CS225441B1 - Resilient seat of the machine - Google Patents

Description

BACKGROUND OF THE INVENTION The present invention relates to a flexible machine bed which, in terms of anti-noise measures, acts as a damping layer on rubber springs when transmitting excitation forces to the structure. It solves such cases in which, due to reduced vibration transmission, rubber springs of very low mechanical impedance are used, which are most effective in terms of vibration transmission. However, in such a bearing arrangement, due to the influence of external forces on the supported machine (inertial forces, etc.), its disproportionately large deflections in a certain direction occur. These deflections then result in, for example, undesirable changes in driving characteristics, shaft misalignment, etc.

The requirement for greater stiffness of the bearing arrangement in a particular direction is currently addressed by the use of specially shaped rubber springs, spring-loaded strut bars, etc. However, such solutions do not allow the use of rubber members with too little mechanical impedance, resulting in increased vibration transmission.

These drawbacks are overcome by the invention which consists of a rubber spring which is rigidly attached to the machine support structure by a flange. The spring is fixed to the machine by a pin on which the inner ring of the sliding or rolling bearing is pressed. The outer bearing ring is connected by an external rubber spring to a peripheral flange which is connected to the support structure.

By using a sliding or rolling bearing, less excitation of the supporting structure is achieved. A suitable combination of mechanical impedances and dimensions of rubber springs can then achieve an optimal solution to the problem indicated.

In the drawing, Fig. 1 shows the effect achieved by using a rolling bearing and Fig. 2 indicates one possibility of a particular solution of the flexible bed of the machine.

-z225 441

The driving force F, FIG. 1 / when moved along its wearer, it extends into two perpendicular with ¹ stitches and F ₂ · Outer rubber spring 9 of higher mechanical impedance and thus of lower attenuation is the transmission path of excitation force and friction force £ 2 * Friction force size T? is directly proportional to the friction coefficient f / T ₂ = F ₂ »f /, which is very small in the case of a rolling bearing and hence the construction excitation by T _{2 is} lower. The inner rubber spring 8 / fig. 2 / is vulcanized by a pin 3 and a flange 4 which is fixedly connected (screw connection) to the supporting structure 2. The inner ring 5 of the bearing is pressed onto the pin 3, the machine 1 is connected to the pin 3 by a screw connection. an assembly in which rubber springs 8 with very low mechanical impedance (with respect to static loads etc.) are used, resulting in high vibration damping with excitation forces in the vertical direction. The outer rubber spring 9 is rigidly connected to the outer bearing ring 6 and the circumferential flange 7. The outer bearing ring 6 may be formed by two segments in order to limit the radial clearance of the bead ring 10. The outer rubber spring 9 is made of rubber of relatively higher mechanical impedance, which limits the displacement of the aggregate due to external forces in the horizontal plane. The contact between these units is mediated by a rolling bearing with a ball ring 10.

Such resilient bearings can be used not only for the resilient bearing of the machine itself, such as the power packs of motor vehicles, but wherever under certain conditions the design requires reduced vibration transmission.

Claims (1)

SUBJECT OF THE INVENTION 225 441 Flexible bed of the machine, characterized in that it consists of a rubber spring (8) which is fixedly connected to the supporting structure (2) by a flange (4) and fixed to the machine (1) by a pin (3) onto which the inner ring (1) is pressed. 5) a sliding or rolling bearing, the outer ring (6) of which is connected by an outer rubber spring (9) to the peripheral flange (7) which is connected to the supporting structure (2).