Adjustable spanner

Abstract

The invention discloses an adjustable spanner having a C-shaped receiving chamber to receive a driving roller. One side of the receiving chamber communicates to a straight receiving groove which reduces the structural destructiveness of the fixed jaw area and forms quickly the one single knife processing and discharges out of the receiving groove. In addition, the anti-fault concave surface design formed by the inside opening of the fixed jaw prevents the user's operating error; anohobe formed by the ladder shape of the front and back sides of the inside movable jaw allows a larger space for the nut reversely rotating so that, the wheel reversible adjustable spanner clamping the nut, the reverse rotating can be smooth.

Description

technical field [0001] The invention relates to the improvement of a roller-type reversible adjustable wrench, especially an adjustable wrench with simplified structural space shape design, easy processing and good structural strength, and belongs to the field of hand tool technology development. Background technique [0002] When a traditional adjustable wrench turns a bolt (nut), after turning the bolt by an angle, the adjustable wrench must separate from the nut, return to the original angle and engage with the nut again. It is troublesome to realize the locking and unloading of bolts (caps) in use. [0003] In order to improve the complex and time-consuming defects of traditional adjustable wrench, the inventor has invented a reversible adjustable wrench and obtained the invention patent of "Roller Type Reversible Adjustable Wrench" No. 511564 in Taiwan. The core technology of this patent lies in : The fixed jaw of the movable wrench is provided with an open chamber, wh...

AI Technical Summary

Problems solved by technology

[0006] 2. Difficult to process: Due to the structural reasons of the elastic parts, it is necessary to mill out a fan-shaped groove on the two cover pieces for the retraction and displacement of the elastic parts, and mill a fan-shaped groove on the small-area cover piece for processing It is more difficult and time-consuming. In addition, the setting of the fan-shaped groove will also increase the overall cost of the wrench

[0007] 3. Poor structural strength: the chamber on the fixed jaw is designed to be open at three ends, and the chamber is a partly hollowed out structure, and the left and right cover pieces are closed with screws, and the fixed jaw that bears the torsion torque is Partially through the hollow, this structure causes a significant reduction in the structural strength of the fixed jaw, which not only affects the strength of the fixed jaw to withstand the torque of the nut in the future, but also causes the product to lose its market competitiveness

[0010] Item 1: Because the nut is known to be reversible, as shown in Figures 7a to 7c of this invention, it is known that when the wrench is reversed, one end of the nut is pressed against the driving roller and retracted, making the space larger. The hand can move around the nut. However, the inner side of the movable jaw is a horizontal section, and there is no room for the rotation of the top corner of the nut. As a result, the reverse rotation process of the nut cannot achieve the ideal smooth goal.

[0011] The second item: As shown in Figure 15, the original roller type reversible adjustable wrench, the inner side of the fixed jaw and the movable jaw are designed with a horizontal section. For first-time users, it is very likely that after adjusting the movable jaw to the corresponding width of the nut, the The front ends of the two jaws are formed with a horizontal section for the nut to be aligned. That is, the horizontal section is used to abut against the nut to achieve the purpose of turning. The inner sides of the two jaws are designed with a horizontal section, and the adjustable wrench is lost. The reversible flip function

[0012] Item 3: When the original roller-type reversible adjustable wrench is reversed, the driving roller pressed by the nut will shrink inward and create an opening, causing dust in the air to fly in through the opening, causing dust to accumulate in the chamber, and in severe cases Insufficient retraction displacement of the drive roller, resulting in loss of the reverse rotation function of the adjustable wrench

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