EP3307571A1

EP3307571A1 - Joint connection and arrangement for mounting a wheel

Info

Publication number: EP3307571A1
Application number: EP16722896.4A
Authority: EP
Inventors: Felix Haeusler
Original assignee: ZF Friedrichshafen AG
Current assignee: ZF Friedrichshafen AG
Priority date: 2015-06-15
Filing date: 2016-05-17
Publication date: 2018-04-18
Also published as: CN107810119A; WO2016202513A1; DE102015210917A1; JP2018519479A; US20180178607A1

Abstract

The invention relates to a joint connection (1) for jointed connection of a first chassis component (2) to a second chassis component (3), comprising a joint body (4) having a center axis (m) and a rotation axis (a), a housing (6) receiving the joint body (4), wherein the joint body (4) is fixable to the first chassis component (2) and the housing (6) is fixable to the second chassis component (3). According to the invention, the rotation axis (a) is arranged eccentrically to the center axis (m).

Description

Articulated connection and arrangement for suspension of a wheel

The invention relates to a hinge connection for the articulated connection of a first and a second component according to the preamble of claim 1. The invention also relates to an arrangement for suspending a wheel on a motor vehicle according to the preamble of claim 12.

Articulated joints are known in particular from the chassis construction for motor vehicles: for example, links of a wheel suspension are connected to one another or to other components of the chassis by means of joints. Ball joints used in practice are in the specialist literature, for example in

"Fahrwerkhandbuch", Bernd Heißing et al., 4th ed., 2013, pages 342 - 356. The ball joint basically comprises a ball joint called a joint body and a housing with an optional ball socket, which receives the ball stud many turning or

Swivel axes and correspondingly many degrees of freedom. The swivel joint (see page 361 of the Fahrwerkhandbuch, Bernd Heißing et al

differ, which has a cylindrical joint body, only one axis of rotation (the cylinder axis) and thus only one rotational degree of freedom. In addition to the ball and swivel joints, rubber mounts are also used in chassis construction for connecting suspension components, cf. Fahrwerkhandbuch, Bernd Heißing et al., Pages 356 - 361. Rubber mounts have a variety of degrees of freedom, however, the displacement is connected by the rubber bearing

Components associated with a certain amount of force and the leadership is not exactly like ball joints. In summary, one can say that

Although ball joints a variety of different rotary and

Swivel movements and rubber bearings allow rotational, swivel and translational movements, but overcoming shear or shear forces of the elastomer. For practical requirements in chassis construction, there are potentials for continuing connection for joint connections.

According to a first aspect of the invention, it is provided in a joint connection of the type mentioned for the articulated connection of suspension components that the Rotary axis of the joint body is arranged eccentrically with respect to its central axis or axis of symmetry. The axis of rotation, which may be formed as a hinge, is offset parallel to the central axis. This results in a rotation of the joint body about its axis of rotation an additional degree of freedom in the form of a translational movement. Such an expansion of the degrees of freedom in a joint connection comes in different requirements in the

Suspension in the chassis construction contrary. Due to the additionally obtained translational degree of freedom also results in a simplification of

Articulated connection, since a second articulated connection can be omitted.

According to a preferred embodiment, at least one fastening means is provided on the joint body at a distance from the axis of rotation, which serves for the introduction and reception of actuating or bearing forces. In the case that a force, z. B. is applied by an actuator, results in a moment about the axis of rotation, which leads to a pivoting of the joint body about the eccentric axis of rotation and thus to a translational movement of the joint body. The arrangement and design of the at least one fastening means results from the respective application.

According to another preferred embodiment, the joint body is as

Ball stud formed, d. H. The articulation is a ball joint with a variety of rotational degrees of freedom. The by the

Articulated interconnected suspension components can thus be pivoted about a plurality of spatially arranged axes of rotation against each other.

According to a further preferred embodiment, the joint body is formed as a cylindrical body or pin, d. H. as a rotary or pivot joint, which has only one axis of rotation and thus only one rotational degree of freedom. Again, there is an advantage an additional translational degree of freedom.

According to another preferred embodiment, this is at least one

Fastening means designed as a pin or bolt, preferably two on a common longitudinal axis arranged bolts are inserted into corresponding holes of the joint body. An actuator can be articulated to these bolts, so that its actuating force can be transmitted to the joint body for generating a torque.

According to a further preferred embodiment, a bearing sleeve arranged coaxially to the axis of rotation is rotatably mounted in the joint body. The bearing sleeve thus forms an eccentrically arranged in the joint body pivot, so that a pivoting of the joint body about the axis of rotation is possible.

According to a further preferred embodiment, plain bearings or rolling bearings are provided between the bearing sleeve and the joint body. As a result, the friction is reduced during the rotational movement between the bearing sleeve and the joint body. Therefore, only small actuating forces are required for the adjustment.

According to a further preferred embodiment, the bearing sleeve is clamped by means of a tie bolt, which passes through the bearing sleeve, with the first component. The bearing sleeve thus acts as an axis which is fixed relative to the first component and allows rotation of the joint body.

According to a further preferred embodiment, the first component as

Subframe of a suspension, particularly preferably one

Automotive rear axle formed. Under subframe, for example, an axle or subframe can be understood, d. H. an intermediate link between the independent suspension and the vehicle frame or the body. The subframe thus serves as a fixed point for the suspension.

According to a further preferred embodiment, the second component as a link, for example, as a wishbone or control arm of a suspension of a

Motor vehicle trained. Thus, the articulated joint according to the invention with eccentrically incorporated rotary joint as an articulated connection between

Subframe and suspension serve. According to a further preferred embodiment, an actuator can be connected to the joint body via the at least one fastening means. The actuating force of the actuator causes a rotational movement and thus a

Translational movement of the joint body. This can be advantageous, for example, in the lane adjustment or steering movement on a rear axle steering.

According to a further aspect of the invention, the toe link of a suspension via the inventive joint on the one hand with the subframe and on the other hand connected to an actuator, wherein the attachment to the subframe via the rotary joint in the joint body. The restoring forces of the actuator are z. B. initiated via bolts on the joint body, bringing about the toe link

Changing the toe angle of the rear wheels can be effected.

According to a further aspect of the invention, it is provided in an arrangement for suspension of a wheel, that one of two wheel-side joints on a four-point link as hinge connection according to the invention, d. H. is formed with an off-axis arranged pivot. The advantage of this arrangement is that a conventional integral link of an integral axis can be replaced by the hinge connection according to the invention. Integral handlebars are known for four-point or trapezoidal link suspensions (see Fahrwerkhandbuch, Bernd Heißing, 4th ed., Page 451 - 452); they form a short additional handlebar

(Intermediate link) between the lower and upper wishbone and serve the

Recording of braking or acceleration torques. This function can take over the articulated joint according to the invention instead of the integral link, and that due to the additional translational degree of freedom. This results in a simplified suspension.

Embodiments of the invention are illustrated in the drawings and will be described in more detail below, which may result from the description and / or the drawing further features and / or advantages. Show it

Fig. 1 shows a hinge connection according to the invention with eccentric

Axis of rotation 2a, the joint connection according to FIG. 1 in cross section in starting position, FIG.

2b shows the hinge connection in the shifted position,

Fig. 3, the hinge joint according to the invention, installed in a

Track control arm of a suspension,

4a shows a hinge connection according to the invention for the connection of a

Four-point link with a wheel carrier of a suspension,

Fig. 4b, the suspension of FIG. 4a with a view towards the inside of the wheel carrier.

1 shows an articulated joint 1 according to the invention between a first component 2 designed as a subframe 2a, 2b of a motor vehicle and a second component 3 of a wheel suspension designed as a link 3 for a motor vehicle. Under the subframe 2, a vehicle-mounted axle carrier can be understood, to which the handlebars of a suspension are articulated. The articulated connection 1 comprises a ball joint formed as a hinge body 4 with a symmetry or central axis m. The joint body 4 has a

spherical portion 4a and two adjacent to the spherical portion 4a cylindrical pin 4b, 4c. The spherical portion 4a is in a

cup-shaped, a plain bearing layer 5 having housing 6, which is connected to the handlebar 3, rotatably received. Of the

Joint body 4 respectively ball studs thus forms with the housing 6 a

Ball joint with rotational degrees of freedom around three spatial axes. Parallel to the

Central axis m and offset by the amount of eccentricity e is a rotation axis a of a rotary joint 7 is arranged. The rotary joint 7 comprises a bearing sleeve 8 and a sliding bearing 9, which is received in a coaxial with the axis of rotation a arranged bore 10 of the joint body 4. The bearing sleeve 8 is penetrated by a tie bolt 1 1, which clamps the bearing sleeve 8 between the sub-frame 2 a, 2 b frontally and thus fixed in a form-fitting manner. The ball pin 4 is due to the pivot bearing 7 in a position to perform a rotary or pivotal movement about the stationary axis of rotation a. The joint body 4 further comprises two arranged on a common longitudinal axis b, as a bolt 12, 13 formed

Attachment, which in corresponding blind holes 14, 15 in the Pins 4b, 4c of the joint body 4 are pressed. The bolts 12, 13 serve as articulation points for an actuator, not shown.

Notwithstanding the illustration in Fig. 1, the joint body 4, in particular the spherical portion 4a may be formed as a cylindrical body with the central axis m as a cylinder axis. Instead of the ball joint so could also be a rotary joint with the axis of rotation m occur.

Next deviating from the illustration in Fig. 1, the component 2 may be formed as a handlebar and the component 3 as a subframe. An actuator (not shown) could then be hinged directly to the component 2; the holes 14, 15 and the

Fixing means 12, 13 could be omitted or by appropriate

Fastener modifications are replaced on the handlebars.

Fig. 2a and Fig. 2b show the hinge joint 1 of FIG. 1, shown in a cross section, in different positions. The piercing point of the axis of rotation a (FIG. 1) through the plane of the drawing is designated A in FIG. 2 a and FIG. 2 b and is regarded as a fixed point, since the rotary joint 7 (FIG. 1) is fixed relative to the auxiliary frame 2 a, 2 b. The piercing point of the central axis m (FIG. 1) through the plane of the drawing is denoted by M. The housing 6, in which the spherical part 4 a of the joint body 4 is received, is surrounded by an annular eye 3 a of the link 3. In the region of the bolts 12, 13, a force F of an actuator, not shown, engages and causes - as shown in FIG. 2b - a pivoting of the joint body 4 about the fixed point A or the fixed axis of rotation a (FIG. 1). The pivoting is recognizable by a beam S, which runs through the fixed point A and is shown in dashed lines, as well as by the displaced position of the bolt 12 '. Due to the pivoting results in a translational movement of the center M from the initial position in Fig. 2a in the direction of the center M 'in Fig. 2b. Simultaneously with the displacement of the center M results in a displacement of the arm 3 in the position 3 ', which is illustrated by the displacement x. The

Thus, in addition to the rotational degrees of freedom due to the ball joint 4a, 6, the articulated connection 1 according to the invention additionally comprises a translatory degree of freedom, which is made possible by the eccentrically arranged rotary joint 7. in the Difference to the initially acknowledged rubber bearings causes the rotary joint 7 only a minimal bearing friction, ie the required for the displacement x actuator force F is relatively low.

Fig. 3 shows a first application example of the invention for a suspension 16 of a rear axle steering of a motor vehicle. The suspension 16 includes a wheel 17, which is pivotally connected to an upper, designed as a wishbone 18 wishbone and a lower, also designed as a wishbone control arm 19 is connected. Both wishbones 18, 19 are - which is not shown - connected to a subframe on the vehicle side. At the wheel carrier 17 engages a toe link 20, which vehicle side, d. H. is connected to the subframe, not shown on the articulated joint 21 according to the invention. The articulated joint 21 according to the invention, which is received by the vehicle-side end of the track link 20, has a

eccentric pivot 21 a and a pin 21 b for the articulation of an actuator 30. The hinge 21 a is fixedly connected to the subframe, not shown. Upon actuation of the actuator, the bolt 21 b pivots about the pivot joint 21 a, so that the control arm 20 carries out a translational movement, which is transmitted to the wheel carrier 17 and this to a rotation about its vertical axis, d. H. causes a change in the toe angle.

FIGS. 4a and 4b show a further application example of the invention for a wheel suspension 22, which is shown in various isometric views. A wheel carrier 23 is connected via an upper transverse link 24 and a lower, designed as a four-point or trapezoidal link 25 wishbone with a subframe, not shown. Further, on the wheel 23 engages a toe link

26 on. The four-point link 25 is connected via two joints with the wheel carrier 23, wherein one of the two joints as inventive

Articulated connection 27 is formed. It is eccentrically arranged

Swivel joint 27a connected to the wheel carrier 23. Due to the articulation

27, the four-point link 25 is capable of, in addition to the three

Rotational degrees of freedom a translational movement in the field of

To perform joint 27. The suspension according to the invention 22nd corresponds to the known from the aforementioned prior art

Trapezoidal link suspension, in which upper and lower wishbones by an additional link, also called integral link, are interconnected. This known integral link, designed as an intermediate coupling, is characterized by the

Replaced articulated joint 27, while maintaining the function, the entire suspension is simplified.

REFERENCE CHARACTERS

articulation

first suspension component

a subframe

b subframe

second chassis component / handlebar 'handlebars, shifted

a handlebar eye

joint body

a spherical area

b pin

c cones

Overlay

casing

swivel

bearing sleeve

bearings

0 bearing bore

1 tie bolt

2 bolts

2 'bolt, moved

3 bolts

4 blind hole

5 blind hole

6 wheel suspension

7 wheel carriers

8 upper wishbone

9 lower wishbone

0 track handlebar

1 joint connection

1 a swivel joint

1 b bolt 22 suspension

23 wheel carriers

24 upper wishbone

25 lower wishbones

26 steering wheel

27 Articulated connection 27a Swivel joint

30 actuator

A pivot point

a rotation axis

b longitudinal axis

M center point

M 'center point, moved m central axis

e eccentricity

F Actuator / actuator s beam

x displacement path

Claims

claims

1 . Articulated connection for the articulated connection of a first chassis component (2) to a second chassis component (3), comprising a joint body (4) with a central axis (m) and an axis of rotation (a), a joint body (4)

receiving housing (6), wherein the joint body (4) on the first chassis component (2) and the housing (6) on the second chassis component (3) can be fastened, characterized in that the axis of rotation (a) eccentric to Center axis (m) is arranged.

2. Articulated connection according to claim 1, characterized in that the

Hinged body (4) at least one spaced apart from the axis of rotation (a) fastening means (12, 13) for receiving actuating or bearing forces (F).

3. Joint according to claim 1 or 2, characterized in that the joint body is designed as a ball pin (4, 4 a).

4. Joint according to claim 1 or 2, characterized in that the joint body (4) is cylindrical.

5. Articulated connection according to claim 2, 3 or 4, characterized in that the at least one fastening means as a pin or pin (12, 13) is formed.

6. Articulated connection according to one of claims 1 to 5, characterized in that in the joint body (4) has a rotatably mounted bearing sleeve (8) coaxial with

Rotary axis (a) is arranged.

7. Joint according to claim 6, characterized in that between the bearing sleeve (8) and the joint body (4) a sliding bearing (9) or roller bearings are arranged.

8. Articulated connection according to claim 6 or 7, characterized in that the bearing sleeve (8) by a bearing sleeve (8) passing through the tie bolt (1 1) with the first chassis component (2, 2a, 2b) is braced.

9. Articulated connection according to one of claims 1 to 8, characterized in that the first chassis component is designed as a subframe (2 a, 2 b) of a wheel suspension of a motor vehicle.

10. Articulated connection according to one of claims 1 to 9, characterized in that the second chassis component as a link (3) of a suspension of a

Motor vehicle is formed.

1 1. Articulated connection according to one of claims 2 to 10, characterized in that an actuator can be articulated to the at least one fastening means or the bolts (12, 13).

12. arrangement (16) for suspending a wheel on a motor vehicle,

comprising a wheel carrier (17), an upper transverse link (18), a lower transverse link (19), a wishbone (20) and an auxiliary frame (2), wherein the upper and the lower transverse link (18, 19) on the one hand with the wheel carrier ( 17) and

on the other hand to the subframe (2), characterized in that the toe link (20) with both the subframe (2) and with an actuator (F) via a hinge connection (1; 21, 21 a, 21 b) after a of claims 1 to 8 is connected.

13. Arrangement according to claim 12, characterized in that the housing (6) received in the toe link (20), the joint body (4) via the bearing sleeve (8; 21 a) with the subframe (2) and the fastening means respectively bolt (12 , 13, 21 b) are connected to the actuator (F).

14. arrangement (22) for suspending a wheel on a motor vehicle,

comprising a wheel carrier (23), an upper transverse link (24), a lower transverse link (25), a wishbone (26) and an auxiliary frame (2), wherein the upper and lower transverse links (24, 25) on the one hand to the wheel carrier ( 23) and

on the other hand connected to the subframe (2), characterized in that the lower arm is formed as a four-point or trapezoidal link (25) and two Wheel-side articulated joints, of which a hinge connection (27) is designed according to one of claims 1 or 3 or 6 or 7 or 8.