WO2009095209A1

WO2009095209A1 - Assembly tool

Info

Publication number: WO2009095209A1
Application number: PCT/EP2009/000522
Authority: WO
Inventors: Michael Vollmuth
Original assignee: Robert Bosch Gmbh
Priority date: 2008-01-31
Filing date: 2009-01-28
Publication date: 2009-08-06
Also published as: DE102008007146B4; DE102008007146A1

Abstract

The invention relates to an assembly tool for assembling wheels, comprising a plurality of first drive units (2) which transmit torque to first driven shafts (4) that are assigned to said drive units (2), respective first tool heads (8) being located on the driven shafts (4) and the latter (4) extending substantially parallel to one another in a first predefined direction (R1). According to the invention, the device has a plurality of second driven shafts (14) that are driven by drive units (2) assigned to said shafts and that extend substantially parallel to one another in a second direction (R2) that deviates from the first predefined direction.

Description

assembly tool

description

The present invention relates to an assembly tool, and more particularly to an assembly tool for wheel assembly in the automotive industry.

In the automotive industry assembly tools are known which allow the mounting of wheels or rims to vehicles. These assembly tools in this case have a plurality of drives, which at the same time preferably tighten several nuts on corresponding output shafts at the same time in order to mount the wheels on the vehicle in this way. However, the problem arises that different vehicles or different rims also have different pitch circle diameter of the individual screws or nuts. Various devices are known from the prior art, which allow a conversion to different pitch circle diameter of the individual wheel bolts.

However, in practice, a variety of different rim systems, in some cases also rim systems, which have different numbers of nuts, for example, four or five nuts.

If different models are mounted with different pitch circle radii of the screws, the wheel screwdriver is designed with an automatic or manual pitch adjustment. However, if the different fasteners and different sizes z. As wrench sizes or shapes or different systems z. B. screws or nuts, a time-consuming tool change is required or another screw system is kept, which in turn causes costs and also requires additional space. The previously known solutions can not provide the number of desired pitch circles due to their structural design and especially not if in addition still different tools z. B. key widths are needed.

The present invention is therefore based on the object to provide an assembly tool which allows a higher variability and at the same time is cost-efficient. This is achieved according to the invention by the subject matter of claim 1.

Advantageous embodiments and further developments are the subject of the dependent claims.

An inventive assembly tool for mounting wheels has a plurality of first drive means, which transmit torques on these drive means associated output shafts, wherein on these output shafts each first screw body can be arranged or fastened and the output shafts extend side by side in a first predetermined direction.

According to the invention, the device has a multiplicity of second output shafts, which are driven by the associated drive devices and which extend next to one another in a second direction deviating from the first predetermined direction. Thus, the invention proposes to provide a tool which has in each case a set of driven output shafts in two different directions. In this way, a higher variability of the tool according to the invention can be achieved.

By waves extending side by side is meant that the waves protrude from the same side surface of the device here. Preferably, the first output shafts and, more preferably, also the second output shafts extend substantially parallel to one another, whereby it is understood to mean essentially parallel that the individual shafts in each case enclose angles which are smaller than 10 °. •

However, it would also be possible that individual waves each extend obliquely to each other, for example, the distance of the individual waves starting from the device steadily increasing or decreasing to the wheel to be mounted. In this case, joints such as cardan joints are preferably used for transmitting the torques.

Furthermore, it is possible by the invention to adjust with only a Radschraubsystem a higher number of different pitch circles and screwing and cost and save space to work. Also a faster conversion between the systems is possible. ^'

Preferably, the first predetermined direction and the second predetermined direction are opposite to each other. This means that a first set of output shafts protrudes in one direction and a second set of output shafts in a direction opposite thereto.

However, it would also be conceivable that the first predetermined direction and the second predetermined direction are not opposite to each other, but extend at an angle different from 180 ° to each other. This could be achieved for example by the use of angle gears. In order to keep the transmission simple and therefore cost-effective, however, the two directions are advantageously opposite to each other. It would also be conceivable to provide, in addition to the two sets of output shafts, further sets of output shafts, which may extend both in one of the two (mutually opposite) directions and in other directions.

In a further advantageous embodiment, at least one drive device drives a first output shaft and a second output shaft. Preferably, a set of drive devices is provided which respectively drive first output shafts and second output shafts associated therewith. This only one drive per screw is used here, so the cost can be reduced. It is thus required for two different requirements, namely pitch requirements and tool requirements, only one drive. In this way, a particularly space-saving solution for wheel mounting is provided. Preferably, the individual drive means are independently controllable.

In a further preferred embodiment, an output or an output shaft is assigned to the drive device or to the drive device assigned to this drive device. th output shaft offset. This means that an offset output is used so that the output shaft or the screw spindle has a second output not only in one direction but also in a direction opposite thereto.

In a further preferred embodiment, second screw bodies are arranged on the second output shafts, the second screw bodies differing from the first screw bodies. By this construction with different screw bodies a higher variability of the device according to the invention is achieved.

Each drive device preferably drives both a first output shaft and a second output shaft. In a further advantageous embodiment, a transmission device is provided which causes the first output shafts and the second output shafts to be driven in the same direction of rotation. In this way, the handling of the device can be facilitated.

In a further advantageous embodiment, the distances between at least two output shafts are variable. Preferably, the distances of all first output shafts are mutually variable. In this way, the device, as mentioned above, can be set to different pitch circle radii. In this case, an adjusting device is particularly preferably provided which uniformly changes the distances of all the output shafts from one another in order to achieve larger or smaller pitch circle diameters in this way.

In a further advantageous embodiment, at least one second output shaft is connected to the drive device via a torque transmission shaft. For example, it is possible for the drive device to act directly on a first output shaft and for the second output shaft via the said torque transmission shaft.

In a further advantageous embodiment, this torque transmission shaft is a propeller shaft or has a universal joint. Through the use of a cardan shaft or through the use of universal joints, it is possible to set different partial circle radii on the two sides of the devices, ie to allow the first output devices to have a different pitch circle radius than the second output shafts. It would also be possible to offset the individual torque transmission shafts in relation to the first output shafts in parallel, which is possible by a corresponding configuration of the transmission between the torque transmission shaft and the drive. In this way, the setting of different ranges of pitch radii for the two sets of output shafts can be simplified.

In a further advantageous embodiment, the assembly tool has an adjusting drive in order to adjust the distances of the first output shafts from one another. This uniform adjustment of the distance between the output shafts and the different pitch circle radii is thus achieved by this adjustment drive. Preferably, the device also has a second adjusting drive, which adjusts the distances of the second output shafts to each other. Preferably, these two adjustment drives are independently controllable, so that essentially any different pitch circle radii can be adjusted. It is possible that the first output shafts can be adjusted in a first predetermined range of part circle radii and the second output shafts in a second range of different pitch radii, these areas may be partially different or even completely different could be.

In a further advantageous embodiment, at least one output shaft, preferably in its longitudinal direction, displaceable. In this way it is possible to allow a change between, for example, rim systems with four locking screws and rim systems with five locking screws. Furthermore, it is also possible that the said output shaft is displaceable in an oblique direction with respect to the other output shafts.

In a further advantageous embodiment, at least one output shaft is tiltable. In this case, preferably this output shaft is tilted to be subsequently withdrawn.

In a further advantageous embodiment, said output shaft is displaceable on a guide. However, it would also be possible that several output shafts, as mentioned above, are displaceable in the longitudinal direction or tiltable. Preferably, the tool is arranged on a holder and rotatable about a predetermined axis of rotation. As a result of this rotation about the said axis of rotation, an assembly by the first output shafts can be quickly replaced by an assembly by the second output shafts. In particular, it is possible to exchange different screw bodies in a rapid manner, ie replacement is possible without the screw bodies being removed from the output shafts.

In a further advantageous embodiment, the first output shafts are rotatable about a common pivot point. It is possible to store these first output shafts on a roller, which in turn is rotatable relative to a housing of the tool.

The present invention is further directed to a drive, in particular for a tool of the type described above. This drive has a drive device which transmits a torque to a first output shaft assigned to this drive device. Furthermore, a second driven by this drive device output shaft is provided. According to the invention, the first output shaft and the second output shaft extend in different and in particular in opposite directions and between the drive device and the second output shaft is provided a Drehmomentübertra- transmission shaft which transmits a torque of the drive means to the second output shaft.

Preferably, the second output shaft relative to the first output shaft is displaceable in a direction which is perpendicular to the direction in which the first output shaft extends.

Further advantages and embodiments will be apparent from the attached drawings:

Show:

Fig. 1 is a schematic representation of an assembly tool according to the invention; and

Fig. 2 shows a drive device with two output shafts. FIG. 1 shows a schematic representation of an assembly tool 1 according to the invention. Only two first output shafts 4 and two second output shafts 14 are shown for the sake of simplicity, however, it is pointed out that in practice several output shafts, for example four or five or more output shafts, can be present or . available. The device has a housing 6 within which a plurality of drive devices 2 are provided (only two drive devices are shown here). The drive devices are preferably electric motors. (Alternatives would be hydraulic or pneumatic drive means).

The two drive devices 2 drive the two output shafts 4 assigned to them via a transmission device 12. At these output shafts 4 each screw heads 8 are arranged, which in turn can be placed on the screws of a rim.

The two output shafts 4 and screw spindles are arranged on a base plate 22, which allows an adjustment of the distance between the two output shafts 4 and thus a change to different pitch circle radii by means of an adjusting device 21. For this purpose, an adjusting drive 20 is used. Thus, the first output shaft 4 can be mounted with a plurality of first output shafts on this base plate 22, which in turn allows an electrically or pneumatically adjustable pitch circle diameter. The reference numeral 20 refers, as I said to a corresponding electric adjustment, which serves to change the pitch circle radii. When adjusting the pitch radii, the drive devices are preferably displaced together with the drive shaft 4 relative to the base plate 22. This means that the entire unit of drive device 2, gear 12 and output shafts 4 is moved relative to the base plate 22 to change the pitch radii.

The reference numeral 16 refers to two torque transmission shafts which transmit the torque from the transmission device 12 to the second output shafts 14 on the opposite side. It can be seen that the first output shafts 4 extend in a direction R1 and the second output shafts 14 in a direction R2 opposite thereto. Also, it can be seen that the second output shafts 14 are arranged closer to each other here than the first output shafts 4. Thus, here is on the right Page set a smaller pitch circle radius. Also on this page a corresponding base plate 22 is provided.

The torque transmission devices are preferably splined shafts with their associated universal joints 15, so that in each case a first output shaft 4 is displaceable relative to a second output shaft 14 in the direction A perpendicular to the directions R1 and R2. The reference numeral 18 refers to arranged on the second output shafts 14 screw heads for tightening adjusting screws on the rims.

By the spline shafts 16 and the cardan joints 15 associated with these splines 16, a length and axial compensation resulting from the change of the pitch circle diameter can be made. If a change in the number of output shafts 4 or 14 is necessary in addition to the adjustment of the pitch circle, one or more output shafts 4, 14 can be withdrawn into the housing 6. The compensation required for this purpose is also compensated with the aforementioned splined shaft 16.

The reference numeral 24 refers to a holder or a retaining clip, on which the entire device or the housing 6 is held. This holder 24 is rotatable by means of a hinge 25 with respect to a rotation axis D. In this way, for example, the device can be pivoted by 180 ° to quickly switch from the tool heads 8 on the tool heads 18. The housing is thus pivoted in the horizontal by 180 °.

Preferably, a sensor device (not shown) is provided, which detects a pivoting position of the holder 24 and thus of the housing. This sensor device outputs a signal with which the direction of rotation (and possibly also the torque) of the drive devices 2 can be changed. It can thus be achieved that even when the holder or the housing is pivoted, a torque in the same direction of rotation is always applied to the screws to be tightened or loosened and the operator does not himself have to change or monitor the direction of rotation of the drive devices. Instead of a sensor also switches (such as Polwender) could be used. FIG. 2 shows a schematic representation of a drive device 2. The upper part of the diagram shows a conventional drive device 2 with an output shaft 3 assigned to it. The output gear 3 is in turn fitted with the offset gear 12 (lower subpicture), which transmits the torque of the drive device 2 allows the first output shaft 8 and the output shaft 18 extending in the opposite direction. The reference numeral 16 again refers to the torque transmission device, which is also shown in Figure 1.

All features disclosed in the application documents are claimed as essential to the invention insofar as they are novel individually or in combination with respect to the prior art.

LIST OF REFERENCE NUMBERS

1 tool

2 drive device

3 output shaft

4 first output shafts

6 housing

8 screw heads

12 gear device

14 second output shafts

16 torque transmission shafts

18 screw heads

20 adjustment drive

21 adjusting device

22 base plate

24 bracket

25 swivel joint

A direction

D rotation axis

R1. R2 direction

Claims

Assembly tool patent claims

1. Tool for mounting wheels with a plurality of first drive means (2) which transmit a torque on these first drive means (2) associated first output shafts (4), wherein on these output shafts each first screw body (8) can be arranged and the first output shafts (4) extend side by side in a first predetermined direction (R1), characterized in that the tool (1) has a plurality of second output shafts (14) which are driven by drive means associated with these second drive shafts (4) and which side by side in a direction predetermined by the first

(R1) extending deviating second direction (R2).

2. Tool according to claim 1, characterized in that the first predetermined direction (R1) and the second predetermined direction (R2) are opposite to each other.

3. Tool according to at least one of the preceding claims, characterized in that at least one drive device (2) has a first output shaft (4) and a second

Output shaft (14) drives.

4. Tool according to at least one of the preceding claims, characterized in that on the second output shafts (14) second screw body (18) are arranged, wherein the second screw body (18) from the first screw bodies (8) differ.

5. Tool according to at least one of the preceding claims, characterized in that each drive device (2) drives both a first output shaft (4) and a second output shaft (14).

6. A tool according to at least one of the preceding claims, characterized in that a transmission device (12) is provided, which causes the first output shafts (4) and the second output shafts (14) to be driven in the same direction of rotation.

7. Tool according to at least one of the preceding claims, characterized in that the distances between at least two output shafts (4,14) are variable.

8. A tool according to at least one of the preceding claims, characterized in that at least one second output shaft (14) by means of a torque transmission shaft (16) with the drive means (2) is in communication.

9. Tool according to claim 8, characterized in that the torque transmission shaft (16) is a propeller shaft (16).

10. Tool according to at least one of the preceding claims, characterized in that the tool (1) has an adjusting drive (20) to the distances of the first

To adjust output shafts (4) to each other.

11. Tool according to at least one of the preceding claims, characterized in that at least one output shaft (4, 14) is displaceable in its longitudinal direction.

12. Tool according to at least one of the preceding claims, characterized in that at least one output shaft (4,14) is tiltable.

13. Tool according to at least one of the preceding claims, characterized in that the tool (1) on a holder (24) is arranged and this holder (24) about a predetermined axis of rotation (D) is rotatable.

14. Tool according to at least one of the preceding claims, characterized in that the first output shafts (4) are rotatable about a common pivot point.

15. Drive, in particular for a tool according to at least one of the preceding claims with a drive device (2) which transmits a torque to one of these drive means (2) associated first output shaft (4), and a second of said drive means (2) driven output shaft (14) characterized in that the first output shaft (4) and the second output shaft (14) extend in different directions and between the drive means (2) and the second output shaft (14) a torque transmission shaft (16) is provided, which is a torque the drive device (2) transmits to the second output shaft (14).