KR20050005933A - Roll mounting apparatus for engine - Google Patents

Abstract

PURPOSE: A roll mount structure of an engine is provided to prevent vibration of the engine produced from being transmitted to a vehicle body and to prevent vibration resulting from the travel of a vehicle from being transmitted to the engine. CONSTITUTION: In a roll mount structure of an engine, an insulator(40) of a rubber material is inserted in an annular ring(31) to constitute predetermined spaces to the upper and lower right and left directions. A bracket(32) to be fixed to a side member(60) of a vehicle body is formed to a side of the annular ring. A core(50) for fixing a stay connected to the engine side is inserted in a central shaft of the insulator. The insulator is divided into an upper insulator(42) and a lower insulator(44). A gap of a predetermined interval is maintained between the opposed surfaces of the upper insulator and the lower insulator. A groove part(43) is formed to the bottom of the upper insulator. A protrusion part(45) is extended to the top of the lower insulator. A predetermined gap is maintained between the groove part and the protrusion part.

Description

Roll mounting apparatus for engine

The present invention relates to a roll mounting structure of an engine, and more particularly, to prevent the vibration of the engine generated during engine driving from being transmitted to the vehicle body, and to prevent the vibration of the vehicle from being transmitted to the engine during driving of the vehicle. It relates to a roll mounting structure of the engine for.

In general, a significant vibration is generated in the engine due to the periodic change of the center position due to the vertical movement of the piston and the connecting rod, the inertial force of the reciprocating portion occurring in the cylinder axial direction, and the periodic change of the rotational force applied to the crank shaft in the connecting rod. The engine is supported on the chassis frame or the body, but the engine mounting portion should be provided with an engine support by the elastic body so that the vibration of the engine is transmitted to the chassis frame or the body so that the riding comfort is not bad. The engine support device must be designed to take into consideration the size, chassis, and structure of the engine for the location, number, structure, and the like of the support part, since the engine must be capable of withstanding weight while absorbing and absorbing vibration.

In general, the inertial supporting system is supported by four points, and the mounting of the engine and the transmission is mounted on the torque roll shaft of the side member of the vehicle body, and the roll mount is mounted in the front and rear directions of the subframe. In particular, in the case of a roll mount, it consists of a support and an insulator so that attachment and detachment are easy in a real vehicle state.

And in the inertial support engine mounting system, the rubber characteristics of the roll mount are chassis parts that play a very important role in determining the vibration noise performance of the vehicle in the idle state and the driving state. The rubber characteristics of the roll mount depend on the spring constant and damping characteristics of the rubber and the mounting angle. The smaller the spring constant and the larger the damping value, the better the vehicle's vibration noise performance. The rubber characteristics of the roll mount are physical values, which are limited to lowering or increasing the values. If the tuning is performed only with the spring constant of the rubber, the insulation rate is reduced. In order to overcome this limitation, after setting the spring constant of the appropriate rubber, it is possible to indirectly adjust the spring constant by adjusting the mounting angle of the roll mount.

4 to 5 show a conventional roll mount, wherein the roll mount 10 is a rubber insulator 20, an annular ring 11 for accommodating the insulator 20, and the ring It is formed on the bracket 12 for extending to one side of the (11) to be coupled to the side member of the vehicle body, and the stay (13) for supporting one side of the engine is fitted on the central axis of the insulator 20. The insulator 20 is bonded to the inner periphery of the ring 11 in a bridge shape with a predetermined space up and down inside the ring 11, and the insulator 20 up and down the insulator 20. The upper stopper 22 and the lower stopper 24 are formed to cushion the shock when the s hit the inner circumference of the ring 11. On the other hand, on the central axis of the insulator 20, the core 15 for inserting the bolt 14 for fixing the stay 13 is injected.

Therefore, the vibration transmitted between the engine and the vehicle body by the roll mount 10 provided between the engine and the vehicle body is absorbed by the insulator 20 and the upper and lower stoppers 22 and 24.

However, when the vibration of the vehicle is generated due to the acceleration of the roll mount, the upper end of the insulator collides with the upper stopper as shown in FIG. 6. In this process, the spring constant in the left and right directions of the insulator is rapidly increased. In addition, the insulation effect is reduced by absorbing vibration only on one side of the upper stopper. At the same time, the insulation characteristic of the insulator is sharply lowered, and the acceleration and transmission noise is introduced into the room through the bracket and the side member, thereby booming or There was a problem that NVH performance is degraded while driving while producing a harsh noise (Harsh noise).

Accordingly, the present invention has been made to solve the above problems, to prevent the vibration of the engine generated when driving the engine to the vehicle body, and to prevent the vibration caused by the driving of the vehicle to be transmitted to the engine when driving the vehicle. The purpose is to provide a roll mounting structure for the engine.

The present invention as a means for achieving the above object,

An insulator made of rubber material is inserted into the annular ring so that predetermined spaces are provided in up, down, left and right directions, and a bracket for fixing a key is formed on one side of the ring to a side member of the vehicle body. In the roll mount is inserted into the core for fixing the stay connected to the engine side,

The insulator is separated into an upper insulator and a lower insulator, but a gap of a predetermined interval is maintained between the surfaces of the upper insulator and the lower insulator, and a lower portion of the upper insulator is formed so that the center portion thereof is unevenly coupled. Grooves are formed on the surface, and a protrusion having a size that maintains a predetermined gap with the groove is extended on the upper surface of the lower insulator.

1 is a side cross-sectional view of a roll mount formed by the present invention.

2 is an operating state of the roll mount during bumping.

3 is an operating state of the roll mount at the time of rolling.

4 and 6 are views for explaining the conventional technology.

※ Explanation of code for main part of drawing

30: roll mount 31: ring

32: bracket 40: insulator

42: upper insulator 43: groove

44: lower insulator 45: protrusion

46: upper stopper 48: lower stopper

50: core 52: heartwood

54 core holder 60 side member

Hereinafter, a preferred embodiment according to the configuration and operation of the engine mounting apparatus according to the present invention will be described in detail with the accompanying drawings.

1 is a side cross-sectional view of a roll mount formed by the present invention, FIG. 2 is an operating state diagram of the roll mount during bumping, and FIG. 3 is an operating state diagram of the roll mount during rolling.

Reference numeral 30 indicated in the drawing indicates a roll mount formed by the present invention, and reference numeral 40 indicates an insulator formed by the present invention.

In the roll mount 30, rubber insulators 40 and stoppers 46 and 48 are positioned inside an annular ring 31 having a predetermined width, as in the conventional roll mounting. In the middle of the peripheral portion, the bracket 32 for fixing to the side member 60 of the vehicle body is integrally formed, and the core 50 for supporting the stay connected to the engine side is interposed in the middle of the insulator 40. The adhesive surface of the insulator 40 in contact with the inner circumferential surface of the ring 31 is vulcanically bonded to the inner circumferential surface of the ring 31.

And the insulator 40 formed by this invention is separated and formed in the upper and lower parts. First, the lower insulator 44 is formed to have a lower stopper 48 in the middle of the lower portion of the lower insulator 40 and an upper surface of the lower stopper 48. A predetermined space is provided. In addition, the upper insulator 44 is formed in a 'Y' shape in which both sides of the upper part are opened to both sides with respect to the upper stopper 46, and a bottom surface of the upper stopper 46 and an upper side of the upper insulator 40. A predetermined space is provided in the liver.

In particular, between the bottom surface of the upper insulator 42 and the upper surface of the lower insulator 44 is formed in a shape in which the center portion is unevenly coupled so that a predetermined gap can be maintained during engine idle. The groove 43 is formed on the bottom surface, and the protrusion 45 is formed on the upper portion of the lower insulator 44.

In addition, the lower insulator 44 is interposed with a core 50 for supporting the stay connected to the engine side, the core material 52 for reinforcing the protrusion 45 on the upper portion of the core 50 It is integrally formed. On the other hand, the groove portion 43 of the upper insulator 42 is formed with a core holder 54 for reinforcing the inner surface of the groove portion 43.

The operation of the roll mount configured as described above is as follows.

In the process of starting the engine and driving the vehicle, vibrations are transmitted between the engine and the vehicle body by vibrations of the engine itself and vibrations according to driving conditions. The roll mount 30 absorbs the vibration and blocks the vibration and noise of the engine from being transferred into the cabin of the engine.

When bumping the vehicle through the uneven section and causing the engine to vibrate up and down, as shown in FIG. 2, a gap between the upper insulator 42 and the lower insulator 44, the protrusion 43, and the groove portion ( The gap between the 45 and the space between the upper insulator 42 and the upper stopper 46 is narrowed or the surface facing each other to absorb the vibration.

When rolling the engine generated by the driver's acceleration and deceleration while the vehicle is running, the protrusion 45 of the lower insulator 44 comes into contact with the inner surface of the groove 43 of the upper insulator 42 and vibrates due to rolling. Will absorb.

In particular, in the case of the roll mount 40 according to the present invention, the core of the lower insulator 44 is pushed inside the groove 43 of the upper insulator 42 at the time of bumping and rolling of the engine. Since the force transmitted to the upper insulator 42 by the holder 54 is distributed to both sides, the insulating property is improved than in the case of the prior art.

According to the present invention configured as described above, unlike the prior art during bumping and rolling of the engine generated during engine driving and driving of the vehicle, even if a force is transmitted from the lower side of the center of the roll mount to the upper side, There is a big advantage that the insulation properties of the roll mount is improved by being distributed to both sides.

Claims (3)

An insulator made of rubber material is inserted into the annular ring so that predetermined spaces are provided in up, down, left and right directions, and a bracket for fixing a key is formed on one side of the ring to a side member of the vehicle body. In the roll mount is inserted into the core for fixing the stay connected to the engine side, The insulator 40 is divided into an upper insulator 42 and a lower insulator 44, but a gap of a predetermined interval is maintained between the surfaces of the upper insulator 42 and the lower insulator 44. The groove 43 is formed on the lower surface of the upper insulator 42 so that the central portion thereof can be unevenly coupled, and a predetermined gap is maintained with the groove 43 on the upper surface of the lower insulator 44. Roll mounting structure of the engine, characterized in that the protrusion 45 of the size is extended. The method of claim 1, The core 50 is inserted in the middle of the hub insulator 44, and a core 52 for protruding the protrusion 45 is protruded from an upper portion of the core 50. rescue. The method of claim 1, The inner surface of the groove portion 43 of the upper insulator 42 is wrapped with a core holder 54 for reinforcing the groove portion 43. The roll mounting structure of the engine.