Engine Mounting for Motor Vehicles

The invention relates to an engine mounting arrangement for motor vehicles wherein brackets attached to the vehicle body connect with damping blocks attached to the engine.

The usual procedure of assembling motor vehicles is to insert the engine from below into the body which is suspended from above, and with the two units then being interconnected from below. However, oftentimes the places where connection is to be made between the body and the engine are not easily accessible from below or are blocked by other parts, so that access to the connecting elements for mounting the engine to the body is possible only from above, i.e. when the vehicle is supported by its wheels. Thus, the initial installation of the engine into the body is only of a provisional nature and must be completed at a later time.

It is an object of the present invention to modify the procedure of installing the engine into the body to the effect that the initial step is that of establishing a self-retaining clamping connection which, at a later time, can be secured by a form-locking connection. According to the invention, the initial clamping connection is established in that each bracket attached to the body is provided with two displaceable spring-biased toothed clamping members which cooperate with toothing provided on an intermediate member that is secured to the damping block and is adapted for insertion from below between the clamping members.

The engine suspension according to the present invention simplifies and facilitates the procedure of installing the engine into the vehicle body because the operation of connecting the two units can be carried out even if the places provided for interconnecting the two units are not accessible from below but only from above.

Another advantageous feature of the invention is that the housing for receiving the clamping members is in the form of a downwardly open channel member with inwardly inclined walls. Furthermore, the channel member, the two clamping members and the intermediate member are provided with a transversely extending slot for insertion of a locking bolt to prevent unintended disengagement.

Other features and advantages of the invention will become apparent from the accompanying drawings and the associated description.

The drawings illustrate exemplary embodiments of the invention, wherein:

FIG. 1 is a plan view of the engine mounting arrangement at each engine mounting point.

FIG. 2 is a sectional view along line 2--2 of FIG. 1.

FIG. 3 is a front elevation of the bracket secured to the body.

FIG. 4 is a section along line 4--4 of FIG. 1.

FIG. 5 is another embodiment of the bracket according to FIG. 3.

The engine mounting arrangement at each engine mounting point is comprised of a bracket 2 attached to a vehicle body 1, a damping block 4 attached to an engine 3, and a wedge-shaped intermediate member 5 projecting laterally out of the damping block and adapted to be inserted from below into the bracket 2. The wedge-shaped intermediate member 5 is made, preferably, of metal and is vulcanized into the rubber 7 of the damping block 4. The bracket 2 is welded, by means of flanges 9, 10, 11 to the body 1, whereas the damping block 4 is detachably secured to the engine 3 by means of threaded bolts 12.

The bracket 2 fastened to the body 1 is comprised of the channel member 16 which forms the housing, and a pair of displaceable clamping members 17 and 18 which are retained in the channel member 16 by means of threaded bolts 19 and 20. The threaded bolts 19 and 20 extend, respectively, through apertures 21 and 22 of the channel member 16 and through coil springs 23 and 24 which engage the channel member 16 and the clamping members 17 and 18. The clamping members 17 and 18 are provided respectively, with tapered outersurfaces 25 and 26 which engage with respective inwardly inclined walls 27 and 28 of the channel member 16. The heads of the bolts 19 and 20 are urged, respectively, by the springs 23 and 24 against the web 29 of the channel member 16. The angled inner surfaces of the clamping members 17 and 18 have ratchet-like toothings 35 and 36 which engage corresponding toothings of the wedge-like intermediate member 5 in such a manner that the wedge-like member 5 can be inserted from below between the clamping members 17 and 18, but cannot be removed afterwards because the teeth of the wedge-like intermediate member 5 and those of the clamping members 17 and 18 are in locking engagement with one another to thus block movement in the downward direction. The springs 23 and 24 enable the clamping members 17 and 18 to be displaced upwardly when the intermediate member 5 is urged upwardly between the clamping members and then cause the interengagemenet of the toothings. The teeth of the toothed surfaces 35 and 36 are such that tolerance compensation can occur in the direction of toothing. The intermediate member 5, instead of having a wedge-like configuration as illustrated in FIG. 3, may also be rectangular, as illustrated in FIG. 5 and identified by the reference number 6. In this instance, the inner surfaces 37 and 38 of the clamping members 39 and 40 extend parallel to one another.

The final position of the connection is illustrated in cross-section in FIG. 4. In the walls 27 and 28 of the channel member 16, in the clamping members 17 and 18 and in the intermediate member 5 there is provided a transversely extending slot 45 through which a locking bolt 46 is inserted and fastened by a threaded nut 47 so as to make the connection secure. The slot 45 can be as wide as the tolerance required between the engine 3 and the body 1.

When being inserted between the clamping members 17 and 18, the intermediate member 5 is urged upwardly until it almost engages the web 29, so that a self-retaining clamping connection is established between the bracket 2 and the damping block 4. FIG. 3 illustrates an intermediate position. When the vehicle, after installation of the engine mounting assembly, is lowered onto its wheels, the intermediate member 5 is caused to move into the position shown in FIG. 4 in which the end face of the intermediate member 5 engages the web 29 of the channel member 16. The projection 48 in the slot 45 of the intermediate member 5 now clears the path to allow insertion of the locking bolt 46, which will also cause the intermediate member 5 to be urged upwardly, so that, after applying and tightening the threaded nut 47, the final form-locking connection is established between the body 1 and the engine 3. The tightening of the threaded nut 47 also causes the intermediate member 5, by means of the wedge-like shape of the members 5, 17 and 18 and the toothing 35, 36 to be urged upwardly against the web 29. If, on account of repair work or engine replacement, the engine mount is to be disconnected, the damping block 4 is unthreaded from the engine 3 and, after lowering of the engine 3, the damping block 4 at each mounting point can be withdrawn laterally.

The invention has been described by way of two exemplary embodiments illustrated in the drawing. However, the concept of the invention is not limited to the configurations of these particular exemplary embodiments, because a great variety of engine mounting configurations and arrangements may fall within the scope of the invention without departing from the general concept of the invention.