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Chopping knife

A rivet and thread technology, which is applied in the field of thread rivets, can solve the problems of difficult workpiece splitting, etc., and achieve the effects of increasing volume and weight, reducing product cost, and being convenient to use.

Inactive Publication Date: 2014-06-11
POSITEC POWER TOOLS (SUZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shape of the common thread rivet is conical. When the conical thread rivet is screwed into the workpiece, it is easy to screw out a conical hole in the workpiece, but it is difficult to split the workpiece.

Method used

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  • Chopping knife

Examples

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Effect test

Embodiment Construction

[0023] See figure 1 , The riving knife 1 of this embodiment is a threaded riving knife that rotates under the drive of a power source, and includes a threaded conical section 2, a threaded frustoconical section 4 and a threaded cylindrical section 6 connected in sequence.

[0024] The threaded conical section 2 has a head 8 and a tail 10 . Wherein, the head 8 is a cone point.

[0025] The smaller the taper angle α of the threaded cone section 2 is, the easier it is for the riving knife 1 to screw into the workpiece; but if the taper angle α of the threaded cone section 2 is too small, the strength of the threaded cone section may not be sufficient. In this embodiment, preferably, the taper angle of the threaded conical section 2 is greater than or equal to 15 degrees and less than or equal to 35 degrees. More preferably, the taper angle of the threaded conical section 2 is 25 degrees. With such arrangement, the threaded conical section 2 can be smoothly screwed into the wor...

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Abstract

The invention provides a chopping knife. The chopping knife comprises a threaded conical section and a threaded truncated conical section, wherein the threaded conical section is provided with a head part and a tail part; the threaded truncated conical section is provided with a first end part with a smaller diameter and a second end part with a larger diameter, the first end part is connected with the tail part, the diameter of the first end part and the diameter of the tail part are equal, and the taper angle of the threaded truncated conical section is greater than the taper angle of the threaded conical section; the chopping knife additionally comprises a threaded cylindrical section which is connected with the threaded truncated conical section, wherein the diameter of the cylindrical section and the diameter of the second end part are equal. The threaded truncated conical section can expand wood to enable the wood to be easily cracked, the threaded cylindrical section can continuously expand the wood, the size and the weight of a conical head are not obviously increased, the product cost is reduced and the chopping knife is convenient to use.

Description

technical field [0001] The invention relates to a splitter used in a wood splitter, in particular to a screw splitter. Background technique [0002] Wood splitters are used to split large logs into smaller, more usable lumber and are used in a wide variety of applications. As the working head of the wood splitter, the chopping knife is very important for the wood splitter. There are two types of cleavers commonly used, one is a wedge cleaver and the other is a thread cleaver. The wedge-shaped splitter is similar to an axe. To split the workpiece, the wood splitter equipped with the wedge-shaped splitter must provide enough power for the splitter to split the workpiece. Therefore, this type of wood splitter usually uses gasoline as power, cylinder As a transmission mechanism, this causes the wood splitter to be bulky, unusually heavy, inconvenient to carry, and inconvenient to use. The thread splitter is driven by a motor to rotate. Relatively speaking, the wood splitter e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27L7/04
Inventor 姜义邦陈秀连王明祥
Owner POSITEC POWER TOOLS (SUZHOU) CO LTD
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