EP1208948A2 - Device for pressing in or pulling off bearings or bushings - Google Patents

Abstract

The threaded spindle (5) passes through a smooth bore in the center of the centering housing (18). The nut (13) engages the thread on the spindle, and fits into the first end of the centering housing and a pressure ring fits over a shoulder on the second end. The ring presses against the ball bearing and forces it into the bearing housing (3).

Description

• einer mit einer Gewindemutter zusammenwirkenden Gewindespindel, die an ihrem der Gewindemutter abgewandten Ende mit einer zu der Gewindemutter hin weisenden Anschlagschulter versehen ist,
• einem mit einer Durchgangsbohrung zur Hindurchführung der Gewindespindel versehenen, zylindrischen Stützelement, gegen dessen Außenseite sich die Gewindespindel mit ihrer Anschlagschulter mittelbar oder unmittelbar axial abstützt,
• einer mittels der Gewindemutter axial zu der Gewindespindel verschiebbaren Druckscheibe, an der eine axiale Druckfläche angeformt ist und
• einem von der Druckfläche umgebenen Zentrieransatz, dessen Umfangsdurchmesser in etwa dem Innendurchmesser des zu ziehenden bzw. einzupressenden Bauteils entspricht.

The invention relates to a device for pulling and / or pressing in bearings or sleeves, in particular roller bearings or wheel flange hubs of motor vehicles

• a threaded spindle cooperating with a threaded nut, which is provided at its end facing away from the threaded nut with a stop shoulder pointing towards the threaded nut,
• a cylindrical support element provided with a through hole for the passage of the threaded spindle, against the outside of which the threaded spindle is supported indirectly or directly axially with its stop shoulder,
• a thrust washer which can be displaced axially to the threaded spindle by means of the threaded nut and on which an axial thrust surface is formed and
• a centering approach surrounded by the pressure surface, the circumferential diameter of which approximately corresponds to the inside diameter of the component to be drawn or pressed in.

With such extraction and retraction tools rolling bearings can be Motor vehicles and especially motor vehicles with MacPherson struts and press in. Furthermore, such tools are also used for pulling in Wheel flange hubs are suitable in these roller bearings. However, is a generic Wheel bearing changing tool not limited to these areas of application, but can always be used when parts are made of cylindrical Fits should be deducted or pressed into these fits.

A device for pressing and pulling with the aforementioned Features are known from DE 37 30 017 C1. Is part of the device a spacer tube open on both ends, referring to one of the two A separate front wall can be placed on the end faces. Through a central hole this end wall is one at one end with a driving hexagon provided threaded spindle inserted. Are from the other end Various thrust washers can be pushed onto the threaded spindle. For axial Moving the thrust washer is a threaded nut, which is on the External thread of the threaded spindle rotates and the thrust washer axially shifts. In addition to an axial pressure surface with which the pressure disc z. B. on the bearing to be assembled or disassembled is on the Thrust washer formed a cylindrical centering lug, the Diameter of the centering approach to the inner diameter of the to be drawn or roller bearing to be pressed.

A disadvantage of this device is that for different types of vehicles very large number of different pressure plates also available must become. This leads to high purchase costs for the device, furthermore there can easily be confusion of the thrust washers with the result that the tool does not fit for a particular application.

A greatly simplified tool for pressing in and pulling out bearings or Hubs are known from the utility model G 94 02 203. That in it Tool described consists of only a few items, namely in the Basic version made of a cylindrical spacer tube, the threaded spindle as well as the pressure disc covered with hard rubber on the pressure surface. A disadvantage of this tool is inadequate centering of the thrust washer the component to be pulled or pressed in.

The invention has for its object to make a device for removing and / or pressing bearings or sleeves more universally applicable.

To solve this problem , a device with the features mentioned at the outset is characterized by a centering sleeve surrounding the threaded spindle, on which a cylindrical seat for receiving the thrust washer and the centering shoulder are formed axially in succession. The axial pressure surface with which the axial pressure on z. B. the roller bearing to be pulled or pressed in is therefore located on a different part than the centering approach, the sole purpose of which is to center the pulling or pressing tool in the radial direction. This takes into account the fact that the inner diameters of the components to be drawn or pressed in on the one hand and the front diameters of these components on the other hand are often subject to different standard systems in practice. With the invention, it is possible to put together such a combination of parts by choosing a suitable centering sleeve with a centering projection formed thereon and, on the other hand, a suitable thrust washer that optimum force is introduced into the component to be drawn or pressed in. For this purpose, a cylindrical seat is first formed on the centering sleeve, which surrounds the threaded spindle, axially one after the other, which serves to accommodate the thrust washer, and a centering projection formed directly on the centering sleeve, which, when the tool is used, is inserted into the inner bore, for. B. the rolling bearing to be pulled engages with little radial play and this centers the tool.

According to one embodiment, it is proposed that the centering sleeve also on the one hand and the threaded nut on the other hand are separate components, and that the Centering sleeve with a smooth through hole on the thread of the Threaded spindle is guided. A division of tasks is hereby achieved in which the centering sleeve the seat of the thrust washer and the centering of the Tool is used, whereas the generation of the axial pressure by means of Threaded nut is made with an internal thread on the external thread the threaded spindle is seated.

The centering sleeve is preferably of identical design at both ends Provide shoulders for receiving one end of the nut. To this In this way, the centering sleeve can be used by both her and her push the other side onto the threaded spindle. In this case, the Both ends of the centering sleeve can be designed differently, so either Centering approaches to form different diameters, or different to provide large cylindrical seats to accommodate thrust washers. in the Everybody therefore offers the sense of universal applicability of the tool Centering sleeve two different dimensions. Despite this variability, make the centering sleeve compact, if according to a further embodiment the paragraphs which are used to hold the respective end of the threaded nut are provided, are arranged within the centering lugs.

In a further embodiment it is proposed that the centering sleeve with a radially expanded support collar is provided, on which the thrust washer axially supported. This support collar allows a uniform over the circumference and tilt-free transmission of the axial pressure from the centering sleeve to the Pressure washer. Around the centering sleeve on both sides and therefore for different ones The support collar can be used on both sizes End faces with support surfaces for optional axial support of one Pressure plate be provided, with each of the two support surfaces the seat for receiving the thrust washer and the Centering attachment connects.

Another embodiment of the device according to the invention is characterized by a securing element for at least provisional Securing the position of the thrust washer on the seat Practical use of the device for. B. an accidental in a car workshop To avoid loosening the parts from each other, which is the handling of the Device according to the invention under the often harsh conditions in one Workshop made considerably easier. Is particularly suitable as a securing element an elastically deformable and in a circumferential groove of the centering sleeve arranged ring.

Fig. 1

eine Schnittdarstellung des Werkzeugs bei dessen Anwendung zum Einpressen eines Wälzlagers;

Fig. 2

eine vergrößerte Darstellung des Details II in Fig. 1;

Fig. 3

eine Schnittdarstellung des Werkzeugs bei dessen Anwendung zum Ziehen eines Wälzlagers;

Fig. 4

eine Schnittdarstellung des Werkzeugs bei dessen Anwendung zum Einziehen einer Radflanschnabe;

Fig. 5

eine vergrößerte Darstellung der Einzelheit V in Fig. 4;

Fig. 6

das Werkzeug bei dessen Anwendung zum Einziehen der Radflanschnabe, wobei Fig. 6 ein späteres Anwendungsstadium als Fig. 4 zeigt;

Fig.7

in einer Explosionsdarstellung Einzelheiten des Werkzeugs, eines Wälzlagers sowie einer Wälzlageraufnahme und

Fig. 8

in einem Teilschnitt ein gegenüber den Darstellungen gemäß den Fign. 1 und 3 modifiziertes Werkzeug.

An embodiment of a device according to the invention for removing and / or pressing in bearings or sleeves and in particular roller bearings or wheel flange hubs of motor vehicles is described below with reference to the drawings. In it show:

Fig. 1

a sectional view of the tool in its application for pressing in a rolling bearing;

Fig. 2

an enlarged view of detail II in Fig. 1;

Fig. 3

a sectional view of the tool when used to pull a rolling bearing;

Fig. 4

a sectional view of the tool when it is used to retract a wheel flange hub;

Fig. 5

an enlarged view of the detail V in Fig. 4;

Fig. 6

the tool when it is used to retract the wheel flange hub, FIG. 6 showing a later application stage than FIG. 4;

Figure 7

in an exploded view details of the tool, a rolling bearing and a rolling bearing receptacle and

Fig. 8

in a partial section compared to the representations according to FIGS. 1 and 3 modified tool.

Both the tool according to the invention are shown in the drawings different application examples, as well as the ones to be drawn or components to be pressed. For the component to be drawn or pressed in Figures 1 to 3 are roller bearings 1, and Figures 4 to 6 around a wheel flange hub 2. The roller bearing 1 is composed of an outer ring 1a, two inner rings 1b and the rolling elements 1c together. The rolling bearing 1 sits in a bearing housing 3, which is part of the wheel suspension Motor vehicle is. The installed rolling bearing 1 is via circlips 4a, 4b axially secured within the bearing housing 3.

The tool according to the invention has a basic component continuous threaded spindle 5, at one end with a flats provided hexagon 6 is integrally formed. Below the hexagon 6 is also integrally formed a stop shoulder 7, which at Embodiment supported on the outer ring of a thrust bearing 8. The inner ring of the Axial bearing 8 in turn is supported on the outside 9a of an end wall 9 which Is part of a bell-shaped support element 10. The Support element 10 consists of a provided with openings 11 cylindrical part 12, as well as the end wall 9 formed thereon, whereby overall the shape of a bell results, with its open face can support the bearing housing 3.

At her other, d. H. the hexagon 6 with the stop shoulder 7 opposite end, is a threaded nut 13 on the threaded spindle 5 screwed. For this purpose, an internal thread 14 of the threaded nut 13 engages in the External thread 15 of the threaded spindle 5. The threaded nut 13 is with a preferably integrally formed thereon hexagon 16. To this It is possible by a relative actuation of the two hexagons 6, 16 to move the threaded nut 13 axially along the threaded spindle 5 and on this way to pull or press the rolling bearing 1 or Apply the required axial pressure to the wheel flange hub 2. Preferably done this by actively turning the hexagon 6 at the end of the spindle, whereas the Hexagon 16 of the threaded nut 13 is only secured against twisting. Figures 1 and 3 show that the internal thread 14 of the Threaded nut 13 extends only over part of the total length, wherein this threaded section with respect to the center of the total length of the Threaded nut 13 is arranged asymmetrically. In the application according to FIG. 1 is the threaded nut 13 so placed on the threaded spindle 5 that the bearing internal thread 14 is located on the outside, whereas the threaded nut the application of FIG. 3 is placed on the threaded spindle that the load-bearing internal thread 14 is located inside. This design of the threaded nut 13 and the internal thread 14 located therein leads to the lowest possible Length of the threaded spindle 5 and thus to a comparatively compact Construction of the tool.

Otherwise, both ends 17a, 17b of the threaded nut 13 are of the same design, i.e. H. they have the same diameter d. Part of the tool is also a centering sleeve 18 coaxially surrounding the threaded spindle 5 smooth surface through bore 19 on the external thread 15 of the Threaded spindle 5 guided centered without engaging with the external thread stand. At both ends, the centering sleeve 18 has centering projections 20a, 20b on. Inward of the centering lugs 20a, 20b is on the centering sleeve 18, respectively a cylindrical seat 21a, 21b is formed for receiving a thrust washer 22. Finally, the centering sleeve 18 is in the center with a radially expanded support collar 23 Mistake. In this way, the seat 21a is located between the support collar 23 and the outer centering projection 20a, and the seat 21b is located between the support collar 23 and the centering shoulder, which is also external 20b.

The centering projection 20a preferably has one at one end of the centering sleeve different outer diameter than the centering projection 20b at the other end of the Centering. In this way, one and the same centering sleeve can be used whether this from their one side or from their other side on the Threaded spindle is placed for centering in the inner rings 1b of two use bearings of different sizes. The outer is supported here Shell surface of the centering lugs 20a and 20b on the respective inner bore of the inner ring 1b of the respective rolling bearing 1 from almost without play, which the Tool relating to the rolling bearing to be pulled or pressed in 1 is clearly centered. Due to the small radial play between the Bearing inner diameter and the outer diameter of the centering projection 20a or 20b of the centering sleeve is an optimal alignment of the tool in Given with regard to the rolling bearing to be pulled or pressed.

For secure engagement of the threaded nut 13 in one or the other end of the Centering sleeve 18 is the centering sleeve with the same design at both ends Paragraphs 24 provided. In these paragraphs 24 each of the two ends 17a, 17b of the threaded nut come to rest flush. Both paragraphs 24 are located itself within the respective centering lugs 20a, 20b, resulting in a compact Design of the centering sleeve 18 leads.

The one that can be pushed onto one seat 21a or the other seat 21b Thrust washer 22 represents that element which on the or to be pulled component to be pressed directly exerts the corresponding axial pressure. For this the thrust washer 22 is supported axially on the respectively assigned end face of the radially expanded support collar 23.

2 best shows the details of the thrust washer 22 and its Recognize connection with the centering sleeve 18 serving as a carrier. The Support collar 23 is on both ends with support surfaces 25 for optional axial Support the thrust washer 22 provided. 2 is that shown therein Thrust washer 22 with a step-shaped in relation to the axial pressure surface 26 recessed recess 27 provided. This way when pulling or pressing in the rolling bearing 1 while maintaining the axial distance y a pressure of the thrust washer 22 only on the outer ring 1a of the rolling bearing 1 exercised what the disassembly or assembly of the rolling bearing 1 considerably facilitated.

In the case of the figures 4 and 5 applications is due to the Recess 27, a distance x ensured that when installing the wheel hub 2nd the sole axial support on the inner ring 1b of the bearing enables.

In practical use is part of the invention Tool not only a single centering sleeve 18 and a single one Thrust washer 22. Rather, the user in the automotive workshop various centering sleeves 18 and various pressure plates 22 for Depending on the vehicle make, the centering sleeve / thrust washer combination is available with the correct outside diameter of the centering shoulder and the correctly designed pressure surface and the correct diameter of the pressure plate 22 to put together. Here we see the number of available Centering sleeves 18 reduced to half, since each centering sleeve 18 has two ends different centering approaches 20a, 20b. In this context is advantageous if the diameter of the seat 21a, 21b for everyone to choose from standing centering sleeves 18 is uniform. This allows the Thrust washers 22 with uniform and thus universal inner diameters finished.

In order to at least temporarily secure this inner diameter of the To ensure pressure disc 22 on the centering sleeves 18 is located in each seat 21a, 21b has a circumferential groove with an elastic therein deformable ring 28, when the thrust washer 22 is pushed on, this ring becomes 28 deformed so that a frictional engagement between centering sleeve 18 and thrust washer 22 arises, which prevents accidental falling of the pressure plate 22. Only against a certain resistance can the thrust washer 22 again Pull off the respective side of the centering sleeve 18.

Figures 4 and 6 show the retraction of the in two process stages Edge flange hub 2 in the already mounted rolling bearing 1. Two are thereby Additional discs 29, 30 for use. The additional disc 29 is supported on the one hand on the stop shoulder 7 or the axial bearing 8, and on the other hand on an outer end face of the wheel flange hub 2 Additional disk 29 is an equivalent to the bell-shaped support element 10 according to Figures 1 and 3. The additional disc 30 comes only in the second Process stage according to FIG. 6 for use. The additional disk 30 is supported here on the one hand on the inner ring 1b of the rolling bearing 1, and on the other hand on the Front of the centering sleeve 18.

8 shows a modified embodiment of the tool, wherein changes to the area of the stop shoulder 7 of the threaded spindle 5 limit. In this case, there is a spherical cap under the axial bearing 8 designed disc 31, which in a corresponding pan 32 on the outside 9a of the bell-shaped support element 10 is seated. Besides, that is Through hole 33 of the support member 10 for passing the if necessary also angled threaded spindle 5 enlarged. The tool 8 allows some compensation for angular deviations between support element 10 and threaded spindle 5. Cause of such Angular deviation can result in uneven machining of the outer end face of the bearing housing 3.

LIST OF REFERENCE NUMBERS

1

roller bearing

1a

outer ring

1b

inner ring

1c

rolling elements

2

wheel flange hub

3

bearing housing

4a

circlip

4b

circlip

5

screw

6

hexagon

7

stop shoulder

8th

thrust

9

bulkhead

9a

outside

10

support element

11

breakthrough

12

cylindrical part

13

threaded nut

14

inner thread

15

external thread

16

hexagon

17a

End of the threaded nut

17b

End of the threaded nut

18

centering

19

Through Hole

20a

Spigot

20b

Spigot

21a

Seat

21b

Seat

22

thrust washer

23

supporting collar

24

paragraph

25

support surface

26

axial pressure surface

27

recess

28

ring

29

additional disk

30

additional disk

31

disc

32

pan

33

Through Hole

d

diameter

x

axial distance

y

axial distance

Claims (12)

Device for removing and / or pressing in bearings or sleeves, in particular roller bearings or wheel flange hubs of motor vehicles, with a threaded spindle (5) cooperating with a threaded nut (13), which is provided at its end facing away from the threaded nut (13) with a stop shoulder (7) pointing towards the threaded nut, a cylindrical support element (10) provided with a through hole (33) for the passage of the threaded spindle (5), against the outside (9a) of which the threaded spindle (5) is indirectly or directly axially supported with its stop shoulder (7), one by means of the threaded nut (13) axially displaceable to the threaded spindle (5) thrust washer (22) on which an axial pressure surface (26) is formed and a centering projection (20a, 20b) surrounded by the pressure surface (26), the circumferential diameter of which approximately corresponds to the inside diameter of the component to be drawn or pressed in, marked by
a centering sleeve (18) surrounding the threaded spindle (5), on which a cylindrical seat (21a, 21b) for receiving the thrust washer (22) and the centering projection (20a, 20b) are integrally formed. Device according to claim 1, characterized in that the centering sleeve (18) and the threaded nut (13) are separate components, and in that the centering sleeve (18) is guided on the thread (15) of the threaded spindle (5) with a smooth through bore (19). Device according to claim 2, characterized in that the centering sleeve (18) is provided at both ends with identically shaped shoulders (24) for receiving one end (17a or 17b) of the threaded nut (13). Device according to claim 3, characterized in that the shoulders (24) are arranged within the centering shoulders (20a, 20b). Device according to one of claims 1 to 4, characterized in that the centering sleeve (18) is provided with a radially expanded support collar (23) on which the pressure disc (22) is axially supported. Apparatus according to claim 5, characterized in that the support collar (23) is provided on both end faces with support surfaces (25) for optionally axially supporting a thrust washer (22), and in that the seat (25) is arranged in succession on each of the two support surfaces (25). 21a or 21b) for receiving the thrust washer and the centering extension (20a or 20b). Device according to one of claims 1 to 6, characterized by a securing element (28) for at least temporarily securing the position of the thrust washer (22) on the seat (21a or 21b). Device according to claim 7, characterized by an elastically deformable ring arranged in a circumferential groove of the centering sleeve (18) as a securing element (28). Device according to one of claims 2 to 8, characterized in that both ends (17a, 17b) of the threaded nut (13) are of identical design, and that the threaded nut is provided with a threaded section (internal thread 14) only over part of its total length, wherein the threaded section is arranged asymmetrically with respect to the center of the total length. Device according to one of claims 1 to 9, characterized in that the thrust washer (22) is provided with a recess (27) which recesses in steps in relation to the axial thrust surface (26). Device according to one of claims 1 to 10, characterized in that the support element (10) has the shape of a bell provided with a perforated end wall (9) and that the stop shoulder (7) of the threaded spindle (5) is opposite the outside (9a ) the end wall (9) supports. Device according to one of claims 1 to 11, characterized in that in order to compensate for angular deviations between the support element (10) and the threaded spindle (5), the stop shoulder is dome-shaped and in a corresponding pan (32) on the outside (9a) of the support element (10 ) sits.

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