Hand tool having a quick driving effect

A hand tool includes a driving member, and a wrench body mounted on the driving member. The wrench body includes a handle, a driving head mounted on an end of the handle, and a locking portion rotatably mounted on the driving head and inserted into the mounting hole of the driving member. Thus, the wrench body can drive the driving member to rotate through 360 degrees reciprocally so as to rotate and unscrew the nut successively, so that the driving member can be used to unscrew the workpiece easily and rapidly.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a hand tool, and more particularly to a hand tool having a quick driving effect.

2. Description of the Related Art

A conventional wrench comprises a wrench body having a handle and a driving head mounted on an end of the handle for driving a workpiece, such as a nut or the like. Thus, the driving head is driven by the handle to rotate the nut. However, after the nut is rotated to a determined angle, movement of the handle is limited and the driving head cannot be further rotated, so that the user has to remove the driving head from the nut to adjust the position of the driving head relative to the nut and then to mount the driving head on the nut again so as to drive the nut to rotate, thereby causing inconvenience to the user in operation of the wrench.

SUMMARY OF THE INVENTION

The primary objective of the present invention is to provide a hand tool having a quick driving effect.

Another objective of the present invention is to provide a hand tool, wherein the wrench body can drive the driving member to rotate through 360 degrees reciprocally so as to rotate and unscrew the nut successively, so that the driving member can be used to unscrew the workpiece easily and rapidly.

A further objective of the present invention is to provide a hand tool, wherein the wrench body co-operates with the driving member to function as a ratchet socket wrench, thereby facilitating the user operating the workpiece.

In accordance with the present invention, there is provided a hand tool, comprising:

a driving member, and a wrench body mounted on the driving member for driving the driving member, wherein:

the driving member has a first end formed with a mounting hole;

the wrench body includes a handle, a driving head mounted on an end of the handle, and a locking portion rotatably mounted on the driving head and inserted into the mounting hole of the driving member.

DETAILED DESCRIPTION OF THE INVENTION

Referring to the drawings and initially toFIGS. 1-5, a hand tool in accordance with the preferred embodiment of the present invention comprises a driving member20, and a wrench body10mounted on the driving member for driving the driving member20.

The driving member20has a first end formed with a mounting hole21and a second end provided with a stud-shaped mounting portion25. The mounting hole21of the driving member20has a wall provided with a plurality of ratchet teeth22.

The wrench body10includes a handle11, a driving head12mounted on an end of the handle11, and a locking portion13rotatably mounted on the driving head12and inserted into the mounting hole21of the driving member20.

The locking portion13of the wrench body10has a lower end provided with a plurality of locking teeth16meshing with the ratchet teeth22of the driving member20. The locking portion13of the wrench body10has an upper end formed with an annular groove14for securing an elastic sealing ring15which is received in the mounting hole21of the driving member20. Preferably, the sealing ring15has an outer diameter slightly greater than a diameter of the mounting hole21of the driving member20, so that the sealing ring15is closely urged on the wall of the mounting hole21of the driving member20, and the locking portion13of the wrench body10is combined with the driving member20rigidly and stably.

The mounting hole21of the driving member20has a bottom formed with an annular depression23located below the ratchet teeth22for securing a snap ring24which is rested on the lower end of the locking portion13of the wrench body10to prevent the locking teeth16from protruding outward from the driving member20.

In operation, the mounting portion25of the driving member20is mounted on a socket30(seeFIG. 2) which is mounted on a nut40(see FIG.5). Then, the handle11of the wrench body10is driven to rotate the driving member20. At this time, the locking teeth16of the wrench body10mesh with the ratchet teeth22of the driving member20, so that the driving member20is driven by the wrench body10to rotate about the mounting portion25so as to unscrew the nut40previously.

Then, the driving head12of the wrench body10is driven by the handle11to rotate the driving member20. At this time, the locking portion13of the wrench body10is locked on the driving member20and is mounted on the driving head12, so that the driving head12of the wrench body10can be rotated relative to the locking portion13of the wrench body10and the driving member20.

Thus, when the driving head12of the wrench body10is driven, the driving head12of the wrench body10can exert a force on the locking portion13of the wrench body10to drive the driving member20to rotate about the mounting portion25, so that the driving member20can be moved from the position as shown inFIG. 2to the position as shown inFIG. 4, then to the position as shown in FIG.5and finally to the original position as shown in FIG.2.

Accordingly, the wrench body10can drive the driving member20to rotate through 360 degrees reciprocally so as to rotate and unscrew the nut40successively, so that the driving member20can be used to unscrew the nut40easily and rapidly. In addition, the wrench body10co-operates with the driving member20to function as a ratchet socket wrench, thereby facilitating the user unscrewing the nut40.

Referring toFIG. 6, the hand tool in accordance with another embodiment of the present invention is shown, wherein the driving member20has a second end provided with a recessed mounting portion26.

Referring toFIGS. 7-9, the hand tool in accordance with another embodiment of the present invention is shown, wherein the mounting hole21of the driving member20has an upper end formed with an annular groove28located above the ratchet teeth22, the driving head12of the wrench body10is formed with a stepped hole52, and the locking portion13of the wrench body10has a side formed with a receiving chamber51communicating with the stepped hole52. The indication14inFIGS. 8 and 9indicates the annular groove28at another side of the locking portion13.

The hand tool further comprises a quick release mechanism60mounted between the wrench body10and the driving member20, so that the wrench body10can be detached from the driving member20quickly.

The quick release mechanism60includes a substantially T-shaped control rod61movably mounted in the stepped hole52of the driving head12and having a lower end formed with a convex portion64and a concave portion65located above the convex portion64, a first spring62mounted in the stepped hole52of the driving head12and urged on the control rod61for pushing the control rod61upward, a first ball63mounted in the receiving chamber51of the locking portion13and rested on the convex portion64of the control rod61, a second ball630mounted in the receiving chamber51of the locking portion13and locked in the annular groove28of the driving member20, and a second spring620mounted in the receiving chamber51of the locking portion13and urged between the first ball63and the second ball630. Preferably, the first spring62has a first end urged on a wall of the stepped hole52of the driving head12and a second end urged on an enlarged upper end of the control rod61.

In operation, the control rod61is pushed upward by the first spring62, so that the first ball63is rested on the convex portion64of the control rod61as shown in FIG.8. When the control rod61is pressed downward, the first ball63is received in the concave portion65of the control rod61as shown inFIG. 9, to restore the second spring620so that the second ball630is detached from the annular groove28of the driving member20, and the wrench body10can be detached from the driving member20quickly.

Referring toFIGS. 10 and 11, the hand tool in accordance with another embodiment of the present invention is shown, wherein the quick release mechanism60only includes a ball63rested on a wall of the lower end of the control rod61and locked in the annular groove28of the driving member20.

In operation, the control rod61is pushed upward by the spring62, so that the ball63is rested on the wall of the lower end of the control rod61and locked in the annular groove28of the driving member20as shown in FIG.10. When the control rod61is pressed downward, the ball63is received in the concave portion65of the control rod61as shown inFIG. 11, so that the ball63is detached from the annular groove28of the driving member20, and the wrench body10can be detached from the driving member20quickly.