US2020806A

US2020806A - Guide member for rock drills

Info

Publication number: US2020806A
Application number: US8809A
Authority: US
Inventors: Sr William A Smith
Original assignee: Ingersoll Rand Co
Current assignee: Ingersoll Rand Co
Priority date: 1935-03-01
Filing date: 1935-03-01
Publication date: 1935-11-12
Anticipated expiration: 1952-11-12

Description

Nov. 12, 1935. w. A. SMITH, SR 2,020,806

GUIDE MEMBER FOR ROCK DRILLS Filed March 1, 1935 J! .1. 22 E5 51 t 55 H I INVENTOR.

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HISAT ORNEK Patented Nov. 12, 1935 UNITED STATES PATENT OFFICE GUIDE MEMBER FOR ROCK DRILLS Application March 1, 1935, Serial No. 8,809

6 Claims.

This invention relates to rock drills, and more particularly to a guide member for rock drills of the type which are mounted slidably in supporting shells whereby they are held in correct relationship with respect to the work.

One object of the invention is to minimize the expense of maintenance of rock drills of this type by providing the rock drill with detachable guide ribs which may be replaced when Worn to a state of unserviceability without necessitating the additional and comparatively greater expense of replacing a casing part.

Another object is to equip the rock drill with a guide member that will remain secured rigidly in the assembled position on the rock drill.

Other objects will be in part obvious and in part pointed out hereinafter,

In the drawing accompanying this specification and in which similar reference numerals refer to similar parts,

Figure 1 is a longitudinal side elevation of a rock drill equipped with a guide member constructed in accordance with the practice of the invention, I

Figures 2, 3 and 4 are transverse views taken through Figure 1 on the lines 2-2, 33 and 4-4, respectively, and

Figure 5 is a transverse view taken through Figure 3 on the line. 55.

Referring more particularly to the drawing, 20 designates the guide member and 2| a rock drill to which the guide member is applied.

The rock drill 2|, of which only certain of the casing parts are shown for the sake of simplicity of illustration, comprises a cylinder 22 and front and

back heads

23 and 24, respectively, which may be secured to the cylinder by the usual side rods 25, only one of which is shown.

In accordance with the practice of the invention the cylinder 22 is provided with a base portion or rib 26 which extends longitudinally of the cylinder and preferably terminates at or near the ends thereof. The bottom of the base 26 is in the form of .a flat surface 21 which seats upon a similar surface 28 of the guide member 20, and in the

surfaces

21 and 28, which are of the same width, are

transverse registering slots

29 and 30 containing a key 3| which serves to hold the cylinder and the guide member against relative longitudinal movement.

In the transverse view the base 26 has the appearance of a dove-tail of which the side surfaces 32 incline generally in the direction of the axis of the cylinder. The adjacent portion 33 of the plate 22 is likewise of dove-tail shape although inverted. Its side surfaces 34, therefore, decline toward the axis of the plate and preferably have the same degree of inclination as the surfaces 32.

The

surfaces

32 and 34 preferably extend along the entire length of the base 26 and the plate 20 5 and serve as seating surfaces for clamping plates 35 arranged on opposite sides of the base 26. The clamping plates are provided with V-shaped grooves 36 to receive the portions of the base and the plate defined by the inclined surfaces.

In order to secure the clamping plates 35 fixedly in the assembled positions said plates and the base 26 and the portion 33 of the plate 2!! are provided with registering holes 3? for the reception of securing means illustrated as being in the form of rivets 38. Any suitable number of rivets may be employed for this purpose and as a preferred form of construction the outer ends of the portions of the holes 31 in the plates 35 are countersunk to permit of the ends 39 of the rivets being peined thereinto. The holes 31 are preferably so located that their longitudinal axes substantially coincide with the plane of the

surfaces

21 and 28. Thus, semi-circular slots 40 will be located in both the base 23 and the portion 33 2' and these slots register with each other to accommodate the intermediate body portions of the rivets 38. As will be readily understood, therefore/the rivets will be embedded equally in both the base 26 and the portion 33 of the plate 20 to augment the locking effect of the key 3|.

In the arrangement shown the key 3| is .arranged in the transverse plane of a rivet 38 which extends through the key. Thus, the 'clamping plates will overlie the ends of the key slots 29 35 and 30 to retain the key 3| therein.

The plate 20 is provided on its opposite sides with guide ribs 4| adapted to extend slidably into the guideways of a rock drill shell (not shown) and which may be of a well known type commonly 40 employed for guiding and maintaining the rock drill in the correct relationship with respect to the rock being drilled. The plate 26 is, moreover, provided at its rear end with a lug 42 to receive a feed nut 43 which is suitably threaded internally 45 for cooperation with a feed screw (not shown) but thereby the force is applied to the rock drill for actuating it longitudinally of its supporting shell.

In practice, the present invention has been 60 found to be highly efiicient and to effect a considerable economy in the matter of maintenance of the drilling apparatus. It is a well known fact that the guide portion, such as the ribs 4| of the present structure, are exposed to severe 1. In a guide member for rock drills, the cornbination of a rock drill casing and a plate having guide portions, clamp means extending longitudinally of and on opposite sides of the casing and the plate and engaging each, and means for' securing the clamp means fixedly to the casing and the plate.

2. In a guide member for rock drills, the combination of a rock drill casing and a plate having guide portions, inclined surfaces on opposite sides of the casing and the plate, clamp means engaging the inclined surfaces, and means for securing the clamp means fixedly to the casing and the plate.

3. In a guide member for rock drills, the combination of. a rock drill casing and a plate having guide portions, there being inclined surfaces on adjacent portions of the casing and the plate and extending longitudinally thereof, clamping plates engaging the inclined surfaces, and means seated in the casing and the plate'and engaging the clamping means for securing the clamping means fixedly to the casing and the plate.

4. In a guide member for rock drills, the combination of a rock drill casing and a plate hav- 5 ing guide portions, there being inclined surfaces on adjacent portions of the casing and the plate,

clamping plates having V-shaped grooves to receive the inclined surfaces, and rivets embedded in the adjacent surfaces of the casing and them plate and securing the clamping plates fixedly. to the inclined surfaces.

5. In a guide member for rock drills, the combination of a rock drill casing and a plate seat- 7 ing against the casing and having guide portions, 15

clamping means extending along opposite sides of the casing and the plate for clamping the casing and the plate together, and means inserted in the confronting surfaces of the casing and the plate to prevent relative longitudinal movement 20 therebetween.

6. In a guide member for rock drills, the combination of a rock drill casing and a plate having guide portions, a key inserted in the confronting surfaces of the casing and the plate, clamping 25. means for clamping the casing and the plate together and for retaining the key in the plate and the casing, and means for securing the clamping means fixedly in position.

WILLIAM A. SMITH, SR. 7 t?