DE19504451A1 - Drive for mobile working machine with hydraulic motor - Google Patents

Abstract

The drive is intended for compacting rollers, forklift trucks etc. and its hydraulic motor (1) is pref. of the radial piston, multi-stroke type. The assembly includes a multi-disc brake (2) and a bearing (3) for a drive shaft (4), coupled to the driven part of the machine, such as the compacting roller, on the drive wheel. The multi-disc brake assembly at least partly covers the drive shaft bearing. Pref. The drive shaft is coupled to the driven component via a flange (14) screwed to a component of the multi-disc brake.

Description

The invention relates to a drive device for mo bile tools, such as B. Vibratory roller vehicles, fork stacker and the like., With a hydraulic motor, in particular one Radial piston multi-stroke hydraulic motor, a hydraulic lamella lenbremse and a bearing for a drive shaft that with the part to be driven, such as. B. the vibrating roller or Drive wheel of the implement is connected.

A variety of drive devices for mo bile tools are known. They generally have a hydraulic motor 1 (see FIGS. 3 and 4) and can be equipped with a drum brake or a multi-disc brake 2 running dry or in oil (see FIG. 5). Here, the drum brake (see FIG. 7) in the conventional drive devices is generally arranged on the output side, while the multi-disc brake (see FIG. 5) is attached to the hydraulic motor on the side opposite the output. From the arrangement of the multi-disc brake inevitably results in a greater axial length of the drive device.

Such drive devices are used for. B. in vibratory roller vehicles, such as those used for compacting and smoothing soil, asphalt, gravel, gravel and the like. Since the drive of a vibrating roller can only be arranged laterally, it follows from its axial length that the vibrating roller vehicle must maintain a correspondingly large distance from high curbs or boundaries in order to avoid a collision. Another disadvantage is that the multi-disc brake protrudes laterally beyond the vibrating roller vehicle, since the vehicle frame is attached to the connection flange of the hydraulic motor (see FIG. 5). A protrusion beyond the vehicle frame is problematic for safety reasons and should be avoided.

These drive devices can be used for other applications. B. for a forklift. As a rule, two hydraulic motors (see Fig. 7) arranged centrally under the vehicle are used here, of which a two-part drive shaft leads outwards to the drive wheels of the forklift. There the chassis of the forklift truck 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.

Since the multi-disc brake is arranged in the conventional Antriebsein directions but on the opposite side of the output of the hydraulic motor, it is located in the middle under the vehicle and within the Fahrzeugrah mens. This has the major disadvantage that for repairs and maintenance purposes the entire Antriebsbe must be dismantled rich. For this reason, contrary to the wishes of some customers, only drum brakes are used in this application case, which are attached to the drive wheels on the output side as shown in FIG. 7.

The invention is therefore based on the object To create a drive device for mobile work equipment, which is easy to access with a small axial expansion Maintenance work allowed.

This object is achieved in that the multi-disc brake axially at least partially supports the bearing covered.

This arrangement of the multi-disc brake is a be standing, previously unused space between the Hy  dromotor and the shaft flange of the drive shaft. This has the advantage that the axial construction length of the drive device significantly reduced.

This makes it possible with vibrating roller vehicles closer to high curbs and borders, such as B. Walls and the like to drive up. The one to be compressed or to smoothing surface can be processed better. Furthermore, a disruptive projection of the drive area avoided beyond the vehicle frame.

This arrangement also allows one to continue Easy access for maintenance work, because to dismantle the Multi-disc brake only the drive of the one to be driven Part, e.g. B. the vibrating roller of the implement, separately must become.

When using the forklift, it follows from this arrangement that the multi-disc brake according to the invention arranged on the driven side namely at the wheels can be. This ensures that according to De assembly of a part of the two-part drive shaft removed conditions can be removed without disassembling the drive must become. The maintenance and repair work for the La The mellar brake is therefore significantly reduced.

With the fixed connection of a component of the lamella Lenbrake with the shaft flange can be a simple, compact ter structure of the drive device can be achieved. With we some of the components, the available space is optimally selected uses, and the multi-disc brake can its effect on a favorable circumferential location with less stress on the Brake arrangement directly on the output flange or Wel Apply the lenflange.

An arrangement of the multi-disc brake behind the waves flange enables a compact construction of the drive units  direction with a small radial expansion at the same time nung. The free space behind the shaft flange becomes used so sensibly, and it can have a favorable level of Bo freedom for the mobile work device can be achieved.

Through a one-piece formation of a component the multi-disc brake with the shaft flange can be another Component saved and the drive device still kom be made more compact and easier. The effect of La This means that the brake can be transferred directly to the drive the.

The radial flaring of the shaft flange and the formation of driver teeth for the drive-side lamella discs allows one out sufficient number of lamella discs on the To arrange shaft flange. The braking effect can be op Timing and ensuring.

By forming a sealing surface on the ver widening of the shaft flange for one in a first Ge half of the multi-disc brake housed seal, can the brake chamber is sealed against external influences will. The ingress of dirt, liquids, etc. can effectively prevented on the one hand. On the other hand becomes an oil leak when used in oil Avoided multi-disc brake.

The formation of the drive device with a Cover part that is axially removable on another housing half can be attached, enables easy disassembly the multi-disc brake for maintenance and repair purposes.

Characterized in that the further housing part of the Hydromotor housing is, the design is more compact and the Number of components of the drive device reduced yourself further.  

Through the formation of chambers for receiving back springs of the multi-disc brake in the further housing half, a guided pressurization on the La mellar brake ensured. Furthermore, there is unused space of the hydraulic motor in favor of a compact embodiment used sensibly.

The fact that the hydraulic piston assembly of the lamella lenbremse with the pressure chamber essentially axially curse tend to be arranged with the lamella discs, one effective pressure on the slats at ge ring dimensions can be achieved. The hydraulic pistons Order has only a small radial Aus according to the invention expansion beyond the lamellar discs. The radial one Expansion of the drive device can thus be kept low be and the ground clearance of the mobile implement is not further restricted.

Because there is an operating section of the hydraulic piston arrangement sealed by a separation in the pressure Chamber extends into it, the force of the return spring arrangement effectively applied to the lamellar discs without fluids or foreign objects in the pressure chamber can get in or out of the pressure chamber.

By designing the hydraulic piston assembly in Form an annular disc that is evenly spaced to each other carries several trunnions, which are ent speak speaking recesses of the partition extend through the hydraulic piston assembly can be safely guided and the Pressure force of the return spring arrangement effectively on the Lamellar discs are applied. Another advantage this arrangement is that the separation from egg can consist of one piece.  

The formation of the hydraulic piston assembly as one Washer, which carries a collar that seals itself tet through a two-part partition extends, allows an even pressurization through the return spring arrangement. The braking effect is optimized because the brake pressure on a closed Annular surface of the lamellar discs comes into effect.

The fact that the separation is in the form of an annular disc has a simple construction of the hydraulic Piston arrangement, at the same time easy to disassemble arrangement.

In that the partition has an outer diameter that not over the outside diameter of the hydraulic piston assembly protruding, it is possible to remove the multi-disc brake from Housing of the hydraulic motor for repairs, maintenance work etc. deduct.

The invention is described below in exemplary embodiments explained in more detail with reference to the drawing. It shows:

Figure 1 is a full section of a drive device according to the invention when used in particular for a vibrating roller vehicle.

Fig. 2 shows the upper half of a schematic full section through a drive device according to the invention when using z. B. for a forklift;

Fig. 3 is a cross section through a hydraulic motor;

Figure 4 is a full section through a hydraulic motor with drive shaft and bearing along the line II in Fig. 3.

Fig. 5 is a side view of a conventional Antriebsein direction z. B. for a vibrating roller vehicle with egg ner axially extending outward slat brake and the indicated attachment to the frame;

Fig. 6 is a plan view of a conventional Antriebsein direction of FIG. 5;

Fig. 7 is a side view of a conventional Antriebsein direction z. B. for a forklift, each with egg ner arranged on the output drum brake and the indicated attachment to the frame;

Fig. 8 is a plan view of a conventional Antriebsein direction of FIG. 7.

First, the invention is based on an embodiment example explains that z. B. in vibratory roller vehicles Application.

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

The hydraulic motor 1 is designed as a radial piston multi-stroke hydromo tor and consists of two housing parts 5 and 6 and a rotor-piston group 8 accommodated in a lifting ring 7 , which is shown in detail in FIG. 3. This consists of a rotor disk 9 and pistons 10 directed outward in a star shape. The rotor disk 9 is connected to the drive shaft 4 by a toothing 11 . The pistons 10 are arranged radially in the rotor disk 9 and are supported on the cam track 13 of the cam ring 7 via rollers 12 .

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

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

The bearing 3 consists according to conventional drive devices from two tapered roller bearings 15 and 16 , which are placed in the second housing part 6 of the hydraulic motor 1 under.

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

It has a cover part 18 , inner and outer lamellae lens disks 19 and 20 , a hydraulic piston arrangement 21 and a connection 22 for a pressure fluid. The hydraulic lik piston assembly 21 consists of an annular disc 23 which carries an adjusting ring 24 , and a two-part separation 25 . The collar 24 protrudes from the separation 25 into a brake chamber 26 in which the inner and outer disk discs 19 and 20 are located. The hydraulic piston assembly 21 is biased by a housing part 6 of the hydraulic motor 1 housed in the second position Rückstellfe deranordnung 27 biased.

The annular disk 23 of the hydraulic piston arrangement 21 can also carry a number of adjusting pins instead of the adjusting ring 24 , which are arranged on the annular disk 23 on a common radius. These then protrude through holes in the now one-piece partition 25 in the brake senraum 26th

The inner, drive-side lamellar disks 19 are arranged on a radially outer widening 28 of the flange section 14 , with driver teeth 29 ensuring a positive connection to the inner lamellar lens disks 19 . Further, outer disc 20 , which are arranged alternately to the arranged on the widening 28 of the flange section 14 inner disc 19 , are located on a driving toothing 30 on the inside of the cover part 18 of the disc brake 2 . These are there positively connected to the cover part 18 and fixed in operation in contrast to the widening 28 of the flange portion 14 of the drive shaft 4 arranged on lamella disks 19th

In operation, the pistons 10 of the rotor-piston group 8 are controlled by means of a pressure fluid in such a way that the rotor disk 9 is caused to rotate. The direction of rotation is selected by the control method. The pistons 10 are thereby pressed outwards and are supported on the cam track 13 of the cam ring 7 via the rollers 12 (see FIG. 3). Via the toothing 11 of the rotor disc 9 , the rotary movement is transmitted to the drive shaft 4 . This is based on the tapered roller bearings 15 and 16 of the bearing 3 . A vibrating roller, not shown here, which is connected to the flange section 14 of the drive shaft 4 via the fastening thread 17 , is thus driven and set in rotation.

The multi-disc brake 2 is struck in the operating state via the connection 22 and a pressure chamber 31 with pressurized fluid. The applied pressure causes the ring disk 23 of the hydraulic piston arrangement 21 to slide back against the tension force of the return spring arrangement 27 . Thus, the brake is released and in the event of a malfunction or a sudden drop in pressure in the system, the Antriebsein direction is automatically braked by the hydraulic piston assembly 21 by the biasing force of the Rückstellfederan arrangement 27 presses against the inner and outer disk plates 19 and 20 . The outside of the cover part 18 attached outer disk 20 and the inside on the widening 28 of the flange portion 14 arranged inner La disk 19 are pressed against each other and brake the vehicle due to the friction on their surfaces. To release the multi-disk brake 2 , the hydraulic piston arrangement 21 is again pressurized with fluid.

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

The housing parts 5 and 6 and the cam ring 7 are connected in the water-tight embodiment with a screw connection. The cover part 18 of the multi-disc brake 2 is sealed on the second housing part 6 of the Hy dromotors 1 attached.

The design of the multi-disk brake 2 according to the invention enables simple dismantling for maintenance work. For this purpose, the drive device only has to be released from the vibrating roller, not shown here, and then the cover part 18 can be removed on the output side. This is made possible by the fact that neither the partition 25 nor the washer 23 have a larger diameter than the connecting section of the cover part 18 to the second housing part 6 of the hydraulic motor 1 .

The drive device according to the invention enables through the axially the bearing 3 overlapping multi-disc brake 2 a compact structure with a good grip at the same time for maintenance work. The axial length of the first embodiment of a vibrating roller vehicle can be shortened in this way from 301 mm to 190 mm, which enables closer approach to high curbs and boundaries. A protrusion beyond a vehicle frame 33 of the vibrating roller vehicle can also be avoided in this way. At the same time, the freedom of the vehicle from the floor is not restricted. The disassembly effort for maintenance work is kept low and the drive device has a simple construction, whereby standard parts of the conventional drive devices can still be used to a large extent.

In the following the invention is based on a second Embodiment as z. B. Forklift applications found, described.

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

On a flange portion 52 of the drive shaft 50 , a connecting part 53 is attached, on which a drive wheel, not shown, of an implement is arranged. This connector 53 is the counter bearing to a fixed to the frame 51 , fixed tube 54. The Ke gel roller bearings 15 and 16 of the bearing 3 are net angeord between the fixed tube 54 and the connector 53 .

The multi-disc brake 2 in turn consists of a cover part 55 , the inner and outer disc 19 and 20 , the hydraulic piston assembly 21 and the connection 22 for a pressure fluid. The drive-side inner flap discs 19 are connected in this embodiment via an disposed on the connection part 53 teeth 56 positively connected to the connecting part 53rd The outer lamellar disks 20 are in turn on a slave toothing 57 on the inside of the cover part 55 and, in contrast to the inner lamellar disks 19, are arranged in a fixed manner.

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

The multi-disc brake 2 also does not contribute to the axial overall length of the drive device, since it partially covers the bearing 3 . Due to the output side arrangement of the multi-disc brake 2 is also an easy ter access, for. B. for maintenance work, possible.

For disassembly, the drive shaft 50 , which is divided into two in the middle of the vehicle, is pulled outward on the output side. The multi-disc brake 2 can then also be pulled outward from the frame 51 . This is possible since the hydraulic piston arrangement 21 and the partition 25 have no larger diameter than the connecting section of the cover part 55 of the multi-disk brake 2 to the frame 51 .

Access to the multi-disk brake 2 is thus possible in a simple manner. In conventional Antriebseinrichtun gene in which the multi-disk brake 2 was located within the frame 51 in the region of the hydraulic motor 1, a dismounting on the other hand designed substantially more complicated, since the entire drive region had to be removed.

In FIGS. 3 to 8 known constructions of drive means and brake are shown, in which ver parable components are provided with the reference numbers in FIGS. 1 and 2 Be used.

The invention thus creates a drive device for mobile work equipment, in which the multi-disc brake in Area 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 effort can be kept low.

As is evident from the exemplary embodiments shown, the invention can experience a number of application-specific modifications. A different education from the housing parts and the system connections will be necessary depending on the use. Furthermore, e.g. B. the hy draulic piston assembly 21 can be formed in one piece, instead of the screw shown here the ring disk 23 and the actuating section 24th

Claims (15)

1. Drive device for mobile work equipment, such as. B. vibratory roller vehicles, forklifts and the like., With egg NEM hydraulic motor ( 1 ), in particular a radial piston multi-stroke hydraulic motor, a hydraulic multi-disc brake ( 2 ), and a bearing ( 3 ) for a drive shaft ( 4 ) with the driven part, such as. B. the vibrating roller or the drive wheel of the implement is connected, characterized in that the multi-disc brake ( 2 ) covers the bearing ( 3 ) at least partially axially. 2. Drive device according to claim 1, in which the drive shaft ( 4 ) is connected via a shaft flange ( 14 ) to the part to be driven, characterized in that the shaft flange ( 14 ) is firmly connected to a component of the multi-disc brake ( 2 ) . 3. Drive device according to claim 2, characterized in that the multi-disc brake ( 2 ) behind the shaft flange ( 14 ). 4. Drive device according to claim 2 or 3, characterized in that the shaft flange ( 14 ) is part of the multi-disc brake ( 2 ). 5. Drive device according to claim 4, characterized in that the shaft flange ( 14 ) is widened radially on the outside ( 28 ) and a drive toothing ( 29 ) for the drive-side lamellar discs ( 19 ) Ausbil det. 6. Drive device according to claim 5, characterized in that the widening of the shaft flange ( 28 ) forms a sealing surface for a in a first Ge housing half ( 18 ) of the multi-disc brake ( 2 ) accommodated seal ( 32 ). 7. Drive device according to claim 6, characterized in that a cover part ( 18 ) of the multi-disc brake ( 2 ) is axially removable on a further housing half ( 6 ) can be fastened. 8. Drive device according to claim 7, characterized in that the further housing half ( 6 ) is part of the housing of the hydraulic motor ( 1 ). 9. Drive device according to claim 7 or 8, characterized in that the further housing half ( 6 ) forms chambers for receiving return springs ( 27 ) of the multi-disc brake ( 2 ). 10. Drive device in particular according to one of Ansprü che 1 to 9, with a against the force of a return spring arrangement ( 27 ) working multi-disc brake ( 2 ), de ren disc discs ( 19 , 20 ) by the return spring arrangement ( 27 ) can be pressed against each other and by means of a Hydraulic piston arrangement ( 21 ) can be brought out of operation by applying pressure fluid to a pressure chamber ( 31 ), characterized in that the pressure chamber ( 31 ) of the hydraulic piston arrangement ( 21 ) is essentially axially aligned with the lamellar discs ( 19 , 20 ) is arranged. 11. Drive device according to claim 10, characterized in that the hydraulic piston arrangement ( 21 ) acted upon by the return spring arrangement ( 27 ) extends with an actuating section ( 24 ) sealed by a partition ( 25 ) which limits the pressure chamber ( 31 ) . 12. Drive device according to claim 11, characterized in that the hydraulic piston assembly ( 21 ) is formed by an annular disc ( 23 ) which carries a plurality of adjusting pins ( 24 ) in a uniform circumferential distance from one another, which are separated by corresponding recesses in the partition ( 25 ) extend through. 13. Drive device according to claim 11, characterized in that the hydraulic piston assembly ( 21 ) is formed by an annular disc ( 23 ) which carries an adjusting ring ( 24 ) which is sealed by a two-part partition ( 25 ) therethrough extends. 14. Drive device according to one of claims 11 to 13, characterized in that the partition ( 25 ) has an annular disc shape. 15. Drive device according to one of claims 11 to 14, characterized in that the partition ( 25 ) has an outer diameter which does not protrude beyond the outer diameter of the hydraulic piston assembly ( 21 ).