DE4345389C2 - Roller drive unit - Google Patents

Description

The invention relates to a roller drive unit for driving of objects on a conveyor track according to the generic term of claim 1.

Such a roller drive unit is, for example, from the US 5,042,645 known. It is used to contai to move in the cargo hold of a cargo plane. This to order is relatively complex.

DE 41 01 283 A1 is a similar roller drive unit known in which the drive motor within the drive roller  is arranged. This arrangement is relatively large relying.

The invention has for its object a drive unit of the type mentioned to further develop that high stability despite simple and small construction is achieved.

This object is achieved by those mentioned in claim 1 Features alternatively or cumulatively solved.

A roller drive unit is described in DE 42 24 818 ben, in which the swivel bracket also end swivel approaches, through which the drive shaft extends stretched through so that it is essentially kept clear of lateral forces. The drive shaft is mounted on one of its ends inside the swivel bracket and on hers other end on their frame. The swivel bracket is over Roller bearings stored in the frame. Now that the drive shaft only stored within the swivel bracket is a simple, yet compact structure. sliding This applies to the design of the swivel bearings as plain bearings bushings.

The following is a preferred embodiment of the invention explained in more detail using the attached figure. This shows a roller drive unit in a partially cut Top view.

In the roller drive unit shown in the figure, the drive roller 10 comprises a swivel bracket 20 in its interior, on which a sleeve 12 is rotatably supported via sleeve bearings 13 , 13 '. On the outer circumference of the sleeve 12 , a jacket 11 made of a material with a high coefficient of friction is applied non-slip.

Inside, the sleeve 12 has a ring gear 15 which is connected to a shaft gear 16 via a pair of intermediate gears 17 in a rotationally fixed connection. The intermediate gears 17 , 17 'are rotatably mounted on a trained as a screw inter mediate gear carrier 18 .

The intermediate gear pair 17 , 17 'is supported on the swivel bracket 20 on one of its end faces. On the other end face of the Zwischenzahradpaars 17, 17 'sits a brake 19, the couple 17, depending on the screw-in depth of the intermediate gear carrier 18, more or less high braking forces to the intermediate gear 17' applies. These braking forces are used to branch off part of the drive power of an electric motor (not shown) or its torque for pivoting up the drive roller 10 , as is known per se.

The pivot bracket 20 has on both end faces of the drive roller 10 protruding pivot lugs 24 , 24 '. Egg ner of the pivot lugs ( 24 ) is provided with a to its outer circumference coaxial bore through which an on drive shaft 14 , on which the above-mentioned shaft gear 16 is placed, protrudes into the pivot bracket 20 . At its inner end, the drive shaft 14 is mounted by means of an inner Wellenla gers 22 'in the swivel bracket 20 . The drive shaft 14 is mounted in the bore of the pivoting lug 24 by means of an outer shaft bearing 22 , so that the drive shaft 14 is supported in an extremely stable manner on both sides. The fact that the outer shaft bearing 22 is arranged in the region of the pivoting lug 24 can ensure a very compact construction of the drive roller 10 with large-sized sleeve bearings 13 , 13 '.

The pivot lugs 24 , 24 'sit in pivot bearings 21 , 21 ', which are preferably designed as bronze plain bearings.

At the outer end of the drive shaft 14 , a drive gear 23 is rotatably attached, which meshes with (not shown) between gears of a gear train, via which the torque of the (not shown) drive motor is transferred to the drive roller 10 .

The pivot bearings 21 , 21 'are inserted into a recess which is formed in one half in an upper frame part 32 and the other half in a closure flap 33 . The closure flap 33 is articulated via joints 34 on the upper frame part 32 and secured by means of bolts 35 , 35 'in the closed state. In this state, the pivot bearings 21 , 21 'are clamped between the closure flap 33 and the upper frame part 32 . If you open the bolts 35 , 35 ', you can swivel the flap 33 upwards and remove the drive roller 10 together with the swivel bearings 21 , 21 ' and replace them with a new "unit".

Recesses 36 , 36 'for receiving the drive gear 23 are formed in the closure flap 33 and in the upper frame part 32 .

The upper frame part 32 is connected to a lower frame part 31 by means of screw bolts (not shown). The connection level is preferably placed such that the intermediate gears of the gear train together with their bearings and the drive motor are first inserted into the lower frame part 33 and then secured by fitting the upper frame part 32 . The lower frame part 31 and the upper frame part 32 together form a motor receiving space 37 and a further receiving space 38 for receiving electronic construction groups, so that all dirt and moisture sensitive parts of the drive roller unit are completely sealed by the frame 30 against environmental influences. The frame men 30 forming parts 31-33 are preferably cast from Leichtme tall and due to the con struction shown here only in a few sections, in particular in the area of the gear train bearings and in the area of the (end) receptacle of the electric motor and possibly the parting surfaces between the frame parts are reworked, in particular drilled or milled. This will not only work on the assembly of the roller drive unit, but in particular on the work on the maintenance of the roller drive unit, z. B. when replacing modules up to the motor and electronics considerably easier.

LIST OF REFERENCE NUMBERS

10

capstan

11

coat

12

shell

13

.

13

'' Sleeve bearing

14

drive shaft

15

ring gear

16

shaft gear

17

.

17

'Intermediate gear

18

Intermediate gear carrier

19

brake

20

swiveling holder

21

.

21

'' Pivot bearing

22

.

22

'' Shaft bearing

23

drive gear

24

.

24

'' Swivel approach

25

sliding disk

30

frame

31

lower frame part

32

upper frame part

33

flap

34

joint

35

.

35

'' Bolt

36

recess

37

Motor housing space

38

Electronic space

Claims (2)

1. roller drive unit for driving objects on a conveyor track with a drive unit for driving a drive roller ( 10 ) with a drive shaft ( 14 ) transmitted drive torque, the drive roller ( 10 ) being rotatably mounted on a swivel mount ( 20 ) which on a frame ( 30 ) is pivotally mounted so that the drive roller ( 10 ) from a lower rest position to a higher working position by means of pivoting devices ( 17-19 ) about an axis of rotation of the drive roller ( 10 ) eccentrically arranged pivot axis (O) Swivel bracket ( 20 ) is movable, characterized in that
that the swivel bracket ( 20 ) on both sides of the drive roller ( 10 ) has projecting swivel projections ( 24 , 24 ') on the ends, which are pivotably mounted in the frame ( 30 ) via swivel bearings ( 21 , 21 '), the drive shaft ( 14 ) passing through one in one of the swivel lugs ( 24 ) hese coaxial bore extends and outside of the swivel lug ( 24 ) is connected to an end drive gear ( 23 ) which is arranged in a recess ( 36 ) of the frame ( 30 ), and
that the drive shaft ( 14 ) is rotatably mounted via bearings ( 22 , 22 ') arranged in the swivel neck ( 24 ) and the swivel bracket ( 20 ) and that the swivel bearings ( 21 , 21 ') are designed as plain bearing bushes. 2. Roller drive unit according to claim 1, characterized in that the mounting of the drive shaft ( 14 ) within the coaxial bore, an inner bearing ( 22 ') for mounting the drive shaft ( 14 ) at its end opposite the drive gear ( 23 ) and in the pivoting approach ( 24 ) arranged outer bearing ( 22 ).