US1954241A - Milling tool - Google Patents

Description

' April 10, 1934-y c. D. HELLYER 1,954,241l

MILLING TOOL Filed July 16, 1927 2 Sheets-Sheet l I N VE N TOR.

/5 C. D. HELLYER BY ATTORNEY.

April 1o, 1934.

c. D. HELLYER 1,954,241

MILLING TOOL Filed July 16. 1927 2 Sheets-Sheet 2 E Q. .En

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| 46 l /71l 47 I6 nl' 47 50 l Il IZ hi-E1 1/ INVENTOR. C D. HELLY R BY i . #9 ATTORNEY.

Patented Apr. 10, 1934 MLLING TOOL Clement D. Hellyer, Lo

E. Hellyer administratrix of estate of said Clement D. Hellyer, deceased s Angeles, Calif.; Fannie Application July 16, 1927, serial No. 206,178

3 Claims.

This invention relates to improvements in milling tools.

The general object of this invention is to provide an improved portable, all angle, self-centering milling tool' which is adapted for general work and which is particularly adapted for work on engine blocks to which it may be quickly attached or detached. l

Another object of the invention is `to provide an improved supporting and position locking means for ametal working device.

A further object of the invention is to provide an improved holding means for the rotatable spindle `of a cutting tool.

Other objects and advantages of this invention will be apparent from the following description taken in connection with the accompanying drawings wherein:

Fig. 1 is a side elevation of my improved milling tool showing it clamped to an engine block in a position to recondition one ofthe valve seats therein.

Fig. 2 is a top plan view oi my device showing it turned to another position relative to its supporting base.

Fig. 3 is a front end elevation of the device shown in Fig. 1.

Fig. 4 is a vertical section taken on line ,4-4 of Fig. 1. 4 i

Fig 5 is a vertical section taken on line 5-5 of Fig. 3, and

Fig. 6 is a section taken on line 6-6 of Fig. 5, showing the construction of the operating Wrench.

Referring to the drawings by reference characters I have indicated my improved tool generally at 10. Although the device is particularly adapted for use on engine blocks it will be understood that the device will operate with equal success `in various other capacities. My milling tool may be attached to any object or piece of work requiring milling, reaming, drilling, or any other class of operation requiring a rotatable spindle.

My tool `10 comprises a support 1l which includes a base 12 having a clamping bracket 13 mounted thereon and adapted to support a tool supporting arm 14 which is preferably circular in cross section as shown in the drawings.

Although in the following description I describe my device in a particular use it will be understood that the novel construction permits of many positions and adjustments which contribute to a wide scope of operations of a common nature whichr heretofore could` only be done by (Cl. Sil-12.5)

rious positions to clear any obstruction. This also allows a longer or shorter adjustment of the milling tool relative to the clamping point. The base 12 is provided with an upstanding boss.V 17 which has a conical recess 18 therein. The lowery part of the boss 17 has a screw threadedaperl-v ture `19 therein communicating with the bottomV of the conical recess 18. r

The bracket 13 includes a conical 18 in the base 12, and a sleeve 21 having a cylinf drical aperture 22 therethrough in which the tool supporting arm 14 is adapted to be positioned. The sleeve 2l is slitted along one side and provided With a pair of spaced lips 23 and 24, one on each side of the slit. r Y The lips 23 and 24 are each provided with an aperture 25 which is onthe same axis as an Vaperture 26 in the conical boss 20.

To clamp the bracket 13 in a xed relatio ship to the base 12 and to clamp the arm 14 in xed relationship to the bracket 13, I provide a clamping bolt 27. This clamping bolt 27 includes a shank 28 adapted to pass through the apertures 25 in the lips 23 and 24 and through the aperture 26 in the conical boss 20 (see Fig. 4). The shank 28 terminates at one end in a reduced threaded end portion 29 which engages the threaded aperture 19 in the boss 17 and at the opposite end in an enlarged head portion 30 which is adapted to engage the upper surface of the lip 23, when the clamping bolt is turned by the handle 30.

boss 20 (see "l Fig. 4) adapted to t within the conical recess 'lifts The arm 14 includes a swivel joint indicated generally at 31. This joint comprises a collar 32 integral with the arm 14 and a vspherical member 33 as shown in detail in Fig. 5. The collar 32 is slit on. one side as indicated at 34 to provide lips 35 .and 36.

The lips 35-and 36 are each provided with an tion of the bolt 38 engages a nut 39 while the shoulder formed at the juncture of the reduced end portion with the body of `the bolt is adapted 55 removing the motorblock from the frame of a to engage the lipY 35, thus upon a tightening of 110 l sitely extending collars 40 and 41.

the clamping bolt the lips and 36 will be drawn together and the ball member held in rigid relationship to the arm 14.

The ball member 33 is provided with oppo- An aperture 42 extends through the ball member 33 and the two collars and 41. The collar 40 is shown as provided with external screw threads for receiving a head 43. The head 43 may comprise a lower portion 43a and an upper portion 43b secured to the portion 43a by threads and a pin 43C. The head is shown as provided with an anti-friction bearing 44 and an aperture 45, part of the length of which is provided with screw threads as at 45' which match the screw threads on the collar 40 of the ball member 33. If desired the head parts 43a and 43b may be made integral and the ball race may be seated within the top part of the portion 43a.

In the accompanying drawings I have shown one form of tool holding'spindle 46 which includes a body portion 47 adapted for sliding movement through the aperture 42 in the ball member 33. The body portion 47, at one end, is

Iprovided with a reduced tapered portion 47 upon which a cutting tool such as indicated at 48 may be mounted, and a reduced end portion 49 which may serve as a guide when the device 10 is used for work on valves. Y 30 f Opposite to the tool holding end,`the spindle 46 is provided with a squared portion 50 land with an enlarged portion or collar at the juncture of the squared portion and the body portion 47 as indicated at 51. To position the spindle 46 Ain the device the head 43 is removed, the body portion 47 of the spindle positioned in the aperture 42 in the ball member 33 and the head 43 replaced, thus the collar 51 of the spindle Awhich is iirmly fastened to the spindle is in a position to engage one element of the ball race of the bearing 44 as shown in Fig. 5, and thus prevent upward movement of the spindle.

For rotating the spindle 46 I may provide a ratchet wrench 52 which includes a ratchet wheel 53 having a squared aperture therethrough which is adapted to engage the squared portion of the spindle as clearly seen in Fig. 6. A spring pressed dog 54 is adapted, when the wrench is moved in one direction, to move the lratchet wheel 53 in the same direction, thereby turning the spindle 46and upon a movement in the reverse direction to ride freelyv over the ratchet teeth, thus a reciprocating movement of the wrench 52 would rotate the spindle 46 in a single direction.

bolt 16 which may be inserted into any one of` the numerous tapped holes generally provided for securingthe' engine head to the block. 'If studs are used, in place of bolts', for retaining the head to the block, one of thestuds may pass through the elongated aperture l5 in the base 12 and the base clamped thereto by a nut.

After securing the base 12 to the engine block the head 43 is removed and the spindle 46 p0- 33. The arm 14 is then moved to a position over the valve seat 55 and the guide portion 49 of the spindle positioned in the guide hole 57 in the engine block. The swivel joint 31 and the movement of the arm 14 allow the guide 49 of the spindle 46 to be exactly centered in rela- Jtion to the valve seat, thereby assuring correct centeringof the tool 48 when it is operating upon the valve seat.

When the spindle 46 is correctly centered the clamping bolt 27 is tightened to clamp the bracket 13 in rigid relation to the base 12 and also to clamp the arm 14 in rigid relation to the bracket 13. The clamping bolt 88 is then tightened to secure the ball member 33 in rigid relation to the arm 14. After the various elements have been clamped together the spindle 46 is raised so that the guide portion 49 thereof clears the engine block and the tool 48 is then placed on the spindle and the spindle again lowered so that the tool contacts with the valve seat. The head 43 is then replaced and screwed down until the inner ball race of the bearing 44 abuts the collar 51 on the spindle. The engagement of the collar 51 against the ball race causes pressureto be applied to the spindle and the cutter 48.

The ratchet wrench 52 or other rotating means is next positioned on the squared end 50 of the spindle and moved to rotate the spindle, thereby causing the tool 48 to operate upon the valve seat. To feed the cutter 48 to the work the head 43 is rotated as slowly or quickly as desired.

With but one setting of my device 10, various operations may be performed upon the same valve seat, such as refacing and grinding, it being only necessary to withdraw the guide 49 from the engine block to remove the tool 48 on the spindle and replace it with another. Also when the base 12 is once clamped to the engine block the boring spindle may be moved to various positions as the spindle holding head may be swung about the pivotal point of the bracket cone 20 and the arm 14 may be moved within the aperture 22 of the bracket 13, thus affording a wide range of movement for positioning the spindle.

From the foregoing description it will be apparent that I have provided a novel form of portable milling tool which may beused for many purposes and which is simple in construction, easily operated and highly eiiicient in use.

Having thus described my invention, what I claim is:

1. In a device of the class described, a base, means to secure said base to a support, a bracket movable on said base, an arm supported by and movable on said bracket, a single means for clamping said bracket rigid on said base and for clamping said arm rigid on said bracket, a ball and socket joint on said arm and means to clamp the ball of said ball and socket joint rigid to said socket, an aperture in said ball, the axis of said aperture intersecting the axis of said arm, a head detachably secured to said ball, said head haidng an aperture therein, the axis of said head aperture being in alignment with the axis of the aperture in said ball member, a rotatable spindle passing through said head aperture and said ball member aperture, and means on said spindle for retaining a tool thereon.

2. In a device of the class described, a base, means to secure said base to a support, a boss on said base, said boss being offset to one side 0f` the axis of said securing means, said boss siticned` in the aperture 42 of the'ball memberhaving a recess therein, a bracket, said bracket including a hub positioned in said boss recess, said bracket having an aperture therein, the axis of said aperture being at right angles to the axis of said bracket hub and offset at one side of the axis of said hub, a tool holding arm, said arm being positioned in said bracket aperture and said arm being both longitudinally and rotatably movable in said aperture, means to simultaneously clamp said bracket rigid to said base and said tool holding arm rigid to said bracket, said tool holding arm having a ball and socket joint thereon, means to clamp the ball member of said ball and socket joint rigid t0 the socket member, said ball having an aperture therein, a member supported by said ball,

CLEMENT D. HELLYER.

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