CA2069183A1 - Log-splitting tool - Google Patents

Log-splitting tool

Info

Publication number
CA2069183A1
CA2069183A1 CA 2069183 CA2069183A CA2069183A1 CA 2069183 A1 CA2069183 A1 CA 2069183A1 CA 2069183 CA2069183 CA 2069183 CA 2069183 A CA2069183 A CA 2069183A CA 2069183 A1 CA2069183 A1 CA 2069183A1
Authority
CA
Canada
Prior art keywords
tool
log
rear section
stub shaft
section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
CA 2069183
Other languages
French (fr)
Inventor
Benjamin Studer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CA 2069183 priority Critical patent/CA2069183A1/en
Publication of CA2069183A1 publication Critical patent/CA2069183A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27LREMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L7/00Arrangements for splitting wood
    • B27L7/02Arrangements for splitting wood using rotating members, e.g. rotating screws
    • B27L7/04Conical screws

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Earth Drilling (AREA)

Abstract

ABSTRACT OF THE DISCLOSURE:

Disclosed is a log-splitting tool in the form of a conical continuously threaded screw auger, comprising a front driving section which defines an outer conical threaded surface having a predetermined tapering angle, an intermediate section which defines an outer frustoconical threaded surface having a tapering angle smaller than the above-mentioned predetermined angle and a rear section which defines an outer frustoconical threaded surface having a tapering angle greater than this predetermined angle. The above angles may be, respectively, about 16°, 10° and 20°.
Also disclosed is a log-splitting machine which comprises a bench having a working table, a log-splitting tool of the type described above and a log-opener fixed to the table beneath the tool, rearwardly of the tool front section. The log-opener is formed of a vertical wall that extends axially of the tool and has a vertical pointed leading edge at one end and a pair of opening ears at the other end. Each of the ears projects laterally angularly from one side of the wall.

Description

2a~sls3 BACKGROUND OF THE INVENTION

Field of the invention:

The present invention relates to a tool for splitting wood logs and to a machine equipped with such a log-splitting tool.

Description of the prior_art:

It is of course well known that log splitting with an axe is a tedious and not very productive method.
Tools for splitting logs are known from U.S.
patents 4,027,709 of June 7, 1977 and 4,132,255 of January 2, 1979, both to THACKERY. They are conical augers with a straight outer surface removably mounted on a tractor and for that reason are not convenient where the tool has to be moved to several locations where a large number of logs have to be split. They are also made to be mounted solely on a tractor which is also a serious drawback. Finally, the threaded outer surface of the tool is a straight cone which is not the best surface for splitting a log, as is now better appreciated from the present invention.

SUMMARY OF THE INVENTION

A first object of the present invention is to provide a log-splitting tool having an outer threaded surface which is better adapted to and more efficient for log splitting.
Another object of the invention is to provide the said tool in combination, in a machine, with a log-opener intended to assist in the log-splitting operation and more particularly in ensuring that the split log parts fall on either side of the splitting tool.
Still a further object of the invention is to provide a log-splitting machine having a tool and opener of the above types and adapted to be entirely self-sufficient and capable of being easily moved from one location to another.
More specifically, the invention is a log-splitting tool in the form of a conical continuously lo threaded screw auger comprising a front driving section defining an outer conical threaded surface having a predetermined tapering angle, an intermediate section defining an outer frustoconical threaded surface having a tapering angle smaller than the predetermined angle and a rear section defining an outer frustoconical threaded surface having a tapering angle greater than the predetermined angle.
Preferably, the above angles are, respectively, about 16, 10 and 20~.
Conveniently, for mounting on a power driving assembly, the front and intermediate sect.ions of the tool are a solid conical body formed with a stub shaft projecting axially from its base and the rear section is a frustoconical body having a through bore. The stub shaft slidably fits into the bore from the small base of the rear section, and means are provided to secure the stub shaft into the bore against axial and rotational movement of the stub shaft relative to the rear section.
Broadly, a machine made according to the invention may comprise a bench having a working table, a log-splitting tool, as c].aimed in claim 1, mounted for rotation on the bench above the table and a log opener fixed to the table beneath the tool, rearwardly of the tool front section. The 2069~83 log opener comprises a vertical wall extending axially of the tool and having a vertical pointed leading edge at one end and a pair of opening ears at the other end, each of the ears projecting laterally angularly from one side of the wall.
A preferred embodiment of the invention will now be described in relation with the appended drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is an exploded perspective view of a log-splitting machine made according to the invention with the front part of the bench working table dropped for ease in illustrating the log-opener:
Figure 2 is a rear elevation view of the machine in Figure 1 and Figure 3, a side elevation;
Figure 4 is a side elevation view of the log-splitting tool; and Figure 5 is a side elevation view of the bench working table, shown partly in cross section.

DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to Figures 1, 2 and 3, the log-splitting machine 1 is seen to comprise a bench-shaped frame 3 defining an upper working table 5 supported by a frame structure having side legs 7, 9 the two legs 7 having free-rolling wheels 11 at their lower ends while the remaining two legs 9 have foot plates 13 for resting on the ground.
The machine can be moved by a pair of collapsible handles (Figure 2) pivoted at 17 below the working table 5 and having ends 19 projecting upwardly past the pivot 17 to butt against a stop block 21, mounted between bracket plates 23, when the handles 15 are shifted to horizontal position during displacement of ~he machine. A horizontal two-part support 25, 26 is mounted on the legs 7, 9 at the level of the wheels 11, between horizontal bars 27 of the bench 3.
Power is derived from an internal combustion engine 29 mounted on the support part 25. A belt tightener 31 is provided to adjust the position of the support part 25, in known fashion. Fixed to and across the working table 5 is a narrow bridge 33 over which are secured a bearing structure 35 and a log-opener 37. The bearing structure 35 supports a rotary log-splitting tool 39. It will be noted that the bridge 33 extends beyond the log-splitting tool 39 for the resting of a log 41, as shown in Figures 3 and 5. A belt power transmission 43 interconnects the engine 29 and the splitting tool 39 through the bearing structure 35. As can be seen, the machine is entirely autonomous and can quite conveniently and easily be moved from one site to another during the log-splitting operation.
Referring more particularly to Figures 1, 4 and 5, the log-splitting tool 39 is a conical continuously threaded screw auger that comprises a front driving section 45 defining an outer conical threaded surface having a tapering angle a, an intermediate section 47 defining an outer frustoconical threaded surface having a tapering angle b smaller than angle a and a rear section 49 defining an outer frustoconical surface having a tapering angle c greater than angle a. It has been found that the above conical configuration is very efficient for splitting logs. This is particularly so where angle _ is of about 16, angle b of about 10 and angle c of about 20. The driving section 45 should also preferably have 8 threads per inch and the remaining sections 47, 49 each 5 threads per inch. The threads should also preferably be of the buttress type, that 2~S9183 is with an essentially radial back face for developing greater power in entering a log.
Referring to Figures 1 and 5, the driving section 45 and the intermediate section 47 form a solid cone having 5 a stub shaft 51 projecting axially from it and the rear section 49 is a separate frustocone having a through bore 53 into which the shaft 51 slidably fits and is secured by ,appropriate means such as a key 55 lodged into facing grooves 56, 58 of the shaft 51 and of the section 49 to lo ensure their unison rotation. Relative axial movement is prevented by a setscrew 57 having a tip 59 fitting into a hole 61 of the key 55.
The log-splitting tool 39 is brought into rotation by an axle 62 rotatably mounted in the bearing structure 35.
15 One of its ends fits into the bore 53 of the tool rear section 49 and is held therein against relative rotation and axial movement by a key 65 fitting into a groove 67 and into the aforesaid groove 58, being further secured by a setscrew 69, all in the same manner as sections 47 and 49 of the tool 20 39.

The other end of the driving axle 63 fits into a through bore 71 of a flywheel 73 and into a hub 75 thereof, being fixed to them by a key 77 fitting into grooves 79, 80 and secured by washer and screw assembly 81. The aforesaid belt transmission 43 comprises a belt 83 wound around a pulley 85 of the flywheel 73 and a pulley 87 (Figure 2) of the internal combustion engine. The belt tightener 31 ensures proper tension in the belt 83 for appropriate 30 driving of the flywheel 73, the driving axle 63 and thereby the log-splitting tool 39.
The previously mentioned log-opener 37 (Figure 1), fixed to the bridge 33 beneath the log-splitting tool 39, 2~91~3 comprises a vertical wall 89 having a pointed leading edge 90 at one end and a pair of log opening ears 91 at the other end, each ear projecting laterally angularly from one side of the wall 89. It will be noted, from Figure 5, that the ears are located essentially beneath the rear section 49 of the tool 39. The log-opener 37 is intended, as will be gathered, to reject sideways the parts of the split log.
of course, numerous modifications can be made to the above machine without departing from the scope of the present invention as claimed hereinafter. Thus, by way of examples, the engine 29 used to power the machine needs not necessarily be an internal combustion engine. Similarly, the engine 29 needs not necessarily be mounted on a support part 25 beneath the table 5. As a matter of fact, the engine 29 could also be mounted on the table 5 itself, behind the flywheel 73.
The machine 1 may also comprises a wheeled frame rather than a bench-shaped frame 3, to make it haulable by a car or pick-up as a trailer on wood cutting sites.

Claims (19)

1. A log-splitting tool in the form of a conical, continuously threaded screw auger comprising: a front driving section defining an outer conical threaded surface having a predetermined tapering angle, an intermediate section defining an outer frustoconical threaded surface having a tapering angle and a rear section defining an outer frustoconical threaded surface having a tapering angle greater than said predetermined angle.
2. A tool as claimed in claim 1, wherein said predetermined angle is of about 16°, said tapering angle of said intermediate section is of about 10° and said tapering angle of said rear section is of about 20°.
3. A tool as claimed in claim 2, wherein said driving section has about 8 threads per inch and said intermediate section and said rear section have about 5 threads per inch.
4. A tool as claimed in claim l, wherein said front and intermediate sections of said tool are a solid conical body formed with a stub shaft projecting axially from the base thereof and said rear section is a frustoconical body having a through bore, said stub shaft slidably fitting into said bore from the small base of said rear section, and means securing said stub shaft into said bore against axial and rotational movement of said stub shaft relative to said rear section.
5. A tool as claimed in claim 3, wherein said front and intermediate sections of said tool are a solid conical body formed with a stub shaft projecting axially from the base thereof and said rear section is a frustoconical body having a through bore, said stub shaft slidably fitting into said bore from the small base of said rear section, and means securing said stub shaft into said bore against axial and rotational movement of said stub shaft relative to said rear section.
6. A log-splitting machine comprising:
- a frame defining a working table;
- a log-splitting tool as claimed in claim 1, mounted for rotation on said frame above said table; and - a log opener fixed to said table beneath said tool, rearwardly of said tool front section;
- wherein said log opener comprises a vertical wall extending axially of said tool and having a vertical pointed leading edge at one end and a pair of opening ears at the other end, each of said ears projecting laterally angularly from one side of said wall.
7. A machine as claimed in claim 6, wherein said front and intermediate sections of said tool are a solid conical body formed with a stub shaft projecting axially from the base thereof and said rear section is a frustoconical body having a through bore, said stub shaft slidably fitting into said bore from the small base of said rear section, and means securing said stub shaft into said bore against axial and rotational movement of said stub shaft relative to said rear section.
8. A machine as claimed in claim 7, wherein said predetermined angle is of about 16°, said tapering angle of said intermediate section is of about 10° and said tapering angle of said rear section is of about 20°.
9. A machine as claimed in claim 8, wherein said driving section has about 8 threads per inch and said intermediate section and said rear section have about 5 threads per inch.
10. A log-splitting machine comprising:
- a wheel-mounted frame adapted for displacement over the ground and having an upper working table;
- power means on said frame;
- bearing means on said table;
- a driving axle extending through said bearing means;
- power transmission means operatively inter-connecting one end of said driving axle to said power means for rotation of said driving axle;
- a log-splitting tool as claimed in claim l;
- means fixedly mounting the other end of said driving axle into said through bore of said rear section of said log-splitting tool from the large base thereof to allow rotation of said tool; and - a log opener fixed to said table beneath said tool, rearwardly of said tool front section;
- wherein said log opener comprises a vertical wall extending axially of said tool and having a vertical pointed leading edge at one end and a pair of opening ears at the other end, each of said ears projecting laterally angularly from one side of said wall.
11. A machine as claimed in claim 10, wherein said front and intermediate sections of said tool are a solid conical body formed with a stub shaft projecting axially from the base thereof and said rear section is a frustoconical body having a through bore, said stub shaft slidably fitting into said bore from the small base of said rear section, and means securing said stub shaft into said bore against axial and rotational movement of said stub shaft relative to said rear section.
12. A machine as claimed in claim 11, wherein said predetermined angle is of about 16°, said tapering angle of said intermediate section is of about 10° and said tapering angle of said rear section is of about 20°.
13. A machine as claimed in claim 12, wherein said driving section has about 8 threads per inch and said intermediate section and said rear section have about 5 threads per inch.
14. A machine as claimed in claim 6, wherein said opening ears are located essentially beneath said rear section of said log-splitting tool.
15. A machine as claimed in claim 12, wherein said opening ears are located essentially beneath said rear section of said log-splitting tool.
16. A machine as claimed in claim 6, further comprising a narrow bridge mounted on said working table, said log opener being fixed to said bridge and said bridge extending beyond said log-splitting tool for the resting thereon of logs to be split.
17. A machine as claimed in claim 16, wherein said front and intermediate sections of said tool are a solid conical body formed with a stub shaft projecting axially from the base thereof and said rear section is a frustoconical body having a through bore, said stub shaft slidably fitting into said bore from the small base of said rear section, and means securing said stub shaft into said bore against axial and rotational movement of said stub shaft relative to said rear section.
18. A machine as claimed in claim 10, further comprising a narrow bridge mounted on said working table, said log opener and said bearing means being fixed to said bridge and said bridge extending beyond said log-splitting tool for the resting thereon of logs to be split.
19. A machine as claimed in claim 18, wherein said front and intermediate sections of said tool are a solid conical body formed with a stub shaft projecting axially from the base thereof and said rear section is a frustoconical body having a through bore, said stub shaft slidably fitting into said bore from the small base of said rear section, and means securing said stub shaft into said bore against axial and rotational movement of said stub shaft relative to said rear section.
CA 2069183 1992-05-21 1992-05-21 Log-splitting tool Abandoned CA2069183A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA 2069183 CA2069183A1 (en) 1992-05-21 1992-05-21 Log-splitting tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA 2069183 CA2069183A1 (en) 1992-05-21 1992-05-21 Log-splitting tool

Publications (1)

Publication Number Publication Date
CA2069183A1 true CA2069183A1 (en) 1993-11-22

Family

ID=4149881

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2069183 Abandoned CA2069183A1 (en) 1992-05-21 1992-05-21 Log-splitting tool

Country Status (1)

Country Link
CA (1) CA2069183A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012042166A1 (en) * 2010-10-01 2012-04-05 ALONSO, Cédric Wood splitting machine
CN109968464A (en) * 2019-03-20 2019-07-05 合肥壹点通信息科技有限公司 A kind of hydraulic drive type firewood chopping device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012042166A1 (en) * 2010-10-01 2012-04-05 ALONSO, Cédric Wood splitting machine
FR2965504A1 (en) * 2010-10-01 2012-04-06 Alonso Cedric WOOD SCREWING MACHINE
CN109968464A (en) * 2019-03-20 2019-07-05 合肥壹点通信息科技有限公司 A kind of hydraulic drive type firewood chopping device

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Legal Events

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