US1521356A - Mandrel press - Google Patents

Description

T. W. BURT MANDREL PRESS Dec; 30,` H924.

Filed May 25, 1922 Patented Dec. 3U, 1924.

UNITED STATES PATENT OFFICE. l

TOWNSEND W. BURT, OF HEMPSTEAD, NEW YORK.

MANDREL PRESS.

Application filed May 25,

n ments in Mandrel Presses, of which the following is a specification.

This invention relates to machines for removing gears, wheels and the like from their shafts, or for mounting` the same on their shafts.

One of the objects of this invention is to devise a machine which may be used for either of the above named purposes with a minimum amount of changing.

A further object of the invention is to construct a. mandrel press which is more simple and quicker to operate than the presses at present in use and at the same time of less cost.

Referring to the drawings in which what I now consider' the preferred form of my invention is shown;

Fig. 1 is a front elevation, partly in section of my preferred form of press.

Fig. 2 is a side elevation of the same. Fig. 3 1s a section on line 3-3 looking down with the work removed.

Fig. 4 is a detail showing the attachment for employing` the machine to place a gear upon a shaft.

Fig. 5 is a front elevation of a modified 1 form of removable foot rest.

My apparatus is shown as made up of a base 1 on which is hinged a hand operated lever 2 which may be forkedat the base so as to have two spaced ears 3 and 4, through which extend bolts 5 and 6 secured between pairs of upstanding ears 7 and 8-on the base. An open frame 9 is shown as hinged at 10 and 11 on said lever 2 at points comparatively close to the pivotal points of lever 2 so that a large leverage will be exerted to move saidframe 9 downwardly on rotation of the lever 2 in a clock-wise direction in Fig. 2. The frame 9 is shown as passing upwardly on each side of the work-holder or table 12. Said table is held in spaced relation to the base 1 as by means of a tube or hollow column 13. rfhe workholder at opposite sides thereof may be cut away to form opposite shoulders 15 and 16 to limit the angular movement of the frame 9 about pivots 10 and 11. If desired, an adjustable threaded stop 17 may be pro- 1922. Serial No. 563,610.

vided on one of the shoulders so that it may be positioned accurately to maintain the frame when in its forward position exact-ly vertical, i. e., directly over the work. The frame 9 is shown as extending above the work-holder 12 and provided adjacent its upper end with crosspiece 18. Said piece may be adjustably mounted in the frame 9 as by means of set screws or bolts 19 which may be inserted in any one of the plurality of holes 2O and '21 in the oppositel legs of the frame. Movably mounted in said cross piece 18 is the work engaging member 22. Said member may have any suitable adjustable mounting in the frame 18 but is shown as provided with ratchet teeth 23 with which a double acting pawl 24 cooperates. Said pawl is shown as pivoted to member 18 at 25 and is biased so that either| its lower tooth 26 yieldingly engages the ratchet as shown in Fig. 1 or its upper tooth 27 engages said ratchet by means of the spring 28 and link 29 which is pivotally and slidably mounted on pin 29. lVhen in the position shown in the drawings, it is obvious that the pawl will permit ready downward movement of the ratchet bar 22 to engage the work, but will prevent upward movement thereof. If on the other hand the pawl is tripped by the thumb-piece 30, the reverse is true. The work is shown in this instance as a gear 31 from which it is desired to remove its shaft 32. In placing the work on the table,

the frame 9 may be rotated to one side as indicated in dotted lines in Fig. 2. After the work is in position, the frame 1s rotated back to its vertical position against stop 1T. The gear is merely placed on the table with its shaft extending downwardly through the tube 13. In the drawings the gear is shown in the act of being placed upon the' table and before it has been lowered down to rest, upon the same. After thus placing the gear upon the table with the shaft thereof in the middle, the work engaging member 22 is lowered so that the reduced lower portion thereof 34C engages kthe shaft 32. The apparatus is now ready to lower the hand lever 2 to the dotted line position in Fig. 2, if necessary, thus exerting a powerful thrust on the shaft and removing the same from the gear.

. To place the gear or other member on a shaft or mandrel, use is made of the adji'lstable foot-bar or frame 35. Said frame is shown as; adjustablyv andpivotally suspended from the base l by means of pins 37 extending through each of the uprights ofr said frame and resting on the base l, The said uprights extend through elongated slots 38 in said base, so that they maybe moved to one side or to the center of the base. An adjustable cross-bar IO-connects the legs and serves to support the work when theappai'atus is used to place a pinion on a shaft as indicated in dottedlines in Fig. l. In this case also, an attachment il having an annular base 42 is mountedon the lower end of member 22 to engage the work (seeFig.` 4).v It will be readily apparent therefore, that by bringing the niem- 'ber 4l into engagement with the gear and supporting the shaft at the lower end by member 4:0, that the gear maybe mounted tothe support. The bottom plate l may then remain unsupported, thus making it possiblev to insert or remove mandrels'of different lengths.

Fig. 5 shows a slight modification in the method of mounting the foot vpiece35 which in this case is merely hinged to the base at 4t2. In this figure also, an alternative means to pipe 18 for mounting the base 1 and work holder 12- in lspaced relation is shown, consisting of a. plurality of rods 50, 5l. Said rods: may be threaded and the plates adjustably held thereon by nuts 52, to provide a ready means for altering the distance between the upper and lower work holders l2 and 40 on bars 35 by means of the pins y53 (Figs. 1,2 and 5), and holes 54.

In accordance with the provisions of the patent statutes, I have herein described the principle of operation of my invention, to-V gether with the apparatus7 which I now consider to represent the best embodiment the-reof, but I desire to have it understood that the apparatus shown is only illustrative and vthat the invention can be carried out by other means. Also, Vwhile it is designed to use the various features and elements in the combination andrelations described, some of these may be altered and others emitter wit-hout interfering with the more general results outlined, and: the invention extends to such use.

Having herein described my invention what I claim and desire to secure by Letters .'Patentjis,

. l. In a press, abase member, an operating lever pivoted thereon, an upper work holder *mounted in spaced relation to said base, a

loweiwcik holder, meansfor pivotally suspending tlie latter from saidY base, Vand a work engaging member for operating on the vork when supported ony either the upper oi' lower holder.

holder, of an operating leverpivotally Vmounted below said holder, a frame pivoted on said lever whereby it may be swung overV or to one side ofthe werkend adjustable means on `the fiame'for engaging the work. 3. In a press, a base member, an operating levervpivoted thereon, lan upper work holder l' mounted in spaced relationto said basefa lower work holder movably mounted on said base, and a work engaging member for operating on the work when supported on Aeither the upper or lower holder. In a press, the combination with a work holder, of an operating' lever pivot'- ally mounted below said holder, a frame pivoted on said lever whereby it may be swung over or to one side of the work, means on said base for limiting the position press comprisingy upper and lower bases,` spacing means securing saidbasesrin 'spacedrelation, a pair of hinged members pivoted on the lower base anden. each other, one

of said members being adaptedto be manto Vone side of the. worlnradjiistable lmeans Y on said base for holding said member verltically above" said work and adjustable Y means onthe Vframe for engaging the work. Y

'8. .In a press, a basemember, an operating' leverpivoted thereon, an up-perrwork holder Vmounted in spaced relationi'to said base, a lower work holder movab-ly mounted onsaid base, a work engaging member for operating on the work .when supported on for securing the upper work holderv to a Sup'- port.

9. In a press, a base member, an operating lever pivoted thereon, an upper work helder mounted in spaced relation' 'to said base, a lower work holder mounted' on said base, and a work engaging member for opmeans on Y Y 2. In a press, thecombination with a work ice i vi'ially operated, a work engaging punch on veither-'the upperor lower holder and means Y erating on the Work when supported on either the upper or lower holder.

l0. In a press, the combination with a work holder, of an operating lever pvotally mounted below said holder, a frame pivoted on said lever whereby it may be swung over or to one side of the work, means on said base for limiting the position of said frame and means on the frame for engaging the Work.

In testimony whereof I have aixed my signature.

TOWNSEND W. BURT.

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