GB2245664A

GB2245664A - Adjustably mounted bearings

Info

Publication number: GB2245664A
Application number: GB9112866A
Authority: GB
Inventors: Ing Hermann Osthoff; Alfred Bernd
Original assignee: Mannesmann AG
Current assignee: Vodafone GmbH
Priority date: 1990-06-15
Filing date: 1991-06-14
Publication date: 1992-01-08
Anticipated expiration: 2011-06-14
Also published as: GB9112866D0; ITMI911572A1; FR2663315A1; IT1248008B; ITMI911572A0; DE4019561C2; GB2245664B; FR2663315B1; DE4019561A1

Abstract

A bearing holder body (10) is adjustably mounted in the web plate (4) of a frame by means of an adjustment bolt having a shank and an eccentric head, both of which extend with minimal clearance through bores in the body (10) and plate (4) respectively. By rotation of the bolt, the camber of a wheel (1) mounted on an axle (2) extending between two such bearings (3) relative to the frame, can be adjusted. The head of each bolt is provided with a hexagonal socket so that the head can be rotated. <IMAGE>

Description

Adjustable bearing for a running wheel -- ' e- ' r -.-1 1 i The invention

relates to an adjustable bearing for a wheel running on an axle mounted in two bearing holder bodies supported on web plates of a frame such as crane travelling gear or a headstock. In such bearings, the holder bodies can be adjusted forward or backwards, in a pivotal movement.

German Patent Specification No. 36 10 426 discloses a bearing of the above type which enables the paraxiality of the wheel to be adjusted. However, it is often also desirable to correct the camber of the wheel, i.e., to adapt the vertical arrangement of the wheel to the rail surface and to the girder of the supporting frame, where the plates on which the bearing is supported are not always arranged exactly vertically. The present invention addresses this problem and proposes that the pivot of each bearing holder body is designed as an eccentric. More particularly, in an adjustable bearing according to the invention each bearing holder body is movable relative to its respective plate and in the plane thereof by means of an adjustment bolt comprising a shank and an eccentric head, each of which extends with minimal clearance through a bore in one of the web plate and bearing holder body whereby rotation of the bolt causes said relative movement. With this form of adjustment bolt, the heights of the two bearing holders of an axle of the running wheel can be corrected with respect to the relevant web plate such that the running surface of the wheel is adapted to the travelling surface of its respective supporting rail.

In preferred embodiments of the invention, the eccentric head of the adjustment bolt has a hexagonal socket and the shank has a thread for a nut which presses a thrust collar against the web plate. For securing the bearing holder after adjustment, the web plates may have a plurality of holding bores for screws or clamping bolts 2 which pass therethrough. These bores are sufficiently oversize to accommodate any necessary adjustment. The clamping bolts may also pass through a pressure plate lying against the web plate. The bearing holder body will normally include an axle journal which extends through an opening therefor in the respective web plate. Thus, a pressure plate if used, will extend around the axle journal, and have additional openings for the thrust collar on the adjustment bolt and the clamping bolts.

An embodiment will now be described by way of example and with reference to the accompanying drawings wherein:

Figure 1 is a side view of an adjustable bearing according to the invention; Figure 2 shows a vertical cross-section through the bearing of Figure 1 to a larger scale; Figure 3 is a further enlarged partial cross-section taken on line III- III of Figure 1 showing the mountings of an adjustment bolt and a clamping bolt; and Figure 4 shows a pressure plate.

In order to easily illustrate the possibility of adjustment of the running wheel with respect to its frame in accordance with the invention, the inclination thereof is exaggerated in Figure 2.

As shown in the drawings, a running wheel 1 travels on a rail 34 and is supported by its axle 2 via bearings 3 in bearing holders 10 which are attached to web plates 4 of the crane girder 5. The hub of the running wheel 1 is supported via spacer rings 6 on the bearings 3, which are held in annular grooves 9 of the bearing holders 10 via exchangeable spacer discs 7 and spring rings 8. Each bearing holder has a axle journal 11 for receiving the bearing 3 and forcing cams 15, visible in Fig. 1, for set screws 13 which are passed through screw supports 12 of the crane girder 5 and are secured with lock nuts 14. The set screws 13 are used to set the paraxiality of the wheel 1.

3 The adjustment bolt or eccentric 16 shown in Figure 3 provides for adjustment of the height of each bearing holder and thus set the camber of the running wheel 1. The eccentric head 18 thereof without play in a bore 23 of the bearing holder 10 and the eccentric shank 17 is similarly guided without play in a bore 24 of the web plate 4. The height of the bearing holder 10 is corrected relative to the web plate 4 by twisting the eccentric 16 by means of a key introduced into a hexagonal socket 19 of the eccentric head 18. In order to permit this movement, the plate 4 has a bore 27, which is larger than the axle journal 11 which passes therethrough. After setting the desired position, the nut 21 is turned on the thread 20 of the eccentric shank 17 and presses the thrust collar 22 against the web plate 4.

The bearing holder 10 is braced and secured on the web plate 4 by means of the clamping bolts 25 and nuts 33 shown in the lower part of Figure 3. Holding bores 26 of the bearing holder 10 as well as bores 27 of the web plate 4 are larger than the diameter of the screw 25 by an adjustment play 32.

In the illustrated embodiment, the bearing has a pressure plate 28, shown in Figure 4, on the inside of the web plate 4. This has a central bore 29 for the axle journal 11, four bores 30 for the clamping bolts 25 and a hole 31 for the thrust collar 22. The bores and hole are larger than the diameter of the parts which are passed therethrough, again by the adjustment play 32.

4 claims 1. An adjustable bearing for a wheel running on an axle mounted in two bearing holder bodies supported on web plates of a frame, each bearing holder body being movable relative to its respective plate and in the plane thereof by means of an adjustment bolt comprising a shank and an eccentric head, each of which extends with minimal clearance through a bore in one of the web plate and bearing holder body whereby rotation of the bolt causes said relative movement.

Claims

2. A bearing according to Claim I wherein the head of the adjustment bolt

has a hexagonal socket and the shank has an external thread for a nut with a thrust collar disposed between the nut and the respective web plate.

3. A bearing according to Claim I wherein each bearing holder body is secured to the respective web plate by clamping bolts extending through bores in the plate, the bores being oversize relative to the clamping bolts to accommodate said relative movement as aforesaid.

4. A bearing according to Claim 3 including a pressure plate held by the clamping bolts against the plate to clamp the web plate between the pressure plate and the bearing holder body.

5. A bearing according to Claim 2 and Claim 4 wherein the bearing holder body includes an axle journal which extends through an opening therefor in the respective web plate, the pressure plate extending around the axle journal, and having additional openings for the thrust collar on the adjustment bolt and the clamping bolts.

6. A bearing according ot Claim 5 wherein said openings in the pressure plate are each oversize relative to the parts that pass therethrough.

7. An adjustable bearing for a wheel mounted in a frame substantially as described herein with reference to the accompanying drawings.

Published 1991 at The Patent Office, Concept House. Cadiff Road. Newport. Gwent NP9 1RH. Further copies may be obtained from Sales Branch, Unit 6. Nine Mile Point. Cwmfelinfach, Cross Keys. Newport, NPI. 711Z. Printed by Multiplex techniques lid. St Marv Cray. Kent.