US3041711A - Lash adjuster body pulling tool for diesel engines - Google Patents

Description

3,041,711 LASH ADJUSTER BODY PULLING TOOL FOR DIESEL. ENGINES Filed Oct. 22, 1958 July 3, 1962 c. F. PHILLIPS ETAL 2 Sheets-Sheet 1 Posy 6'. J72! ATTORNEYS July 3, 1962 c. F. PHILLIPS ETAL 3,041,711

LASI-I ADJUSTER BODY PULLING TOOL FOR DIESEL ENGINES Filed Oct. 22, 1958 2 Sheets-Sheet 2 E II// III United States Patent 3,041,711 LASH ADJUSTER BODY PULLING TOOL FOR DIESEL ENGINES Clifford F. Phillips and Posy G. Stultz, Jr., Roanoke, Va., assignors to Charles M;- OBoyle, Wilmington, Del. Filed Oct. 22, 1958, Ser. No. 768,872 3 Claims. (Cl. 29-213) The present invention relates to lash adjuster body pulling tool for diesel engines. A type of valve bridge to which the invention is applicable is that illustrated in US. Patent 2,380,051, granted July 10, 1945 to E. W. Kettering, in which the valve bridge is equipped with two hydraulic lash adjusters which engage the exhaust valve stems of the engine for opening the exhaust valves on downward movement of the bridge pursuant to a rocker arm action.

Such illustration as is contained in the present application may be identified with respect to the valve bridge and hydraulic lash adjusters by the same reference numerals as employed in said patent.

It is to be understood at the outset that the valve bridge including the hydraulic lash adjusters is removed from its upright position in the engine and inverted to be placed upon a servicing and testing tool or implement which forms the subject matter of our copending application entitled, Servicing and Testing Device for Valve Bridges and Hydraulic Lash Adjusters of Diesel Engines, Serial No. 768,871, filed October 22, 1958.

It is an object of the present invention to provide a tool for pulling hydraulic lash adjuster bodies or shells from their press lit in the recesses of the valve bridge, this being done after the snap ring is removed which holds the hydraulic lash adjuster plungers in place and after such plungers, springs, valve fixtures and ball valves have been removed, although it is possible with the tool of this invention to remove all of these parts at one and the same time by the use of this tool.

After all of these removed parts have been cleaned, serviced, tested and any necessary replacements made, the valve bodies or shells are driven back into their recesses in the valve bridge by means of a tool which is the subject matter of our copending application entitled, Installing Tool for Assembling Hydraulic Lash Adjuster Bodies of Diesel Engines, Serial No. 768,873, filed October 22, 195 8.

It is another object of the invention to provide a pulling tool of the above type which will be simply constructed and simple in operation although of rugged mechanical construction' The invention has for a further object to provide a pulling tool so constructed and arranged as to be rapidly put into an operative position on the valve bridge as the bridge reposes upon the support afliorded by the device of the first-mentioned copending application.

It is a still further object of the invention to provide a pulling tool which will exert great pulling force and which may be quickly removed and de-mounted from the bridge after the pulling operation.

With the foregoing and other objects in view, the invention will be more fully described hereinafter, and will be more particularly pointed out in the claims appended hereto.

In the drawings, wherein like symbols refer to like or corresponding parts throughout the several views:

FIGURE 1 is an exploded side elevatioual view of a form of tool constructed in accordance with the present invention;

FIGURE 2 is a similar view taken edgewise at substantially right angles to the position of FIGURE 1;

FIGURE 3 is an edge elevational view of the tool assembled with the handle partly broken away;

3,041,711 Patented July 3, 1962 ice FIGURE 4 is a vertical sectional view taken through the tool with the links lowered and the jaws outspread;

FIGURE 5 is a horizontal sectional View taken on the line 55 in FIGURE 3;

FIGURE 6 is a top plan view, taken on an enlarged scale, of a form of housing employed;

FIGURE 7 is a bottom plan view of the same;

FIGURE 8 is a vertical sectional view taken through the housing on the line 8-8 of FIGURE 6;

FIGURE 9 is a side elevational view of a form of valve bridge with the tool of this inventionshown in an initial applied position with the cam lever raised; 7

FIGURE 10 is an end elevational view of the valve bridge shown in FIGURE 9 with the tool shown in side elevation as applied thereto and with the cam lever in an initial position, and

FIGURE 11 is a view similar to FIGURE 10 with the cam lever partially rotated to applied position and with the valve body or shell partially removed from the valve bridge.

Referring more particularly to the drawings, 38 designates a valve bridge in an inverted position on the device of the first-mentioned prior application, such valve bridge having two hydrauli lash adjusters therein 'with valve bodies or shells 42 having lower flanges 42 (which are uppermost in the inverted position of the bridge). Slots 7%) are made in pairs in the valve bridge at diametrically opposite sides of the recesses which house the hydraulic lash adjusters at each end of the bridge 38, such slots being for the purpose of exposing the space beneath the flanges 42 for engagement by the hooks, tongs or jaws of the present tool.

A hollow housing or tube 81, open at both ends, constitutes a relatively stationary part of the tool, such housing having a preferably cylindrical bore 82 .at least in its lower portion and at its lower end a bottom ring 83 to fit around the flange 42 and seat on the valve bridge 38. The lower end portion of the housing 81 is reduced to form the ring 83 simply for clearance to avoid other parts of the valve bridge. Slots 84 are provided in the housing 81 at diametrically opposite sides thereof, such slots extending down through the bottom ring 83 and opening through the lower end of the housing 81.

The housing 81 has an upstanding web 85 preferably in line with the slots 84 and in such web is a slot 86 elongated in the direction of the axis of the housing 81. A pin 87 is fitted through the slot in the web 85. The pin is also received in bearing openings 88 in spaced or bifurcated legs 89 of a hand lever 90. Cam edges 91 are formed along the edges of the legs 89 to ride on follower surfaces 92 at the upper end of the housing 81.

The pin 87 is also inserted through upper openings 93 in a pair of links 94, the links being disposed on opposite sides of the web 85; The upper ends of the links 94 and of the web 85 are together inserted between the legs 89 so as to align the openings 88, 86 and 93 for the passage of the pin 87 which may then be peened over on the outside walls of the legs 89.

The links 94 are also provided with lower openings 95 to receive a pin 96 on which tongs or jaws 97 are pivotally mounted, such tongs 97 having openings 98. One of the tongs is formed with bifurcated perforated ears 99 to receive therebetween the perforated tang 100 of the companion jaw, the upper ends of the jaws being therefore interfitted so that the openings 98 thereof are in alignment with one another and with the lower openings 95 in the links 94.

The-tongs or jaws 97 may be given any suitable con-- ride up and down in the bore 82 whereby the wall of thehousing 81 will confine the pin'in place and the shortest radial value rest on the follower surfaces 92' which enables the pin 87 to descend in the slot 86 and allow lowering therewith of the links-94 and the jaws 97. Such jaws are brought into alignment with the slots 70 so that the lugs 102 engage beneath the flange 42', at which time the handle 90 is rotated through approximately ninety degreesto bring the high lobes of the earns 91 against the follower surfaces 92 of the stationary housing 81. V

In executing this movement, the pin 87 will be raised in the slot 86entraining therewith the links 94 and the jaws 97, which latter will slide up in the slots 34. Such jaws will act in the manner of ice tongs to grip'the valve body or shell 42 beneath the flange 42'. As the upward thrust continues, the jaws 97 will tend to move together on the valve body 42 and insure the gripping of the same throughout the elevating operation. The earns 91' will develop great mechanical advantage and power and will very quickly and easily lift the valve body 42 out of its pressed'flt in the bridge; The entire tool may be lifted from the bridge in the same operation raising the valve body, 42 clear of the bridge so that it may be conveniently and quickly disengaged from the 'jaws 97 by a manual operation which consists in swinging one or both jaws backwardly away from the flange 42', itbeing understood that the jaws 97 are freely pivbody 42 which has been drawn by the lifting action up into the cylindrical bore 82 of the housing 81.

Although we have disclosed herein the best form of substantial alinernent with the-invention known to us at this time, we reserve the right to all such modifications and changes as may come within the scope of the following claims.

We claim: a a V 1. For use with a valve bridge of a diesel engine in portions seated on the upper'ends of'the recess walls and extending acrossthe upper ends of the pairs of slots, at pulling tool comprising atubular housing having a lower open end for fitting about the valve body'flange to locate the tool to the work with the axis of the housing substantially coincident with the axis of the valve body, guide means in an upper portion of the housing in alinement with said axes, an actuating pivot pin in the guide means restrained thereby to a movement in line with said axes, actuating means for moving the actuating pin upwardly in the guide means, a linkage hung from the actuating pin and movable up and down in the housing, a. jaw pivot pin supported in the linkage below and in 4, V the actuating pivot pin and disposed in the lower portion of the housing with its ends guided up and down by the internal walls of the housing, said lower portion of the housing having slots spaced 'angularly from the ends of the jaw pivot pin, and jaws slidable and swingable up and down in and out of the housing slots and mutually pivoted at their upper ends to the jaw pivot pin.

2. For use with a valve bridge of a diesel engine in an inverted positionhaving recesses opening upwardly with opposed pairs of slots through the recess walls also opening upwardly in which recesses are press fitted valve bodies having outstanding flanges at their upper portions seated on theupper ends of the recess walls and extending across the upper ends of the pairs of slots, a pulling tool comprising a tubular housing having a lower end removably fitting about the flange for orienting the tool to the work and abutting the bridge to render said housing stationary, said housing also having a pair of opposed slots in its lower portion for registering with the bridge slots, a pair of jaws slidable freely up and down in the housing slots and having intermediate portions shaped to fit about the flange ofthe valve body and lower end portions to'engage beneath the flange through the bridge slots, a jaw pivot through the upper end portions of the jaws from which the jaws are supported to swing in the housing slots freely downwardly together by gravity to a closed position without interference from the stationary housing, support means for the jaw pivot mounted for free up and down movement in the housing, and actuating means carrying the upport means and reacting with the stationary housing to lift the jaws and entrained valve body, said support means comprising at least two spaced links articulated at their lower end portions with the jaw pivot, an actuating pivot about which upper end portionsof the links are hung and to which the actuating means is coupled, and an upstanding web on the housing having an upright slot for slidably receiving the actuating pivot and against the sides of which the links are slidably fitted.

3. A pulling tool as claimed in claim 2 in which the web slot is centered substantially vertically above the jaw pivot and guides the actuating pivot in a substantially vertical straight line path, said housing having cam follower surfaces at upper portions thereof at opposite Sides of the links, and said actuating means comprising spaced cams rotating about the actuating pivot and seated on and above the follower surfaces whereby contact of the high points of the cams with the follower surfaces will raisethe actuating pivot, connected links, jaws and entrained valve body by thrust downwardly on the housmg in the direction of the bridge.

References Cited in the file of this patent UNITED STATES PATENTS

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