JPS62132017A - Eccentric drive for gyrating mass body - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The invention relates to an eccentric drive for a rotating mass, the drive being configured as a first eccentric, acting on at least one point of the rotating mass. at least one of the rotating masses having a device and spaced apart from the point of application of the rotating mass;
a guide device acting on two separate points and constituted by a second eccentric device, and a bearing device provided at at least one of said two points of action, which is connected to a bearing ring of said bearing device and a rotating mass. The invention relates to a type having an elastic bearing bearing consisting of a rubber-elastic molded ring supported between the bearing eye of the body.

PRIOR ART Eccentric drives of this type are described in previously filed patent applications by the same inventor.

In this case, the elastic bearing bearing, constituted by an elastic molded ring with a spring coefficient increasing in the radial direction, may be affected by the sum of manufacturing tolerances or by mutually different thermal expansions between the two points of application. It is used to compensate for the load caused by the sum of errors due to In the case of this known eccentric drive, it is possible to fix the bearing ring axially in the bearing eye of the rotary plate by inserting the molded ring into a consistent ring groove in the bearing ring or in the bearing eye with a slight axial clearance. This is done by inserting the two components into each other and thereby axially fixing the two components to each other by means of a form-fitting connection. The fixation in the circumferential direction is then obtained by means of a special, for example cylindrical, reinforcing element which is provided around the molded ring and which fits into corresponding recesses in the bearing eye and the bearing ring. ing.

However, in order to be able to secure the bearing ring in this form-fitting manner to the rotating mass, special working steps have to be carried out during manufacture. For example, a ring groove must be painstakingly formed on both the inner periphery of the bearing eye and the outer periphery of the bearing ring, and furthermore, in order to fix the ring in the circumferential direction, an additional axial groove must be cut into the component part. Must be installed on the outer periphery.

If the bearing ring is fixed in the axial direction by means of a fixing ring, then a circumferential groove must be formed in at least one of the components, which likewise increases production costs.

The problem to be solved by the invention is to improve an eccentric drive of the type mentioned at the outset, making it possible to fix the bearing ring relative to the rotating mass at a small cost. It is necessary to configure it as follows.

Means for Solving the Problems The structure of the present invention that solves the above-mentioned problems is such that the frictional force formed between the molded ring and the bearing ring or the rotating mass is caused by the friction between the bearing ring and the rotating mass due to the load generated during operation. The forming ring is inserted and held under such a radial prestress that it avoids relative axial or circumferential displacement with the body.

Effects of the Invention With the arrangement of the invention, an axial and circumferential fixation by a frictional connection between the molded ring inserted and held under radial preload and the bearing ring or rotating mass is obtained. In this case, this frictional connection eliminates relative displacements between the components that can occur due to the loads occurring during operation.

Embodiment In order to provide as simple a device as possible for the installation of a molded ring, it is provided that, according to an embodiment of the invention, the molded ring is formed between the inner periphery of the bearing eye of the rotating mass and the outer periphery of the bearing ring. It is desired that it be held in an annular chamber formed between alternating lateral diameter steps of the rotating mass and the bearing ring. These steps on opposite sides of one component and the other component are -
It is easy to manufacture because it does not require the formation of grooves. On the other hand, it is no longer necessary for the molded ring inserted under prestress to be forced through a groove edge provided in the component, which would always mean the risk of damaging the ring part. This made assembly easier.

In the exemplary drawings, the bearing arrangement is designated as a whole by the reference numeral 1;
Reference numeral 2 designates a drive or guide shaft with an eccentric pin 3 for a rotating mass constituted by a rotary plate of the pushing machine. This type of push-off machine is used, for example, in patent N 3519981 filed earlier in the Federal Republic of Germany.
Details are given in the specification.

The rotary plate 4 is supported on the eccentric pin 3 of the drive shaft or guide shaft 2 by means of a bearing 7 held in a bearing sleeve 8 constructed in the form of a socket, with a bearing ring 5 housed in a bearing eye 6 interposed therebetween. ing. As proposed in another invention previously filed in the Federal Republic of Germany, the socket-shaped bearing sleeve 8 accommodated in the bore 11 of the bearing ring 5 can be fitted in the closed bottom area, for example with a needle bearing. It has a lubricating medium storage chamber 9 for lubricating a bearing 7 configured as a bearing. Reference numeral 10 is an eccentric bin 3
1Fr: shows a seal arranged between the eccentric pin 3 and the bearing ring 5 on the side of the open end of the surrounding bearing sleeve 8;

A rubber elastic molded ring 20f is provided between the inner circumference 16 of the rotating plate 4 and the outer circumference 12 of the bearing ring 5.

A rectangular annular chamber 21 in cross section is provided for accommodating it. In this embodiment, the molded ring has a cross-sectional shape consisting of three circles connected by axis-parallel webs.

This configuration of the molded body ensures an increasing radial spring coefficient for the molded ring 20, with an increase in the radial load and a further increase in the spring stiffness. However, instead of the shaped body cross-section as described above, other cross-sectional shapes are also conceivable, resulting in a spring coefficient that increases in the radial direction.

The annular chamber 21, which has a rectangular cross-sectional shape and is formed between the rotary plate 4 and the bearing ring 5, has a diameter step 18, 19 or 14.15. In this way, since only one step is provided for a component, the machining of the component for this structure can be carried out in one working step. Therefore, special groove formation is no longer necessary. At the same time, this configuration has a rubber-elastic molded ring 20 which in the starting state has an inner diameter smaller than the outer circumference 12 of the bearing ring 5.
The assembly of the bearing device 1 is facilitated by the fact that the force ζ is, for example, first pushed onto the outside @12 of the bearing ring 5. The molded ring 20 is stretched onto the bearing ring 5 while being preloaded in the radial direction. A chamfered portion 13 formed on the end surface of the bearing ring 5 on the side opposite to the diameter step 14.degree. 15 facilitates the tensioning of the molded ring 20. After the shaped ring 20 has been fitted onto the outer periphery 12 with a reed that rests on the shoulder of the diameter step 15 of the bearing ring 5, the bearing ring 5 thus prepared is pushed into the bearing eye 6 of the rotary plate 4 and, in particular, It is pushed in from the end face of the rotary plate 4 on the opposite side to the diameter step 18, 19. The inner circumference 16 has a chamfered portion 1 on this end surface.
7, the chamfered portion 17 compresses the molded ring 20 in the radial direction and brings it into contact with the ring shoulder of the diameter step 19, and the bearing ring 5 with the molded ring 20
It makes it easy to push.

After the assembly carried out in this way, the im-elastic molding ring arranged between the bearing ring 5 and the rotating plate 4 is radially prestressed. The magnitude of this preload is such that the relative deviation in the axial and circumferential direction between the bearing ring 5 and the rotary plate 4 due to the loads occurring during operation of the displacement machine, on the one hand, and the forming ring on the other hand, We want it to be eliminated by a frictional connection with the rotating plate or bearing ring.

Additional means for fixing the bearing ring axially or circumferentially with respect to the rotating plate are therefore no longer necessary.

[Brief explanation of drawings]

The drawing shows a longitudinal section through an eccentric bearing arrangement of a rotating mass according to an embodiment of the invention. 1... Bearing device, 2... Drive shaft or guide shaft, 3...
- Eccentric bottle, 4... Rotating plate (rotating mass body), 5... Bearing ring, 6... Bearing eye, 1... Bearing, 8...
Bearing sleeve, 9... Lubricating medium storage chamber, 10... Packing, 11... Hole, 12... Outer periphery, 13... Chamfered portion, 14.15... Diameter step, 16...・Inner circumference, 1
7... Chamfered part, 18.19... Diameter step, 20...
- Molding ring, 21... annular chamber.

Claims (2)

[Claims] 1. An eccentric drive for a rotating mass, comprising a drive acting on at least one point of the rotating mass and configured as a first eccentric;
a guiding device constituted by a second eccentric device acting on at least one further point spaced apart from said point of application; of the type in which the bearing arrangement has an elastic bearing bearing consisting of a rubber-elastic molded ring supported between the bearing ring of the bearing arrangement and the bearing eye of the rotating mass, The frictional force formed between the molded ring (20) and the bearing ring (5) or the rotating mass (4) is due to the load generated during the movement between the bearing ring (5) and the rotating mass (4). Eccentric drive for a rotating mass, characterized in that a shaped ring (20) is inserted under such a radial preload that avoids relative displacements in the axial or circumferential direction at Device. 2. A molded ring (20) connects the rotating mass (4) and the bearing ring between the inner circumference (16) of the bearing eye (6) of the rotating mass (4) and the outer circumference (12) of the bearing ring (5). (5)
Diameter steps (14, 15;
2. Eccentric drive according to claim 1, wherein the eccentric drive device is held in an annular chamber (21) formed between the eccentric drive devices (18, 19).