US2359677A - Device for removing elements from shafts - Google Patents

Description

' Oct. 3, 1944. A E I 2,359,677

DEVICES FOR REMovIfiG ELEMENTS FROM SHAFTS Filed May 25, 1942 R EVEE F1551. 1510, TIE-1H; ATTUFWEYE I Patented Oct. 3, 1944 DEVICE FOR REMOVING ELEMENTS FROM SHAFTS Arthur Reeves, Halet, Quebec, Canada Application'May 2'5, 1942, Serial No. 444,297

1 Claim.

This invention relates to 'a device for removing elements from shafts and in particular the removal of detachable bits from the drill shaft or rod.

The invention will be illustrated with particular reference to the removal of detachable drill bits.

Detachable drill bit have been employed in mining operations, rock drilling and the like during recent years to an increasing extent and one difiiculty particularly encountered has been "the removal of the drill bits for resharpening -.or replacement. Normally, "detachable drill -hits are fitted very tightly on the drill shaft and during use sometimes become jammed on the shaft, even in those cases where an extremely tight fit is not made. To remove these bits make-shift methods are often employed which take up considerable time and which often necessitate that the shaft and attached bit he sent out to a machine shop for removal.

It is the object of the present invention to avoid the disadvantages of the prior art and to'provide a, simple and inexpensive apparatus through which elements including detachable drill bits may be removed fromshafts.

A further object of the invention is to provide an apparatus of this kind which is compact and which may be transported very readily.

With these and other objects in view, the invention generally comprises a combination including a base, a superstructure rising above the base and means cooperating with the superstructure for clamping a shaft on the base with the detachable drill .bit or element disposed clear of and spaced from the base and means for engaging the element, movable substantially in the axial direction of the shaft, for removing the element therefrom by percussion. Preferably the construction includes a pair of spaced apart side plates rising from the base with a wedge member designed to pass through the side plates to wedge the shaft in position.

The invention will clearly be understood by reference to the following detailed specification taken in conjunction with the accompanying drawing.

In the drawing:

Fig. 1 is a perspective view of the preferred form of device according to the present invention, showing a. drill rod shank clamped in position and a removable tool positioned in contact with the detachable bit ready for removal.

Fig. 2 is a longitudinal section taken through Fig. 1.

Fig. 3 is a transverse section taken through the device adjacent to the point where the wedge passes through the structure.

Figs. 4 and 5 are transverse sections similar to Fig. 3 but illustrating the use of a shim in conjunction with the drill rod or shaft, thecross section of which in Fig. .5 is different from Fig. 4.

Figs. 6 and 7 are perspective views of shims which might be employed and which are illustrated in Figs. 4 and '5.

Fig. 8 is a transverse section on the line 8-8 of Fig. 2; and I Fig. 9 is a perspective view of a convenient form of tool used in combination with the device.

Figs. 10 and 11 are different forms of prong engaging ends which may be used in a tool disclosed in Fig. 9.

Referring to the drawing:

A indicates a device for removing-elements from shafts. B indicates a shaft and C an element (a detachable drill bit) mounted on the shaft. The device A in the preferred form includes a base I0 which may be provided with a secondary base plate II having mounted thereon a shaft supporting base or block I2. The block I2 is of a thickness so that its upper surfaceis vertically spaced from the base III to a fairly substantial degree. On each side of the block I2 a pair of plates l3 and I 4 are mounted from the base plate I I, the plates I3 and I4 preferably being of angle iron having the horizontal flanges I5 so that they may be supported from the base plate in a simple and substantial manner. The plates I3 and I4 are designed preferably to abut the sides of the block I2 and are therefore in spaced apart relation to form therebetween a channel I6.

The plates I3 and I4 are formed with registering orifices I1 and I8 designed to receive therethrough a wedge member I9, the size and disposition of the orifices I1 and I8 are such as to cooperate with the wedge IS in a practical manner so that the wedge may be caused to exert a downward pressure when driven through the orifices.

These orifices are spaced upwardly from the upper surface of the block I2 a predetermined distance so that a shaft, drill rod or shank B may be disposed to lie upon or against the exposed surface of the block I2 and upon driving the wedge I6 through the orifices I1 and I8, such member B i firmly clamped on the {block I2 in frictional engagement with the latter throughout its extent. In the case of a drill rod such as illustrated in Figs. 1 and 2, the rod is so clamped that the detachable drill bit C is spaced from the base, both vertically and horizontally so that such detachable bit is freely disposed in relation to other parts of the device.

The channel l6 .provides a guideway through which a suitable tool D may pass to engage the protruding parts of the element to be removed from the shaft and the channel is such as to permit movement of the tool substantially in the axial direction of the shaft rod or shank to cause the element carried thereon to move axially and out of engagementfltherewith."

One suitable type of too1 D is includes the spaced apart prongs 2B and 2| offillustrated which set as at 22 from the plane of the shank 23, the 1 latter having an enlarged end 24 which may be readily struck with a maul, sledge or the like. The device is such that the enlarged end 24 of the tool protrudes rearwardly from the channel l6 and permits the free action of a sledge, maul or the like for subjecting the end to percussive contact such that the element maybe removed quickly by percussion.

The base I preferably extends, in advanceof the block l2 and side plates 13 and M, as at 25 and terminates in astop plate or baflle 26 so that in the case of smaller articles, particularly the lattenthey are caught by the stop plate 26 and base extension 25 when forcibly removed from the shaft B so that. they are held near the device and therefore maybe quickly retrieved. Thus, rods,

shafts or the like may be clamped in. the device and elements removed therefrom in relatively quick succession. If desired, more than one pair of orifices such as l! and i8 may be employed andspaced apart along the length of the side plates so that small lengths of shafting, etc. may be handled.

The base preferably has a ll-shaped extension 21 projecting from the end opposite to the stop plate 26 and preferably the wedge l9 and the tool D are connected with the device by means of flexible elements such as the chains 28 and 29. Thus, the device is made into one complete compact unit.

In the case of the removal of pulleys, wheels, etc., 'from axles or shafts, this device is readily employed but to avoidany possible damage to the axle 1 preferably employ as indicated at 30 and 3! (Figs. 4 and 5) a shim which will suit the cross section of the shaft involved and which will cooperate with the wedge i9 to clamp the shaft in the device without injuring the shaft in anyway.

The operation of the device is, of course, very simple. In terms of the removal of a detachable drill bit the drill rod is disposed in the channel I6 to lie upon the exposed Surface of the block [2. The wedge is then quickly inserted through the orifices I! and, I8 and driven therethrough so as to tightly clamp the rod upon the block I2. The rod, of course, is initially placed on the block I 2 so that the detachable drill bit C will project infspaced relation' fromi the end of the block 12 and, of course; in spaced relation to the base It]. By inserting the tool B in the channel l6 and engaging its forked ends with the shoulder of the detachable drill bit, the latter will be readily removed from the shaft upon subjecting the end of the tool D to percussion. The drill bit in flying off the rod B will hit the stop plate 26 and in the majority of cases will lie ready to hand to be picked up and disposed in a suitable box or the like.

The rod B is easily removed by striking the opposite end of the wedge whereupon a new rod may be quickly inserted in its place and the same procedure followed.

, The apparatus may, of course, be disposed horizontally or can be disposed vertically and in the latter case, if desired, the stop plate 26 may be used as a supporting medium for the device which, as willreadily be appreciatedconstitutes a simple compact unit which may be constructed economically, is comparatively light in'Weight and may readily be transported if desired.

What I claim as my invention is:

A device for holding shafts or the like comprising a base, a 'pair of parallel plates rising from the base forming therebetween a passageway in which to receive a shaft or the like, a block connected with said base and rising between saidparallel members to receive a substantial portion of said shaft: in'bearing engagement, said block being of a length less than the length of the base and being designed to space the shaft from engagement withthe base, the latter extending beyond said parallel members and said block, a pressure applying member designed to engage said shaft above said block, clamping means projectable through said plates and engageable with said pressure applyin member to forcibly clamp said shaft on said block in said passageway.

' I ARTHUR REEVES.

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