Foot point adjustment device with actuators, spring strut and arrangement

Abstract

We propose a foot point adjustment device (2) that can be implemented from a damper longitudinal axis (Z2), comprising a first actuator (10) with a first actuator longitudinal axis (Z10) and a second actuator (20) with a second actuator longitudinal axis (Z20).

Description

The invention relates to a foot point adjustment device with several actuators according to claim 1 and a spring strut as well as an arrangement. Adjustable spring perch mechanisms for shock absorbers are well-known in practice. These mechanisms serve to adjust the height of a spring plate against which a shock absorber spring rests. The height adjustment is achieved by means of a single actuator, which is positioned circumferentially or laterally in relation to a shock absorber installed in the shock absorber. If no shock absorber is present, the single actuator is typically positioned relative to the spring such that the spring and actuator share approximately the same central longitudinal axis. MacPherson struts are also well-known. They typically consist of a damper fixed to a wheel carrier, which is positioned close to the tire and its rim. The spring plate is fixed to the damper tube. The spring rests between the spring plate and a strut tower on the vehicle body, with one degree of rotational freedom provided at the spring tower, for example, by means of a thrust bearing. Existing adjustable suspension footrests are unsuitable for use in the confined spaces of MacPherson struts due to their bulky design. Furthermore, the single actuator can create adverse tilting moments if it is positioned to the side of the shock absorber. Additionally, existing adjustable suspension footrests offer room for improvement regarding load distribution. The object of the invention is therefore to improve the prior art accordingly. Features according to the invention are specified in claims 1 and 12. Embodiments are the subject of the disclosure, in particular claims 2 to 11. According to the invention, a foot point adjustment device is proposed which can be passed through a damper longitudinal axis, comprising a first actuator with a first actuator longitudinal axis and a second actuator with a second actuator longitudinal axis. The invention can also be interpreted as comprising the disclosed foot-adjustment device and the damper(s). Thus, a foot-adjustment device is created that provides two actuators instead of a single, bulky actuator that circumferentially surrounds a damper. The two actuators can be arranged or arranged next to a damper instead of circumferentially surrounding it. The damper can be located outside the actuators. The arrangement of two actuators not only enables a compact overall design, but the proposed foot-adjustment device can also be implemented without significantly increasing costs compared to a single, larger, and more complex actuator. The foot point is a common foot point for both actuators. The foot point adjustment device can be used for a shock absorber. This device allows adjustment of the foot point without the risk of a collision with a tire and / or rim. The foot point adjustment can be rigidly connected to the shock absorber. The shock absorber can be rigidly connected to a wheel carrier. Thus, the foot point adjustment device can be fixed to the wheel carrier, allowing both to move together during steering or similar rotational movements. This reliably prevents a collision between the foot point adjustment device and the tire and / or rim. By using two actuators that can be positioned next to a damper, the tilting moments acting on each individual actuator are reduced compared to a single actuator. This allows both actuators to be made smaller. Furthermore, the required actuation pressure can be reduced with two actuators, since, for a given vehicle load, the necessary pressure increases with decreasing projection area. Lower pressure, in turn, leads to a more robust system or more cost-effectively manufactured bellows with a lower burst pressure compared to a system using a single actuator instead of two of the same size. Alternatively, at the same applied pressure, the two actuators each only need half the projection area of ​​a single actuator, resulting in a significantly slimmer design. It is precisely this slim design of the two actuators that makes it possible to meet the challenging installation space requirements of the MacPherson strut. It is therefore conceivable that each of the two actuators is arranged radially adjacent to the damper (i.e., not penetrated by the damper / not circumferentially around the damper). This results in a slim design for the actuators, as the actuator does not need to reserve any internal space for the damper. The outer diameter of at least one actuator, preferably of both actuators, is at most three times the outer diameter of the damper at the level of the actuators, preferably at most twice the outer diameter, and more preferably at most one and a half times the outer diameter. The first and second actuators are separate. The damper's longitudinal axis can extend parallel to the adjustment direction of the foot adjustment device. This reduces the overall installation space required. The two actuators can be hydraulic actuators. Each actuator can have a variable-volume fluid chamber created by means of a bellows, enabling control of a defined target height. Each actuator can include a housing and / or a support tube. Each actuator can include a mounting plate, which can be connected to each other via an adjustment plate. The adjustment plate can be adjustable along the damper's longitudinal axis. Each actuator can be attached to a fixing plate. The fixing plate can be fixed to the damper or fixed relative to the damper. This prevents unwanted rotation around the damper's longitudinal axis. Each actuator can include a bellows, preferably a rolling bellows. Each bellows can define a fluid chamber.Each fluid chamber can be limited exclusively by the mounting plate and / or adjustment plate, the fixing plate and / or the rolling piston, and the bellows. Each bellows can be attached at one end to the mounting plate and / or the adjustment plate and / or the support tube by means of a first bellows attachment. Each bellows can be attached at the other end to the fixing plate and / or the rolling piston and / or the support tube by means of a second bellows attachment. Each bellows can form a rolling fold and / or a stationary fold. Each of the two actuators can include a rolling piston on which the respective bellows rolls. The rolling piston can be attached to the fixing plate. Each of the two actuators can include a valve for filling and emptying the fluid chamber. The bellows attachments can include a clamping ring that secures the bellows. The strut can be a MacPherson strut. The strut can include a damper, a spring, and a spring plate. The damper can be connected to or connectable to a wheel carrier. A wheel carrier can be attached to or attachable to the damper. The spring plate can be located on the damper. The spring can be supported between the spring plate and a strut tower on the vehicle body. If the disclosure refers to "damper," this could mean the damper of the strut. The spring can be a coil spring. The strut can guide the wheel (tire and rim) – in contrast to so-called "spring-damper units," which are sometimes referred to as "struts" but, unlike struts, especially MacPherson struts, do not guide the wheel. In a further development, the two actuator longitudinal axes can be arranged parallel to each other. This allows both actuators to jointly define an adjustment direction for the foot point adjustment device. The two actuator longitudinal axes can also both be arranged radially offset with respect to the damper longitudinal axis. Preferably, both actuator longitudinal axes and the damper longitudinal axis run parallel to each other. Depending on the design, the two actuator longitudinal axes can be arranged diametrically opposite to the damper longitudinal axis. This allows for a uniform foot point adjustment mechanism. Depending on the design, the two actuator longitudinal axes and the damper longitudinal axis can form a triangle in cross-section. The two sides of the triangle, each between one of the damper longitudinal axes and the actuator longitudinal axis, can form an angle between 160° and 179°. This allows the two actuators to be spaced further apart from a tire and / or rim, creating greater radial clearance. The tire and / or rim can be positioned diametrically opposite the triangle with respect to the damper longitudinal axis. In this further development, the two actuators can have a radial distance from each other. The two actuators can form a gap between them. A damper can be arranged in this gap. Compared to the prior art, the actuators are simpler to construct because the damper can be routed alongside the actuators. This eliminates the previously required complex sealing of the actuator's fluid chamber against the damper, which protrudes through the actuator. Each actuator can have a separate housing. The radial distance can be the smallest possible distance between the actuators or housings. Depending on the design, the two actuators can be connected in parallel. This allows them to operate together. The parallel connection can be achieved structurally using a fixing plate and an adjustment plate. The actuators can be positioned between the plates and thus be positively coupled. In a further development, the two actuators can be connected to a fixing plate, preferably the fixing plate being attached to or capable of being attached to a damper. The base adjustment device includes the fixing plate. The two actuators are supported against the fixing plate. The fixing plate can be a single, shared fixing plate for both actuators. This reduces the number of components and tilting moments. In a further development, the two actuators can be connected to an adjustment plate. Preferably, the adjustment plate is adjustable along the damper's longitudinal axis or can be adjusted accordingly. The adjustment mechanism includes the adjustment plate. The two actuators are supported against the adjustment plate. The adjustment plate can be a single, shared plate for both actuators. This reduces the number of components and tilting moments. A further advantage is that the adjustment plate provides radial guidance for the actuators by bearing radially against the damper. Depending on the design, the adjustment plate can be rigidly connected to a spring plate. Adjustment of the plate by the actuators then directly leads to adjustment of the spring plate. Alternatively, the adjustment plate and the spring plate can be attached to an adjustment sleeve for simultaneous adjustment. The damper may extend through the adjustment sleeve. Depending on the design, the adjustment plate can include a lubricant. The lubricant can be a bearing. The lubricant can slidably mount the adjustment plate on the damper or on a central guide element surrounding the damper along the damper's longitudinal axis. The lubricant can be arranged in a cylindrical section of the adjustment plate. The cylindrical section prevents the adjustment plate from tilting or jamming. As a further development, a connection plate can be attached to the adjustment plate for each of the two actuators. The base adjustment device includes the connection plates. The connection plates are attached to the adjustment plate and are therefore adjustable. This allows for a functional separation in a modular sense. While the adjustment plate primarily serves to guide the actuator during adjustment and to transmit the adjustment movement to the spring plate, the connection plates can serve to connect it to the bellows. The adjustment plate can thus be a single component that can be used for differently designed bellows and connection plates, while differently designed bellows can each be assigned to a specific connection plate. These connection plates can differ depending on the bellows. Furthermore, the actuators can be manufactured separately and then assembled into the base adjustment device.Modular manufacturing allows the use of simple and cost-effective tools. According to further training, the two actuators can be structurally identical. Identical actuators ensure consistent adjustment. Furthermore, the identical design increases the number of common parts, resulting in a more cost-effective assembly overall. In a further development, each of the two actuators can include a bellows, preferably a single bellows. Because the fluid chamber does not need to be sealed radially (relative to the respective actuator's longitudinal axis) against the damper, a single bellows per actuator is sufficient. The bellows can delimit the fluid chamber on both the inner and outer circumferences. The bellows can completely delimit the fluid chamber on the outer circumference. The bellows can also partially delimit the fluid chamber on the inner circumference, for example, where it abuts the rolling piston. Depending on the design, the stationary fold of the bellows can be arranged around the outer circumference of the first bellows attachment. The fluid chamber can be located on the outer circumference of the first attachment, so that the internal pressure of the fluid chamber presses against the first attachment. This results in a particularly secure clamping action, making the seal exceptionally robust. Depending on the design, a pleated seat can be provided for each actuator, against which the stationary pleat rests. The pleated seats can be formed by the respective mounting plate or by the adjustment plate. Because the stationary pleat rests against the pleated seat, the supporting force of the base adjustment mechanism is also transferred to the pleated seat. The pleated seat can comprise an annular surface. This annular surface can be bounded (relative to the respective actuator's longitudinal axis) radially on the inside by the first bellows attachment and radially on the outside by the contact end between the stationary pleat and the adjustment plate or mounting plate. The annular surface can be curved. This creates a large area for force transmission, resulting in an advantageous pressure distribution within the components and thus a robust design. In a further development, each of the two actuators can include a support tube; preferably, the respective bellows is supported on its outer circumference by the respective support tube. This prevents the bellows from expanding in diameter. The support tube can be the actuator housing. Depending on the design, the support tube can be attached to the adjustment plate and / or the bellows and / or the connection plate. The support tube can be adjustable relative to the fixing plate and / or the rolling piston. This ensures that the outer circumferential protection of the bellows is independent of the set height of the foot adjustment device. In this configuration, each of the bellows can at least partially, and preferably completely, enclose a space that is / can be filled with an incompressible liquid, preferably in a liquid state ranging from -30 °C to +90 °C. The wide temperature range of the liquid state results in a correspondingly wide operating temperature range, which allows its use in most motor vehicles. In a further development, each of the two actuators can comprise a rolling piston, preferably forming a sliding bearing with the corresponding support tube. The support tube can be slidingly mounted on the rolling piston. This allows each actuator to be guided radially. The support tube can have a free end into which the rolling piston extends, with the support tube and rolling piston being slidingly mounted relative to each other. This ensures secure positioning of the support tube. In this embodiment, the rolling piston can have a belly section whose outer diameter, in a region located along the respective actuator's longitudinal axis adjacent to the rolling fold of the corresponding bellows, is larger than the zenith of the rolling fold. The diameter of the belly section can be such that the support tube forms a clearance fit with the belly section. Since the support tube can be designed particularly cost-effectively if its free end and the section supporting the bellows have the same diameter, it is advantageous if the belly section has approximately the same inner diameter as the support tube to form the sliding bearing. Depending on the design, at least one end stop can be provided for the actuators. Each actuator can include an end stop. In the actuator's end stop position, the distance between the support tube and the fixing plate can be no more than 10 mm. This defines a minimum position for the base adjustment mechanism, ensuring that the support tube is not subjected to significant axial forces. This allows the support tubes to be made thin-walled, and therefore lightweight and cost-effective. The base adjustment mechanism cannot achieve a lower position. The end stop can be formed by stop surfaces of the rolling piston and the connecting plate. In the actuator's end stop position, the rolling piston and the connecting plate can be in contact with each other. In further development, the fixing plate can be rigidly connected to the damper. The damper, in turn, can be rigidly connected to the wheel carrier. This prevents unwanted rotation of the two actuators around the damper's longitudinal axis and a collision with the tire / rim. The rigid connection can be direct or indirect. Depending on the design, the foot-adjustment device can include a valve and / or a hose connection for each actuator. The valve and / or hose connection can be permanently attached to the mounting plate. This prevents the supply line from being subjected to any movement caused by adjusting the foot-adjustment device. This protects the material. Furthermore, a shock absorber with a base adjustment device according to the disclosure is disclosed, wherein the actuators are arranged radially adjacent to the damper. The shock absorber can be a MacPherson strut. The advantages already described above with regard to the base adjustment device also apply analogously to the shock absorber, to which reference is hereby made. Depending on the design, the foot adjustment device can be arranged on one side of a spring plate and a spring on the other side of the spring plate. The foot adjustment device can be positioned below the spring plate and horizontally next to the tire / rim (in each case, relative to an installation position in the vehicle) to save installation space. According to the invention, an arrangement is further proposed comprising a foot adjustment device as disclosed and a tire with a sidewall and a rim, wherein the two actuators and the damper are arranged radially adjacent to the sidewall and / or rim, and each has a radial clearance to the sidewall and / or rim of at least 10 mm, preferably at least 15 mm. This allows the foot adjustment device to be positioned very close to the wheel, thus utilizing installation space. The radial clearances can be different or identical. The advantages already described above regarding the adjustable foot position and the shock absorber also apply analogously to the arrangement described here. The two individual actuators can be relatively simple and positioned next to the damper in such a way that the installation space towards the wheel carrier and / or towards the tire / rim is not significantly restricted. The positioning can be such that a minimum clearance of 10 mm between the actuators and the tire / rim is maintained. Alternatively, instead of the adjustable foot position, the arrangement can include a shock absorber with an adjustable foot position as disclosed. The radial clearance can be the minimum distance between, on the one hand, the sidewall and / or rim and, on the other hand, the corresponding actuator and / or damper. The tire is mounted on a rim. The tire and the rim define a wheel. The wheel has an axis of rotation around which it rotates when rolling.The wheel has a steering axis around which it rotates when the wheel is steered. The radial clearance / minimum distance can be parallel to the tire's axis of rotation. It is conceivable that the radial clearance between the sidewall and / or rim on one side and the corresponding actuator on the other is greater than the radial clearance between the sidewall and / or rim on the one hand and the damper on the other. This allows the two actuators to be spaced further apart relative to the tire and / or rim. A larger radial clearance can be created. The tire's axis of rotation and the damper's longitudinal axis can intersect. This ensures a centered arrangement. The actuator's longitudinal axes can be opposite each other with respect to the tire's axis of rotation. The sidewall faces the foot adjustment mechanism. A foot point adjustment device for a (single) shock absorber is disclosed. An arrangement comprising a (single) foot point adjustment device as disclosed is disclosed. The terms "radially adjacent," "next to," and "next door" can be used synonymously. The terms "radial" and "radial direction" refer to one or more disclosed axes. If components are disclosed multiple times, embodiments and advantages described for only one of the components shall also be deemed to be optionally disclosed for the other corresponding components. Axial and axial direction run parallel to the longitudinal axis. Radial and radial direction run perpendicular to the longitudinal axis. Circumference and circumferential direction run around the longitudinal axis. The described advantages arise particularly within the specified area limits; however, the advantages may also exist beyond one or both of these specific area limits, albeit in a lesser form. Further features, details and advantages of the invention will become apparent from the wording of the claims and from the following description of exemplary embodiments with reference to the drawings. The drawings show: Fig. 1 a perspective view of a shock absorber, Fig. 2 a longitudinal section through the shock absorber of Fig. 1, Fig. 3 a mounting position of the shock absorber of Fig. 1 and Fig. 4 a cross-section through the installed position of the shock absorber of Fig. 3. In the figures, identical or corresponding elements are designated with the same reference numerals and are therefore not described again unless expedient. Features already described are not described again to avoid repetition and are applicable to all elements with the same or corresponding reference numerals, unless explicitly excluded. The disclosures contained in the entire description are transferable analogously to identical parts with the same reference numerals or component designations. Furthermore, the positional designations chosen in the description, such as top, bottom, side, etc., refer to the directly described and illustrated figure and must be applied analogously to any new position.Furthermore, individual features or combinations of features from the different exemplary embodiments shown and described can also represent independent, inventive or inventive solutions. Figures 1, 2, 3 to 4 show an identical strut 100. The strut 100 is a MacPherson strut. The strut 100 comprises a damper 102, a spring plate 104, and a coil spring 106. Fig. 1 also shows a strut tower 108 of a car body. Fig. 3 shows a wheel carrier 110. The damper 102 is rigidly connected to the wheel carrier 110 in a MacPherson strut configuration. The damper 102 is penetrated along its longitudinal direction by a damper longitudinal axis Z2. The spring plate 104 is slidably mounted on the damper 102. The spring 106 is supported between the spring plate 104 and the strut tower 108. Fig. 3 also shows a tire 300 with a sidewall 302. The tire 300 is mounted on a rim 304 and is steerable about a steering axis A and rotatable about a pivot axis B. The tire 300 and rim 304 define a wheel. The shock absorber 100 guides the wheel. The shock absorber 100 also includes a single base adjustment device 2. The base adjustment device 2 is intersected by the damper longitudinal axis Z2. It comprises a first actuator 10 with a first actuator longitudinal axis Z10 and a second actuator 20 with a second actuator longitudinal axis Z20. The first actuator 10 and the second actuator 20 are separate actuators. The damper longitudinal axis Z2 extends parallel to the adjustment direction of the base adjustment device 2. The two actuator longitudinal axes Z10, Z20 extend parallel to each other and also parallel to the damper longitudinal axis Z2. The two actuator longitudinal axes Z10, Z20 are also both radially offset with respect to the damper longitudinal axis Z2. The actuators 10, 20 are positioned radially adjacent to the damper 102. The two actuator longitudinal axes Z10 and Z20 and the damper longitudinal axis Z2 form a triangle D in cross-section. The two sides of the triangle, each between a damper longitudinal axis Z10 or Z20 and the actuator longitudinal axis Z2, form an angle W between 160° and 179°. The tire 300 and the rim 304 are diametrically opposite triangle D with respect to the damper longitudinal axis Z2. The two actuators 10, 20 are hydraulic actuators and structurally identical. In each actuator 10, 20, a variable-volume fluid chamber 19, 29 is created by means of a bellows 13, 23, which enables the control of a defined target height H. Each of the two actuators 10, 20 has a separate housing 11, 21, which is largely formed by the support tube 16, 26, with the housings 11, 21 having a radial distance R between them. The two housings 11, 21 form a space between them. The damper 102 is arranged in this space. The damper 102 is therefore routed alongside the actuators 10, 20, instead of being guided through a single actuator that would then circumferentially surround the damper. The two actuators 10, 20 are connected in parallel, which in the illustrated embodiment is achieved structurally by means of a fixing plate 4 and an adjusting plate 6. The actuators 10, 20 are arranged between the plates 4, 6 and are thus positively coupled. The two actuators 10 and 20 are connected at one end to the common fixing plate 4 of the foot adjustment device 2. The two actuators 10 and 20 are supported against the fixing plate 4. The fixing plate 4 is fixed to the damper 102 and also secured against rotation. The two actuators 10 and 20 are connected at their other ends to the common adjustment plate 6 of the foot adjustment device 2. The two actuators 10 and 20 are supported against the adjustment plate 6. The adjustment plate 6 is adjustable along the damper 102 along the damper's longitudinal axis Z2. The adjusting plate 6 is rigidly connected to the spring plate 104 via an adjusting sleeve 9. Adjusting the adjusting plate 6 to the target height Z by the actuators 10, 20 directly adjusts the spring plate 104 accordingly. The adjusting plate 6 includes a lubricant 7, which allows the adjusting plate 6 to slide along the damper 102's longitudinal axis Z2. The lubricant 7 is located in a cylindrical section of the adjusting plate 6. Each of the two actuators 10, 20 has a connection plate 12, 22. The connection plates 12, 22 are attached to the adjustment plate 6 and are therefore adjustable. Each actuator 10, 20 comprises a single bellows 13, 23, which is designed as a rolling bellows. Each bellows 13, 23 defines a fluid chamber 19, 29 on its inner and outer circumference. The fluid chamber 19, 29 is defined exclusively by the connecting plate 12, 22, a rolling piston 17, 27, and the bellows 13, 23. Each bellows 13, 23 is attached at one end to the connecting plate 12, 22 by means of a first bellows attachment 133, 233 and at the other end to the rolling piston 17, 27 by means of a second bellows attachment 134, 234. Each bellows 13, 23 forms a rolling fold 131, 231 and a stationary fold 132, 232. The stationary fold 132, 232 of the bellows 13, 23 is arranged circumferentially around the first bellows attachment 133, 233. The fluid chamber 19, 29 is therefore located circumferentially around the first attachment 133, 233, so that the internal pressure of the fluid chamber 19, 29 exerts pressure on the first attachment 133, 233. Each bellows 13, 23 is supported circumferentially by the respective support tube 16, 26. The support tube 16, 26 is attached to the corresponding connecting plate 12, 22 and is thus adjustable. A folding seat 121, 221 for each actuator 10, 20 is formed by the respective connecting plate 12, 22. The stationary fold 132, 232 rests against the folding seat 121, 221. The folding seat 121, 221 comprises a convex annular surface which, with respect to the respective actuator longitudinal axis Z10, Z20, is bounded internally radially by the first bellows attachment 133, 233 and externally radially by the contact end between the stationary fold 132, 232 and the connecting plate 12, 22. Each of the two actuators 10, 20 comprises the respective rolling piston 17, 27, on which the respective bellows 12, 23 rolls via its rolling fold 131, 231. Each rolling piston 17, 27 has a belly section 171, 271, the outer diameter of which is larger than the zenith of the rolling fold 131, 231 in a region located along the respective actuator longitudinal axis Z10, Z20 adjacent to the rolling fold 131, 231 of the corresponding bellows 12, 23 in a region located along the respective actuator longitudinal axis Z10, Z20. The respective rolling piston 17, 27 forms a sliding bearing with the corresponding support tube 16, 26, whereby a clearance fit is present. The support tube 16, 26 has a free end 161, 162, which is slidingly supported on the belly section 171, 271. Each rolling piston 17, 27 forms an end stop 8, each comprising stop surfaces 122, 172, 222, 272 of rolling piston 17, 27 and connecting plate 12, 22. When the stop surfaces 122, 222, 172, 272 are in contact, the rolling pistons 17, 27 can at least partially protrude into the support tubes 16, 26, resulting in a distance of at most 10 mm. Each of the two actuators 10, 20 can include a valve or a hose connection 18, 28 for filling and emptying the respective fluid chamber 19, 29. The valve or hose connection 18, 28 is fixedly attached to the fixing plate 4, which in turn is fixedly attached to the damper and in relative stillness with respect to the wheel carrier. An arrangement 200 comprises the foot adjustment device 2, the tire 300 with its sidewall 302 facing the foot adjustment device 2, and the rim 304. The two actuators 10, 20 are arranged radially adjacent to the sidewall 302 and / or the rim 304. The two actuators 10, 20 each have a radial clearance F to the sidewall 302 and / or rim 304 of at least 10 mm. The damper 100 also has a radial clearance F to the sidewall 302 and / or rim 304 of at least 10 mm. In this case, the radial clearances F are identical. The wheel has a steering axis A about which it is steered, and a rotation axis B about which it rolls. The foot adjustment device 2 is arranged on one side of a spring plate 104, and the spring 106 is arranged on the other side of the spring plate 104. The foot adjustment device 2 is arranged below the spring plate 104 and horizontally next to the tire 300 and / or the rim 304 (each with reference to an installation position in the motor vehicle) in a space-saving manner. The invention is not limited to one of the embodiments described above, but can be modified in a variety of ways. All features and advantages arising from the claims, the description, and the drawings, including design details, spatial arrangements, and process steps, can be essential to the invention both individually and in various combinations. The invention encompasses all combinations of at least two of the features disclosed in the description, the claims and / or the figures. To avoid repetition, features disclosed by the device itself shall also be deemed disclosed by the process and be claimable. Likewise, features disclosed by the process shall be deemed disclosed by the device itself and be claimable. Reference symbol list 2 Foot point adjustment device 4 Fixing plate 6 Adjustment plate 7 Lubricant 8 End stop 9 Adjustment sleeve 10 Actuator 11 Housing 12 Mounting plate 121 Folded seat 122 Stop surface 13 Bellows 131 Rolled fold 132 Stationary fold 133 (First) mounting 134 (Second) mounting 16 Support tube 161 Free end 17 Rolling piston 171 Belly section 172 Stop surface 18 Valve 19 Fluid chamber 20 Actuator 21 Housing 22 Mounting plate 221 Folded seat 222 Stop surface 23 Bellows 231 Rolled fold 232 Stationary fold 233 (First) mounting 234 (Second) mounting 26 Support tube 261 Free end 27 Rolling piston 271 Belly section 272 Stop surface 28 Valve 29 Fluid chamber 100 Strut 102 Damper 104 Spring plate 106 Spring 108 Strut tower 110 Wheel carrier 200 Arrangement 300 Tire 302 Sidewall 304 Rim 306 Tread A Steering axis B Axis of rotation D Triangle F Radial clearance H Target height R Radial distance W Angle Z2 Damper longitudinal axis Z10 Actuator longitudinal axis Z20 Actuator longitudinal axis

Claims

Foot point adjustment device (2) which can be passed by a damper longitudinal axis (Z2) comprising a first actuator (10) with a first actuator longitudinal axis (Z10) and a second actuator (20) with a second actuator longitudinal axis (Z20). Foot point adjustment device (2) according to claim 1, characterized in that the two actuator longitudinal axes (Z10, Z20) are arranged parallel to each other. Foot point adjustment device (2) according to one of the preceding claims, characterized in that the two actuators (10, 20) have a radial distance (R) from each other. Foot point adjustment device (2) according to one of the preceding claims, characterized in that the two actuators (10, 20) are connected to a fixing plate (4), preferably the fixing plate (4) is attached to a damper (102). Foot point adjustment device (2) according to one of the preceding claims, characterized in that the two actuators (10, 20) are connected to an adjustment plate (6), preferably the adjustment plate (6) is adjustable on a damper (102) along the damper longitudinal axis (Z2). Foot point adjustment device (2) according to claim 5, characterized in that a connecting plate (12, 22) is attached to the adjustment plate (6) for each of the two actuators (10, 20). Foot point adjustment device (2) according to one of the preceding claims, characterized in that the two actuators (10, 20) are structurally identical. Foot point adjustment device (2) according to one of the preceding claims, characterized in that each of the two actuators (10, 20) comprises a bellows (13, 23). Foot point adjustment device (2) according to one of the preceding claims, characterized in that each of the two actuators (10, 20) comprises a support tube (16, 26), preferably the respective bellows (13, 23) is supported on its outer circumference by the respective support tube (16, 26). Foot point adjustment device (2) according to claim 8 or 9, characterized in that each of the two actuators (10, 20) comprises a rolling piston (17, 27), preferably the respective rolling piston (17, 27) forms a sliding bearing with the corresponding support tube (16, 26). Foot point adjustment device (2) according to one of the preceding claims, characterized in that the fixing plate (4) is firmly connected to the damper (102). Arrangement (200) comprising a foot point adjustment device (2) according to one of the preceding claims and a tire (300) with a side wall (302) and a rim (304), wherein the two actuators (10, 20) and the damper (100) are arranged radially adjacent to the side wall (302) and / or rim (304), and each has a radial clearance (F) to the side wall (302) and / or rim (304) of at least 10 mm, preferably of at least 15 mm.

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