Vibration damper unit
By connecting the stop cover element to the base adjustment device in the vibration damper unit and adjusting the distance of the additional spring, the problem of spring failure during vehicle loading is solved, and the vehicle height and comfort are maintained while the stiffness is dynamically adjusted.
Patent Information
- Application Number
- CN202520205815.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2024-02-13
- Filing Date
- 2025-02-10
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2035-02-10
AI Technical Summary
When existing vibration damper units are loaded into a vehicle, the springs are compressed, causing the vehicle height to decrease. Furthermore, the spring preload distance is designed for the unloaded state, which may lead to failure under dynamic loads.
By connecting or linking the stop cover element to the base adjustment device, the distance between the additional spring and the stop cover element is adjusted, the maximum spring travel of the spring is limited, and the adjustment is made independently of the vehicle load condition.
To prevent premature spring failure, maintain vehicle height and comfort, reduce vibration, and adapt stiffness adjustments to different load conditions.
Smart Images
Figure CN223635232U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a vibration damper unit according to the first and seventh aspects of the utility model. BACKGROUND
[0002] A vibration damper unit is known from the prior art, which comprises a damper having a stop cover element arranged fixedly on an end face. It further comprises a base adjustment device, a bearing arranged opposite the base adjustment device along a longitudinal axis, a spring supported at one end on the base adjustment device and at the other end on the bearing, and an additional spring. The additional spring is arranged between the base adjustment device and the bearing and is arranged opposite the stop cover element along the longitudinal axis.
[0003] Loading a vehicle with such a vibration damper unit results in the spring being compressed and the height of the vehicle being reduced. By adjusting the base of the compressed spring, the original height of the loaded vehicle can be restored. However, this also restores the original distance between the additional spring and the stop cover element (additional spring travel), which determines the maximum spring travel. This distance between the additional spring and the stop cover element is actually designed for an unloaded vehicle. However, the spring, which is pre-tensioned depending on the load, is assigned a maximum spring travel, which is designed for a completely different load state, for example an unloaded state.
[0004] In this state, the spring is already pre-tensioned due to the load. If now a further dynamic load is added, which is of the same spring travel as before the base adjustment, for example during driving, the spring can fail. There is therefore a problematic difference in the situation between the distance between the additional spring and the stop cover element and the spring pre-tensioning. SUMMARY
[0005] It is therefore the task of the utility model to provide a vibration damper unit which improves the prior art in this respect.
[0006] According to the utility model, a vibration damper unit is proposed, a longitudinal axis passing through the vibration damper unit, comprising a damper having a stop cover element arranged on an end face, a base adjustment device, a bearing arranged opposite the base adjustment device along the longitudinal axis, a spring supported at one end on the base adjustment device and at the other end on the bearing, and an additional spring arranged between the base adjustment device and the bearing and arranged opposite the stop cover element along the longitudinal axis, wherein the stop cover element is connected, connectable, coupled or couplable to the base adjustment device.
[0007] It has been recognized that detaching the stopper cap element from the damper and assigning the stopper cap element to the base adjustment device can overcome the above-mentioned problems. The stopper cap element can be adjusted by the base adjustment device. The stopper cap element can be adjustably connected, connectable, coupled or couplable with the base adjustment device. The connection or connectability between the stopper cap element and the base adjustment device can be direct. The coupling or couplability between the stopper cap element and the base adjustment device can be indirect. The adjustment of the base adjustment device can move the stopper cap element and the additional spring relative to each other to adjust the additional spring travel and at the same time to adjust the spring travel. The additional spring can be, for example, an elastomeric additional spring, preferably made of microcellular polyurethane or compact elastomer.
[0008] By connecting, connectable, coupling or couplable the stopper cap element with the base adjustment device, two different aspects can be linked to each other, namely on the one hand the distance between the additional spring and the stopper cap element (additional spring travel) and on the other hand the spring pre-tension. The stopper cap element can be adjusted by the base adjustment device to a position corresponding to the spring pre-tension. The stopper cap element is movable relative to the damper or non-damper fixed.
[0009] Thus, the maximum spring travel can be limited to prevent large compression and premature failure. Furthermore, the stiffness curve can now be adjusted according to the vehicle height and load. Furthermore, the base adjustment does not lead to an increased load of the spring. The stopper cap element can now be adjusted independently of the load state of the vehicle. Furthermore, the vehicle occupants no longer lose comfort due to the load and the adjustable spring stiffness curve, since the vehicle vibrates less and remains connected to the ground.
[0010] According to one possible embodiment of the vibration damper unit, the additional spring can be fixedly connected with the carrier. Thus, the additional spring can be reliably fixed even when approaching or contacting or compressing the stopper cap element.
[0011] According to one possible embodiment of the vibration damper unit, the stopper cap element constitutes a stop for the additional spring.
[0012] According to one possible embodiment of the vibration damper unit, the stopper cap element can be arranged on an end face of a damper housing of the damper. Thus, the stopper cap element can be located opposite the additional spring.
[0013] According to one possible embodiment of the vibration damper unit, the adjustment path of the base adjustment device (for example with regard to direction and length) can be the same as the adjustment path of the stopper cap element. Thus, when the base adjustment is adjusted by a distance, the stopper cap element can also be adjusted by the same distance in the direction of the additional spring. Thus, the height of the vehicle can be raised by the base adjustment and at the same time the maximum spring travel can be appropriately limited.
[0014] According to one possible embodiment of the vibration damper unit, the adjustment path of the base adjustment device (for example with regard to the direction and the length) can be greater than the adjustment path of the stop cover element. Thus, when the base is adjusted by a distance, the stop cover element can also be adjusted by a part of this distance in the direction of the additional spring. In this case, the base adjustment device can for example first move along its own partial adjustment path while adjusting in the direction of the stop cover element. Then, it can be connected or coupled with the stop cover element and move a further partial adjustment path together with the stop cover element. Thus, the height of the vehicle can be raised by the base adjustment and at the same time the maximum spring travel is appropriately limited.
[0015] According to one embodiment of the vibration damper unit, it can comprise a connecting element which connects, connectable, couples or couplable the base adjustment device with the stop cover element. The connecting element can take into account the different positions of the base adjustment device and the stop cover element. The base adjustment device can be arranged at one end of the vibration damper unit. The spring can be supported there. On the other hand, the stop cover element can be arranged in the center of the vibration damper unit. There, it can interact with the additional spring. The connecting element serves to transfer the adjustment path from the base adjustment device to the stop cover element. Thus, both elements can remain in their usual position without having to take into account the possibility of connection or coupling.
[0016] According to one possible embodiment of the vibration damper unit, the connecting element can be guided axially and / or radially by the damper housing of the damper. This avoids the generation of noise, for example a clunk. Thus, additional guide parts can be dispensed with. A damper, for example an MCU damper or a rubber damper, can be arranged between the connecting element and the damper or the damper housing. This avoids the generation of noise, for example a clunk.
[0017] According to one possible embodiment of the vibration damper unit, the connecting element can be a hollow cylinder or a hollow cylinder segment of the base adjustment device and / or the stop cover element. Thus, the damper housing can be surrounded by the connecting element in a simple manner and in a space-saving manner.
[0018] According to one embodiment of the vibration damper unit, the connecting element can be formed by or fixedly connected with the base adjustment device and extend in the direction of the stop cover element. Alternatively, the connecting element can be formed by or fixedly connected with the stop cover element and extend from the stop cover element to the base adjustment device. Thus, the number of components can be reduced. It is conceivable that when the connecting element is formed by or connected with the base adjustment device or the stop cover element, it can rest loosely on the other of the base adjustment device or the stop cover element. Thus, one component can move a longer adjustment path than the other component.
[0019] According to one conceivable embodiment of the vibration damper unit, at least a part of the connecting element, the stop cover element and the base adjustment device can be formed integrally. This part of the base adjustment device can be the first or the second wall element. Thus, the number of components can be further reduced and a stop against spring-back can be formed. The spring-back prevention can act both inside the base adjustment device and on the end face of the damper and the stop cover element.
[0020] According to one possible embodiment of the vibration damper unit, the base adjustment device and / or the connecting element and / or the stop cover element can be designed such that in the retracted position of the base adjustment device, the stop cover element is axially spaced apart from the end face of the damper. Thus, in the retracted position of the base adjustment device, the stop cover element does not rest on the end face of the damper. This prevents the direct introduction of forces into the end face of the damper by the stop cover element, so that damage can be avoided.
[0021] It is conceivable that the mutual contact of the limit stops of the base adjustment device defines the axial distance between the stop cover element and the end face of the damper via the connecting element. Thus, in the case of avoidance of the end face of the damper, the pressure exerted on the stop cover element can be introduced into the limit stops of the base adjustment device via the connecting element. Thus, damage to the stop cover element and / or the connecting element can be avoided.
[0022] According to one possible embodiment of the vibration damper unit, the connecting element can be the only component connecting the base adjustment device with the stop cover element, so that further components can be dispensed with. The force chain can pass through the connecting element. Thus, the connecting element can be assigned to the base adjustment device or to the stop cover element, or can also be multipart, for example two-part, wherein one part can be assigned to the base adjustment device and the other part can be assigned to the stop cover element or can be fixedly connected or formed integrally therewith. In the latter case, the parts can extend into and be connected, connectable, coupled or couplable to each other, in particular loosely against each other.
[0023] According to one possible embodiment of the vibration damper unit, the connecting element can be formed integrally or fixedly connected with the base adjustment device and / or the stop cover element. If it is formed integrally or fixedly connected with one of the base adjustment device and the stop cover element, it can be loosely supported on the other component. Thus, a temporary adjustment movement can be transmitted to the other component, but a permanent forced coupling can be avoided. If the connecting element is formed integrally or fixedly connected with the base adjustment device and the stop cover element, it can extend between them and realize a permanent connection of the two components.
[0024] According to one embodiment of the vibration damper unit, the stop cover element can loosely rest on the connecting element and / or the damper. Thus, the stop cover element is not fixedly connected with the connecting element and / or the damper. The adjustment path of the base adjustment device (e.g. with regard to direction and length) can thus partly correspond to the adjustment path of the stop cover element. Thus, when the base is adjusted by a distance in the direction of the additional spring, the stop cover element can also be adjusted by at least a partly corresponding distance in the direction of the additional spring. Thus, the height of the vehicle can be raised by the base adjustment and at the same time the maximum spring travel is appropriately limited. For example, it is conceivable that the stop cover element loosely rests on an end face of the damper or the damper housing. When the base is adjusted in the direction of the additional spring, the stop cover element can be carried along by the connecting element, disengaged from the damper or the damper housing and approach the additional spring during the adjustment movement. If the base is now separated from the additional spring, the stop cover element can again rest on the end face of the damper or the damper housing.
[0025] According to one embodiment of the vibration damper unit, the stop cover element can be supported in axial direction by the connecting element and / or in radial direction by the connecting element and / or in radial direction by the damper. The support can be a plain bearing. Thus, additional components for axial bearings and / or radial support can be dispensed with in order to reduce the space requirement and the number of components. It is conceivable that one bearing ring or axial ribs are provided for the axial support and / or the radial support. The bearing ring and / or the axial ribs can be formed by or arranged on the stop cover element and / or the connecting element and / or the damper. The bearing ring provides an uninterrupted bearing / support over the circumference. In contrast, the axial ribs can be formed without undercuts and are suitable for being flowed through by a medium between the axial ribs for pressure equalization. The bearing ring and / or the axial ribs can prevent the stop cover element from tilting and jamming.
[0026] According to one embodiment of the vibration damper unit, a free travel can be formed between the stop cover element and the base adjustment device or the connecting element in an unloaded state of the vibration damper unit and / or in a retracted position of the base adjustment device. The free travel can exist in the retracted position of the base adjustment device. Thus, the stop cover element can be axially spaced apart from the base adjustment device or the stop cover element contact face of the base adjustment device or the connecting element or the stop cover element contact face of the connecting element. Thus, the stop cover element can only be carried along and adjusted in the direction of the additional spring after the connecting element or the base adjustment device has been moved by a distance corresponding to the free travel. Thus, the adjustment path of the stop cover element and the base adjustment device can be different. Thus, the geometry of the damper and the base adjustment device can be chosen independently of each other. Furthermore, the distance between the additional spring and the stop cover element can be adjusted by the length of the free travel. The "unloaded state" shall exist when the vibration damper unit is installed in a vehicle and is not under external load (e.g. loaded).
[0027] According to one possible embodiment of the vibration damper unit, the base adjustment device can be supported on the damper or the damper housing. It can be fixedly connected with the damper or the damper housing. Thus, it can adjust the base in the direction of the abutment.
[0028] According to one possible embodiment of the vibration damper unit, the base adjustment device can have limit stops which support the two wall elements against each other in the retracted position of the base adjustment device. It is conceivable that the limit stop of one wall element is formed as a cylinder or hollow cylinder and the limit stop of the other wall element is formed as an annular step. In the retracted position, the cylinder / hollow cylinder and the annular step can support each other.
[0029] According to one possible embodiment of the vibration damper unit, the stop cover element can loosely rest against the damper, the damper housing and / or the connecting element due to the effect of gravity.
[0030] According to one possible embodiment of the vibration damper unit, the stop cover element can be a separate component with respect to the damper, the damper housing, the connecting element and / or the base adjustment device. This makes it possible for the stop cover element to be used modularly.
[0031] According to one possible embodiment of the vibration damper unit, the spring can be a coil spring. This facilitates the best possible functioning of the vibration damper unit at low cost.
[0032] According to one possible embodiment of the vibration damper unit, the stop cover element can comprise one disc segment and one cylindrical sleeve segment. By means of the disc segment, it can rest against or contact, the sleeve segment can serve to guide and prevent tilting.
[0033] According to one possible embodiment of the vibration damper unit, the stop cover element can have a hole, for example in the disc segment. The damper rod of the damper can pass through the hole.
[0034] According to one possible embodiment of the vibration damper unit, the base adjustment device can comprise a first wall element and a second wall element axially spaced apart therefrom, wherein a chamber is formed between the wall elements which is at least partially delimited by an elastomer membrane. The first wall element can be fixed, for example on a fixed structure or the damper or the damper housing. The second wall element can be axially movable relative to the first wall element. The chamber can be selectively loaded by means of a fluid pressure or a gas pressure in order to separate the two wall elements from each other. A reduction in the fluid pressure or the gas pressure leads to the wall elements approaching until a retracted position is reached. The second wall element can support the spring. The second wall element can form or be fixedly connected with the connecting element.
[0035] According to the utility model, still propose a kind of vibration damper unit, longitudinal axis passes through the vibration damper unit, including a damper, the damper has the stop cover element arranged on end face, base adjusting device, support, spring, additional spring, the support is oppositely arranged with base adjusting device along longitudinal axis, the spring one end is supported on base adjusting device, the other end is supported on support, the additional spring is arranged between base adjusting device and support, and it is oppositely arranged with stop cover element along longitudinal axis, characterized in that, additional spring is connected, connectable, coupled or connectable with base adjusting device.
[0036] This vibration damper unit differs from the vibration damper unit mentioned at the beginning in that now the additional spring is connected, connectable, coupled or connectable with the base adjusting device instead of the stop cover element.
[0037] By connecting, connectable, coupling or connectable the additional spring with the base adjusting device, here too two different aspects can be related to each other, on the one hand the distance between the additional spring and the stop cover element, and on the other hand the spring pre-tension. The additional spring can be adjusted by the base adjusting device to a position corresponding to the spring pre-tension. The additional spring is movable relative to the damper or not damper-fixed, nor support-fixed. For this purpose, the additional spring is connected, connectable, coupled or connectable to the first or second wall element or coupled with the first or second wall element.
[0038] Thus, the maximum spring travel can be limited to prevent it from failing. In addition, it is now possible to adjust the stiffness depending on the vehicle height and load. In addition, the base adjustment does not result in an increased load on the spring. The additional spring and the additional spring travel can now be adjusted or set independently of the load state of the vehicle.
[0039] The embodiments described above with regard to the vibration damper unit are also to be regarded as a disclosure with regard to the vibration damper unit described here, as long as technically excluded. In this case, the additional spring and the stop cover element are to be regarded as an interchangeable disclosure.
[0040] According to one possible embodiment of the vibration damper unit, the stop cover element can be fixedly connected with the damper or the damper housing or formed by it.
[0041] According to one possible embodiment of the vibration damper unit, the additional spring can be fixedly connected with the base adjusting device, preferably with the first or second wall element.
[0042] According to one possible embodiment of the vibration damper unit, the damper or the damper housing can be supported on the support. The support can be fixedly connected with the damper or the damper housing. Thus, the base adjusting device can adjust the base in the direction of the support. BRIEF DESCRIPTION OF DRAWINGS
[0043] Further features, details and advantages of this invention can be derived from the following description of embodiments based on the accompanying drawings.
[0044] in:
[0045] Figure 1a A known vibration damper unit in an unloaded state is shown;
[0046] Figure 1b It shows Figure 1a The vibration damper unit is in a loaded state and the base has been adjusted.
[0047] Figure 2a The vibration damper unit in an unloaded state is shown;
[0048] Figure 2b It shows Figure 2a The vibration damper unit is in a loaded state and the base has been adjusted.
[0049] Figure 3a Another vibration damper unit in an unloaded state is shown;
[0050] Figure 3b It shows Figure 3a The vibration damper unit is in a loaded state and the base has been adjusted.
[0051] Figure 4 Another vibration damper unit is shown in a loaded state with its base adjusted;
[0052] Figure 5 Another vibration damper unit in an unloaded state is shown; and
[0053] Figure 6 Another vibration damper unit in an unloaded state is shown.
[0054] List of reference numerals
[0055] 10 Vibration Damper Units
[0056] 11 Vibration damper unit
[0057] 12 Dampers
[0058] 14 Stop cover components
[0059] 16. Base adjustment device
[0060] 18 supports
[0061] 20 Springs
[0062] 22 Additional Spring
[0063] 24 damper housing
[0064] 26 connecting element
[0065] 26a part
[0066] 26b part
[0067] 28 first wall element
[0068] 30 support ring
[0069] 32 second wall element
[0070] 34 chamber
[0071] 36 elastomer membrane
[0072] 38 damper rod
[0073] 40 axial rib
[0074] 42 stop cover element contact surface
[0075] 44 structure
[0076] 46 stopper
[0077] 48 stopper
[0078] 50 disc segment
[0079] 52 sleeve segment
[0080] 110 vibration damper unit
[0081] 112 damper
[0082] 114 stop cover element
[0083] 116 base adjustment device
[0084] 118 bearing
[0085] 120 spring
[0086] 122 additional spring
[0087] A axial direction
[0088] b path
[0089] F free travel
[0090] L longitudinal axis
[0091] N zero point
[0092] s pre-tension path
[0093] Xmax Maximum spring travel Detailed Implementation
[0094] In the accompanying drawings, identical or corresponding elements are denoted by the same reference numerals, and therefore will not be repeated unless necessary. Features already described will not be repeated to avoid repetition and apply to all elements with the same or corresponding reference numerals, unless explicitly excluded. The disclosure contained throughout this specification can be applied, in a meaningful sense, to the same parts with the same reference numerals or the same part names. Furthermore, positional information selected in the specification, such as top, bottom, side, etc., refers to the directly described and displayed graphics and can be meaningfully transferred to the new position when the position changes. Additionally, individual features or combinations of features in the different embodiments shown and described may also represent independent, inventive, or in accordance with this invention.
[0095] Figure 1a and Figure 1b Two states of a known vibration damper unit 110 installed in a vehicle are shown. The vibration damper unit 110 is used to dampen and cushion vehicle impacts and for height adjustment. A longitudinal axis L passes through the vibration damper unit 110, and the damping action occurs in this direction. The vibration damper unit 110 includes a damper 112, such as a hydraulic damper. A stop cap element 114 is fixed to the end face of the damper 112. The stop cap element 114 is fixed to the damper 112, for example, to the damper housing. A damper rod extends from the same end face of the damper housing and connects to a support 118.
[0096] To adjust the vehicle height, the vibration damper unit 110 has a base adjustment device 116. The base adjustment device 116 includes a first wall and a second wall, which are spaced apart from each other along the longitudinal axis L and together with at least one membrane surround a variable volume, particularly a fluid volume. The vibration damper unit 110 also includes a support 118, which is disposed opposite to the base adjustment device 116 along the longitudinal axis L.
[0097] It further comprises a spring 120, here shown as a helical compression spring, which is supported at one end on the base adjustment 116 and at the other end on the support 118. Exerting a force on the base adjustment 116 in the direction of the support 118 or on the support 118 in the direction of the base adjustment 116 leads to a compression of the spring 120. In order to prevent an overloading of the spring 120 and in the most extreme case a complete compression of the spring 120 (the spring 120 is completely compressed and the loops of the spring 120 are in contact with each other), the vibration damper unit 110 has a resilient additional spring 122. The additional spring 122 is arranged between the base adjustment 116 and the support 118. Furthermore, the additional spring 122 is arranged opposite the stop cover element 114 along the longitudinal axis L. Thus, in order to limit the compression stroke, the additional spring 122 can abut against the stop cover element 114.
[0098] Under dynamic load, for example in a driving operation, the vibration damper unit 110 dynamically jumps around the zero point N. The maximum compression stroke X max is limited by the progression of the additional spring 122.
[0099] If the vehicle is loaded in this state ( Figure 1a ), the spring 120 yields to the load-dependent path b. To illustrate, this is shown in Figure 1a . Thus, the additional spring 122 also moves around the path b towards the stop cover element 114. Thus, the vehicle is lowered due to the load-dependent compression of the spring 120. Now, the height adjustment in the form of the base adjustment 116 should compensate for this. In order to achieve the original height before loading of the vehicle, additional fluid is pumped into the volume of the base adjustment 116, thus increasing the volume, so that the wall of the base adjustment 116 and thus the base of the spring 120 are moved; as shown in Figure 1b . The pre-tensioned spring 122 adjusts along the longitudinal axis L and pushes the support 118, thus pushing the vehicle to the original height.
[0100] It can be seen that the base of the spring 120 on the base adjustment side moves in the direction of the support 118, for example precisely back to the path b. However, this also restores the original distance between the additional spring 122 and the stop cover element 114 before loading of the vehicle. This side effect is associated with a serious disadvantage.
[0101] Under the same dynamic load (compare: Figure 1a the vibration damper unit 110 in the original and unloaded state), the vibration damper unit 110 also dynamically jumps around the zero point N in the state shown in Figure 1b . This is also because the spring 120 does not behave progressively. In this state ( Figure 1b ), the maximum compression stroke X maxAlso again limited by the progression of the additional spring 122. However, the spring 120 has been compressed by the load over the pre-tension path s and is pre-tensioned. It is assumed here that s = b. Thus, the spring 120 is subjected to a greater load over the path b and can fail prematurely.
[0102] Figure 2a and Figure 2b Two states of one embodiment of a vibration damper unit 10 installed in a vehicle are shown in longitudinal sectional views. Figure 2a An unloaded state of the vehicle is shown with the base adjustment device 16 retracted. On the other hand, Figure 2b A loaded state of the vehicle is shown with the base adjustment device 16 extended.
[0103] The vibration damper unit 10 serves to dampen and cushion impacts of the vehicle and to adjust the height. A longitudinal axis L runs through the vibration damper unit 10 in a corresponding axial direction A, along which the damping action takes place. The vibration damper unit 10 comprises a damper 12, for example a hydraulic damper, having a damper housing 24 and a damper rod 38. A stop cover element 14 loosely rests against an end face of the damper 12. The damper rod 38 extends from the same end face of the damper housing 24 and is connected with a carrier 18.
[0104] For adjusting the height of the vehicle, the vibration damper unit 10 has a base adjustment device 16. The base adjustment device 16 comprises a first wall element 28 which is supported on a support ring 30 of the damper 12 and is fixedly connected with the damper housing 24. The base adjustment device 16 comprises a second wall element 32 which is axially spaced apart from the first wall element 28. The second wall element 32 is axially movable relative to the first wall element 28 and is guided on the damper housing 24. Between the wall elements 28, 32 there is arranged a chamber 34 which is defined on both sides in the radial direction by elastomer membranes 36. By means of an adjustable gas and / or fluid pressure in the chamber 34, the axial distance between the two wall elements 28, 32 can be adjusted. In the next position of the two wall elements 28, 32 to each other, the base adjustment device 16 has a retracted position, as shown in Figure 2a The first wall element 28 has a stopper 46 in the form of a hollow cylinder which extends in the direction of the longitudinal axis L towards the second wall element 32. The second wall element 32 has a stopper 48 in the form of an annular step. In the shown retracted position, the hollow cylinder and the annular step support each other.
[0105] The vibration damper unit 10 further comprises a carrier 18 which is arranged opposite the base adjustment device 16 along the longitudinal axis L.
[0106] The vibration damper unit 10 further comprises a spring 20, here shown as a helical compression spring, which is supported at one end on the second wall element 32 of the base adjustment device 16 and at the other end on the carrier 18. Exerting a force on the base adjustment device 16 in the direction of the carrier 18 or on the carrier 18 in the direction of the base adjustment device 16 causes the spring 20 to compress. In order to prevent the spring 20 from being overloaded or, in the most extreme case, completely compressed (the spring 20 is completely compressed and the loops of the spring 20 are in contact with one another), the vibration damper unit 10 has a resilient additional spring 22. The additional spring 22 is fixedly connected to the carrier 18, for example by a clamping seat or a form fit. The additional spring 22 is arranged between the base adjustment device 16 and the carrier 18. Furthermore, the additional spring 22 is arranged opposite the stop cover element 14 along the longitudinal axis L. Thus, in order to limit the compression stroke, the additional spring 22 can rest against the stop cover element 14 and be compressed. The stop cover element 14 forms a stop for the additional spring 22. The stop cover element 14 comprises a disc segment 50 and a cylindrical sleeve segment 52.
[0107] The vibration damper unit 10 further comprises a connecting element 26, which is formed as a hollow cylindrical segment of the base adjustment device 16. The connecting element 26 is formed integrally with the second wall element 32 and extends to the stop cover element 14. In the retracted position of the base adjustment device 16, the stop cover element 14 rests loosely against an end face of the connecting element 26. Thus, the connecting element 26 serves to connect or couple the base adjustment device 16 with the stop cover element 14. The connecting element 26 is axially and radially guided by the damper housing 24. The stop cover element 14 is supported in the axial direction A by the connecting element 26 and in the radial direction. To this end, bearing rings or axial ribs 40 are used, which are arranged in the radial space between the stop cover element 14 and the connecting element 26. The axial ribs 40 are formed by the stop cover element 14 and are arranged on its sleeve segment 52.
[0108] Under dynamic load, for example in a driving operation, the vibration damper unit 10 dynamically jumps around the zero point N. The maximum compression stroke X max is limited by the progression of the additional spring 22.
[0109] Adjusting the second wall element 32 by the corresponding pressure change in the chamber 34 along the adjustment path b will adjust the second wall element 32 in the axial direction A towards the additional spring 22, as Figure 2b is shown. At the same time, the connecting element 26 and the stop cover element 14 are also adjusted in the direction of the additional spring 22 by the same path b, the additional spring 22 being compressed. The maximum compression stroke X max is shortened by the path b. Furthermore, this also compresses the spring 22. After loading the vehicle, the original height before loading is restored by adjusting the base, which is compressed by the spring 22, as Figure 2bAs shown. As long as the stop cover element 14 and the connecting element 26 are coupled, the adjustment path of the base adjustment device 16 is the same as the adjustment path of the stop cover element 14. The shortened additional spring stroke takes into account the equally shortened spring stroke.
[0110] Under the same dynamic load (compare: Figure 2a The vibration damper unit 10 is in its original and unloaded state. Figure 2b In the state shown, it dynamically bounces around the zero point N+b of the movement. This is also because spring 20 does not exhibit a gradual behavior. In this state ( Figure 2b Maximum compression stroke X max It is also again limited by the progressive nature of the additional spring 22. Spring 20 is compressed and preloaded due to the load, compressing the preload path s. However, the additional spring travel is also shortened, with the maximum compression travel X... max Path b is shortened. Therefore, at maximum compression, regardless of Figure 2a and Figure 2b Regardless of the base adjustment position shown, the spring 20 will not be subjected to greater load or fail prematurely.
[0111] Figure 3a and Figure 3b Two states of an embodiment of another vibration damper unit 10 installed in a vehicle are shown in a longitudinal sectional view. Figure 3a The image shows the vehicle in its unloaded state with the base adjustment device 16 almost retracted. However, Figure 3b The image shows the vehicle's loading position with the base adjustment device 16 extended. To avoid repetition, only the configuration shown below is described. Figure 2a and Figure 2b The difference is that the rest are similar.
[0112] The end face of connecting element 26 is now slightly shorter, so it no longer reaches stop cover element 14 in the retracted position of base adjusting device 16. A free travel F is formed between the stop cover element 14 and the stop cover element contact surface 42 of the base adjusting device 16. The adjusting path (path b) of the base adjusting device 16 is greater than the adjusting path (path bF) of the stop cover element 14.
[0113] Therefore, the stop cover element 14 is only driven after the connecting element 26 has moved a distance corresponding to the free travel, and adjusts along the path bF in the direction of the additional spring 22. At this time, the contact surface 42 of the stop cover element rests on the stop cover element 14. Therefore, the adjustment paths of the stop cover element 14 and the base adjustment device 16 are different. The shortening of the additional spring travel is less than that without free travel F, resulting in X. max -bF.
[0114] If now the second wall element 32 is detached again from the additional spring 22, the connecting element 26 places the stop cover element 14 on the end face side on the damper housing 24 and restores the free stroke F, wherein the placement or reset of the stop cover element 14 can take place by gravity. The axial ribs 40 are located on the inner circumferential side of the stop cover element 14 as separate components.
[0115] Figure 4 An embodiment of the vibration damper unit 10 mounted in a vehicle is shown in a longitudinal section, wherein the base adjustment device 16 is in the extended position. In order to avoid repetitions, only the differences to the vibration damper unit 10 described so far are described in the following, the rest is similar. Figure 2a and Figure 2b The vibration damper unit 11 mounted in a vehicle is shown in a longitudinal section, wherein the base adjustment device 16 is in the retracted position. In order to avoid repetitions, only the differences to the vibration damper unit 10 described so far are described in the following, the rest is similar.
[0116] The connecting element 26 is now in two parts, wherein one part 26a is formed integrally with the stop cover element 14 and the other part 26b is formed integrally with the base adjustment device 16 or the second wall element 32. Both parts 26a, 26b are hollow cylindrical segments of their respective components. The two parts 26a, 26b extend into each other and lie loosely against each other. The axial ribs 40 are not shown here as an example only.
[0117] Figure 5 An embodiment of the vibration damper unit 10 mounted in a vehicle is shown in a longitudinal section, wherein the base adjustment device 16 is in the extended position. In order to avoid repetitions, only the differences to the vibration damper unit 10 described so far are described in the following, the rest is similar. Figure 4 The vibration damper unit 11 mounted in a vehicle is shown in a longitudinal section, wherein the base adjustment device 16 is in the retracted position. In order to avoid repetitions, only the differences to the vibration damper unit 10 described so far are described in the following, the rest is similar.
[0118] The stop cover element 14, the connecting element 26 and the second wall element 32 are formed integrally. The two limit stops 46, 48 lie against each other, the stop cover element 14 is axially spaced apart from the end face of the damper 12.
[0119] Figure 6 An embodiment of the vibration damper unit 10 mounted in a vehicle is shown in a longitudinal section, wherein the base adjustment device 16 is in the extended position. In order to avoid repetitions, only the differences to the vibration damper unit 10 described so far are described in the following, the rest is similar. Figure 2a and Figure 2b The vibration damper unit 11 mounted in a vehicle is shown in a longitudinal section, wherein the base adjustment device 16 is in the retracted position. In order to avoid repetitions, only the differences to the vibration damper unit 10 described so far are described in the following, the rest is similar.
[0120] The functional principle of the vibration damper unit 11 is the same as that of the vibration damper unit 10 described so far, since the distance between the stop cover element 14 and the additional spring 22 can be adjusted by the base adjustment device 16. However, now the additional spring 22 is connected, connectable, coupled or couplable to the base adjustment device 16 instead of the stop cover element 14.
[0121] The stop cover element 14 is fixedly connected with the damper housing 24. No connecting element 26 is provided, since the base adjustment device 16 is located opposite the end face of the damper housing 24 and the additional spring 22 is directly and fixedly connected with the second wall element 32. The damper housing 24 now supports the bearing 18 via its support ring 30. The base adjustment device 16 is fixed on the fixed structure 44.
[0122] Adjusting the second wall element 32 adjusts the additional spring 22 in the direction of the stop cover element 14, thereby shortening the additional spring travel and the maximum spring travel. At the same time, the spring 20 is compressed.
[0123] The utility model is not limited to one of the above embodiments, but can be modified in various ways. All features and advantages derived from the description and the drawings, including structural details, spatial arrangements and process steps, whether alone or in various combinations, can be essential elements of the utility model.
[0124] The utility model includes all combinations of at least two features disclosed in the description and / or the drawings.
[0125] In order to avoid repetition, features disclosed in relation to the device should also be considered as disclosed in relation to the method and can be claimed. Likewise, features disclosed in relation to the method should also be considered as disclosed in relation to the device and can be claimed.
Claims
1. A vibration damper unit (10) projecting with a longitudinal axis (L) therethrough, comprising a damper (12) having a stop cover element (14) arranged at an end side, a base adjustment device (16), a bearing (18) arranged opposite the base adjustment device (16) along the longitudinal axis (L), a spring (20) supported at one end on the base adjustment device (16) and at the other end on the bearing (18), and an additional spring (22) arranged between the base adjustment device (16) and the bearing (18) and arranged opposite the stop cover element (14) along the longitudinal axis (L), characterized in that The stop cover element (14) is connected, connectable, coupled or couplable with the base adjustment device (16).
2. The vibration damper unit (10) according to claim 1, characterized in that The vibration damper unit (10) comprises a connecting element (26) which connects, connectable, couples or couplable the base adjustment device (16) with the stop cover element (14).
3. The vibration damper unit (10) according to claim 2, characterized in that The connecting element (26) is formed by or fixedly connected with the base adjustment device (16), extends in the direction of the stop cover element (14) and / or is formed by or fixedly connected with the stop cover element (14) and extends from the stop cover element (14) to the base adjustment device.
4. The vibration damper unit (10) according to claim 2 or 3, characterized in that The stop cover element (14) loosely rests on the connecting element (26) and / or the damper (12).
5. The vibration damper unit (10) according to claim 2, characterized in that The stop cover element (14) is supported in axial direction (A) by the connecting element (26) and / or in radial direction by the connecting element (26) and / or in radial direction by the damper (12).
6. The vibration damper unit (10) according to claim 2, characterized in that In the unloaded state of the vibration damper unit (10) and / or in the retracted position of the base adjustment device (16), a free travel (F) is formed between the stop cover element (14) and the base adjustment device (16) or the connecting element (26).
7. A vibration damper unit, a longitudinal axis (L) protruding through the vibration damper unit, comprising a damper (12) having a stop cover element (14) arranged at an end face, a base adjustment device (16), a support (18) arranged opposite the base adjustment device (16) along the longitudinal axis (L), a spring (20) supported at one end on the base adjustment device (16) and at the other end on the support (18), and an additional spring (22) arranged between the base adjustment device (16) and the support (18) and arranged opposite the stop cover element (14) along the longitudinal axis (L), characterized in that the additional spring (22) is connected, connectable, coupled or couplable with the base adjustment device (16).