阅读说明：本技术 用于机动车的车轮悬架装置的扭转弹簧组件以及用于机动车的车桥的车轮的车轮悬架装置 (Torsion spring assembly for a wheel suspension of a motor vehicle and wheel suspension for a wheel of an axle of a motor vehicle ) 是由 S·辛德勒 M·恩格尔 于 2018-11-06 设计创作，主要内容包括：本发明涉及一种用于机动车的车轮悬架装置(100)的扭转弹簧组件(10),包括彼此同轴地布置的两根扭杆(12、14)以及与两根同轴的扭杆(12、14)轴线平行地布置的、可通过支承部位(26)支承在机动车车身上的弹簧元件(16),径向靠外的扭杆(12)可支承在机动车车身侧、并且与可固定在车轮引导元件上的从动杆(22)以不能相对转动的方式连接,径向靠内的扭杆(14)以不能相对转动的方式与靠外的扭杆(12)连接、并且通过耦联部(24)以不能相对转动的方式与弹簧元件(16)连接。根据本发明,使弹簧元件(16)支承在耦联部(24)上的弹簧元件支承装置(28)如此构造,使得弹簧元件(16)仅仅被施加以沿切向指向的、平移的移动,并且支承部位(26)构造为固定支承结构。车轮悬架装置(100)的特征在于,在机动车车身和车轮引导元件之间起作用的承载弹簧以扭转弹簧组件(10)的形式来构造。(The invention relates to a torsion spring assembly (10) for a wheel suspension (100) of a motor vehicle, comprising two torsion bars (12, 14) arranged coaxially with one another and a spring element (16) arranged parallel to the axes of the two coaxial torsion bars (12, 14) and supportable on the vehicle body via a support point (26), wherein the radially outer torsion bar (12) is supportable on the vehicle body side and connected in a rotationally fixed manner to a driven bar (22) that can be fixed on a wheel guide element, and the radially inner torsion bar (14) is connected in a rotationally fixed manner to the outer torsion bar (12) and is connected in a rotationally fixed manner to the spring element (16) via a coupling (24). According to the invention, the spring element bearing (28) which bears the spring element (16) on the coupling (24) is designed in such a way that the spring element (16) is only subjected to a translational movement directed in the tangential direction, and the bearing point (26) is designed as a fixed bearing structure. The wheel suspension (100) is characterized in that the support spring acting between the motor vehicle body and the wheel guide element is designed in the form of a torsion spring assembly (10).)

1. A torsion spring assembly (10) for a wheel suspension (100) of a motor vehicle, comprising two torsion bars (12, 14) arranged coaxially with one another and a spring element (16) arranged at a radial distance from the two coaxial torsion bars (12, 14), which is oriented in the axial direction (a) of the torsion bars (12, 14) and can be mounted on the vehicle body by means of a mounting (26), wherein an outer hollow-cylindrical torsion bar (12) viewed in the radial direction (r) can be mounted on the vehicle body side and is connected in a rotationally fixed manner to a driven bar (22) that can be fastened to a wheel guide element, wherein an inner torsion bar (14) viewed in the radial direction (r) is connected in a rotationally fixed manner to an outer torsion bar (12) and is connected in a rotationally fixed manner to the spring element (16) by means of a coupling (24),

it is characterized in that the preparation method is characterized in that,

the spring element (16) is supported on the coupling part (24) by means of a spring element support device (28) which is designed such that the spring element (16) is only subjected to a translational movement directed in the tangential direction (t), and the support point (26) of the spring element (16) on the motor vehicle body side is designed as a fixed support structure.

2. Torsion spring assembly according to claim 1, characterized in that the spring element (16) is configured in the form of a leaf spring.

3. Torsion spring assembly according to claim 2, characterized in that the leaf spring (16) is formed of a metallic material or a fibre composite material.

4. Torsion spring assembly according to any one of the preceding claims, wherein the spring element support means (28) comprises; a movable support element (30) guided in a translatory manner by a guide (36); a first support part (32) connected to the coupling part (24) and to the support element (30); a second support part (34) connected to the spring element (16) and to the support element (30); a conversion device which converts the coupling movement in the form of a rotation into a translational movement of the bearing element (30) and thus of the second bearing part (34).

5. Torsion spring assembly according to claim 4, characterized in that the means for converting a rotary form of the coupling movement into a translatory movement are configured in the form of: and a support device for supporting the coupling part (24) on the support element (30) in a swinging manner.

6. Torsion spring assembly according to claim 5, characterized in that, for the pivotable mounting of the coupling part (24) on the bearing element (30), the coupling part (24) is mounted so as to be pivotable about a first pivot axis (S) oriented parallel to the torsion bars (12, 14)₁) The first support member (30) is supported in a swingable manner, and the first support member (32) is swingably supported about a first swing axis (S)₁) Second parallel pendulum motionAxis (S)₂) Is mounted in a pivoting manner on a support element (30).

7. Torsion spring assembly according to claim 4, characterized in that the means for converting a rotary form of the coupling movement into a translatory movement are configured in the form of: a rubber-metal bearing arrangement arranged between the guide (30) and the first bearing part (32) and/or the second bearing part (34).

8. Torsion spring assembly according to claim 6 or 7, characterized in that the spring element is mounted on the second bearing part (34) so as to be pivotable about a third pivot axis (S3) which is oriented perpendicularly to the torsion bars (12, 14) and perpendicularly to the guide (36).

9. Wheel suspension (100) for the wheels of an axle of a motor vehicle, comprising a carrier spring which acts between the motor vehicle body and a wheel guide element, characterized in that the carrier spring is configured in the form of a torsion spring assembly (10) according to one of claims 1 to 8.

10. Wheel suspension according to claim 9, wherein the wheel suspension further comprises a stabilizer, which is oriented in the transverse direction of the vehicle and is constructed in the form of a hollow cylindrical torsion spring rod (110), characterized in that the torsion spring assembly (10) is arranged locally coaxially within the hollow cylindrical torsion spring rod (110).

11. Wheel suspension according to claim 10, characterized in that in the region of the coaxial nested arrangement of the components, namely the torsion spring bar (110) and the torsion spring assembly (10), are enclosed by a housing (120) which is fixedly supported on the vehicle body side, wherein the torsion spring bar (110) of the stabilizer is supported on the housing (120) and thus on the vehicle body side, the hollow cylindrical torsion bar (12) of the torsion spring assembly (10) is fixedly supported on the housing (120), and the fixed bearing structure (26) associated with the spring element (16) is fixedly supported on the housing (120) and thus on the vehicle body side.

Technical Field

The present invention relates to a torsion spring assembly for a wheel suspension of a motor vehicle of the type stated in the preamble of claim 1 and a wheel suspension for a wheel of an axle of a motor vehicle of the type stated in the preamble of claim 9.

Background

A torsion spring assembly of this type is disclosed in the subsequently published document DE102016217698, which has two torsion bars arranged coaxially with respect to one another and a spring element arranged parallel to the two torsion bars (i.e. oriented in the axial direction (a) of the torsion bars), which spring element is operatively connected to the torsion bars and thus acts in series with the torsion bars with respect to the spring action. The disclosed torsion spring arrangement is characterized in that the spring element is assigned a first adjusting unit for displacing the spring fastening point and/or a second adjusting unit for adjusting the support spring constant. According to the disclosure of DE102016217698, the spring element is primarily applied with a rotational movement, i.e. the spring element is primarily subjected to a torsional load.

Disclosure of Invention

The object of the present invention is to improve a torsion spring assembly for a wheel suspension of a motor vehicle of the type specified in the preamble of claim 1 in order to achieve a construction which reduces costs and complexity.

This object is achieved by the features of the characterizing portion of claim 1 in combination with the features of the front portion of claim 1.

The dependent claims 2 to 8 form advantageous refinements of the torsion spring arrangement according to the invention.

Torsion spring assemblies for wheel suspensions of motor vehicles are known, which comprise two torsion bars arranged coaxially with respect to one another and an additional spring element, which is oriented in the axial direction a of the torsion bars and is arranged parallel to the two coaxial torsion bar axes with a radial spacing and can be supported on the vehicle body via a bearing. In this case, a radially outer, hollow-cylindrical torsion bar, which can be mounted fixedly on the motor vehicle body via a mounting, is connected in a rotationally fixed manner to a driven lever, which can be mounted on the wheel guide element, and the radially inner torsion bar is connected in a rotationally fixed manner to the outer torsion bar in some regions and is connected in a rotationally fixed manner to the spring element via a coupling, so that the spring element acts in series with the torsion bar with respect to a spring action.

In this case, according to the invention, it is provided that the spring element is supported on the coupling part by means of a spring element bearing device which is designed such that the spring element is acted upon only with a translational movement directed in the tangential direction, i.e. perpendicularly to the radial direction r and perpendicularly to the axial direction a, and that the bearing point of the bearing spring element on the vehicle body side is designed as a fixed bearing structure.

The spring element bearing arranged between the spring element and the coupling part, which, due to its design, converts a rotational movement of the coupling part caused by the rotation of the inner torsion bar into a tangentially directed translational movement acting on the spring element, has the effect that the spring element is only subjected to a bending load/deflection and is not subjected to a predominantly torsional load as in the prior art according to DE 102016217698.

The embodiment according to the invention has the advantage that, since the spring element is moved only in translation, the spring element can now be embodied as a pure bending spring, which advantageously enables a simpler and therefore less complex construction of the torsion spring arrangement and thus also a more cost-effective construction of the torsion spring arrangement.

Preferably, the spring element is configured in the form of a leaf spring. In addition to low costs, the embodiment of the spring element in the form of a leaf spring has the additional advantage that the fixed mounting of the leaf spring on the vehicle body side can be realized in a particularly simple and cost-effective manner, for example in the form of a clamping.

The leaf spring may be constructed of a metal material or a fiber composite material.

In a preferred technical embodiment, the spring element support means comprises: a movable, i.e. displaceable support element which is guided in translation in the tangential direction by a guide of the stationary support structure on the motor vehicle side; a first support member connected with the coupling portion and the support element; a second support member connected to the spring element and the support element; and a conversion device which converts a rotational form of the coupling part movement, i.e. a rotational movement of the coupling part caused by a rotation of the second torsion bar, into a translational movement of the bearing element, and thus of the second bearing part.

In this case, according to a first embodiment of the spring element bearing device, the conversion device for converting a rotary-type coupling movement into a translatory movement is configured as follows: and a support device for supporting the coupling part on the support element in a swinging mode. Preferably, for this purpose, the coupling part is pivoted about a first pivot axis S oriented parallel to the torsion bar₁(which is vertically oriented with reference to the guide and thus to the direction of movement of the translation) is swingably supported on a first support member, and the first support member is supported about an axis parallel to the first swing axis S₁Second swing axis S₂Is pivotably supported on the support element.

An alternative second embodiment of the coupling-part-side bearing arrangement provides that the conversion device for converting a rotary-type coupling part movement into a translatory movement is configured as follows: a rubber-metal bearing arrangement arranged between the guide and the first and/or second bearing part. In this embodiment, it is advantageous to ensure a cost-effective design due to the use of the rubber-metal bearing and additionally to ensure acoustic decoupling due to the one or more rubber-metal bearing.

In this case, the spring element is preferably mounted on the second mounting part 34 so as to be pivotable about a third pivot axis S3, which is oriented perpendicularly to the torsion bar and perpendicularly to the guide. This has the advantage that a clamping-free adjustment is ensured.

For the sake of completeness, it is also to be noted that the local fixed connection of the inner torsion bar to the outer torsion bar is preferably formed at an end region of the inner torsion bar opposite the coupling part and is, for example, in the form of a form-locking connection, in particular in the form of a toothing or in the form of a bonded material connection. Furthermore, it is to be noted that the fixed mounting of the outer torsion bar on the motor vehicle side and the fixed mounting of the bearing spring element on the motor vehicle body side are not only directly supported, i.e. the torsion bar or the spring element is directly supported by the mounting on the vehicle body component, but also indirectly, i.e. the bearing structure supporting the torsion bar or the spring element is fixed to a further component, which in turn is fixedly mounted relative to the vehicle body.

Furthermore, the object of the present invention is to improve a wheel suspension for a wheel of an axle of a motor vehicle according to the type specified in the preamble of claim 9 in such a way that a cost-and installation space-saving construction is possible.

This object is achieved by the features of the characterizing portion of claim 9 in combination with the features of the preamble thereof.

The dependent claims 10 and 11 form advantageous refinements of the torsion spring arrangement according to the invention.

The wheel suspension for the wheels of an axle of a motor vehicle according to the invention is characterized in that the support spring acting between the motor vehicle body and the wheel guide element is constructed as a torsion spring assembly according to one of claims 1 to 8. On the basis of the design of the support spring in the form of a torsion spring assembly according to the invention, a structure which is compact as viewed in the vehicle height direction and therefore requires little installation space can be advantageously realized, which, moreover, is less complicated and therefore more cost-effective than the prior art according to DE102016217698 on account of the design of the spring element realized here as a bending spring.

According to a particularly advantageous embodiment of the wheel suspension according to the invention, the wheel suspension further comprises a stabilizer, which is oriented in the transverse direction of the vehicle and is designed in the form of a hollow cylindrical spring rod, wherein the torsion spring assembly is arranged partially coaxially within the hollow cylindrical spring rod. That is, the torsion spring rod of the stabilizer and the two torsion bars of the torsion spring assembly are oriented in the vehicle transverse direction and have a common axis of rotation R due to the coaxially nested arrangement. A particularly space-saving arrangement of the support springs is advantageously achieved due to the coaxially nested arrangement.

In a further advantageous embodiment of the wheel suspension according to the invention, it is provided that in the region of the coaxial nesting of the stabilizer and the support spring, i.e. in the region of the coaxial nested arrangement of the components, i.e. the torsion spring bar and the torsion spring assembly, a housing is provided which is mounted fixedly on the motor vehicle body side and by means of which the components are surrounded in this region. The housing, which is mounted fixedly on the motor vehicle body side, supports not only the stabilizer support structure, which supports the torsion spring bar of the stabilizer, but also the support, which supports the outer torsion bar of the torsion spring assembly, and the spring element bearing, which supports the spring element. In other words, the torsion spring bar, the outer torsion bar and the spring element support device of the spring element are indirectly fixedly supported on the vehicle body structure side by the housing fixedly supported on the vehicle body side.

Drawings

Further advantages and possibilities of application of the invention result from the following description in conjunction with the embodiments shown in the drawings. Wherein:

FIG. 1 shows a schematic cross-sectional view of a torsion spring assembly according to the present invention;

fig. 2 shows a detail of a wheel suspension of a motor vehicle with a support spring configured as a torsion spring bar assembly according to fig. 1;

fig. 3 shows a top view of the wheel suspension according to fig. 2;

fig. 4 shows an oblique view of the wheel suspension according to fig. 2 from above;

fig. 5 shows a side view of the wheel suspension according to fig. 2.

Detailed Description

Fig. 1 shows a torsion spring assembly, generally designated by reference numeral 10, for a wheel suspension of a motor vehicle in a schematic sectional view.

The torsion spring assembly 10 comprises an outer torsion bar 12, viewed in the radial direction r, an inner torsion bar 14 arranged coaxially within the outer torsion bar 12, and a spring element 16, which is embodied in the form of a leaf spring and is arranged axially parallel to the two torsion bars 12, 14 at a radial distance. As shown in fig. 1, the outer torsion bar 12 is fixedly mounted on the motor vehicle body 20 via a bearing 18 and is connected in a rotationally fixed manner to a driven lever 22 which can be fixed on the wheel guide element.

The common axis of the two torsion bars 12, 14 oriented in the axial direction a is denoted in the following by R.

The spring element 16 is connected to the inner torsion bar 14 via a coupling part 24 and is mounted at its end facing away from the coupling part 24 on the motor vehicle body 20 via a mounting bearing 26 and on the coupling part 24 via a spring element mounting 28. The inner torsion bar 14 is fixedly connected to the outer torsion bar 12 at its end region facing away from the coupling 24, so that the torsion bars 12, 14 and the spring element 16 are connected in series in terms of spring action, i.e., the spring element 16 acts in series with the two torsion bars 12, 14 in terms of spring action.

The spring element bearing arrangement 28 is designed such that a rotational movement of the coupling 24, which is caused by a rotation of the inner torsion bar 14 about the axis R, is converted into a translatory movement directed in the tangential direction, which acts on the spring element 16. The translatory movement of the spring lever 16, which extends perpendicularly to the paper in fig. 1, is denoted by reference sign t. It is thus ensured that the spring element 16, which is embodied in the form of a leaf spring, is subjected only to bending loads due to the purely translatory movement of the spring rod 16.

Fig. 2 shows a part of a wheel suspension, generally designated by reference numeral 100, in which the carrier spring is formed by a torsion spring assembly 10.

The wheel suspension 100 comprises a stabilizer, which is oriented in the transverse direction FQ of the vehicle and is designed in the form of a hollow cylindrical torsion bar 110, which is also connected to the driven lever 22 in a rotationally fixed manner, like the outer torsion bar 12 of the torsion spring assembly 10. The driven rod 22 may be secured with the wheel guide member (e.g., guide rod) in a known manner.

Here, as further shown in fig. 2 to 4, the torsion bar 110 of the stabilizer is partially enclosed by a housing 120. The housing 120 can be mounted fixedly on the motor vehicle body via a bearing point 130. The torsion bar 110 is supported on the vehicle body side by a stabilizer support structure disposed in the housing 120.

In torsion bar spring assembly 10, only coupling 24, spring element carrier 28, spring element 16 embodied in the form of a leaf spring, and fastening bearing 26 are visible here; here, the two torsion bars 12, 14 of the torsion bar spring assembly 10, which are arranged coaxially within the torsion bar 110 of the stabilizer, are concealed by a housing 120.

As fig. 2 to 4 show, the fixed bearing structure 26 is embodied in the form of a clamping structure and is supported on the housing 120 and thus fixedly supported on the motor vehicle body. Furthermore, a bearing 18, not visible here, which bears the outer torsion bar 12, is supported on the motor vehicle body by the housing 120.

As can be seen in particular from fig. 2 to 5, the spring element bearing arrangement 28 comprises three bearing components, namely a bearing element 30, a first bearing part 32 connected to the coupling 24 and the bearing element 30, and a second bearing part 34 connected to the spring element 16 and the bearing element 30, wherein the bearing element 30 is guided in a translatory manner in the vehicle height direction FH by a guide 36, which is mounted fixedly on the vehicle body side and is oriented in the vehicle height direction FH.

In order to convert a rotational movement of the coupling 24 about the axis R into a translational movement of the second bearing part 34 and thus of the end of the spring element 16 supported in the bearing 28 oriented in the tangential direction t, i.e., in this case in the vehicle height direction FH, the coupling 24 is supported on the bearing element 30 by means of a pivotably movable bearing structure. For this purpose, the coupling part 24 surrounds a first pivot axis S arranged parallel to the two torsion bars 12, 14 and thus parallel to the axis R₁Is pivotably supported on the first support part 32, and the first support part 32 surrounds a first support axis S parallel to it₁Oriented second bearing axis S₂Is arranged pivotably on the bearing element 30.

In order to avoid clamping, the spring element 16 is also mounted on the second bearing element 34 in a manner pivotable about a third pivot axis S3 (pivot axis) which is oriented perpendicularly to the two torsion bars 12, 14 and perpendicularly to the tangential direction, i.e. perpendicularly to the vehicle height direction FQ.