JP2003117846A - Speed change driver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a speed change driver allowing smooth mounting and removal of a screw, bolt, etc., by decreasing the number of revolutions of a shaft 4 through turning of a decelerating handle 2 and increasing the number of revolutions of the shaft 4 through turning of an accelerating handle 3. SOLUTION: The speed change driver includes the decelerating handle 2, accelerating handle 3, and the shaft 4, and gears having different numbers of teeth are combined with the part of the shaft 4 so that it is possible to change the number of revolutions of the shaft part by turning either the decelerating 2 or the accelerating handle 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screwdriver, which can be quickly attached / detached when attaching / detaching long screws or the like.
The screws can be attached and removed with a light force.

[0002]

2. Description of the Related Art The conventional technology is supported only by the shape in which the handle and the shaft 4 are integrated.

[0003]

[Problems to be Solved by the Invention] In the present invention, when tightening or unscrewing a screw, the handle had to be turned as much as the screw was cut, but the screw was attached and detached at a slight rotational speed. You can do it. In addition, when a force is applied, the handle will rotate more, but the work of attachment / detachment can be performed with a small force.

[0004]

To solve the above-mentioned problems, in order to reduce the rotation of the shaft 4 with respect to the rotation of the reduction handle 2, as shown in FIG. The large gear 6 is fixed, and two small gears having different numbers of teeth are combined so that the large gear 6 for reduction and the small gear 5 for reduction are engaged with each other. The deceleration shaft 12 is attached so as to be engaged with, and attached there. The small gear 5 for reduction is fixed to the handle 2 for reduction, and the shaft 4 is attached.
It is attached with a washer 15 and a screw 1 so that the fitting shaft 4 and the deceleration handle 2 rotate. Acceleration handle 3
In order to rotate the shaft 4 with respect to the rotation of the shaft 4, the flange 1
The small gear for acceleration 8 is fixed to 1, and the small floating gear for acceleration 8 and the large gear for acceleration 7 are made into the floating floating gear for acceleration 10 which combined two gears with different numbers of teeth so that they would mesh. The acceleration shaft 13 is attached so that they normally mesh, and the acceleration floating gear 10 is fitted therein. The large gear 7 for acceleration is fixed to the handle 3 for acceleration, and the bush 14 is fixed on the shaft 4. The tip of the shaft 4 is attached with a metal fitting having a shape suitable for the head of a screw such as a plus or a minus or a box depending on the application.

[0005]

According to the present invention, as shown in FIG. 3, the handle portion is divided into the deceleration handle 2 and the acceleration handle 3, and when the deceleration handle 2 is rotated by applying a load to the shaft 4, the handle is fixed to the deceleration handle 2. The rotation of the deceleration floating gear 9 is decelerated because the deceleration small gear 5 having a small number of teeth rotates to rotate the gear with many teeth of the deceleration floating gear 9, and the decelerated floating gear 9 is decelerated. The gear having a small number of teeth and the large reduction gear 6 having a large number of teeth are engaged and rotated. The speed is reduced even in this portion, so that the rotation is reduced with respect to the reduction handle 2 and the shaft 4 rotates with a strong force. When the acceleration handle 3 is rotated without rotating the deceleration handle 2, the acceleration large gear 7 having a large number of teeth fixed thereto is rotated to rotate the gear having a small number of teeth of the floating floating gear 10 for acceleration. Therefore, the rotational speed of the accelerating floating gear 10 increases. When the gear having a large number of teeth of the accelerated floating gear 10 and the accelerating small gear 8 fixed to the shaft 4 are engaged and rotated, the number of rotations also increases in this portion. Therefore, the rotation speed of the shaft 4 is larger than that of the acceleration handle 3.

[0006]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 4 show the first embodiment, in which a screw, a screw or the like is attached to the attaching / detaching portion 13 and moved to a desired position for fitting, and the handle is rotated while being pressed in the fitting direction. If it rotates lightly, hold the deceleration handle 2 with your hand, and rotate the acceleration handle 3 to rotate the shaft 4 more than the acceleration handle 3, so you can tighten it quickly. If tightening is loose, handle 2 for deceleration
If you rotate while pressing in the direction of fitting, you can tighten with a stronger force than that rotation. To remove
You can do the reverse process.

The handle may be divided into three parts and one place may be directly connected to the shaft 4.

The removable part 16 can be replaced according to various uses.

The deceleration handle 2 and the acceleration handle 3 may be fixed by a lock.

Single screwdrivers for deceleration and acceleration may be used.

[0012]

[0013]

[0014]

As described above, according to the present invention, long bolts and screws can be quickly attached / detached and can be attached / detached with a little force.

[Brief description of drawings]

FIG. 1 is a front view of a first embodiment of the present invention.

FIG. 2 is a sectional view of the first embodiment of the present invention.

FIG. 3 is an enlarged view of the first embodiment of the present invention.

FIG. 4 is an exploded view of the first embodiment of the present invention.

[Explanation of symbols] 1. Screw 2. Deceleration handle 3. Acceleration handle 4. axis 5. Small gear for reduction 6. Large gear for reduction 7. Large gear for acceleration 8. Small gear for acceleration 9. Floating gear for reduction 10. Floating gear for acceleration 11. Flange 12. Axis for deceleration 13. Acceleration axis 14. bush 15. Washer

Claims (3)

[Claims] 1. A speed change driver, in which a small reduction gear 5 is fixed to a reduction handle 2 and a large reduction gear 6 is fixed to a shaft 4, and a floating floating gear 9 is engaged with the rotation to change the rotation of the shaft 4. Like The device configured as described above. 2. In a variable speed driver, a large acceleration gear 7 is fixed to an acceleration handle 3 and a small acceleration gear 8 is fixed to a shaft 4, and a floating floating gear 10 is engaged with the shaft 4 to make a shaft.
A device designed to increase the number of rotations. 3. A device as a speed change driver having both a deceleration handle 2 and an acceleration handle 3 constructed as in claim 1 and claim 2.