DE3404918A1 - Air-operated gear motor - Google Patents

Abstract

The air-operated gear motor 1 of the invention has an internal gearwheel 19 with internal toothing 20, which is supported radially and axially, via a deep-groove ball-bearing 24, partially in the motor casing 2 and partially in the casing cover 4. The deep-groove ball-bearing 24 is aligned centrally with respect to the internal toothing 20. By the use of a deep-groove ball-bearing 24 with shoulders on both sides of the balls and by the central alignment of the internal toothing 20 and the deep-groove ball-bearing 24, it is possible to dispense with any further support for the output stub shaft 22, making the motor casing 2 shorter. In addition, the manufacturing outlay is reduced since, in comparison with two-print support, the work involved in the accurate machining of the bearing locations of the second bearing and the associated outlay on materials are eliminated. <IMAGE>

Description

G. Düsterloh GmbH, 4322 Sprockhövel Druc kluft zahnradmot or

The invention is directed to a compressed air gear motor, preferably for inclusion in hoists and lifting beams, in particular d, it underground mining, according to the characteristics in the preamble of claim 1.

The known type of compressed air zahnr admot or s designed in this way is comparatively long, so that its

a-
Area of application is inevitable / restricted. In particular, the use in underground mining operations with the cramped conditions that exist there leaves something to be desired. The cause of the overall length and thus also the weight is essentially the fact that both the ring gear and the output shaft stub are each supported by roller bearings in the front cap of the motor housing. In addition to the greater expenditure of material for the motor housing, however, a greater expenditure is also required for the production and precision machining of the areas receiving the roller bearings. There are also the costs for a roller bearing.

The invention is based on the object of the pneumatic gear motor described in the preamble of claim 1 to improve so that while reducing the cost of materials and machining, the dimensions of the motor housing can be kept smaller and thus the range of possible uses is increased.

This object is achieved according to the invention in those listed in the characterizing part of claim 1 Features.

Due to the arrangement of the deep groove ball bearing in the same Transverse plane like the ring gear and due to the central alignment of the deep groove ball bearing with the internal toothing of the With the ring gear, all radial forces are now directed centrally into the deep groove ball bearing. The shoulders on both sides of the deep groove ball bearings ensure the absorption of all axial, radial and tilting forces. The output shaft stub can be made shorter by about half compared to the known design. Pollich builds the whole Motor shorter. It is therefore smaller in its external dimensions and lighter in terms of weight. This is Integration is now also possible in units that previously relied on other types of compressed air motors was. Since the housing is shorter, less material is needed, which leads to a considerable saving in weight. The processing effort is considerably reduced, since the precise processing for the support of the shaft stub Rolling bearings that were previously required are no longer necessary. The costs for the second roller bearing, which was previously necessary, are also transferred to Portfall.

Due to the features of claim 2, the wall thickness of the ring gear in the toothing area can now be thinner be measured. The snap ring is located in the immediate vicinity of the base of the ring gear, which is already more stable and no longer at the open end. The radial collar can thus be kept comparatively narrow, since it only has to absorb axial forces.

With a view to the fact that, according to claim 3, the outer ring of the deep groove ball bearing partially engages in the motor housing, a pre-centering is achieved so that the lid of the Motor housing directly for axial and radial fixation

and support of the deep groove ball bearing and thus the ring gear, can be used with attached output shaft stub. This training also contributes to the fact that the Manufacturing effort is reduced in the sense of a more economical production.

The assembly of the motor according to the invention is further simplified by the features of claim 4. To this Way, it is possible to use the complete rotor housing with internals in the cylindrical interior of the motor housing.

With the help of the features of claim 5 is a comparative achieved simple form of a torque support of the pneumatic gear motor.

The second stub shaft of the output rotor is expedient according to the features of claim 6 by the Centering stub out. The brake rotor is roughly cup-shaped designed. It has a toothing on the circumference. On this toothing is a correspondingly toothed brake disc attached. This is connected to the brake rotor in a rotationally fixed manner, but can be moved in the axial direction. So will the When the ring piston is acted upon by the spring force, the brake disk assigned to the ring piston presses against the brake disk of the brake rotor and further against the brake disc assigned to the rear wall of the motor housing. When charged with Compressed air is displaced against the spring force of the annular piston, so that the brake disk assigned to the brake rotor comes out of contact with the two adjacent brake disks of the rotor housing and the annular piston.

Finally, it is also useful if, according to claim 7, all braking elements are in one on the rear wall of the motor housing

fixable brake housing are provided. The brake housing can be removed, e.g. if no brake is required.

The invention is described below with reference to an exemplary embodiment of a compressed air gear motor shown in the drawing explained in more detail.

The illustrated pneumatic gear motor 1 has a cast Motor housing 2 with a one-piece molded rear wall 3 and a detachably attached cover 4. In the walls 5 of the Motor housing 2 or in the walls 6 of the housing cover 4 are recesses 7 and channels 8 / for supplying and removing the Compressed air provided. 8a

The motor housing 2 has a cylindrical interior 9 for the axial assembly of an inner end wall 10 of a rotor ■ housing 11, the rotor housing 11 with gear rotors 12, I3 and rotor bearings 14 and an outer end wall 15 of the rotor housing 11. The end walls 10, 15 are braced against one another by means of screws (not shown). Sealing elements are designated by 16, which seal the rotor housing 11 with respect to the motor housing 2.

At the free end of the output shaft 17 of the output rotor 13, an externally toothed output pinion l8 is arranged, which into a cup-shaped hollow gear I9 with internal teeth 20 meshes with this internal toothing 20 engaging.

The output shaft stub 22 of the motor 1 is attached to the bottom 21 of the ring gear 19. He is about a circumferential Seal 23 against the housing cover 4 sealed.

The ring gear, 19 is together with the output shaft stub 22 via a single deep groove ball bearing 24 on the one hand Motor housing 2 and, on the other hand, supported on the housing cover 4. The housing cover 4 also takes on the axial fixation of the deep groove ball bearing 24 and thus the ring gear 19, the outer ring 25 of the deep groove ball bearing 24 by a Shoulder 26 on the housing cover 4 against an axially protruding collar 27 of the outer end wall 15 of the rotor housing 11 is pressed.

The deep groove ball bearing 24 and the internal teeth 20 of the Ring gear 19 are in the same, at right angles to the axis of rotation 28 of the output shaft stub 22 extending transverse plane. The ring gear 19 is supported by the deep groove ball bearing 24 enclosed in a central alignment to the internal toothing 29.

The axial position of the deep groove ball bearing 24 on the ring gear 19 is on the one hand by a radial collar 29 on open end of the ring gear 19 and on the other hand through one in the area of the bottom 21 of the ring gear 19 into a circumferential groove embedded snap ring 30 determined.

The inner end wall 10 of the rotor housing 11 is provided with an axially projecting, eccentrically arranged centering stub 31 provided, which in a recess 32 in the rear wall 3 of the motor housing. 1 intervenes. This arrangement serves to support the torque of motor 1.

The output rotor 13 has a second stub shaft 33j which penetrates the centering stub 31 in the middle and on which a pot-like brake rotor 34 is wedged in a rotationally fixed manner. A snap ring 35 secures the axial position of the brake

COPY

■■ '. ^. ■ ** - ^: ihtju; .r-'

rotors. 34. The circumference of the brake rotor 34 has a Toothing 36. An internally toothed one engages in this toothing 3β Brake disc 37 a. This brake disk 37 is consequently connected to the brake rotor 34 in a rotationally fixed manner, however relative to the brake rotor 34 displaceable in the axial direction.

On the outside of the rear wall 3 of the motor housing 2, a brake housing 38 with a cover 39 is detachably fixed. In the brake housing 38, an annular piston 40 is arranged to be axially displaceable. Sealing elements 4l are used to seal a channel 42 can be acted upon with compressed air pressure chamber 43 between a Shoulder 44 of the brake housing 38 and. a radial collar 45 of the Ring piston 40.

The annular piston 40 is by a helical compression spring 46, which on the one hand against the housing cover 39 and on the other hand, is supported against a radially inwardly projecting collar 47 of the annular piston 40, in the direction of the rear wall 3 of the motor housing 2 is loaded. A brake disk 48 and a brake disk are provided on the end face of the annular piston 40 Another brake disk 49 is on the end face of an axial collar 50 the rear wall 3 arranged.

If there is consequently no fluid pressure in the pressure chamber 43,!

turn!

the brake disk 37 firmly connected to the brake rotor 34 / is clamped between the two other brake disks 48, 49 and the output rotor 13 braked. When the Pressure chamber 43, the spring force is canceled and the output rotor 13 released. '

104/30781 ' 34049 1 $ R / an

Reference sign list;

1 engine

2 motor housings

3 back wall of 2

4 lids of 2

5 walls of 2

6 walls of 4

7 recesses in

8 channels

9 interior of 2

10 front wall of 11

11 rotor housing

12 rotor

13 ".

14 rotor bearings

15 end wall of 11

16 sealing elements

17 output shaft of

18 output pinions

19 ring gear

20 internal teeth

21 floor of 19

22 Output shaft stub

23 Seal

24 deep groove ball bearings

25 outer ring of 24

26 shoulder on 4 -

27 fret to 15

28 axis of rotation of 22

29 radial collar

30 snap ring

31 centering nozzle

32 recess in 3

33 Stub shaft 34 Brake rotor 35 Snap ring 36 Toothing on 34 37 Brake disc on 34 38 Brake housing 39 Cover of 38 40 Ring piston 41 Sealing elements 42 channel 43 Printing room 44 Shoulder on 38 45 Rad.ialbund 46 feather 47 Confederation at 40 48 Brake disc on 40 49 ¹¹ to 50 50 Axial collar on 3

8a channel

CO? *. '

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Claims (7)

ρατε6ιτλν: \ «: αιτε: ■: · DR.-ING. W. CHAIRMAN - DIPL-ING. R. WILLERT DR.-ING. P. H. OIDTMANN Io FILING NO. IO4 / 3O78I 403OBOCHUMI. 10.02.1984 ^ Post box 1O24BO Your reference BergatraBe 1BS Fernruf O2 3 * / B 19 B7 Telegr · Stuhlmann patent ~ Telex 82B 3S1 »wop d Patent claims: 1. Compressed air gear motor, preferably for integration in hoists and lifting beams, especially underground Mine operation, in which the externally toothed output pinion of the output rotor with the internal toothing on a peripheral side A ring gear supported at least indirectly on the motor housing via a roller bearing fixed in the longitudinal direction meshes, which is connected to the output shaft stub of the engine, characterized in that, that the ring gear (19) and the output shaft stub (22) together via a single deep groove ball bearing (24) on the a rotor housing (11) enclosing motor housing (2) are supported, wherein the deep groove ball bearing (24) and the internal toothing (20) of the ring gear (19) -in. same, at right angles to the axis of rotation (28) of the output shaft stub (22) are arranged transverse plane and the ring gear (19) is enclosed by the deep groove ball bearing (24) in / central alignment to the internal toothing (20). 2. Compressed air gear motor according to claim 1, characterized characterized in that the axial position of the deep groove ball bearing (24) on the ring gear (19) on the one hand by a radial collar (29) at the open end of the ring gear (19) and, on the other hand, by one in the area of the radially aligned one Bottom (21) of the ring gear (19) embedded in a circumferential groove snap ring (30) is determined. 3. Pneumatic gear motor according to claim 1 or 2, characterized in that the Outer ring (25) of the deep groove ball bearing (24) partially into the Engages the motor housing (2) and, on the other hand, is supported radially and axially by the housing cover (4). 4. Compressed air gear motor according to one of the claims 1 to 3, characterized in that the motor housing (2) has a cylindrical interior (9) for the axial assembly of the inner end wall (10) of the rotor housing (11), rotor housing (11) with rotors (12, 13) and Rotorslagerungert (14) and outer end wall (15) of the rotor housing (11). 5. Pneumatic gear motor according to claim 4, characterized characterized in that the inner end wall (10) of the rotor housing (11) is provided with an axially projecting, eccentrically arranged centering stub (31), which engages in a recess (32) in the rear wall (3) of the motor housing (2). 6. Compressed air gear motor according to one of the claims 1 to 5, characterized in that the output rotor (13) has a second stub shaft (33) for fastening an externally toothed brake rotor (3 * 0, whose with it rotatably, but axially relatively displaceable connected circumferential brake disc (37) between two further brake discs (48, 49) engages, of which the a brake disc (49) of the rear wall (3) of the motor housing (2) and the brake disc (49) one through in the braking direction Is assigned to spring force (46) and in the venting direction can be acted upon by compressed air annular piston (40). 7. Compressed air gear motor according to claim 6, characterized in that the braking elements (34, 37, 40, 46, 48, 49) are provided in a brake housing (38) which can be fixed on the rear wall (3) of the motor housing (2).