VIBRATION ABSORBER WITH DOUBLE MASS

Abstract

A vibration absorber includes a carrier plate having two sides and a bore, a mass element provided on each of the two sides of the carrier plate to form a mass pair, and a connecting bolt. The connecting bolt projects through the bore and projects on both sides of the carrier plate into the mass elements to fix or connect the mass element on each side of the carrier plate on or to the carrier plate.

Claims

1. A vibration absorber, comprising: a carrier plate having two sides, the carrier plate including a bore, a mass element on each of the two sides, the mass element on each of the two sides forming a mass pair, and a connecting bolt, wherein the connecting bolt projects through the bore on each of the two sides of the carrier plate and into the mass element on each of the two sides of the carrier plate to form a respective holding connection to fix or connect the mass elements on or to the carrier plate.

2. The vibration absorber according to claim 1, wherein the holding connections are screw connections, latched connections and/or press-fit connections.

3. The vibration absorber according to claim 1, wherein a spring device is arranged between each mass element of the mass pair and the carrier plate.

4. The vibration absorber according to claim 3, wherein the spring device comprises a spring washer.

5. The vibration absorber according to claim 3, wherein the spring devices each have a spring bore that rests in a radially centred manner against the connecting bolt, or the spring bores each have a supporting flange on an inner circumference that rests in a radially centred manner against the connecting bolt.

6. The vibration absorber according to claim 1, wherein the mass elements of the mass pair and/or the connecting bolt of the mass pair and/or the spring devices of the mass pair are designed and/or arranged mirror-symmetrically with respect to the carrier plate.

7. The vibration absorber according to claim 1, wherein the mass elements of the mass pair are designed without a through bore and/or each have a blind bore into which the connecting bolt projects.

8. The vibration absorber according to claim 1, wherein the carrier plate and/or the mass elements of the mass pair and/or the spring devices of the mass pair form/forms a closed interior space, in which the connecting bolt is arranged.

9. The vibration absorber according to claim 6, wherein the mass elements of the mass pair are designed and/or arranged rotationally symmetrically with respect to the corresponding connecting bolt.

10. The vibration absorber according to claim 1, wherein the connecting bolt of the mass pair has a positioning shoulder for each mass element of the mass pair.

11. The vibration absorber according to claim 1, wherein a second mass element is arranged on each of the two sides of the carrier plate, the second mass elements forming a second mass pair.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0038] FIG. 1 shows an exploded illustration of a vibration absorber according to aspects and teachings of the disclosure;

[0039] FIG. 2 shows the vibration absorber according to FIG. 1 in a sectional view, and

[0040] FIG. 3 shows a detail view from FIG. 2.

DETAILED DESCRIPTION

[0041] In the figures, elements which are identical or correspond to one another are each designated by the same reference signs and are therefore not described again, unless it is expedient to do so. Features already described are not described again in order to avoid repetitions and they are applicable to all elements with the same or mutually corresponding reference signs, unless explic-itly excluded. The disclosures contained in the description as a whole can be applied analogously to identical parts with the same reference signs or the same component designations. The position information chosen in the description, such as, for example, top, bottom, side, etc. also relates to the directly described and illustrated figure and should be applied mutatis mutandis to the new position in the event of a change in position. Furthermore, individual features or combinations of features from the different exemplary embodiments shown and described can also represent independent solutions that are inventive or according to aspects and teachings of the disclosure.

[0042] FIG. 1 shows an exploded illustration of the individual components of a vibration absorber 2, this vibration absorber 2 being shown after assembly in FIG. 2.

[0043] The vibration absorber 2 comprises a carrier plate 4 which has two sides 6 that face in opposite spatial directions. The carrier plate 4 comprises an attachment geometry 7 (not designated specifically) for attaching the vibration absorber 2 to a component to be damped. In addition, the carrier plate 4 comprises two bores 8, 10, which lead from one side 6 of the carrier plate 4 to the other side 6 of the carrier plate 4, that is to say are through bores. The two bores 8, 10 are formed in a flat carrier section 11 of the carrier plate 4.

[0044] The vibration absorber 2 also comprises two mass pairs 14, 18. Each of the mass pairs 14, 18 comprises two mass elements 12, 16, which are absorber masses. One of the mass elements 12, 16 of each of the mass pairs 14, 18 is arranged on one of the two sides 6. The mass elements 12, 16 of the adjacent mass pairs 14, 18 are arranged fully spaced apart from one another. The mass elements 12, 16 each have a bore, which is designed as a blind bore 28, 30. In the present case, the four mass elements 12, 16 are identical. They are also designed and arranged mirror-symmetrically with respect to the carrier plate 4 or the carrier section 11. They are furthermore designed and arranged in a rotationally symmetrical manner (order=4) with respect to a corresponding connecting bolt 20, 22.

[0045] The vibration absorber 2 also comprises a one-piece connecting bolt 20, 22 for each of the two mass pairs 14, 18. In the assembled state, connecting bolt 20 projects through bore 8 of the carrier plate 4 and into blind bores 28 of mass elements 12. In the assembled state, connecting bolt 22 projects through bore 10 of the carrier plate 4 and into blind bores 30 of mass elements 16. The connecting bolts 20, 22 do not rest directly against the carrier plate 4 or touch it. In the blind holes 28, 30, the respective mass elements 12, 16, together with the respective connecting bolt 20, 22, form a holding connection in the form of a press-fit via holding sections 44. Thus, the mass elements 12, 16 are fixed on the carrier plate 4 by means of a single connecting bolt 20, 22 in each case. The connecting bolts 20, 22 are of identical configuration and are mirror-symmetrical with respect to their respective transverse centre plane Q and rotationally symmetrical in the mathematically broader sense with respect to their respective central longitudinal axis A. Each of the connecting bolts 20, 22 has a contact section 42 on both sides of its transverse centre plane Q, the said contact sections having the largest diameter. Adjoining this in the axial direction is a positioning shoulder 32. Adjoining this in the axial direction is the holding section 44. The connecting bolts 20, 22 of the mass pairs are designed and arranged mirror-symmetrically with respect to the carrier plate 4. Each of the positioning shoulders 32 has a contact surface 33 and is designed as a continuous diameter step arranged on the outer circumference. The contact surface 33 of the positioning shoulder 32 faces the corresponding mass element 12, 16, wherein the mass element 12, 16 rests against this positioning shoulder 32. It can be seen that each holding section 44 has longitudinal structures in the form of longitudinal teeth 46. These longitudinal teeth 46 press into the material of the respective mass element 12, 16 to provide non-positive and positive engagement. Adjacent longitudinal teeth 46 are spaced apart in the circumferential direction by longitudinal grooves.

[0046] The vibration absorber 2 furthermore comprises a spring device in the form of a spring washer 24, 26 for each mass element 12, 16 of the two mass pairs 14, 18. The spring washers 24, 26 are separate parts and are arranged without material bonding. The spring washers 24, 26 are arranged between the corresponding mass element 12, 16 and the carrier plate 4. Therefore, the mass elements 12, 16 do not rest against or touch the carrier plate 4. The spring washers 24, 26 each have a bore 36, 38, through which the corresponding connecting bolt 20, 22 extends. The bores 36, 38 of the spring washers 24, 26 each have a supporting flange 40 on the inner circumference, which rests in a radially centred manner against the connecting bolt. The spring washers 24, 26 of each mass pair 14, 18 are of identical design and are designed and arranged mirror-symmetrically with respect to the carrier plate 4 or the carrier section 11. However, each mass pair 14, 18 has different spring washers 24, 26. More specifically, the two spring washers 24 of mass pair 14 have a smaller outside diameter than the two spring washers 26 of mass pair 18. As a result, the mass pairs 14, 18 damp different frequencies. The spring washers 24, 26 each have an inside diameter which is smaller than the diameter of the bores 8, 10 of the carrier plate 4. The spring washers 24, 26 therefore project into the bores 8, 10, since they are preloaded by the mass elements 12, 16 in such a way that they are elastically deformed into the respective bores 8, 10 in the region of the inside diameter. As a result, positive engagement can occur between a bore edge 48 of the respective bore 8, 10 and the respective spring washer 24, 26.

[0047] The carrier plate 4, the mass elements 12, 16 of each mass pair 14, 18 and the spring washer 24, 26 of each mass pair 14, 18 form an interior space 34 which is closed off from the environment. The respective connecting bolt 20, 22 is arranged in the interior space 34.

[0048] The invention is not limited to one of the above-described embodiments but can be modi-fied in a variety of ways. All of the features and advantages emerging from the claims, the description and the drawing, including structural details, spatial arrangements and method steps, may be essential to the invention both individually and in a wide variety of combinations.

[0049] All combinations of at least two of the features disclosed in the description, the claims and/or the figures fall within the scope of the invention.

[0050] In order to avoid repetitions, features disclosed in terms of a device are also to be regarded as disclosed and claimable in terms of a method. Likewise, features disclosed in terms of a method are to be regarded as disclosed and claimable in terms of a device.