Three-gear manual rotating tool

Abstract

The invention provides a three-gear manual screwdriver, belonging to the manual tool; the prior art has a defect that the original function is lost while realizing the positioning orientation function. The three-gear manual screwdriver achieves the conversion in three gears of a roller correspondingly to a handle and a workpiece by a gear-shifting part; when in a positive gear, the handle can be rotated to transmit the positive torque only towards the workpiece rod by a positive torque transmission roller; when in a reverse gear, the handle can be rotated to transmit the reverse torque only towards the workpiece rod by a reverse torque transmission roller; when in a bidirectional gear, the handle can be rotated to transmit the positive torque towards the workpiece rod by the positive torque transmission roller and also can transmit the reverse torque towards the workpiece rod by the reverse torque transmission roller, thus having both functions of oriented torque transmission and traditional bidirectional torque transmission.

Description

technical field [0001] The invention belongs to hand tools, in particular to a three-speed hand screwdriver. Background technique [0002] Manual screwdriver is a kind of manual tool that holds the handle by hand and rotates to drive the working rod to apply torque to the corresponding parts. A screwdriver (also called a screwdriver) is a representative example. The traditional The manual screwdriver is used to fix the working rod and the handle together. When using it, such as tightening or loosening a screw with a screwdriver, since the hand holding the handle can only rotate a small angle, when it is necessary to adjust a part When rotating multiple times in a row, it is necessary to stop and let the hand turn an angle in the opposite direction. Sometimes the hand-held screwdriver is temporarily withdrawn from the part to achieve the reverse rotation. This method needs to align the screwdriver with the part again, sometimes with another One hand assists the hand holding ...

AI Technical Summary

Problems solved by technology

[0004] 1. At least two shiftable clutches are required to realize the "orientation" function, and two clutch sections and one neutral section are set on the working rod, which has a complex structure

[0005] 2. In order to ensure that the clutch can slide in the inner cavity, the reliability of the combination of the clutch and the handle is lost, so the torque it bears is difficult to meet the requirements

[0006] 3. When the two clutches slide and shift in the inner cavity, their movement is between the clutch section and the neutral section with different diameters, and the reliability is poor. In severe cases, the roller may lose the cooperation with the clutch section.

[0007] 4. The handle of this patent solution is composed of two parts. After the assembly of the working rod, clutch and push button is completed, the two parts constituting the handle are welded together, so the repairability of the tool is poor when it fails.

[0009] 1. Although a pair of bearings are used to fix the main shaft, the knife body needs to be inserted into the fixing hole of the main shaft when in use, so even if the main shaft does not swing, it is difficult to ensure that the knife body swings relative to the main shaft, which affects the use;

[0010] 2. There is an opening on the handle wall at the tooth top of the ratchet, and the reversing plate with positive and negative pawls is hinged at the opening along the axial direction of the handle. Such a structure leads to poor integrity of the handle, which is not conducive to holding by hand, and , the opening of the handle wall at the tooth top of the ratchet is open, and some debris and dust are easy to enter the inner cavity of the handle, affecting the cooperation between the forward and reverse pawls and the forward and reverse ratchets, and affecting the flexible rotation of the main shaft;

[0011] 3. The patent achieves orientation by setting forward and reverse pawls and forward and reverse pawls, the structure is complex and the cooperation is not precise

[0012] In addition, the above two patent solutions only have the function of one-way work, that is, they apply torque in the forward direction in one gear position and idle in the reverse direction, and apply torque in the reverse direction in the other gear position while idling in the forward direction, and It cannot apply torque in both forward and reverse directions at the same time like traditional manual screwdrivers, and such a function is also of practical significance in actual use, so the two patent solutions realize their "orientation" function However, it lost the original function of applying torque in both forward and reverse directions.

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