Gear-driven shears provided with a curved plate a movable jaw

Abstract

A gear-drive shear comprises two grips, the fixed jaw, and the movable jaw and gear wheel module. The fixed jaw and the first grip are connected together at a joint of plate assembly module. The corresponding ends of movable jaw and the second grip are installed on the first pivot axle and second pivot axle of the plate assemble module. This gear wheel module consists of two gears. They are installed between the corresponding ends of the movable jaw and the second grip on the plate assembly module respectively, among which, the same sides of these two gears jointly mesh with the tooth edge of the second grip, while the other side of the second gear wheel meshes with the tooth edge of the movable jaw. The characteristic of the invention is that one curved plate is installed additionally on one side of the movable jaw. Its first end is also installed on the first pivot axle of the plate assembly module sharing the same rotating point with the movable jaw. Meanwhile it is installed on the first edge of the curved plate together with the first tooth edge of the movable jaw. The second edge of the curved plate is equipped with wedge, which is locked in the notch on one side of the movable jaw. The middle section of curved plate is made into a curve. Therefore, mainly with the added curved plate, the rotating of the movable jaw is more flexibly and the pattern of the movable jaw is simplified so as to achieve the economic benefits of reducing production costs. Above are the functions and purposes of the invention.

Description

RELATED U.S. APPLICATIONS [0001] Not applicable. STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] Not applicable. REFERENCE TO MICROFICHE APPENDIX [0003] Not applicable. FIELD OF THE INVENTION [0004] The present invention relates generally to a gear-drive shear, and more particularly to a gear-drive shear which movable jaw provided with curved plate. BACKGROUND OF THE INVENTION [0005] This invention is the improvement based on the prior shear structure, especially the gear-drive shear. The characteristic of this shear structure differs from the general shear in that the movable jaw is not connected with driving grip, but by means of gear wheel module's inter-meshing so as to have an advantage in saving labor and splaying more easily and efficiently. [0006] The defects of the prior structure in practice are as follows: [0007] 1. One end of the movable jaw is rotating by means of gear's meshing with the gear wheel module. This structure is lack of flexibility des...

AI Technical Summary

Benefits of technology

[0012] 2. Mainly with the added curved plate, the opening and closing of the movable jaw is more flexible and intensive, and therefore result in a supplementary interplay to facilitate the user to use them more practically and effectively with less labor in operation. It meets the new-model patent requirement of advancement.

[0013] Also, with the added curved plate, the tooth edge of the movable jaw will be installed on the curved plate and change the previously integrality of the tooth edge. Because the curved plate is suitable to be made of flexible materials, it is easier to process the tooth edge. While the movable jaw which must be made of hard steel can also omit the tooth edge so as to simplify the structure and decrease the processing difficulty. As for the industry, it can therefore reduce production costs and produce better products.

Problems solved by technology

This structure is lack of flexibility despite the character of toughness because the movable jaw is made of hard steel as a whole.

Therefore when trimming sticks, it is easier to cause a troublesome problem of being blocked off no matter when it is closing or opening.

But the cost of material is comparatively high and it is not easy to produce so the integrative gear structure started from the end of jaw will obviously increase costs and it acts against economic benefits.

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