Damper device

Abstract

The invention relates to a damper device (1) having at least one damper disc (2a, 2b, 2c) and at least one hub (3) and having a friction mechanism (7), the damper disc (2a, 2b, 2c) and the hub (3) being oriented concentrically with respect to a central axis (11) of the damper device (1), the central axis (11) extending axially in two opposite axial directions (A, B), the damper disc (2a, 2b, 2c) having radially extending elastic spokes (5), the spoke (5) is connected radially internally to the hub (3), the spoke (5) is connected radially externally to at least one annular damping mass (6), and the friction means (7) is formed by at least one spring (7e, 7f) which is elastically preloaded relative to at least one friction surface (7c, 7d) of the friction pad (8a, 8b).

Description

Technical Field

[0001] This invention relates to a vibration damper device that implements a spoke-type vibration damper. Background Technology

[0002] A vibration damper device is known from CN219795972U. This device comprises a disc assembly with multiple axially adjacent damper discs and a friction mechanism. The friction mechanism consists of a saddle-shaped support body, with one support disc axially positioned on one side of the disc assembly and another support disc axially positioned on the other side. The support discs are radially hooked together at their edges via tabs and held axially abutting each other. Disc springs are spring-elastically clamped between the respective support discs and the axially outer damper discs, such that the disc springs are held against the respective outer damper discs by a steel-to-steel frictional connection. The prestress of the disc springs can be set by means of the tabs through the axial spacing between the support discs. Summary of the Invention

[0003] The purpose of this invention is to improve the function of the vibration damper device.

[0004] This objective is achieved by the subject matter of claim 1.

[0005] According to the present invention, the friction mechanism has at least one friction disc including a friction surface. Here, the friction surface is formed on at least one friction pad. The friction pad is made of at least one paper-based material. The friction pad can be implemented as a single layer or multiple layers.

[0006] The manufacturing process of paper gaskets is similar to that of paper. Paper-based materials are preferably suited for so-called wet applications, where the damper unit is intended to operate in oil or oil mist. Alternatively, they are also used in dry applications, where lubricant is added to the friction contact points if necessary. Paper gaskets withstand high surface pressures.

[0007] The friction mechanism has at least one friction disc, preferably two. One or more springs of the friction mechanism and a corresponding damper disc are held adjacent to each other. "Adjacent to each other" is understood to mean fixed or alternatively axially movable on at least one fixed element. The spring or corresponding spring is axially supported or held on the damper disc and is elastically preloaded axially relative to the friction surface of the friction pad fixed on the friction disc. The spring can optionally be at least one disc spring, a group of disc springs, or a diaphragm spring.

[0008] Wheel spoke dampers require a base friction mechanism that provides a constant coefficient of friction in the engine compartment under ambient temperatures of 100°C and oil mist. The friction mechanism ensures a certain base friction force, thereby preventing the vibration of the damper disc from becoming uncontrollable and causing damage to the damper assembly. Preferably, the friction mechanism consists of two friction discs, one axially on the left and the other axially on the right, connected to an axially adjacent damper disc, or preferably a group of discs. Each friction disc is assigned at least one friction pad with at least one friction surface, wherein the corresponding friction surface is constructed on a friction pad made of paper. A frictional connection exists between the respective friction disc and a spring elastically preloaded relative to the friction pad, via which the damping mass or the vibration of the damper disc is uniformly maintained and braked by friction, preferably by sliding friction, under the influence of a lubricant.

[0009] The vibration damper assembly has preferably multiple damper discs arranged side-by-side along the axial direction and preferably frictionally connected to each other. The damper discs may be identical in structure and made of the same material, or they may differ in design and / or material. Each damper disc may have its own hub and / or be fixed to one or more separate hubs. The damper discs may selectively have the same natural frequency as each other, or at least one damper disc may have a different natural frequency than the others.

[0010] One design of the invention involves a shock absorber disc being secured to a wheel hub by at least one first fastener. The fastener is preferably a plurality of bolts or pins arranged circumferentially around the central axis of the shock absorber assembly. The fastener is preferably a rivet or a bolt conforming to a rivet, with at least one end capable of being struck or pressed against the rivet head. Furthermore, it is conceivable to use all fasteners capable of connecting two or more disc-shaped structural elements to each other. Additionally, the shock absorber disc is held abutted and connected to each other by one, preferably a plurality of, second fasteners arranged circumferentially around the central axis. The perforated disc for the first fastener surrounds a central axis having a radius smaller than that of the perforated disc of the radially outward-facing fastener.

[0011] According to the present invention, the first fastener is used to fix the friction disc to the damper disc or the disc assembly of the damper discs, and the second fastener is used to fix or retain the spring on one or more damper discs.

[0012] Finally, the present invention proposes a vibration damper device having a plurality of damper discs. The damper discs are arranged side-by-side axially and are securely pre-tensioned relative to each other and held abutting each other axially by means of rivets. The vibration damper device also has a friction mechanism comprising two friction discs and at least two springs. The springs may be identical in design, material, or characteristic curves. At least one first friction pad is fixed to a first friction disc. At least one second friction pad is fixed to a second friction disc. The composition, size, and friction characteristics of the friction pads may be identical or the friction discs may differ from each other.

[0013] One embodiment of the invention involves a paper-based material or a combination of paper-based materials that is compatible with oil, such as engine oil or transmission fluid. The friction pad is a fluid reservoir for storing and releasing oil. The paper-based material is porous and expandable, allowing it to absorb, store, and release oil through dripping or spraying under centrifugal force or pressure. Pressure is generated by the prestress of the abutting spring. The oil cools, lubricates, and reduces wear during frictional contact. The oil output from the friction pad to the contact surface between the corresponding spring and the friction pad preferably induces sliding friction in the frictional contact, preferably at a friction value / coefficient of friction of 0.15 to 0.2 μ.

[0014] The friction pad has a small weight and requires almost no axial structural space, especially when the axial thickness of the friction pad is less than or equal to 1 mm, preferably 0.56 mm, according to one design according to the invention.

[0015] A first friction disc is fixed to a first side of the damper assembly facing the first axial direction, next to a first damper disc. The first damper disc defines a disc assembly along the first axial direction. A second friction disc is fixed to a side of a third damper disc on a side of the damper assembly opposite to the first axial direction. The third damper disc defines a disc assembly along an axial direction opposite to the first axial direction. At least one or more second damper discs are arranged axially side-by-side between the first and third damper discs. The first friction disc is shaped such that a first axial gap is formed between the first damper disc and the first friction pad. The second friction disc is shaped such that a second axial gap is formed between the third damper disc and the second friction pad. At least one first spring held on the damper disc engages radially into the first axial gap, such that a radially annular section of the first spring is axially arranged between the first friction surface and the first damper disc and is pre-tensioned axially relative to the first friction surface of the first friction pad on the first friction disc in the first gap. At least one second spring, held on the damper disc, engages axially into a second axial gap, such that a radial annular segment of the second spring is axially arranged between the second friction surface and the second damper disc and is pre-tensioned axially relative to the second friction surface of the second friction pad on the second friction disc within the second gap. The friction discs may be constructed identically or have different designs. The friction surfaces or friction pads may be identical or different from each other. Attached Figure Description

[0016] The present invention will now be explained in detail with reference to embodiments. The accompanying drawings are not to scale. The drawings are as follows:

[0017] Figure 1 An embodiment of the shock absorber device is shown in a longitudinal section along the central axis 11.

[0018] Figure 2a and Figure 2b Schematic diagrams showing the same detail of the connection between the shock absorber discs (2a, 2b, 2c) and the wheel hub 3 from different perspectives, and

[0019] Figure 3 An overall view of the damper discs 2a or 2b inserted into the two damper devices 1 is shown. Detailed Implementation

[0020] Figure 1– The damper device 1 includes a disc assembly 2 consisting of damper discs 2a, 2b, and 2c, a hub 3, and a friction mechanism 7. The disc assembly 2 consists of an external damper disc 2a, multiple damper discs 2b, and an external damper disc 2c. The friction mechanism 7 includes a first friction disc 7a and a second friction disc 7b. On the first friction disc 7a, a first friction surface 7c is formed on a first friction pad 8a, and on the second friction disc 7b, a second friction surface 7d is formed on the second friction pad 8b.

[0021] The first friction disc 7a is arranged on the first side 1a of the damper assembly 1, wherein the first side 1a faces the axial direction marked by the directional arrow A and is fixed to the disc assembly 2. The first friction disc 7a has two annular disc sections 7a' and 7a''. The radially inwardly built-in annular disc section 7a' rests flat against the damper disc 2a and is the fixing section for fixing the first friction disc 7a to the disc assembly 2. The second annular disc section 7a'' follows the bend of the first friction disc 7a'' in the radial direction and extends parallel to the contour of the damper disc 2a with a gap, such that an axial gap 15 is formed in the region between the first friction disc 7a and the first damper disc 2a. The axial gap 15 is an annular gap and extends circumferentially around the central axis 11. The first friction surface 7c on the first friction pad 8a faces the first damper disc 2a across the axial gap 15 and is axially opposite to the first damper disc 2a.

[0022] The second friction disc 7b rests against the side of the damper device 1 facing the axial direction B marked by the directional arrow, and rests laterally against the third damper disc 2c, and is fixed to the damper discs 2a, 2b, and 2c by rivets 14. The second friction disc 7b has two annular disc sections 7b' and 7b'". The radially built-in annular disc section 7b' rests flat against the damper disc 2c and is the fixing section for securing the second friction disc 7b to the disc assembly 2. The second annular disc section 7b' follows the bend 7b'' of the second friction disc 7b radially outward and extends parallel to the contour of the damper disc 2c with a gap, such that an axial clearance 15 is formed in the region between the second friction disc 7b and the second damper disc 2b. The axial clearance 15 extends annularly around the central axis 11. The second friction surface 7d on the friction pad 8b faces the third damper disc 2c across the axial clearance 15 and is positioned axially across the axial clearance 15 opposite to the third damper disc 2a.

[0023] The damper discs 2a, 2b, and 2c are held and fixed axially close together by a second fastener 12, which is composed of rivets 13. Furthermore, springs 7e and 7f are fixed to the disc assembly 2 by means of rivets 13. On a radially outward-facing perforated disc with radius R1, the rivets 13 are distributed around the circumference of the central axis 11. The first fasteners 9, configured as rivets 14, are distributed around the circumference of the central axis 11 on a radially inward-facing perforated disc with radius R2. Radius R1 is greater than radius R2 (see also...). Figure 3 Therefore, the perforated disk with springs 7e and 7f fixed is located radially outside, and the perforated disk with friction disks 7a and 7b fixed is surrounded by the perforated disk with springs 7e and 7f fixed.

[0024] Figure 1 , 2a and Figure 2b – The first spring 7e engages radially from the outside to the inside into the axial clearance 15 and is pre-tensioned against the first friction surface 7c of the friction pad 8a. The second spring 7f engages radially from the outside to the inside into the axial clearance 15 and is pre-tensioned against the second friction surface 7d of the friction pad 8b. The damper discs 2a, 2b, 2c and the friction discs 7a and 7b are fixed to the hub 3 by a first fastener 9, which is composed of rivets 14.

[0025] Figure 3 - Damper discs 2a, 2b, and 2c have elastic spokes 5 extending radially from the inside to the outside. The spokes 5 are radially internally connected to a disc-shaped hub 4, which is constructed as a single piece with the spokes 5. Furthermore, the spokes 5 are radially externally connected to a damping mass 6 constructed in the shape of a tire. The damping mass 6 has a through-hole 6a located on a perforated disc C1 with a radius R1 and used for... Figure 1 As shown in Figure 2, it is riveted to rivet 13. The hub 4 is provided with a... Figures 1 to 3 The rivet 14 shown has a through hole 4a, which is located on a perforated disk C2 with a radius R2.

[0026] List of reference numerals

[0027] 1. First shock absorber device

[0028] 1a First side of the first shock absorber device

[0029] 1b The second side of the first shock absorber device

[0030] 2. Disc assembly consisting of shock absorber discs

[0031] 2a First damper disc

[0032] 2b Second damper disc

[0033] 2c Third shock absorber disc

[0034] 3 hubs

[0035] 4. Damping mass of the wheel hub

[0036] 4a through hole

[0037] 5 spokes

[0038] 6. Vibration damping mass

[0039] 6a Through Hole

[0040] 7 Friction Mechanism

[0041] 7a First friction disc of the friction mechanism

[0042] 7a' First annular section of the first friction disc

[0043] 7a” Second annular section of the first friction disc

[0044] 7a”' The curved part of the first friction disc

[0045] 7b The second friction disc of the friction mechanism

[0046] 7b' The first annular section of the second friction disc

[0047] 7b” Second annular section of the second friction disc

[0048] 7b”' The curved part of the second friction disc

[0049] 7c First friction surface of the friction mechanism

[0050] The second friction surface of the 7d friction mechanism

[0051] 7e The first spring of the friction mechanism

[0052] 7f The second spring of the friction mechanism

[0053] 8a First friction pad made of paper

[0054] 8b Second friction pad made of paper

[0055] 9 First fastener

[0056] 10 Not specified

[0057] 11. Central axis of the vibration damper device

[0058] 12 Second fastener

[0059] 13 Rivets

[0060] 14 Rivets

[0061] 15 Axial clearance

[0062] A First axial direction

[0063] B Second Axial Direction

[0064] C1 Radial outward-facing perforated disk

[0065] C2 Radial built-in perforated disk

[0066] R1 is the radius of the radially external perforated disk.

[0067] R2 is the radius of the radially built-in perforated disk.

Claims

1. A shock absorber device (1), the shock absorber device having at least one shock absorber disc (2a, 2b, 2c), at least one hub (3), and a friction mechanism (7), wherein, - The damper discs (2a, 2b, 2c) and the hub (3) are concentrically oriented about the central axis (11) of the damper device (1). -The central axis (11) extends axially in two opposite axial directions (A, B). - The damper discs (2a, 2b, 2c) have radially extending elastic spokes (5), -The spokes (5) are radially internally connected to the hub (3), -The spokes (5) are radially externally connected to at least one annular damping mass (6), - The radial direction extends in any transverse direction perpendicular to the central axis (11). - The friction mechanism (7) consists of at least one spring (7e, 7f) that is elastically preloaded relative to at least one friction surface (7c, 7d). Characterized by the fact that the friction mechanism (7, 8) has at least one friction disk (7a, 7b) including the friction surfaces (7c, 7d), wherein, - The springs (7e, 7f) and at least one of the damper discs (2a, 2b, 2c) abut against each other. - The springs (7e, 7f) are elastically preloaded along the axial direction and abut against the friction surfaces (7c, 7d), which are fixed to the friction discs (7a, 7b). - The friction discs (7a, 7b) and the damper discs (2a, 2b, 2c) abut against each other. - and the friction surfaces (7c, 7d) are constructed on at least one friction pad (8a, 8b), wherein the friction pad (8a, 8b) is made of at least one paper-based material.

2. The vibration damper device (1) according to claim 1, characterized in that, The friction mechanism (7) has at least one first spring (7e) and at least one second spring (7f), at least one first friction surface (7c) with at least one first friction pad (8a), and at least one second friction surface (7d) with at least one second friction pad (8b), wherein, - The first spring (7e) is preloaded relative to the first friction pad (8a) on a first side (1a) of at least one of the damper discs (2a, 2b). - The second spring (7f) is preloaded relative to the second friction pad (8b) on the second side (1b) of at least one damper disc (2a, 2b, 2c). - The first side (1a) faces the first axial direction (A) and the second side (1b) faces the second axial direction (B) opposite to the first axial direction (A).

3. The vibration damper device (1) according to claim 1 or 2, characterized in that, The damper device (1) has a plurality of damper discs (2a, 2b, 2c), and the friction mechanism (7) is provided with a first friction pad (8a) and a second friction pad (8b), wherein - The first friction pad (8a) is fixed on the first friction disk (7a) and the second friction pad (8b) is fixed on the second friction disk (7b). - The first friction disc (7a) is arranged on the first side (1a) of the damper device (1) facing the axial direction (A) on the side of the first damper disc (2a). - The second friction disc (7b) is arranged on the second side (1b) of the damper device (1) facing the axial direction (B) on the side of the third damper disc (2c).

4. The vibration damper device (1) according to claim 3, characterized in that, The first friction pad (8a) is positioned axially opposite to the first damper disc (2a), and the second friction pad (8b) is positioned axially opposite to the third damper disc (2c).

5. The vibration damper device (1) according to claim 3 or 4, characterized in that, The damper discs (2a, 2b, 2c) and the friction discs (7a, 7b) are fixed to the hub (3) by means of at least one fastener (9).

6. The vibration damper device (1) according to claim 5, characterized in that, The fastener (9) is at least one rivet (14), wherein, preferably, a plurality of rivets (14) are arranged in a circumference around the central axis (11).

7. The damper device (1) according to any one of claims 1 to 6, characterized in that, The friction pads (8a, 8b) are fixed to the friction discs (7a, 7b) by means of at least one adhesive.

8. The damper device (1) according to any one of claims 1 to 7, characterized in that, The friction pads (8a, 8b) are fluid reservoirs for storing and releasing oil.

9. The damper device (1) according to any one of claims 1 to 8, characterized in that, The axial thickness of the friction pads (8a, 8b) is less than or equal to 1 mm, preferably 0.56 mm.

10. The damper device (1) according to the preamble of claim 1, characterized in that, -The vibration damper device (1) has multiple vibration damper discs (2a, 2b), and - The first friction mechanism (7) is provided with a first friction disk (7a) and a second friction disk (7b). - A first friction surface (7c) is fixed on the first friction disk (7a), and a second friction surface (7d) is fixed on the second friction disk (7b). - The friction surfaces (7c, 7d) are respectively constructed on the friction pads (8a, 8b). - The corresponding friction pads (8a, 8b) are made of at least one paper-based material. - The first friction disc (7a) is fixed to the first side (1a) of the damper device (1) on the side of the first damper disc (2a) of the damper discs (2a, 2b, 2c) facing the axial direction (A). - A first axial gap (15) is formed between the first damper disc (2a) and the first friction pad (8a) of the friction pads (8a, 8b). - The first springs (7e, 8e) held on the damper discs (2a, 2b, 2c) engage in the first axial clearance (15) and are pre-tightly pressed against the first friction pad (8a). - The second friction disc (7b) is fixed to the second side (1b) of the damper device (1) on the side of the third damper disc (2c) of the damper discs (2a, 2b, 2c), facing the axial direction (B). - A second axial clearance (15) is formed between the third damper disc (2c) and the second friction pad (8b). - The second spring (7e, 8f) held on the damper disc (2a, 2b, 2c) engages in the second axial gap (15) and is pre-tightly pressed against the second friction pad (8b).

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