DE2320148A1 - AUXILIARY DRIVE - Google Patents

Description

Hs / M.

Fritz Kork K.G.

2400 Lübeck
Behind the cherry cottages 59/71

Auxiliary drive

The invention relates to an auxiliary drive between a Axis of a rail vehicle and a unit that can be driven by this axis, with an upstream unit Gearbox and with a drive pin arranged in the gearbox housing and toothed at both ends, the Establishes a drive connection between the axle and the gearbox during normal operation and for test purposes is at least so far axially outwardly displaceable that. he with his internal intermeshing from a corresponding one Toothing of the axis slides out.

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Such auxiliary drives can be used to drive any Serving units on rail vehicles. Their main advantage is that by pulling out the The drive pin interrupts the direct drive connection can. When the rail vehicle is at a standstill, the transmission can then be operated using a hand crank, to check the functionality of the units that are connected to the gearbox.

This is essential for auxiliary drives for air-conditioned wagons, such as refrigerated wagons or heated wagons for the transport of bananas. There must be functionality for insurance reasons of the level units driven by the auxiliary drive be checked after each loading. As a rule, these units are a generator, which supplies the electricity for fans and thermodynamic cooling or heating devices while driving.

In a known device of the type mentioned (DT-PS 1 059 489), the driving pin had to Checking the system must be completely withdrawn from the gearbox housing. In its place was the exit an auxiliary gear is introduced into the gearbox in order to then carry out the functional test using this auxiliary

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drive to be able to carry out. · This requires a considerable amount of effort. For one thing, there must always be a Auxiliary drive can be kept available. On the other hand, the activity / on specially trained personnel is required, which runs into difficulties at loading stations, since there normally only untrained staff must act.

In another known device of the type mentioned at the beginning (DT-GM 6 9o7 824), the driving pin only partially pulled to the outside, so far that its internal toothing from the corresponding toothing the axis wandered out. The manual drive of the gearbox to carry out the test procedure took place then via a back gear provided in the transmission housing, which was in direct engagement with the transmission and had an outwardly protruding square for placing a hand crank. Difficulties can arise with this device arise when pulling out and then re-threading the drive pin. The driving pin namely sits under a slide ex in a wall of the gear housing, the slide being released its security must be pushed aside to create a relatively limited access to the drive pin. On the one hand, these activities require a certain technical

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Incorrect understanding of what is available from the operating staff cannot necessarily be assumed, and on the other hand, a certain amount of tact. In no case can the necessary operating steps carry out with the thick protective gloves that are always used at loading stations.

The invention is based on the problem of avoidance the disadvantages indicated above to create an auxiliary drive of the type mentioned, which is a considerable offers simplified handling when carrying out the functional test and in the best possible way to the specifically with air-conditioned wagons is adapted to the given safety requirements.

To solve this problem, the auxiliary drive according to the invention is characterized in that the driving pin with its outer, a pin for plugging a hand crank having end in a relative to Gear housing is mounted axially displaceably guided sleeve and inside next to its outer toothing a middle toothing for engagement in the transmission carries.

If you want to switch the auxiliary drive from normal operation to test operation change over, you only need the sleeve

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pull outside. The drive pin then automatically moves with its internal toothing out of the corresponding one Toothing of the axis out. At the same time, its external toothing leaves the corresponding toothing of the transmission. Instead, however, the middle toothing of the drive pin engages immediately into the corresponding toothing of the gearbox. To as before, the driving pin is the direct one, after placing the hand crank on its outer end Drive element of the unit to be checked upstream Transmission.

It has been found that even heavy units can be controlled by direct drive via the driving pin permit. For example, in the case of a generator with an output of more than 1 kW, it is sufficient to run the generator for a short time to be driven at a very low speed so that it delivers only a fraction of its power. These However, power is sufficient to set the connected fans turning so far that the Can determine puncture ability of the system.

All of the required operations are extremely easy to carry out. It's just pulling out the sleeve and putting on the hand crank. Also pushing in the sleeve and threading the

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internal toothing of the driving pin in the associated Toothing of the axis does not cause any problems, since the driving pin is axially aligned over the sleeve is held. It is sufficient when pushing through Turn the hand crank to adjust the angle of engagement to feel.

Is, as it is further suggested, the sleeve lockable in its inner and in its outer position against axial displacement, so comes upon actuation of the auxiliary drive as an additional handle the respective loosening and engaging of the lock. However, this does not have to make the operation much more difficult, and especially not if, from another advantageous feature of the invention is made use of. This feature is that the sleeve is rotatably guided is and has radial projections that are in annular grooves, which their position according to the end positions of the sleeve correspond; as well as in axial grooves that connect the annular grooves to one another, one belonging to the gearbox housing Approach can slide. The sleeve is in its respective end position in the manner of a bayonet lock lockable.

The sleeve can readily be shaped so that it

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even when using extremely heavy work gloves can be grasped and twisted effortlessly. The sleeve is preferably provided with handle attachments. An operation So does not cause any manual difficulties and sets, since it is the function of a simple bayonet lock acts, also no special professional qualification in advance.

The sleeve advantageously carries a shoulder

- with the interposition of overlapping seals Pot. This helps to protect the mechanism against excessive pollution, even in rough railway operations to protect.

The sleeve is preferably provided with an anti-twist device Mistake. The anti-rotation device is mainly used when the auxiliary drive is needed before starting a journey has been brought into its normal division, i.e. if the gearbox has been coupled to the axle with the interposition of the drive pin. "Using the anti-twist device then there is no longer any risk of the driving pin loosening automatically.

A particularly advantageous embodiment of a Anti-rotation device is characterized in that the

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Sleeve at the outer end two parallel, flat wrench surfaces arranged as secants to the circumferential surface for engagement has a fuse element, which with a fitting over the sleeve opening and with a at the opening adjoining elongated hole is provided for engagement in the key surfaces and one in a Push-through opening on the gear housing carries matching projection. The opening of the fuse element is over inserted the sleeve and then moved so that the wrench surfaces migrate into the elongated hole. Simultaneously penetrates the projection of the locking element the push-through opening. The sleeve is thus fixed against twisting and can therefore not get out of her Axial locking released. In addition, the Securing element provides additional support for the drive pin in the axial direction.

Preferably the projection is provided with a hole, which, when the securing element is correctly placed, becomes common via a hole provided on the gearbox housing Picking up a seal comes to rest. The sealing of the auxiliary drive after the puncture test has been carried out is an essential point for air-conditioned wagons. Only if the functionality of all units has been proven and

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then the correct seal has been made, a possible liability for the wagon lender or its insurance. In the present case, a seal can only be carried out if the entire auxiliary drive is returned to its correctly mounted condition after the functional test has been completed Normal operation has been transferred.

Another advantageous feature is that the projection of a spring carries, which is at least a rearward leg after the securing element has been placed across the width of the Through opening spreads out. In this way, the securing element can be in its correct position be locked, with means that allow simple actuation, even with the use of work gloves allow.

Significant advantages are also achieved when the securing element is designed as a hand crank. So far it has always been an awkward business to provide for a hand crank, there hand cranks either had to be carried along or kept ready at the loading stations. They went accordingly often lost, and in many cases it yielded significant gains

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Loss of time to get a replacement hand crank. In the arrangement according to the invention result these problems no longer arise. The auxiliary drive can only be properly locked and sealed, if the hand crank has been attached so that it cannot be lost. It is an essential part of the auxiliary drive that can no longer be lost.

The auxiliary drive according to the invention can also be characterized in that the driver pin on his inner end carries a stop which, after pulling out the inner teeth of the drive pin from the corresponding Toothing of the axis comes to rest on a counter-stop attached to the axis. Herein lies a feature of independent importance that also applies to auxiliary drives is applicable, which do not have the characterizing features of the invention, provided they only have one have drive pins that can be pulled out in the axial direction.

■ The driving pin stelli; usually a predetermined breaking point that protects the connected transmission including the units from overloads. Has now been at a known device of the type mentioned (DT-GM 6 9o7 824) carried out a functional test, so

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As mentioned, you pulled the drive pin a little outwards to the direct drive connection to the axis to interrupt the rail vehicle. After completion of the functional test, the drive pin was again inserted to the inside, so far that its outer toothing slid into the associated toothing of the gearbox. It could not be guaranteed in any way that the driving pin itself actually was functional. So there was the possibility that although the transmission including the connected Aggregates in tact was that the auxiliary drive was not correctly attached to the axle of the rail vehicle could be coupled. Only with special care, but with regard to the qualification of the Operating personnel could not be guaranteed, the breakage of a driving pin in the frame the normal puncture test.

In contrast, the invention provides a remedy here. The contact between the stop and the counter stop shows that the drive pin has not yet broken. For if it were broken, its exterior would change Allow the section to be easily pulled out of the gear housing via the sleeve.

The puncture test also extends to the

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Driving pin itself, without being an essential part of the animal increased design effort would be required.

In a further development of this idea, the auxiliary drive is characterized in that the stop has radial projections carries and that the counter-stop is provided with an opening corresponding to the shape of the • stop, the Position of the projections and the angular position of the counter stop - prevent the stop from passing through if the inner toothing of the drive pin is aligned to engage with the corresponding toothing of the axle is. In this way, the drive pin can be removed without the need to dismantle the entire gearbox. Nevertheless, it is ensured that the stop and counter stop fulfill their function when the drive pin is pulled axially outwards * If you want to completely remove the driving pin, you give it after its internal teeth leave the axis has a rotation until the radial projections of the stop on the corresponding shape of the opening are aligned in the counter stop. The overall arrangement can be made so that a passage of the stop due to the counter-stop in none of the large number of angular positions of the driving pin is possible in which the driving pin with its internal toothing in

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the associated toothing of the axis can intervene.

If the auxiliary drive is designed in such a way that the sleeve is axially locked in the manner of a bayonet lock works, see above, the axial grooves extend outward in the shoulder belonging to the gearbox housing beyond the outer ring groove. The straight axial movement of the sleeve when pulling out the drive pin is therefore no longer limited on the sleeve side, but only through the contact between the stop and the counter stop.

The invention is explained below with reference to a preferred embodiment in connection with the enclosed Drawing explained in more detail. The drawing shows in:

1 shows an axial section through an auxiliary drive according to the invention in the position for normal operation;

FIG. 2 shows a section corresponding to FIG. 1, but in the position for testing operation; FIG.

Fig. 3 is a section along the line HI-III in Fig. 1;

Fig. 4 is an end view of the auxiliary drive, seen in the direction of arrow A of Figure 1, with the safety element attached;

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FIG. 5 is a view corresponding to FIG. 4 at halfway released locking element.

According to FIG. 1, the auxiliary drive is connected to a free-running axle 1 of a rail vehicle. As a rule, the connection is made via a wheel hub. The rotary movement of the axis 1 is transmitted to a driving pin 2 which, during normal operation, engages with an internal toothing 3 in a corresponding toothing of a component 4 connected to the axis. In the area of its outer end, the driving pin also has an outer toothing 5 * which, also during normal operation, engages in a corresponding toothing 'of a hollow shaft 6 belonging to a gear. The hollow shaft carries a worm wheel J ^from which
a unit (not shown), preferably a generator, is driven. The hollow shaft 6 is mounted in a gear housing 8.

The driving pin 2 is in turn connected via a fixed bearing with a sleeve 9, which in a to
Gear housing 8 belonging approach Io is guided displaceably in the axial direction. The sleeve 9 carries radial projections 11, and the approach Io is provided with annular grooves 12 and I ^. The annular grooves are connected to one another via axial grooves, one of which is an axial groove 14

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in the upper part of Fig. 1 rotated by 90 ° in interrupted Lines is shown. Furthermore, the sleeve carries 9 handle lugs I5, the easy moving of the Serve sleeve .. Also a pot 16 is provided with the interposition of seals 17 the approach Io of the housing and protects the interior of the mechanism against contamination.

If you want the auxiliary drive including the connected units when the rail vehicle is at a standstill manually check for functionality, the connection between axis 1 and the drive pin must be checked 2 are interrupted. For this purpose, the sleeve 9 is rotated using the handle lugs I5 such that the radial projections 11 of the sleeve are aligned with the associated axial grooves 14 of the shoulder Io. Then you can pull out the sleeve 9 including the drive pin so far that the inner teeth 3 of the Driving pin slides out of the associated toothing of the component 4 belonging to the axis 1.

At the same time, the outer toothing -5 of the driving pin 2 also leaves the corresponding toothing of the Hollow shaft 6 belonging to the gearbox 6. Instead of the outer toothing 5, a central toothing 18 engages, the next to the external toothing on the drive pin

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2 is arranged, 'in the toothing of the hollow shaft ο a. After reaching this position, the driving pin is ax-locked again in the axial direction, that is, the sleeve 9 is rotated in such a way that its projections 11 migrate into the dio h.iugnut Ij of the attachment Io.

The driving pin 2 carries on its outer ünde a pin I9, preferably in the form of a square, on which a hand crank is attached tenu. jJie Axial locking of the sleeve 9 prevents the driver pin from following when the handcurler is put on wanders back inside. The Driving pins are rotated, whereby he engages his middle "toothing Io in the toothing of the Hollow shaft 6 takes the worm wheel 7 and the connected Drives the unit for a functional test.

The position of the individual parts in the test position from Fig. 2.

The driving pin 2 has a pin 19 on its inner end, at the end of which a stop 2o is attached. Furthermore, a counter-stop 21 is firmly connected to the axis 1. If the driving pin 2. is pulled outwards in order to remove the auxiliary drive from the

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To transfer position into the test position ^{, the} stop 2o of the drive pin comes to rest on the counter-stop 21 at the moment in which the inner teeth j> and the outer teeth 5 of the drive pin have left their associated teeth. Since the axial grooves 14 in the shoulder Io belonging to the housing are extended outward beyond the outer annular groove 13 , the engagement between the stop 2o and the counter-stop 21 is the only obstacle to a complete extraction of the driving pin 2. This obstacle only occurs when the drive pin is intact. If it is broken, the operator will find no limit to the axial pull-out movement. As a result, a puncture test of the driving pin 2 is also included in the puncture test of the connected units.

The position of engagement between stop 2o and counter-stop 21 is also shown in FIG.

According to Pig. 5 , the counter-stop 21 in the present case has the shape of a plate, in the center of which an opening 22 is provided. Radial extensions 2j? at. The stop 2o has the same shape as the opening 22 with the radial

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Extensions 23, in such a way that he with sufficient Game can pass through the counter stop 21.

The stop 2o is in a predetermined orientation with respect to the inner toothing 3 of the driving pin arranged. The same applies with regard to the counter-stop 21, specifically in relation to the internal toothing 3 of the drive pin belonging toothing in Component 4. The orientation is chosen so that that the stop 2o is locked against passage through the counter-stop 21 when the internal toothing 3 of the driving pin 2 in the associated toothing engages or is aligned with a corresponding engagement. Stop and counter stop come So under all circumstances to intervene if the driver pin 2 is pulled axially outward. To completely dismantle the drive pin, you have to him give in the position shown in Fig. 2 with the hand crank such a rotation that the stop 2o on the opening 22 provided with the extensions 23 in the Counter stop 21 is aligned. The internal toothing 3 engages in the associated toothing then of course no longer possible.

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/ S

From the above it follows that the complete dismantling of the driving pin only .. · by a "little trick" is possible, i.e. by axially pulling out the sleeve 9 and actuating the drive pin using the hand crank with the sleeve unlocked. In this way it is prevented that the driving pin accidentally pulled out completely during normal operation by untrained operators will.

Instead of the shape of the stop 2o and the counter-stop shown in the present exemplary embodiment 21 other arrangements can also be used. For example, the counter stop can consist of a simple Radial projection exist, the stop in the form of a plate with a radial 'recess or also has the shape of a radial projection. All types of toothing are also possible.

In order to prevent the sleeve 9 from moving out of the axially locked normal position during operation, whereupon the Mitnehrnerbolzen 2 could automatically slide outwards, is an anti-rotation device provided for the sleeve 9. For this purpose, the sleeve 9 carries parallel, opposing key surfaces

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24, as best shown in FIG. The wrench flats are used to engage a safety egg again 25.

According to Fig. 4, the securing element 2 ^ a Opening 26 which fits over the sleeve 9. This opening is followed by an elongated hole 27, the parallel one of which Surfaces are adapted to the dimension of the key surfaces 24. When assembling the securing element 25 this is with the opening 26 placed over the sleeve 9 and then, in Fig. 4 to the right, shifted in such a way that the key surfaces 24 wander into the elongated hole 27. In the process, one arranged on the securing element 23 slides Projection 28 through a push-through opening 29 provided on the gear housing 8.

Fig. 4 shows the securing element 23 in the fully assembled state. In this position, an opening J) O in the projection 29 of the securing element has pushed itself over an associated opening provided in a part of the gear housing, so that a seal> 1 could be attached through the two superimposed openings.

J
To prevent the safety element 25

to prevent it, its projection ^ 8 carries a spring> 2,

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which spreads with one of its legs j? ^ behind the piercing opening 29, to such an extent that the leg 33 prevents a retraction movement of the securing element 25 when it is not pressed in.

If you want to remove the fuse element 25, so one must move the leg ^ of the spring j> 2 so far inwards press so that this leg can slide into the through-opening 29. A corresponding intermediate position is shown in FIG.

The securing element 25 is designed as a hand crank and thus serves at the same time to carry out the test process.

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Claims (11)

2320H8 claims 1. Auxiliary drive between an axis of a rail » vehicle and a unit that can be driven by this axis, with a gear unit upstream of the unit and with a driving pin arranged in the gear housing and toothed at both ends, which during normal operation Establishes a drive connection between the axle and the housing and for testing purposes at least as far axially is outwardly displaceable that it with its internal toothing from a corresponding toothing of the axis slides out, characterized in that that the driving pin (2) with its outer, a pin (I9) for attaching a hand crank The end is mounted in a sleeve (9) guided axially displaceably relative to the gear housing (8) and on the inside in addition to its outer toothing (5), a central toothing (18) for engaging in the transmission carries. 2. Auxiliary drive according to claim 1, characterized in that the sleeve (9) in its inner and in its outer position can be locked against axial displacement. - ²² 409844/0206 3. auxiliary drive according to claim. 2, characterized in that the sleeve (9) is rotatably guided and radial projections (11) in annular grooves (12, 15), which their position according to the end positions of Sleeve (9), as well as in axial grooves (14) that connect the annular grooves, one to the gear housing (8) belonging approach (lo) can slide. 4. auxiliary drive according to one of claims 1 to 3, characterized in that the sleeve (4) is provided with handle lugs (I5). 5. Auxiliary drive according to one of claims 1 to 4, characterized in that the sleeve (9) carries a pot (16) which crosses the approach (lo) with the interposition of seals (17). 6. Auxiliary drive according to one of claims 1 to 5> characterized in that the sleeve (9) is provided with an anti-twist device. 7. auxiliary drive according to claim 6, characterized in that that the sleeve (9) at the outer end has two parallel, flat, arranged as secants to the circumferential surface Wrench surfaces (24) for engaging a securing element (25), which is connected to a sleeve (9) - 23 - 4098 A /// 0 20 6 ^ 2320H8 matching opening (26) and with one on the opening subsequent longitudinal hole (27) for engagement in the key surfaces is provided as well as one in a push-through opening (29) on the gear housing (8) carries matching projection (28). 8. Auxiliary drive according to claim 7, characterized in that the projection (28) is provided with a hole (30) which, when the security element (25) is correctly placed, comes to rest via a gear housing (8) provided hole for jointly receiving a seal « 9. Auxiliary drive according to claim 7 or 8, characterized in that the projection (28) carries a spring (32) which extends with at least one rearward leg (33) after the securing element (25) has been placed over the width of the through-hole -Opening (29) spreads out. 10. Auxiliary drive according to one of claims 7 öis 9 *, characterized in that the securing element (25) is designed as a hand crank. 11. Auxiliary drive according to one of claims 1 to Io, - 24 - .40984 4/0206 2320U8- characterized in that the Mitnehnierbolzen (2) at its inner end has a stop (2o) which, after pulling out the inner toothing (2) of the Mitnehmen rboi ζ en (2) from the corresponding toothing the axis (1) comes to rest on a counter-stop (21) attached to the axis. 12, auxiliary drive according to claim 1, characterized in that the stop (2o) has radial projections and that the counter-stop (21) is provided with an opening (22, 2j>) corresponding to the shape of the stop, the position of the projections and the Angular position of the counter-stop prevent the stop from passing through if the inner toothing 0) of the driving pin (2) is aligned to engage the corresponding toothing of the axis (1). IjJ. Auxiliary drive according to Claim 11 or 12 in conjunction with claim 2, characterized in that that the axial grooves (14) in the extension (Io) belonging to the gear housing (8) extend outwards over the outer Extend the annular groove (1J5). 4098 4 4/0206 Blank page