US1777305A - Cushioning device for rock drills - Google Patents
Cushioning device for rock drills Download PDFInfo
- Publication number
- US1777305A US1777305A US259898A US25989828A US1777305A US 1777305 A US1777305 A US 1777305A US 259898 A US259898 A US 259898A US 25989828 A US25989828 A US 25989828A US 1777305 A US1777305 A US 1777305A
- Authority
- US
- United States
- Prior art keywords
- buffers
- side bolts
- cushioning device
- sleeves
- bolts
- 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
Links
- 239000011435 rock Substances 0.000 title description 7
- 239000000872 buffer Substances 0.000 description 15
- 238000006073 displacement reaction Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
- B25D17/24—Damping the reaction force
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
- F16B2200/50—Flanged connections
- F16B2200/506—Flanged connections bolted or riveted
Definitions
- This invention relates to rock drills, but more particularly to a cushioning device for the side bolts employed for holding the casing parts of the drill together.
- the objects of the invention are to prevent breakage of the side bolts and to enable the cushioning means to render service for an extended period of time, thus preventing the necessity of frequently disassembling the drill for the purpose of replacing the same.
- Figure l is a. longitudinal plan view partly in section of a rock drill equipped with a cushioning device constructed in accordance with the practice of the invention
- Figure 2 is a transverse view taken through Figure l on the line 2 2 looking in the direction indicated by the arrows, and
- Figure 3 is a sectional elevation of amodilied form ef the invention.
- A designates a cylinder of a rock drill having back and front heads B and C respectively which are clamped to the Cylinder by means of side bolts D.
- the heads E of the 30 side bolts D are seated on flanges F of the back head and the forward portions of the side bolts D extend through apertures G of Hanges H formed integrally with the front head C.
- means are provided for protecting the side bolts D against the edects of shock incident to drilling, as for instance, when the force of the blow of the hammer piston (not shown) is delivered to the front head and associated parts instead of to the working iinplement J as sometimes occurs Whenever the working implement is projected out of the range of the hammer piston.
- rubber buffers K are disposed on the side bolts D and are interposed between the flanges H and nuts L threaded on the front ends of the side bolts for clamping the casing parts together as well as for applying the 1928. ⁇ Serial No. 259,898.
- the buders Khave central bores O to receive theside bolts D and in the peripheries of the burmiers are fformed longitudinal grooves P to permit of displacement of the buffers in a'lateral direction.
- Suitable means are provided for limiting the degree of :displacement of 'the buffers.
- the buffers areencased in cupsliaped sleeves Q, which are preferably formed as separate elements instead of as integral parts of the front head.
- the front end yof the sleevesiproject beyond the correspending ends ofthe buders Kto receive ⁇ washers R 'which form seats for the front endsfof thefbulfers K.
- the outer peripheries Sotthewasherslt cooperate slidably with the inner wallsof the sleeves Qto maintain thelsleeves Q in concentric position don the side'bolts D.
- a butler V is provided with a series of annular grooves lV to permit of displacement of the buffer V in a lateral direction whenever the front head C is subjected to the blows of the percussive element, such as a hammer piston.
- the sleeve Q which acts as a casing for the buffer V is like that illustrated in the preferred modification.
- the sleeves Q are first disposed on the side bolts D and the buffers K may then be inserted in the sleeves. Thereafter the washers R may be placed in position to abut the forward ends of the bulfers and the nuts L are threaded on the side bolts to clamp the casing parts, such as the cylinder and the front and back heads, firmly together and also to apply the desired pressure to the buffers K.
- the present invention has been found to function in an unusually eflicient manner and to render service for an extended period of time Without necessitating frequentdisassembling of the rock drill for the purpose of replacing ⁇ broken cushioning means, such as springs which have heretofore been employed for this purpose.
- a cushioning device or rock drills the combination of a cylinder and a front head, fianges on the front head, side bolts extending through the ianges for securing the front head to the cylinder, nuts on the side bolts, tubular buffer members mounted directly on each side bolt between the flanges and nuts, said buffers having longitudinal grooves in their peripheries to render them yieldable, cup-shaped sleeves encasing the buiifers to limit lateral displacement of the buffers, Walls at the rear ends of the sleeves having apertures to slidably receive the side bolts, and Washers on the side bolts slidable in the front ends of the sleeves for maintaining the sleeves in concentric position on the bolts.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Description
C. C. HANSEN CUSHIONING DEVICE FOR ROCK DRILLS Filed March '7, 1928 oct.l 7, 1930.
VEN TOR A TTORNEY lmllllllllii Charles S-Je): BMZ/QM- H15 eg i 7b FQ k,
Patented @et 7, 1933@ a STATES 'PArem` foFiFi-fce COMPANY, OF JERSEY CITY,
NEW JERSEY, A CORPORATIO'NOFNEWJERSEY CUSHION ING DEVICE .FOR VROCK `IDRILLS Application filed March 7,
This invention relates to rock drills, but more particularly to a cushioning device for the side bolts employed for holding the casing parts of the drill together.
The objects of the invention are to prevent breakage of the side bolts and to enable the cushioning means to render service for an extended period of time, thus preventing the necessity of frequently disassembling the drill for the purpose of replacing the same.
@ther objects will be in part obvious and in part pointed out hereinafter.
ln the accompanyingl drawings in which similar reference characters refer to similar parts,
Figure l is a. longitudinal plan view partly in section of a rock drill equipped with a cushioning device constructed in accordance with the practice of the invention,
Figure 2 is a transverse view taken through Figure l on the line 2 2 looking in the direction indicated by the arrows, and
Figure 3 is a sectional elevation of amodilied form ef the invention. Y
Referring more particularly to the drawings, A designates a cylinder of a rock drill having back and front heads B and C respectively which are clamped to the Cylinder by means of side bolts D. The heads E of the 30 side bolts D are seated on flanges F of the back head and the forward portions of the side bolts D extend through apertures G of Hanges H formed integrally with the front head C.
In accordance with the present invention, means are provided for protecting the side bolts D against the edects of shock incident to drilling, as for instance, when the force of the blow of the hammer piston (not shown) is delivered to the front head and associated parts instead of to the working iinplement J as sometimes occurs Whenever the working implement is projected out of the range of the hammer piston. To this end rubber buffers K are disposed on the side bolts D and are interposed between the flanges H and nuts L threaded on the front ends of the side bolts for clamping the casing parts together as well as for applying the 1928. `Serial No. 259,898.
desired pressure on the cushioning means, such as the buffers K. s y
The buders Khave central bores O to receive theside bolts D and in the peripheries of the burmiers are fformed longitudinal grooves P to permit of displacement of the buffers in a'lateral direction.
Suitable means are provided for limiting the degree of :displacement of 'the buffers. To this end the buffers areencased in cupsliaped sleeves Q, which are preferably formed as separate elements instead of as integral parts of the front head. The front end yof the sleevesiproject beyond the correspending ends ofthe buders Kto receive `washers R 'which form seats for the front endsfof thefbulfers K. The outer peripheries Sotthewasherslt cooperate slidably with the inner wallsof the sleeves Qto maintain thelsleeves Q in concentric position don the side'bolts D. In'orderftofthus also maintain the rearward ends of 'the 'sleeves Q, said sleeves Eare provided with' end walls T in which are formed central apertures U'to'receive-slidably the side bolts D. In the assembled position, the end walls T occupy a position between the rearward ends of the buffers K and the flanges H of the front head.
In the modiiication illustrated in Figure 3, a butler V is provided with a series of annular grooves lV to permit of displacement of the buffer V in a lateral direction whenever the front head C is subjected to the blows of the percussive element, such as a hammer piston. The sleeve Q which acts as a casing for the buffer V is like that illustrated in the preferred modification.
In assembling the device on the rock drill, the sleeves Q are first disposed on the side bolts D and the buffers K may then be inserted in the sleeves. Thereafter the washers R may be placed in position to abut the forward ends of the bulfers and the nuts L are threaded on the side bolts to clamp the casing parts, such as the cylinder and the front and back heads, firmly together and also to apply the desired pressure to the buffers K.
During the operation of the drill, whenever the drill steel J occupies such a position as to permit the hammer piston to impact against the front head or associated parts the blow Will be absorbed by `the buffers K which, although being composed of rubber and are therefore incompressible, will expand in a lateral direction due to the grooves in their surfaces. This momentary transformation of the buffers will permit of limited relative longitudinal lmovement of the cylinder and the front head and will therefore protect the side bolts against the severe strains resulting from such blows.
In practice the present invention has been found to function in an unusually eflicient manner and to render service for an extended period of time Without necessitating frequentdisassembling of the rock drill for the purpose of replacing` broken cushioning means, such as springs which have heretofore been employed for this purpose.
I claim:
In a cushioning device or rock drills, the combination of a cylinder and a front head, fianges on the front head, side bolts extending through the ianges for securing the front head to the cylinder, nuts on the side bolts, tubular buffer members mounted directly on each side bolt between the flanges and nuts, said buffers having longitudinal grooves in their peripheries to render them yieldable, cup-shaped sleeves encasing the buiifers to limit lateral displacement of the buffers, Walls at the rear ends of the sleeves having apertures to slidably receive the side bolts, and Washers on the side bolts slidable in the front ends of the sleeves for maintaining the sleeves in concentric position on the bolts.
In testimony whereof I have signed this specification.
CHARLES C. HANSEN.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US259898A US1777305A (en) | 1928-03-07 | 1928-03-07 | Cushioning device for rock drills |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US259898A US1777305A (en) | 1928-03-07 | 1928-03-07 | Cushioning device for rock drills |
Publications (1)
Publication Number | Publication Date |
---|---|
US1777305A true US1777305A (en) | 1930-10-07 |
Family
ID=22986897
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US259898A Expired - Lifetime US1777305A (en) | 1928-03-07 | 1928-03-07 | Cushioning device for rock drills |
Country Status (1)
Country | Link |
---|---|
US (1) | US1777305A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1519056A2 (en) * | 2003-09-27 | 2005-03-30 | Atlas Copco Construction Tools GmbH | Mechanism for the connection of at least two machine parts on an impact tool |
WO2009143906A1 (en) * | 2008-05-26 | 2009-12-03 | Robert Bosch Gmbh | Hammer drill and/or chisel hammer |
GB2602360B (en) * | 2020-06-03 | 2023-08-09 | Snap On Incorporated | Insert for a power tool housing |
-
1928
- 1928-03-07 US US259898A patent/US1777305A/en not_active Expired - Lifetime
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1519056A2 (en) * | 2003-09-27 | 2005-03-30 | Atlas Copco Construction Tools GmbH | Mechanism for the connection of at least two machine parts on an impact tool |
EP1519056B1 (en) * | 2003-09-27 | 2010-10-20 | Atlas Copco Construction Tools GmbH | Mechanism for the connection of at least two machine parts on an impact tool |
WO2009143906A1 (en) * | 2008-05-26 | 2009-12-03 | Robert Bosch Gmbh | Hammer drill and/or chisel hammer |
US20110073339A1 (en) * | 2008-05-26 | 2011-03-31 | Immanuel Werner | Hammer drill and/or chisel hammer |
US8695723B2 (en) | 2008-05-26 | 2014-04-15 | Robert Bosch Gmbh | Hammer drill and/or chisel hammer |
GB2602360B (en) * | 2020-06-03 | 2023-08-09 | Snap On Incorporated | Insert for a power tool housing |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US1358486A (en) | Handle for percussive tools | |
US1777305A (en) | Cushioning device for rock drills | |
US2062817A (en) | Rock drill | |
US2830792A (en) | Collar for drill steels | |
US1902530A (en) | Handle for rock drills | |
US1573458A (en) | Cushion handle | |
US2440150A (en) | Compression member | |
EP0790881B1 (en) | Hydraulic breaking hammer | |
US1644030A (en) | Handle for rock drills | |
US1213970A (en) | Spike-holder for hammer-drills. | |
US1613399A (en) | Chisel retainer for riveting hammers | |
US2500038A (en) | Tool retainer for rock drills | |
US1592858A (en) | Side-bolt construction | |
US1414234A (en) | Drill-steel retainer | |
US1798257A (en) | Front head for rock drills | |
US458532A (en) | greek of renovo | |
US1711688A (en) | Drill and manual support therefor | |
US5377772A (en) | Drill string shock absorbers | |
US1547774A (en) | Handle for percussive tools | |
US1429808A (en) | Drill-steel retainer | |
RU2631463C1 (en) | Hydraulic hammer | |
DE2855284C2 (en) | Portable impact tool | |
US1888333A (en) | Handle for rock drills | |
US1156376A (en) | Shock-absorber. | |
US1632837A (en) | Steel retainer |