DE19504451B4 - Drive device for mobile working devices - Google Patents

Abstract

driving means for mobile tools, especially for Rüttelwalzen vehicles, forklifts or the like, with a hydraulic motor (1), in particular with a Radial piston multi-stroke hydraulic motor, wherein the hydraulic motor (1) on several housing parts (5, 6) composite housing, a rotor-piston group (8) and a drive shaft (4), with the part to be driven, e.g. a Rüttelwalze or a drive wheel of the implement, over a Shaft flange (14; 52, 53) is connectable, with an intermediate the rotor-piston group (8) and the shaft flange (14; 52, 53) located storage (3) for the Drive shaft (4) and with a hydraulically actuated multi-disc brake (2), characterized in that the multi-disc brake (2) radially outward the storage (3) fixed to the housing is arranged and the bearing (3) at least partially covered axially, wherein the shaft flange (14; 52, 53) forms part of the multi-disc brake (2) is and radially outside a broadening (28, broadening of 53) with a driver toothing (29; 56) for having the inner disc discs (19) and being fixed to a housing Cover part (18, 55) the axial ....

Description

The The invention relates to a drive device for mobile work equipment according to the preamble of claim 1.

A drive device according to the preamble of claim 1 is made DE 28 31 458 C2 known.

There are a variety of drive devices for mobile equipment known. They usually have a hydraulic motor 1 (see the 3 and 4 ) and can with a drum brake or a dry or in oil running multi-disc brake 2 (see. 5 ). Here is the drum brake (see 7 ) in the conventional drive devices usually arranged on the output side, while the multi-disc brake (see 5 ) is mounted on the opposite side of the output on the hydraulic motor. From the arrangement of the multi-disc brake but inevitably results in a larger axial length of the drive device.

Such drive devices are used, for example, in vibratory roller vehicles, as used for compacting and smoothing soil, asphalt, gravel, gravel and the like. Since the drive of a Rüttelwalze can only be arranged laterally, it follows from the axial length that the Rüttelwalzen vehicle must comply with a correspondingly large distance to high curbs or boundaries to avoid collision. Another disadvantage is that the multi-disc brake protrudes laterally beyond the Rüttelwalzen vehicle, since the vehicle frame at the connecting flange of the hydraulic motor (see 5 ) is attached. However, a projection beyond the vehicle frame is problematic for safety reasons and should be avoided.

Further applications find this drive equipment eg for a forklift. Here are usually two centrally located under the vehicle hydraulic motors (see 7 ), of which a two-part drive shaft leads to the outside to the drive wheels of the forklift. There, the chassis of the forklift is also attached to the vehicle frame. It follows that the drive wheel and the hydraulic motor are arranged on opposite sides of the vehicle frame.

From the publication DE 42 06 086 A1 is a modular drive system, which optionally provides an electric motor or a hydraulic motor as the drive system and optionally a hub or shaft output as the output system. A brake disc or a multi-disc brake is used to switch the planetary gear provided as an output stage, wherein the drive shaft can continue to rotate relative to the output shaft (hub) when the brake is actuated.

Since the multi-disc brake is arranged in the conventional drive means but on the opposite side of the output of the hydraulic motor, it is located centrally under the vehicle and within the vehicle frame. This has the major disadvantage that for repairs and maintenance purposes each of the entire drive area must be dismantled. Therefore, in this case, contrary to the wishes of some customers usually only drum brakes are used, the abutreibsseitig as in the 7 are shown attached to the drive wheels.

Of the The invention is therefore based on the object, a drive device for mobile implements to create a good at a low axial extent accessibility for maintenance allowed.

These The object is solved by the features of claim 1.

Covered according to the invention the multi-disc brake the bearing at least partially axially. Through this Arrangement of the multi-disc brake is an existing, previously idle Free space between the hydraulic motor and the shaft flange of the drive shaft used. This results in the advantage that the axial length of the Drive device significantly shortened.

In order to is it possible with vibrating roller vehicles closer to high curbs and boundaries, such as Walls, etc., to approach. Of the to be compacted or smoothed Underground can thus be better edited. Furthermore, a disturbing supernatant of the drive area via the vehicle frame avoided.

These Arrangement also allows further easy access for maintenance since for disassembly of the multi-disc brake only the drive to be driven Part, e.g. the vibrating roller of the implement, must be disconnected.

In the application of the forklift results from this arrangement that the multi-disc brake according to the invention can be arranged on the output side namely at the wheels. This ensures that they are deducted after disassembly of a part of the two-piece drive shaft who can, without the drive must also be dismantled. The maintenance and repair costs for the multi-disc brake thus reduced significantly.

With the solid connection of a component of the multi-disc brake with The shaft flange can achieve a simple, compact construction of the drive device become. With only a few components, the available space becomes optimal exploited, and the multi-disc brake can be effective at a favorable circumferential position with less stress on the brake assembly directly on the Apply output flange or shaft flange.

By a one-piece Forming a component of the multi-disc brake with the shaft flange can saved another component and the drive device be made even more compact and simpler. The effect of the multi-disc brake can be transferred directly to the drive.

The radially outside Broadening of the shaft flange and the formation of a driver toothing for the drive-side plate discs makes it possible to obtain a sufficient Number of lamellar discs form-fitting on the shaft flange to arrange. The braking effect can be so optimize and ensure.

The Formation of the drive device with a cover part, the axial removable attachable to another housing half is possible a simple disassembly of the multi-disc brake for maintenance or repair purposes.

advantageous Further developments are the subject of the dependent claims.

A Arrangement of the multi-disc brake behind the shaft flange allows one compact design of the drive device at one time low radial extent. The one behind the shaft flange Free space is used so meaningfully, and it can be a cheap Measure Ground clearance for the mobile work tool be achieved.

By the formation of a sealing surface the widening of the shaft flange for a in a first half of the housing Lamella brake recorded seal, the brake chamber can be sealed against external influences become. The ingress of dirt, liquids, etc. can so to be effectively prevented. On the other hand, an expres- sion of oil when using one in oil running multi-disc brake avoided.

Thereby, that the additional housing half component of the hydraulic motor housing is, the construction becomes more compact and the number of components the drive device continues to decrease.

By the formation of chambers for receiving return springs of the multi-disc brake in the other half of the case, will a guided pressurization ensured on the multi-disc brake. Furthermore, unused space the hydromotor in favor of a compact embodiment used meaningfully.

Thereby, that the Hydraulic piston arrangement of the multi-disc brake with the pressure chamber arranged substantially axially aligned with the disk discs is, can be an effective pressurization on the slats be achieved with small dimensions. The hydraulic piston assembly according to the invention has only one slight radial expansion over the slat disks out on. The radial extent of the drive device can thus be kept low and the ground clearance of the mobile work tool will not be further restricted.

There an operating section the hydraulic piston assembly sealed by a separation extending into the pressure chamber, the force of the return spring arrangement be effectively applied to the slats without fluids or foreign bodies into the pressure chamber or out of the pressure chamber can get out.

By the formation of the hydraulic piston assembly in the form of an annular disc, in even circumferential distance to each other carries a plurality of adjusting pins, which are characterized by corresponding Extend recesses of the partition, the hydraulic piston assembly can safely guided and the pressure force of the return spring arrangement be effectively applied to the lamellae. Another Advantage of this arrangement is that the separation of a Piece can exist.

The Forming the hydraulic piston assembly as an annular disc, the wearing a collar that sealed by a two-part separation therethrough extends, allows a uniform pressurization by the return spring arrangement. The braking effect is optimized because the brake pressure on a closed annular surface the slat disks comes into effect.

Thereby, that the Separation has the shape of an annular disc, results in a simple construction of the hydraulic piston assembly, at the same time a good disassembly of the arrangement.

By doing the separation has an outer diameter did not have that the outside diameter of the Hydraulic piston assembly protrudes, it is possible the multi-disc brake from the housing the hydraulic motor for Repairs, maintenance work, etc. deduct.

The Invention will be described below in embodiments with reference to FIG Drawing closer explained. It shows:

1 a full section of a drive device according to the invention when used in particular for a Rüttelwalzen vehicle;

2 the upper half of a schematic full section through a drive device according to the invention when used for example for a forklift;

3 a cross section through a hydraulic motor;

4 a full section through a hydraulic motor with drive shaft and bearing along the line II in the 3 ;

5 a side view of a conventional drive means such as a Rüttelwalzen vehicle with an axially outwardly extending multi-disc brake and the indicated attachment to the frame;

6 a plan view of a conventional drive device according to 5 ;

7 a side view of a conventional drive means such as a forklift with each having a driven side arranged drum brake and the indicated attachment to the frame;

8th a plan view of a conventional drive device according to 7 ,

First, will the invention with reference to an embodiment explains the e.g. in vibratory rollers vehicles Application finds.

The drive device has a hydraulic motor 1 , a hydraulic multi-disc brake 2 and a warehouse 3 for a drive shaft 4 on.

The hydraulic motor 1 is designed as a radial piston multi-stroke hydraulic motor and consists of two housing parts 5 and 6 and one in a lifting ring 7 housed rotor-piston group 8th that in detail in 3 is shown. This consists of a rotor disk 9 and radially outwardly directed pistons 10 , The rotor disk 9 is through a gearing 11 with the drive shaft 4 connected. The pistons 10 are radial in the rotor disk 9 arranged and supported by rollers 12 on the curved path 13 of the cam ring 7 from.

The with the rotor disk 9 toothed drive shaft 4 is about the camp 3 supported and has a shaft flange or flange portion 14 on.

The flange section 14 the drive shaft 4 is with fastening threads 17 provided for a vibrating roller, not shown.

The warehouse 3 consists of two tapered roller bearings according to conventional drive equipment 15 and 16 in the second housing part 6 the hydraulic motor 1 are housed.

The multi-disc brake 2 is arranged according to the invention such that it is the bearing 3 at least partially covered axially. It is located in the area between the flange section 14 the drive shaft 4 and the second housing part 6 the hydraulic motor 1 and thus uses the fallow space there. Thus, it does not contribute to the axial length of the drive device.

It has a lid part 18 , inner and outer discs 19 and 20 , a hydraulic piston assembly 21 and a connection 22 for a pressurized fluid. The hydraulic piston assembly 21 consists of an annular disk 23 that has a collar 24 carries, as well as a two-part separation 25 , The collar 24 protrudes through the separation 25 in a brake room 26 in which are the inner and outer disc discs 19 and 20 are located. The hydraulic piston assembly 21 is through a in the second housing part 6 the hydraulic motor 1 accommodated return spring arrangement 27 biased.

The ring disk 23 the hydraulic piston assembly 21 can instead of the adjusting ring 24 also carry a number of setting pins that are on a common radius on the annular disc 23 are arranged. These then protrude through holes in the now one-piece separation 25 in the brake room 26 ,

The inner, drive-side disk discs 19 are on a radially outward broadening 28 of the flange portion 14 arranged, wherein a driving toothing 29 for a positive connection to the inner disc discs 19 provides. Further, outer discs 20 alternating to the widening 28 of the flange portion 14 arranged inner disc discs 19 are arranged, are located on a driver toothing 30 on the inside of the De ckelteils 18 the multi-disc brake 2 , These are there form-fitting with the cover part 18 connected and fixed in operation unlike those on the widening 28 of the flange portion 14 the drive shaft 4 arranged lamellae 19 ,

In operation, the pistons 10 the rotor-piston group 8th controlled by a pressurized fluid such that the rotor disk 9 is caused to rotate. The direction of rotation is selected by the control mode. The pistons 10 are thereby pushed outwards and are supported by the rollers 12 on the curved path 13 of the cam ring 7 from (see 3 ). About the gearing 11 the rotor disk 9 the rotational movement is on the drive shaft 4 transfer. This is supported by the tapered roller bearings 15 and 16 of the camp 3 from. A vibrating roller, not shown here, via the fastening thread 17 with the flange section 14 the drive shaft 4 is thus connected, is thus driven and rotated.

The multi-disc brake 2 is in the operating state via the connection 22 and a pressure chamber 31 pressurized with pressurized fluid. The applied pressure causes the annular disc to slide back 23 the hydraulic piston assembly 21 against the clamping force of the return spring arrangement 27 , Thus, the brake is released and in the event of a malfunction or a sudden pressure drop in the system, the drive means is automatically braked by the hydraulic piston assembly 21 by the biasing force of the return spring arrangement 27 against the inner and outer discs 19 and 20 suppressed. The outside of the lid part 18 attached outer disc discs 20 and those in on the broadening 28 of the flange portion 14 arranged inner disc discs 19 are pressed against each other and brake by the friction on their surfaces the vehicle. To release the multi-disc brake 2 becomes the hydraulic piston assembly 21 again pressurized fluid.

The pressure chamber 31 the hydraulic piston assembly 21 is sealed to the outside, so that no pressure fluid in the brake chamber 26 in which are the lamellar discs 19 and 20 can escape. Furthermore, the brake room 26 opposite the flange portion 14 the drive shaft 4 sealed to prevent ingress of dirt particles. The multi-disc brake 2 can run dry or in oil, whereby the seals prevent leakage of oil. Furthermore, the tapered roller bearings 15 and 16 sealed to the surrounding areas to prevent damage from contamination.

The housing parts 5 and 6 and the lifting ring 7 are connected in this embodiment denoted by a screwed together. The lid part 18 the multi-disc brake 2 is sealed on the second housing part 6 the hydraulic motor 1 attached.

The inventive design of the multi-disc brake 2 allows easy disassembly for maintenance. For this purpose, the drive device must be solved only by the vibrating roller, not shown here and then the lid part 18 be deducted on the output side. This is made possible by the fact that neither the separation 25 still the ring disk 23 a larger diameter aufwei sen, as the connecting portion of the lid part 18 to the second housing part 6 the hydraulic motor 1 ,

The drive device according to the invention made possible by the axially the bearing 3 overlapping multi-disc brake 2 a compact design with a good accessibility for maintenance. The axial length of the first embodiment of a Rüttelwalzen vehicle can be shortened in this way from 301 mm to 190 mm, which a closer approach to high curbs and boundaries is made possible. Also a projection on a vehicle frame 33 the Rüttelwalzen vehicle can be avoided hereby. At the same time, the ground clearance of the vehicle is not restricted. The disassembly effort for maintenance is kept low and the drive device has a simple construction, with standard parts of the conventional drive means can continue to be used on a large scale.

In the following the invention will be described with reference to the second embodiment 2 as it is used, for example, in forklifts.

The drive device here has a hydraulic motor, not shown 1 , a drive shaft driven thereby 50 with an already known bearing 3 and one in this embodiment separated from the hydraulic motor, on the other side of a frame 51 provided disc brake 2 on.

On a flange section 52 the drive shaft 50 is a connection part 53 attached to which an unillustrated drive wheel of a working device is arranged. This connection part 53 make the anvil into one with the frame 51 connected, fixed pipe 54 dar. The tapered roller bearings 15 and 16 of the camp 3 are between the fixed pipe 54 and the connector 53 arranged.

The multi-disc brake 2 again consists of a lid part 55 , the inner and outer flap wheels 19 and 20 , the hydraulic piston assembly 21 and the connection 22 for a pressurized fluid. The drive side, inner disc discs 19 are in this embodiment via a on the connector 53 arranged toothing 56 positive fit with the connection part 53 connected. The outer disc discs 20 are in turn on a driver toothing 57 on the inside of the lid part 55 and are in contrast to the inner disc discs 19 fixedly arranged.

The structure and operation of the hydraulic motor 1 and the hydraulic piston assembly 21 the multi-disc brake 2 correspond to the previous example.

The multi-disc brake 2 In addition, in turn does not contribute to the axial length of the drive device, since they are the bearing 3 partially covered. Due to the output side arrangement of the multi-disc brake 2 Furthermore, easy access, eg for maintenance, is possible.

For disassembly, the split in the middle of the vehicle drive shaft 50 removed on the output side to the outside. Also the multi-disc brake 2 then leaves the outside of the frame 51 pull off. This is possible because the hydraulic piston assembly 21 as well as the separation 25 have no larger diameter than the Verbindungsab section of the lid part 55 the multi-disc brake 2 to the frame 51 ,

Thus, the access to the multi-disc brake 2 in a simple way possible. In conventional drive systems, in which the multi-disc brake 2 within the frame 51 in the area of the hydraulic motor 1 was arranged, dismantling, however, designed much more complex, since the entire drive area had to be removed.

In the 3 to 8th Known constructions of drive devices and brakes are shown in which comparable components with the in 1 and 2 used reference numerals are provided.

The Invention thus provides a drive device for mobile tools, in which the multi-disc brake in the region of the bearing for the drive shaft is arranged. This is a reduction in the axial length of the Drive device possible and the maintenance can be kept low.

As will be apparent from the illustrated embodiments, the invention may be subject to a number of application specific modifications. A different design of the housing parts and the system connections will be necessary depending on the use. Further, for example, the hydraulic piston assembly 21 be formed integrally, instead of the screwing of the annular disc shown here 23 and the operating section 24 ,

Claims (11)

Drive device for mobile equipment, in particular for Rüttelwalzen vehicles, forklifts or the like, with a hydraulic motor ( 1 ), in particular with a radial piston multi-stroke hydraulic motor, wherein the hydraulic motor ( 1 ) one of several housing parts ( 5 . 6 ) assembled housing, a rotor-piston group ( 8th ) and a drive shaft ( 4 ), with the driven part, such as a Rüttelwalze or a drive wheel of the implement, via a shaft flange ( 14 ; 52 . 53 ) is connectable, with one between the rotor-piston group ( 8th ) and the shaft flange ( 14 ; 52 . 53 ) ( 3 ) for the drive shaft ( 4 ) and with a hydraulically actuated multi-disc brake ( 2 ), characterized in that the multi-disc brake ( 2 ) radially outside the bearing ( 3 ) is fixed to the housing and the storage ( 3 ) at least partially covered axially, wherein the shaft flange ( 14 ; 52 . 53 ) a component of the multi-disc brake ( 2 ) and radially outwardly a broadening ( 28 ; Widening of 53 ) with a driver toothing ( 29 ; 56 ) for the inner disc discs ( 19 ) and wherein on a housing-fixed cover part ( 18 . 55 ) that axially. removable on one half of the housing ( 6 ; 51 ) is fastened, a driver toothing ( 30 ; 57 ) for the outer disc ( 20 ) is provided. Drive device according to claim 1, characterized in that the multi-disc brake ( 2 ) behind the shaft flange ( 14 ) lies. Drive device according to claim 1 or 2, characterized in that the broadening of the shaft flange ( 28 ) a sealing surface for a in a first housing half ( 18 ) the multi-disc brake ( 2 ) received seal ( 32 ) trains. Drive device according to claim 1, characterized in that the housing half ( 6 ) Part of the housing of the hydraulic motor ( 1 ). Drive device according to claim 1 or 4, characterized in that the housing half ( 6 ) Chambers for receiving return springs ( 27 ) the multi-disc brake ( 2 ) trains. Drive device according to one of claims 1 to 5, with a against the force of a return spring arrangement ( 27 ) working multi-disc brake ( 2 ), whose disk slices ( 19 . 20 ) by the return spring arrangement ( 27 ) pressed against each other and by means of a hydraulic piston arrangement ( 21 ) can be brought out of operation by a pressure chamber ( 31 ) is pressurized with pressurized fluid and wherein the pressure chamber ( 31 ) of the hydraulic piston assembly ( 21 ) axially aligned with the disk slices ( 19 . 20 ) is arranged. Drive device according to claim 6, characterized in that that of the return spring arrangement ( 27 ) acted upon hydraulic piston assembly ( 21 ) with an actuating portion ( 24 ) sealed by a separation ( 25 ) extending through the pressure chamber ( 31 ) limited. Drive device according to claim 7, characterized in that the hydraulic piston arrangement ( 21 ) of an annular disc ( 23 ) is formed, which at a uniform circumferential distance from each other a plurality of adjusting pins ( 24 ), which extends through corresponding recesses of the separation ( 25 ) extend therethrough. Drive device according to claim 8, characterized in that the hydraulic piston arrangement ( 21 ) of an annular disc ( 23 ) is formed, which has a collar ( 24 ), which is sealed by a two-part separation ( 25 ) extends therethrough. Drive device according to one of claims 7 to 9, characterized in that the separation ( 25 ) Has annular disk shape. Drive device according to one of claims 7 to 10, characterized in that the separation ( 25 ) has an outer diameter that does not exceed the outer diameter of the hydraulic piston assembly ( 21 protrudes).