Method and toe-in adjustment system for standardized adjustment of toe-in of axle of axle series

Abstract

The invention relates to a method and a toe-in adjustment system (1) for the standardized adjustment of a toe-in adjustment of an axle (2) of an axle series. In a training process step of the method, a transmission assembly (7) of the axle (2) is adjusted into a series of specific K0 positions and is subsequently loaded with a predetermined part of a series of specific predetermined K0 forces. A first toe-in actual value (29) is also detected. Subsequently, 100% of the K0 force is applied to the transmission assembly (7) and a second toe-in actual value (31) is detected. A supplementary adjustment angle ([alpha] 1) is ascertained, which characterizes the difference between the actual toe-in values (29, 31). In addition, a target angle corresponding to the toe-in setting is ascertained for an eccentric element (14, 15) of a setting eccentric unit (12, 13) of the axle (2) in such a way that a setting angle corresponding to the toe-in target value is summed up with the first supplementary setting angle (alpha1), and the eccentric element (14, 15) is rotated by the target angle in a setting process (E) of the method for setting the toe-in setting.

Description

Technical Field

[0001] The invention relates to a method for standardizing the toe adjustment of axles of an axle series. The respective toe adjustment of the axles of the axle series is achieved with the aid of the method without the axles concerned or to be adjusted being installed in a motor vehicle. This means that the method for adjusting the respective axles is part of a method for manufacturing the axles or the motor vehicle. The invention furthermore relates to a toe adjustment system, which is configured for carrying out the method. This means that the toe adjustment system has means for carrying out the method. Furthermore, the invention extends to a computer program having instructions which cause the toe adjustment system to carry out the method. Furthermore, the invention relates to a computer-readable storage medium on which the computer program is stored. Background Art

[0002] At present, the track and camber values ​​of the running gear are adjusted automatically or semi-automatically in the context of axle pre-assembly by means of so-called track-camber adjustment systems. The wheel support forces to be taken into account when adjusting the track and camber values ​​are simulated by spring loading units. By adjusting the toe in / on the track-camber adjustment system, a deviation occurs between the desired track and / or camber value (which should appear in the finished motor vehicle) and the track and / or camber value that appears on the axle connected to the track-camber adjustment system. Another deviation between the desired track and / or camber value and the actual track and / or camber value is caused by the locking (Kontern) of the corresponding adjustment elements of the axle. Therefore, in the axle pre-assembly, the track and camber values ​​are now adjusted in coordination with the preset values ​​that compensate for the deviation. At present, the preset values ​​must be determined empirically and manually trained according to the axle series - partly in multiple control loops. This currently requires highly specialized personnel who determine the reserve values ​​and train the machines involved in the track-camber adjustment each time another axle series, for example for another vehicle or for another vehicle derivative, is to be completed during axle pre-assembly. This does not ensure a constant adjustment quality of the axle, since the quality of the reserve values ​​determined empirically is dependent on the personal experience of the personnel involved.

[0003] DE 10 2011 102 385 A1 discloses a method for adjusting the track width of an axle, in which an eccentric element is released by releasing a locking element for locking the eccentric element with the aid of a tool device held on a robot and guided by the robot. The eccentric element for adjusting the track width is then rotated about its axis of rotation and locked again.

[0004] DE 10 2009 005 889 A1 describes a method for actively adjusting the camber and track of vehicle wheels. To this end, a force acting on the wheel and / or a torque acting on the wheel are measured as measured variables by means of an adjustment device, and the camber and / or track of the wheel are then adjusted as a function of these measured variables. Summary of the invention

[0005] The object of the present invention is to provide a solution for enabling the automatic setting of the toe-in particularly reliably and with a particularly high repetitive quality within the context of axle production.

[0006] This object is achieved by the technical solution of the independent claim. Other possible designs of the present invention are disclosed in the dependent claims, the specification and the drawings. The features, advantages and possible designs described in the scope of the description of one of the technical solutions of the independent claim can be regarded as the features, advantages and possible designs of the corresponding technical solutions of the other independent claims and each possible combination of the technical solutions of the independent claims - if necessary, in combination with one or more of the dependent claims - across types and across implementation forms.

[0007] According to the invention, a method for standardizing the toe adjustment of axles of an axle series is proposed. This means that the purpose of the method is not to adjust the toe on the axle when the axle already forms a component of the motor vehicle in a prescribed installation position. Instead, the method is configured to adjust the toe of the axle before the axle is mounted on the frame of the motor vehicle, for example within the scope of axle manufacturing or after axle manufacturing. The invention furthermore proposes a toe adjustment system, which is configured to implement the method, i.e., to standardize the toe adjustment of axles of an axle series. The toe adjustment system has a mechanism for executing the method. In particular, the toe adjustment system has an EDV control device, i.e., a control device configured for electronic data processing. The invention furthermore relates to a computer program for a control device configured for electronic data processing, in particular a control device for a toe adjustment system. The computer program includes control instructions, which cause the control device, in particular a toe adjustment system having a control device, to implement the steps of the method. Based on the execution or processing of a computer program or its control instructions by means of a control device configured for electronic data processing, these output control instructions representing the steps of the method are provided, wherein the output control instructions are received as input control instructions by the toe setting system. The invention furthermore extends to a computer-readable storage medium, i.e. a data carrier, on which the computer program is stored.

[0008] The method according to the invention has a training process and an adjustment process. The first axle of the axle series to be adjusted is subjected to the training process. This means that in the training process of the method, the training process steps are carried out on the first axle of the axle series to be adjusted.

[0009] Before the training process step, it is particularly provided that, as long as this has not yet occurred, an initial situation is established for the corresponding axle to be adjusted. The initial situation includes a predetermined series-specific wheelbase code, which characterizes the desired toe. Therefore, the wheelbase code particularly contains data that characterizes the toe setpoint value for the axle to be adjusted for the axle series. This means that the wheelbase code has data that, for example, characterizes the wheelbase setpoint value, the wheel camber setpoint value and / or the caster setpoint value. The wheelbase code is predetermined for the method, for example, a training process and / or an adjustment process as a basis or as an input variable. In order to subsequently perform a corresponding toe adjustment on the corresponding axle in the method, an adjustment-related transmission rod of the transmission assembly of the axle or multiple adjustment-related transmission rods of the transmission assembly are adjusted. If the transmission assembly has another transmission rod, in particular such a transmission rod that is not relevant for the toe adjustment, the initial situation is that the fastening of the non-adjustment-related transmission rod is stably fixed, for example, it is screwed. The correspondingly set eccentric unit of the corresponding axle or the corresponding transmission assembly is only pre-tightened according to the initial situation, for example, pre-tightened with a tightening torque of 40 Nm to 120 Nm. Here, the angular position of the corresponding eccentric element of the correspondingly set eccentric unit is undefined.

[0010] The method is designed to be used to implement the toe adjustment on different types of axles, i.e., transmission components. For example, consider multi-link suspensions (especially spatially effective five-link suspensions), integral suspensions, unequal-arm suspensions, blade suspensions, combined suspensions, and other axle types known to those skilled in the art, in which the toe is adjustable. Here, an axle should be understood as a structure that has a corresponding (in the installation position: on the right side of the vehicle and on the left side of the vehicle) wheel suspension or transmission component on each side (in the installation position: on the right side and on the left side of the vehicle). For a simpler description, only one of the sides of each axle is referenced. In particular, the method and the toe adjustment system are provided for adjusting the toe on the rear axle of a rear axle series. It is also conceivable that the method and the toe adjustment system are used to adjust the toe on the front axle of a front axle series. Furthermore, the method and the toe adjustment system can be used to adjust the toe on other axle types, for example, an axle for a commercial vehicle which is arranged between a rear axle and a front axle, etc.

[0011] As described above, the adjustment of the toe can include the adjustment of the wheel camber of the axle. Alternatively or additionally, the adjustment of the toe can include the adjustment of the track of the axle. This means that the method or the toe adjustment system is used for adjusting a series-specific wheel camber adjustment and / or for adjusting a series-specific track adjustment of an axle. Alternatively or additionally, the adjustment of the toe can include the adjustment of the castor value of the axle. In this regard, the method can be used for adjusting a series-specific castor adjustment of an axle. The corresponding toe - which is adjusted on the axle to be adjusted with the aid of the method or with the aid of the toe adjustment system - can have a wheel camber adjustment value, a track adjustment value and / or a castor adjustment value or be formed by corresponding individual values.

[0012] After the initial situation has been established, the axle to be adjusted is brought into the adjustment position, for example connected to the toe adjustment system and / or clamped to the toe adjustment system. For this purpose, for example, the axle bearing of the axle to be adjusted and the toe adjustment system are fastened to one another in such a way that a relative movement between the toe adjustment system and the axle bearing is prohibited. The fixing point of the axle or its transmission assembly on the axle bearing side of the toe adjustment system is therefore defined and arranged fixedly, which means that a movement of the fixing point in relation to the toe adjustment system in all spatial directions (x, y, z) is prohibited in the adjustment position. The fixing point on the axle bearing side is, for example, the articulation point of the axle, at which the uppermost or frontmost transmission rod of the transmission assembly is articulated to the axle bearing.

[0013] In a first training process step, the transmission assembly is adjusted, for example by means of a wheel hub lift of a toe-in adjustment system, into a series-specific K0 position in which the wheel hub of the axle and the fixing point of the transmission assembly on the axle support side are spaced apart from each other in the height direction (z) at a K0 interval. That is, the K0 interval characterizing the series-specific K0 position is specifically predetermined between different axle series, for example vehicle derivatives. By adjusting the K0 interval or by adjusting the transmission assembly into the K0 position, the transmission rod of the transmission assembly is adjusted to a predetermined structural position with respect to the axle support in which the toe-in adjustment can be carried out particularly simply and in particular with a saving in components. For example, the K0 interval can be determined based on the mass of the structure of the motor vehicle in question, so that the K0 interval is present on the axle even in the case where the axle is connected to the frame of the motor vehicle in the prescribed installation position and the motor vehicle is resting on the ground via its wheels as prescribed.

[0014] In the second training process step, the transmission component is loaded with a predetermined part or a predetermined portion of the K0 force that is specifically predetermined in the series, for which, for example, a loading spring of a spring loading unit of a toe setting system can be used. The K0 force simulates the force that the structure of the motor vehicle exerts on the axle installed in the specified installation position based on its mass. In order to be able to adjust or adjust the toe as simply and / or labor-savingly as possible when manufacturing / adjusting the axle, in the second training process step, the transmission component is not loaded with 100% of the K0 force, but with a predetermined part. For example, in the second training process step, the transmission component is loaded with 25% to 45%, in particular 35% of the K0 force. In the second training process step, the first toe actual value is also detected. Detecting the toe actual value should be understood as measuring the corresponding wheel hub or shock absorber bracket inclination with respect to the XZ plane. In other words: in the second training process step, the corresponding toe value, such as the wheelbase value, the wheel camber value and / or the kingpin inclination / castor value, is measured, as this value or these values ​​appear in the adjustment position, and the transmission component is in the K0 position and is loaded with a predetermined part of the K0 force. For this purpose, for example, the angular position of the brake disk, the rim contact surface, etc. can be measured, which represents the angular position of the wheel plane (XZ plane of the respective wheel) in space. The corresponding toe actual value is in particular stored for further methods. In a second training process step, a first force-displacement value pair can also be detected, which characterizes the tensioning displacement of the loading spring until a predetermined portion of the K0 force is reached.

[0015] For and during the third training process step, the transmission assembly is held in the K0 position, wherein the transmission assembly is loaded with 100% of the K0 force by means of the loading spring. In this state, a second toe actual value is detected, which means that the track width, wheel camber and / or caster of the transmission assembly in the K0 position and loaded with 100% of the K0 force are measured. In the third training process step, a second force-displacement value pair can also be detected, which characterizes the tensioning displacement of the loading spring until 100% of the K0 force is reached.

[0016] In a fourth training process step, a first supplementary setting angle is determined as a first reserve value, which characterizes the difference between the first toe actual value and the second toe actual value. This is done in particular according to a predetermined mathematical algorithm. In other words, the first toe actual value and the second toe actual value are compared with one another, wherein the first supplementary angle is directly derived or calculated from the comparison result.

[0017] After the first axle to be manufactured or adjusted has been through the training process, the first axle to be adjusted is subjected to the adjustment process of the method. Within the scope of the adjustment process, the toe is adjusted, i.e., for example, the wheelbase, the wheel camber and / or the caster / caster are adjusted. In order to adjust the toe, a target angle is first determined for the eccentric element of the adjustment eccentric unit of the axle, which target angle corresponds to the desired toe. In other words, the target angle is a specific angle by which the eccentric element is to be rotated in order to produce a predetermined toe-in setpoint value in the adjustment position of the axle, for example, on the axle clamped in the toe-in adjustment system, so that the desired toe-in is produced on the finished motor vehicle. When the eccentric element is rotated by the target angle by means of the adjustment process, the desired toe-in is produced on the finished motor vehicle, which is parked on the ground or stopped on the ground via its wheels, whereby the toe-in setpoint value appears on the axle arranged in the adjustment position. The target angle is determined by summing or adding the setting angle corresponding to the toe setpoint value (toe setpoint value setting angle) to the first supplementary setting angle, i.e. the first reserve value. The first supplementary setting angle is therefore a positive or negative angle starting from the toe setpoint value setting angle. This also applies to the second and third supplementary setting angles, which will be explained in more detail further below.

[0018] Based on this method, it is advantageously possible to adjust axles of the same axle series particularly accurately and with a constant tolerance particularly simply and / or labor-savingly. Here, when adjusting the corresponding toe-in value, the transmission assembly and the eccentric wheel element involved in the toe-in adjustment are advantageously only loaded very lightly, that is, loaded with a predetermined part of the K0 force. Damage to components on the axle is thus avoided. By implementing the adjustment of the axle, and the axle is only loaded with a predetermined part of the K0 force instead of 100% of the K0 force, undesirable deformation and damage of the eccentric wheel unit, especially the eccentric wheel support of the eccentric wheel unit, are effectively avoided. The design / construction of the reinforcement and / or particularly stable eccentric wheel support of the eccentric wheel unit, especially the eccentric wheel support, can be omitted, which is economically advantageous and resource-saving. Because such a reinforced eccentric wheel support requires the entire plate-which has the eccentric wheel support in one piece-to be constructed with a higher wall thickness, a spatially limited or point-type reinforcement or thickening only in the area of ​​the eccentric wheel support is not possible or is only possible with extremely high expenditure. However, sheet metal parts with particularly thick walls run counter to the idea of ​​a motor vehicle that is as light as possible. Likewise, a separately manufactured eccentric support reinforcement means high development effort and additional process steps when manufacturing a conventional axle, both of which are advantageously eliminated due to the adjustment under a portion of the K0 force.

[0019] Furthermore, it is advantageous in the method that the adjustment of the corresponding axle takes place outside the finished motor vehicle, whereby the adjustment of the eccentric unit, in particular its eccentric element, is particularly easily accessible. This allows for the concept of automated toe adjustment to a certain extent, which is already implemented outside the motor vehicle, in particular within the context of motor vehicle production.

[0020] According to another possible embodiment of the method, two further training process steps are implemented between the third training process step and the fourth training process step. On the one hand, after the third training process step, the transmission component is adjusted to a pulse compression position (Pulseeinfederungslage) by means of a wheel hub lift, in which the wheel hub and the fixing point on the shaft support side are spaced apart from each other in the height direction (z) at the pulse peak interval. Subsequently, the transmission component is maintained in the pulse compression position and is loaded with a predetermined pulse compression force by means of a loading spring. The pulse compression force can be a multiple or a part of the K0 force. In addition, it can be provided that a third force-displacement value pair is then detected, which characterizes the tensioning displacement of the loading spring until the predetermined pulse compression force is reached.

[0021] Furthermore, this embodiment includes the following: in the process of setting the method, setting process steps are performed. The first setting process step is a pulse step, in which the transmission component is pulsated or pulsated, in the following manner:

[0022] - adjusting the transmission assembly into the K0 position by means of the wheel hub lift, wherein the transmission assembly is loaded with a predetermined portion of the K0 force by means of a loading spring,

[0023] - adjusting the transmission component into the pulse compression position by means of the wheel hub lift, wherein the transmission component is loaded with a pulse compression force by means of a loading spring,

[0024] The transmission assembly is adjusted back into the K0 position and the transmission assembly is acted upon with a predetermined portion of the K0 force.

[0025] The pulse-like oscillation of the transmission component or the axle can be performed twice or more within the scope of the method, especially the adjustment process, especially directly successively. For example, it can be provided that the transmission component or the axle to be adjusted is pulse-like oscillated five times.

[0026] After the pulse-like oscillation of the transmission component has ended, in a second setting process step, the toe-in output value of the transmission component adjusted to the K0 position and loaded with the K0 force is detected.

[0027] In the third adjustment process step, the locking nut of the eccentric unit is loosened and then tightened with a predetermined pre-tightening torque. The toe adjustment system has, for example, a screwdriver tool for this purpose. The pre-tightening torque is, for example, 10 Nm. The pre-tightening torque can correspond to a predetermined final tightening torque, which will be described more accurately further below. That is, it is provided that the locking nut is first loosened to such an extent that the locking nut and the locking nut support surface are not in contact with each other, but the eccentric element does not fall out of the axle to be adjusted. Subsequently, the locking nut is driven in the tensioning direction so far or to such an extent that the locking nut is screwed onto the locking bolt of the eccentric unit until the locking nut rests on the locking nut support surface and the torque that must act on the locking nut in order to drive the locking nut has reached the predetermined pre-tightening torque. In this way, the locking nut of the eccentric unit is placed in a defined initial position.

[0028] In a fourth setting process step, the eccentric element is rotated by a target angle corresponding to the desired toe-in. In addition, in the fourth setting process step, a third toe-in actual value is detected or measured. In order to rotate or drive the eccentric element, the toe-in setting system has, for example, a further screwdriver tool.

[0029] The fourth setting process step is followed by a fifth setting process step, in which the locking nut is tightened, more precisely, the locking nut is tightened with a predetermined final tightening torque. The final tightening torque is at least equal to the pre-tightening torque or greater than the pre-tightening torque. In addition, a fourth toe-in actual value is detected or measured in the fifth setting process step.

[0030] In a sixth adjustment process step, the transmission rod transmission assembly is loaded with 100% of the K0 force by means of a loading spring and the final toe actual value is detected.

[0031] That is, if the axle is subjected to pulse fluctuations or vibrations when the toe value is set and / or when the axle is manufactured, so that the pre-set toe value changes due to bearing movements, changes in the elastic kinematics of the transmission component, etc., the toe can still be adjusted particularly reliably, with particularly small tolerances and with a particularly high repetition quality.

[0032] In another possible embodiment of the method, it is provided that the target angle is first set to a coarse setting value and then to a fine setting value. This means that the eccentric element is first rotated by a coarse angle which roughly corresponds to the toe-in setpoint value and then by a fine angle which more accurately corresponds to the toe-in setpoint value. It can be provided that the eccentric element is rotated by a coarse angle before the pulse step, that is, before the first setting process step. In particular, it is provided that the coarse setting and the fine setting are carried out within the scope of the fourth setting process step, in particular directly one after the other.

[0033] According to another possible embodiment of the method, an additional adjustment process step is implemented between the fourth adjustment process step and the fifth adjustment process step. First, a second supplementary adjustment angle is determined as a second reserve value, which represents the difference between the third toe-in actual value and the fourth toe-in actual value. Subsequently, the lock nut is loosened and tightened again with a predetermined pre-tightening torque, for example as implemented in the second adjustment process step. In order to adjust the toe, a target angle is first determined for the eccentric element by summing or adding the toe-in setpoint value - the adjustment angle, the first supplementary adjustment angle (i.e., the first reserve value) and the second supplementary adjustment angle (i.e., the second reserve value). The eccentric element is then rotated by the target angle. Subsequently, the lock nut is tightened again with a predetermined final tightening torque.

[0034] In this way, a second supplementary setting angle, which can also be referred to as a locking reserve value, is determined in a particularly reliable manner when adjusting the axle. The toe can therefore be adjusted particularly accurately to the desired toe, since the adjustment of the toe caused by tightening the lock nut is compensated by the second supplementary setting angle when the eccentric element is rotated by a target angle that characterizes the desired toe setting.

[0035] A possible further improvement of the method proposes that after re-tightening the locking nut and before the fifth adjustment process step, the pulse step is performed again, and then the fifth toe-in actual value is detected. In this case, a third supplementary adjustment angle is then determined immediately after the fifth adjustment process step, and the third supplementary adjustment angle is used as the third reserve value. Here, the third supplementary adjustment angle represents the difference between the fourth toe-in actual value and the fifth toe-in actual value. Subsequently, the locking nut is loosened and the locking nut is tightened again with a predetermined pre-tightening torque, as described, for example, in conjunction with the third adjustment process step. In order to adjust the toe, a target angle is first determined for the eccentric element, in which the toe-in setpoint value-adjustment angle, the first supplementary adjustment angle (i.e., the first reserve value), the second supplementary adjustment angle (i.e., the second reserve value) and the third supplementary adjustment angle (i.e., the third reserve value) are summed or added. The eccentric element is then rotated by the target angle. The locking nut is then tightened again with a predetermined final tightening torque. In this way, the toe setting, which is carried out after the pulse-like fluctuations of the axle based on the loading of the drive assembly with 100% of the K0 force, is compensated or eliminated by the third supplementary setting angle, i.e., by the third reserve value. As a result, the toe setting can be adapted even more accurately to the desired toe setting.

[0036] According to another possible embodiment of the method, the adjustment process has a seventh adjustment process step, which follows the sixth adjustment process step. In the seventh adjustment process step, if the last toe actual value and the toe setpoint value deviate from each other by more than a predetermined limit deviation, the third adjustment process step, the fourth adjustment process step, the fifth adjustment process step and the sixth adjustment process step, optionally including sub-process steps, are executed again. The seventh adjustment process step is repeated as often as possible, either until a predetermined number of repetitions is reached or until the last toe actual value and the toe setpoint value deviate from each other by at most a predetermined limit deviation, depending on which condition occurs first. Advantageously, the toe adjustment can be performed even more accurately with the aid of the method in this way.

[0037] According to another possible embodiment of the method - if the adjustment of the toe includes the adjustment of the camber value and the track value - the track adjustment and the camber adjustment of the axle to be adjusted are adjusted in a common adjustment process. For example, it can be provided that the track adjustment and the camber adjustment are adjusted sequentially or at least partially simultaneously in the fourth adjustment process step. The method is thus implemented particularly efficiently, whereby the cycle time for adjusting the toe adjustment is advantageously particularly short.

[0038] In a fourth adjustment process step, in this respect, according to another possible embodiment of the method, provision is made that the camber adjustment is first carried out and subsequently the track adjustment. This is related to the fact that the desired camber adjustment is predetermined with a higher adjustment tolerance than the desired track adjustment. Furthermore, the adjustment of the track and the adjustment of the camber are not carried out independently of one another, since the adjustment of the camber—even if only to a particularly small extent—causes the adjustment of the track or vice versa. In other words, the track and the camber cannot be adjusted completely separately from one another or completely independently of one another. That is, by adjusting the track after the camber adjustment, the camber adjustment is changed but remains within the predetermined tolerances.

[0039] In the method, in another possible embodiment, it is provided that in an axle series, a training process is carried out on a first axle to be adjusted in the axle series, wherein the training process is omitted on a second axle to be adjusted subsequently in the same axle series. In this case, the first supplementary angle of the first axle is used to adjust the toe value of the second axle. The axle referred to as the second axle does not necessarily have to be adjusted directly after the first axle to be adjusted by means of the method. Only for the sake of a simpler representation, the second axle is provided with the corresponding numeral. Accordingly, an adjustment of one or more further axles can be carried out between the adjustment of the first axle and the adjustment of the second axle. In addition, the training process can be omitted for further axles to be adjusted in the same axle series.

[0040] In particular, the method can provide for the training process to be carried out only once for each axle series, namely on the first axle of the axle series to be adjusted. Thus, by omitting the training process for the axles following the first axle to be adjusted, the total time required to adjust all axles of the axle series is significantly shortened.

[0041] Omitting the training process for axles other than the first axle to be adjusted does not conflict with another possible embodiment of the method, according to which it is provided that the training process is repeated for other axles of the axle series, for example the third axle to be adjusted. The axle referred to as the third axle does not necessarily have to be adjusted with the aid of the method directly after the second axle to be adjusted. The third axle is only provided with the corresponding numeral for the sake of a simpler representation. Thus, an adjustment of one or more further axles can be carried out between the adjustment of the second axle and the adjustment of the third axle. Furthermore, the adjustment of the third axle can be carried out between the adjustment of the first axle and the adjustment of the second axle. By repeating the training process once or several times, the first supplementary adjustment angle can always be further improved during the adjustment of the axles of the axle series.

[0042] In general, in the above-described embodiments of the method, provision is made for the first supplementary setting angle and the second supplementary setting angle to be stored and calculated together with the second supplementary angle or the third supplementary angle of the axle to be subsequently adjusted of the same axle series, so that the second supplementary setting angle and the third supplementary setting angle are gradually improved during the course of the method. In particular, a mathematical algorithm is used for this purpose.

[0043] It is understood that the eccentric element can be rotated by a setpoint toe-in setting angle and subsequently the eccentric element can be rotated by one or more supplementary setting angles. Preferably, the toe-in setting is performed by rotating the eccentric element once, more precisely directly by the target angle. For this purpose, the setpoint toe-in setting angle and the one or more supplementary setting angles are calculated relative to each other. If rotating the eccentric element by the setpoint toe-in setting angle comprises, for example, rotating the eccentric element by +90°, wherein the first supplementary setting angle is -2°, the second supplementary setting angle is +5° and the third supplementary setting angle is -1.7°, then the eccentric element can be rotated by the target angle directly or by means of a single rotation of +91.3°. The values ​​are merely exemplary.

[0044] Further features of the invention can be derived from the claims, the drawings and the description of the drawings. The features and feature combinations mentioned above in the specification and the features and feature combinations shown separately in the following description of the drawings and / or in the drawings can be used not only in the respectively given combination, but also in other combinations or alone without departing from the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In the attached picture:

[0046] Figure 1 A schematic diagram of an axle along the longitudinal axis x is shown, wherein the axle is connected to a toe adjustment system for toe adjustment, with the aid of which a method for standardized toe adjustment of axles of an axle series is carried out;

[0047] Figure 2 Shown in Figure 1 A schematic diagram of the axle along the height axis z shown in FIG.

[0048] Figure 3 A flow chart is shown to illustrate the steps of the method.

[0049] In the figures, identical elements and elements having the same function are provided with the same reference symbols. DETAILED DESCRIPTION

[0050] In the following, a method and a toe adjustment system 1 for standardized adjustment of the toe of axles 2 of an axle series are explained in a common description. The steps of the method represent code components or control instructions of a computer program, which cause a control device of the toe adjustment system 1 to implement the method. In other words, the computer program is a control program for the toe adjustment system 1. The program-controlled control device of the toe adjustment system 1 is used to control / regulate the toe adjustment system 1, in particular its tools, manipulators, etc. This means that, based on the execution or processing of the computer program by means of the control device, these output control instructions characterizing the method steps are provided, so that the toe adjustment system 1 is controlled and / or regulated according to the method steps or in order to perform the method steps. The computer program is stored, for example, on a computer-readable storage medium.

[0051] In the following description, a method and a toe setting system 1 for a standard toe setting, which is established on an axle 2 by means of a method or by means of a toe setting system 1, are described using a common wheel track and wheel camber setting as an example. In this example, the wheel track and wheel camber of the axle 2 to be adjusted are set in a common setting process E of the method. Accordingly, setting the axle 2 to a desired toe setting includes setting the desired wheel camber and setting the desired wheel track. The method is provided with a wheel track code SC, which characterizes the desired toe, i.e., the wheel track code SC in this example contains data about a desired wheel camber value and about a desired wheel track value for the axle 2 of the axle series. The wheel track code SC has, for example, a toe setpoint value.

[0052] Figure 1 A schematic diagram of an axle 2 to be adjusted is shown, wherein the axle 2 is adjusted for toe-in (in Figure 1In the example of FIG. 1 , the toe adjustment system 1 is connected to a toe adjustment system 1 , by means of which a method for standardizing the toe adjustment of an axle 2 of an axle series is carried out. Figure 1 In the figure, the longitudinal direction x of the system coordinate system is set to extend vertically into the plane of the drawing. Figure 2 An axle 2 is shown connected to a toe adjustment system 1 for adjusting the toe (in Figure 2 The adjustment system coordinate system can coincide with the coordinate system of the axle and / or the vehicle coordinate system of the motor vehicle to which the adjusted axle 2 is to be equipped.

[0053] The axle 2 is connected to the toe adjustment system 1 for toe adjustment in that the axle bearing 3 of the axle 2 is connected to the axle bearing receptacle 4 of the toe adjustment system 1. The toe adjustment system 1 currently has a wheel hub lift 5, which is provided for moving a wheel hub 6 of the axle 2, in particular in the height direction z. A transmission assembly 7 of the axle 2 connects the wheel hub 6 (via the wheel bearing and the wheel bearing) to the axle bearing 3. A corresponding transmission rod 8 of the transmission assembly 7 is connected not only to the axle bearing 3 but also to the wheel hub 6, so that the wheel hub 6 is articulated to the axle bearing 3 by means of the transmission assembly 7 or by means of the transmission rod 8. The toe adjustment system 1 also has a spring loading unit 9 with a loading spring 10. The spring loading unit 9 is fixedly fixed with an end position on the adjustment system side relative to a housing 11 of the toe adjustment system 1. The axle-side end of the spring-loading unit 9 is connected or connectable to the transmission assembly 7, that is, to one of the transmission rods 8 of the transmission assembly 7, to the wheel hub 6 or to the wheel carrier, so that the axle 2 or the transmission assembly 7 can be loaded with force by means of the spring-loading unit 9. For this purpose, the spring-loading unit 9 is designed to be adjustable in length, in particular retractable and / or extendable. For example, the spring-loading unit 9 has a plunger, which is pressed onto one or more of the transmission rods 8 of the transmission assembly 7, the wheel hub 6 or the wheel carrier when the length is adjusted sufficiently.

[0054] In order to be able to adjust the wheel camber of axle 2 (see Figure 1 ) and wheelbase (see Figure 2 ), the axle 2 has a first adjusting eccentric unit 12 and a second adjusting eccentric unit 13. Here, the first adjusting eccentric unit 12 cooperates with one or more of the transmission rods 8 of the transmission assembly 7, more precisely with the transmission rods 8 that are to be adjusted in order to adjust the wheelbase adjustment of the axle 2. The second adjusting eccentric unit 13 cooperates with one or more of the transmission rods 8 of the transmission assembly 7, more precisely with the transmission rods 8 that are to be adjusted in order to adjust the wheelbase adjustment of the axle 2. The corresponding detailed views of the adjusting eccentric units 12 and 13 are shown in Figure 1 and2 In principle, other / further of the transmission rods 8 can be used for adjusting the track width or wheel camber; within the scope of the method, which of the transmission rods 8 is adjusted is a question of the accessibility of influencing the value to be adjusted or influencing each other.

[0055] It is understandable that the eccentric units 12, 13 are adjusted, although they are Figure 1 or Figure 2 , shown along the Z or X axis - they can also be arranged differently, in particular inclined to one or more of the spatial axes x, y, z. For example, it can be provided that the two adjustment eccentric units 12, 13 extend at least essentially along a common direction in the spatial directions x, y, z, but in this case act on different drive rods of the transmission assembly 7. In addition, the adjustment eccentric units 12, 13 can be arranged parallel to each other. In particular, the two adjustment eccentric units 12, 13 are arranged almost along the X direction. Therefore, the wheel camber or track adjustment (taking the example of a multi-drive rod axle) is produced by the position of the corresponding connected drive rod 8 in space or by the effective length of the corresponding drive rod 8 shown by the adjustment eccentric unit 12 or 13.

[0056] It can be seen that the transmission rod 8 cooperating with the respective setting eccentric unit 12, 13 is adjusted in the transverse direction y of the axle 2 or the toe adjustment system 1 when the respective eccentric element 14, 15 of the respective setting eccentric unit 12, 13 is rotated. As is known, the eccentric element 14, 15 is rotated about the respective eccentric shaft 16, 17. In order to rotate the eccentric element 14, 15, the toe adjustment system 1 has a corresponding screwdriver tool, for example. In order to ensure the toe adjustment, the respective setting eccentric unit 12, 13 has a corresponding lock nut 18, 19, which can be screwed onto the respective associated lock bolt 20, 21 of the respective setting eccentric unit 12, 13. By tightening the lock nut 18, 19 onto the respective lock nut bearing surface 22, 23 of the axle support 3 when screwing onto the lock bolt 20, 21, the respective associated eccentric element 14, 15 is secured against rotation. The toe adjustment system 1 has, for example, an additional corresponding screwdriver tool in order to rotate the lock nuts 18, 19. The axle 2, in particular the axle support 3, furthermore has an eccentric support element 24, on which the corresponding eccentric element 14, 15 abuts, so that the corresponding eccentric element 14, 15 is fixed in position by means of the eccentric support element 24.

[0057] Figure 3To illustrate the method, a flow chart is shown in which the individual steps of the method are carried out. In the training process A of the method, the training process steps A1 to A4 as well as the training process steps A3.1 and A3.2 are carried out on the first axle 2 of the axle series to be adjusted. In the first training process step A1, the transmission assembly 7 of the axle 2 to be adjusted is adjusted into the series-specific K0 position by means of the wheel hub lift 5. In the K0 position, the wheel hub 6, in particular its longitudinal center axis 25 and the axle bearing-side fixing point 26 are spaced apart from each other in the height direction z at the K0 interval 27. The fixing point 26 is, for example, the upper edge of the axle bearing 3, the axle bearing-side articulation point for one or more transmission rods 8, the axle bearing bearing via which the axle 2 and the frame of the motor vehicle are fastened to each other, etc. The K0 spacing simulates in the axle 2 the spacing between the wheel hub 6 and the axle-support-side fastening point 26 which the axle would occupy when the axle 2 is loaded with the mass of the motor vehicle in the intended installation position.

[0058] In a second training process step A2, the transmission component 7 is loaded with a predetermined part of the series-specifically predetermined K0 force by means of the loading spring 10 of the spring loading unit 9. The force application is carried out in particular by means of the spindle of the spring loading unit 9, which presses the loading spring 10 (here for example opposite to the Z direction, that is to say downwards) onto the corresponding transmission rod 8, wheel hub 6 or wheel carrier. In this case, the force flows through the loading spring 10. The part of the K0 force - which is applied to the transmission component 7 in the second training process step A2 - in the present example is 35% of the K0 force. The full K0 force, i.e. 100% of the K0 force, corresponds to a force which acts on the transmission component 7 as long as the axle 2 in question is connected to the frame of the motor vehicle in accordance with the regulations, which motor vehicle is connected via its wheels 28 (at Figure 1 and Figure 2 In the second training process step A2, a first toe-in actual value 29 is also detected and stored. In particular, in the training process step A2, a first force-displacement value pair 30 is also detected, which characterizes a tensioning displacement of the loading spring 10 until a portion of the K0 force is reached.

[0059] In the third training process step A3, the transmission assembly 7 is held in the K0 position. In this case, the transmission assembly 7 is loaded with 100% of the K0 force by means of the loading spring 10. Furthermore, a second toe-in actual value 31 is detected in the third training process step A3, and furthermore, a second force-displacement value pair 32 can be detected in the third training process step A3, which characterizes the tensioning displacement of the loading spring 10 until the K0 force is reached.

[0060] In the present example, a training process step A3.1 follows, in which the transmission component 7 is adjusted by means of the wheel hub lift 5 into a pulse compression position in which the wheel hub 6 and the fixing point 26 are spaced apart from each other in the height direction z at the pulse peak interval. This is followed by a further training process step A3.2, in which the transmission component 7 is loaded with a predetermined pulse compression force by means of the loading spring 10, wherein the transmission component 7 is held in the pulse compression position by means of the wheel hub lift 5. In the training process step A3.2, a third force-displacement value pair 33 can also be detected, which characterizes the tensioning displacement of the loading spring 10 until the pulse compression force is reached. The training process steps A3.1 and A3.2 are carried out after the third training process step A3 and before the fourth training process step A4.

[0061] The third training process step A3, in the present example training process step A3.2, is followed by a fourth training process step A4, in which a first supplementary setting angle α1 is determined, which characterizes the difference between the first toe actual value 29 and the second toe actual value 31. That is, the first toe actual value 29 is measured in the second training process step A2 and the second toe actual value 31 is measured in the third training process step A3 and compared with one another, for example by means of a predetermined mathematical algorithm. Since a rotation of the respective eccentric element 14, 15 by a certain angle causes an adjustment of the transmission rod 8 cooperating with the respective setting eccentric unit 12, 13 in accordance with this rotation, the first supplementary setting angle α1 can be determined. The first supplementary setting angle α1, which is a first reserve value, is provided for compensating for the difference between the toe setting that is achieved when the transmission assembly 7 is loaded with 100% of the K0 force and the toe setting that is achieved when the transmission assembly 7 is loaded with a predetermined part of the K0 force (here 35%). This means that the first supplementary adjustment angle α1 is used to finally adjust the axle 2 to the desired toe setting. To this end, in the adjustment process E of the method for adjusting the desired toe, the corresponding eccentric elements 14, 15 of the corresponding adjustment eccentric units 12, 13 are rotated by a target angle corresponding to the desired toe. The target angle is determined by summing or adding the adjustment angle corresponding to the toe setpoint value (toe setpoint value-adjustment angle) to the first supplementary adjustment angle α1, i.e., the first reserved value. In the adjustment process E, the corresponding eccentric elements 14, 15 are rotated by the target angle. It is understandable that the toe setpoint value does not yet correspond to the desired toe, which should appear in the finished motor vehicle, that is, when the motor vehicle structure stops on the ground via the axle 2 and via the wheels 28. Because in order to achieve this - for example after rotating the respective eccentric element 14, 15 by the toe setpoint setting angle - the respective eccentric element 14, 15 is rotated by the first supplementary setting angle α1, so that the respective eccentric element 14, 15 is finally adjusted to the desired toe setting when the eccentric element 14, 15 is rotated by the target angle. Preferably, the eccentric element 14, 15 is rotated directly by the target angle, i.e. before the eccentric element 14, 15 is rotated, it is calculated based on the first supplementary setting angle α1 how far the eccentric element 14, 15 must be rotated in order to be adjusted directly to the target angle.

[0062] In the method, it is generally provided that the training process A, i.e., in the present example, the training process steps A1 to A4, is carried out at least once on the first axle 2 to be adjusted in the axle series. The training process A can be omitted on one axle, a plurality of axles, or all axles of the axle 2 to be adjusted next in the same axle series. In this case, in order to adjust the toe adjustment on the other axles 2 of the same axle series, a first supplementary adjustment angle α1 is used, which is determined within the scope of the training process A on the first axle 2. This means that it can be provided in the method that the training process A is carried out exactly once, i.e., on the first axle 2 to be adjusted in the axle series. Alternatively, the training process A is repeated on one or more axles of the other axles 2 to be adjusted in the same axle series. For example, it can be provided that the training process A is carried out periodically, for example, every fifth axle 2, every tenth axle 2, etc., wherein the training process A is omitted for the remaining axles 2 to be adjusted.

[0063] If the training process A is carried out before the setting process E, it is provided in the method in particular that the axle 2 to be adjusted is removed from the toe setting system 1 after the fourth training process step A4 and is subsequently reinserted or clamped into the toe setting system 1, for example in order to reset the toe setting system 1. The setting process E is currently implemented as follows: In a first setting process step E1, referred to as a pulse step, the transmission assembly is pulsated or vibrated by first adjusting the transmission assembly 7 to the K0 position by means of the wheel hub lift 5. In this case, the transmission assembly 7 is loaded with a predetermined portion of the K0 force, in this case 35%, by means of the loading spring 10. The transmission assembly 7 is then adjusted to the pulse compression position by means of the wheel hub lift 5, wherein the transmission assembly 7 is loaded with a pulse compression force by means of the loading spring 10. Subsequently, the transmission assembly 7 is adjusted to the K0 position again and loaded with a predetermined portion of the K0 force, in this case 35%. The pulse step is in particular carried out several times in succession at a high frequency, so that the transmission assembly 7 or the axle 2 fluctuates in a pulsed / pulsating manner or the transmission assembly or the axle vibrates. The damping operation of the axle 2 is simulated by the pulsed fluctuation of the axle 2. In other words, forces, moments and pulses with a frequency are simulated when the axle 2 is pulsed, which act or can act on the axle 2 during driving operation in a finished motor vehicle. In the present example, it is provided that the pulse step E1 or the first setting process step E1 is carried out five times directly in succession. Here, for example, the first setting process step E1 also includes the detection of the toe-in output value 34 of the transmission rod transmission assembly 7 which is adjusted to the K0 position and loaded with the K0 force after the pulsating or pulsed fluctuation.

[0064] The first setting process step E1 is followed by a second setting process step E2 , in which the toe output value is detected or measured for further method use.

[0065] In the third setting process step E3, the respective lock nut 18, 19 of the respective setting eccentric unit 12, 13 is loosened, which means that the respective lock nut 18, 19 is unscrewed / unscrewed from the respective lock nut bearing surface 22, 23 along the respective locking bolt 20, 21. Subsequently, the lock nut 18, 19 is driven in the tightening direction so far or so far, that is, the lock nut is screwed onto the locking bolt 20, 21 until the lock nut 18, 19 rests on the respective lock nut bearing surface 22, 23 and the torque that must be applied to the lock nut in order to drive the lock nut 18, 19 has reached a predetermined pre-tightening torque, in the present case 10 Nm. That is, in the third setting process step E3, a defined position or a defined torque of the lock nut 18, 19 is set, so that a rotation of the respective eccentric element 14, 15 can then be achieved.

[0066] In the fourth setting process step E4, the eccentric elements 14, 15 are rotated by a target angle. Also belonging to the fourth setting process step E4 is that after the eccentric elements 14, 15 have been rotated by the target angle, a third toe actual value 35 is detected. In the present example, it is provided that the eccentric elements 14, 15 are first rotated by a coarse angle roughly corresponding to the target angle and then by a fine angle more accurately corresponding to the target angle. This means that the respective eccentric elements 14, 15 are first rotated by a coarse angle corresponding to the toe setpoint value and then finely adjusted in order to accurately adjust the target angle. In particular, the fine adjustment of the eccentric elements 14, 15 can be performed directly after the coarse rotation of the eccentric elements 14, 15. Currently, the wheel camber is first adjusted and then the wheelbase is adjusted.

[0067] In the fifth setting process step E5, the lock nuts 18, 19 are then tightened with a predetermined final tightening torque, thereby inhibiting or preventing a further rotation or adjustment of the eccentric elements 14, 15. In short, the respective eccentric element 14, 15 is locked by tightening the associated lock nuts 18, 19. After the respective eccentric element 14, 15 has been locked, the fourth toe-in actual value 36 is also detected in the fifth setting process step E5.

[0068] In the present example, the fifth setting process step E5 is followed by setting process steps E5.1, E5.2, E5.3, E5.4 and E5.5. After the locking nuts 18, 19 have been tightened with a predetermined final tightening torque and the fourth toe actual value 36 has been detected, in setting process step E5.1, a second supplementary setting angle α2 is determined as a second reserve value. The second supplementary setting angle α2 characterizes the difference between the third toe actual value 35, which was determined in the fourth setting process step E4, and the fourth toe actual value 36, which was determined in the fifth setting process step E5. That is, the toe actual values ​​35, 36 are compared with each other by means of the predetermined mathematical algorithm or by means of another predetermined mathematical algorithm, thereby determining the second supplementary setting angle α2. Then, in setting process step E5.2, the locking nuts 18, 19 are loosened and tightened again with a predetermined pre-tightening torque, as already described in conjunction with setting process step E3. This is followed by an adjustment process step E5.3, in which the eccentric elements 14, 15 are rotated by a target angle. The target angle is determined in advance by summing or adding the toe setpoint value adjustment angle, the first supplementary adjustment angle (α1) and the supplementary adjustment angle (α2). Subsequently, in an adjustment process step E5.4, the lock nuts 18, 19 are tightened again with a predetermined final tightening torque. In the present example, the adjustment process step E5.4 is followed by an adjustment process step E5.5, in which the first adjustment process step E1, i.e. the pulse step, is carried out again, and then the fifth toe actual value 37 is detected.

[0069] In the sixth setting process step E6, which in the present example follows setting process steps E6.1, E6.2, E6.3 and E6.4, the transmission assembly 7 is then loaded with 100% of the K0 force by means of the loading spring 10. In setting process step E6, the final toe actual value 38 is also detected.

[0070] The sixth setting process step E6 is followed by a setting process step E6.1, in which a third supplementary setting angle α3 is determined, which characterizes the difference between the fourth toe-in actual value 36 and the fifth toe-in actual value 37. In a subsequent setting process step E6.2, the lock nuts 18, 19 are then loosened and tightened again with a predetermined pre-tightening torque, as described in conjunction with setting process step E3. In a setting process step E6.3, which follows setting process step E6.2, the eccentric elements 14, 15 are then rotated by a target angle. The target angle is determined in advance in this case by summing or adding the toe-in setpoint value setting angle, the first supplementary setting angle (α1), the second supplementary setting angle (α2) and the third supplementary setting angle (α3). In a setting process step E6.4, the lock nuts 18, 19 are then tightened again with a predetermined final tightening torque.

[0071] As an alternative to directly rotating the eccentric elements 14, 15 directly or unidirectionally by the target angle, it can be provided that the eccentric elements 14, 15 are rotated by the toe-in setpoint setting angle by means of a first rotation. By means of a second rotation, which is performed after the first rotation is completed, the eccentric elements 14, 15 are then rotated by a first reserve value or a first supplementary setting angle α1. After the second rotation is completed, the eccentric elements 14, 15 are then rotated by a second reserve value or a second supplementary setting angle α2 by means of a third rotation. A fourth rotation can then be performed after the third rotation is completed in order to rotate the eccentric elements 14, 15 by a third supplementary setting angle α3. A single supplementary angle rotation following the first rotation is also conceivable, wherein the eccentric elements 14, 15 are rotated by the sum of the supplementary setting angles α1, α2, α3 during the supplementary angle rotation.

[0072] In the present example, the setting process step E6.4 is followed by the seventh setting process step E7, in which it is determined whether the last toe actual value 38 and the toe setpoint value stored in the wheelbase code SC deviate from each other by more than a predetermined limit deviation. If this is the case, the method is re-executed by re-execution of the setting process steps E3 to E6, in particular E6.4. If, however, it is determined in the seventh setting process step E7 that the last toe actual value 38 and the toe setpoint value deviate from each other by at most a predetermined limit deviation, the toe setting of the axle 2 is considered to be finished. In addition, in conjunction with the seventh setting process step E7, a predetermined number of repetitions is provided, which indicates how often the setting process step E7, i.e., the setting process steps E3 to E6, may be re-executed. If a predetermined number of repetitions is reached, wherein the final toe-in actual value 38 and the toe-in setpoint value still deviate from each other by more than a predetermined limit deviation, the corresponding axle 2 is removed from the method, modified if necessary (repair of the threaded parts, in particular the eccentric elements 14, 15, the lock nuts 18, 19, etc.) and, if necessary, supplied again to the method.

[0073] The method described here and the toe setting system 1 illustrate the corresponding possibilities of how toe setting can be carried out automatically particularly reliably and with a particularly high repetition quality and with consistently small tolerance deviations within the scope of series production of axles.

[0074] Reference numerals list

[0075] 1. Toe-in adjustment system

[0076] 2 Axles

[0077] 3-axis support

[0078] 4-axis support housing

[0079] 5-Wheel Lift

[0080] 6 wheels

[0081] 7 Transmission components

[0082] 8 Transmission rod

[0083] 9 Spring loaded units

[0084] 10 Loading spring

[0085] 11 Shell

[0086] 12. First adjustment of the eccentric wheel unit

[0087] 13. Second adjustment of the eccentric wheel unit

[0088] 14First eccentric wheel element

[0089] 15 Second eccentric wheel element

[0090] 16First eccentric wheel shaft

[0091] 17 Second eccentric wheel shaft

[0092] 18 First locking nut

[0093] 19 Second locking nut

[0094] 20First locking bolt

[0095] 21 Second locking bolt

[0096] 22 First locking nut bearing surface

[0097] 23 Second locking nut bearing surface

[0098] 24 eccentric wheel support element

[0099] 25 Longitudinal center axis of the wheel hub

[0100] 26 fixed points

[0101] 27K0 Interval

[0102] 28 wheels

[0103] 29 Actual value of first toe

[0104] 30 First force-displacement value pair

[0105] 31 Actual value of second toe

[0106] 32 Second force-displacement value pair

[0107] 33 Third force-displacement value pair

[0108] 34 Toe output value

[0109] 35 Actual value of fourth toe

[0110] 36 Actual value of fifth toe 37

[0112] A. Training Process

[0113] A1-A4 Steps of the training process

[0114] E Adjustment process

[0115] Steps in the E1-E7 setup process

[0116] SC wheelbase code

[0117] α1 The first supplementary adjustment angle

[0118] α2 Second supplementary adjustment angle

[0119] α3 The third supplementary adjustment angle

[0120] x longitudinal direction

[0121] y horizontal direction

[0122] z height direction

Claims

1. A method for standardizing the toe setting of an axle (2) of an axle series, wherein: In the training process (A) of the method, the following training process steps are carried out on a first axle (2) of the axle series to be adjusted: A1 Using a wheel hub lift (5): the drive assembly (7) of the axle (2) to be adjusted is adjusted into a series-specific K0 position, in which the wheel hub (6) of the axle (2) and the axle support-side fixing point (26) of the drive assembly (7) are spaced apart from each other in the height direction (z) at the K0 distance (27); A2: by means of a loading spring (10): loading the transmission component (7) with a predetermined part of the series-specifically predetermined K0 force and detecting a first toe-in actual value (29); A3: the transmission component (7) is held in the K0 position, wherein the transmission component (7) is loaded with 100% of the K0 force by means of the loading spring (10), and a second toe-in actual value (31) is detected; A4 determines a first supplementary setting angle (α1), which represents the difference between the first toe-in actual value (29) and the second toe-in actual value (31), A target angle corresponding to a toe adjustment of an eccentric element (14, 15) of an eccentric adjustment unit (12, 13) for an axle (2) is determined by summing an adjustment angle corresponding to a toe setpoint value with a first supplementary adjustment angle (α1), and in an adjustment process (E) of the method for adjusting the toe adjustment, the eccentric element (14, 15) is rotated by the target angle.

2. The method according to claim 1, characterized in that The following training process steps are performed between training process steps A3 and A4: A3.1 With the aid of the wheel hub lift (5): the transmission assembly (7) is adjusted into a pulse compression position in which the wheel hub (6) and the fixing point (26) are spaced apart from each other in the height direction (z) at the pulse peak interval; A3.2 holding the transmission component (7) in a pulse compression position, wherein the transmission component (7) is loaded with a predetermined pulse compression force by means of a loading spring (10), and In the setting process (E) of the method, the following setting process steps are implemented; E1 Pulse step, in which the transmission component (7) is pulsated in a pulsed manner, in the following manner: - adjusting the transmission component (7) into the K0 position by means of the wheel hub lift (5), wherein the transmission component (7) is loaded with a predetermined portion of the K0 force by means of the loading spring (10), - adjusting the transmission component (7) into the pulse compression position by means of the wheel hub lift (5), wherein the transmission component (7) is loaded with a pulse compression force by means of a loading spring (10), - adjusting the transmission component (7) again to the K0 position and loading the transmission component with a predetermined portion of the K0 force, E2 detects the toe output value, E3 Loosen the lock nuts (18, 19) of the eccentric adjustment unit (12, 13) and then tighten the lock nuts (18, 19) to the specified pre-tightening torque. E4 rotates the eccentric wheel elements (14, 15) to the target angle and detects the third toe actual value (35). E5 Tighten the lock nuts (18, 19) to the predetermined final tightening torque and detect the fourth toe actual value (36). E6 Load the transmission assembly (7) with 100% of the K0 force using the loading spring (10) and detect the final actual toe value (38).

3. The method according to claim 2, characterized in that The target angle is first set to a coarse setting value and then to a fine setting value.

4. The method according to claim 2 or 3, characterized in that: Between steps E5 and E6 of the setup process: E5.1 Determine a second supplementary setting angle (α2), which represents the difference between the third toe-in actual value (35) and the fourth toe-in actual value (36), E5.2 Loosen the lock nuts (18, 19) and tighten them again to the predetermined pre-tightening torque. E5.3 determining a target angle for the eccentric element (14, 15) by summing the setting angle corresponding to the toe-in setpoint value, the first supplementary setting angle (α1) and the supplementary setting angle (α2), and then rotating the eccentric element (14, 15) by the target angle, E5.4 Tighten the lock nuts (18, 19) to the predetermined final tightening torque.

5. The method according to claim 4, characterized in that Between steps E5.4 and E5 E5.5 The pulse step E1 is implemented again and then the fifth toe actual value (37) is detected. And then adjust the process step E6 E6.1 Determine a third supplementary setting angle (α3), which represents the difference between the fourth toe-in actual value (36) and the fifth toe-in actual value (37), E6.2 Loosen the lock nuts (18, 19) and tighten them again to the predetermined pre-tightening torque. E6.3 determining a target angle for the eccentric element (14, 15) by summing the setting angle corresponding to the toe-in setpoint value, the first supplementary setting angle (α1), the supplementary setting angle (α2) and the supplementary setting angle (α3), and then rotating the eccentric element (14, 15) by the target angle, E6.4 Tighten the lock nuts (18, 19) to the predetermined final tightening torque.

6. The method according to any one of claims 2 to 5, characterized in that In the setting process E7, when the final toe actual value (38) deviates from the toe setpoint value by more than a predetermined limit deviation, the setting process steps E3 to E6 are executed again. In this case, the adjustment process step E7 is repeated so frequently that - until a predetermined number of repetitions is reached, or - until the final toe-in actual value (38) deviates from the toe-in setpoint value by a maximum predetermined limit deviation, Based on whichever condition comes first.

7. The method according to any one of the preceding claims, characterized in that The adjustment of the toe includes the adjustment of the wheel camber of the axle (2), so that the method is used to adjust the series-specific wheel camber adjustment of the axle (2).

8. The method according to any one of the preceding claims, characterized in that The adjustment of the toe includes the adjustment of the track of the axle (2), so that the method is used to adjust the series-specific track adjustment of the axle (2).

9. The method according to claims 7 and 8, characterized in that The adjustment of the track width and the adjustment of the wheel camber of the axle (2) to be adjusted are carried out in a common adjustment process (E).

10. The method according to claim 9, characterized in that In adjustment process step E4 , first the wheel camber is adjusted and then the track width is adjusted.

11. The method according to any one of the preceding claims, characterized in that In an axle series, a training process (A) is carried out on a first axle (2) to be adjusted in the axle series, and the training process is omitted for a second axle (2) to be subsequently adjusted in the same axle series, wherein a first supplementary angle of the first axle (2) is used for adjusting the toe setting of the second axle (2).

12. The method according to any one of the preceding claims, characterized in that Repeat the training process (A) on the third axle (2) in the axle series to be adjusted.

13. A toe adjustment system (1) for standardizing the toe adjustment of axles (2) of an axle series, wherein: The toe setting system (1) is configured to carry out a method according to one of the preceding claims.

14. A computer program comprising instructions causing a toe setting system according to claim 13 to execute the steps (A1-A4, E1-E7) of the method according to one of claims 1 to 12.

15. A computer-readable storage medium on which a computer program according to claim 14 is stored.

Images