US2081922A

US2081922A - Rock drilling mechanism

Info

Publication number: US2081922A
Application number: US5442A
Authority: US
Inventors: Elmer G Gartin
Original assignee: Sullivan Machinery Co
Current assignee: Sullivan Machinery Co
Priority date: 1935-02-07
Filing date: 1935-02-07
Publication date: 1937-06-01
Anticipated expiration: 1954-06-01

Description

June 1, 1937. E. G. GARTIN ROCK DRILLING MECHANISM Fild Feb. '7, 1935 2 Sheets-Sheet l INVENTOR. .E'Zmer 6. aria'n. BY A) 4' W 1 A TTORNEY.

June 1, 1937. E. G. GARTIN nocx DRILLING MECHANISM Filed Feb. '7, 1935 2 Sheets-Sheet 2 Patented June 1, 1937 UNITED STATES ROCK DRILLING MECHANISM Elmer G. Gartin, Claremont, N. H., assignor to Sullivan Machinery Company, a corporation of Massachusetts Application February '7, 1935, Serial No. 5,442

18 Claims.

My invention relates to rock drilling mechanisms, and more particularly to rock drilling mechanisms of the type known as drifters.

An object of my invention is to provide an 5 improved rock drilling mechanism. Another object of my invention is to provide an improved rock drilling mechanism having improved drill feeding and guiding means. A further object of my invention is to provide an improved feeding and guiding means for a rock drill of the mounted drifter type, providing a very compact construction. Still another object of my invention is to provide a simple, inexpensive and efiicient rock drill feeding and guiding means for ad- 15 vancing the drill toward the work and retracting it therefrom under the control of a drill runner. Other objects and advantages of my invention will hereinafter more fully appear.

In the accompanying drawings in which two embodiments of the invention are shown for purposes of illustration,

Fig. 1 is a view in side elevation of a drilling mechanism constructed in accordance with the preferred embodiment of the invention;

Fig. 2 is a rear end view of the drilling mechanism shown in Fig. 1;

Fig. 3 is a view in longitudinal vertical section, on the plane of the section line 3-3 of Fig. 4, through the feeding mechanism of the apparatus 30 shown in Fig. 1, but illustrates the drill proper largely in elevation;

Fig. 4 is a vertical section on the plane of the section line 4-4 of Fig. 3;

Fig. 5 is a vertical transverse section on the plane of the line 5-5 of Fig. 3;

Fig. 6 is a fragmentary sectional view through the control valve mechanism taken on a plane corresponding to the line 9-6 of Fig. 4;

Fig. '7 is a view similar to Fig. 3, showing an- 40 other illustrative embodiment of the invention;

Fig. 8 is an end view of the structure shown in Fig. 7;

Fig. 9 is a vertical section on the plane of the section line 9-9 of Fig. '7;

Fig. 10 is a transverse vertical sectional view on the plane of the line Ill-l9 of Fig. 7.

Referring to the drawings and first to Figs. 1 to 6 thereof, it will be noted that a rock drilling motor I adapted for the actuation of a usual 50 drill steel 2, is supported for guided feeding movements by a feeding and guiding mechanism generally designated 3. The feeding and guiding mechanism 3 is supported by a trunnion 4 which provides a pair of upstanding spaced ear por- 55 tions 5, between which there is received the depending narrow rib portion 6 of a feed cylinder structure generally designated i. The rib 6 is transversed by a series of holes 8 through which, and through corresponding holes 9, 9 in the ears 5, holding bolts [0 are inserted to permit the disposition of the feed cylinder and its supported parts in different longitudinal relative positions with respect to the trunnion 4. Feed cylinder 1 includes the hollow body portion ll providing a bore l2 and rigidly attached as by welding or the like to the rib 8, a rear head I3 and a forward head I4, the latter traversed by a suitable opening l5 for the passage of a piston rod. Within the cylinder there is reciprocable a piston I! provided with oppositely facing cup leathers l8 and suitably attached as at H! to a piston rod 29. The piston rod is traversed by suitable longitudinal passages 2| and 22, later again referred to, and respectively opening at 23 at the forward side of the piston and at 24 at the rear side thereof. A suitable guide and drill support structure generally designated 25 and cylindrical in outline except for the fact that it is slotted, as at 26, longitudinally to provide a narrow slot having walls 21 and 28 spaced sufficiently to receive between them the upmost portions of the ears 5, surrounds and slides upon the exterior of the cylinder member 1. This guide structure is provided with a rigidly connected forward head 39 in which is secured at 3| the front end of the piston rod 2|. Upon the top of the member 25 there is provided as at 33 a seat 34 upon which by suitable clamp devices 35 there is rigidly clamped a base portion 36 secured to the drilling motor I. Within the rear head 31 of the drilling motor is arranged a valve chest 38 in which a valve 39 is rotatably supported. This valve is hollow as at 49 and receives motive fluid from a fluid-conducting member 4|. The valve is traversed by a pair of fluid supply ports 42, 43, passage 42 terminating in a circumferential groove 44 of substantial extent to permit. adjustment of the valve 39 through a relatively wide angle to control motive fluid supply to the drill in a well-known manner through port means not shown, so that forward feed can be suitably maintained during controlled drilling motor operation. The valve is also provided with a pair of peripheral arcuate grooves 46 and 41 by means of which, in different positions of the valve, exhaust or vent

ports

48 and 49 may be selectively placed in communication with the

passages

59 and 5| which run downward into communication with longitudinally extending passages 52 and 53, which communicate respectively With the

passages

22 and 25 in the piston rod. The built-up construction at 33 provides with the head portion 38 adequate rigidity for the walls of the guide structure 25, but obviously peripheral ribs could be applied if greater stiffness were required.

The mode of operation of this device will be readily understood from the foregoing description. It will be noted that in the position of the parts shown in Figs. 2 and 3, the chamber 40 is supplying fluid through passage 43 and passages 53, and El and port 23 to the forward face of the feed piston, and therefore the drill is being moved in rearward direction. It will be noted, moreover, that when forward feed is desired the throttle valve 39 may be moved under the control of its operating handle H to bring the groove 44 into communication with the passage 59 and to bring the groove ill into communication with the passage 5!; then fluid will flow from the interior of the valve through '52, M, 58, 52, and 22 behind the feed piston, and will feed the latter and the guide structure 25 and the drilling motor I forward in an obvious manner, the drilling structure being maintained against lateral displacement, and with the drilling motor moving in alinement with the hole by the cooperation of the shoulders El, 28 with the tops of the ears 5. It will be evident that this structure is simple, and very compact, and that the drill may be fed forward a considerable distance while still fully supported and guided; and that the parts are inexpensive, durable and easily constructed.

Referring now to the construction shown in Figs. 7 to inclusive, it will be noted that in this casethe drilling motor 5 which actuates the drill steel 2 and which is controlled by a suitable throttle mechanism 39, of which the drill controlling portions are not illustrated in View of their well known nature, is mounted upon a supporting and guiding structure 56 which comprises an approximately cylindrical feed cylinder portion 55 and a portion 5% connected at 5'! to the portion 55. The portion 56 is relatively narrow and comprises a pair of gib portions 58 which cooperate with guides 59 formed integrally with and extending substantially throughout the full length of a cylindrical guide member 60. The throttle valve mechanism 39' corresponds substantially in construction with the controlling valve 39 of the first illustrative embodiment of the invention and controls the communication of vents 68, 49, and of fluid supply ports 45 and 43' with

passages

50, 5!. The

passages

50, 5| communicate with longitudinally extending passages GI, 62 formed in the portion 56 and communicate at their forward ends with upright passages (ill and 5 and the passages 64 and 63 respectively communicate through a longitudinal passage 65 and a radial passage 66 with the rear end of the bore of the feed cylinder 55 and through a longitudinal port 67 with the forward end of said feed cylinder. The feed cylinder 55 is provided with a bore 69 which receives a stationary feed piston 70 having suitable cup packings ll, l2 and mounted at the end of a piston rod 13. The piston rod 13 extends through a suitably packed opening "M in the rear head of the cylinder 55 and is connected to a head it: which is connected in any suitable manner, as shown by threads ll, to the guide Ell. The guide 69 is supported and suitably secured to a trunnion member Hi, there being provided in the member 60 a longitudinal slot 19, and in the trunnion member 18 in alinement with the slot :19 a longl tudinal opening 80 so that a depending key portion 8! formed upon the lower surface of the cylinder member 55 may be received and guided in the trunnion and in the slot 19. This key portion closely fitting the slot '19, and longitudinal opening 8U maintains the drilling motor in a uniform path of travel during feeding. The mode of operation of this devi e will be clearly apparent. It will be noted that in it the feed cylinder 55 slides inside the guide member Gil instead of the guide sliding upon the outside of the feed cylinder, as in the first illustrative embodiment. It will be observed that when fluid is admitted through the passage 35 and port 66 under the control of the throttle apparatus til, the pressure will act within the space to the right of the feed piston ill and cause the feed cylinder 55 and the drilling motor 5' to be retracted. When, however, fluid flows from groove M through passages til, 63 and port 6? into the space at the left-hand side of the feed piston ill, the drilling motor will be fed forward and effect a drilling operation.

With this form of construction also, it will be observed that a simple, effective, inexpensive feeding apparatus is provided, Well adapted for the functions it has to perform. 1

While there are in this application specifically described two forms which the invention may assume in practice, it will be understood that these forms of the same are shown for purposes of illustration and that the invention may be further modified and embodied in various other forms without departing from its spirit or the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is:

1. In a rock drilling apparatus, in combination, a rock drill, and pressure fluid operated feeding and retracting and guiding means for said drill comprising a single feed cylinder member, a piston therein, a cylindrical member having a longitudinal slot therein, said cylinder member providing a projection interfitting within said slot, and said piston and cylinder member being relatively reciprocable, and said cylinder member and cylindrical member being coaxial and relatively reciprocable with their adjacent arcuate surfaces in sliding, guiding contact, means for holding one of said members stationary, and a connection between the rock drill and the other of said members.

2. In a rock drilling apparatus, in combination, a rock drill, and feeding and guiding means for said drill comprising a pair of telescopically arranged cylindrical members having widely extended arcuate surface contact with each other and one having a projecting longitudinally extending guide portion and the other providing portions laterally engaging said projecting portion, one 01" said members constituting a double acting feed cylinder operative to effect selective feeding and retraction, means for holding one of said members stationary, and operative connections between the drill and the other of said members.

3. In a rock drilling apparatus, in combination, a rock drill, and feeding and guiding means for said drill comprising a single feed cylinder member, a piston therein, a cylindrical member having a longitudinal slot therein and of an internal diameter to fit in sliding relation with said cylinder member, said cylinder member providing a projection interfitting Within said slot, and said piston and cylinder member being relatively reciprocable, and said cylinder member and cylindrical member relatively reciprocable, means for holding one of said members stationary, and a connection between the rock drill and the other of said members, said rock drill disposed substantially wholly between the ends of said lastmentioned member.

4. In a rock drilling apparatus, in combination, a rock drill, and feeding and guiding means for said drill comprising a pair of telescopically arranged cylindrical members one having a projecting longitudinally extending guide portion and the other providing portions laterally engaging said projecting portion, one ofsaid members constituting a double acting feed cylinder operative to effect selective feeding and retraction, means for holding one of said members stationary, and operative connections between the drill and the other of said members, said drill disposed substantially wholly to the rear of the forward end of said last-mentioned member.

5. In a drilling apparatus, in combination, a drilling motor, a slotted cylindrical member connected to said drilling motor, a stationary feed cylinder in telescoping relation with said slotted cylindrical member and having a support extending through said slot, a piston in said feed cylinder, means for admitting feeding pressure selectively at opposite sides of said piston, and a piston rod connecting said piston with said slotted cylindrical member.

6. In a drilling apparatus, in combination, a drilling motor, a slotted cylindrical member connected to said drilling motor, said motor and cylindrical member arranged in laterally offset side by side relation, a stationary feed cylinder in telescoping relation with said slotted cylindrical member and having a support extending through said slot, a piston in said feed cylinder, means for admitting feeding pressure selectively at opposite sides of said piston, and a piston rod conmeeting said piston with said slotted cylindrical member.

'7. In a drilling apparatus, in combination, a drilling motor, a feed cylinder connected to said drilling motor, a stationary slotted cylindrical member in telescoping relation with said feed cylinder, said feed cylinder having a portion slidable within said slot, a piston in said feed cylinder, and a piston rod connecting said piston with said slotted cylindrical member.

8. In a drilling apparatus, in combination, a drilling motor, a feed cylinder connected to said drilling motor, said motor and cylinder arranged in laterally offset side by side relation, a stationary slotted cylindrical member in telescoping relation with said feed cylinder, said feed cylinder having a portion slidable within said slot, a piston in said feed cylinder, and a piston rod connecting said piston with said slotted cylindrical member.

9. In a drilling apparatus, in combination, a drilling motor, and feeding and guiding means for said motor including telescopically arranged members having thereon provision for precluding their relative rotation, one of said members being a feed cylinder, a feed piston in said feed cylinder member, means for supplying operating fluid selectively at opposite sides of said piston to effect feeding or retraction at will, a piston rod connecting said piston With the other of said members, means for holding one of said members stationary, and means for connecting the drilling motor to the other of said members.

10. In a drilling apparatus, in combination, a drilling motor, and feeding and guiding means for said motor including telescopically arranged members having thereon provision for precluding their relative rotation, one of said members being a feed cylinder, a feed piston in said feed cylinder member, a piston rod connecting said piston with the other of said members, means for supplying operating fluid selectively at opposite sides of said piston to effect feeding or retraction at will, said means including passage forming means in said piston rod, means for holding one of said members stationary, and means for connecting the drilling motor to the other of said members in laterally oifset side by side relation thereto.

11. In a drilling apparatus, in combination, a drilling motor, and feeding and guiding means for said motor including telescopically arranged members having provision for precluding their relative rotation, one of said members being a feed cylinder, a feed piston in said feed cylinder member, a piston rod connecting said piston with the other of said members, means for supplying operating fluid selectively at opposite sides of said piston to effect feeding or retraction at will, means for holding the feed cylinder member stationary, and means for connecting the drilling motor to the other of said members.

12. In a drilling apparatus, in combination, a drilling motor, and feeding and guiding means for said motor including telscopically arranged members having provision for precluding their relative rotation, one of said members being a feed cylinder, a feed piston in said feed cylinder member, a piston rod connecting said piston with the other of said members, means for supplying operating fluid selectively at opposite sides of said piston to effect feeding or retraction at will, said means including passage forming means in said piston rod, means for holding the feed cylinder member stationary, and means for connecting the drilling motor to the other of said members in laterally offset, side by side relation thereto.

13. In a drilling apparatus, in combination, a drilling motor, and feeding and. guiding means for said motor including telescopically arranged members having provision for precluding their relative rotation, one of said members being a feed cylinder, a feed piston in said feed cylinder member, a piston rod connecting said piston with the other of said members, means for holding said last mentioned member stationary, and means for connecting the drilling motor to the said feed cylinder member.

14. In a drilling apparatus, in combination, a drilling motor, and feeding and guiding means for said motor including telescopically arranged members having provision for precluding their relative rotation, one of said members being a feed cylinder, a feed piston in said feed cylinder member, a piston rod connecting said piston with the other of said members, means for holding said last mentioned member stationary, and means for connecting the drilling motor to the said feed cylinder member in laterally offset, side by side relation thereto.

15. In a rock drilling apparatus, in combination, a rock drill, and feeding and guiding means for said drill including a single feed cylinder member, a feed piston in said cylinder member, said cylinder member and feed piston being relatively reciprocable, a cylindrical member telescopically arranged in guiding relation with said feed cylinder member, said cylindrical member having a longitudinal slot therein, and a key portion on said cylinder member having a relatively slidable engagement with said slot for preventing relative rotation between said membars.

16. In a rock drilling apparatus, in combination, a rock drill, and feeding and guiding means for said drill including a feed cylinder member, a feed piston in said cylinder member, said cylinder member and feed piston being relatively reciprocable, a cylindrical member telescopically arranged in guiding relation with said feed cy1- inder member, said cylindrical member having a longitudinal slot therein, a key portion on said cylinder member having a relatively slidable engagement with said slot for preventing relative rotation between said members, said key and slot connection constituting the sole means for maintaining the parts against relative rotation, means for holding one of said members stationary, and a connection between the other of said members and the rock drill.

1'7. In a rock drilling apparatus, in combination, a rock drill, and feeding and guiding means for said drill comprising a cylinder member, a piston therein, a cylindrical member having a longitudinal slot therein, said piston and cylinder member being relatively reciprocable, a key portion on said cylinder member having a relatively slidable engagement with said slot, said cylinder member and cylindrical member being relatively reciprocable, means for holding one of said members stationary, a connection between the rock drill and the other of said members, and means including controlling valve means carried by said rock drill and passages leading therefrom to the spaces at the opposite sides of said piston for selectively efiecting feeding and retraction.

18. In a rock drilling apparatus, in combination, a rock drill, and feeding and guiding means for said drill comprising a pair of telescopically arranged cylindrical members one having a projecting longitudinally extending guide portion and the other providing portions laterally engaging said projecting portion, one of said members constituting a feed cylinder, a feed piston in said feed cylinder, operative connections between the other of said members and said feed piston, means for holding one of said members stationary, operative connections between the drill and the other of said members, and means including controlling valve means carried by said rock drill and passages leading therefrom to the spaces in the feed cylinder at the opposite sides of said feed piston for selectively efiecting feeding and retraction.

ELMER G. GARTIN.