WO2016026660A1

WO2016026660A1 - System and method for reversibly fastening a stud axle to a link axle

Info

Publication number: WO2016026660A1
Application number: PCT/EP2015/067298
Authority: WO
Inventors: Martin Keller; Jurjen Geert VAN DER WERF
Original assignee: Volkswagen Aktiengesellschaft
Priority date: 2014-08-19
Filing date: 2015-07-28
Publication date: 2016-02-25
Also published as: CN106660420A; DE102014216408A1; CN106660420B

Abstract

The invention relates to a system for reversibly fastening a stud axle to a link axle of a motor vehicle, which system comprises a substantially cylindrical stud axle and a first retaining device for retaining the stud axle. The first retaining device comprises an axle sleeve having a longitudinal axis, which can be arranged on a longitudinal link of a link axle and fastened to said longitudinal link. The axle sleeve has a holder, which is open outward at least to one side in the direction of the longitudinal axis and into which a first region of a stud axle can be inserted substantially without play. The first region of the stud axle and the holder are designed in such a way that the first region can be reversibly fastened in the holder.

Description

description

System and method for the reversible attachment of a journal on a handlebar axle

The invention relates to a system for the reversible attachment of a journal on a handlebar axle of a motor vehicle, comprising a substantially cylindrically shaped axle journal and a first holding device for holding the axle journal. Furthermore, the invention relates to a corresponding method for the reversible attachment of a journal on a handlebar axis of a motor vehicle.

Wheel suspensions provide a connection between the vehicle body and wheels and must absorb high static and dynamic forces. In modern vehicle axles, such. As torsion beam axles, a wheel carrier designed for mounting a wheel is arranged on a journal of the vehicle axle. The journal is at the

Twist-beam axle held. Since the journal is often exposed to great forces and moments during operation, it may happen that this must be replaced, for. B. within a given maintenance interval, after extreme stress or other damage.

Furthermore, it is an objective of many motor vehicle manufacturers to construct motor vehicles with the lowest possible C0 ₂ emissions or fuel consumption, in order to conquer new markets or to gain advantages in existing markets compared to competitors or to comply with legal requirements. In addition to properties of a drive of the

Motor vehicle, the total weight is an essential factor on which the C0 ₂ emissions depends. Therefore, any reduction in vehicle weight also means a reduction in CO ₂ emissions, so that the lowest possible vehicle weight is now a key criterion in the design of motor vehicles.

Axle pins are known which have a first plate-shaped mounting flange, which can be screwed to a second plate-shaped mounting flange of a handlebar. Thus, the journal is detachably mountable on a handlebar. The mounting flanges often have a thickness of about 10 mm and therefore have the disadvantage that they have a relatively large weight and thus increase the weight of the motor vehicle excessively. An increased vehicle weight leads to increased C0 ₂ emissions. Furthermore, the requires Production of mounting flanges a relatively high cost of materials and thus leads to increased production costs.

US Pat. No. 7,854,439 shows a journal having a longitudinal axis, a maximum diameter and a header, the header extending in a direction transverse to the longitudinal axis by a multiple of the maximum diameter of the journal. In the head piece, three blind holes are arranged with an internal thread for releasably securing the journal to a handlebar by means of a screw. Such a device has the disadvantage that the head piece of the axle journal has a relatively large weight and thus likewise leads to an increased CO 2 emission and to increased production costs.

From EP-Patent 1 380 455 a journal is known, wherein for saving weight of the trailing arm has no mounting plate. The journal is inserted into a receptacle of a handlebar and welded to it. For better mounting of the axle journal has a mounting flange, which limits insertion of the journal into the receptacle in one direction and smaller dimensions than conventional, screwed

Has mounting flanges. Such a device in turn has the disadvantage that in case of failure of the axle journal, the complete handlebar must be replaced.

Therefore, it is the object of the present invention to provide a system and a method for fixing a journal on a handlebar axle, which at least partially do not have the above disadvantages.

This object is achieved by a system according to claim 1 and a method according to claim 10. Further features and details of the invention will become apparent from the dependent claims, the description and the drawings. In this case, features and details that are described in connection with the connecting element according to the invention, of course, also in connection with the device according to the invention and in each case vice versa, so that respect. The disclosure of the individual aspects of the invention is always reciprocal reference or can be.

Accordingly, the object is achieved by a system for reversible attachment of a journal on a handlebar axle of a motor vehicle, the one in the

Has substantially cylindrically shaped axle journal and a first holding device for holding the axle journal. The first holding device has an axle sleeve with a longitudinal axis, which can be arranged on a trailing arm of a handlebar axis and on this can be fixed. The axle sleeve has an at least to one side in the direction of the longitudinal axis outwardly open receptacle into which a first portion of a journal in the

Essentially free of play is introduced. The first region of the journal and the receptacle are designed such that the first region is reversibly fixable in the receptacle.

The system is designed in particular for use on composite link axles, since these have no drive and the axle journals can thus be arranged fixedly against rotation on the torsion beam, in particular the trailing arm.

The first holding device is designed as an axle sleeve, which preferably has substantially the shape of a hollow cylinder which is open at least on one side and has a longitudinal axis. For production reasons, the axle sleeve preferably has a cylindrical

Outer surface on, may alternatively be another outer shape, for. B. have square or polygonal. Angular shapes have the advantage that a relative rotation of axle sleeve and trailing arm is positively prevented.

The trailing arm preferably has a passage into which the axle sleeve is insertable and fixable with the trailing arm. Here is an irreversible connection, such. B. a welded joint, preferably. Alternatively, the axle sleeve may have an outer diameter corresponding to an inner diameter of the passage. The bushing preferably has a cross section which corresponds to an outer cross section of the axle sleeve in the

Substantially corresponds, so that the axle sleeve can be arranged substantially free of play in the implementation.

An inner diameter of the hollow cylinder substantially corresponds to an outer diameter of a first portion of the journal, so that the first portion of the journal

preferably substantially free of play in the hollow cylinder can be arranged. The axle sleeve thus has a receptacle for the first region of the axle journal.

Under reversible attachment is understood in the context of the invention, a releasable fixation. A screw or press connection is therefore solvable while z. Legs

Weld connection represents a non-releasable or irreversible connection.

After arranging and fixing the axle sleeve to the trailing arm, a mechanical machining of the axle sleeve to comply with required position tolerances may be required. The system according to the invention for the reversible attachment of a journal on a handlebar axis has the advantage over conventional systems that the journal can be arranged reversibly on the handlebar axis and that the system has a significant weight reduction compared to conventional systems with one or more mounting plates. Thus, a damaged axle is easily replaceable. Furthermore, C0 ₂ emissions and production costs of the motor vehicle are thereby reduced.

In a preferred embodiment of the invention, the axle sleeve is weldable to the trailing arm or welded to the trailing arm of the handlebar axis. Thus, the

Achshülse on the handlebar axis, such. B. a torsion beam axis, irreversibly fixed. Such a compound is easy and inexpensive to produce and has good strength.

In a first embodiment of the invention, the first portion of the axle journal for fixing to the axle sleeve on an external thread. The journal is thus at least partially inserted into the axle sleeve and reversibly fixed by a screw on the axle sleeve. In this case, the first area of the axle journal z. B. can be passed through the axle sleeve and secured with a nut against loosening of the axle sleeve of this. In this case, it is advantageous if the axle journal has a form-fitting section which limits insertion of the axle journal into the axle sleeve. This has the advantage that the journal can be easily and inexpensively fixed to the axle sleeve and released again.

In a development of the first exemplary embodiment of the invention, the axle sleeve has an internal thread which is designed to mate with the external thread of the axle journal. This has the advantage that the journal is screwed directly to the axle sleeve and an additional nut is not required. In addition, the journal can thus be made somewhat shorter, since this no longer has to protrude from both sides of the axle sleeve. This saves in particular space, material and weight.

Preferably, the first region of the axle journal has such an oversize that the axle journal can be pressed into the axle sleeve and thus can be fixed thereto. One

External threads on the journal and an internal thread of the axle sleeve are therefore no longer required. In this way, the manufacturing steps of the thread production can be saved. Moreover, for a joining of journal and axle sleeve is merely a linear

Relative movement of this along the longitudinal axis of the axle sleeve is required. A relative Twisting of axle journal and axle sleeve for screwing is not necessary. As a result, the assembly of the journal and axle sleeve is facilitated.

More preferably, the system comprises a second holding device for holding a

Braking device on. The second holding device can preferably be arranged on the axle journal or the axle sleeve. In a preferred embodiment, the second holding device is welded to the axle journal. A second holding device has the advantage that it has smaller dimensions and is thus lighter and less expensive than a conventional holding plate of the journal, to which a braking device can be arranged.

It is advantageous that the second holding device is arranged substantially between the axle sleeve and the axle journal. Thus, the second holding device can be safely arranged on the axle sleeve or the axle journal.

Preferably, the axle sleeve on a safety device, with a relative

Turning the journal to Achshülse about the longitudinal axis and / or a relative

Moving the journal to Achshülse along the longitudinal axis can be prevented. This has the advantage that unintentional detachment of the journal from the axle sleeve is prevented in this way.

In an advantageous embodiment of the invention, the securing device has a locking pin with an external thread, which can be introduced through a first recess of the axle sleeve and inserted into a second recess of the axle journal and can be screwed to the axle sleeve and / or the axle journal. Such a safety device has the advantage that it is well fixed to the axle journal or axle sleeve and before

unintentional detachment is secured. Furthermore, such a securing device is easily detachable and thus favors easy disassembly of the axle journal.

Preferably, the axle sleeve has a form-fitting section, which facilitates arranging the axle sleeve when inserted into a passage of a trailing arm relative to the trailing arm, so that a predetermined relative bearing of the axle sleeve to the trailing arm is easier to reach. The form final section is z. B. formed as a centering nose, which can be brought into engagement with a corresponding centering of the trailing arm. This has the advantage that in particular assembly costs can be reduced. In addition, the object is achieved by a method for fixing a journal on a handlebar axis of a motor vehicle. The method comprises the following steps:

Introducing a bushing into a trailing arm of a vehicle axle;

Arranging an axle sleeve in the passage;

Fixing the axle sleeve to the bushing;

Arranging a journal in a receptacle of Achshülse; and

reversible fixing of the journal in the receptacle.

The method according to the invention has the advantage that a stub axle is detachably connected to a handlebar of a vehicle axle and opposite thereto required material

conventional methods is reduced.

In the following, the invention will be explained in more detail with reference to drawings. In the drawings shows schematically:

1 is a side view of an apparatus for reversible attachment of a journal on a handlebar axis according to the prior art,

2 is a side view of an embodiment of a journal according to the invention,

3 shows a perspective view of an embodiment of an axle sleeve according to the invention,

Fig. 4 in a plan view of an inventive system for reversible attachment of a journal on a handlebar axis and

5 shows in a flowchart an embodiment of a method according to the invention for the reversible attachment of a journal on a handlebar axis.

Figure 1 shows a device for reversible attachment of a journal 2 on a handlebar axis 3. From the handlebar axis 3, only part of a trailing arm 7 is shown in this view. The axle journal 2 has a first retaining flange 18, which is arranged on a second retaining flange 19 of the trailing arm 7 and is fixed reversibly on this via a screw connection 20. The screw 20 is in this view by a Dashed line indicated. The first retaining flange 18 is welded to the axle journal 2 and the second retaining flange 19 to the trailing arm 7.

FIG. 2 shows an embodiment of a journal 2 according to the invention in one embodiment

Side view shown. The axle journal 2 has a substantially cylindrical shape with a first front end 22, a second front end 23 and a first region 9 arranged at the first front end. Approximately in a middle of its longitudinal extent, the journal 2 has an annular flange 21 with an outside diameter that is larger than an outside diameter of the first area 9. Thus, the annular flange 21 limits insertion of the axle journal 2 into a receptacle 8 of an axle sleeve 5. The first portion 9 extends from the first end face 22 of the axle journal 2 to the annular flange 21 and has a

External thread 10, which is designed for screwing with an internal thread 1 1 of the receptacle 8. The first region 9 has a second flange adjacent to the annular flange 21

Recess 16 for insertion of a fuse pin 14, not shown a

Safety device 13 on. The second front end 23 is designed to receive a wheel holder.

Figure 3 shows an Achshülse 5 invention in a perspective view. The axle sleeve 5 is formed substantially hollow cylindrical with a wall 24 and has a longitudinal axis 6. The axle sleeve 5 is open on at least one first end face 25 to the outside and thus forms a receptacle 8 for a journal 2 according to the invention, such. B. The axle journal 2 of Figure 2. The receptacle 8 has an internal thread 1 1 for screwing the journal 2 with the receptacle 8 on. The wall 24 has a first recess 15 of a securing device 13. When the axle journal 2 is arranged as intended on the receptacle 8 and the annular flange 21 rests against the axle sleeve 5, the first recess 15 and the second recess 16 form a common channel in the one

Locking pin 14 of the securing device 13 is inserted, thus a relative

To prevent movement of the journal 2 and axle sleeve 5. The axle sleeve 5 is preferably closed at a second end face 26 to prevent ingress of dirt.

FIG. 4 shows a system 1 according to the invention for the reversible attachment of a journal 2 to a link axle 3. The link axle 3 has a trailing arm 7 with a passage 17. In the implementation 17, an axle sleeve 5 is arranged and welded to the trailing arm 7. A first portion 9 of a journal 2 is inserted into a receptacle 8 of the axle sleeve 5 and screwed thereto. The trailing arm 7 has a bore 27 which is substantially concentric with the first recess 15 of the axle sleeve 5 and the second Recess of the journal 2 is arranged and thus forms a common channel. In the common channel, a locking pin 14 is arranged, which prevents a relative movement of Achszapfen2 and axle sleeve 5 substantially. Thus, locking pin 14, first recess 15, second recess 16 and bore 27 are elements of one

Securing device 13. On the axle journal 2 or on the axle sleeve 5, a second holding device 12 for holding a braking device is arranged. The second

Holding device 12 is z. B. arranged on the first portion 9 of the axle journal and clamped in the assembled state between axle sleeve 5 and annular flange 21. Alternatively, the axle sleeve on a saddle for receiving the second holding device 12. Preferably, the second holding device 12 and / or the axle journal 2 and / or the axle sleeve 5 has a form-fitting section in order to prevent a relative rotation of the second holding device 12 to the axle journal 2 or to the axle sleeve 5.

5 shows a method according to the invention for the reversible attachment of a journal 2 to a handlebar axis 3 in a flow chart. In a first

Process step 30 is a passage 17 in a trailing arm 7 of a vehicle axle, z. B. by means of a press introduced. In a second method step 40, an axle sleeve 5 is inserted into the bushing 17 and aligned, preferably by means of a centering device suitable for this purpose. In a third method step 50, the axle sleeve 5 is fixed to the bushing 17, z. B. by a welded joint. In a fourth

Method step 60, a journal 2 is arranged and aligned in a receptacle 8 of the axle sleeve 5. In a fifth method step 70, the journal 2 is reversibly fixed in the receptacle 8, z. B. by a screw or press connection and an optional

Protection scheme.

LIST OF REFERENCE NUMBERS

system

journal

link suspension

first holding device

axle sleeve

longitudinal axis

Trailing arm

admission

first area

external thread

inner thread

second holding device

safety device

safety pin

first recess

second recess

execution

first retaining flange

second retaining flange

screw

annular flange

first front end

second front end

wall

first end face

second end face

drilling

first process step

second process step

third process step

fourth process step

fifth process step

Claims

claims

1 . System (1) for the reversible attachment of a journal (2) to a handlebar axle (3) of a motor vehicle, comprising a substantially cylindrically shaped journal (2) and a first holding device (4) for holding the axle journal (2), characterized

in that the first holding device (4) has an axle sleeve (5) with a longitudinal axis (6) which can be arranged on a trailing arm (7) of a link axle (3) and fixed thereto, wherein the axle sleeve (5) has at least one side has in the direction of the longitudinal axis (6) outwardly open receptacle (8) into which a first region (9) of a

Achszapfens (2) is inserted substantially free of play, wherein the first region (9) of the axle journal (2) and the receptacle (8) are formed such that the first region (9) in the receptacle (8) is reversibly fixed.

2. System (1) according to claim 1,

characterized,

in that the axle sleeve (5) can be welded to the trailing arm (7).

3. System (1) according to claim 1 or 2,

characterized,

the first area (9) of the axle journal (2) has an external thread (10) for fixing to the axle sleeve (5).

4. System (1) according to claim 3,

characterized,

that the axle sleeve (5) has an internal thread (1 1), which for mating with the

External thread (10) of the journal (2) is formed.

5. System (1) according to claim 1 or 2,

characterized,

the first area (9) of the axle journal (2) has such an oversize relative to the receptacle (8) that the axle journal (2) can be pressed into the axle sleeve (5) and thus can be fixed thereto.

6. System (1) according to one of the preceding claims,

characterized,

in that the system (1) has a second holding device (12) for holding a braking device.

7. System (1) according to claim 6,

characterized,

in that the second holding device (12) is arranged substantially between the axle sleeve (5) and the axle journal (2).

8. System (1) according to one of the preceding claims,

characterized,

in that the axle sleeve (5) has a securing device (13) with which relative rotation of the axle journal (2) to the axle sleeve (5) about the longitudinal axis (6) and / or relative displacement of the axle journal (2) to the axle sleeve (6). along the longitudinal axis (6) can be prevented.

9. System (1) according to claim 8,

characterized,

in that the securing device (13) has a securing pin (14) with an external thread (10) which can be guided through a first recess (15) of the axle sleeve (5) and into a second recess (16) of the axle journal (2) and with the axle sleeve (5) and / or the axle journal (2) can be screwed.

10. A method for fixing a journal (2) on a handlebar axis (3) of a

Motor vehicle comprising the steps:

Introducing a bushing (17) into a trailing arm (7) of a vehicle axle; Arranging an axle sleeve (5) in the passage (17);

Fixing the axle sleeve to (5) the bushing (17);

Arranging a journal (2) in a receptacle (8) of the axle sleeve (5); and reversible fixing of the journal (2) in the receptacle (8).