AU637381B2

AU637381B2 - Motorised drive with multi-step gearing

Info

Publication number: AU637381B2
Application number: AU58669/90A
Authority: AU
Inventors: Horst Damm
Original assignee: Mannesmann AG
Current assignee: Vodafone GmbH
Priority date: 1989-08-03
Filing date: 1990-07-04
Publication date: 1993-05-27
Anticipated expiration: 2010-07-04
Also published as: EP0411730A3; DE3925937A1; EP0411730A2; AU5866990A; DE59007745D1; EP0411730B1; NZ234433A

Description

AUSTRALIA

PATENTS ACT 1952 Form COMPLETE SPECIFICATION

(ORIGINAL)

FOR OFFICE USE Short Title: Int. Cl: Application Number: Lodged: Complete Specification-Lodged: Accepted: Lapsed: Published: Priority: Related Art: c,.

TO BE COMPLETED BY APPLICANT So Name of Applicant: MANNESMANN AKTIENGESELLSCHAFT Address of Applicant: MANNESMANNUFER 2 D-4000 DUSSELDORF 1 FEDERAL REPUBLIC OF GERMANY Actual Inventor: Address for Service: GRIFFITH HACK CO., 601 St. Kilda Road, Melbourne, Victoria 3004, Australia. Complete Specification for the invention entitled: MOTORISED DRIVE WITH MULTI-STEP GEARING The following statement is a full description of this invention including the best method of performing it known to me:i| ;ii 2 The present invention relates to a motorised drive with multi-step gearing for an external sleeve, in particular for a wheel or for a drum, which is mounted on a bearer sleeve located on a fastening plate.

In the case of a wheel reduction gearing known from the German Patent DE 34 10 866 C 2, the planetary gearing steps, with the exception of the output step, are located within the bearer sleeve. The output step, with its planetary step, is connected non-rotatably to the bearer sleeve by means of a peripherallytoothed head end of the bearer sleeve. A cover is used to enclose the gearing.

This type of construction prevents any extension of the bearer sleeve out beyond the output step in order to introduce additional •forces and turning moments into the bearer sleeve.

o From the German Patent DE 27 40 090 C 2, a self-locking, manually oe. actuated winch is known, which possesses a winch drum with a longitudinally-separated self-locking groove. The upper part of the self-locking groove is stationary and is provided with a ropeguiding arm. The drum is mounted on a bearer sleeve, and when seen 20 from the fastening plate of the bearer sleeve, after the engageooo •ment with the drive gear wheel, it is located approximately at the middle of the bearer sleeve. Located inside the bearer sleeve, there is a drive axle which drives the drum by way of a drive gear 00 o. opposite to the input drive side.

The slender configuration of the bearer axle and the relatively large distance of the bearing to the fastening plate has proved to be a disadvantage, because undesired tilting movements are favoured thereby. The arrangement of the input drive axle makes it difficult to have a compact construction for the winch.

The problem to be solved by the invention is how, to create a motorised drive of the general type referred to initially, which has a robust and compact construction, can provide a high output 3 torque, can take up high radial loads and, in addition, on the side facing away from the fastening plate, provides an access point for the additional introduction of forces and moments.

The present invention provides a motorised drive with multi-step gearing for an external sleeve, in particular for a wheel or for a drum, which has internal peripheral toothing and which is mounted on a bearer sleeve located on a fastening plate, a bearing arranged between the bearer sleeve and the external sleeve wherein the gearing is located predominantly within the bearer sleeve and wherein the ratio of a distance L which extends from the fastening plate, parallel to the central axis I of the gearing, up to 15 the outer end of the external bearing which faces away from the fastening plate, to the internal diameter d of the bearer sleeve, has a value between 0.8 and 1.5, and wherein the bearer sleeve has apertures in the side thereof immediately behind the bearing through which output drive 20 gear wheels of the gearing pass and mesh with the internal peripheral toothing of the external sleeve, and the bearer sleeve continues over and beyond the apertures up to a total length S at least 1.3 times the distance L.

In accordance with the present invention, the special constructional configuration of the bearer sleeve has the objective of lengthening it over and beyond the output drive step and thus to provide the possibility of introduction of additional forces and moments by means of i 30 arbitrarily selected constructive elements. In addition to Sthis, the bearer axle, which is configured as a sleeve, I because of the favourable ratio of its length to its diameter, possesses a high degree of rigidity and offers a large space for the accommodation and protection, against F C2 3A external influences, of the gearing and partly of the motor also. The preferred mounting of the outer sleeve on tapered roller bearings in an arrangement, is distinguished by high bearing capacity and stability against tilting. The reduced diameter of the bearer sleeve in the region of the head of the bearer sleeve results in a diminution of the sealing surface between external sleeve and bearer sleeve. A support bearing in combination with sealing at this location, and the diminished sealing surface, result in an effectual sealing of the gearing.

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4 The driving of self-locking sail winches is an important field of application of the invention. This special type of winch possesses a drum with a clamping groove. A stationary rope guiding arm guides the rope into the groove or else it releases the clamped rope from it. The drive in accordance with the present invention provides the required fastening point for the non-rotatable reception of the rope guiding arm, in the form of a carriedthrough stable bearer sleeve. The high tensile forces generated in the rope (for example, approximately 120 Kn for a drum diameter of 425 millimetres) are safely transferred to the boat deck by way of the rigid bearer sleeve of the gearing.

Another field of application is the wheel drive of earth-moving building construction machines (for example, caterpillar-chains).

The fastening arm of the shovel or of a bulldozer blade can be rotatably mounted, directly on the passed-through bearer sleeve of the wheel drive, without the need for an additional fastening element to be provided on the vehicle itself.

Preferred embodiments of the invention will now be described with reference to the accompanying drawings, in which: Fig. 1 is a diagrammatic cross-section through a motorised drive intended for use as a sail winch, Fig. 2 is a diagrammatic cross-section through another embodiment of a motorised drive.

Fig. 1 and 2 depict a bearer sleeve 10 of internal diameter d "3 which is connected to a fastening plate 40 by way of the flanged foot 11 of the bearer sleeve. Within the bearer sleeve 10 there is the gear mechanism 30. This gear mechanism consists of planetary gears, of which the sun wheel of the input drive step is driven by the motor M. The output drive gear wheels 32 of the output drive step 31 project out through openings 13 in the bearer sleeve 10. On the outside of the bearer sleeve 10 there is an external sleeve 20 which is mounted on bearings 21 and 22. The I: 'I :i external sleeve 20 has internal peripheral toothing 26 which meshes with the output drive gear wheels 32 of the output drive step 31. The external sleeve 20 is additionally mounted on a support bearing 23 provided with the seal 24. The length of the arrow L indicates the distance from the fastening plate parallel to the central axis I of the gearing, up to the side of the external bearing 21 which faces away from the fastening plate 40. The overall length of the bearer sleeve 10 is shown by the arrow S.

C

Fig. 1 depicts the external sleeve 20 configured as a rope drum provided with a clamping groove 25 located at the end of the external sleeve furthest away from the fastening plate 40. The head 12 of the bearer sleeve 10 has a splined end to engage with the internal toothing 15 of the rope guiding arm 14.

15 The embodiment shown in Fig. 2 has an additional sleeve 16 rotatably mounted on the head 12 of the bearer sleeve 0* e o *go1

Claims

2. The motorised drive according to Claim 1, wherein the bearing comprises tapered roller bearings which mount the external sleeve concentrically on the bearer sleeve.
3. The motorised drive according to Claim 1, wherein the bearer sleeve is reduced in diameter beyond the apertures.
4. The motorised drive according to- Claim 3, wherein the external sleeve is mounted on a support bearing on the reduced diameter portion of the bearer sleeve. The motorised drive according to Claim 2, wherein *r *I M 7 the external sleeve is provided at one end with a clamping groove for a rope.
6. The motorised drive according to Claim 3, wherein there is an additional bearer element provided on the bearer sleeve in the region of the reduced diameter portion of the bearer sleeve.
7. The motorised drive according to Claim 6, wherein the bearer element is a stationary rope-guiding arm directed radially in relation to the bearer sleeve. o* 8. The motorised drive according to Claim 7, wherein the rope-guiding arm detachably engages by way of internal toothing with a splined end of a reduced diameter portion of the bearer sleeve.
9. The motorised drive according to Claim 6, wherein I o the bearer element is a rotatable additional sleeve. Dated this 10th day of March 1993 ANNESNESMANN AKTIENGESELLSCHAFT By Its Patent Attorneys: GRIFFITH HACK CO. Fellows Institute of Patent Attorneys of Australia. 1 V b *s ©A 1 J