Height adjustment system for chassis of motor vehicle

Abstract

The invention relates to a height adjustment system (10) for a chassis of a motor vehicle, comprising: a spring (12); one end of the spring seat (14) abuts against the spring (12); the spring seat (14) comprises a threaded sleeve (20) coaxially attached to the spring (12) and having an external thread, and a threaded ring (22) attached to the threaded sleeve (20) and having an internal thread interacting with the external thread of the threaded sleeve (20); the spring seat (14) has a connecting element (24) which is attached to the threaded sleeve (20) for connecting the spring seat (14) to the motor vehicle body.

Description

Technical Field

[0001] The invention relates to a height adjustment system for a motor vehicle chassis. Background Art

[0002] In order to adjust the height of the chassis of a motor vehicle, the distance between the vehicle body and the wheel suspension is usually adjusted. A supporting spring is usually arranged between these components, for example in conjunction with a shock absorber. In order to adjust the height of the chassis, a spring seat is usually designed to be adjustable relative to the chassis. The spring seat is attached, for example, to the wheel suspension or the vehicle body and is designed according to the installation location or the type of motor vehicle so that it can be fixed. The adaptation of the spring seat to the installation location or the type of motor vehicle requires a very complex production process. Such a spring seat is described, for example, in EP 3 959 088 B1. Summary of the invention

[0003] Based on this, the object of the present invention is to provide a height adjustment system for a motor vehicle chassis which can be produced simply and economically and can be attached to different types of vehicles and installation locations.

[0004] According to the invention, this object is achieved by a device having the features of independent device claim 1. Additional developments are set forth in the dependent claims.

[0005] According to a first aspect, a device for achieving this object comprises a height adjustment system for a chassis of a motor vehicle, the system having a spring, a spring seat, one end of which rests against the spring, the spring seat comprising: a threaded sleeve coaxially attached to the spring and having an external thread, and a threaded ring attached to the threaded sleeve, the threaded ring having an internal thread interacting with the external thread of the threaded sleeve. The spring seat has a connecting element, which is attached to the threaded sleeve and is used to connect the spring seat to the body of the motor vehicle.

[0006] For example, the height adjustment system has one or two spring seats, each of which is connected to a respective end of a spring. In particular, at least one spring seat is connected to the vehicle body or a wheel suspension element. For example, one end of the spring is connected to a spring seat, which is connected to a structural element of the wheel suspension, such as a transverse link or a wheel carrier. Preferably, the spring is designed as a helical spring, in particular with a plurality of coils. In particular, the spring has a constant inner diameter and / or outer diameter. For example, the spring ends have the same inner diameter and the spring in the middle region has a larger inner diameter. For example, the height adjustment system comprises a shock absorber, which is preferably connected mechanically in parallel with the spring. The shock absorber is preferably connected to the vehicle body and / or the wheel suspension element. Preferably, only the connecting element is connected to the vehicle body via the spring seat. In particular, the threaded sleeve cannot or is not directly connected to the vehicle body.

[0007] The spring seat comprises in particular a threaded sleeve, which preferably extends coaxially with the spring. The inner diameter of the spring is preferably greater than or equal to the outer diameter of the threaded sleeve, so that the spring is attached circumferentially around the threaded sleeve. The threaded sleeve preferably extends from one end of the spring along the central center axis into the spring, preferably in the range of about 25%-50%, in particular 30% to 40% of the axial length of the spring, preferably in the non-operating position. The threaded sleeve has, for example, an external thread, which is preferably formed on the outer circumferential surface of at least part or the entire threaded sleeve.

[0008] The spring seat further comprises a threaded ring, against which preferably one end of the spring rests. The threaded ring preferably has a surface extending radially in the direction of the spring and against which the spring rests so that the threaded ring forms an axial stop for the spring. The threaded ring preferably has an internal thread, which is formed on at least part of or the entire inner surface of the threaded ring. The threaded ring preferably forms a circular ring, whose internal thread interacts in particular with the external thread of the threaded sleeve to form a threaded connection. Preferably, the threaded sleeve is connected in a fixed manner and the threaded ring is axially movably connected relative to the threaded sleeve, so that the axial position of the threaded ring on the threaded sleeve is adjustable, in particular manually or automatically adjustable. A change in the position of the threaded ring on the threaded sleeve preferably results in a change in the preload of the spring and / or a change in the distance of the wheel suspension from the vehicle body.

[0009] The spring seat also preferably comprises a connecting element for connecting the threaded sleeve to the vehicle body. The connecting element, the threaded sleeve and the threaded ring are preferably designed as separate components. Preferably, only the connecting element is formed for connecting the spring seat to the vehicle body. This has the advantage that the connecting element can be easily and economically adapted to the geometry of the respective vehicle body without having to design a different spring seat for each vehicle model.

[0010] According to a first embodiment, the connecting element is made of plastic. For example, the plastic can be PA6 GF50 or PA6.6GF50, preferably a glass-fiber-reinforced or carbon-fiber-reinforced plastic. Preferably, the connecting element is made completely of plastic. For example, the connecting element is made of a composite material consisting of plastic and glass fibers. In particular, the connecting element is made of a material that contains carbon fibers and / or glass fibers in a proportion of 15% to 70%, in particular 30% to 60%, preferably the remaining material partially or completely consisting of plastic. The connecting element is preferably produced by an injection molding process. The configuration of the connecting element made of plastic provides an economical production method, in which only the connecting element, but not the entire spring seat, is made of plastic.

[0011] According to another embodiment, the threaded sleeve and / or the threaded ring are made of metal. For example, the threaded sleeve and / or the threaded ring are made of steel or aluminum. Alternatively, the threaded sleeve and / or the threaded ring can also be made of plastic.

[0012] According to a further embodiment, the connecting element is connected to the threaded sleeve in a fixed position, in particular by a crimping connection. Preferably, the connecting element is fixedly connected to the threaded sleeve by a form fit, a force fit and / or a substance-to-substance bond. For example, the connecting element is connected to the threaded sleeve by a crimping connection. Preferably, the connection between the threaded sleeve and the connecting element cannot be released non-destructively.

[0013] According to another embodiment, the connecting element has a first region, which is arranged completely or partially in the threaded sleeve. Preferably, the first region forms a crimping connection together with the threaded sleeve. In particular, the connecting element is fixed to the threaded sleeve only via the first region. The connecting element is preferably substantially sleeve-shaped, in particular in the form of a hollow cylinder. The first region of the connecting element is in particular hollow cylindrical and is arranged completely or partially in the threaded sleeve. The outer diameter of the first region is preferably slightly larger than the inner diameter of the threaded sleeve, so that a crimping connection is formed between the threaded sleeve and the connecting element, in particular between the first region of the connecting element. The first region of the connecting element preferably has an inner diameter and / or an outer diameter that is constant over the axial length.

[0014] According to another embodiment, the connecting element has a flange area, which forms the contact surface of the threaded ring. The flange area is preferably fixedly connected to the first area of ​​the connecting element, the flange area is in particular integrally formed or formed as a whole. The flange area preferably has a larger outer diameter than the first area of ​​the connecting element. The flange area preferably adjoins the end side of the first area of ​​the connecting element close to the vehicle body and preferably extends beyond the threaded sleeve in the axial and radial direction. The flange area preferably has an axial surface facing the direction of the spring, which extends radially beyond the threaded sleeve and in particular forms the contact surface of the threaded ring. The flange area preferably forms an axial stop for the threaded ring.

[0015] According to another embodiment, the connecting element has a second region, whose inner diameter is smaller than the inner diameter of the first region of the connecting element. The second region is preferably sleeve-shaped, in particular hollow cylindrical, preferably extending coaxially with the first region and the flange region. The second region preferably extends out of the threaded sleeve at least partially or completely in the axial direction. Preferably, the second region directly adjoins the flange region in the axial direction. In particular, the inner diameter of the second region is smaller than the inner diameter of the first region, the flange region and the threaded sleeve. The outer diameter of the second region is optionally smaller than the outer diameter of the first region, the flange region and the threaded sleeve. The second region is preferably directly adjacent to the end region of the first region away from the spring, for example, at least partially extending in the threaded sleeve. Preferably, the second region has a constant inner diameter and / or outer diameter in the axial range.

[0016] The second region is preferably designed for connecting the spring plate, in particular the connecting element, to the vehicle body, so that the vehicle body is preferably directly connected only to the second region of the connecting element.

[0017] According to another embodiment, the connecting element is preferably integrally formed or monolithically formed.

[0018] According to another embodiment, the connecting element consists of multiple parts. In particular, the first region and the second region of the connecting element are designed as separate components. For example, the first region is formed integrally or monolithically with the flange region. This offers the advantage that the geometry of the second region can be adapted to the body geometry of the corresponding type of vehicle without also having to adapt the first region. This significantly reduces the production costs of the connecting element.

[0019] According to another embodiment, the first area and the second area of ​​the connecting element are connected together by a connection that can be released non-destructively. Preferably, the releasable connection is designed so that the first area and the second area of ​​the connecting element can be separated non-destructively. The releasable connection is, for example, a form fit, a force fit and / or a substance-to-substance adhesive connection, in particular a snap connection, a latch connection, a clamp connection, a threaded connection or an adhesive connection. For example, the first area and the second area of ​​the connecting element are connected together by a non-releasable connection, in particular a connection that cannot be released non-destructively. The non-releasable connection, in particular a connection that cannot be released non-destructively, is, for example, a crimp connection and / or a friction welded and / or ultrasonic welded connection.

[0020] The releasable connection of the first and second regions of the connecting element preferably comprises two connecting regions, in particular connecting regions arranged spaced apart from each other. At least one connecting region is preferably designed as a snap-on connection with at least two hooks. For this purpose, for example, the first region of the connecting element has at least one or more protrusions formed on its inner surface and extending radially inwards, in particular forming hooks. The second region has, for example, protrusions on its outer surface, which are preferably formed in a complementary manner to the protrusions of the first region. The protrusions of the first and second regions preferably abut against each other to form a snap-on connection.

[0021] According to another embodiment, the second region has a spring element, which is designed and arranged to exert an axial elastic force on the second region. The spring element is, for example, part of the second region and is made of a plastic, reversibly deformable material. The spring element is preferably designed as a radially outward protrusion of the second region. The spring element is preferably formed on the outer surface of the second region, in particular with a triangular cross section. The spring element preferably has a contact surface, which faces the threaded sleeve in the axial direction, in particular close to the inner surface of the flange region. The spring element and the protrusion of the second region are preferably arranged axially spaced from each other.

[0022] In order to fix the second region to the first region of the multi-part connecting element, the second region is preferably moved axially from above to the first region so that the protrusion of the second region moves in the axial direction beyond the protrusion of the first region and the spring element abuts against the recess on the inner surface of the flange region. Preferably, the spring element is designed and arranged such that it exerts an axial spring force on the second region away from the spring. This results in a stable connection between the protrusion of the first region and the protrusion of the second region.

[0023] According to a further embodiment, the connection area has an undercut which is formed by crimping the threaded sleeve onto the connection element. In particular, the undercut is designed as a groove, preferably formed in the first area or flange area of ​​the connection element. The undercut is preferably formed at the transition between the flange area and the first area.

[0024] The connection of the threaded sleeve and the connecting element is preferably designed as a crimp connection, wherein the threaded sleeve is crimped onto the connecting element made of plastic. During the crimping process, a plastic slice is removed from the connecting element, and this removal process has caused the formation of an undercut.

[0025] According to a further embodiment, the outer surface of the connecting element has a plurality of ribs extending in the axial direction. Preferably, a ribbed surface is formed on each of the outer surfaces of the first region and / or the second region of the connecting element. Preferably, a plurality of ribs extending in the axial direction are formed on the outer surface of the first region and / or the second region of the connecting element. These ribs preferably extend parallel to each other and are in particular all or partly identical. Preferably, the ribs have a width extending in the circumferential direction, in particular a width that increases continuously in the direction of the flange region. This helps to form a crimp connection in a simple manner, in particular between the first region and the threaded sleeve, and / or between the second region and the vehicle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention is explained in detail below based on multiple embodiments in conjunction with the accompanying drawings:

[0027] Figure 1 A schematic diagram of a height adjustment system for a vehicle chassis according to an example embodiment, viewed from a rear perspective, is shown.

[0028] Figure 2 A schematic longitudinal cross-sectional view of a height adjustment system according to another example embodiment is shown.

[0029] Figure 3 A schematic longitudinal cross-sectional view of a spring seat according to another example embodiment is shown.

[0030] Figure 4 A detail portion of a schematic longitudinal cross-sectional view of a spring seat according to another example embodiment is shown.

[0031] Figure 5 A schematic side view of a connection element according to another example embodiment is shown. DETAILED DESCRIPTION

[0032] Figure 1 A height adjustment system for a vehicle chassis is shown. The height adjustment system 10 comprises a spring 12, which is usually designed as a helical (compression) spring or a truncated cone spring, in particular with a plurality of coils. Preferably, the spring 12 has a constant inner diameter and / or outer diameter. In addition, the height adjustment system 10 comprises a spring seat 14, on which one end of the spring 12 rests. The spring is mounted in such a way that the two ends are connected to their respective spring seats, Figure 1 Preferably, the second spring seat not shown may be non-adjustable or formed identically to the spring seat 14 described below.

[0033] The spring seat 14 is preferably connectable to the vehicle body. Figure 1 For example, Figure 1 1 , a wheel suspension element 16 is shown, such as a transverse link, for example, to which a shock absorber 18 is connected. The spring 12 is preferably also connected to the wheel suspension, in particular mechanically in parallel with the shock absorber 18. The spring seat 14 comprises, for example, a threaded sleeve 20, which extends coaxially with the spring 12. For example, the inner diameter of the spring 12 is greater than or equal to the outer diameter of the threaded sleeve, so that the spring 12 is connected circumferentially around the threaded sleeve 20. The threaded sleeve 20 preferably extends from one end of the spring 12 along the central axis into it, preferably extending about 25%-50%, in particular 30%-40% of the axial length of the spring 12. The threaded sleeve 20, for example, has an external thread, which is preferably formed on the threaded sleeve at least partially or over the entire outer circumferential surface.

[0034] The spring seat 14 further comprises a threaded ring 22, against which the end of the spring 12 rests. The threaded ring 22, which is also called a spring disk, preferably has an internal thread, which is formed on at least part of or the entire inner surface of the threaded ring 22. The threaded ring 22 is preferably formed as a circular ring, whose internal thread interacts in particular with the external thread of the threaded sleeve 20 to form a threaded connection. For example, the threaded ring 22 has a radially extending surface in the direction of the spring 12 and the spring 12 rests against this radially extending surface, so that the threaded ring 22 forms an axial stop for the spring 12. Preferably, the threaded sleeve 20 is connected in a static manner, and the threaded ring 22 is connected movably in the axial direction relative to the threaded sleeve 20, so that the axial position of the threaded ring 22 on the threaded sleeve 20 is adjustable. A change in the position of the threaded ring 22 on the threaded sleeve 20 preferably leads to a change in the preload of the spring 12 and / or a change in the distance of the wheel suspension from the vehicle body.

[0035] The spring seat 14 also preferably comprises a connecting element 24 for connecting the threaded sleeve 20 to the vehicle body. The connecting element 24 is preferably made of plastic. Preferably, the plastic is a glass fiber reinforced plastic or a carbon fiber reinforced plastic. In particular, the connecting element 24 is made of a material containing 15% to 70%, in particular 30% to 60% glass fiber, and the remainder is preferably partially or completely formed of plastic. The connecting element 24 is preferably produced by an injection molding process.

[0036] The threaded sleeve 20 and / or the threaded ring 22 are preferably made of metal, in particular steel or aluminum. Preferably, the connecting element 24 is fixedly connected to the threaded sleeve 20, in particular by form fit, force fit and / or substance-to-substance adhesion. For example, the connecting element 24 is connected to the threaded sleeve 20 by means of a crimp connection.

[0037] Figure 2 Shows Figure 1 Detailed schematic diagram of the spring seat 14 in FIG. 1 , identical elements are provided with the same reference numerals. The connecting element 24 is, for example, substantially sleeve-shaped, in particular hollow cylindrical. Preferably, the connecting element 24 has a first hollow cylindrical region 26, which is completely or partially located inside the threaded sleeve 20. For example, the outer diameter of the first region 26 is slightly larger than the inner diameter of the threaded sleeve 20, so that a crimp connection is formed between the connecting element 24, in particular the first region 26 of the connecting element 24, and the threaded sleeve 20. The first region 26 of the connecting element 24 preferably has a constant inner diameter and / or outer diameter over the axial length.

[0038] The connecting element 24 has, for example, a flange region 28 which is connected to the first region 26 of the connecting element 24 and has a larger outer diameter than the first region 26 of the connecting element 24. The flange region 28 preferably adjoins the end of the first region 26 of the connecting element 24 facing the vehicle body and preferably extends in the axial and radial direction beyond the threaded sleeve 20. The flange region 28 preferably has an axial surface facing in the direction of the spring and extends radially beyond the threaded sleeve, in particular forming a contact surface for the threaded ring 22.

[0039] The connecting element 24 has, for example, a second sleeve-shaped, in particular hollow-cylindrical, region 30, which preferably extends coaxially with the first region 26 and the flange region 28. The second region 28 preferably projects at least partially or completely axially beyond the threaded sleeve 20. In particular, the inner diameter of the second region 30 is smaller than the inner diameters of the first region 26, the flange region 28 and the threaded sleeve 20. For example, the outer diameter of the second region 30 is smaller than the outer diameters of the first region 26, the flange region 28 and the threaded sleeve 20. The second region 30 preferably adjoins the end region of the first region 26 facing away from the spring 12 and, for example, extends at least partially into the threaded sleeve 20. The outer diameter of the second region 30 is preferably spaced apart from the inner diameter of the first region 26 and / or the inner diameter of the flange region 28, so that an annular space is formed, in particular between the second region 30 and the first region 26 and the flange region 28.

[0040] Preferably, the second region 30 has a constant inner and / or outer diameter in the axial extent. A base disk 32 is arranged, for example, between the first region 26 and the second region 30 of the connecting element 24, in particular in the form of a disk and extending over the entire diameter of the connecting element 24. The base disk 32 preferably forms an axial separation of the first region 26 and the second region 30 of the connecting element 24. The connecting element 24 is preferably formed in one piece or as a whole.

[0041] The threaded ring preferably has an anti-rotation device 34 known from the prior art.

[0042] Figure 3 Another example embodiment of the spring seat 14 is shown, with Figure 2 In contrast to the spring seat 14 in FIG. 1 , the spring seat 14 has a two-part connecting element 24. The first region 26 of the connecting element 24 is designed as a separate component from the second region 30 of the connecting element 24. For example, the second region 30 is connected to the first region 26 via a releasable connection. Preferably, the releasable connection is designed such that the connection between the first region 26 and the second region 30 is non-destructively separable or not non-destructively separable. The releasable connection is, for example, a form fit, a force fit and / or a material-to-material adhesive connection, in particular a latching connection, a clamping connection, a screw connection or an adhesive connection.

[0043] The releasable connection of the first area 26 and the second area 30 of the connecting element 24 comprises, for example, two connecting areas, which are in particular arranged at intervals. The first connecting area 38 is designed, for example, as a snap-in connection with at least two snaps.

[0044] The first region 26 of the connecting element 24 has, for example, at least one or more protrusions 36, in particular snap-fits formed on the inner surface of the first region 26 and directed radially inwards. The protrusion 36 is preferably annular and, in particular, extends along the entire inner circumference of the first region 26 of the connecting element 24. For example, the protrusion 36 has a triangular cross section. In particular, the protrusion 36 is formed in such a way that it forms a contact surface 42, which preferably faces the spring 12 in the axial direction. The second region 30 has, for example, a protrusion 40, formed on the outer surface of the second region 30 and preferably formed in a complementary manner to the protrusion 36 of the first region 26. The protrusion 40 of the second region 30 preferably has a contact surface 44, which faces away from the spring 12 in the axial direction and, in particular, abuts against the contact surface 42 of the first region 26. The protrusion 36 of the first region 26 and the protrusion 40 of the second region 30 preferably form a snap-fit ​​connection.

[0045] The second region 30 has, for example, a spring element 46, which is designed as a radially outward protrusion. The spring element 46 is preferably formed on the outer surface of the second region 30, in particular with a triangular cross section. The spring element 46 preferably has a contact surface, which faces the threaded sleeve 20 in the axial direction, for example, against the inner surface of the flange region 28. For example, a groove complementary to the contact surface of the spring element 46 is formed on the inner surface of the flange region 28, and the spring element 46 is received in the groove. The spring element 46 and the protrusion 40 of the second region 30 are preferably arranged spaced apart from each other in the axial direction.

[0046] In order to fix the second area 30 to the first area 26 of the connecting element 24, the second area is preferably moved axially from above into the first area so that the protrusion of the second area 30 exceeds the protrusion 36 of the first area 26 in the axial direction and the spring element 46 abuts against the groove of the inner surface of the flange area 28. Preferably, the spring element 46 is designed and arranged to be able to apply a spring force to the second area in a direction axially away from the spring 12. In this way, a firm connection between the protrusions 36, 40 of the first area 26 and the second area 30 can be ensured. The spring element 46 is preferably made of a plastic, reversibly deformable material.

[0047] Figure 4 Shows Figure 3 FIG. 1 is a detailed view of the central spring seat 14 , with the same reference numerals being used for the same elements. Figure 4 Only the first region 26 of the connecting element 24 and the threaded sleeve 20 are shown. The first region 26 of the connecting element 24 is preferably fixedly connected to the threaded sleeve 20. Figure 4 In the illustrated mounted state, the connecting element 24 is connected to the threaded sleeve 20 , the connecting element 24 , in particular the first region 26 of the connecting element 24 , having an undercut 48 in the form of a groove.

[0048] The connection of the threaded sleeve 20 to the connecting element 24 is preferably designed as a crimping connection, wherein the threaded sleeve 20 is crimped onto the connecting element 24, which is made of plastic. During the crimping process, plastic slices are removed from the connecting element 24, and the removal process forms an undercut 48. The undercut is preferably formed in the flange area 28, in particular at the transition between the flange area 28 and the first area 26. Preferably, the undercut 48 extends at least partially or completely in the circumferential direction. In particular, the undercut 48 is formed directly between the end side of the threaded sleeve 20 and the axial surface of the flange area 28 facing the threaded sleeve 20.

[0049] Figure 5 A side view of a connecting element 24 is shown, which is, for example, integrally formed or made in multiple parts. The first region 26 and the second region 30 of the connecting element 24, for example, have a ribbed surface formed on the outer surface. Preferably, a plurality of ribs 50 extending in the axial direction are formed on the outer surface of the first region 26 and the second region 30 of the connecting element 24. The ribs 50 are preferably parallel to each other and, in particular, are all or partly identical. Preferably, the ribs 50 have a width extending in the circumferential direction and, in particular, a width that increases continuously in the direction toward the flange region 28.

[0050] The second region 30 of the connecting element 24 is preferably designed to be connectable to the body of the vehicle. In particular, the second region 30 is designed to be connectable to the body via a plug connection or a crimp connection.

[0051] Description of Reference Numerals

[0052] 10 Height adjustment system

[0053] 12 Spring

[0054] 14 Spring seat

[0055] 16 Wheel suspension elements

[0056] 18 Shock absorber

[0057] 20 Threaded sleeve

[0058] 22 Threaded ring

[0059] 24 Connecting elements

[0060] 26 First area of ​​connecting element

[0061] 28 Flange area

[0062] 30 Second area of ​​connecting element

[0063] 32 Base plate

[0064] 34 Anti-rotation device

[0065] 36 Protrusion

[0066] 38 First connection area

[0067] 40 protrusion

[0068] 42 contact surface of the first region 26

[0069] 44 contact surface of the second region 30

[0070] 46 Spring element

[0071] 48 Lower incision

[0072] 50 ribs.

Claims

1. A height adjustment system (10) for a chassis of a motor vehicle, comprising: Spring (12), A spring seat (14), one end of which abuts against the spring (12), and the spring seat (14) comprises: - a threaded sleeve (20) coaxially attached to said spring (12) and having an external thread, and a threaded ring (22) attached to the threaded sleeve (20) and having an internal thread interacting with the external thread of the threaded sleeve (20), The characteristic is that The spring seat (14) has a connecting element (24) which is attached to the threaded sleeve (20) for connecting the spring seat (14) to a motor vehicle body.

2. The height adjustment system (10) according to claim 1, wherein the connecting element (24) is made of plastic.

3. The height adjustment system (10) according to any of the preceding claims, wherein the threaded sleeve (20) and / or the threaded ring (22) are made of metal.

4. The height adjustment system (10) according to any of the preceding claims, wherein the connecting element (24) is connected to the threaded sleeve (20) in a positionally fixed manner, in particular by a crimping connection.

5. The height adjustment system (10) according to any of the preceding claims, wherein the connecting element (24) has a first region (26) which is arranged completely or partially within the threaded sleeve (20).

6. The height adjustment system (10) according to any of the preceding claims, wherein the connecting element (24) has a flange area (26) which forms a contact surface for the threaded ring (22).

7. The height adjustment system (10) according to any of the preceding claims, wherein the connecting element (24) has a second region (30) whose inner diameter is smaller than the inner diameter of the first region (26) of the connecting element (24).

8. The height adjustment system (10) according to any one of claims 5 to 7, wherein the connecting element (24) is integrally formed or monolithically formed.

9. The height adjustment system (10) according to any one of claims 5 to 7, wherein the first region (26) of the connecting element (24) is designed as a separate component from the second region (30) of the connecting element (24).

10. The height adjustment system (10) according to claim 9, wherein the first region (26) and the second region (30) of the connecting element (24) are connected together by a non-destructively separable connection.

11. The height adjustment system (10) according to claim 9 or 10, wherein the second region (30) has a spring element (46) which is designed and arranged to exert an axial spring force on the second region.

12. The height adjustment system (10) according to any of the preceding claims, wherein the connection region (24) has an undercut (48) which is formed by a crimped connection of the threaded sleeve (20) to the connection element (24).

13. The height adjustment system (10) according to any of the preceding claims, wherein the outer surface of the connecting element (24) has a plurality of ribs (50) extending in the axial direction.

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