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1. (WO2019009838) AN ENGINE MOUNT FOR VEHICLES
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AN ENGINE MOUNT FOR VEHICLES

The present invention relates to an engine mount which is suitable for use in motor vehicles and wherein the core and the damper are connected to each other via shape fitting (non-permanent joint).

In motor vehicles, the engine is mounted on the engine mounts which are fixed onto the vehicle chassis. Since the engine mounts are formed of vulcanized rubber and metal components, they damp the engine vibrations and prevent transmission of the oscillation and thus the oscillation induced noise to the chassis. Particularly in heavy duty commercial vehicles, damages of engine mounts are encountered very frequently. Road conditions, engine characteristic and driving conditions overstrain these parts which support the engine and the transmission and damp the coming vibrations.

In the European patent document no. EP 1690722, an application in the state of the art, the damper includes a peripheral channel. However the form of the core in the center of the damper in this document is cylindrical.

Another related patent document in the state of the art is the German patent document no. DE2228394. In this document the damper has a curved surface. However the metal core in the center of the damper in this document is also cylindrical.

The Great Britain patent document no. GB638988, which is another state of the art document, discloses a damper placed inside a housing and it is seen that the metal core in this document also has a cylindrical form.

In an application in the state of the art, the core provided in the damper is preferably in the form of a truncated circular cone. In the said application, the metal core functions under pulling forces only with an adhesive member between the rubber from which the damper is made of and the metal part, and in the case of compressive forces, it works upon squeezing of the rubber due to the angular design of the metal core. Due to this design of the metal core, the damper is frequently damaged thereby causing adverse situations for the vehicle and the driver. In this case, the vibrations cannot be prevented and thus damages resulting from the vibrations are encountered in the other systems and the driver and the passengers are disturbed in the vehicle cabin (Figure 1).

The objective of the present invention is to provide an engine mount functioning upon shape fitting connection under all forces.

The engine mount; which is developed to fulfill the objective of the present invention, and which is defined in the first claim and the claims dependent thereon; comprises a core that is placed inside the damper and has at least one recess and/or protrusion on the lateral surface thereof. The present invention improves the strength and the working characteristic of the engine mount which connects the engine and the transmission to the chassis.

By means of the recess and/or protrusion on the lateral surface of the core, the core is enabled to create a shape fitting connection in the material from which the damper is made of and to act exactly like an anchor under both pulling and compressive forces.

Thanks to the recesses and/or protrusions provided on the lateral surface of the core, since the surface area of contact with the damper increases, the amount of damper that is used increases as well. Increasing the amount of damper enables to damp the vibrations and impacts acting on the engine mount more extensively. This in turn directly influences noise, vibration and harshness parameters in a positive manner thereby ensuring customer satisfaction. Additionally, the fact that the surface area of the lateral surface is increased enables the core made of metal and the damper made of rubber to be adhered to each other more efficiently and on a larger surface area.

By means of the present invention, frequent damages of components are prevented thereby the drivers and passengers are ensured a more comfortable travel, repair/maintenance costs are reduced and raw material consumption and time losses are minimized.

An engine mount developed to fulfill the objective of the present invention illustrated in the accompanying figures, in which:

Figure 1 is a side view of the prior art engine mount and the view of A-A section. Figure 2 is a side view of the engine mount of the present invention.

Figure 3 is a view of A-A section in Figure 2.

Figure 4 is a side view of the core.

Figure 5 is a view of the A-A section in Figure 4.

The components shown in the figures are given reference numbers as follows:

1. Engine mount

2. Damper

3. Core

4. Base

5. Top

6. Lateral surface

7. Recess

8. Protrusion

In motor vehicles, the engine mount (1), which is mounted to the chassis, and on which the engine is fixed, comprises a damper (2) and a core (3) that is placed inside the damper (2) and surrounded by the damper (2). The engine mount (1) has a top (4), a base (5), and a lateral surface (6) connecting the top (5) and the base (4) on the core (3), and has at least one recess (7) and/or protrusion (8) on the lateral surface (6). By means of the recess (7) and/or protrusion (8), the contact surface area of the core (3) with the damper (2) is increased. This way, the core (3) and the damper (2) are enabled to be adhered more efficiently and on a larger surface area. Thus, the core (3) works like an anchor as a shape fitting connection in the damper (2) under both compressive forces and pulling forces thereby preventing disconnection and rupture of the damper (2) (Figure 2 and Figure 3).

In the preferred embodiment of the invention, the damper (2) is made of rubber and the core (3) is made of metal.

The engine mount (1) comprises a recess (7) and a protrusion (8) neighboring the recess (7) on the lateral surface (6) of the core (3). In the preferred embodiment of the invention, the recess (7) and the protrusion (8) are curved. This way, deformations that might be caused by the core (3) on the damper (2) that is made of rubber are prevented.

In the preferred embodiment of the invention, the protrusion (8) remains in between the two recesses (7). This way, both compressive and pulling forces act on both surfaces of the protrusion (8), and thus, the damper (2) is prevented from being disconnected from the core (3).

In one embodiment of the invention, the recess (7) is in the form of a groove. By means of the grooved from of the recess (7), the rubber fills in the recess (7) completely and thus the surface area where the damper (2) and the core (3) contact each other is increased. This way, the core (3) forms a stronger shape fitting connection with the damper (2) and cooperates with it kind of like an anchor. Thus, the strength of the engine mount (1) is increased and the vehicle characteristic is influenced positively by improving the noise, vibration and harshness parameters (Figure 4 and Figure 5).

The recesses (7) and the protrusions (8) surround the entire lateral surface (6) of the core (3).

In the preferred embodiment of the invention, the base (4) and the top (5) of the core (3) are circular and the top (5) is larger than the base (4).

In one embodiment of the invention, the core (3) and the damper (2) are connected upon being vulcanized.

The engine mount (1) prevents the vibrations coming from the engine from reaching the chassis and the vehicle cabin. By means of the present invention, the metal core (3) and the rubber damper (2) cooperate not only by means of an adhesive member but also by a shape fitting connection. By this means, the vibrations are prevented, and thus the damages induced by vibrations are prevented as well as the discomfort of the driver and passengers in the cabin caused by the vibrations. The present invention improves the strength and the working characteristic of the engine mount (1) which connects the engine and the transmission to the chassis.

In the engine mount (1) of the present invention, the core (3) is enabled to function under both compressive forces and pulling forces by forming shape fitting connection within the rubber material from which the damper (2) is produced. Furthermore, both the strength of the engine mount (1) and the amount of the rubber that is used are increased. Increasing the amount of rubber material enables to damp the vibrations and impacts acting on the engine mount (1) more extensively. This in turn directly influences noise, vibration and harshness parameters in a positive manner.

By means of the present invention, in addition to preventing frequent damages of components, the drivers and passengers are ensured a more comfortable travel,

repair/maintenance costs are reduced and raw material consumption and time losses are minimized.