DE1911299C - Storage for rocker arms of internal combustion engines - Google Patents

Claims (2)

I 2 The invention relates to a mounting for rocker arm This laterally displaced mounting of the tilting of internal combustion engines, in which the bearing eye hebelwcllc generates additional and unfavorable claws of the rocker arm through a bearing eye associated with the bearing block and its fastening elements.
Neten, essentially cylindrical bearing pin from the invention is therefore based on the object of a bearing eye and bearing pin penetrating 5 while avoiding the disadvantages of the known tilting and screwed into the cylinder head screw hcbellagerungen with simple means this is withstood, with the bearing eye to form approximately coaxially that not only a simple exchange with the screw axis has openings, of which individual parts are possible, but also that through the arrangement and design of the individual parts of the rocker arm movement, which is sensible to the size of the cylinder head, to accommodate io large crutches despite the small dimensions braced with the bearing pin and can be taken from. Screw penetrated support for the bearing pin This task is expanded according to the invention is cut out. solves that the support as a bearing block with one of the In known bearings for rocker arms of the type called Teilzyhndriscnen bearing journals (German patent 377 318) 15 is provided and the bearing pin over the screw forms the load-bearing element of the tilt bearing through the lifting bearing designed as an expansion screw. Is also braced with the cylinder head in another known screw.
Rocker arm mounting (US Pat. No. 2,976,862) is preferably the bearing pin about the width of a one-piece screw as a bearing block and carrier of the rocker arm. . ,
designed for the bearing pin. An embodiment of the invention is shown in Several other rocker arm bearings (USA.- Drawing shown and will be explained in more detail below Patents 3,198,183, 3,270,727, 3,359,959 and described. Ea shows German utility model 1 938 943) are in the we- F i g. 1 shows a longitudinal section through the inventive structure constructed according to the same principle, that is, according to the rocker arm mounting,
a pan-like rocker arm made of sheet metal is supported on 25 Fig. 2 a cross section according to Fig. 1,
its two ends on a valve stem or Fig. 3 a top view corresponding to Fig. 1, a cam-controlled bumper, whereby only the part arranged on the cylinder head 1 is the deepest silence of the rocker arm socket shown in Fig. 1 Storage point is provided. The last named USA.- of the valve train drawn. The rocker arm 2 supports the patent as an alternative to a one-piece 30 with its bearing eye 10 rotatable on a bearing block and carrier for a bearing socket pin 3, which is supported on a bearing block 4, serving screw already in place of a bearing with the help an expansion screw 5, the bearing block forming collar of the screw a special spacer tube pushed onto the pin 3 and the bearing block 4 on the cylinder head 1 screw are screwed tight. The expansion screw 5 is tightened with a torque which is correspondingly large by means of the screw together with the 35 so that the bearing socket is clamped to the cylinder head. it is under a sufficiently high bias. This spacer tube is not suitable, however, as a support function of the holding The rocker arm 2 also has an adjusting screw 6 that absorbs forces. the lower end of which to take over the screw from the cam. activated bumper 7 attacks. The other side of the The bearing rocker arm 2 penetrated by the retaining screw is supported on the valve stem 8 of the pan is in the known cases each corresponding valve not shown here. The valve formed chcnd the bearing point on the rocker arm. Since the force of the spring 9 in its closing The holding position held by the known rocker arm bearings. In addition, the spring force is a burden screw the function of a bearing block to the tilting bracket. Since the expansion screw 5 have to take over, these are correspondingly large 45 has a correspondingly large preload dimensioned. the force of the spring 9 already from this preload This type of rocker arm mounting is very susceptible to force. When the internal combustion engine is operated against bending moments, so that in addition to the normal machine there are also the gas and inertia forces, additional bending stresses in the form of threshold stress. As this operating screw occur. At rest, the screw has a large part of the pre-tensioning force of the internal combustion engine, no stresses, the expansion screw 5 is absorbed, that is, only the force of the valve spring acts. In the alternating stress of the screw, which is not so great, this screw is constantly exposed to the tension, as is the case with the rocker arm bearings that have been customary up to now,
state zero swelling with an impact. The particular advantage of this rocker arm mounting, which corresponds to the entire operating force, is that relatively small screws speak. This fact also explains which can be used and that each shows a good, large dimensioning of the screw. In addition, individual rocker arms can be exchanged. this type of rocker arm mounting is very susceptible to ...
Hanging coinents, so that apart from the normal stress there is a tension:
additional bending stresses occur in the screw. I λ is already known, the bearing block of machines in which the bearing eye of the Kipp-Kipplielielllageringen (German patent S76 6I8, hebeis by a German utility model 1783 497 assigned to the bearing eye) with the help of essentially cylindrical bearing journals from an expansion screw on the cylinder block securely place a bearing eye and bearing journals penetrating, but with these known bearings 65 and screwed into the cylinder head the Kippheheladisen is held outside the axis of the expansion screw, the bearing eye about screw or outside of the entire expansion screw mounted coaxially with the screw axis openings . has, of which the cylinder head to- Applied to the greetings of the rocker arm movement corresponding to the inclusion of a bearing pin braced with the bearing pin and penetrated by the screw is cut out for the bearing pin, characterized in that, that the support as a bearing block (4) with a partially cylindrical bearing pin (3) receiving Bearing muldo is provided and the bearing pin (3) over the support through the as an expansion screw (5) trained screw is braced with the cylinder head (1). 2. Storage according to claim 1, characterized in that the bearing pin (3) is approximately the width of the rocker arm (2). 1 sheet of drawings