EP2045043B1 - Wheel hub removal device - Google Patents

Abstract

The device (1) has a flange adapter (11) fixed at a wheel hub flange (4) and protruding to a peripheral side opposite to the flange. The flange adapter has a recess (28) provided for stud bolts (10), which are coupled with the flange adapter. A roller bearing (7) is provided in a knuckle (3) and comprises a flange plate (9), which is supported at the flange over the stud bolts. A protective ring is integrated between the knuckle and a wheel hub (2). A pressure pin is guided at the flange by a threaded hole. A pressing unit is integrated between the flange plate and a pressure plate.

Description

The invention relates to a wheel hub removal device for removing a wheel hub from a bearing located in a steering knuckle according to the features in the preamble of claim 1.

A Radnabendemontagevorrichtung of the generic type is from the DE 20 2004 010 887 U1 known. Here, two or three stud bolts are screwed into threaded holes in the hub flange. At the stud bolts a flange plate is determined. The flange plate serves to hold a press unit. Furthermore, a pressure plate is provided, which is supported by pressure bolts on a support ring which is incorporated between the stub axle and the wheel hub. The pressure pins are inserted through the threaded holes, which are not occupied by the studs. At a Wheel hub with a five-hole flange and a use of three studs can therefore be used two pressure pin.

The known device has proven very well in practice. However, there are vehicles or vehicle types in which the extraction of the wheel hub with mounted joint or drive shaft due to the space-constrained conditions is difficult, because you can not get to the threaded holes in the Radflanschnabe to set the studs hereon. Also for dismantling sometimes so high extraction forces are required that the known disassembly device, because there can be used only two or three pressure pin, reaches its limits.

The invention is based on the prior art based on the object to improve a Radnabeterontagevorrichtung application technology, especially in terms of power transmission, and designed so that even such hubs can be removed in which a determination of the stud directly on the hub flange is not possible.

The solution to this problem consists according to the invention in a Radnabendemontagevorrichtung according to the features of claim 1.

Thereafter, a flange adapter is provided, which is fixable on the wheel hub flange and projects circumferentially relative to the wheel hub flange, wherein in the flange adapter receptacles are provided for the stud bolts, via which the stud bolts are coupled to the flange adapter.

The flange adapter according to the invention creates opposite the wheel hub flange further outward recordings or connection options for fixing the studs. These can now be fixed to the flange adapter, which is connected to the hub flange. The rear flange plate is fixed to the stud bolt. Subsequently, the remaining device components are mounted.

A further advantage is that it no longer has to resort directly to the threaded bores in the wheel hub flange for fixing the stud bolts.

Accordingly, more stud bolts can be mounted than before. The threaded holes in the hub flange are all available for the pressure bolts, so that more pressure bolts can be used. About the pressure pin, the pressure plate is supported on the arranged between the hub and the steering knuckle support ring. Consequently, in the Radnabendemontagevorrichtung invention considerably higher forces to extend the wheel hub can be transmitted.

Advantageous embodiments and further developments of the basic concept of the invention are the subject of the dependent claims 2 to 12.

In practice, it makes sense to form the recordings in the flange adapter as threaded holes into which the studs can be screwed in each case with a threaded end. This training is manufacturing and application technology advantageous.

After the flange adapter is fixed to the hub flange, the stud bolts are mounted and fixed at the free end of the flange plate. Between the studs, the pressure plate is positioned, which is supported on the support ring via the pressure bolts, which are inserted through the threaded holes in the hub flange. Between flange plate and pressure plate, the press unit is incorporated. Upon actuation of the pressing unit, the axial force generated thereby is transmitted via the pressure pin and the support plate on the steering knuckle and pulled out of the wheel hub from the bearing in the steering knuckle.

Appropriately, the flange adapter is annular and composed of two mutually coupled ring segments. This allows a simple and secure installation of the flange adapter even in confined spaces.

In the flange adapter an annular groove is formed. The flange adapter engages around the outer circumference of the wheel hub flange with the annular groove. In this case, the groove base rests against the outer surface of the wheel hub flange and the two side legs of the annular groove or the flange adapter engage around the wheel hub flange. This is a particularly stable fixing and mounting of the flange adapter on Radnabenflansch possible, which allows the transmission of high forces when pulling the wheel hub.

The ring segments of the flange adapter are connected by bolts extending in their plane. The stability of the connection between the ring segments can be further increased if positive-locking elements are provided on the contacting abutment surfaces of the ring segments, which engage with each other. In this way, also a fit connection can be made. Conveniently, the interlocking elements are formed by pins and pin holes. When coupling the ring segments, the pins of one ring segment are inserted into the pin holes of the other ring segment. Furthermore, the bolts are passed through the pins and set in threaded holes, the threaded holes form the continuation of the pin holes.

As a pressing unit, different force generators, for example mechanical or hydraulic threaded spindles, can be used. As is particularly advantageous for practice, a press unit is considered, which comprises a hydraulic cylinder and a threaded spindle. The threaded spindle passes through with its base body a hole in the flange plate and is fixed to this. By combining a hydraulic cylinder and a threaded spindle, the available stroke or Ausziehweg the press unit can be increased.

The support ring, which is installed between the stub axle and the wheel hub, is preferably also formed by two mutually coupled ring segments, which are connectable by means of bolts. Here, too, interlocking interlocking elements are provided on the contacting abutment surfaces of the ring segments. These also consist of pins and mortises, the bolts pass through the pins.

In the support ring two remote via a step annular surfaces are provided. The annular surfaces have different diameters and are configured so that the support ring engages around the front end of the wheel hub. This is the inner ring surface on the front side of the steering knuckle. In this way, a stable fixing and support of the support ring is ensured on the steering knuckle.

Figur 1

eine erfindungsgemäße Radnabendemontagevorrichtung in einer Expositionsdarstellung ihrer Bauteile nebst Achsschenkel und Radnabe;

Figur 2

in perspektivischer Darstellungsweise die Radnabendemontagevorrichtung im an einer Radnabe montierten Zustand vor dem Ausziehen der Radnabe, wobei das in der Bildebene vordere Ringsegment des Stützrings nicht dargestellt ist;

Figur 3

eine perspektivische Darstellung analog zu der von Figur 2, jedoch mit ausgezogener Radnabe;

Figur 4

in der Seitenansicht, teilweise in geschnittener Darstellungsweise, die erfindungsgemäße Vorrichtung vor dem Ausziehen der Radnabe und

Figur 5

in der Seitenansicht, teilweise in geschnittener Darstellungsweise, die erfindungsgemäße Vorrichtung nach dem Ausziehen der Radnabe.

The invention is described below with reference to an embodiment shown in the drawings. Show it:

FIG. 1

a Radnabendemontagevorrichtung invention in an exposure representation of its components together with the knuckle and wheel hub;

FIG. 2

in perspective representation, the Radnabeterontagevorrichtung in mounted on a hub state before pulling out the wheel hub, wherein the front in the image plane ring segment of the support ring is not shown;

FIG. 3

a perspective view analogous to that of FIG. 2 , but with extended wheel hub;

FIG. 4

in the side view, partially in a sectional representation, the device according to the invention before pulling out the wheel hub and

FIG. 5

in the side view, partially in a sectional representation, the device according to the invention after the removal of the wheel hub.

Based on FIGS. 1 to 6 a Radnabendemontagevorrichtung 1 according to the invention is described. The wheel hub 2 has a wheel hub flange 4 with threaded holes 5 and is seated with its hub neck 6 in a roller bearing 7, which is mounted in a bearing bore 8 of the steering knuckle 3.

The Radnabendemontagevorrichtung 1 comprises a flange 9, which is indirectly supported via studs 10 on the hub flange 4 with the inclusion of a flange adapter 11. For this purpose, the flange adapter 11 can be fixed to the wheel hub flange 4.

It can be seen that the flange adapter 11 is annular and can be assembled from two ring segments 12, 13 which can be coupled together. For this purpose, the ring segments 12, 13 are connected by extending in its plane E bolt 14 together. These are guided by lateral holes 15 in the ring segment 12. At the contacting abutment surfaces 16, 17 of the ring segments 12, 13 form-fitting elements 18 in the form of pins 19 on the ring segment 12 and pin holes 20 are formed on the ring segment 13 which engage with each other. As a result, a fitting connection between the ring segments 12, 13 is produced. The pins 19 are designed sleeve-shaped, so that the bolts 14 can be screwed through the holes 15 through the pins 19 and the pin holes 20 into threaded holes 21 in the ring segment 13 and the ring segments 12, 13 can be clamped together.

It can further be seen that the flange adapter 11 has a circumferential annular groove 22 and engages around the outer circumference 23 of the wheel hub flange 4 with the annular groove 22. In this case, the groove base 24 bears against the outer surface 25 of the wheel hub flange 4. The two side legs 26, 27 of the flange adapter 11 surround the wheel hub flange 4 and are laterally on this. In this way, a stable coupling of the flange adapter 11 is ensured with the hub flange 4, via which high tensile and compressive forces can be transmitted.

The flange adapter 11 projects circumferentially relative to the wheel hub flange 4. In flange adapter 11 receptacles 28 are provided in the form of threaded holes into which the stud bolts 10 are each screwed with a threaded end 29.

At the end remote from the wheel hub 4 end 30 of the stud 10, the flange plate 9 can be fixed. For this purpose, through holes 31 are provided in the flange plate 9, through which cylinder screws 32 can be passed and screwed into threaded bores 33 of the stud bolts 10 at the end.

The wheel hub removal device 1 further includes a pressure plate 34 which is positioned between the stud bolts 10. The pressure plate 34 is supported via pressure pin 35 on a support ring 36, which between the stub axle. 3 and the wheel hub 2 is incorporated. The pressure pins 35 are inserted through the threaded holes 5 in the hub flange 4 to rest on the support ring 36. At the wheel hub flange 4 facing away from the end 37 of the pressure pin 35, these engage in blind holes 38 of the pressure plate 34 a.

To facilitate the handling of the pressure pin 35, these have a grooved portion 39 provided with a profiling. The stud bolts 10 are provided at their end 30 with a profiled corrugated portion 40.

The support ring 36 is also composed of two mutually coupled ring segments 41, 42, which are braced by means of bolts 43 with each other. At the contacting abutment surfaces 44, 45 of the ring segments 41, 42 form-fitting elements 46 in the form of pins 47 and pin holes 48 are provided, which engage with each other. The bolts 43 pass through the pins 47 and the pin holes 48 and are screwed into threaded holes 49 in the ring segment 42.

The support ring 36 has two offset over a step 50 annular surfaces 51, 52. The support ring 36 thus surrounds the front end 53 of the hub neck 6, wherein the inner annular surface 51 abuts the end face of the steering knuckle 3. The annular surface 52 extends at a distance to a shoulder 54 of the hub neck 6.

Between the flange plate 9 and the pressure plate 34, a pressing unit 55 is incorporated. The pressing unit 55 comprises a hydraulic cylinder 56 and a threaded spindle 57. The threaded spindle 57 has a base body 59 provided with an external thread 58 and is screwed with this into a provided with an internal thread 60 bore 61 in the flange plate 9. At the free end 62 of the threaded spindle 57 an actuating polygon 63 is provided. At the hydraulic cylinder 56 facing the end 64 of the threaded spindle 57, a spigot 65 is provided. About the spigot 65, the hydraulic cylinder 56 can be pre-centered during assembly.

The Figures 2 and 4 show the Radnabeterontagevorrichtung 1 in the mounted state before pulling out the wheel hub 2 from the steering knuckle 3. By Actuation of the hydraulic cylinder 56 of the pressing unit 55 with pressure, the hydraulic cylinder 56 is extended. The force is transmitted to the pressure plate 34, which is supported on the steering knuckle 3 via the pressure bolts 35 and the support ring 36. The introduction of force leads to a displacement of the pressing unit 55 together with the flange plate 9 and the stud bolt 10 away from the steering knuckle 3, so that the wheel hub 2 is pulled out of the roller bearing 7 in the steering knuckle 3. This is in the Figures 3 and 5 clarified.

If the available stroke of the hydraulic cylinder 56 is insufficient for pulling out the wheel hub 2, the hydraulic cylinder 56 is depressurized and the threaded spindle 57 is actuated. As a result, the hydraulic cylinder 56 is pressed back into its starting position. Subsequently, the hydraulic cylinder 56 can be pressurized again and the available hub be used again until the hub 2 is completely pulled out of the steering knuckle 3 and can be dismantled.

Reference numerals:

1 -

Hub dismantling device

2 -

wheel hub

3 -

journal

4 -

wheel hub

5 -

threaded hole

6 -

hub socket

7 -

roller bearing

8th -

bearing bore

9 -

flange

10 -

studs

11 -

flange

12 -

Ring segment v. 11

13 -

Ring segment v. 11

14 -

bolts

15 -

drilling

16 -

Impact area v. 12

17 -

Impact area v. 13

18 -

Form-fitting element

19 -

spigot

20 -

mortise

21 -

threaded hole

22 -

ring groove

23 -

outer periphery

24 -

groove base

25 -

outer surface

26 -

side leg

27 -

side leg

28 -

admission

29 -

threaded end

30 -

End of v. 10

31 -

Through Hole

32 -

cylinder head screw

33 -

threaded hole

34 -

printing plate

35 -

pushpin

36 -

support ring

37 -

End of v. 35

38 -

blind hole

39 -

Riffel section

40 -

Riffel section

41 -

Ring segment v. 36

42 -

Ring segment v. 36

43 -

bolts

44 -

Impact area v. 41

45 -

Impact area v. 42

46 -

Form-fitting element

47 -

spigot

48 -

mortise

49 -

threaded hole

50 -

step

51 -

ring surface

52 -

ring surface

53 -

End of v. 6

54 -

paragraph

55 -

press unit

56 -

hydraulic cylinders

57 -

screw

58 -

external thread

59 -

Basic body v. 57

60 -

inner thread

61 -

drilling

62 -

End of v. 57

63 -

Operation polygonal

64 -

End of v. 57

65 -

Spigot

E -

level

Claims (12)

1. Device for dismantling a hub (2) from a bearing (7) in an axle journal (3), which encompasses a flange plate (9), which is supported by studs (10) on the hub flange (4) and a provided pressure plate (34), which uses thrust bolts (35) on a thrust ring (36) to support itself, whereby the thrust ring (36) is arranged between the axle journal (3) and the hub (2) and the thrust bolts (35) are threaded through threads (5) in the hub flange (4) and a press unit (55) can be inserted between the flange plate (9) and the pressure plate (34), characterised by a flange adapter (11), which can be fixed at the hub flange (4) and protrudes over the hub flange(4) and the flange adapter (11) shows receptacles (28) for the thrust bolts (10), which can be coupled to the flange adapter (11).
2. Device according to claim 1, characterised by the receptacles (28) through threaded holes in the flange adapter (11), into which the thrust bolts (10) can be screwed with one end of the thread (29).
3. Device according to claim 1 or 2, characterised by the flange adapter (11) which is circular shaped and consists of two ring segments (12.13) which can be coupled.
4. Device according to at least one of the claims 1 to 3, characterised by the flange adapter (11) showing a ring nut (22) which encompasses the outer circumference (23) of the hub flange (4) with the ring nut (22).
5. Device according to claim 3 or 4, characterised by the ring segments (12, 13) being connected by bolts (14) across their plane (E).
6. Device according to claim 3 to 5, characterised by the contacting butt joint surfaces (16, 17) of ring segments (12, 13) constituting form fit elements (18).
7. Device according to claim 5 and 6, characterised by the form fit elements (18) being formed by studs (19) and stud holes (20), and the bolts (14) penetrating the studs (19).
8. Device according to at least one of the claims 1 to 7, characterised by the press unit (55) encompassing a hydraulic cylinder (56) and a threaded spindle (57).
9. Device according to claim 8, characterised by the threaded spindle (57) with its base body (59) penetrating a drill hole (61) in the flange plate (9).
10. Device according to at least one of the claims 1 to 9, characterised by the support ring (36) which is formed by two ring segments which can be coupled (41, 42), and can be joined by bolts (43), with the contacting butt joint surfaces (16,17) of ring segments (41,42) constituting form fit elements (46).
11. Device according to claim 10, characterised by the form fit elements (46) being formed by studs (47) and stud holes (48) and the bolts (43) penetrating the studs (47).
12. Device according to at least one of the claims 1 to 11, characterised by two stepped (50) ring surfaces (51, 52) being provided in support ring (36).

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