Патент USA US2125133код для вставки
July 26, 1938. ‘ . E. F.' TERRY i 2,125,133 CLEANSING DEVICE‘ 'f'ok‘ ROCK‘ DRILLS 1 ' Filed April‘ 10. ‘1936 ' 55'. <77 “ INVENTOR ' BYW ’ H as ATTORNEY. 2,125,133 Patented July 26, 1938 UNITED STATES PATENT OFFICE 2,125,133 CLEANSING DEVICE FOR ROCK DRILLS Edward F. T‘erry; Phillipsburg, N. J., assignor to IngerSoll-Rand Company, Jersey City, N. J., a corporation of New Jersey ' Application April 10, 1936, Serial No. 73,674 1 Claim. (01. 121-10) This invention relates to cleansing devices, but ing its rearward stroke for rotating the working more particularly to a device for supplying cleans implement. ing liquid directly to the working implement of In accordance with the practice of the inven tion the chuck mechanism guiding the Working implement 29 comprises a sleeve 39 having a bore 40 to receive the shank of the working implement. In the front end of the sleeve 39 are threads 4| to engage threads 42 on the working implement for securing the two securely together. The rearward portion of the bore 49 is in body en 10 gagement with the adjacent portion of the work ing implement and, as a preferred form of con struction, the sleeve 39 is provided with an en larged recess 43 having ‘threads 44 for engage ment with threads 45 of a plug 46. The plug 15' preferably seats upon the bottom of the recess 43 and has a beveled surface 41 that cooperates a ?uid actuated rock drill. One object of the invention is to assure an adequate supply of cleansing liquid to a drill hole to flush the cuttings from the Working surface. Another object is to prevent the passage of pressure fluid from the rock drill into the drill 10 hole. Other objects will be in part obvious and in part pointed out hereinafter. In the accompanying drawing forming a part of this speci?cation and in which similar refer 15 ence numerals refer to similar parts, Figure 1 is a sectional elevation of so much of a rock drill as will serve to illustrate the inven tion and a practical application thereof, and Figure 2 is a transverse view taken through 20 Figure 1 on the line 2-2. Referring more particularly to the drawing, the rock drill embodying the invention and desig nated in its entirety by 20, comprises a cylinder 2!, a front head 22 and a hollow spacer 23 inter posed between the cylinder and the front head. These elements constitute casing parts of the rock drill and may be held securely in the cor rect assembled relationship with respect to each other by side rods 24 disposed on opposite sides 30 of the rock drill. The spacer 23 has an annular extension 25 that extends into the front head 22 to centralize these elements with respect to each other and is cen _ tralized with respect to the cylinder by a front cylinder washer 25 extending into the contigu ous ends of the cylinder and the spacer. A ?ange 2‘! on the periphery of the front cylinder washer acts as a seat for the ends of the cylinder and the spacer. 4.0 The cylinder 29 contains a hammer piston 28 for actuating a working implement 29 extending into the front head 22. The piston 28 has a stem 30 which is guided by the front cylinder washer 26 and has longitudinally extending ?utes 3| to receive and interlock slidably with ribs 32 in a sleeve 33 rotatable in the spacer 23. In the rear end of the cylinder 2| is arranged rotation mechanism of well known type com prising a ri?e bar 34 which interlockingly en; gages the piston 28. The ri?e bar has a head 35 and pawls 36 in the head 35 cooperate with the teeth 31 of a ratchet ring 38 for holding the ri?e bar against rotary movement and thus cause 55 the piston 28 to describe a partial revolution dur 1 with a corresponding surface 48 on the end of I the working implement 29 to effect a seal at that point. .. 20v The plug 46 carries a stem 49 which extends into the sleeve 33 and has ?utes 5D to receive the ribs 32 on the sleeve 33. The stem 49 is imperforate and projects into the path of the stem 30 to receive the blows of the piston and 25 transmit them to the working implement 29. In order that pressure ?uid ?owing along the stem 30 of the piston toward the front end of the drill may be prevented from entering the chuck mechanism the sleeve 33 is provided with 30 an aperture 5|, preferably adjacent the free end of the stem 49. The aperture 5| opens into an annular groove 52 in the periphery of the sleeve 33, and a vent 53 in the spacer 23 affords com munication between the groove 52 and the at 35 mosphere. Within the front head 22, and encircling the sleeve 39, is an annular chamber 54 into which cleansing ?uid is constantly delivered by a con duit 55 connected to the front head. The ends of the chamber 54 are sealed by packing members 56 which are pressed into sealing engagement with the periphery of the sleeve 39 by a spring 51 interposed between the packing members. In the periphery of the sleeve 39 is an annular 45 groove 58 which, when the chuck mechanism and the working implement are in their rearmost limiting positions to receive the blows of the ham mer piston 28, registers with the chamber 54, and from the annular groove 58 lead passages 59 which open into the front end of the recess 43. The block 49 is likewise provided with a series of passages 60 and. an axial passage 6| communicat ing with the passages 60 and with a passage 62 in the working implement 29. 55 2 2,125,133 Preferably, the annular groove 58 is so posi~ tioned that it opens into the chamber 54 near the front end of said chamber when the chuck member 56. In this way the groove 58 will be moved out of communication with the chamber 54 and no cleansing ?uid will, therefore, ?ow to mechanism lies in its rearmost limiting position. the ‘drill hole. Whenever it is again desired to The chuck mechanism is slidable within the front head and capable of a considerable degree of lon resume drilling the percussive element of the rock drill is set in operation and the working imple ment pressed against the work to move the chuck mechanism rearwardly in the front head. The passages in the working implement and the chuck mechanism will then again be communicated with 1O the source of liquid supply and without necessi tating the manipulation of valve means exteriorly of the rock drill, as is customary. I claim: gitudinal movement therein. Thus, when the rock drill is inoperative, the chuck mechanism may be moved forwardly to move the groove 58 out of communication with the chamber 54 and thereby cut off communication between the pas~ sage 62 in the working implement and the source of cleansing liquid supply. During the normal operation of the drill and when the working implement is pressed against the Work the chuck mechanism lies in its rear most limiting position so that the annular groove 58 will be in full communication with the cham ber 54. In this position of the parts cleansing ?uid flows from the chamber 54 through the groove 58 and the passages 59, 60, BI and 62 into the hole being drilled and ?ushes the cuttings to the surface of the ground. Cleansing ?uid con tinues to flow through these channels as long as 25 the chuck mechanism remains retracted so that In a rock drill, the combination of a casing and a working implement extending thereinto and having a passage for cleansing fluid, a hammer piston for actuating the working implement, a hollow rotary member in the casing having in ternal ribs in engagement with the piston, a ,, sleeve slidable in the casing and being threaded ly connected to the working implement, means threaded into the sleeve and seating against the end of the working implement for transmitting the blows of the hammer piston to the working 25 the stem 49 is in position to receive the blows of implement, an imperforate stem on said means the hammer piston 28. In the event, however, having ?utes to receive the ribs on the rotary that the drilling operation is interrupted, as member, and a supply passage in the sleeve and when changing working implements, the chuck the said means for conveying cleansing fluid to 30 mechanismis drawn forwardly in the front head, the passage in the working implement. 80 preferably to a position in which the annular groove 58 lies forwardly of the front packing EDWARD F. TERRY.