle cushion grip, rotatably connected with the lever connecting bar, a handle bar having a handle bar grip on a free end, connected with the lever below the handle grip and connected with the spindle from a fixed end, a journal housing covering the journal, is connected with the handle bar and four or more bearing slides disposed between journal and the journal housing.

A spiral ratchet driver with crank and slider mechanism comprises a spiral ratchet driver having a shank housing, a journal having a hole, connected to the shank housing by a screw, a ratchet mechanism assembly connected adjacent to the journal, a shank received in the shank housing and the ratchet mechanism assembly, a spindle having a spindle bearing connecting the second end of the shank to a chuck or a square drive, a lever connecting bar connected to the hole of the journal by means of a first rivet, a lever having a lever handle cushion grip, rotatably connected with the lever connecting bar, a handle bar having a handle bar grip on a free end, connected with the lever below the handle grip and connected with the spindle from a fixed end, a journal housing covering the journal, is connected with the handle bar and four or more bearing slides disposed between journal and the journal housing.