Portable log splitter

Abstract

A portable log splitter (see figures) is formed by an assembly kit of a power unit (I) comprising an engine (Ia) and a gearbox (Ib) and a work tool (II) comprising a drive shaft (1) equipped with an expansion mechanism (2) and a splitting thread cone (3). The work tool (II) and the output shaft (4) of the gearbox (Ib) are provided with element parts for repeated connection and disconnection, while the drive shaft (1) of the work tool (II) is hollow and provided with a thread (1b) on the outer circumference to form an expansion mechanism (2). A nut (5) connected to the fluted disc (6) is screwed onto the thread (1b), said nut (5) being displaceable in the axial direction of the axis of rotation of the drive shaft (1) as a result of the rotation of the drive shaft (1). Between the connection of the drive shaft to the gearbox (Ib) to the output shaft (4) and the nut (5) with a fluted disc (6), a freely rotating disc (7) is inserted onto the drive shaft (1), which disc has a smooth surface and is secured against displacement in the axial direction of the axis of rotation of the drive shaft (1). An end stud (8) is screwed in the end portion of the drive shaft (1) with an element allowing the cleaving thread cone to be repeatedly connected and disconnected. A telescopic coil spring (12) is inserted between the nut (5) with the fluted disc (6) and the end stud (8) of the drive shaft (1), the telescopic coil spring (12) moving the nut (5) with the fluted disc (6) back to its starting position while serving as a cover of the thread (1b) on the drive shaft (1).

Description

technical field [0001] The present invention relates to a portable log splitter for splitting wood, in particular for splitting tree trunk parts. Background technique [0002] It is known that one of the methods for splitting logs (usually one meter long) is based on the principle of using a rotating threaded cone, which can easily penetrate into the log due to the threads on its circumferential sleeve, turning the log Divide into two pieces while separating the split wood pieces due to their wedge shape. Such a device is known from various versions of the background art. Typically, they are used in firewood processing for splitting logs several meters long. They consist of a power unit and one or two rotating splitting thread cones. Such portable devices are known, for example, from German patent application DE3425439, US patent No. US4491164, German utility model DE29616566 or international patent application PCT WO2015097571. [0003] From German patent application DE...

AI Technical Summary

Problems solved by technology

Another problem is that currently known portable log splitters are very large in size, requiring a lot of storage space, for example when they need to be transported in the trunk of a car (car trunk)

[0009] In addition, the common disadvantage of all the above-mentioned devices is that they are very complex in design and therefore expensive

Also, as portable log splitters, they are very heavy and cumbersome to carry, which prevents them from being used more effectively in practice

Another major disadvantage is that the operation of these devices is not ergonomic for the operator

A practical disadvantage of absolute importance is that these devices cannot separate split pieces of logs to a distance greater than the diameter of the threaded tapered base

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