EP0727528B1 - Sweeping device for utility vehicle - Google Patents

Abstract

The sweeper (1) has a rotary brush (2) with motor drive. The brush is coupled via a jointed shaft coupling (32) to a drive shaft (6) of the motor drive, for torque transmission. On the bearing side, the brush with/without its carrier element (9), can be pivoted out of its carrier unit about the coupling, for dismantling. A central bearing shaft with approx. square cross section, is located coaxially to the rotary brush. It is connected on the bearing side to a bearing journal (41). The carrier elements (9) are formed as walls. The bearing-sided wall has an open mounting slot for the bearing journal.

Description

The invention relates to a sweeper for work vehicles for cleaning traffic areas according to the preamble of claim 1.

Sweeping devices of the generic type are known (DE-U-89 11 758), which can be attached to a work vehicle are provided. These sweepers have a Protective or support housing on which is a bristle roller covering at least on the top. In use, the Bristle roller with its axis of rotation substantially transverse to Direction of travel and is opposite in operation in the circumferential direction the direction of travel of the work vehicle by motor driven in rotation. The bristle roller has a central one coaxial to the axis of rotation of the bristle roller Bearing shaft, which is an integral part of the bristle roller is. For storing the bristle roller on the protective housing is the protective housing with two side walls provided, on the one, drive-side support wall a bristle roller drive is provided with which the bristle roller is coupled in a torque-locking manner. On the side opposite the bristle roller drive the bristle roller on the second bearing-side support wall by means of a bearing pin of the bearing shaft in a removable Bearing rotatably.

In the known construction extends through a drive shaft of the bristle roller drive in the assembled state the drive-side support wall by a in the Support wall provided through hole, whereby a bearing on the drive side in the supporting wall provided for rotatable, fixed mounting of the drive shaft is. The two bearings are on the supporting walls put on. The bearing shaft is on the drive side articulated shaft coupling with the bristle roller drive connected torque-wise.

To disassemble or replace the bristle roller what for example after the wear limit has been reached is, the bearing on the bearing-side support wall be released from this and the bristle roller when lifting the entire carrying device from one side down be pivoted out of the support housing. After loosening the torque connections between the actual bristle roller and the bearing shaft can the bristle roller from be removed from the bearing shaft and replaced with a new one. The torque connection between the bearing shaft and the actual bristle roller is known in this Sweeper designed extremely expensive, so that But also loosen the assembly of this torque connection is also expensive.

From DE-A-37 36 822 there is a torque connection between Bearing shaft and bristle roller become known which end plates of the bristle roller with a middle square opening are provided with which the bristle roller fits snugly on a square Section of a drive shaft sits. The bristle roller itself is extreme in this known sweeper complex and therefore expensive.

Another known sweeper (US-A-4,926 517) must remove one of the supporting walls to remove the bristle roller be removed beforehand, reducing the construction effort and the weight of the sweeper is very large. In addition, the torque connection is in this sweeper very susceptible to wear between the charge roller drive. It is with this construction articulated shaft couplings are also provided, which, however exclusively for alignment of the storage the bristle roller on the axis of rotation of the bristle roller serve.

Furthermore, sweeping devices have also become known, where on both sides the bearings on the bulkheads disassembled and on the drive side for torque transmission provided coupling bushes are withdrawn have to. Some known sweepers must also even the complete one to change the bristle roller Bristle roller drive can be dismantled. After removal the coupling bushes or the bristle roller drive and the bilateral bearing can the bristle roller in its Longitudinal direction in the direction of the bristle roller drive be moved so that they first with their the journal opposite the bristle roller drive from the through hole of the bearing side Carrier wall is removable. After moving the charge roller in the opposite direction is the drive side Bearing pin with its coupling pin the through hole of the drive-side support wall can be brought out, so that by lifting the protective housing with its two supporting walls, the protective housing from the Bristle roller is removable. The installation of a new bristle roller takes place in the reverse order the work passages.

Furthermore, sweeping devices are known, in which one of the supporting walls is screwed to the protective housing and to replace the bristle roller in the event of wear for example, as already for the sweeper US-A-4 926 517 mentioned above, the bearing side support wall must be completely removed so that the bearing shaft together with the bristle roller from the opposite, drive-side bearing can be pulled out and only then the protective housing or the rest of the protective housing removable with its second support wall from the bristle roller is. In the previously known sweeping devices consequently the replacement of a bristle roller in the event of wear extremely time consuming and therefore also costly.

The invention has for its object a sweeper of the generic type in such a way that a simple and time-saving replacement of one worn bristle roller with as little construction as possible Effort can be done.

The object is achieved by the features of claim 1.

The inventive design of the sweeping device is the bristle roller for example after loosening of the bearing on its bearing-side support element when lifting the sweeping device on one side from the carrying device or out of the support member, the bristle roller on the drive side through the articulated shaft coupling raised and thus pivoted around the shaft coupling becomes. This causes the bristle roller to tilt reached, which is so large that the bristle roller laterally from the support device or on the support element peelable past. The bristle roller can then their articulated shaft coupling pulled from the drive shaft be so that they are completely from the carrying device is released. The simple design the bearing shaft with a cross section on which the roller cylinder can be pushed on in a form-fitting manner now the bearing shaft is pulled out of the roller cylinder and inserted into a new roller cylinder, so that a renewal of the bristle roller in the simplest way can be carried out.

When installing the bristle roller with its shaft coupling pushed onto the drive shaft, the Carrier is raised. When lowering the drive housing pushes the bearing element on the bearing side again over the bearing bolt or over the bearing of the bristle roller, so that with the sweeper completely lowered only the bearing is mounted or on its support element must be fixed and thus the exchange of Bristle roller is completed.

However, the articulated shaft coupling is not from the bearing journal easy removal of the bristle roller drive, This means that the roller cylinder can also move out at an angle downwards the support device protruding bearing shaft from this removed and replaced by a new roller cylinder become. That is, in this case, the replacement of Bristle roller is simplified in that the articulated Shaft coupling not threaded on the drive shaft must be, but by simply postponing the new roller cylinder on the bearing shaft of the exchange the bristle roller takes place.

To fix the roller cylinder on the bearing shaft the bearing end of the bristle roller is a holding washer provided, for example by means of clamping screws can be fixed in the appropriate position on the bearing shaft is. This ensures that the bearing shaft no longer compared to the roller cylinder after it Can slide into each other and thus in particular during the assembly of the bristle roller on the carrying device is held securely in this position.

The cross section can be used to establish the torque connection the bearing shaft according to claim 2 approximately square be formed, the bearing shaft itself from a corresponding square tube is formed. Thus one simple and inexpensive manufacture of the sweeper reached.

Since the roller cylinder according to claim 3, the roller bristles carries, therefore, the intended coaxial to the bristle roller running bearing shaft itself no longer replaced because on this the roller cylinder with its roller bristles is interchangeably postponed. For torque transmission from the bearing shaft to the roller cylinder the bristle roller has the roller cylinder at least in Area of its ends bearing washers, each are provided with an opening, the cross section of which is adapted to the cross-sectional profile of the bearing shaft. In order to becomes a secure form-fitting, axially against each other Slidable connection between the bearing shaft and the Bearing washers and thus reached the roller cylinder, so that a safe torque transmission from the bearing shaft guaranteed on the roller cylinder with its roller bristles is. A complex loosening or assembly this torque connection is therefore to be renewed the bristle roller is not necessary.

To secure the roller cylinder on the bearing shaft furthermore the bearing shaft in the area of the shaft coupling be provided with a stop disc against which the Roller cylinder is pushed during assembly. So that is the position of the roller cylinder on the bearing shaft fixed.

According to claim 4 is for easy one-sided lead out the journal of the bristle roller in the example designed as a supporting wall a side or mounting slot open at the bottom, so that after loosening the bearing the bearing pin together with his camp or after pulling the camp in simpler Way out of the mounting slot and at Lift the sweeper out of the carrying device becomes.

Fig. 1

eine Kehrvorrichtung in Frontansicht;

Fig. 2

einen vergrößerten Teilschnitt III aus Fig. 1;

Fig. 3

eine Seitenansicht II der Kehrvorrichtung aus Fig. 1;

Fig. 4

eine angehobene Kehrvorrichtung mit lagerseitig aus dem Schutzgehäuse herausgeführter Borstenwalze;

Fig. 5

einen Schnitt V-V aus Fig. 4.

An exemplary embodiment of the invention is explained in more detail below with reference to the drawing. It shows:

Fig. 1

a sweeper in front view;

Fig. 2

an enlarged partial section III of Fig. 1;

Fig. 3

a side view II of the sweeper of Fig. 1;

Fig. 4

a raised sweeping device with a bristle roller led out of the protective housing on the bearing side;

Fig. 5

4 shows a section VV from FIG. 4.

The sweeping device 1 shown in FIG. 1 has one Bristle roller 2, which is driven by a bristle roller 3 is driven in rotation. The bristle roller drive 3 consists of a drive gear 4, which in Height of the axis of rotation 5 of the bristle roller 2 a drive shaft 6 has. The sweeping device 1 has a carrying device 50 with two lateral support elements in the form of Walls 7, 9 on. The drive gear 4 is on his drive-side support wall 7 arranged on the outside, wherein the support wall 7 is part of a protective housing 8, which covers the bristle roller 2 on the top. The Protective housing 8 has the bristle roller drive on it 3 opposite end face a second support wall 9 on which in its lower end with a bearing 10 provided for rotatable mounting of the bristle roller 2 is. To stabilize the protective housing 8 is on the top a support tube 11 is provided, which the two Support walls 7 and 9 parallel to the axis of rotation 5 of the bristle roller 2 runs together. The drive of the Bristle roller 2 is carried out by means of a hydraulic motor (in the Drawing not shown) or from the PTO one Drive vehicle, the torque via a drive pin 12 on the drive gear 4 and from there on the drive shaft 6 and thus on the bristle roller 2 is transmitted. The bristle roller 2 is in the present Embodiment of three separate roller sections 13, 14, 15 formed, each from a roller cylinder 16, 17, 18 with radially extending to the axis of rotation 5 Roll bristles 19, 20, 21 exist. The roller cylinders 16, 17, 18 are in their respective end regions each with a bearing washer 22, 23 or 24, 25 or 26, 27 provided, the bearing disc 27 for receiving an articulated shaft coupling 28 in the roller cylinder 18 at a distance from the drive end 29 of the roller section 15 arranged in the roller cylinder 18 is.

The bearing disks 22 to 27 are together with their roller cylinders 16, 17, 18 pushed onto a bearing shaft 30, which in the present embodiment as a square tube is formed and from the bearing washers 22 to 27 is appropriately enclosed. The roller sections 13, 14, 15 with their bearing disks 22 to 27 can be pushed onto the bearing shaft 30, with on the drive side End of the bearing shaft 30 a stop flange 31 is provided. The drive side is on the stop flange 31 torque-locking an articulated shaft coupling in Bolted shape of a universal joint 32.

The roller sections 13, 14, 15 are on the bearing shaft immovable in the axial direction by means of a holding disk 42 held, the holding disc 42 for example fixable on the bearing shaft 30 by means of clamping screws can be. When the clamping screws are loosened, the Holding disc 42 of course with the free end of the Bearing shaft 30 removable from this.

FIG. 2 shows an enlarged section III from FIG. 1, in which the roller section 15 is shown in section is. For reasons of clarity, the drive gear is 4 not shown in section. In the drive side End portion of the roller cylinder 18 of the Roller section 15, the bearing disc 27 is arranged, which has an opening 33 which has a square Has cross section and the square in cross section Bearing shaft 30 encloses almost without play. The Bearing shaft 30 extends through the bearing disk 27 on the drive side and protrudes into the stop flange 31 accordingly provided opening 34 of the stop flange 31. In the opening 34 is the bearing shaft 30 with the stop flange 31 welded, the drive side Universal joint 32 with a mounting flange 35 on the stop flange 31 is screwed on. The universal joint 32 is with its gearbox-side bearing sleeve 36 on a corresponding toothing 37 of the drive shaft 6 is pushed on and on this by means of a bearing sleeve 36 and the drive shaft 6 protruding locking pin together 37 axially immovably secured.

The bearing sleeve 36 of the universal joint 32 has a U-shape formed fork element 38, which with a corresponding Fork element 39 of the mounting flange 35 is pivotally connected. The two fork elements 38, 39 are mutually perpendicular by two extending pivot axes pivotable so that the bearing shaft 30, which is screwed onto the mounting flange 35 is compared to the bearing sleeve 36 and thus also with respect to the drive shaft 6 of the drive gear 4 is freely pivotable. Through the locking pin 37 and Screwing the mounting flange 35 is the bearing shaft 30 axially immovable relative to the drive shaft 6 or relative to the drive gear 4 and thus also opposite the protective housing 8, the drive-side support wall 7 in Fig. 2 can be seen.

The bearing side is on the supporting wall 9 of the protective housing 8 the bearing 10 placed on the outside and by means of screw connections screwed to the supporting wall 9.

As can be seen from Fig. 3, the support wall 9 is vertical below the bearing 10 with a vertically downward provided open mounting slot 40. The bearing shaft 30 has on the bearing side a journal 41 with which they protrudes through the mounting slot 40 and on the outside the supporting wall 9 of the screwed-on bearing housing of the bearing 10 rotatably mounted for example by means of a roller bearing is. Through the mounting slot 40 is achieved that when loosened and possibly pulled off the journal 41 Bearing 10 from the bearing shaft 30 with its journal 41 the mounting slot 40 and thus from the protective housing 8 or the support wall 9 can be brought out, provided the sweeping device 1 is raised from underground 43 like this is shown in Fig. 4.

Due to the flexibility of the roller bristles 21 in the left the upper area of the protective housing 8 is pivoted the bearing shaft 30 and thus the entire bristle roller 2 as far as possible that with distant bearing 10 and distant Holding disc 42, the roller sections 13, 14, 15th successively from the bearing shaft 30 below the bearing side Support wall 9 are removable and by accordingly new roller sections can be replaced. The roller bristles 21 are in this position, as can be seen from FIG. 4 is in the upper left area of the protective housing 8 just squeezed.

It is also possible that the universal joint 32 with its Bearing sleeve 36 on the drive shaft 6 of the drive gear 4 is axially displaceable, i.e. that no locking pin 37 is provided so that the bearing shaft together with the roller sections 13, 14, 15 i.e. so the entire bristle roller 2 with the complete universal joint 32 from the drive shaft 6 from that shown in FIG. 4 Location is removable and is exposed, so that only afterwards by simply pulling the bearing shaft 30 out of the Roll sections 13, 14, 15 by this accordingly new threading of the new roller sections on the bearing shaft 30 are replaceable.

By subsequently lowering the sweeping device 1 or the protective housing 8 engages around the mounting slot 40 corresponding positioning of the bearing pin 41, so that the bearing 10 can be pushed onto the journal 41 and accordingly on the outside of the bearing side Support wall 9 is screwed.

Fig. 5 shows a section V-V from Fig. 4 in which recognizable is that the bearing washer 25 stuck without play arranged in the roller cylinder 17 of the roller section 15 is. The bearing disc 25 has a square Breakthrough 43, which fits, but axially displaceable the bearing shaft 30, the square cross section 5 can also be seen, encloses. In the same The other ones are the same as the bearing disk 25 Bearing washers 22, 23, 24, 26 and 27, as dashed lines in Fig. 1 or shown in section in FIG. 4, formed, so that the drive shaft 6 and that Universal joint 32 drive torque introduced into the bearing shaft 30 securely over the bearing washers 22 to 27 on the corresponding roller cylinders 16, 17, 18 and thus transferred to their roller bristles 19, 20 and 21 respectively becomes.

The inventive design of the sweeping device 1 is a simple replacement of a worn one Bristle roller 2 feasible. It is understood that instead of of the three roller sections 13, 14, 15 also in one piece trained roller section, which over the entire width of the sweeping device 1 is provided can be.

Furthermore, it is also provided that the mounting slot 40 runs horizontally, so that after loosening and removal of the bearing 10 from the journal 41 of the shaft journal or the bearing shaft 30 first horizontally from the mounting slot 40 is performed before the bristle roller 2 on one side can be lowered when the sweeper 1 is raised becomes.

It is also conceivable that the bearing 10 on the inside the bearing-side support wall 9 is arranged, wherein in this case, an assembly slot 40 is not necessarily provided must be, since the bearing 10 after its release with the journal 41 along the inside of the support wall 9 when lifting the sweeper 1 out to the outside is. The intended mounting slot 40 has, however the advantage that with appropriate training of the bearing housing of the bearing 10 with a in the mounting slot 40th correspondingly applicable housing section that Bearing 10 and thus the bristle roller 2 centered in a defined manner is held on the support wall 9.

Furthermore, the bearing housing of the bearing 10 can also be fixed be welded to the support wall 9 so that for pivoting the bristle roller 2 from the carrier device 50 out the support wall 9 on the support device 50 and whose support tube 11 is detachably screwed and before Pivoting is unscrewed. The bristle roller 2 is then together with the support wall 9 and with the bearing 10 the support device 50 pivoted out, the bearing 10 disassembled and the bristle roller 2 by a new bristle roller replaced.

Another advantage of the universal joint 32 provided is that 100% coaxial alignment of the Drive shaft 6 of the drive gear 4 and the bearing shaft 30 in the operating state, i.e. in assembled condition is not necessary because such angular deviations from the coaxial course of the drive shaft 6 to the bearing shaft 30 be balanced by the universal joint 32. Instead of the universal joint 32 are also known articulated shaft couplings, e.g. Constant velocity joints and the like.

Claims (4)

1. Sweeping device (1) for utility vehicles for cleaning road surfaces (44) with a brush roller (2) driven in a rotary manner by a motor at at least one side, which roller (2) comprises a central bearing shaft (30) extending coaxially with respect to the brush roller (2) and is mounted to rotate in a support device with two lateral support members (7, 9), whereby provided on the support member (7) at the driving side is a brush roller drive (3), by means of the drive shaft (6) of which the bearing shaft (30) is connected by way of an articulated shaft coupling (32) for the transmission of torque and the brush roller (2) is mounted to rotate on the other support member (9) by means of a bearing pin (41) in a bearing (10) which can be dismantled and is able to tilt at one side about the shaft coupling (32) for dismantling from the support device (50), and the brush roller (2) comprises at least one roller cylinder (16, 17, 18), characterised in that the bearing shaft (30) has a cross-section onto which the roller cylinder (16, 17, 18) can be pushed in a form-locking manner to produce a torque connection, and that by means of a retaining disc (42) able to be fixed on the bearing shaft (30) so that it can be dismantled, the roller cylinder (16, 17, 18) is attached to the bearing shaft (30) so that it is non-displaceable in its longitudinal direction.
2. Sweeping device according to Claim 1, characterised in that the bearing shaft (30) is constructed as a square tube and has an approximately square cross-section.
3. Sweeping device according to Claim 1 or 2, characterised in that the roller cylinder (16, 17, 18) is provided with bearing discs (22, 23, 24, 25, 26, 27) and radial roller bristles (19, 20, 21) and that the bearing discs (22 to 27) have openings (33, 42) adapted in cross-section to the bearing shaft (30), by which the roller cylinder (16, 17, 18) can be pushed approximately free from play onto the bearing shaft (30) so that it is exchangeable.
4. Sweeping device according to Claim 1, 2 or 3, characterised in that the support members are constructed as support walls (7, 9) and that for the emergence of the bearing pin (41), the support wall (9) on the bearing side comprises a mounting slot (40) which is open on the side or under side.

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