US2160274A - Portable power driven tool - Google Patents

Description

May 30 1939. N. A. LoPEz 2,160,274

PORTABLE POWER DRIVEN TOOL Filled OCl. 8, 1936 2 Sheets-Shea?l l fg i; a? E 4MM Maf May 30, 1939. N. A. LOPEZ PORTABLE POWER DRIVEN TOOL Filed Oct. 8, 1936 2 Sheets-Sheet 2 Patented May 30, 1939 UNITED STATES PATENT OFFICE Claims.

This invention relates to portable power driven tools such as drills, saws, grinders, polishers, and the like.

It is the principal purpose of this invention to 5 provide a tool supporting frame, such for example as a drill frame, having thereon a power translating mechanism and means for attaching a tool thereto, which frame has means for radially mounting and removing a motor to drive the tool.

In the use of portable tools of the character above referred to, it is not economical to employ a separate complete tool for each purpose because of the expense involved in providing motors and gears and power translating units for each tool such as a saw or a grinder or a drill.

In the present invention, I have provided a frame which is readily adapted to support a power translating mechanism, a tool chuck, a tool guide, and a work engaging member as a general as- 20 sembly. the frame being provided with means whereby a motor can be quickly attached to or detached from the frame. The tool guide and the work engaging member are removably mounted upon the frame which desirably is made up of a power translating unit and tool attaching chuck as one part with a handle and motor mounting section as another part.

'Ihe invention further contemplates certain novel improvements in the tool guide and work engaging mechanism which are particularly adapted to facilitate the application of such tools as drills to work of different shapes.

The features and advantages of the invention will become more apparent from the following description, reference being had to the accompanying drawings wherein a preferred form of the invention is shown. It is to be understood, however, that the drawings and description are i1- lustrative only and are not to be taken as limit- 40 ing the invention except in so far as it is limited by the claims.

In the drawings- Fig. l is a side view partly in section of a portable tool embodying the invention;

Fig. 2 is a side view taken substantially on the line 2 2 of Fig. l showing the tool guide and Work engaging member removed from the framework;

Fig. 3 is a sectional view substantially on the 50 line 3-3 of Fig. 2;

Fig. 4 is a sectional View on the line 4--4 of Fig. 2;

Fig. 5 is a sectional view on the line 5-5 of Fig. 1;

Fig. 6 is a fragmentary side view partly in section showing the parts in the upper portion of Fig. 1 in a changed position.

Fig. 7 is a side view showing the work engaging member turned at an angle to the axis of the drill.

Referring now in detail to the drawings, the invention is shown as applied to a portable drill structure although it is obvious that it is not limited to drills as many other types of tools may be just as readily used.

The device embodies a back frame member I0 which carries a power translating mechanism II secured on the back frame member I by means of screws I2. This power translating mechanism may comprise a speed reducing gear or other suitable mechanism such as the mechanism for changing the rotary motion of a motor to a reciprocating motion for saws or les and the like. The power translating unit II has a connecting shaft I3 provided with a socket to receive a shaft I4 of a motor I5, the connecting shaft I3 being provided with slots I6 to receive a pin I1 to establish a driving connection from the motor I5 to the power translating device II. In the form of the invention shown, the power translating device Il has a sleeve I8 through which a shaft I9 (see Fig. 3) projects to a chuck 2l] that is adapted to grip a work tool such as the drill 2|. A suitable thrust bearing 22 may be interposed between the chuck 2i! and the sleeve I3.

The motor I5 is readily detachable from the other mechanism. It is provided with a plate 23 secured by screws 24 to the motor housing. This plate has its side edges undercut as indicated at 25 and 26 and is slidable longitudinally in a groove 2'I provided in the back frame member IIJ. The plate 23 has a lip 28 at the rear end thereof which lip is adapted to seat against a shoulder 29 on the end of the back frame member I0 when the motor is pressed into driving position as shown in Fig. l. The back frame member IU has a longitudinally running rib 3i) thereon. An L-shaped handle piece SI has a portion 32 which is U-shaped in cross section adapted to embrace the rib 30. The portion 32 is pivoted to the rib 3l) by means of a pin 33. The rib 30 has an aperture 34, and the portion 32 of the handle 3| is apertured as indicated at 35 so that, when the portion 32 is pressed down on the rib 3Q in the position shown in Fig. l and Fig. 5, a lock pin 36 can be passed through the apertures 34 and 35 to lock the handle 3l in the position shown in Fig. 1. In this position, a shoulder 3l on the handle extends down behind the lip 28 on the plate 23 and across the groove 2T thereby locking the motor I5 firmly in operating position.

A tool guide and work supporting mechanism indicated generally by the numeral 38 is secured upon the sleeve I8. A block 39 carries a channel bar 49 which has its flanges 4I and 42 cut out as indicated at 43 and 44 (see Fig. 2) to receive the sleeve I8. A second channel bar 45 has its flanges 46 and 4I also cut out as indicated at 48 to receive the sleeve I8, The two bars 40 and 45 are clamped upon the sleeve I8 by screws 49 and 5G. The block 39, as shown, comprises a metal plate which is bent at the sides to provide a pair of spaced guides 5I and 52 adapted to slidably receive rods 53 and 54. The guides 5I and 52 are formed by bending the block 39 into substantially circular form at its opposite side edges. Near their lower edges, the portions 5! and 52 are provided with screws 55 to which springs 55 are secured, the upper ends of the springs 56 being secured to screws 5T in the rods 53 and 54. The springs 55 are under tension tending to pull the rods 53 and 54 downwardly as indicated in Fig. 1.

The rods 53 and 54 carry a plate 58 at their lower ends. This plate has a flat portion 59 extending toward the axis of the drill 2i and an upstanding rear portion 6D extending parallel to the axis of the drill 2|. A drill guide 6I is rotatably mounted on the top of the portion 29 by means of a pivot pin 82. A spring pressed pin 63 extends through the upstanding portion 60 of the plate 58 and engages notches 64 in the drill guide plate 6I to hold the drill guide in any adjusted position. The pin S3 has a collar 65 thereon. A coiled spring 66 is interposed between the collar and the portion E0 of the plate 58. A knurled handle (il is provided on the pin 53 in order that it may be drawn away from the notches 54 in the drill guide 6I. A work engaging member 68 is Secured to the plate 58. The work engaging member has a horizontally extending portion 69 and a mounting portion 'I9 extending up parallel to the portion 69 and guided thereby. The mounting portion 'i9 has a vertically running slot 1I. A screw 'F2 passes through the slot II and is threaded into the portion to secure the work engaging member in position against the plate 58. It will be noted that the slot 'II also extends down vertically around the pin 63 so that the pin 63 and the screw 'I2 together normally form a guide which prevents angular movement of the member 68 about the screw I2 as a pivot.

The member 68 can be raised and lowered, however, by sliding the screw 'I2 and the pin 63 vertically in the slot 'II. The slot II has a pair of curved portions 'I3 and 'I4 (see Fig. 2 and Fig. 7) which permit the member 68 to be turned at an angle to the axis of the drill about the screw 'I2 as a pivot when the member 68 is lowered to its lowered position. The slots 13 and 'I4 provide passages to receive the pin 63 in this position of the member E8.

For purposes of accurately setting the angle at which the member 68 is turned, a suitable scale of angles may be provided at l5 on the upstanding portion Ill of the member 68, The horizontal portion 69 of the member 68 is bent upwardly to provide V-shaped portions I5 and "Il, the upper extremities of which are on a line intersecting the axis of the drill 2! and running parallel to the upstanding portion 'i9 of the member 68. Between the portions 'I6 and TI, the member B8 is cut away to provide an opening large enough to permit the tool guide 6I to extend down between these portions. This is clearly indicated in Fig. 1. A shaft or angularly shaped piece of work can thus be positioned in the V-shaped portions 'l5 and 'I'I and held solidly during the drilling operation. The outer edges of the portions 'I6 and 'Il are bevelled as indicated at 'I8 and 'I9 on an angle of 45 degrees to the horizontal so that the member 68 can be fitted into a corner as illustrated in Fig. 2 to accurately position the drill for drilling holes in a corner.

Thus the single work engaging member 63 can be used for a great variety of work making it unnecessary to change from one work engaging member to another. 'I'he tool guide 5l cooperates with the work engaging member to accurately position the drill close to the work and thus avoid breakage of drills which might otherwise occur.

In the event that it is desired to use the portable tool frame consisting of the back frame member I9 and the handle 3| for a different type of work, the power translating device I I can be replaced with a different type such as a higher speed or lower speed with little or no diiculty. The motor I5, of course, can be very readily transferred from one frame to another making it unnecessary to have more than one motor for several tools.

From the above description, it is believed that the construction and operation or" this device will be readily apparent to those skilled in this art.

Having thus described one specific form of my invention, what I claim as new and desire to secure by Letters Patent is:

1. A tool supporting frame of the character described comprising a back frame member, means on said back frame member adapted to removably mount a motor, a power translating mechanism secured to said back frame member having a shaft provided with means to couple it with a motor shaft, a handle member movably connected to said back frame member, said handle member having means adapted in one position of the handle member to cooperate with the back frame member in securing a motor thereto, and means for locking said handle member in said last named position, said power translating mechanism having a tool receiving chuck thereon, and a tool guide frame fixed to said power translating mechanism and having guide means for the tool spaced from said chuck.

2. A tool supporting frame of the character described comprising a back frame member, means on said back frame member adapted to removably mount a motor, a power translating mechanism secured to said back frame member having a shaft provided with means to couple it with a motor shaft, a handle member movably connected to said back frame member, said handle member having means adapted in one position of the handle member to cooperate with the back frame member in securing a motor thereto, and means for locking said handle member in said last named position, said power translating mechanism having a tool receiving chuck thereon, and a tool guide frame xed to said power translating mechanism and having guide means for the tool spaced from said chuck, said tool guiding frame having a work engaging member adjustably mounted thereon.

3. A portabl-e tool supporting frame of the character describe-d comprising a back frame member, a tool holding chuck supported from said back frame member, connecting mechanism carried by said back plate for connecting a motor shaft in driving relation to said chuck, said back frame member having means to mount a motor thereon, and a handle member carried by the back frame member and having means to lock the motor in operative position on the back frame member, a tool guide frame carried by said back frame member, a Work engaging member carried by said last name-d frame, and a tool guide member carried by said last named frame, said Work engaging member being adjustable toward and away from the tool guide.

4. In a portable tool supporting frame of the character described, a tool guiding and Work engaging frame comprising a mounting block having means to secure it to the tool supporting frame, said block having means to slidably mount a pair of rods thereon, a pair of rods slidably mounted on said block, a tool guide fixed to said rods, said tool guide comprising a plate to which the ends of said rods are fixed, a rotatable tool guide pivoted on said plate, said plate having a turned-up portion extending parallel to said rods, said tool guide having peripheral notches, and a spring pressed lock pin extending through said turned-up portion to engage said notches.

5. In a portable tool supporting frame of the character described, a tool guiding and workengaging frame comprising a member having opposed clamping means adapted to receive a portion of the tool supporting frame therebetween, a rod slidably mounted in said member for movement toward and away from the tool supporting frame, a mounting plate fixed to said rod, a tool gui-de adjustably mounted on said plate on the side thereof toward the tool supporting frame, and a work-engaging member secured to said plate on the opposite side from the tool guide, said work-engaging member including a pair of V-shaped sections separated by an opening adapted to receive the tool guide, said V-shaped sections having their outside edges bevelled at an angle of 45 to the face of the Work-engaging member.

NICOLAS A. LOPEZ.

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