US1753969A - Rock-cutting tool - Google Patents
Rock-cutting tool Download PDFInfo
- Publication number
- US1753969A US1753969A US381286A US38128629A US1753969A US 1753969 A US1753969 A US 1753969A US 381286 A US381286 A US 381286A US 38128629 A US38128629 A US 38128629A US 1753969 A US1753969 A US 1753969A
- Authority
- US
- United States
- Prior art keywords
- discs
- rotating
- cutting tool
- rock
- hammer
- 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.)
- Expired - Lifetime
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/18—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by milling, e.g. channelling by means of milling tools
- B28D1/181—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by milling, e.g. channelling by means of milling tools using cutters loosely mounted on a turning tool support
Definitions
- the present invention relates to tools for working in earth, rock, metal, wood and the like and more particularly to tools which comprise discs mounted on a rotating shaft 5 and having hammer heads in connection therewith.
- the hammer heads in rockcutting tools of this kind generally have a polygonal form and are pivoted with loose play on pins par- 10 allel with the axis of the rotating shaft.
- the object of the present 1 invention is to provide a rock cutting tool of the kind specified in which these strains on the supporting pins or trunnions for the hammer heads are reduced.
- connection between the pins and the rotating'discs carrying the same comprises annular elastic members, such as rubber discs or the like, said discs fitting tightly about the pins and being themselves fitted into suitable openings in the discs.
- I provide a hollow trunnion for the hammer head, said hollow trunnion being supported on a core pin by means of a suitable elastic member, such as a rubber sleeve or suitably shaped steel springs.
- Figs. 1 and 2 illustrate diagrammatically in cross sections and axial view a rotating tool of the kind referred to.
- the hammer pins are indicated by 1, the rotatmanner.
- Fig. 3 is an axial cross sectional View of a hammer pin in accordance with my invention.
- Fig. 4 is a section on the line IV'-IV of Fig. 3.
- Fig. 5 shows an axial section throu h a hammer trunnion in accordance with a modified form of the invention
- Fig. 6 is a cross section on the line VI-VI of Fig. 5.
- Fig. 7 is a sectional view, similar to Fig. 3 of a further embodiment of the invention, and Fig. 8 is a cross section on the line VIIIVIII of Fig. 7.
- Fig. 9 is 'a sectional View similar to Fig. 3 of a further embodiment of the invention, a nd Fig. 10' is a cross'section on the line X'X of Fig. 9'.
- the trunnion comprises a core pin 1 and a sleeve 2 of suitable wear resisting material fitted on to the same;
- the inside surface of the hammer head bears againstsl'eeve 2, the hammer head being not shown on the drawing.
- Pin 1 is mounted 'in the parallel rotating discs 3, 4 by means of annular elastic members 5, 6 of rubber or similar material, said discs 5, 6 being secured to the rotating discs 3, 4 by means of suitable cover plates 7, 8 riveted on to the'd'isc's 3, 4 or mother suitable
- the elastic rubber discs 5, 6 fit tightly about pin 1 and project a certain distance inside the inner circumference OiE the openings 9, 10 in 'discs 3, 4 adapted to receive the same, so that the pin 1 is given a certain freedom of movement in all directions in a is interposed between the trunnion sleeve 2 and the pin 1 an annular cushion 12 of rubber or the like, so as to permit the trunnion sleeve 2 freedom of movement against the elasticity of the cushion with regard to the pin 1, which in this case is mounted stationary in discs 3, 4.
- Figs. 9 and 10 The embodiment of the invention illustrated on Figs. 9 and 10 is similar to the one illustrated on Figs. 7 and 8, the only diiference being that slotted star-shaped steel springs 11 of the kind illustrated on Figs. 5 and 6 are substituted for the rubber cushion between trunnion sleeve 2 and pin 1.
- the invention is not limited to the use of any particular elastic means for giving the said freedom of movement to the hammer head trunnion, and although rubber cushions or steel springs are preferred, other means or elastic members formed by a combination of rubber and steel may be employed for the same purpose.
- a rotating rock cutting tool a rotating frame, a number of hammer heads, trunnions for rotatably connecting said hammer heads with said rotating frame and elastic means for connecting said trunnions with said rotating frame.
- a rotating rock cutting tool In a rotating rock cutting tool, a rotating frame, a number of hammer heads, trunnions for rotatably connecting said hammer heads with said rotating frame and elastic means comprising an annular body of rubber for connecting said trunnions with said rotating frame.
Description
April 8, 1930.
o. ROLFSEN ROCK CUTTING TOOL April 8, 1930. o. ROL FSEN 9 ROCK CUTTING TOOL Filed July 26, 1929 2 Sheets-Sheet 2 ll ll MJIEJIQ Patented Apr. 8,' 193!) ATE.
OLE ROLFSEN, OF KNIVSO, NEAR HALDEN, NORWAY ROCK-CUTTING TOOL Application filed my as, 1929. Serial no. 381,28'.
The present invention relates to tools for working in earth, rock, metal, wood and the like and more particularly to tools which comprise discs mounted on a rotating shaft 5 and having hammer heads in connection therewith.
The hammer heads in rockcutting tools of this kind generally have a polygonal form and are pivoted with loose play on pins par- 10 allel with the axis of the rotating shaft.
These pins owing to the jerky rotation of the hammer heads and the impacts of the hammer heads with the rock etc. are subjected to severe strains, and the object of the present 1 invention is to provide a rock cutting tool of the kind specified in which these strains on the supporting pins or trunnions for the hammer heads are reduced.
This is obtained in accordance with the 99 present invention by providing between the pin serving as a trunnion for the hammer head and the rotating discs carrying the said pins elastic members which permit a limited movement of the said pinsrelative to the discs in all directions in a plane perpendicular to the axis of the pins.
In accordance with a preferred embodiment of the invention the connection between the pins and the rotating'discs carrying the same comprises annular elastic members, such as rubber discs or the like, said discs fitting tightly about the pins and being themselves fitted into suitable openings in the discs.
Although it is preferred to use rubber discs for this purpose, it is also possible to substitute for these discs other elastic members such as steel springs or the like.
In accordance with another embodiment of my invention I provide a hollow trunnion for the hammer head, said hollow trunnion being supported on a core pin by means of a suitable elastic member, such as a rubber sleeve or suitably shaped steel springs.
Some embodiments of the invention are illustrated on the drawings.
Figs. 1 and 2 illustrate diagrammatically in cross sections and axial view a rotating tool of the kind referred to. On these figures the hammer pins are indicated by 1, the rotatmanner.
ing discs by 3, 4 and the hammer head's by 13.
Fig. 3 is an axial cross sectional View of a hammer pin in accordance with my invention. Fig. 4: is a section on the line IV'-IV of Fig. 3.
Fig. 5 shows an axial section throu h a hammer trunnion in accordance with a modified form of the invention, and Fig. 6 is a cross section on the line VI-VI of Fig. 5.
Fig. 7 is a sectional view, similar to Fig. 3 of a further embodiment of the invention, and Fig. 8 is a cross section on the line VIIIVIII of Fig. 7. Fig. 9 is 'a sectional View similar to Fig. 3 of a further embodiment of the invention, a nd Fig. 10' is a cross'section on the line X'X of Fig. 9'.
In accordance with the embodiment illustrated on Fig. 3, the trunnion comprises a core pin 1 and a sleeve 2 of suitable wear resisting material fitted on to the same; The inside surface of the hammer head, as will be understood, bears againstsl'eeve 2, the hammer head being not shown on the drawing.
It is preferred in connection with this embodiment of the invention to make the trunnion sleeve slotted so as to allow for expansions and contractions of the rubber cushion 12.
The embodiment of the invention illustrated on Figs. 9 and 10 is similar to the one illustrated on Figs. 7 and 8, the only diiference being that slotted star-shaped steel springs 11 of the kind illustrated on Figs. 5 and 6 are substituted for the rubber cushion between trunnion sleeve 2 and pin 1.
It will be observed that in all the embodiments of the invention above referred to, the trunnion, against the exterior surface of which the interior surface of the hole in the hammer head is bearing, is given freedom of movement against the elastic action of springs or the like with regard to the rotating discs 3, d carrying the hammer head pins.
The invention is not limited to the use of any particular elastic means for giving the said freedom of movement to the hammer head trunnion, and although rubber cushions or steel springs are preferred, other means or elastic members formed by a combination of rubber and steel may be employed for the same purpose.
Claims:
1. In a rotating rock cutting tool a rotating frame, a number of hammer heads, trunnions for rotatably connecting said hammer heads with said rotating frame and elastic means for connecting said trunnions with said rotating frame.
2. In a rotating rock cutting tool the combination with rotating hammer heads, trunnions for the said rotating hammer heads, a rotating frame member for supporting said trunnions and elastic means for connecting said trunnions with said rotating frame member.
In a rotating rock cutting tool, a rotating frame, a number of hammer heads, trunnions for rotatably connecting said hammer heads with said rotating frame and elastic means comprising an annular body of rubber for connecting said trunnions with said rotating frame.
In testimony wheref I aflix my signature.
OLE ROLFSEN.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US381286A US1753969A (en) | 1929-07-26 | 1929-07-26 | Rock-cutting tool |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US381286A US1753969A (en) | 1929-07-26 | 1929-07-26 | Rock-cutting tool |
Publications (1)
Publication Number | Publication Date |
---|---|
US1753969A true US1753969A (en) | 1930-04-08 |
Family
ID=23504442
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US381286A Expired - Lifetime US1753969A (en) | 1929-07-26 | 1929-07-26 | Rock-cutting tool |
Country Status (1)
Country | Link |
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US (1) | US1753969A (en) |
-
1929
- 1929-07-26 US US381286A patent/US1753969A/en not_active Expired - Lifetime
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